Alert archive / Colorado / Flash Flood Warnings in 2004
Flash Flood Warning 35, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Aug 18, 2004, 3:08 PM MDT for Boulder 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, 3:08 PM MDT (21:08 UTC)
- Expired
- Aug 18, 2004, 6:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Counties, with a storm outline in the text
County Boulder County, CO
The radar
The Denver radar (KFTG), 79 km from the middle of the area, began a volume at 21:07 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, 9.1 hours before the alert went out and 183 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 182111 FFWBOU COC013-190000- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 308 PM MDT WED AUG 18 2004 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR THE OVERLAND BURN AREA IN... CENTRAL BOULDER COUNTY IN NORTHEAST COLORADO * UNTIL 600 PM MDT * AT 308 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN 1 MILE EAST OF JAMESTOWN...OR ABOUT 32 MILES SOUTHWEST OF FORT COLLINS. THE STORM PRODUCING THE HEAVY RAIN WAS NEARLY STATIONARY. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...JAMESTOWN AND SURROUNDING AREAS OF THE OVERLAND BURN AREA. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS...AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER ROCK AND MUDSLIDES IN THE OVERLAND BURN AREA. 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. IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS... OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS. LAT...LON 4010 10541 4011 10528 4017 10527 4015 10540 $$ BARJENBRUCH
3 follow-up statements
000 WGUS75 KBOU 182148 FFSBOU COC013-190000- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 348 PM MDT WED AUG 18 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE OVERLAND BURN AREA IN CENTRAL BOULDER COUNTY UNTIL 600 PM MDT... AT 345 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE TORRENTIAL RAIN HAD SHIFTED TO THE FAR EASTERN SIDE OF THE OVERLAND BURN AREA. THE STORM WAS BEGINNING TO MOVE SLOWLY EAST. THIS WILL ALLOW JAMESTOWN TO ESCAPE THE BRUNT OF THE FLOODING...BUT THE EASTERN TWO THIRDS OF THE OVERLAND BURN AREA WILL EXPERIENCE FLASH FLOODING UNTIL 630 PM. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS...AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER ROCK AND MUDSLIDES IN THE OVERLAND BURN AREA. IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. LAT...LON 4010 10541 4011 10528 4017 10527 4015 10540 $$ BARJENBRUCH
000 WGUS75 KBOU 182328 FFSBOU COC013-190000- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 525 PM MDT WED AUG 18 2004 ...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE OVERLAND BURN AREA IN CENTRAL BOULDER COUNTY UNTIL 600 PM MDT... AT 447 PM MDT...THE BOULDER COUNTY ROAD DEPARTMENT REPORTED WATER FLOWING OVER JAMES CANYON ROAD EAST OF JAMESTOWN. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE HEAVIEST RAIN HAD ENDED...BUT LIGHT TO MODERATE RAIN CONTINUED TO FALL. AS A RESULT...FLASH FLOODING WILL SLOWLY DECREASE THROUGH 6 PM MDT. 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. WATCH OUT FOR ROCK AND MUD SLIDES. LAT...LON 4010 10541 4011 10528 4017 10527 4015 10540 $$ BARJENBRUCH
000 WGUS75 KBOU 190004 FFSBOU COC013-190020- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 600 PM MDT WED AUG 18 2004 ...THE FLASH FLOOD WARNING FOR THE OVERLAND BURN AREA IN CENTRAL BOULDER COUNTY HAS EXPIRED... AT 600 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED ONLY LIGHT RAIN IN THE BURN AREA. NO ADDITIONAL REPORTS OF FLOODING HAVE BEEN RECEIVED SINCE EARLIER THIS AFTERNOON. LAT...LON 4010 10541 4011 10528 4017 10527 4015 10540 $$ 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, 3:32 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.