Alert archive / Colorado / Flash Flood Warnings in 2001
Flash Flood Warning 7, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 9, 2001, 6:27 PM MDT for Arapahoe County, Colorado. It was in force for 2 hr. 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 9, 2001, 6:27 PM MDT (00:27 UTC)
- Expired
- Jul 9, 2001, 8:30 PM MDT
- In force
- 2 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Arapahoe County, CO
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 0.5 hours before the alert went out and 52 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
- 323 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 2587 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 8 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 100030 FFWDEN COC005-100230- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 627 PM MDT MON JUL 9 2001 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL ARAPAHOE COUNTY IN NORTHEAST COLORADO * UNTIL 830 PM MDT * AT 627 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN CONTINUES OVER JOLLY RANCH...OR ABOUT 25 MILES NORTH OF LIMON. THE STORM PRODUCING THE HEAVY RAIN HAS MOVED VERY LITTLE IN THE PAST HOUR. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...JOLLY RANCH. THIS FLASH FLOOD WARNING REPLACES THE EARLIER SMALL STREAM FLOOD ADVISORY. DOPPLER RADAR INDICATED IN EXCESS OF 4 INCHES MAY HAVE FALLEN IN THE JOLLY RANCH AREA. NO GROUND TRUTH HAS BEEN OBTAINED TO VERIFY RAINFALL. 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. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. LAT...LON 3967 10379 3960 10379 3959 10371 3967 10371 SWE
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 6:36 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 |
| Jul 10, 5:46 PM MDT | Flash Flood Warning | BOU | Clear Creek | 119 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.