Time: 253 PM Sun July 24, 2022
Forecaster: Brad Simmons
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Internal Message Status
Flash Flood Prediction Program
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MESSAGE 1'S HAVE TRANSITIONED TO MESSAGE 2'S FOR BOULDER AND DOUGLAS
COUNTIES/MESSAGE 1'S IN EFFECT FOR REMAINDER OF DISTRICT
-
Message 1's have transitioned to Message 2's (NWS Flood/Flash Flood
Watch) at 3:00 PM for Boulder and Douglas Counties and will be valid
until 10:00 PM. Message 1's remain in effect for the remainder of the
District and will also be valid until 10:00 PM. Message 1's and 2's
may be extended until midnight if a flooding threat remains.
-
Thunderstorms are beginning to fill in over the area at this time
with a SW to NE oriented line grazing SE portions of the District over
Arapahoe and Douglas Counties. Additional storms lurk west. Scattered
to numerous thunderstorms are expected through the remainder of the
afternoon and into the early evening. Prime time for moderate to
strong thunderstorms will until 9:00 PM.
-
Thunderstorms will be efficient rainfall producers very capable of
producing heavy downpours that may lead to excessive runoff and
possibly flash flooding.
STORM RAINFALL POTENTIAL AND DURATION: Weak thunderstorms will produce
0.3-0.8" in 10-30 minutes. Moderate to strong thunderstorms will have
the potential to produce rainfall rates of 0.8-2.0 in 10-30 minutes.
WORST CASE SCENARIO: A large thunderstorm complex or a slower moving
large thunderstorm may result in rainfall rates of 1.0-2.5" in 10-30
minutes and up to 3.5" in 45-75 minutes.
COUNTY
MESSAGE
VALID TIMES
PRIME TIME
the City of Aurora
1
Current TO 1000 PM
Current TO 900 PM
Arapahoe County
1
Current TO 1000 PM
Current TO 900 PM
DIA
1
Current TO 1000 PM
Current TO 900 PM
Denver County
1
Current TO 1000 PM
Current TO 900 PM
Adams County
1
Current TO 1000 PM
Current TO 900 PM
Douglas County
2
Current TO 1000 PM
Current TO 900 PM
Broomfield County
1
Current TO 1000 PM
Current TO 900 PM
Jefferson County
1
Current TO 1000 PM
Current TO 900 PM
Boulder County
2
Current TO 1000 PM
Current TO 900 PM
Lakewood
1
Current TO 1000 PM
Current TO 900 PM
Wheat Ridge
1
Current TO 1000 PM
Current TO 900 PM
Arvada
1
Current TO 1000 PM
Current TO 900 PM
County-specific Quantitative
Precipitation Outlook PRECIPITATION TIME
30-Minute Rainfall
and % Probability Message
Potential
Plains
Â
Â
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Adams
Current TO 1000 PM SUN
0.2" (95%) to 0.8" (70%) to 2.0" (20%)
ISSUED
Arapahoe
Current TO 1000 PM SUN
0.2" (100%) to 0.8" (75%) to 2.0" (30%)
ISSUED
Boulder
Current TO 1000 PM SUN
0.2" (95%) to 0.8" (70%) to 2.0" (20%)
ISSUED
Broomfield
Current TO 1000 PM SUN
0.2" (95%) to 0.8" (70%) to 2.0" (25%)
ISSUED
Denver
Current TO 1000 PM SUN
0.2" (95%) to 0.8" (70%) to 2.0" (20%)
ISSUED
Douglas
Current TO 1000 PM SUN
0.2" (100%) to 0.8" (75%) to 2.0" (30%)
ISSUED
Jefferson
Current TO 1000 PM SUN
0.2" (95%) to 0.8" (70%) to 2.0" (20%)
ISSUED
Foothills above 6500ft
Â
Â
Â
Boulder
Current TO 1000 PM SUN
0.2" (100%) to 0.8" (75%) to 2.0" (25%)
ISSUED
Douglas
Current TO 1000 PM SUN
0.2" (100%) to 0.8" (75%) to 2.0" (30%)
ISSUED
Jefferson
Current TO 1000 PM SUN
0.2" (100%) to 0.8" (75%) to 2.0" (25%)
ISSUED
MONITOR NATIONAL WEATHER SERVICE FOR SEVERE WEATHER STATEMENTS.
MHFD Flood Prediction Center: 303-458-0789 Â Â Â F2P2 Website
[
http://udfcd.org/Flash+Flood+Prediction+Program]