Flash Flood Prediction Program
by f2p2@udfcd.org
Time: 1210 PM Sun June 30, 2024
Forecaster: Justin Brooks
-------------------------
Internal Message Status
Flash Flood Prediction Program
-------------------------
MESSAGES 1’S HAVE BEEN ISSUED EFFECTIVE UNTIL 10:00 PM
Message 1’s have been issued for the entire District effective
until 10:00pm this evening.
Storms have started to initiate to the west already today and will
likely continue into the afternoon with a couple of rounds of
showers/thunderstorms possible for the District today. Elevated dew
points, currently in the upper 50s to nearly 60 will result in
efficient rainfall producing storms this afternoon and evening with a
good chance for moderate to heavy rainfall for some locations leading
to localized flooding.
This initial round of storms will meander into the District over the
next hour or so, with additional showers and thunderstorms likely
forming along outflow boundaries into the afternoon. Storm motions
will generally be west to east around 10mph, however, storms formed
along outflow boundaries will have the largest potential for heavy
rainfall as they tend to anchor in place for extended periods. Storms
today may also contain gusty winds up to 60mph and hail up to 1.0”
resulting in a LOW chance for severe weather, likely favoring eastern
portions of the District.
There will be an additional round of showers and thunderstorms later
this evening, similar to yesterday between 7-10pm. Due to excess
moisture in place, and good upper-level support, there will be a
continued chance for moderate to heavy rainfall into the late evening
hours. A few off and on showers will be possible overnight, although
the threat of heavy rainfall should diminish after 10pm. Overnight
will be cloudy as low temperatures drop into the low 60s on the
plains.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers/thunderstorms
today will produce 0.10-0.50" total in 10-30 minutes. Moderate to
strong thunderstorms will produce up to 0.50-1.00” total in 10-30
minutes.
WORST CASE SCENARIO: Stationary thunderstorms, or training of
thunderstorm cells have the potential to produce up to 2.00” total
in 30-60 minutes.
COUNTY
MESSAGE
VALID TIMES
PRIME TIME
Jefferson County
1
Current TO 1000 PM
Current TO 930 PM
Boulder County
1
Current TO 1000 PM
Current TO 930 PM
the City of Aurora
1
Current TO 1000 PM
Current TO 930 PM
Arapahoe County
1
Current TO 1000 PM
Current TO 930 PM
DIA
1
Current TO 1000 PM
Current TO 930 PM
Denver County
1
Current TO 1000 PM
Current TO 930 PM
Adams County
1
Current TO 1000 PM
Current TO 930 PM
Douglas County
1
Current TO 1000 PM
Current TO 930 PM
Broomfield County
1
Current TO 1000 PM
Current TO 930 PM
Lakewood
1
Current TO 1000 PM
Current TO 930 PM
Arvada
1
Current TO 1000 PM
Current TO 930 PM
Wheat Ridge
1
Current TO 1000 PM
Current TO 930 PM
County-specific Quantitative
Precipitation Outlook PRECIPITATION TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
Current TO 1000 PM SUN
0.1" (75%) to 0.5" (50%) to 1" (25%)
ISSUED
Arapahoe
Current TO 1000 PM SUN
0.1" (75%) to 0.5" (50%) to 1" (25%)
ISSUED
Boulder
Current TO 1000 PM SUN
0.1" (60%) to 0.5" (40%) to 1" (20%)
ISSUED
Broomfield
Current TO 1000 PM SUN
0.1" (60%) to 0.5" (40%) to 1" (20%)
ISSUED
Denver
Current TO 1000 PM SUN
0.1" (75%) to 0.5" (50%) to 1" (25%)
ISSUED
Douglas
Current TO 1000 PM SUN
0.1" (75%) to 0.5" (50%) to 1" (25%)
ISSUED
Jefferson
Current TO 1000 PM SUN
0.1" (60%) to 0.5" (40%) to 1" (20%)
ISSUED
Foothills above 6500ft
Boulder
Current TO 1000 PM SUN
0.1" (60%) to 0.5" (40%) to 1" (20%)
ISSUED
Douglas
Current TO 1000 PM SUN
0.1" (60%) to 0.5" (40%) to 1" (20%)
ISSUED
Jefferson
Current TO 1000 PM SUN
0.1" (60%) to 0.5" (40%) to 1" (20%)
ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
5 months, 3 weeks
Flash Flood Prediction Program
by f2p2@udfcd.org
Time: 906 AM Sun June 30, 2024
Forecaster: Justin Brooks
-------------------------
Heavy Precipitation Outlook
Flash Flood Prediction Program
-------------------------
Warmer today with another chance for afternoon and evening
showers/isolated thunderstorms
Once again, very little change to the overall pattern will bring
similar conditions as yesterday across the District. Due to late
evening precipitation yesterday, dew points currently in the upper 50s
to around 60 and will result in an increased chance for moderate to
brief heavy rainfall today. Temperatures will reach the low 90s this
afternoon with partly cloudy skies. There will be a chance for a
couple of rounds of storms today, the first this afternoon, likely
between 2-5pm and another late round between 7pm-10pm. A few lingering
showers will be possible during the overnight, although the largest
threat for moderate to heavy rainfall will be during the initial round
and possibly into the later evening. A very slight chance storms
become severe today, mainly for areas east of the District, with gusty
winds up to 60mph and hail up to 1.0” in diameter.
