Alert archive / Colorado / Flash Flood Warnings in 1997
Flash Flood Warning 13, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 28, 1997, 6:58 PM MDT for Weld County, Colorado. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Jul 28, 1997, 6:58 PM MDT (00:58 UTC)
- Expired
- Jul 28, 1997, 9:00 PM MDT
- In force
- 2 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Weld County, CO
The radar
The Denver radar (KFTG), 43 km from the middle of the area, began a volume at 01:01 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, 1.0 hours before the alert went out and 125 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
- 733 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1050 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 290057
FFWDEN
COC123-290300-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
658 PM MDT MON JUL 28 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS EXTENDED THE FLASH FLOOD
WARNING EFFECTIVE UNTIL 900 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN NORTHEAST COLORADO
SOUTHWESTERN WELD
INCLUDING AREAS NORTHEAST OF FORT LUPTON AND NORTHWEST OF HUDSON
AT 655 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED UP
TO 6 INCHES OF RAIN HAD FALLEN 5 MILES MILES NORTHWEST OF
HUDSON...OR ABOUT 25 MILES NORTHEAST OF DENVER. THUNDERSTORMS
CONTINUED OVER THE AREA...AND UP TO ANOTHER INCH OF RAIN CAN BE
EXPECTED BEFORE IT ENDS LATER THIS EVENING.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.
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...INCLUDING BOX ELDER
CREEK AND BEEBE SEEP CANAL...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.
BARJENBRUCH
LAT...LON 4023 10461 4023 10455 4012 10458 4005 10473
4010 10479 4021 10467The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 6:41 PM MDT | Flash Flood Warning | BOU | Adams | 2 hr |
| Jul 28, 7:55 PM MDT | Tornado Warning | BOU | Elbert | 35 min |
| Jul 28, 9:40 PM MDT | Flash Flood Warning | BOU | Larimer | 2 hr |
| Jul 29, 3:50 PM MDT | Tornado Warning | BOU | Arapahoe, Elbert | 40 min |
| Jul 29, 4:38 PM MDT | Flash Flood Warning | BOU | Elbert | 112 min |
| Jul 29, 5:37 PM MDT | Flash Flood Warning | BOU | Elbert | 113 min |
Nearby
Flash Flood Warnings in Colorado, 1997Every flash flood warning in 1997
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.