Alert archive / Colorado / Flash Flood Warnings in 2001
Flash Flood Warning 1, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jun 7, 2001, 9:18 PM MDT for Weld County, Colorado. It was in force for 117 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
- Jun 7, 2001, 9:18 PM MDT (03:18 UTC)
- Expired
- Jun 7, 2001, 11:15 PM MDT
- In force
- 117 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Weld County, CO
The radar
The Cheyenne radar (KCYS), 90 km from the middle of the area, began a volume at 03:20 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 00:00Z, 3.3 hours before the alert went out and 109 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
- 1603 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 1210 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- -56 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS55 KBOU 080320 FFWBOU COC123-080515- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 918 PM MDT THU JUN 7 2001 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL WELD COUNTY IN NORTHEAST COLORADO * UNTIL 1115 PM MDT * AT 918 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN 7 MILES SOUTHEAST OF PAWNEE BUTTES...OR ABOUT 32 MILES NORTH OF FORT MORGAN. THE STORMS PRODUCING THE HEAVY RAIN WERE MOVING SOUTH AT 10 MPH. RADAR INDICATES UP TO 3 INCHES OF RAIN HAS OCCURRED IN THE LAST HOUR NEAR PAWNEE BUTTES. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...KEOTA... NEW RAYMER...PAWNEE BUTTES AND STONEHAM. 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 SMALL CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. LAT...LON 4082 10409 4054 10410 4054 10362 4081 10363 KLEYLA
2 follow-up statements
000 WGUS55 KBOU 080431 FFSDEN COC123-080515- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1030 PM MDT THU JUN 7 2001 ...FLASH FLOOD WARNING... THE NATIONAL WEATHER SERVICE IN DENVER HAS CONTINUED A FLASH FLOOD WARNING FOR EAST CENTRAL WELD COUNTY IN NORTHEAST COLORADO UNTIL 1115 PM MDT THIS EVENING. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...KEOTA...NEW RAYMER...PAWNEE BUTTES AND STONEHAM. AT 1020 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE THUNDERSTORM PRODUCING THE HEAVY RAIN OVER EAST CENTRAL WELD COUNTY WAS GRADUALLY WEAKENING AND MOVING SLOWLY TO THE SOUTHEAST INTO NORTHERN MORGAN COUNTY. AT 1013 PM MDT A STORM SPOTTER LOCATED 25 MILES NORTH OF NEW RAYMER REPORTED TOTAL RAINFALL FROM THE STORM OF 1.80 INCHES. 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 SMALL CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. LAT...LON 4082 10409 4054 10410 4054 10362 4081 10363 GARD...WFO BOULDER
000 WGUS55 KBOU 080517 FFSDEN COC123-080530- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1115 PM MDT THU JUN 7 2001 ...FLASH FLOOD WARNING EXPIRES... THE NATIONAL WEATHER SERVICE IN DENVER HAS ALLOWED THE FLASH FLOOD WARNING FOR EAST CENTRAL WELD COUNTY IN NORTHEAST COLORADO TO EXPIRE AT 1115 PM MDT THIS EVENING. AT 1110 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE THUNDERSTORM PRODUCING THE HEAVY RAIN OVER EAST CENTRAL WELD COUNTY HAD WEAKENED AND MOVED TO THE SOUTHEAST INTO MORGAN COUNTY. THE ONLY FLOODING REPORTED WAS SOME ROAD FLOODING NEAR HEREFORD COLORADO. LAT...LON 4082 10409 4054 10410 4054 10362 4081 10363 GARD...WFO BOULDER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 6:11 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 49 min |
| Jun 7, 6:14 PM MDT | Tornado Warning | BOU | Washington | 31 min |
| Jun 7, 6:24 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 51 min |
| Jun 7, 7:19 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 41 min |
| Jun 8, 12:56 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 34 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.