Alert archive / Colorado / Flash Flood Warnings in 2004
Flash Flood Warning 33, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Aug 18, 2004, 1:02 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
- Aug 18, 2004, 1:02 PM MDT (19:02 UTC)
- Expired
- Aug 18, 2004, 4:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Counties, with a storm outline in the text
County Larimer County, CO
The radar
The Cheyenne radar (KCYS), 88 km from the middle of the area, began a volume at 19:06 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, 7.0 hours before the alert went out and 203 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
- 2142 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 18 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 181905 FFWBOU COC069-182200- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 102 PM MDT WED AUG 18 2004 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL LARIMER COUNTY IN NORTH CENTRAL COLORADO * UNTIL 400 PM MDT * AT 102 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN 6 MILES NORTHWEST OF GLEN HAVEN...OR ABOUT 21 MILES WEST OF FORT COLLINS. THE STORM PRODUCING THE HEAVY RAIN WAS NEARLY STATIONARY. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...GLEN HAVEN. DOPPLER RADAR ESTIMATED 2 INCHES OF RAIN HAD FALLEN IN THE WARNING AREA IN JUST UNDER AN HOUR. BUCKHORN CREEK AND BOX PRARIE CREEK WILL BE AFFECTED BY THE FLOODING. 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 4061 10552 4045 10561 4043 10537 4057 10524 $$ ENTREKIN
1 follow-up statement
000 WGUS75 KBOU 182055 FFSBOU COC069-182200- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 254 PM MDT WED AUG 18 2004 A FLASH FLOOD WARNING REMAINS IN EFFECT FOR CENTRAL LARIMER COUNTY UNTIL 400 PM MDT. AT 236 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN CONTINUES 3 MILES NORTH OF GLEN HAVEN. THE SHOWERS OVER THE WARNING AREA HAVE MOVED VERY LITTLE IN THE PAST SEVERAL HOURS. LOCATIONS REMAINING IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...GLEN HAVEN. DOPPLER RADAR ESTIMATED IN UPWARDS OF 3 INCHES OF RAIN HAD FALLEN ABOUT 5 MILES NORTHWEST OF GLEN HAVEN. COUNTY OFFICIALS REPORTED HAVE REPORTED ROADS FLOODED ALONG MILLER FORK AND DUNRAVEN GLADE...JUST NORTH OF GLEN HAVEN. BUCKHORN CREEK...CASCADE CREEK AND NORTH FORK CREEK WILL ALSO BE SUSCEPTIBLE TO FLASH FLOODING. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. LAT...LON 4061 10552 4045 10561 4043 10537 4057 10524 $$ ENTREKIN
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 1:42 PM MDT | Flash Flood Warning | BOU | Douglas | 3 hr |
| Aug 18, 3:08 PM MDT | Flash Flood Warning | BOU | Boulder | 3 hr |
| Aug 18, 3:32 PM MDT | Flash Flood Warning | BOU | Jefferson | 4 hr |
| Aug 18, 4:01 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Aug 18, 4:12 PM MDT | Flash Flood Warning | BOU | Denver | 3 hr |
| Aug 18, 4:30 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 45 min |
| Aug 18, 4:57 PM MDT | Flash Flood Warning | BOU | Arapahoe, Douglas | 3 hr |
| Aug 18, 5:15 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 45 min |
| Aug 18, 5:33 PM MDT | Flash Flood Warning | BOU | Douglas | 3 hr |
Nearby
Flash Flood Warnings in Colorado, 2004Every flash flood warning in 2004
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.