Alert archive / Iowa / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 35, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Apr 27, 1989, 10:05 PM CDT for Adair County, Adams County, Cass County, Iowa. It was in force for 40 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 27, 1989, 10:05 PM CDT (03:05 UTC)
- Expired
- Apr 27, 1989, 10:45 PM CDT
- In force
- 40 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Adair County, IA, Adams County, IA, Cass County, IA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 27, 10:19 PM CDT | Thunderstorm Wind 70 | Adams, IA | |
| Apr 27, 10:20 PM CDT | Thunderstorm Wind 50 | Adair, IA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.1 hours before the alert went out and 140 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, 4:43 PM CDT, 5 hours 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 442 PM CDT THU APR 27 1989 ...A TORNADO WATCH IS IN EFFECT FOR A SMALL PART OF WESTERN IOWA UNTIL 8 PM... THERE HAS BEEN NO SEVERE WEATHER REPORTED IN IOWA SINCE 335 PM. AT 435 PM...A SMALL CLUSTER OF SHOWERS AND THUNDERSTORMS HAD DEVELOPED OVER SOUTHEAST IOWA. THE PRECIPITATION WAS LOCATED AROUND THE CITIES OF BRIGHTON...WASHINGTON AND WAPELLO. A THUNDERSTORM HAD ALSO DEVELOPED AROUND BLOOMFIELD. THE AREA OF DEVELOPMENT WAS BETWEEN THE CITIES OF OTTUMWA...BURLINGTON AND THE QUAD CITIES. THE SHOWERS AND STORMS WERE MOVING EAST AT 25 MILES AN HOUR. BARLOW
Special weather statement, Apr 27, 8:17 PM CDT, 1 hour 48 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, 15 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
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 | 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, 11:26 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion | 49 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.