Alert archive / Colorado / Flash Flood Warnings in 2003
Flash Flood Warning 19, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 29, 2003, 2:20 PM MDT for Jefferson 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
- Jul 29, 2003, 2:20 PM MDT (20:20 UTC)
- Expired
- Jul 29, 2003, 5:15 PM MDT
- In force
- 3 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), 61 km from the middle of the area, began a volume at 20:22 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, 8.3 hours before the alert went out and 173 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
- 176 J/kg
- Mixed-layer CIN
- -229 J/kg
- Mixed-layer LCL
- 1477 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 39 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 292021 FFWBOU COC059-292315- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 220 PM MDT TUE JUL 29 2003 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTH CENTRAL JEFFERSON COUNTY IN NORTHEAST COLORADO * UNTIL 515 PM MDT * AT 220 PM MDT...THE A WEATHER SERVICE EMPLOYEE REPORTED VERY HEAVY RAIN OVER GOLDEN...OR ABOUT 15 MILES WEST OF DENVER. THE STORM PRODUCING THE HEAVY RAIN WAS MOVING SOUTHEAST AT 10 MPH. LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...WESTERN ARVADA...GOLDEN...NORTHWESTERN LAKEWOOD...WESTERN WHEAT RIDGE AND WHITE RANCH OPEN SPACE. 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...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING. LAT...LON 3985 10535 3966 10531 3968 10513 3985 10514 $$ DANKERS
2 follow-up statements
000 WGUS75 KBOU 292112 FFSBOU COC059-292230- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 310 PM MDT TUE JUL 29 2003 A FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTH CENTRAL JEFFERSON COUNTY UNTIL 515 PM MDT. AT 300 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED WEAKENING THUNDERSTORMS WERE MOVING TOWARD THE SOUTH SOUTHEAST OUT OF NORTH CENTRAL JEFFERSON COUNTY. WHILE THE HEAVY RAIN HAS ENDED IN NORTH CENTRAL JEFFERSON COUNTY...FLOOD PROBLEMS ARE STILL BEING REPORTED ALONG SECTIONS OF HIGHWAY 93. DOPPLER RADAR ESTIMATES AND RAIN GAGES INDICATE THAT BETWEEN 1 AND 1.5 INCHES OF RAIN FELL ALONG HIGHWAY 93 NORTH OF GOLDEN IN LESS THAN 30 MINUTES. THE RAINFALL HAS CAUSED SIGNIFICANT RISES IN VAN BIBBER CREEK AND LENA GULCH. HOWEVER...THE CREEKS ARE STILL BELOW BANKFULL. WHILE THE RAINFALL IS ENDING...FLOODING OF CREEKS AND GULLIES... ROADS AND CULVERTS IS LIKELY CONTINUING. DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY AUTOMOBILE. IF YOUR VEHICLE STALLS ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. LAT...LON 3985 10535 3966 10531 3968 10513 3985 10514 $$
000 WGUS75 KBOU 292212 FFSBOU COC059-292230- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 410 PM MDT TUE JUL 29 2003 ...FLASH FLOOD WARNING CANCELLED... THE FLASH FLOOD WARNING FOR NORTH CENTRAL JEFFERSON COUNTY HAS BEEN CANCELLED. AT 400 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE THUNDERSTORMS AND HEAVY RAIN SHOWERS OVER THE WESTERN SUBURBS OF DENVER HAD DISSIPATED. A FEW MORE LIGHT RAIN SHOWERS WERE BEGINNING TO MOVE OUT OF THE FOOTHILLS...BUT ADDITIONAL RAIN AMOUNTS ARE EXPECTED TO BE LESS THAN A QUARTER OF AN INCH. NO ADDITIONAL FLOODING PROBLEMS WERE BEING REPORTED IN THE GOLDEN AREA. EARLIER...SOME BASEMENT FLOODING WAS REPORTED IN NORTHERN GOLDEN AND ALONG GOLDEN GATE CANYON ROAD. HIGH WATER WAS ALSO REPORTED IN LENA GULCH. DOPPLER RADAR ESTIMATES AND RAIN GAGES INDICATE THAT BETWEEN 1 AND 1.5 INCHES OF RAIN FELL ALONG HIGHWAY 93 NORTH OF GOLDEN AND OVER WHITE RANCH OPEN SPACE IN LESS THAN 30 MINUTES. RUNOFF FROM THE RAINFALL CAUSED SIGNIFICANT RISES IN VAN BIBBER CREEK AND LENA GULCH. LAT...LON 3985 10535 3966 10531 3968 10513 3985 10514 $$ DANKERS
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 6:55 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 50 min |
| Jul 29, 3:09 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Douglas | 51 min |
| Jul 29, 3:34 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 41 min |
Nearby
Flash Flood Warnings in Colorado, 2003Every flash flood warning in 2003
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.