M-1 Low Impact Flooding
by f2p2＠udfcd.org
Time: 1112 PM Thu May 11, 2023
Forecaster: Brad Simmons
-------------------------
MESSAGE 1
Flash Flood Prediction Program
-------------------------
**** LOW IMPACT FLOODING ****
PRIORITY DISSEMINATION RECOMMENDED
We have determined that low impact flooding is likely in the following
counties: BROOMFIELD, JEFFERSON, BOULDER (CITY OF BOULDER AFFECTED,
FOUR MILE BURN AREA AFFECTED)
including: LAKEWOOD, WHEAT RIDGE, ARVADA
------------------------------------------------------------------------------
from: Current
to 1000 AM
.
Prime time for flooding: Current
to 800 AM
.
------------------------------------------------------------------------------
Forecast rainfall: Light rain showers will produce rainfall rates of
0.1-0.3" in 60 minutes. Moderate to heavy non-thunderstorm rain
showers will produce rainfall rates of 0.3-0.9" in 60 minutes. Very
heavy rain showers or a weak to moderate thunderstorm has the
potential to produce rainfall amounts of 0.5-1.5" in 30-60 minutes.
------------------------------------------------------------------------------
The most likely areas to be impacted by flooding are:
X
Mountain streams & floodplains; road crossings; canyon roads &
highways; recreational trails; adjacent open space
areas/campgrounds/parks; fishing access points & stream reaches;
buildings near streams; utilities
X
Urban streams/gulches; road crossings; recreational trails; adjacent
open space areas/campgrounds/parks; floodplain properties; utilities
X
Urban streets, intersections, low lying areas, known trouble spots
X
Mountain locations subject to mud/rock/debris slide
------------------------------------------------------------------------------
Additional Information: Excessive runoff is imminent or already
occurring in Boulder County, Jefferson County, Broomfield County,
Arvada, Wheat Ridge, and Lakewood. A saturated ground due to 1.5-4.0"
of rain already observed over a 1-2 day period is resulting in even
light to moderate rain showers resulting in excessive runoff in creeks
and streams. Smaller creeks and streams are already running high and
additional rainfall may exacerbate runoff further and produce
flooding/flash flooding conditions in the District. An additional
1.0-2.5" of rain is likely over the next 5-10 hours.
This message is not intended for public dissemination. Please pass
this information along to affected emergency response organizations
(police, fire, public works, etc.) within your area.
Also, please take appropriate actions to prepare for possible
flooding.
Further information will be provided to you as it becomes available.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
1 year, 7 months
M-2 Flash Flood Watch Update
by f2p2＠udfcd.org
Time: 1055 PM Thu May 11, 2023
Forecaster: Brad Simmons
-------------------------
MESSAGE 2 UPDATE
Flash Flood Prediction Program
-------------------------
FLASH FLOOD WATCH
The National Weather Service previously issued a FLASH FLOOD WATCH
for: the following counties: BOULDER (CITY OF BOULDER AFFECTED, FOUR
MILE BURN AREA AFFECTED), JEFFERSON, BROOMFIELD, DOUGLAS, ADAMS,
DENVER, ARAPAHOE
including: DIA, THE CITY OF AURORA, ARVADA, WHEAT RIDGE, LAKEWOOD
------------------------------------------------------------------------------
from: Current
to 1159 AM
. THE NATIONAL WEATHER SERVICE IN BOULDER HAS ISSUED A FLOOD
WATCH/FLASH FLOOD WATCH FOR THE ENTIRE DISTRICT EFFECTIVE UNTIL NOON
FRIDAY.
Prime time for flooding: Current
to 1159 AM
.
------------------------------------------------------------------------------
Forecast rainfall: Light rain showers will produce rainfall rates of
0.1-0.3" in 60 minutes. Moderate to heavy non-thunderstorm rain
showers will produce rainfall rates of 0.3-0.9" in 60 minutes. Very
heavy rain showers or a weak to moderate thunderstorm has the
potential to produce rainfall amounts of 0.5-1.5" in 30-60 minutes.
------------------------------------------------------------------------------
The most likely areas to be impacted by flooding are:
X
Mountain streams & floodplains; road crossings; canyon roads &
highways; recreational trails; adjacent open space
areas/campgrounds/parks; fishing access points & stream reaches;
buildings near streams; utilities
X
Urban streams/gulches; road crossings; recreational trails; adjacent
open space areas/campgrounds/parks; floodplain properties; utilities
X
Urban streets, intersections, low lying areas, known trouble spots
X
Mountain locations subject to mud/rock/debris slide
------------------------------------------------------------------------------
Additional information: A saturated ground due to 2.0-5.0" of rain
already observed over a 1-2 day period is resulting in even light to
moderate rain showers resulting in excessive runoff in creeks and
streams. Smaller creeks and streams are already running high and
additional rainfall may exacerbate runoff further and produce
flooding/flash flooding conditions in the District. An additional
1.0-3.0" of rain is likely over the next 5-10 hours.
