Alert archive / Colorado / Flash Flood Warnings in 2004
Flash Flood Warning 36, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Aug 18, 2004, 3:32 PM MDT for Jefferson County, Colorado. It was in force for 4 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, 3:32 PM MDT (21:32 UTC)
- Expired
- Aug 18, 2004, 7:30 PM MDT
- In force
- 4 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Counties, with a storm outline in the text
County Jefferson County, CO
The radar
The Denver radar (KFTG), 69 km from the middle of the area, began a volume at 21:36 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, 9.5 hours before the alert went out and 180 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 182135
FFWBOU
COC059-190130-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
332 PM MDT WED AUG 18 2004
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
JEFFERSON COUNTY IN NORTHEAST COLORADO
* UNTIL 730 PM MDT
* AT 332 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN OVER WHITE RANCH OPEN SPACE...OR ABOUT 18 MILES
WEST OF DENVER. THE STORM PRODUCING THE HEAVY RAIN WAS NEARLY
STATIONARY.
LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...WEST
CENTRAL ARVADA...GOLDEN...WEST CENTRAL LAKEWOOD...ASPEN PARK...BERGEN
PARK...BUFFALO CREEK...CONIFER...EVERGREEN...IDLEDALE...INDIAN
HILLS...KITTREDGE...MORRISON...PINE...RED ROCKS PARK...ROCKY FLATS...
TINY TOWN...WELLINGTON LAKE AND WHITE RANCH OPEN SPACE.
DOPPLER RADAR INDICATED BETWEEN 1 AND 2 INCHES OF RAIN HAD FALLEN IN
THE FOOTHILLS OF NORTHERN JEFFERSON COUNTY. THE STORMS PRODUCING THE
RAIN WILL CONTINUE TO REMAIN STATIONARY AND WILL EXPAND SOUTHWARD
INTO CONIFER AND BUFFALO CREEK.
THIS WARNING WILL ALSO COVER THE HAYMAN BURN AREA ACROSS SOUTHERN
JEFFERSON COUNTY.
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.
LAT...LON 3992 10519 3992 10540 3913 10540 3914 10533
3925 10526 3935 10518
$$
ENTREKIN1 follow-up statement
000 WGUS75 KBOU 182312 CCA FFSBOU COC059-182330- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 512 PM MDT WED AUG 18 2004 THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WESTERN JEFFERSON COUNTY HAS BEEN CANCELLED. AT 506 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED LIGHT TO MODERATE RAIN ACROSS MUCH OF WESTERN JEFFERSON COUNTY. AT 415 PM...A SPOTTER IN RALSTON BUTTES REPORTED 2.83 INCHES OF RAIN. PERSONS IN AND NEAR WEST CENTRAL ARVADA...GOLDEN...ASPEN PARK... BERGEN PARK...BUFFALO CREEK...CONIFER...EVERGREEN...IDLEDALE...INDIAN HILLS...KITTREDGE...PINE...RED ROCKS PARK...ROCKY FLATS...TINY TOWN...WELLINGTON LAKE AND WHITE RANCH OPEN SPACE SHOULD REMAIN ALERT TO CHANGING WEATHER CONDITIONS. LAT...LON 3992 10519 3992 10540 3913 10540 3914 10533 3925 10526 3935 10518 $$ ENTREKIN
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 1:02 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, 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.