Initial storm development will occur by midday along the higher
elevations and move into the District during the early afternoon.
Storm motions will generally be between 10-20mph which should help
limit point rainfall amounts. However, stronger storms could produce
outflow boundaries, likely resulting in some erratic storm movement
leading to a better chance of isolated moderate to heavy rainfall. The
largest threat today will most likely be a quick 0.50-1.00” in 10-30
minutes, rather than any long-lasting rainfall.
Storms will lose intensity into the evening hours with isolated
showers possible between 7pm-10pm, although a few embedded
thunderstorms cannot be completely ruled out. A few lingering showers
overnight as temperatures decrease into the low to mid 60s on the
plains with upper 50s to around 60 degrees along the foothills.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers and isolated
thunderstorms will produce a 0.10-0.50” total in 10-30 minutes. A
moderate to strong shower/thunderstorm will produce 0.50-1.00” total
in 10-30 minutes.
WORST CASE SCENARIO: A strong, stationary thunderstorm, or training of
thunderstorm cells will have the potential to produce up to 2.00”
total in 30-60 minutes.
A LOOK AHEAD: Tomorrow will start to dry out at the surface with more
typical dew points in the upper 30s to low 40s in the afternoon. A
chance for afternoon showers and isolated thunderstorms will be
possible, although with decreased dew points, high-based storms will
be possible with minimal rainfall expected at this time. Tuesday will
be similar with another chance for high-based afternoon and evening
showers/isolated thunderstorms with minimal precipitation as most
struggle to reach the surface during peak daytime heating. This will
likely result in gusty sprinkles rather than any meaningful rainfall.
LOCATION
PRIME TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
200 PM TO 1159 PM
0.1" (70%) to 0.5" (35%) to 1" (15%)
MOD
Arapahoe
200 PM TO 1159 PM
0.1" (70%) to 0.5" (35%) to 1" (15%)
MOD
Boulder
200 PM TO 1159 PM
0.1" (60%) to 0.5" (30%) to 1" (15%)
MOD
Broomfield
200 PM TO 1159 PM
0.1" (60%) to 0.5" (30%) to 1" (15%)
MOD
Denver
200 PM TO 1159 PM
0.1" (70%) to 0.5" (35%) to 1" (15%)
MOD
Douglas
200 PM TO 1159 PM
0.1" (60%) to 0.5" (30%) to 1" (15%)
MOD
Jefferson
200 PM TO 1159 PM
0.1" (60%) to 0.5" (30%) to 1" (15%)
MOD
Foothills above 6500ft
Boulder
200 PM TO 1159 PM
0.1" (60%) to 0.5" (30%) to 1" (15%)
MOD
Douglas
200 PM TO 1159 PM
0.1" (60%) to 0.5" (30%) to 1" (15%)
MOD
Jefferson
200 PM TO 1159 PM
0.1" (60%) to 0.5" (30%) to 1" (15%)
MOD
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
5 months, 3 weeks
Flash Flood Prediction Program
by f2p2@udfcd.org
Time: 826 PM Sat June 29, 2024
Forecaster: Justin Brooks
-------------------------
Internal Message Status
Flash Flood Prediction Program
-------------------------
MESSAGE 1’S WILL BE ALLOWED TO EXPIRE AT 9:00PM
Message 1’s will be allowed to expire at 9:00 PM as the threat of
heavy rainfall has come to an end.
A few strong thunderstorms impacted the Denver Metro earlier this
afternoon and have since moved eastward and out of the District. Some
lingering showers persist for portions of the District at this time
and will likely remain into the evening hours. There will be a slight
chance for off and on showers and possibly a weak thunderstorm or two
later this evening.
The best chance for additional showers will be between now-midnight
with skies partially clearing through the overnight. Overnight
temperatures will drop into the low 60s for the plains with mid to
upper 50s along the foothills. Partly cloudy sky conditions are
expected overnight and through daybreak tomorrow.
Tomorrow will bring another chance for moderate to heavy rainfall with
a few rounds of storms possible in the afternoon and into the evening
with the potential for a few showers to linger into the late evening
hours.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers will produce a
trace to 0.20" total in 10-30 minutes. A moderate to strong
shower/thunderstorm will produce 0.20-0.40" total in 10- 30 minutes.
