Alert archive / Colorado / Flash Flood Warnings in 2001
Flash Flood Warning 9, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 10, 2001, 5:46 PM MDT for Clear Creek County, Colorado. It was in force for 119 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jul 10, 2001, 5:46 PM MDT (23:46 UTC)
- Expired
- Jul 10, 2001, 7:45 PM MDT
- In force
- 119 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Clear Creek County, CO
The radar
The Denver radar (KFTG), 85 km from the middle of the area, began a volume at 23:47 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 (KDNR), launched 12:00Z, 11.8 hours before the alert went out and 197 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
- 34 J/kg
- Mixed-layer CIN
- -359 J/kg
- Mixed-layer LCL
- 1557 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -65 m²/s²
- 0-3 km storm-relative helicity
- -16 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 102349 FFWBOU COC019-110145- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 546 PM MDT TUE JUL 10 2001 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHEASTERN CLEAR CREEK COUNTY IN CENTRAL COLORADO * UNTIL 745 PM MDT * AT 546 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN OVER EXTREME SOUTHEASTERN CLEAR CREEK COUNTY...OR ABOUT 28 MILES WEST OF DENVER. THE STORM PRODUCING THE HEAVY RAIN WAS MOVING VERY LITTLE DURING THE PAST HOUR. THE MOUNT EVANS STATE WILDLIFE AREA...EAST OF MOUNT EVANS AND CREEKS RUNNING INTO BEAR CREEK WILL BE AFFECTED BY THE WARNING. RADAR HAS ESTIMATED IN EXCESS OF 3 INCHES OF RAIN DURING THE PAST HOUR. FURTHER STORMS ARE BUILDING TO THE WEST NEAR MOUNT EVANS AS WELL. 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. IF YOUR VEHICLE STALLS ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN. LAT...LON 3962 10558 3954 10555 3956 10540 3965 10545 SWE
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 6:27 PM MDT | Flash Flood Warning | BOU | Arapahoe | 2 hr |
| Jul 9, 6:36 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 39 min |
| Jul 9, 8:00 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 45 min |
| Jul 9, 8:17 PM MDT | Tornado Warning | BOU | Morgan | 43 min |
| Jul 9, 8:39 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 51 min |
| Jul 9, 8:46 PM MDT | Tornado Warning | BOU | Morgan, Washington | 29 min |
| Jul 9, 9:39 PM MDT | Flash Flood Warning | BOU | Morgan | 2 hr |
| Jul 10, 4:03 AM MDT | Severe Thunderstorm Warning | BOU | Phillips | 27 min |
| Jul 10, 4:46 PM MDT | Severe Thunderstorm Warning | BOU | Clear Creek | 29 min |
Nearby
Flash Flood Warnings in Colorado, 2001Every flash flood warning in 2001
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.