Alert archive / Colorado / Flash Flood Warnings in 2013
Flash Flood Warning 13, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 26, 2013, 7:49 PM MDT for Larimer County, Colorado. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 26, 2013, 7:49 PM MDT (01:49 UTC)
- Expired
- Jul 26, 2013, 10:45 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Larimer County, CO
The radar
The Cheyenne radar (KCYS), 67 km from the middle of the area, began a volume at 01:53 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.
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 1.8 hours before the alert went out and 193 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3440 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- -28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
310 WGUS55 KBOU 270149 FFWBOU COC069-270445- /O.NEW.KBOU.FF.W.0013.130727T0149Z-130727T0445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 749 PM MDT FRI JUL 26 2013 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL LARIMER COUNTY IN NORTH CENTRAL COLORADO... * UNTIL 1045 PM MDT * AT 748 PM MDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATED UP TO ONE INCH OF RAIN HAS ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. 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... BUCKHORN MOUNTAIN AND POUDRE PARK. THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...BUCKHORN CREEK... NORTH FORK CACHE LA POUDRE RIVER...CACHE LA POUDRE RIVER...GORDON CREEK AND REDSTONE CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... HEAVY RAINFALL WILL CAUSE FLASH FLOODING OF CREEKS...STREAMS...ROADS AND CULVERTS IN THE HIGH PARK BURN AREA. SOME AREAS AFFECTED INCLUDE RIST CANYON...BUCKHORN CREEK...REDSTONE CANYON...STOVE PRAIRIE...AND GULCHES DRAINING INTO THE POUDRE CANYON ALONG HIGHWAY 14. ROCK SLIDES OR DEBRIS FLOWS CAN ALSO BE EXPECTED ACROSS ROADS IN THE BURN AREA. MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. && LAT...LON 4071 10521 4059 10519 4058 10534 4070 10534 $$ COOPER
2 follow-up statements
993 WGUS75 KBOU 270221 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 821 PM MDT FRI JUL 26 2013 COC069-270445- /O.CON.KBOU.FF.W.0013.000000T0000Z-130727T0445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LARIMER CO- 821 PM MDT FRI JUL 26 2013 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM MDT FOR CENTRAL LARIMER COUNTY... AT 816 PM MDT...DOPPLER RADAR INDICATED THE THUNDERSTORM THAT PRODUCED HEAVY RAIN IN THE WARNED AREA HAD ENDED BUT RUNOFF MAY STILL PRODUCE FLASH FLOODING MAINLY NORTH OF POUDRE PARK. RUNOFF ASSOCIATED WITH EXCESSIVE RAINFALL OVER THE WARNING AREA MAY STILL CAUSE MUD SLIDES NEAR STEEP TERRAIN. THE MUD SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... POUDRE PARK. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY. && LAT...LON 4071 10521 4059 10519 4058 10534 4070 10534 $$ COOPER
977 WGUS75 KBOU 270231 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 831 PM MDT FRI JUL 26 2013 COC069-270241- /O.CAN.KBOU.FF.W.0013.000000T0000Z-130727T0445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LARIMER CO- 831 PM MDT FRI JUL 26 2013 ...THE FLASH FLOOD WARNING FOR CENTRAL LARIMER COUNTY IS CANCELLED... THE HEAVY RAIN HAS ENDED...NO REPORTED OF FLOODING HAVE BEEN RECEIVED AND FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. LAT...LON 4071 10521 4059 10519 4058 10534 4070 10534 $$ COOPER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 6:31 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 44 min |
| Jul 26, 7:17 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan | 28 min |
| Jul 26, 7:31 PM MDT | Special Weather Statement | BOU | Larimer | 44 min |
| Jul 26, 7:31 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 29 min |
| Jul 26, 7:40 PM MDT | Areal Flood Advisory | BOU | Larimer | 2 hr |
| Jul 26, 7:46 PM MDT | Special Weather Statement | BOU | Adams | 29 min |
| Jul 27, 2:11 PM MDT | Special Weather Statement | BOU | Larimer | 34 min |
Nearby
Flash Flood Warnings in Colorado, 2013Every flash flood warning in 2013
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.