Alert archive / Iowa / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 95, NWS Des Moines, IA

June 26, 1989Keokuk County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 26, 1989, 3:27 PM CDT for Keokuk County, Iowa. It was in force for 48 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
Jun 26, 1989, 3:27 PM CDT (20:27 UTC)
Expired
Jun 26, 1989, 4:15 PM CDT
In force
48 min
Issued by
NWS Des Moines, IA
Area
Whole counties

County Keokuk 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

TimeReportWhereRemark
Jun 26, 4:20 PM CDTHail 1Keokuk, IA
Jun 26, 4:25 PM CDTHail 1.75Keokuk, 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

Peoria Regional, IL (KPIA), launched 12:00Z, 8.5 hours before the alert went out and 229 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.

Skew-T log-pSkew-T log-p diagram, Peoria Regional, IL at 12:00Z on 1989-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1324 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peoria Regional, IL at 12:00Z on 1989-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1324 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
1200 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
16 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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, Jun 26, 11:48 AM CDT, 3 hours 39 minutes before
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Special weather statement, Jun 26, 12:38 PM CDT, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1237 AM CDT MON JUN 26 1989

...SEVERE THUNDERSTORM WATCH FOR PORTIONS OF EASTERN IOWA UNTIL
600 PM CDT...

AT 1225 AM...SHOWERS AND STRONG THUNDERSTORMS WERE IN NORTHEAST...
EAST CENTRAL AND SOUTHEAST IOWA.  LOCATED EAST OF LINE FROM THE
NORTHEAST CORNER OF THE STATE TO THE IOWA/MISSOURI BORDER SOUTH
OTTUMWA.  THE STRONGEST THUNDERSTORMS WERE IN A 10 MILE WIDE AREA
FROM 20 MILES SOUTHEAST OF OTTUMWA NEAR FAIRFIELD...TO 30 MILES
SOUTH OF CEDAR RAPIDS NEAR WASHINGTON.  THESE STORMS MAY PRODUCE
SMALL HAIL...STRONG GUSTY WINDS...DANGEROUS LIGHTNING...AND HEAVY
RAINS AS THEY MOVE TO THE EAST AT 25 TO 30 MILES AN HOUR.

OTHER SHOWERS AND THUNDERSTORMS WERE IN SOUTH CENTRAL IOWA...IN A 15
MILE WIDE AREA FROM 40 MILES SOUTHEAST OF DES MOINES JUST EAST OF
CHARITON...TO THE IOWA/MISSOURI BORDER NEAR LAMONI.  THESE SHOWERS
AND THUNDERSTORMS WERE MOVING TO THE EAST AT 25 MILES AN HOUR.

MG
Special weather statement, Jun 26, 12:45 PM CDT, 2 hours 42 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY...CORRECTION FOR TIME...
NATIONAL WEATHER SERVICE DES MOINES IA
1237 PM CDT MON JUN 26 1989

...SEVERE THUNDERSTORM WATCH FOR PORTIONS OF EASTERN IOWA UNTIL
600 PM CDT...

AT 1225 PM...SHOWERS AND STRONG THUNDERSTORMS WERE IN NORTHEAST...
EAST CENTRAL AND SOUTHEAST IOWA.  LOCATED EAST OF LINE FROM THE
NORTHEAST CORNER OF THE STATE TO THE IOWA/MISSOURI BORDER SOUTH
OTTUMWA.  THE STRONGEST THUNDERSTORMS WERE IN A 10 MILE WIDE AREA
FROM 20 MILES SOUTHEAST OF OTTUMWA NEAR FAIRFIELD...TO 30 MILES
SOUTH OF CEDAR RAPIDS NEAR WASHINGTON.  THESE STORMS MAY PRODUCE
SMALL HAIL...STRONG GUSTY WINDS...DANGEROUS LIGHTNING...AND HEAVY
RAINS AS THEY MOVE TO THE EAST AT 25 TO 30 MILES AN HOUR.

