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Home Return to list Flash Flood Warning 0030 Issued by the Denver / Boulder Forecast Office
Action: New Issued At: 2026-08-15 15:44:56
694
WGUS55 KBOU 152044
FFWBOU
COC001-005-031-152345-
/O.NEW.KBOU.FF.W.0030.260815T2044Z-260815T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Denver CO
244 PM MDT Sat Aug 15 2026
The National Weather Service in Denver has issued a
* Flash Flood Warning for...
Southwestern Adams County in northeastern Colorado...
Western Arapahoe County in northeastern Colorado...
Eastern Denver County in northeastern Colorado...
* Until 545 PM MDT.
* At 244 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1.5 inches of
rain have fallen. The expected rainfall rate is 1 to 1.5 inches in
15 minutes. Additional rainfall amounts of 0.5 to 1.5 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flash flooding of small creeks and streams, gulches,
roads, and poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Eastern Denver, northwestern Aurora, Buckley SFB.
This includes the following streams and drainages...
Toll Gate Creek, Sand Creek, Cherry Creek, First Creek, East Toll
Gate Creek, West Toll Gate Creek, Murphy Creek, Coal Creek,
Westerly Creek, Third Creek and Second Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
Excessive runoff from this storm will cause flash flooding of small
creeks and streams, highways, streets, underpasses, drainage areas
and other low lying spots.
&&
LAT...LON 3963 10489 3974 10493 3980 10480 3980 10479
3981 10479 3981 10476 3982 10476 3982 10468
3967 10474 3964 10480
PARTITION...408005
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-1.5 INCHES IN 15 MINUTES
$$
20
Action: Continued Issued At: 2026-08-15 16:04:57
213
WGUS75 KBOU 152104
FFSBOU
Flash Flood Statement
National Weather Service Denver CO
304 PM MDT Sat Aug 15 2026
COC001-005-031-152345-
/O.CON.KBOU.FF.W.0030.000000T0000Z-260815T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adams CO-Arapahoe CO-Denver CO-
304 PM MDT Sat Aug 15 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM MDT THIS
AFTERNOON FOR ADAMS, WESTERN ARAPAHOE AND DENVER COUNTIES...
At 304 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain in Water was flowing 1 foot deep at Quincy and Smoky Hill Road.
Between 1.5 and 3 inches of rain have fallen. The expected rainfall
rate is 1.5 to 3 inches in 45 minutes. Additional rainfall amounts up
to 1 inch are possible in the eastern portions of the warned area.
Flash flooding is already occurring.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar indicated.
IMPACT...Life threatening flash flooding of creeks and streams,
roads, and low lying areas.
Some locations that will experience flash flooding include...
Eastern Denver, northwestern Aurora, and Buckley SFB.
This includes the following streams and drainages...
Toll Gate Creek, Sand Creek, Cherry Creek, South Platte River,
First Creek, East Toll Gate Creek, West Toll Gate Creek, Murphy
Creek, Coal Creek, Westerly Creek, Third Creek and Second Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
Excessive runoff from this storm will cause flash flooding of small
creeks and streams, highways, streets, underpasses, drainage areas
and other low lying spots.
&&
LAT...LON 3963 10489 3974 10493 3980 10480 3980 10479
3981 10479 3981 10476 3982 10476 3982 10468
3967 10474 3964 10480
PARTITION...408005
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...1.5-3 INCHES IN 45 MINUTES
$$
20
Action: Continued Issued At: 2026-08-15 16:36:58
241
WGUS75 KBOU 152136
FFSBOU
Flash Flood Statement
National Weather Service Denver CO
336 PM MDT Sat Aug 15 2026
COC001-005-031-152345-
/O.CON.KBOU.FF.W.0030.000000T0000Z-260815T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adams CO-Arapahoe CO-Denver CO-
336 PM MDT Sat Aug 15 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM MDT THIS
AFTERNOON FOR WESTERN ADAMS, WESTERN ARAPAHOE, AND EASTERN DENVER
COUNTIES...
At 336 PM MDT, Broadcast media reported flash flooding was occurring
near Chambers and Iliff, and Mississippi and Havana. Between 1.5 and
3 inches of rain have fallen. Additional rainfall amounts up to 0.2
inches are possible in the warned area. Flash flooding is already
occurring.
HAZARD...Life threatening flash flooding. Heavy rain producing flash
flooding.
SOURCE...Broadcast media reported.
IMPACT...Life threatening flash flooding of creeks and streams,
roads, and low lying areas.
Some locations that will experience flash flooding include...
Eastern Denver, Aurora, and Buckley SFB.
This includes the following streams and drainages...
Toll Gate Creek, Sand Creek, Cherry Creek, South Platte River,
First Creek, East Toll Gate Creek, West Toll Gate Creek, Murphy
Creek, Coal Creek, Westerly Creek, Third Creek and Second Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, dont drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Move to higher ground now. Act quickly to protect your life.
Excessive runoff from this storm will cause flash flooding of small
creeks and streams, highways, streets, underpasses, drainage areas
and other low lying spots.
&&
LAT...LON 3963 10489 3974 10493 3980 10480 3980 10479
3981 10479 3981 10476 3982 10476 3982 10468
3967 10474 3964 10480
PARTITION...408005
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
20
Action: Expired Issued At: 2026-08-15 18:37:32
782
WGUS75 KBOU 152337
FFSBOU
Flash Flood Statement
National Weather Service Denver CO
537 PM MDT Sat Aug 15 2026
COC001-005-031-152347-
/O.EXP.KBOU.FF.W.0030.000000T0000Z-260815T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adams CO-Arapahoe CO-Denver CO-
537 PM MDT Sat Aug 15 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 545 PM MDT THIS AFTERNOON FOR
SOUTHWESTERN ADAMS, NORTHWESTERN ARAPAHOE, AND EASTERN DENVER
COUNTIES...
The heavy rain has ended. Flood waters have receded. Flooding is no
longer expected to pose a threat. Please continue to heed any
remaining closures.
A Flood Watch remains in effect until 1000 PM MDT for portions of
central, east central, north central, and northeast Colorado.
&&
LAT...LON 3963 10489 3974 10493 3980 10480 3980 10479
3981 10479 3981 10476 3982 10476 3982 10468
3967 10474 3964 10480
PARTITION...408005
$$
20
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