Alert archive / Colorado / Flash Flood Warnings in 2014
Flash Flood Warning 33, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 29, 2014, 5:05 PM MDT for Larimer County, Colorado. It was in force for 6 hr. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 29, 2014, 5:05 PM MDT (23:05 UTC)
- Expired
- Jul 29, 2014, 11:00 PM MDT
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Larimer County, CO
The radar
The Cheyenne radar (KCYS), 60 km from the middle of the area, began a volume at 23:07 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 29, 5:08 PM MDT | FLASH FLOOD | 10 Nnw Wellington, CO | INTERSECTION WASHED OUT AT COUNTY RD 15 AND 84 DUE TO WATER FLOWING OFF OF FIELDS. |
| Jul 29, 5:08 PM MDT | FLASH FLOOD | 10 Nw Wellington, CO | INTERSECTION WASHED OUT AT COUNTY RD 15 AND 84 DUE TO WATER FLOWING OFF OF FIELDS. |
| Jul 29, 5:08 PM MDT | FLASH FLOOD | 9 Nw Wellington, CO | EXTENSIVE FLOODING OF FIELDS WITH STANDING WATER IN FIELDS AND ON COUNTY ROADS. LAW ENFORCMENT NOTED SOME ROAD DAMAGE DUE TO WATER FLOWING OFF OF FIELDS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 11.1 hours before the alert went out and 214 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 11 J/kg
- Mixed-layer CIN
- -207 J/kg
- Mixed-layer LCL
- 1262 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
074
WGUS55 KBOU 292305
FFWBOU
COC069-300500-
/O.NEW.KBOU.FF.W.0033.140729T2305Z-140730T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
505 PM MDT TUE JUL 29 2014
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN LARIMER COUNTY IN NORTH CENTRAL COLORADO...
* UNTIL 1100 PM MDT TUESDAY
* AT 456 PM MDT...DOPPLER RADAR INDICATED ADDITIONAL THUNDERSTORMS
WERE REDEVELOPING OVER NORTHEASTERN LARIMER COUNTY. SATURATED
SOILS ALONG WITH SWOLLEN CREEKS AND STREAMS FROM HEAVY RAINFALL
EARLIER THIS AFTERNOON WILL FURTHER EXACERBATE THE SITUATION.
FLASH FLOODING WILL LIKELY REDEVELOP IN THIS AREA OVER THE NEXT 1
TO 3 HOURS...AS HEAVY RAINFALL ENSUES. EXCESSIVE RAINFALL OVER THE
WARNING AREA WILL CAUSE MUD SLIDES NEAR STEEP TERRAIN. THE MUD
SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE
MATERIALS.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
RED FEATHER LAKES...LIVERMORE AND VIRGINIA DALE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ROCK SLIDES AND DEBRIS FLOWS ARE LIKELY FROM THIS RAINFALL. DRIVERS
SHOULD BE ALERT FOR ROCKS...MUD...OR FLOOD WATERS ON ROADWAYS. PEOPLE
IN AREAS PRONE TO DEBRIS FLOWS SHOULD BE PREPARED TO MOVE TO SAFETY.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. PLEASE REPORT FLOODING TO YOUR LOCAL LAW
ENFORCEMENT AGENCY WHEN YOU CAN DO SO SAFELY.
