Alert archive / Iowa / Severe Thunderstorm Warnings in 1988
Severe Thunderstorm Warning 8, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 7, 1988, 7:45 PM CDT for Crawford County, Sac County, Iowa. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- May 7, 1988, 7:45 PM CDT (00:45 UTC)
- Expired
- May 7, 1988, 8:15 PM CDT
- In force
- 30 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Crawford County, IA, Sac 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, 0.8 hours before the alert went out and 136 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
- 3512 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 185 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, May 7, 2:53 PM CDT, 4 hours 52 minutes before
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</html>Special weather statement, May 7, 3:46 PM CDT, 3 hours 59 minutes before
SPECIAL WEATHER STATMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 340 PM CDT SAT MAY 7 1988 ...TORNADO WATCH FOR EXTREME NORTHWEST IOWA UNTIL 7 PM... AT 330 PM CDT... AN INTENSE THUNDERSTORM WAS LOCATED OVER CENTRAL IOWA...10 MILES NORTH/ EAST OF NEWTON. HAIL...HIGH WINDS AND BRIEF HEAVY ARE POSSIBILE FROM THIS STORM AS IT MOVES NORTHEAST AT 50 MILES AN HOUR. STRONG THUNDERSTORMS WERE OCCURRING FROM SOUTH CENTRAL INTO CENTRAL IOWA. THESE STORMS WERE LOCATED FROM JUST NORTHEAST OF LAMONI NEAR HUMESTON TO SOUTHEAST OF NEWTON. ALL OF THE STORMS IN THIS AREA ARE CAPABLE OF PRODUCING BRIEF HEAVY RAINS AND SOME SMALL HAIL AS THEY MOVE NORTHEAST AT AROUND 50 MILES AN HOUR. FERRY
Special weather statement, May 7, 4:14 PM CDT, 3 hours 31 minutes before
SPECIAL WEATHER STATMENT NATIONAL WEATHER SERVICE DES MOINES IA 410 PM CDT SAT MAY 7 1988 ...TORNADO WATCH FOR EXTREME NORTHWEST IOWA UNTIL 7 PM... STRONG THUNDERSTORMS WERE OCCURRING FROM SOUTH CENTRAL INTO NORTHEAST IOWA. AT 400 PM THUNDERSTORMS WERE LOCATED FROM 30 MILES SOUTHEAST OF DES MOINES NEAR MELCHER TO WATERLOO. THE STRONGEST STORMS WERE LOCATED OVER WATERLOO AND 20 MILES SOUTHEAST OF MARSHALLTOWN NEAR TOLEDO. THESE STORMS HAVE BEEN PRODUCING SOME PEA SIZE HAIL. STRONG WINDS AND BRIEF HEAVY RAINS ARE ALSO POSSIBLE FROM THE STORMS. THE THUNDERSTORMS WERE MOVING NORTHEAST AT 50 MILES AN HOUR. FERRY
Special weather statement, May 7, 5:13 PM CDT, 2 hours 32 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 515 PM CDT SAT MAY 7 1988 THE TORNADO WATCH FOR EXTREME NORTHWEST IOWA HAS BEEN CANCELLED. THUNDERSTORMS HAVED MOVED NORTH OUT OF IOWA INTO MINNESOTA. A NEW TORNADO WATCH HAS BEEN ISSUED FOR MUCH OF SOUTH CENTRAL AND WESTERN MINNESOTA TIL 11PM CDT. THE TORNADO WATCH THAT WAS IN EFFECT FOR NORTHWEST MISSOURI HAS ALSO BEEN CANCELLED. ADAMS
Special weather statement, May 7, 5:15 PM CDT, 2 hours 30 minutes before
