Alert archive / Colorado / Flash Flood Warnings in 2007
Flash Flood Warning 13, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 25, 2007, 3:29 PM MDT for Grand 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 counties it named.
The facts
- Issued
- Jul 25, 2007, 3:29 PM MDT (21:29 UTC)
- Expired
- Jul 25, 2007, 6:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Grand County, CO
The radar
The Denver radar (KFTG), 139 km from the middle of the area, began a volume at 21:32 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
Grand Junction, CO (KGJT), launched 12:00Z, 9.5 hours before the alert went out and 231 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
- 452 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 1901 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS55 KBOU 252129 FFWBOU COC049-260030- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 329 PM MDT WED JUL 25 2007 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL GRAND COUNTY IN NORTH CENTRAL COLORADO * UNTIL 630 PM MDT * AT 329 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM 2 MILES NORTHWEST OF HOT SULPHUR SPRINGS...OR ABOUT 64 MILES SOUTHWEST OF FORT COLLINS. THIS STORM WAS NEARLY STATIONARY. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PARSHALL AND HOT SULPHUR SPRINGS. DOPPLER RADAR ESTIMATES THAT RAIN WAS FALLING AT THE RATE OF 2 TO 3 INCHES PER HOUR. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. TURN AROUND...DO NOT DROWN. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER ROCK SLIDES OR MUD FLOWS IN STEEP TERRAIN. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY AS THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. TURN AROUND...DO NOT DROWN. LAT...LON 4001 10612 4014 10607 4017 10615 4006 10627 $$ BARJENBRUCH
2 follow-up statements
000 WGUS75 KBOU 252206 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 402 PM MDT WED JUL 25 2007 COC049-260030- GRAND CO- 402 PM MDT WED JUL 25 2007 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MDT FOR CENTRAL GRAND COUNTY... AT 402 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE VERY HEAVY RAIN CENTERED ABOUT 3 MILES NORTHWEST OF HOT SULPHUR SPRINGS HAD DIMINISHED TO LIGHT RAIN. RADAR INDICATED THIS STORM HAD EARLIER PRODUCED A TOTAL OF 2 TO 3 INCHES OF RAINFALL IN LESS THAN AN HOUR. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PARSHALL AND HOT SULPHUR SPRINGS. STREAMS THAT ARE ESPECIALLY SUSCEPTIBLE TO FLASH FLOODING INCLUDE...SMITH CREEK...UTE BILL CREEK...AND CORRAL CREEK. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER ROCK SLIDES OR MUD FLOWS IN STEEP TERRAIN. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY AS THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. TURN AROUND...DO NOT DROWN. LAT...LON 4001 10612 4014 10607 4017 10615 4006 10627 $$ BARJENBRUCH
000 WGUS75 KBOU 252324 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 522 PM MDT WED JUL 25 2007 COC049-252332- GRAND CO- 522 PM MDT WED JUL 25 2007 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL GRAND COUNTY... THE STORM THAT PRODUCED THE VERY HEAVY RAIN NORTHWEST OF HOT SULPHUR SPRINGS EARLIER THIS EVENING HAS ENDED. THE GRAND COUNTY SHERIFF REPORTED NO FLOODING TROUBLES. LAT...LON 4001 10612 4014 10607 4017 10615 4006 10627 $$ BARJENBRUCH
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 3:13 PM MDT | Severe Thunderstorm Warning | BOU | Grand | 22 min |
| Jul 25, 4:48 PM MDT | Severe Thunderstorm Warning | BOU | Boulder, Broomfield, Jefferson | 25 min |
| Jul 25, 4:57 PM MDT | Flash Flood Warning | BOU | Park | 3 hr |
| Jul 25, 5:06 PM MDT | Flash Flood Warning | BOU | Douglas | 3 hr |
Nearby
Flash Flood Warnings in Colorado, 2007Every flash flood warning in 2007
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.