M-1 Low Impact Flooding
by f2p2＠udfcd.org
Time: 339 PM Sat July 31, 2021
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 BOULDER
COUNTY (CITY OF BOULDER AFFECTED, FOUR MILE BURN AREA NOT AFFECTED)
including:
------------------------------------------------------------------------------
from: Current
to 530 PM
.
Prime time for flooding: Current
to 500 PM
.
------------------------------------------------------------------------------
Forecast rainfall: Rain showers and weak to moderate thunderstorms
will have the potential to produce 0.5-1.5" of heavy rain in 10-30
minutes. A nearly stationary moderate to strong thunderstorm will have
the potential to produce up to 3.0" in 60-90 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 over Boulder County, including the City of Boulder.
Thunderstorms may also contain 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 Â Â Â F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
3 years, 3 months
M-3 Flash Flood Warning
by f2p2＠udfcd.org
Time: 1027 PM Fri July 30, 2021
Forecaster: Brad Simmons
-------------------------
MESSAGE 3
Flash Flood Prediction Program
-------------------------
FLASH FLOOD WARNING
PRIORITY DISSEMINATION RECOMMENDED
The National Weather Service has issued a FLASH FLOOD WARNING for the
following counties: BROOMFIELD, BOULDER (CITY OF BOULDER NOT AFFECTED,
FOUR MILE BURN AREA NOT AFFECTED)
including:
------------------------------------------------------------------------------
from: Current
to 130 AM
. NWS FLASH FLOOD WARNING ISSUED UNTIL 1:30AM SATURDAY FOR SE BOULDER
COUNTY AND BROOMFIELD COUNTY.
Prime time for flooding: Current
to 1159 PM
.
------------------------------------------------------------------------------
Forecast rainfall: This storm has already produced in excess of
2.5-3.5" of rain with up to another 0.5-1.0" possible as rainfall
rates slowly back off over the next 45-90 minutes.
------------------------------------------------------------------------------
The most likely areas to be impacted by flooding are:
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
------------------------------------------------------------------------------
Additional explanation: Excessive runoff and flash flooding from heavy
rainfall is imminent or already occurring.
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 Â Â Â F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
3 years, 3 months
M-1 Low Impact Flooding
by f2p2＠udfcd.org
Time: 828 PM Fri July 30, 2021
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 BOULDER
COUNTY (CITY OF BOULDER AFFECTED, FOUR MILE BURN AREA NOT AFFECTED)
including:
------------------------------------------------------------------------------
from: Current
to 1000 PM
.
Prime time for flooding: Current
to 945 PM
.
------------------------------------------------------------------------------
Forecast rainfall: Moderate to strong thunderstorms will have the
potential to produce 0.5-1.5" of heavy rain in 10-30 minutes. A nearly
stationary strong thunderstorm will have the potential to produce up
to 3.0" in 60-90 minutes.
------------------------------------------------------------------------------
The most likely areas to be impacted by flooding are:
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
------------------------------------------------------------------------------
Additional Information: Excessive runoff is imminent or already
occurring over far SE Boulder County in the Lafayette and Erie areas
as a persistent storm continues to produce heavy rainfall over a small
area. 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 Â Â Â F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
3 years, 3 months
M-2 Flash Flood Watch
by f2p2＠udfcd.org
Time: 558 PM Fri July 30, 2021
Forecaster: Brad Simmons
-------------------------
MESSAGE 2
Flash Flood Prediction Program
-------------------------
FLASH FLOOD WATCH
The National Weather Service has issued a FLASH FLOOD WATCH for: 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: 600 PM
to 900 PM SATURDAY
. THE NATIONAL WEATHER SERVICE IN BOULDER HAS ISSUED A FLASH FLOOD
WATCH FOR ALL AREAS OF THE DISTRICT AND IS VALID FROM 600 PM THIS
EVENING UNTIL 900 PM TOMORROW NIGHT(7/31/2021).
Prime time for flooding: Current
to 900 PM SATURDAY
.
------------------------------------------------------------------------------
Forecast rainfall: Moderate to strong thunderstorms will have the
potential to produce 0.6-1.8" of heavy rain in 10-30 minutes. A strong
slow moving thunderstorm will have the potential to produce up to 3.5"
in 45-60 minutes. Storms that persist beyond 60 minutes may produce
locally higher amounts.
------------------------------------------------------------------------------
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, damaging winds and frequent cloud-to-ground lightning.
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 Â Â Â F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
3 years, 3 months
M-1 Low Impact Flooding
by f2p2＠udfcd.org
Time: 549 PM Fri July 30, 2021
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 BOULDER
COUNTY (CITY OF BOULDER AFFECTED, FOUR MILE BURN AREA AFFECTED)
including:
------------------------------------------------------------------------------
from: Current
to 730 PM
.
