Alert archive / Colorado / Flash Flood Warnings in 2004
Flash Flood Warning 41, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Aug 18, 2004, 8:00 PM MDT for Arapahoe 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, 8:00 PM MDT (02:00 UTC)
- Expired
- Aug 18, 2004, 10:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Counties, with a storm outline in the text
County Arapahoe County, CO
The radar
The Denver radar (KFTG), 18 km from the middle of the area, began a volume at 02:03 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, 2.0 hours before the alert went out and 123 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
- 45 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 592 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 246 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 190205 FFWBOU COC005-190430- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 800 PM MDT WED AUG 18 2004 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... WESTERN ARAPAHOE COUNTY IN NORTHEAST COLORADO * UNTIL 1030 PM MDT * AT 800 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN OVER MUCH OF WESTERN ARAPAHOE COUNTY. THE HEAVY RAIN WILL CONTINUE THROUGH 10 PM...WITH RAINFALL RATES CLOSE TO ONE HALF INCH PER HOUR. THE ARAPAHOE COUNTY SHERIFF REPORTED FLOODING CONTINUED AT WATKINS ROAD AND 6TH AVENUE...AND ALSO AT ARAPAHOE ROAD AND LIVERPOOL. A CONTINUATION OF HEAVY RAINFALL WILL KEEP STREAMS RUNNING AT OR ABOVE BANKFULL LEVELS...AND PRODUCE CONSIDERABLE FLOODING OF ROADS AND INTERSECTIONS. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...SOUTHERN AURORA...EASTERN CENTENNIAL...ARAPAHOE PARK AND BUCKLEY AFB. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 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. LAT...LON 3957 10449 3974 10449 3973 10484 3957 10487 $$ BARJENBRUCH
2 follow-up statements
000 WGUS75 KBOU 190343 FFSBOU COC005-190430- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 940 PM MDT WED AUG 18 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR WESTERN ARAPAHOE COUNTY UNTIL 1030 PM MDT... THE ARAPAHOE COUNTY SHERIFF REPORTED FLOODING ALONG PINEY CREEK THROUGH CENTENNIAL. CALEY DRIVE JUST NORTH OF ARAPAHOE ROAD WAS CLOSED DUE TO SIGNIFICANT FLOODING OF PINEY CREEK. HIGH WATER WAS ALSO REPORTED AT PEORIA AND ORCHARD. WATKINS ROAD NEAR 6TH AVENUE REMAIN CLOSED. AT 940 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN OVER MUCH OF WESTERN ARAPAHOE COUNTY. HOWEVER...RAINFALL RATES HAD DECREASED TO AROUND ONE THIRD OF AN INCH PER HOUR. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...SOUTHERN AURORA...EASTERN CENTENNIAL...ARAPAHOE PARK AND BUCKLEY AFB. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. LAT...LON 3957 10449 3974 10449 3973 10484 3957 10487 $$ BARJENBRUCH
000 WGUS75 KBOU 190434 FFSBOU COC005-190450- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1033 PM MDT WED AUG 18 2004 ...THE FLASH FLOOD WARNING FOR WESTERN ARAPAHOE COUNTY HAS EXPIRED... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE RAIN CONTINUED TO SLOWLY DIMINISH IN INTENSITY ACROSS THE WARNED AREA. RAINFALL RATES HAD DECREASED TO ONE TO TWO TENTHS OF AN INCH PER HOUR. THE ARAPAHOE COUNTY SHERIFF REPORTED NO ADDITIONAL FLOODING SINCE 9 PM. LAT...LON 3957 10449 3974 10449 3973 10484 3957 10487 $$ BARJENBRUCH
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 9:53 PM MDT | Flash Flood Warning | BOU | Lincoln | 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.