OTHER SHOWERS AND THUNDERSTORMS WERE IN SOUTH CENTRAL IOWA...IN A 15
MILE WIDE AREA FROM 40 MILES SOUTHEAST OF DES MOINES JUST EAST OF
CHARITON...TO THE IOWA/MISSOURI BORDER NEAR LAMONI.  THESE SHOWERS
AND THUNDERSTORMS WERE MOVING TO THE EAST AT 25 MILES AN HOUR.

MG
Special weather statement, Jun 26, 12:52 PM CDT, 2 hours 35 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
1252 PM CDT MON JUN 26 1989

THE NATIONAL WEATHER SERVICE HAS CANCELLED SEVERE THUNDERSTORM WATCH
NUMBER 537 FOR NORTHEAST IOWA...EFFECTIVE IMMEDIATELY.

THE FOLLOWING COUNTIES ARE NO LONGER IN THE WATCH AREA:

     CLAYTON...DELAWARE...DUBUQUE...JONES...AND JACKSON.

THE POTENTIAL SEVERE STORMS NO LONGER AFFECT THESE COUNTIES.

HOWEVER...SEVERE THUNDERSTORM WATCH NUMBER 537 STILL IS IN EFFECT FOR
THE FOLLOWING COUNTIES IN EAST CENTRAL AND SOUTHEAST IOWA:

     CEDAR...CLINTON...MUSCATINE...SCOTT...LOUISA...HENRY...
     DES MOINES...AND LEE.

STORMS WITH A POTENTIAL OF CAUSING SEVERE WEATHER REMAIN A THREAT FOR
THIS AREA.

BIKLE
Special weather statement, Jun 26, 1:43 PM CDT, 1 hour 44 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
140 PM CDT MON JUN 26 1989

...SEVERE THUNDERSTORM WATCH FOR EXTREME SOUTHEAST IOWA UNTIL
600 PM CDT...

AT 127 PM...SHOWERS AND STRONG THUNDERSTORMS WERE IN EAST CENTRAL
...AND SOUTHEAST IOWA.  LOCATED EAST OF LINE FROM 30 MILES NORTHWEST
OF DUBUQUE...TO THE IOWA/MISSOURI BORDER SOUTH OF KEOSAUQUA.  THE
STRONGEST THUNDERSTORMS WERE IN A 10 MILE WIDE AREA FROM 15 MILES
NORTHWEST OF BURLINGTON TO DAVENPORT/MOLINE.  THESE STORMS MAY
PRODUCE SMALL HAIL...STRONG GUSTY WINDS...DANGEROUS LIGHTNING...AND
HEAVY RAINS AS THEY MOVE TO THE EAST AT 25 TO 30 MILES AN HOUR.

OTHER ISOLATED SHOWERS AND THUNsDERSTORMS WERE IN CENTRAL IOWA...
BETWEEN DES MOINES AND RATHBUN RESERVOIR...AND WERE MOVING TO THE
EAST AT 25 MILES AN HOUR.

MG
Special weather statement, Jun 26, 2:15 PM CDT, 1 hour 12 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
213 PM CDT MON JUN 26 1989

SEVERE THUNDERSTORM WATCH NUMBER 537 IS CANCELLED FOR EXTREME
EAST CENTRAL AND EXTREME SOUTHEAST IOWA...EFFECTIVE IMMEDIATELY.

THE FOLLOWING COUNTIES ARE NO LONGER INCLUDED IN THIS WATCH:

    CEDAR...CLINTON...MUSCATINE...SCOTT...LOUISA...
    HENRY...DES MOINES...AND LEE.

THE THUNDERSTORMS HAVING A POTENTIAL FOR SEVERE WEATHER HAVE MOVED
EAST OF IOWA.

SEVERE THUNDERSTORM WATCH NUMBER 537 IS STILL IN EFFECT FOR PARTS
OF WESTERN ILLINOIS.

BIKLE

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 26, 2:56 PM CDTSevere Thunderstorm WarningDMXKeokuk, Mahaska49 min
Jun 26, 3:25 PM CDTSevere Thunderstorm WarningDMXKeokuk50 min
Jun 26, 3:55 PM CDTTornado WarningDMXKeokuk, Wapello35 min
Jun 26, 4:53 PM CDTSevere Thunderstorm WarningDMXDavis37 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.