Prime time for flooding: Current
to 700 PM
.
------------------------------------------------------------------------------
Forecast rainfall: Moderate to strong thunderstorms will have the
potential to produce 0.6-1.8" of heavy rain in 10-30 minutes. A nearly
stationary strong thunderstorm will have the potential to produce up
to 3.5" in 45-75 minutes.
------------------------------------------------------------------------------
The most likely areas to be impacted by flooding are:
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
------------------------------------------------------------------------------
Additional Information: Excessive runoff is imminent or already
occurring over portions of SE Boulder County in the Lafayette and Erie
areas. 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 Â Â Â F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
3 years, 3 months
M-1 Street Flooding Potential
by f2p2＠udfcd.org
Time: 442 PM Fri July 30, 2021
Forecaster: Brad Simmons
-------------------------
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 600 PM
.
Prime time for flooding: 500 PM
to 600 PM
.
------------------------------------------------------------------------------
Forecast rainfall: Moderate to strong thunderstorms will have the
potential to produce 0.6-1.8" of heavy rain in 10-30 minutes. A strong
thunderstorm will have the potential to produce up to 3.5" 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: Message 1's will be upgraded at 6:00 PM to
Message 2/NWS Flash Flood Watch from 6:00 PM today until 9:00 PM
Saturday July 31, 2021. 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 Â Â Â F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
3 years, 3 months
M-1 Street Flooding Potential
by f2p2＠udfcd.org
Time: 646 PM Thu July 29, 2021
Forecaster: Brad Simmons
-------------------------
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, ADAMS
including: ARVADA, WHEAT RIDGE, LAKEWOOD
------------------------------------------------------------------------------
from: Current
to 1000 PM
.
Prime time for flooding: Current
to 900 PM
.
------------------------------------------------------------------------------
Forecast rainfall: Moderate to strong thunderstorms will have the
potential to produce 0.4-1.2" of rain in 10-30 minutes. A stationary
strong thunderstorm will have the potential to produce up to 2.5" in
45-75 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: 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 Â Â Â F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
3 years, 3 months
M-1 Low Impact Flooding
by f2p2＠udfcd.org
Time: 649 PM Sun July 25, 2021
Forecaster: Justin Brooks
-------------------------
MESSAGE 1
Flash Flood Prediction Program
-------------------------
LOW IMPACT FLOODING
PRIORITY DISSEMINATION RECOMMENDED
We have determined that low impact flooding is likely in BOULDER
COUNTY (CITY OF BOULDER AFFECTED, FOUR MILE BURN AREA AFFECTED)
including:
------------------------------------------------------------------------------
from: Current
to 830 PM
.
Prime time for flooding: Current
to 800 PM
.
------------------------------------------------------------------------------
Forecast rainfall: Moderate thunderstorms will have the potential to
produce 0.2-0.8" of rain in 10-30 minutes. A strong thunderstorm will
have the potential to produce 0.4-1.5" 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: 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 Â Â Â F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
3 years, 3 months
M-1 Street Flooding Potential
by f2p2＠udfcd.org
Time: 618 PM Sun July 25, 2021
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: WHEAT RIDGE, ARVADA, THE CITY OF AURORA, DIA, LAKEWOOD
------------------------------------------------------------------------------
from: Current
to 900 PM
.
Prime time for flooding: Current
to 830 PM
.
------------------------------------------------------------------------------
Forecast rainfall: Moderate thunderstorms will have the potential to
produce 0.2-0.6" of rain in 10-30 minutes. A strong thunderstorm will
have the potential to produce 0.4-1.2" 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: 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 Â Â Â F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
3 years, 3 months
M-1 Street Flooding Potential Update
by f2p2＠udfcd.org
Time: 949 PM Fri July 23, 2021
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: ADAMS, DOUGLAS, BROOMFIELD,
JEFFERSON, BOULDER (CITY OF BOULDER AFFECTED, FOUR MILE BURN AREA
AFFECTED), DENVER, ARAPAHOE
including: DIA, THE CITY OF AURORA, ARVADA, WHEAT RIDGE, LAKEWOOD
------------------------------------------------------------------------------
from: Current
to 1159 PM
.
Prime time for flooding: Current
to 1130 PM
.
------------------------------------------------------------------------------
Forecast rainfall: Rain showers will produce 0.1-0.3" in 30-60
minutes. Weak to moderate thunderstorms will have the potential to
produce rainfall rates of 0.3-0.8" 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: If a briefly strong thunderstorm is able to
develop it will have the potential to produce 0.4-1.2" in
10-30minutes.
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 Â Â Â F2P2 Website
[http://udfcd.org/Flash+Flood+Prediction+Program]
3 years, 3 months