SPECIAL WEATHER STATMENT NATIONAL WEATHER SERVICE DES MOINES IA 515 PM CDT SAT MAY 7 1988 STRONG THUNDERSTORMS WERE OCCURRING OVER NORTH CENTRAL IOWA. AT 500 PM THUNDERSTORMS WERE INDICATED OVER EXTREME NORTH CENTRAL IOWA FROM JUST WEST OF MASON CITY NEAR BRITT TO THE IOWA/MINNESOTA BORDER NORTH OF BUFFALO CENTER. THESE THUNDERSTORMS PRODUCED SOME MARBLE SIZE HAIL AROUND 450 PM AT BRITT. BRIEF HEAVY RAINS AND STRONG GUSTY WINDS ARE ALSO POSSIBLE FROM THESE STORMS AS THEY MOVE NORTHEAST AT 50 MILES AN HOUR. THE PRECIPITATION OVER EAST CENTRAL AND NORTHEAST IOWA HAS DECREASED CONSIDERABLY IN INTENSITY. NUMEROUS SHOWERS AND SCATTERED THUNDER/ SHOWERS WERE OCCURRING FROM JUST SOUTH OF CEDAR RAPIDS NORTHEAST TO NEAR DECORAH. THESE SHOWERS AND THUNDERSHOWERS WERE ALSO MOVING NORTHEAST AT 50 MILES AN HOUR. FERRY
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 8:20 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Sac | 25 min |
| May 7, 8:35 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 40 min |
| May 7, 8:50 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas | 40 min |
| May 7, 9:05 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt | 35 min |
| May 7, 9:30 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 20 min |
| May 7, 9:31 PM CDT | Severe Thunderstorm Warning | DMX | Crawford, Sac | 44 min |
| May 8, 12:02 AM CDT | Severe Thunderstorm Warning | DMX | Crawford | 43 min |
| May 8, 4:38 AM CDT | Severe Thunderstorm Warning | DMX | Humboldt | 37 min |
| May 8, 9:42 AM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Taylor | 33 min |
| May 8, 10:26 AM CDT | Severe Thunderstorm Warning | DMX | Ringgold, Taylor | 34 min |
| May 8, 11:08 AM CDT | Severe Thunderstorm Warning | DMX | Madison | 52 min |
| May 8, 11:20 AM CDT | Severe Thunderstorm Warning | DMX | Clarke, Warren | 70 min |
| May 8, 11:41 AM CDT | Severe Thunderstorm Warning | DMX | Polk | 49 min |
| May 8, 11:44 AM CDT | Severe Thunderstorm Warning | DMX | Franklin | 61 min |
| May 8, 12:01 PM CDT | Tornado Warning | DMX | Jasper | 29 min |
| May 8, 12:15 PM CDT | Tornado Warning | DMX | Jasper | 45 min |
| May 8, 12:25 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 65 min |
| May 8, 12:34 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 41 min |
| May 8, 12:43 PM CDT | Severe Thunderstorm Warning | DMX | Clarke | 32 min |
| May 8, 12:55 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 50 min |
| May 8, 12:58 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Marion, Warren | 47 min |
| May 8, 1:24 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 36 min |
| May 8, 1:25 PM CDT | Severe Thunderstorm Warning | DMX | Marion | 35 min |
| May 8, 1:33 PM CDT | Tornado Warning | DMX | Poweshiek | 27 min |
| May 8, 1:40 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 50 min |
| May 8, 2:01 PM CDT | Tornado Warning | DMX | Iowa, Poweshiek | 29 min |
| May 8, 2:11 PM CDT | Tornado Warning | DMX | Keokuk, Mahaska | 49 min |
| May 8, 2:23 PM CDT | Severe Thunderstorm Warning | DMX | Buchanan, Fayette | 42 min |
| May 8, 2:35 PM CDT | Tornado Warning | DMX | Iowa | 30 min |
| May 8, 2:35 PM CDT | Tornado Warning | DMX | Johnson | 40 min |
| May 8, 3:00 PM CDT | Tornado Warning | DMX | Washington | 30 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1988Every severe thunderstorm warning in 1988
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.