WORST CASE SCENARIO: If a stationary, strong thunderstorm is produced
it will have the potential to have between 0.40- 0.80" total in 30-60
minutes.
COUNTY
MESSAGE
VALID TIMES
PRIME TIME
Denver County
1
Current TO 900 PM
Current TO 830 PM
Adams County
1
Current TO 900 PM
Current TO 830 PM
Douglas County
1
Current TO 900 PM
Current TO 830 PM
Broomfield County
1
Current TO 900 PM
Current TO 830 PM
Jefferson County
1
Current TO 900 PM
Current TO 830 PM
Boulder County
1
Current TO 900 PM
Current TO 830 PM
Lakewood
1
Current TO 900 PM
Current TO 830 PM
Wheat Ridge
1
Current TO 900 PM
Current TO 830 PM
Arvada
1
Current TO 900 PM
Current TO 830 PM
the City of Aurora
1
Current TO 900 PM
Current TO 830 PM
DIA
1
Current TO 900 PM
Current TO 830 PM
Arapahoe County
1
Current TO 900 PM
Current TO 830 PM
County-specific Quantitative
Precipitation Outlook PRECIPITATION TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
Current TO 1159 PM SAT
Trace (60%) to 0.2" (30%) to 0.4" (15%)
NONE
Arapahoe
Current TO 1159 PM SAT
Trace (60%) to 0.2" (30%) to 0.4" (15%)
NONE
Boulder
Current TO 1159 PM SAT
Trace (60%) to 0.2" (30%) to 0.4" (15%)
NONE
Broomfield
Current TO 1159 PM SAT
Trace (50%) to 0.2" (25%) to 0.4" (10%)
NONE
Denver
Current TO 1159 PM SAT
Trace (60%) to 0.2" (30%) to 0.4" (15%)
NONE
Douglas
Current TO 1159 PM SAT
Trace (40%) to 0.2" (20%) to 0.4" (10%)
NONE
Jefferson
Current TO 1159 PM SAT
Trace (40%) to 0.2" (20%) to 0.4" (10%)
NONE
Foothills above 6500ft
Boulder
Current TO 1159 PM SAT
Trace (50%) to 0.2" (30%) to 0.4" (15%)
NONE
Douglas
Current TO 1159 PM SAT
Trace (40%) to 0.2" (20%) to 0.4" (10%)
NONE
Jefferson
Current TO 1159 PM SAT
Trace (50%) to 0.2" (30%) to 0.4" (15%)
NONE
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
5 months, 3 weeks
Flash Flood Prediction Program
by f2p2@udfcd.org
Time: 626 PM Sat June 29, 2024
Forecaster: Justin Brooks
-------------------------
Internal Message Status
Flash Flood Prediction Program
-------------------------
MESSAGES 1’S HAVE BEEN ISSUED EFFECTIVE Until 9:00 PM
Message 1’s have been issued for the entire District effective
until 9:00pm this evening.
A round of storms have moved into the District bringing isolated
moderate to heavy rainfall with 0.20”-0.25” in 5-10min out of some
cells. These storms will continue to impact the District over the next
few hours, with a few lingering showers possible through midnight.
Storms will generally move from west to east between 10-20mph,
however, gust front have caused a few storms to become stationary, and
these storms will provide the largest threat for moderate to brief
heavy rainfall. Storms may also contain gusty winds and frequent
cloud-to-ground lightning. The largest threat will be a quick 0.50”
in 10-30 minutes rather than any long lasting rain.
Storms should weaken in intensity behind this first round with off and
on showers possible until midnight. Overnight will be partly cloudy
with low temperatures dropping into the low 60s on the plains with mid
to upper 50s along the foothills.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers/thunderstorms
today will produce a trace to 0.30" total in 10-30
minutes. Moderate to strong thunderstorms will produce up to
0.30-0.60” in 10-30 minutes.
WORST CASE SCENARIO: Stationary thunderstorms, or training of
thunderstorm cells have the
potential to produce up to 1.20” total in 30-60 minutes.
