Alert archive / Iowa / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 40, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Apr 27, 1989, 11:26 PM CDT for Jasper County, Marion County, Iowa. It was in force for 49 min.
The area
The counties it named.
The facts
- Issued
- Apr 27, 1989, 11:26 PM CDT (04:26 UTC)
- Expired
- Apr 28, 1989, 12:15 AM CDT
- In force
- 49 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Jasper County, IA, Marion County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 4.4 hours before the alert went out and 275 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
- 17 J/kg
- Mixed-layer CIN
- -176 J/kg
- Mixed-layer LCL
- 3565 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Apr 27, 8:17 PM CDT, 3 hours 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 815 PM CDT THU APR 27 1989 ...STRONG THUNDERSTORMS MOVING INTO CRAWFORD COUNTY IN WEST CENTRAL IOWA... AT 815 PM...SEVERAL STRONG THUNDERSTORMS WERE MOVING THROUGH CRAWFORD COUNTY. ONE STORM WAS OVER SOUTHEAST CRAWFORD COUNTY...WHILE ANOTHER CLUSTER OF STORMS WAS OVER NORTHWEST SHELBY AND EASTERN HARRISON COUNTIES. THESE AREAS ARE SOME 40 TO 60 MILES NORTHEAST OF COUNCIL BLUFFS. SO FAR...THESE STORMS HAVE PRODUCED LOTS OF PEA TO MARBLE SIZED HAIL...AND WINDS OF 30 TO 40 MILES AN HOUR. ALTHOUGH NO SEVERE WEATHER IS INDICATED AT THIS TIME...PEOPLE IN CRAWFORD COUNTY SHOULD REMAIN ALERT. REMEMBER...A TORNADO- WATCH IS IN EFFECT UNTIL 1 AM. < TRUETT
Special weather statement, Apr 27, 9:50 PM CDT, 1 hour 36 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 945 PM CDT THU APR 27 1989 ...A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF WESTERN IOWA THIS THURSDAY EVENING AND EARLY FRIDAY MORNING... NO SEVERE WEATHER WAS REPORTED IN IOWA BETWEEN 830PM AND 930 PM. AT 932 PM CDT...NUMEROUS SHOWERS AND STRONG THUNDERSTORMS CONTINUED OVER ABOUT THE WEST ONE HALF OF IOWA. THE LEADING...OR EAST EDGE OF THE PRECIPITATION IN IOWA...EXTENDED FROM THE IOWA/MISSOURI BORDER 25 MILES WEST OF LAMONI...OR 75 MILES SOUTHWEST OF DES MOINES....TO 10 MILES WEST OF DES MOINES...TO THE IOWA/MINNESOTA BORDER NEAR ESTHERVILLE...OR 100 MILES NORTHEAST OF SIOUX CITY. THE SHOWERS AND THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR...WHILE THE ENTIRE AREA OF RAINFALL WAS SHIFTING SOUTHEAST AT 15 MILES AN HOUR. THE LARGE AMOUNTS OF RAINFALL FROM SOME OF THESE THUNDERSTORMS COULD CAUSE SOME STREET AN3D LOW LYING AREA FLOODING. BARLOW/MARTIN
Special weather statement, Apr 27, 11:14 PM CDT, 12 minutes before
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</html>The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 7:08 PM CDT | Tornado Warning | DMX | Davis, Van Buren | 22 min |
| Apr 27, 7:33 PM CDT | Tornado Warning | DMX | Van Buren | 27 min |
| Apr 27, 8:44 PM CDT | Tornado Warning | DMX | Calhoun, Carroll, Sac | 61 min |
| Apr 27, 8:58 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Carroll | 37 min |
| Apr 27, 10:05 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass | 40 min |
| Apr 27, 10:05 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Taylor, Union | 40 min |
| Apr 27, 10:33 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Madison | 42 min |
| Apr 27, 10:33 PM CDT | Severe Thunderstorm Warning | DMX | Decatur | 42 min |
| Apr 27, 11:05 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk, Warren | 40 min |
| Apr 27, 11:42 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Monroe | 48 min |
| Apr 28, 12:01 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Monroe | 44 min |
| Apr 28, 12:01 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Poweshiek | 44 min |
| Apr 28, 12:01 AM CDT | Severe Thunderstorm Warning | DMX | Marion | 44 min |
| Apr 28, 12:16 AM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 44 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1989Every severe thunderstorm warning in 1989
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.