Alert archive / Colorado / Flash Flood Warnings in 2004
Flash Flood Warning 39, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Aug 18, 2004, 4:57 PM MDT for Arapahoe County, 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, 4:57 PM MDT (22:57 UTC)
- Expired
- Aug 18, 2004, 8:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Counties, with a storm outline in the text
Counties Arapahoe County, CO, Douglas County, CO
The radar
The Denver radar (KFTG), 39 km from the middle of the area, began a volume at 22:58 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, 11.0 hours before the alert went out and 146 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 182258 FFWBOU COC005-035-190200- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 457 PM MDT WED AUG 18 2004 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHWESTERN ARAPAHOE COUNTY IN NORTHEAST COLORADO NORTH CENTRAL DOUGLAS COUNTY IN NORTHEAST COLORADO * UNTIL 800 PM MDT * AT 457 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED TORRENTIAL RAIN OVER CENTRAL CENTENNIAL...OR ABOUT 10 MILES SOUTHEAST OF DENVER. THE STORM PRODUCING THE HEAVY RAIN WAS NEARLY STATIONARY. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO... SOUTHWESTERN AURORA...CENTENNIAL...SOUTH CENTRAL ENGLEWOOD...EASTERN LITTLETON...GREENWOOD VILLAGE...HIGHLANDS RANCH AND SURREY RIDGE. DOPPLER RADAR INDICATES RAINFALL RATES OF 2 TO 3 INCHES IN AN HOUR OCCURRING WITH THESE STORMS. 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...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. LAT...LON 3948 10478 3966 10481 3964 10499 3948 10505 $$ BARJENBRUCH
2 follow-up statements
000 WGUS75 KBOU 182354 FFSBOU COC005-035-190200- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 553 PM MDT WED AUG 18 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHWESTERN ARAPAHOE COUNTY AND NORTH CENTRAL DOUGLAS COUNTY UNTIL 800 PM MDT... AT 553 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE STORMS PRODUCING TORRENTIAL RAIN WERE MOVING SLOWLY EAST INTO THE FOXFIELD...GRANDVIEW ESTATES...AND NORTHWEST PARKER AREAS. DOPPLER RADAR INDICATES THAT AROUND 3 INCHES OF RAIN FELL JUST WEST OF THE PARK MEADOWS SHOPPING MALL. BETWEEN 2 AND 3 INCHES OF RAIN WILL FALL AS THE STORMS MOVE SLOWLY EASTWARD ACROSS THE FAR SOUTHEASTERN SECTIONS OF THE DENVER METRO AREA. LOCATIONS REMAINING IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...SOUTHWESTERN AURORA...CENTENNIAL...EASTERN LITTLETON... GREENWOOD VILLAGE...HIGHLANDS RANCH...AND SURREY RIDGE. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. LAT...LON 3948 10478 3966 10481 3964 10499 3948 10505 $$ BARJENBRUCH
000 WGUS75 KBOU 190101 FFSBOU COC005-035-190200- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 700 PM MDT WED AUG 18 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHWESTERN ARAPAHOE COUNTY AND NORTH CENTRAL DOUGLAS COUNTY UNTIL 800 PM MDT... AT 700 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE THUNDERSTORMS WITH TORRENTIAL RAIN HAD MOVED EAST OF THE METRO AREA. A STEADY LIGHT TO MODERATE RAIN COVERED THE AREA AND WILL CONTINUE THROUGH 8 PM. HOWEVER...THIS WILL NOT ADD TO FLOODING PROBLEMS. THE ARAPAHOE COUNTY SHERIFF REPORTED SOME FLOODING AT JORDAN AND BRONCOS...AS WELL AS NEAR THE INTERSECTION OF JORDAN AND POTOMAC. 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 3948 10478 3966 10481 3964 10499 3948 10505 $$ 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, 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, 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.