COUNTY
MESSAGE
VALID TIMES
PRIME TIME
the City of Aurora
1
Current TO 900 PM
Current TO 830 PM
Arapahoe County
1
Current TO 900 PM
Current TO 830 PM
DIA
1
Current TO 900 PM
Current TO 830 PM
Denver County
1
Current TO 900 PM
Current TO 830 PM
Adams County
1
Current TO 900 PM
Current TO 830 PM
Douglas County
1
Current TO 900 PM
Current TO 830 PM
Broomfield County
1
Current TO 900 PM
Current TO 830 PM
Jefferson County
1
Current TO 900 PM
Current TO 830 PM
Boulder County
1
Current TO 900 PM
Current TO 830 PM
Lakewood
1
Current TO 900 PM
Current TO 830 PM
Arvada
1
Current TO 900 PM
Current TO 830 PM
Wheat Ridge
1
Current TO 900 PM
Current TO 830 PM
County-specific Quantitative
Precipitation Outlook PRECIPITATION TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
Current TO 1159 PM SAT
Trace (80%) to 0.25" (60%) to 0.5" (40%)
ISSUED
Arapahoe
Current TO 1159 PM SAT
Trace (80%) to 0.25" (60%) to 0.5" (40%)
ISSUED
Boulder
Current TO 1159 PM SAT
Trace (80%) to 0.25" (40%) to 0.5" (20%)
ISSUED
Broomfield
Current TO 1159 PM SAT
Trace (80%) to 0.25" (40%) to 0.5" (20%)
ISSUED
Denver
Current TO 1159 PM SAT
Trace (80%) to 0.25" (60%) to 0.5" (40%)
ISSUED
Douglas
Current TO 1159 PM SAT
Trace (80%) to 0.25" (40%) to 0.5" (20%)
ISSUED
Jefferson
Current TO 1159 PM SAT
Trace (80%) to 0.25" (40%) to 0.5" (20%)
ISSUED
Foothills above 6500ft
Boulder
Current TO 1159 PM SAT
Trace (80%) to 0.25" (40%) to 0.5" (20%)
ISSUED
Douglas
Current TO 1159 PM SAT
Trace (80%) to 0.25" (40%) to 0.5" (20%)
ISSUED
Jefferson
Current TO 1159 PM SAT
Trace (80%) to 0.25" (40%) to 0.5" (20%)
ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
5 months, 3 weeks
Flash Flood Prediction Program
by f2p2@udfcd.org
Time: 922 AM Sat June 29, 2024
Forecaster: Justin Brooks
-------------------------
Heavy Precipitation Outlook
Flash Flood Prediction Program
-------------------------
Cooler today behind a cold front with another chance for showers and
thunderstorms this afternoon and early evening.
A cooling trend is in store for the District as a cold front pushed
through overnight resulting in high temperatures only reaching the low
80s rather than into the 90s this afternoon. These cooler temperatures
could either help or hurt our cause today as storms could very well
stay suppressed bringing a better chance for typical showers and
thunderstorms rather than any strong or severe storm potential.
The best chance for impactful storms today will be between 3-8pm with
a few lingering showers possible until 10/11pm. Storms today will move
from the W/SW to the E/NE between 10-15mph with some erratic storm
movement possible along outflow boundaries. A slightly better chance
of storms with impactful rainfall along the foothills and Palmer
Divide this afternoon and early evening as storms anchor along the
higher terrain before moving onto the plains. The largest threat for
moderate to brief heavy rainfall will be a quick 0.50” in 10-30
minutes rather than any longer lasting rainfall. Storm today may also
contain some hail and gusty wind gusts up to 40mph.
Skies will gradually clear overnight with temperatures dropping into
the low 60 for the plains with mid to upper 50s along the foothills.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers and
thunderstorms will produce a trace to 0.25” total in 10-30 minutes.
A moderate to strong thunderstorm will produce 0.25-0.50” total in
10-30 minutes.
WORST CASE SCENARIO: A strong, stationary thunderstorm, or training of
thunderstorm cells has the potential to produce up to 1.00” in 30-60
minutes.
A LOOK AHEAD: The peak of monsoonal moisture transport into Colorado
is expected to be tomorrow, with warmer temperatures reaching back
into the low 90s and atmospheric moisture levels hovering around 175%
of normal. Scattered to widespread thunderstorm activity, some
potentially severe, is expected in multiple rounds throughout the
afternoon and evening Sunday, and storms are expected to be some of
the most rain-loaded of the season so far. With a solid chunk of
moisture falling Sunday but a similar atmospheric setup, Monday will
bring similar temperatures in the low 90s and a decrease in
thunderstorm activity. Tuesday cools off by a few degrees due to the
passing of a trough to the north, which initiates another round of
afternoon thunderstorms with its passing.