&&
LAT...LON 4077 10569 4099 10569 4100 10496 4074 10496
$$
COOPER2 follow-up statements
823 WGUS75 KBOU 300145 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 745 PM MDT TUE JUL 29 2014 COC069-300500- /O.CON.KBOU.FF.W.0033.000000T0000Z-140730T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LARIMER CO- 745 PM MDT TUE JUL 29 2014 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 PM MDT FOR NORTHEASTERN LARIMER COUNTY... AT 740 PM MDT...DOPPLER RADAR INDICATED ADDITIONAL SHOWERS AND THUNDERSTORMS WERE CONTINUING TO MOVE ACROSS THE WARNED AREA. ALTHOUGH THE STORMS WERE WEAKER THAN THOSE THAT PRODUCED HEAVY RAIN EARLIER THIS AFTERNOON...THEY MAY STILL ALLOW FOR FLASH FLOODING TO OCCUR ALONG ALREADY SWOLLEN CREEKS AND STREAMS. EXCESSIVE RAINFALL OVER THE WARNING AREA WILL CAUSE MUD SLIDES NEAR STEEP TERRAIN. THE MUD SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... RED FEATHER LAKES...LIVERMORE AND VIRGINIA DALE. PRECAUTIONARY/PREPAREDNESS ACTIONS... DRIVERS SHOULD BE ALERT FOR ROCKS...MUD...OR FLOOD WATERS ON ROADWAYS. PEOPLE IN AREAS PRONE TO DEBRIS FLOWS SHOULD BE PREPARED TO MOVE TO SAFETY. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU CAN DO SO SAFELY. && LAT...LON 4077 10569 4099 10569 4100 10496 4074 10496 $$ COOPER
404 WGUS75 KBOU 300256 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 856 PM MDT TUE JUL 29 2014 COC069-300304- /O.CAN.KBOU.FF.W.0033.000000T0000Z-140730T0500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LARIMER CO- 856 PM MDT TUE JUL 29 2014 ...THE FLASH FLOOD WARNING FOR NORTHEASTERN LARIMER COUNTY IS CANCELLED... THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. ADDITIONAL THUNDERSTORMS HOWEVER MAY MOVE BACK INTO THE REGION LATE TONIGHT AND WEDNESDAY MORNING. LAT...LON 4077 10569 4099 10569 4100 10496 4074 10496 $$ COOPER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 7:20 PM MDT | Areal Flood Advisory | BOU | Weld | 2 hr |
| Jul 28, 10:31 PM MDT | Areal Flood Advisory | BOU | Larimer | 119 min |
| Jul 29, 12:02 PM MDT | Areal Flood Advisory | BOU | Larimer | 88 min |
| Jul 29, 12:20 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jul 29, 12:29 PM MDT | Areal Flood Advisory | BOU | Elbert | 91 min |
| Jul 29, 1:36 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jul 29, 1:48 PM MDT | Areal Flood Advisory | BOU | Arapahoe, Elbert | 3 hr |
| Jul 29, 1:59 PM MDT | Areal Flood Advisory | BOU | Larimer | 2 hr |
| Jul 29, 2:10 PM MDT | Areal Flood Advisory | BOU | Larimer | 3 hr |
| Jul 29, 2:11 PM MDT | Areal Flood Advisory | BOU | Adams, Weld | 3 hr |
| Jul 29, 2:35 PM MDT | Areal Flood Advisory | BOU | Larimer, Weld | 3 hr |
| Jul 29, 2:42 PM MDT | Areal Flood Advisory | BOU | Adams, Denver | 3 hr |
| Jul 29, 2:44 PM MDT | Flash Flood Warning | BOU | Larimer | 6 hr |
| Jul 29, 3:08 PM MDT | Areal Flood Advisory | BOU | Adams, Arapahoe, Denver, Douglas, Jefferson | 3 hr |
| Jul 29, 3:16 PM MDT | Flash Flood Warning | BOU | Larimer, Weld | 3 hr |
| Jul 29, 3:17 PM MDT | Areal Flood Advisory | BOU | Lincoln | 3 hr |
| Jul 29, 3:26 PM MDT | Flash Flood Warning | BOU | Weld | 3 hr |
| Jul 29, 3:33 PM MDT | Areal Flood Advisory | BOU | Morgan | 3 hr |
| Jul 29, 3:43 PM MDT | Areal Flood Advisory | BOU | Weld | 3 hr |
| Jul 29, 4:11 PM MDT | Areal Flood Advisory | BOU | Morgan | 3 hr |
| Jul 29, 4:12 PM MDT | Areal Flood Advisory | BOU | Morgan, Washington, Weld | 3 hr |
| Jul 29, 4:45 PM MDT | Areal Flood Advisory | BOU | Lincoln | 3 hr |
| Jul 29, 5:18 PM MDT | Areal Flood Advisory | BOU | Logan, Washington, Weld | 3 hr |
| Jul 29, 5:55 PM MDT | Areal Flood Advisory | BOU | Elbert, Lincoln | 3 hr |
Nearby
Flash Flood Warnings in Colorado, 2014Every flash flood warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.