Alert archive / Iowa / Flash Flood Warnings in 2002
Flash Flood Warning 12, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Aug 23, 2002, 12:15 AM CDT for 4 counties in Iowa. It was in force for 6 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 23, 2002, 12:15 AM CDT (05:15 UTC)
- Expired
- Aug 23, 2002, 6:15 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Counties, with a storm outline in the text
Counties Audubon County, IA, Dallas County, IA, Guthrie County, IA, Polk County, IA
The radar
The Des Moines radar (KDMX), 29 km from the middle of the area, began a volume at 05:19 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
Omaha, NE (KOAX), launched 00:00Z, 5.3 hours before the alert went out and 197 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
- 3464 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 856 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 2.0
- Supercell composite
- 11.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KDMX 230519 FFWDSM IAC009-049-077-153-231115- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 1215 AM CDT FRI AUG 23 2002 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... DALLAS COUNTY IN CENTRAL IOWA POLK COUNTY IN CENTRAL IOWA THIS INCLUDES THE CITY OF DES MOINES SOUTHERN AUDUBON COUNTY IN WEST CENTRAL IOWA GUTHRIE COUNTY IN WEST CENTRAL IOWA * UNTIL 615 AM * AT 1215 AM...WEATHER SERVICE DOPPLER RADAR INDICATED NUMEROUS THUNDERSTORMS PRODUCING VERY HEAVY RAIN...IN THESE COUNTIES. THE MOST LIKELY AREAS TO SEE SIGNIFICANT FLOODING WOULD BE IN THE CITIES AS WELL AS SMALL STREAMS AND RIVERS. THE HEAVY RAINS WILL CONTINUE FOR THE NEXT 2 TO 3 HOURS AND CONDITIONS SHOULD IMPROVE AS THE RAIN TAPERS OFF. * OTHER WARNING LOCATIONS INCLUDE... ADEL...ALLEMAN...ALTOONA...ANKENY...AUDUBON...BAGLEY...BONDURANT... BOUTON...BRAYTON...CLIVE...DALLAS CENTER...DAWSON...DE SOTO... ELKHART...EXIRA...GRANGER...GRAY...GRIMES...GUTHRIE CENTER... JAMAICA...JOHNSTON...KIMBALLTON...LINDEN...MINBURN...MITCHELLVILLE... PANORA...PERRY...PLEASANT HILL...POLK CITY...REDFIELD... SAYLORVILLE...URBANDALE...VAN METER...WAUKEE...WEST DES MOINES... WINDSOR HEIGHTS AND YALE FLASH FLOODS OCCUR QUICKLY...MOVE TO HIGHER GROUND. AVOID WATER COVERED ROADS...THE ROAD MAY BE WASHED OUT. LESS THAN ONE FOOT OF FAST FLOWING WATER CAN SWEEP AN AUTOMOBILE OFF THE ROAD. LAT...LON 4184 9335 4151 9336 4152 9513 4185 9514 BARLOW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 12:15 AM CDT | Flash Flood Warning | DMX | Audubon, Dallas, Guthrie, Polk | 18 hr |
| Aug 23, 12:28 AM CDT | Severe Thunderstorm Warning | DMX | Polk | 47 min |
| Aug 23, 12:54 AM CDT | Severe Thunderstorm Warning | DMX | Jasper | 51 min |
Nearby
Flash Flood Warnings in Iowa, 2002Every flash flood warning in 2002
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.