LOCATION
PRIME TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
300 PM TO 1100 PM
Trace (60%) to 0.25" (30%) to 0.5" (15%)
LOW
Arapahoe
300 PM TO 1100 PM
Trace (60%) to 0.25" (30%) to 0.5" (15%)
LOW
Boulder
300 PM TO 1100 PM
Trace (60%) to 0.25" (30%) to 0.5" (15%)
LOW
Broomfield
300 PM TO 1100 PM
Trace (60%) to 0.25" (30%) to 0.5" (15%)
LOW
Denver
300 PM TO 1100 PM
Trace (60%) to 0.25" (30%) to 0.5" (15%)
LOW
Douglas
300 PM TO 1100 PM
Trace (60%) to 0.25" (30%) to 0.5" (15%)
LOW
Jefferson
300 PM TO 1100 PM
Trace (60%) to 0.25" (30%) to 0.5" (15%)
LOW
Foothills above 6500ft
Boulder
200 PM TO 1000 PM
Trace (75%) to 0.25" (50%) to 0.5" (25%)
LOW
Douglas
200 PM TO 1000 PM
Trace (75%) to 0.25" (50%) to 0.5" (25%)
LOW
Jefferson
200 PM TO 1000 PM
Trace (75%) to 0.25" (50%) to 0.5" (25%)
LOW
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
5 months, 3 weeks
Flash Flood Prediction Program
by f2p2@udfcd.org
Time: 929 AM Fri June 28, 2024
Forecaster: Justin Brooks
-------------------------
Heavy Precipitation Outlook
Flash Flood Prediction Program
-------------------------
Another hot day today with a chance for afternoon and evening
showers/isolated thunderstorms
A minimal change to the overall pattern will bring similar
conditions as yesterday across the District. Once again, a few
sprinkles to light rain for areas north of the District this morning
have cleared out at this time. Temperatures will reach the low 90s
this afternoon with partly cloudy skies. There will be a chance for a
couple of rounds of storms today, the first this afternoon, likely
between 1-5pm and another late round sometime between 7pm-midnight. A
few lingering showers will be possible during the overnight, although
the largest threat for moderate to heavy rainfall will be during the
initial round and possibly into the later evening. A slight chance
storms become severe today, mainly for areas east/northeast of the
District, with gusty winds up to 60mph and hail up to 1.0” in
diameter.
Initial storm development will occur by midday along the higher
elevations and move into the District during the early afternoon.
Storm motions will generally be between 10-15mph which should help
limit point rainfall amounts. However, stronger storms could produce
outflow boundaries, likely resulting in some erratic storm movement
leading to a better chance of isolated moderate to heavy rainfall. The
largest threat today will most likely be a quick 0.50-0.60” in 10-30
minutes, rather than any long-lasting rainfall.
Storms will lose intensity into the evening hours with more widespread
showers possible between 7pm-midnight, although a few embedded
thunderstorms cannot be completely ruled out. A few lingering showers
overnight as temperatures decrease into the low 60s on the plains with
mid to upper 50s along the foothills.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers and isolated
thunderstorms will produce a 0.05-0.30” total in 10-30 minutes. A
moderate to strong shower/thunderstorm will produce 0.30-0.60” total
in 10-30 minutes.
WORST CASE SCENARIO: A strong, stationary thunderstorm, or training of
thunderstorm cells will have the potential to produce up to 1.20”
total in 30-60 minutes.
A LOOK AHEAD: Tomorrow will cool off into the 80s behind a cold front,
with a continued chance for showers in the afternoon and evening. An
overall decrease in moisture will result in mostly high-based shower
activity with a few isolated thunderstorms possible in the afternoon
and early evening. Conditions start to dry out Sunday with
temperatures jumping back into the 90s. A slight chance for a few
high-based showers/isolated thunderstorms, favoring the higher terrain
at this time, rather than any meaningful rainfall within the District.
LOCATION
PRIME TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
200 PM TO 1159 PM
0.05" (60%) to 0.3" (30%) to 0.6" (15%)
LOW
Arapahoe
200 PM TO 1159 PM
0.05" (60%) to 0.3" (30%) to 0.6" (15%)
LOW
Boulder
200 PM TO 1159 PM
0.05" (60%) to 0.3" (30%) to 0.6" (15%)
LOW
Broomfield
200 PM TO 1159 PM
0.05" (60%) to 0.3" (30%) to 0.6" (15%)
LOW
Denver
200 PM TO 1159 PM
0.05" (60%) to 0.3" (30%) to 0.6" (15%)
LOW
Douglas
200 PM TO 1159 PM
0.05" (60%) to 0.3" (30%) to 0.6" (15%)
LOW
Jefferson
200 PM TO 1159 PM
0.05" (60%) to 0.3" (30%) to 0.6" (15%)
LOW
Foothills above 6500ft
Boulder
100 PM TO 1100 PM
0.05" (75%) to 0.3" (50%) to 0.6" (25%)
LOW
Douglas
100 PM TO 1100 PM
0.05" (75%) to 0.3" (50%) to 0.6" (25%)
LOW
Jefferson
100 PM TO 1100 PM
0.05" (75%) to 0.3" (50%) to 0.6" (25%)
LOW
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
5 months, 4 weeks
Flash Flood Prediction Program
by f2p2@udfcd.org
Time: 937 AM Thu June 27, 2024
Forecaster: Justin Brooks
-------------------------
Heavy Precipitation Outlook
Flash Flood Prediction Program
-------------------------
Cool and cloudy this morning with a good chance of afternoon and
evening showers and thunderstorms.
