Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 91, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 25, 1992, 5:16 PM CDT for Jefferson County, Iowa. It was in force for 29 min.
The area
The counties it named.
The facts
- Issued
- Aug 25, 1992, 5:16 PM CDT (22:16 UTC)
- Expired
- Aug 25, 1992, 5:45 PM CDT
- In force
- 29 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Jefferson County, IA
The nearest sounding before it
Omaha, NE (KOVN), launched 12:00Z, 10.3 hours before the alert went out and 371 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 534 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 252221 COR SVRDSM IAC101-252245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING...CORRECTION LOCATION OF BATAVIA NATIONAL WEATHER SERVICE DES MOINES IA 516 PM CDT TUE AUG 25 1992 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTHEAST IOWA ...NORTHWESTERN JEFFERSON COUNTY AT 512 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES EAST OF OTTUMWA NEAR BATAVIA. MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR. THIS STORM WILL PASS NEAR ABINGDON AROUND 520 PM CDT AND NEAR PACKWOOD AT 535 PM CDT. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...DEST~RUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. BURKE
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, Aug 25, 2:52 PM CDT, 2 hours 24 minutes before
IAZALL-252040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 250 PM CDT TUE AUG 25 1992 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR A PART OF NORTHEAST IOWA THIS TUESDAY AFTERNOON AND EVENING UNTIL 9 PM CDT... AT 233 PM...A CLUSTER OF INTENSE THUNDERSTORMS WITH VERY HEAVY RAINS WERE OVER CENTRAL IOWA...FROM 30 MILES SOUTHWEST OF WATERLOO OR BETWEEN MARSHALLTOWN AND TOLEDO...TO 20 MILES EAST OF DES MOINES. THESE STORMS WERE CAPABLE OF PRODUCING HAIL...WINDS IN ESCESS OF 50 MILES AN HOUR... AND DANGEROUS LIGHTNING. THESE STORMS WERE PART OF A GROWING COMPLEX OF SCATTERED THUNDERSTORMS AND SHOWERS THAT COVERED MUCH OF THE STATE. STRONG STORMS WERE ALSO DETECTED OVER NORTHEAST IOWA BETWEEN WATERLOO AND PRAIRIE DU CHIEN WISCONSIN...AND OVER SOUTHWEST AND WEST CENTRAL IOWA BETWEEN WEBSTER CITY AND BEDFORD. WEBSTER CITY IS 60 MILES NORTH OF DES MOINES AND BEDFORD IS 80 MILES SOUTHWEST OF DES MnOINES. / THESE STORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR. MILLER
Special weather statement, Aug 25, 3:41 PM CDT, 1 hour 35 minutes before
IAZ051-049-050-252145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 341 PM CDT TUE AUG 25 1992 THE NATIONAL WEATHER SERVICE IN DES MOINES RECEIVED TWO REPORTS OF WIND DAMAGE IN EXTREME NORTHEAST TAMA COUNTY. THE DYSART POLICE DEPARTMENT REPORTED A STORM WHICH PRODUCED 60 MPH WINDS AND STREET FLOODING. DYSART IS 25 MILES SOUTH OF WATERLOO. THE BENTON COUNTY SHERIFF ALSO REPORTED TREE DAMAGE NEAR DYSART. BOTH REPORTS WERE AROUND 315 PM CDT. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PARTS OF NORTHEAST IOWA UNTIL 9 PM CDT. BURKE
Special weather statement, Aug 25, 3:49 PM CDT, 1 hour 27 minutes before
IAZALL-252150- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 347 PM CDT TUE AUG 25 1992 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR EASTERN IOWA THIS TUESDAY AFTERNOON AND EVENING UNTIL 9 PM CDT... AT 331 PM...AN AREA OF VERY STRONG THUNDERSTORMS WITH VERY HEAVY RAINS WAS 15 MILES WIDE AND CENTERED ALONG A LINE FROM 40 MILES EAST OF DES MOINES NEAR MONTEZUMA TO 15 MILES SOUTHEAST OF WATERLOO IN SOUTHEAST BLACK HAWK COUNTY. THESE STORMS ARE CAPABLE OF PRODUCING WIND GUSTS OF 50 TO 60 MILES AN HOUR...BRIEF VERY HEAVY RAIN...AND DANGEROUS LIGHTNING. THESE STORMS WERE PART OF A GROWING COMPLEX OF SCATTERED THUNDERSTORMS AND SHOWERS THAT COVERED MUCH OF THE STATE. OTHER WIDELY SCATTERED THUNDERSTORMS WITH HEAVY RAIN WERE LOCATED EAST OF LINE FROM LAMONI TO TO 40 MILES WEST OF MASON CITY NEAR ALGONA. THE STORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR. / RICHTER
