Alert archive / Iowa / Flash Flood Warnings in 1998
Flash Flood Warning 2, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood warning at Jun 14, 1998, 6:32 PM CDT for Audubon County, Cass County, Iowa. It was in force for 11 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 14, 1998, 6:32 PM CDT (23:32 UTC)
- Expired
- Jun 15, 1998, 6:00 AM CDT
- In force
- 11 hr
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Audubon County, IA, Cass County, IA
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 11.5 hours before the alert went out and 286 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
- 332 J/kg
- Mixed-layer CIN
- -266 J/kg
- Mixed-layer LCL
- 923 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- -105 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 142332 FFWDSM IAC009-029-151100- BULLETIN - EAS ACTIVATION REQUESTED FLOOD WARNING NATIONAL WEATHER SERVICE DES MOINES IA 632 PM CDT SUN JUN 14 1998 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * FLOOD WARNING FOR... SOUTHERN AUDUBON COUNTY IN WEST CENTRAL IOWA CASS COUNTY IN SOUTHWESTERN IOWA * UNTIL 600 AM CDT THIS WARNING HAS BEEN EXPANDED TO INCLUDE SOUTHERN AUDUBON. INTENSE RAINS HAVE OCCURRED OVER SOUTHERN AUDUBON AND ALL OF CASS COUNTY SINCE EARLY LAST NIGHT. ATLANTIC HAS MEASURED AROUND 13 INCHES OF RAIN SINCE MIDNIGHT. DOPPLER RADAR HAS INDICATED AMOUNTS OF 4 TO 8 INCHES OVER THE REST OF CASS COUNTY AND MOST OF SOUTHERN AUDUBON... SOUTH OF HIGHWAY 44. FLOODING WILL PUSH ALL CREEKS AND STREAMS OUT OF THE THEIR BANKS BY AT LEAST 3 TO 4 FEET IF NOT MORE. COUNTY ROADS AND HIGHWAYS WILL BE INUNDATED. HIGHWAY 71 IS BEING CLOSED IN SOUTHERN AUDUBON. RIVERS AFFECTED ARE... THE UPPER REACHES OF THE EAST NISHNABOTNA INCLUDING ALL STREAMS AND TRIBUTARIES FLOWING INTO IT. THE RIVER IS FORECAST TO REACH 22 TO 24 FEET THIS EVENING 5 MILES SOUTHWEST OF ATLANTIC. THIS IS VERY CLOSE TO OR EXCEEDING A RECORD FLOOD. THE PREVIOUS RECORD IS 22.8 FEET WHICH OCCURRED IN 1972. WIDESPREAD AGRICULTURAL FLOODING AS WELL AS SOME PARTS OF ATLANTIC WILL FLOOD. THE UPPER REACHES OF THE NODAWAY WILL FLOOD AS WELL...AT LEAST BY 2 TO 4 FEET OVER BANKFULL. ALL PERSONS LIVING NEAR OR ALONG FLOOD-PRONE AREAS SHOULD BE PREPARED xTO MOVE TO HIGHER GROUND IMMEDIATELY. DO NOT DRIVE OVER FLOODED ROADWAYS...SINCE THEY MAYBE WASHED OUT. MYERS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 1:10 AM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 35 min |
| Jun 14, 1:42 AM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 33 min |
| Jun 14, 2:06 AM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Union | 49 min |
| Jun 14, 8:56 AM CDT | Flash Flood Warning | DMX | Cass | 3 hr |
| Jun 14, 2:35 PM CDT | Tornado Warning | DMX | Davis | 45 min |
Nearby
Flash Flood Warnings in Iowa, 1998Every flash flood warning in 1998
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.