A few sprinkles to light rain for portions of the District this
morning will clear out as the morning progresses. Temperatures today
will reach the upper 80s to around 90 degrees this afternoon. There
will be a couple of rounds of storms today, the first this afternoon,
likely between 1-4pm and another late round sometime between 7-10pm. A
few lingering showers will be possible overnight, although the largest
threat for moderate to heavy rainfall will be during the initial round
and possibly into the later evening. A slight chance storms become
severe today, mainly for areas east of the District, with gusty winds
up to 60mph and hail up to 1.0” in diameter.
Initial storm development will occur by midday along the higher
elevations and move into the District during the early afternoon.
Storm motions will be from west to east between 10-20mph which should
help limit point rainfall amounts. However, stronger storms will
produce outflow boundaries, likely creating erratic storm movement
leading to a better chance of isolated moderate to heavy rainfall. The
largest threat today will most likely be a quick 0.50-0.75” in 10-30
minutes, rather than any long-lasting rainfall.
Storms will lose intensity into the evening hours with more widespread
showers possible between 7-10pm, although an embedded thunderstorm or
two cannot be completely ruled out. A few lingering showers overnight
as temperatures decrease into the low to mid 60s on the plains.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers and isolated
thunderstorms will produce a 0.05-0.25” total in 10-30 minutes. A
moderate to strong shower/thunderstorm will produce 0.25-0.75” total
in 10-30 minutes.
WORST CASE SCENARIO: A strong, stationary thunderstorm, or training of
thunderstorm cells will have the potential to produce up to 1.50”
total in 30-60 minutes.
A LOOK AHEAD: Very little overall change to the pattern tomorrow will
lead to similar conditions as there will be another chance for
afternoon and evening showers and thunderstorms. Another slight chance
storms will become severe, with the potential for moderate to heavy
rainfall continuing. Saturday will cool off into the 80s with a
continued chance for showers in the afternoon and evening. A decrease
in moisture will result in mostly high-based shower activity with a
few isolated thunderstorms possible in the afternoon and early
evening.
LOCATION
PRIME TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
200 PM TO 1100 PM
0.05" (60%) to 0.25" (30%) to 0.75" (15%)
MOD
Arapahoe
200 PM TO 1100 PM
0.05" (60%) to 0.25" (30%) to 0.75" (15%)
MOD
Boulder
200 PM TO 1100 PM
0.05" (60%) to 0.25" (30%) to 0.75" (15%)
MOD
Broomfield
200 PM TO 1100 PM
0.05" (60%) to 0.25" (30%) to 0.75" (15%)
MOD
Denver
200 PM TO 1100 PM
0.05" (60%) to 0.25" (30%) to 0.75" (15%)
MOD
Douglas
200 PM TO 1100 PM
0.05" (60%) to 0.25" (30%) to 0.75" (15%)
MOD
Jefferson
200 PM TO 1100 PM
0.05" (60%) to 0.25" (30%) to 0.75" (15%)
MOD
Foothills above 6500ft
Boulder
100 PM TO 1000 PM
0.05" (70%) to 0.25" (35%) to 0.75" (20%)
MOD
Douglas
100 PM TO 1000 PM
0.05" (70%) to 0.25" (35%) to 0.75" (20%)
MOD
Jefferson
100 PM TO 1000 PM
0.05" (70%) to 0.25" (35%) to 0.75" (20%)
MOD
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
5 months, 4 weeks
Flash Flood Prediction Program
by f2p2@udfcd.org
Time: 749 PM Wed June 26, 2024
Forecaster: Justin Brooks
-------------------------
Internal Message Status
Flash Flood Prediction Program
-------------------------
MESSAGE 1’S WILL BE ALLOWED TO EXPIRE AT 9:00 PM
Message 1’s will be allowed to expire at 9:00 PM as the threat of
heavy rainfall has come to an end.
A few strong thunderstorms impacted the Denver Metro earlier this
afternoon and have since moved out of the District. Some lingering
showers persist for areas surrounding the District at this time and
will likely remain north and east of the District into the evening
hours. Any remaining showers will continue to move eastward and away
from the District.
There will be a slight chance for another round of showers and
possibly a weak thunderstorm or two later this evening, favoring
eastern portions of the District at this time. The best chance for
additional showers will be between 9pm-11pm with skies partially
clearing through the overnight.
Overnight temperatures will drop into the mid 60s for the plains with
upper 50s to low 60s along the foothills. Partly cloudy sky conditions
are expected overnight and through daybreak tomorrow. Tomorrow will
bring another chance for moderate to heavy rainfall with a few rounds
of storms possible in the afternoon and early evening with the
potential for a few showers to linger into the late evening hours.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers will produce a
trace to 0.20" total in 10-30 minutes. A moderate to strong
shower/thunderstorm will produce 0.20-0.40" total in 10-30 minutes.
