Alert archive / Iowa / Flash Flood Warnings in 2001
Flash Flood Warning 14, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Aug 3, 2001, 5:49 AM CDT for Calhoun County, Pocahontas County, Sac County, 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Aug 3, 2001, 5:49 AM CDT (10:49 UTC)
- Expired
- Aug 3, 2001, 11:45 AM CDT
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Calhoun County, IA, Pocahontas County, IA, Sac County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 10.8 hours before the alert went out and 188 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
- 3899 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 1146 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KDMX 031052 FFWDMX IAC025-151-161-031650- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 549 AM CDT FRI AUG 3 2001 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLASH FLOOD WARNING FOR... POCAHONTAS COUNTY IN NORTHWEST IOWA CALHOUN COUNTY IN WEST CENTRAL IOWA SAC COUNTY IN WEST CENTRAL IOWA * UNTIL 1145 AM CDT * AT 545 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH FLASH FLOOD PRODUCING RAINS MOVING INTO THE WARNED AREA. THESE STORMS WILL MOVE INTO SAC...POCAHONTAS...AND CALHOUN COUNTIES BETWEEN 6:15 AND 7:30 AM. WARNING LOCATIONS INCLUDE LAKE VIEW...MANSON...ODEBOLT... POCAHONTAS...ROCKWELL CITY AND SAC CITY * THE GROUND IS ALREADY SATURATED BY RAINFALL IN THE WARNING AREA... AND ADDITIONAL RAIN WILL PRODUCE SIGNIFICANT RUNOFF INTO SWOLLEN WATERWAYS. THUNDERSTORMS IN THE AREA ARE EXPECTED TO PRODUCE RAINFALL RATES 1 TO 3 INCHES PER HOUR. THIS WILL PRODUCE FLASH FLOODING ALONG THE LIZARD CREEK...CEDAR AND LITTLE CEDAR CREEK...CAMP CREEK...WEST CREEK...LAKE CREEK...INDIAN CREEK...AND ODEBOLT CREEK. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA...LIVING NEAR THE AFFECTED WATERWAYS...YOU SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. LAT...LON 4287 9525 4226 9533 4229 9440 4290 9450 KULA
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 5:02 AM CDT | Flash Flood Warning | DMX | Davis | 4 hr |
| Aug 3, 6:06 AM CDT | Flash Flood Warning | DMX | Wapello | 3 hr |
| Aug 3, 7:01 AM CDT | Severe Thunderstorm Warning | DMX | Greene | 39 min |
| Aug 3, 8:50 AM CDT | Flash Flood Warning | DMX | Appanoose, Davis, Monroe, Wapello | 4 hr |
Nearby
Flash Flood Warnings in Iowa, 2001Every flash flood warning in 2001
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.