A Flash Flood Watch means that flash flooding is possible within the
watch area.
This message is not intended for public dissemination. Please pass
this information along to affected emergency response organizations
(police, fire, public works, etc.) within your area.
Also, please take appropriate actions to prepare for possible
flooding.
Further information will be provided to you as it becomes available.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
1 year, 7 months
M-2 Flash Flood Watch
by f2p2＠udfcd.org
Time: 606 AM Thu May 11, 2023
Forecaster: Justin Brooks
-------------------------
MESSAGE 2
Flash Flood Prediction Program
-------------------------
FLOOD WATCH
The National Weather Service has issued a FLOOD WATCH for: the
following counties: BOULDER (CITY OF BOULDER AFFECTED, FOUR MILE BURN
AREA AFFECTED), JEFFERSON, BROOMFIELD, DOUGLAS, ADAMS, DENVER,
ARAPAHOE
including: DIA, THE CITY OF AURORA, ARVADA, WHEAT RIDGE, LAKEWOOD
------------------------------------------------------------------------------
from: Current
to 600 AM
. THE NATIONAL WEATHER SERVICE IN BOULDER HAS ISSUED A FLOOD WATCH FOR
THE ENTIRE DISTRICT EFFECTIVE FROM 6:00 AM THURSDAY, MAY 6TH 2023,
UNTIL 6:00 AM FRIDAY, MAY, 2023.
Prime time for flooding: Current
to 600 AM
.
------------------------------------------------------------------------------
Forecast rainfall: Moderate to strong thunderstorms will have the
potential to produce heavy rainfall rates of 0.5-1.5" in 10-30
minutes. A nearly stationary thunderstorm or large thunderstorm
complex may produce up to 3.0" of heavy rain in 45-60 minutes.
------------------------------------------------------------------------------
The most likely areas to be impacted by flooding are:
X
Mountain streams & floodplains; road crossings; canyon roads &
highways; recreational trails; adjacent open space
areas/campgrounds/parks; fishing access points & stream reaches;
buildings near streams; utilities
X
Urban streams/gulches; road crossings; recreational trails; adjacent
open space areas/campgrounds/parks; floodplain properties; utilities
X
Urban streets, intersections, low lying areas, known trouble spots
X
Mountain locations subject to mud/rock/debris slide
------------------------------------------------------------------------------
Additional information: Excessive runoff roadways is likely to develop
over the District today, this evening and through the overnight
tonight with Flash flooding of watercourses possible today should a
stronger thunderstorm be observed.
A Flood Watch means that flooding is possible within the watch area.
This message is not intended for public dissemination. Please pass
this information along to affected emergency response organizations
(police, fire, public works, etc.) within your area.
Also, please take appropriate actions to prepare for possible
flooding.
Further information will be provided to you as it becomes available.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
1 year, 7 months
M-1 Street Flooding Potential Update
by f2p2＠udfcd.org
Time: 1139 PM Wed May 10, 2023
Forecaster: Brad Simmons
-------------------------
MESSAGE 1 UPDATE
Flash Flood Prediction Program
-------------------------
STREET FLOODING POTENTIAL
We previously determined that street and small stream flooding is
possible in the following counties: BOULDER (CITY OF BOULDER AFFECTED,
FOUR MILE BURN AREA AFFECTED), JEFFERSON, BROOMFIELD, DOUGLAS, ADAMS,
DENVER, ARAPAHOE
including: DIA, THE CITY OF AURORA, ARVADA, WHEAT RIDGE, LAKEWOOD
------------------------------------------------------------------------------
from: Current
to 200 AM
.
Prime time for flooding: Current
to 130 AM
.
------------------------------------------------------------------------------
Forecast rainfall: Rain showers will produce rainfall rates of
0.1-0.4" in 30-60 minutes. A weak to moderate thunderstorm will have
the potential to produce rainfall rates of 0.3-0.9" in 10-30 minutes.
------------------------------------------------------------------------------
The most likely areas to be impacted by flooding are:
X
Mountain streams & floodplains; road crossings; canyon roads &
highways; recreational trails; adjacent open space
areas/campgrounds/parks; fishing access points & stream reaches;
buildings near streams; utilities
X
Urban streams/gulches; road crossings; recreational trails; adjacent
open space areas/campgrounds/parks; floodplain properties; utilities
X
Urban streets, intersections, low lying areas, known trouble spots
X
Mountain locations subject to mud/rock/debris slide
------------------------------------------------------------------------------
Additional Information: Message 1's have been extended until 2:00 AM
Thursday and may be extended further. Smaller creeks and streams are
on the rise and will be running high overnight due to a widespread
rain and the ground is becoming saturated.