WORST CASE SCENARIO: A stationary, strong thunderstorm will have the
potential to produce 0.40-0.80" total in 30-60 minutes.
COUNTY
MESSAGE
VALID TIMES
PRIME TIME
Boulder County
1
Current TO 900 PM
Current TO 800 PM
Jefferson County
1
Current TO 900 PM
Current TO 800 PM
Broomfield County
1
Current TO 900 PM
Current TO 800 PM
Douglas County
1
Current TO 900 PM
Current TO 800 PM
Adams County
1
Current TO 900 PM
Current TO 800 PM
Denver County
1
Current TO 900 PM
Current TO 800 PM
DIA
1
Current TO 900 PM
Current TO 800 PM
Arapahoe County
1
Current TO 900 PM
Current TO 800 PM
the City of Aurora
1
Current TO 900 PM
Current TO 800 PM
Arvada
1
Current TO 900 PM
Current TO 800 PM
Wheat Ridge
1
Current TO 900 PM
Current TO 800 PM
Lakewood
1
Current TO 900 PM
Current TO 800 PM
County-specific Quantitative
Precipitation Outlook PRECIPITATION TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
Current TO 1159 PM WED
Trace (40%) to 0.2" (20%) to 0.4" (10%)
ISSUED
Arapahoe
Current TO 1159 PM WED
Trace (40%) to 0.2" (20%) to 0.4" (10%)
ISSUED
Boulder
Current TO 1159 PM WED
Trace (20%) to 0.2" (10%) to 0.4" (5%)
ISSUED
Broomfield
Current TO 1159 PM WED
Trace (20%) to 0.2" (10%) to 0.4" (5%)
ISSUED
Denver
Current TO 1159 PM WED
Trace (40%) to 0.2" (20%) to 0.4" (10%)
ISSUED
Douglas
Current TO 1159 PM WED
Trace (40%) to 0.2" (20%) to 0.4" (10%)
ISSUED
Jefferson
Current TO 1159 PM WED
Trace (20%) to 0.2" (10%) to 0.4" (5%)
ISSUED
Foothills above 6500ft
Boulder
Current TO 1159 PM WED
Trace (20%) to 0.2" (10%) to 0.4" (5%)
ISSUED
Douglas
Current TO 1159 PM WED
Trace (20%) to 0.2" (10%) to 0.4" (5%)
ISSUED
Jefferson
Current TO 1159 PM WED
Trace (20%) to 0.2" (10%) to 0.4" (5%)
ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
6 months
Flash Flood Prediction Program
by f2p2@udfcd.org
Time: 325 PM Wed June 26, 2024
Forecaster: Aaron O
-------------------------
Internal Message Status
Flash Flood Prediction Program
-------------------------
MESSAGE 1’S HAVE BEEN ISSUED EFFECTIVE UNTIL 9:00 PM
Message 1’s have been issued for the entire District effective
until 9:00pm for the threat of heavy rainfall with a slight chance for
severe storms across the District this afternoon and evening.
Storms have initiated along the higher terrain and are expected to
move into the District over the next hour. Storm motions are SW to NE
between 15-20 mph which could help with point rainfall amounts with
erratic storm movement likely along outflow boundaries leading to a
better chance for longer lasting moderate to heavy rainfall. Storms
may also contain large hail up to 1.0” and gusty winds up to 60mph.
Dew points are also still elevated, in the upper 40s to low 50s and
will likely help fuel moderate to heavy rainfall leading to some
localized flooding.
A couple of rounds of storms will be possibly today, likely decreasing
in strength as the evening progresses with off and on showers possible
through the overnight. Overnight temperatures will drop to the mid to
upper 60s on the plains with upper 50s to low 60s along the foothills.
STORM RAINFALL POTENTIAL AND DURATION: Typical showers/thunderstorms
today will produce a trace to 0.25" total in 10-30 minutes. Moderate
to strong thunderstorms will produce up to 0.25-0.75” in 10-30
minutes.
WORST CASE SCENARIO: Stationary thunderstorms, or training of
thunderstorm cells have the potential to produce up to 1.50” in
under 30 minutes.
