Alert archive / Colorado / Flash Flood Warnings in 2004
Flash Flood Warning 34, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Aug 18, 2004, 1:42 PM MDT for Douglas 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, 1:42 PM MDT (19:42 UTC)
- Expired
- Aug 18, 2004, 4:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Counties, with a storm outline in the text
County Douglas County, CO
The radar
The Denver radar (KFTG), 86 km from the middle of the area, began a volume at 19:45 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, 7.7 hours before the alert went out and 184 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 181942 FFWBOU COC035-182230- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 142 PM MDT WED AUG 18 2004 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR THE HAYMAN BURN AREA IN SOUTHWESTERN DOUGLAS COUNTY IN NORTHEAST COLORADO * UNTIL 430 PM MDT * AT 136 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN OVER WESTCREEK...OR ABOUT 30 MILES NORTHWEST OF COLORADO SPRINGS. THE STORM PRODUCING THE HEAVY RAIN WAS NEARLY STATIONARY. THUNDERSTORMS OVER THE AREA WILL CONTINUE TO PRODUCE VERY HEAVY RAIN OVER AND UPSTREAM OF THE WESTCREEK AREA. RAINFALL AMOUNTS UP TO TWO INCHES AN HOUR ARE POSSIBLE WITH THESE STORMS. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO... WESTCREEK. HEAVY RAINFALL WILL CAUSE FLASH FLOODING OF SMALL CREEKS...STREAMS... AND DITCHES IN THE HAYMAN FIRE BURN AREA. SOME DRAINAGE BASINS AFFECTED BY EXCESSIVE RUNOFF INCLUDE FOURMILE CREEK...TRAIL CREEK...TURKEY CREEK...WEST CREEK...AND OTHER TRIBUTARIES OF THE SOUTH PLATTE RIVER. MUD AND ASH FLOWS CAN ALSO BE EXPECTED ACROSS RURAL ROADS. 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. LAT...LON 3922 10515 3925 10522 3914 10531 3914 10512 $$ TH
3 follow-up statements
000 WGUS75 KBOU 182057 FFSBOU COC035-182230- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 255 PM MDT WED AUG 18 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE HAYMAN BURN AREA IN SOUTHWESTERN DOUGLAS COUNTY UNTIL 430 PM MDT... AT 255 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE HEAVY RAIN OVER WESTCREEK HAD ENDED. HOWEVER...ANOTHER STORM PRODUCING TORRENTIAL RAIN IN TELLER COUNTY WILL PRODUCE FLASH FLOODING ALONG WEST CREEK AND TRAIL CREEK THROUGH 430 PM. RAINFALL AMOUNTS UP TO TWO INCHES AN HOUR ARE POSSIBLE WITH THESE STORMS. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO... WESTCREEK. HEAVY RAINFALL WILL CAUSE FLASH FLOODING OF SMALL CREEKS...STREAMS... AND DITCHES IN THE HAYMAN FIRE BURN AREA. MUD AND ASH FLOWS CAN ALSO BE EXPECTED ACROSS RURAL ROADS. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. LAT...LON 3922 10515 3925 10522 3914 10531 3914 10512 $$ BARJENBRUCH
000 WGUS75 KBOU 182229 FFSBOU COC035-182230- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 430 PM MDT WED AUG 18 2004 ...THE FLASH FLOOD WARNING FOR THE DOUGLAS COUNTY PORTION OF THE HAYMAN BURN AREA HAS EXPIRED... AT 430 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE HEAVY RAIN IN THE WARNING AREA HAD ENDED. NO REPORTS OF FLASH FLOODING HAVE BEEN RECEIVED. LAT...LON 3922 10515 3925 10522 3914 10531 3914 10512 $$ BARJENBRUCH
000 WGUS75 KBOU 182231 CCA FFSBOU COC035-182245- FLASH FLOOD STATEMENT...CORRECTION NATIONAL WEATHER SERVICE DENVER CO 430 PM MDT WED AUG 18 2004 CORRECTED EXPIRATION TIME ...THE FLASH FLOOD WARNING FOR THE DOUGLAS COUNTY PORTION OF THE HAYMAN BURN AREA HAS EXPIRED... AT 430 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE HEAVY RAIN IN THE WARNING AREA HAD ENDED. NO REPORTS OF FLASH FLOODING HAVE BEEN RECEIVED. LAT...LON 3922 10515 3925 10522 3914 10531 3914 10512 $$ BARJENBRUCH
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 1:02 PM MDT | Flash Flood Warning | BOU | Larimer | 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.