This message is not intended for public dissemination. Please pass
this information along to affected emergency response organizations
(police, fire, public works, etc.) within your area.
Also, please take appropriate actions to prepare for possible
flooding.
Further information will be provided to you as it becomes available.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
1 year, 7 months
M-1 Street Flooding Potential
by f2p2＠udfcd.org
Time: 1252 PM Wed May 10, 2023
Forecaster: Justin Brooks
-------------------------
MESSAGE 1
Flash Flood Prediction Program
-------------------------
STREET FLOODING POTENTIAL
We have determined that street and small stream flooding is possible
in the following counties: ARAPAHOE, DENVER, ADAMS, DOUGLAS,
BROOMFIELD, JEFFERSON, BOULDER (CITY OF BOULDER AFFECTED, FOUR MILE
BURN AREA AFFECTED)
including: DIA, THE CITY OF AURORA, ARVADA, WHEAT RIDGE, LAKEWOOD
------------------------------------------------------------------------------
from: 100 PM
to 1159 AM
.
Prime time for flooding: 200 PM
to 1100 PM
.
------------------------------------------------------------------------------
Forecast rainfall: Moderate to strong thunderstorms will have the
potential to produce rainfall rates of
0.5-1.0" in 10-30 minutes. Training of thunderstorm cells or a slower
moving thunderstorm may result
in up to 2.0" of rain in 60 minutes or less.
------------------------------------------------------------------------------
The most likely areas to be impacted by flooding are:
X
Mountain streams & floodplains; road crossings; canyon roads &
highways; recreational trails; adjacent open space
areas/campgrounds/parks; fishing access points & stream reaches;
buildings near streams; utilities
X
Urban streams/gulches; road crossings; recreational trails; adjacent
open space areas/campgrounds/parks; floodplain properties; utilities
X
Urban streets, intersections, low lying areas, known trouble spots
X
Mountain locations subject to mud/rock/debris slide
------------------------------------------------------------------------------
Additional Information: Strong thunderstorms may also contain large
hail, gusty winds and frequent cloud-to-ground lightning.
This message is not intended for public dissemination. Please pass
this information along to affected emergency response organizations
(police, fire, public works, etc.) within your area.
Also, please take appropriate actions to prepare for possible
flooding.
Further information will be provided to you as it becomes available.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
1 year, 7 months
M-1 Street Flooding Potential
by f2p2＠udfcd.org
Time: 539 PM Tue May 9, 2023
Forecaster: Justin Brooks
-------------------------
MESSAGE 1
Flash Flood Prediction Program
-------------------------
STREET FLOODING POTENTIAL
We have determined that street and small stream flooding is possible
in the following counties: BOULDER (CITY OF BOULDER AFFECTED, FOUR
MILE BURN AREA AFFECTED), JEFFERSON, BROOMFIELD, DOUGLAS, ADAMS,
DENVER, ARAPAHOE
including: DIA, THE CITY OF AURORA, ARVADA, WHEAT RIDGE, LAKEWOOD
------------------------------------------------------------------------------
from: Current
to 200 AM
.
Prime time for flooding: Current
to 1159 PM
.
------------------------------------------------------------------------------
Forecast rainfall: Moderate to strong thunderstorms will have the
potential to produce rainfall rates of
0.4-0.8" in 10-30 minutes. Training of thunderstorm cells or a slower
moving thunderstorm may result
in up to 1.5" of rain in 60 minutes or less.
------------------------------------------------------------------------------
The most likely areas to be impacted by flooding are:
X
Mountain streams & floodplains; road crossings; canyon roads &
highways; recreational trails; adjacent open space
areas/campgrounds/parks; fishing access points & stream reaches;
buildings near streams; utilities
X
Urban streams/gulches; road crossings; recreational trails; adjacent
open space areas/campgrounds/parks; floodplain properties; utilities
X
Urban streets, intersections, low lying areas, known trouble spots
X
Mountain locations subject to mud/rock/debris slide
------------------------------------------------------------------------------
Additional Information: Strong thunderstorms may also contain large
hail, gusty winds and frequent cloud-to-ground lightning.
This message is not intended for public dissemination. Please pass
this information along to affected emergency response organizations
(police, fire, public works, etc.) within your area.
Also, please take appropriate actions to prepare for possible
flooding.
Further information will be provided to you as it becomes available.
MHFD Flood Prediction Center: 303-458-0789 F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
1 year, 7 months