Special weather statement, Aug 25, 4:09 PM CDT, 1 hour 7 minutes before
IAZ006>011-016>019-026>029-038>040-252200- SPECIAL WEATHER STATEMENT/SHORT RANGE FORECAST FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 410 PM CDT TUE AUG 25 1992 ...SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS MANY PARTS OF NORTHEAST IOWA THIS AFTERNOON WITH LOCALLY HEAVY RAINS... THUNDERSTORMS WITH SOME OCCASIONAL HEAVY RAIN WILL MOVE THROUGH PARTS OF NORTHEAST IOWA THIS AFTERNOON. A CLUSTER OF THUNDERSTORMS WILL AFFECT THE INDEPENDENCE...JESUP...PARKERSBURG...AND SUMNER AREAS BETWEEN 415PM AND 5PM. THESE STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. TEMPERATURES OVER NORTH CENTRAL AND NORTHEAST IOWA WILL SHOW A WIDE RANGE FROM THE LOW 60S TO THE LOWER 70S WITH WEST T<O NORTHWEST WINDS 10 TO 20 MILES AN HOUR...HOWEVER THEY WILL BE STRONGER NEAR THUNDERSTORMS. SSL
Special weather statement, Aug 25, 4:50 PM CDT, 26 minutes before
IAZALL-252250- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 448 PM CDT TUE AUG 25 1992 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR EASTERN IOWA THIS TUESDAY AFTERNOON AND EVENING UNTIL 9 PM CDT... AT 430 PM...AN AREA OF SCATTERED THUNDERSTORMS WAS OVER EASTERN IOWA ...EAST OF A LINE FROM MASON CITY TO LAMONI. THE STRONGEST STORMS WERE OCCURRING BETWEEN GRINNELL AND OSKALOOSA. GRINNELL IS 40 MILES EAST OF DES MOINES AND OSKALOOSA IS 15 MILES NORTHEAST OF OTTUMWA. THESE STORMS ARE CAPABLE OF PRODUCING WIND GUSTS OF 50 TO 60 MILES AN HOUR... PEA SIZE HAIL...BRIEF VERY HEAVY RAIN...AND DANGEROUS LIGHTNING. WITH THE HEAVY RAINS...STREET FLOODING IS POSSIBLE. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOU TO CROSS SAFELY. THE STORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR. / RICHTER
Special weather statement, Aug 25, 5:01 PM CDT, 15 minutes before
IAZ006>011-016>019-026>029-038>040-252300- SPECIAL WEATHER STATEMENT/SHORT RANGE FORECAST FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 500 PM CDT TUE AUG 25 1992 ...SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS MANY PARTS OF NORTHEAST IOWA EARLY THIS EVENING WITH LOCALLY HEAVY RAINS... SHOWERS AND THUNDERSTORMS WITH SOME BRIEF HEAVY RAINS WILL MOVE THROUGH PARTS OF NORTHEAST IOWA EARLY THIS EVENING. A CLUSTER OF SHOWERS AND ISOLATED THUNDERSTORMS WILL AFFECT THE WATERLOO/CEDAR FALLS ...JESUP...PARKERSBURG AND OELWEIN AREAS BETWEEN 5 AND 6PM. THESE SHOWERS AND THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. TEMPERATURES OVER NORTH CENTRAL AND NORTHEAST IOWA WILL SHOW A WIDE RANGE FROM THE LOW 60S IN THE WEST TO THE LOWER 70S TO THE EAST WITH WEST TO NORTHWEST WINDS AT 10 TO 20 MILES AN HOUR...STRONGER GUSTS OCCURING NEAR THE SHOWERS AND ISOLATED THUNDERSTORMS. TRS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 1:37 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Buchanan, Fayette | 53 min |
| Aug 25, 2:36 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 44 min |
| Aug 25, 3:23 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 52 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1992Every severe thunderstorm warning in 1992
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.