COUNTY
MESSAGE
VALID TIMES
PRIME TIME
the City of Aurora
1
Current TO 900 PM
400 PM TO 800 PM
Arapahoe County
1
Current TO 900 PM
400 PM TO 800 PM
DIA
1
Current TO 900 PM
400 PM TO 800 PM
Denver County
1
Current TO 900 PM
400 PM TO 800 PM
Adams County
1
Current TO 900 PM
400 PM TO 800 PM
Douglas County
1
Current TO 900 PM
400 PM TO 800 PM
Broomfield County
1
Current TO 900 PM
400 PM TO 800 PM
Jefferson County
1
Current TO 900 PM
400 PM TO 800 PM
Boulder County
1
Current TO 900 PM
400 PM TO 800 PM
Arvada
1
Current TO 900 PM
400 PM TO 800 PM
Wheat Ridge
1
Current TO 900 PM
400 PM TO 800 PM
Lakewood
1
Current TO 900 PM
400 PM TO 800 PM
County-specific Quantitative
Precipitation Outlook PRECIPITATION TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
Current TO 900 PM WED
Trace (75%) to 0.25" (50%) to 0.75" (25%)
ISSUED
Arapahoe
Current TO 900 PM WED
Trace (75%) to 0.25" (50%) to 0.75" (25%)
ISSUED
Boulder
Current TO 900 PM WED
Trace (75%) to 0.25" (50%) to 0.75" (25%)
ISSUED
Broomfield
Current TO 900 PM WED
Trace (75%) to 0.25" (50%) to 0.75" (25%)
ISSUED
Denver
Current TO 900 PM WED
Trace (75%) to 0.25" (50%) to 0.75" (25%)
ISSUED
Douglas
Current TO 900 PM WED
Trace (75%) to 0.25" (50%) to 0.75" (25%)
ISSUED
Jefferson
Current TO 900 PM WED
Trace (75%) to 0.25" (50%) to 0.75" (25%)
ISSUED
Foothills above 6500ft
Boulder
Current TO 900 PM WED
Trace (75%) to 0.25" (50%) to 0.75" (25%)
ISSUED
Douglas
Current TO 900 PM WED
Trace (75%) to 0.25" (50%) to 0.75" (25%)
ISSUED
Jefferson
Current TO 900 PM WED
Trace (75%) to 0.25" (50%) to 0.75" (25%)
ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
6 months
Flash Flood Prediction Program
by f2p2@udfcd.org
Time: 948 AM Wed June 26, 2024
Forecaster: Laura Smith
-------------------------
Heavy Precipitation Outlook
Flash Flood Prediction Program
-------------------------
Hot, with scattered afternoon to evening thunderstorms.
A more active pattern emerges today as elevated moisture and
favorable upper-level winds support chances for scattered
thunderstorms during the afternoon and evening. Temperatures will
remain above normal with highs climbing into the low to mid 90s.
Dewpoints will be in the low 50s with precipitable water (PWAT) values
between 0.80”-1.00”. More meaningful rainfall is expected with
storms today, along with the potential for severe storms to produce
gusty outflows exceeding 58 mph and/or hail greater than 1 inch in
diameter. Thunderstorm clusters are also possible as outflow
boundaries repeatedly initiate convection. Storm motions will be from
west to east around 15-20 mph.
STORM RAINFALL POTENTIAL AND DURATION: Typical thunderstorms today
have the potential to produce up to 0.50” in 10-30 minutes. Strong
thunderstorms may produce up to 0.75” in 10-30 minutes.
WORST CASE SCENARIO: Thunderstorm clusters or complexes may be capable
of producing 1.00” or more in 30 minutes or less.
A LOOK AHEAD: Thursday will be similar, with highs in the low to mid
90s and scattered afternoon to evening thunderstorms with the
potential to produce meaningful rainfall and severe weather. The heat
wave will begin to recede southward on Friday, promoting slightly
cooler temperatures across the area broadly. Isolated showers and
thunderstorms are likely during the afternoon and evening.
LOCATION
PRIME TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Adams
200 PM TO 800 PM
0.25" (75%) to 0.5" (50%) to 0.75" (25%)
MOD
Arapahoe
200 PM TO 800 PM
0.25" (75%) to 0.5" (50%) to 0.75" (25%)
MOD
Boulder
200 PM TO 800 PM
0.25" (75%) to 0.5" (50%) to 0.75" (25%)
MOD
Broomfield
200 PM TO 800 PM
0.25" (75%) to 0.5" (50%) to 0.75" (25%)
MOD
Denver
200 PM TO 800 PM
0.25" (75%) to 0.5" (50%) to 0.75" (25%)
MOD
Douglas
200 PM TO 800 PM
0.25" (75%) to 0.5" (50%) to 0.75" (25%)
MOD
Jefferson
200 PM TO 800 PM
0.25" (75%) to 0.5" (50%) to 0.75" (25%)
MOD
Foothills above 6500ft
Boulder
200 PM TO 800 PM
0.25" (75%) to 0.5" (50%) to 0.75" (25%)
MOD
Douglas
200 PM TO 800 PM
0.25" (75%) to 0.5" (50%) to 0.75" (25%)
MOD
Jefferson
200 PM TO 800 PM
0.25" (75%) to 0.5" (50%) to 0.75" (25%)
MOD
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
6 months