Alert archive / Iowa / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 204, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Aug 9, 1993, 7:05 PM CDT for Worth County, Iowa. It was in force for 33 min.
The area
The counties it named.
The facts
- Issued
- Aug 9, 1993, 7:05 PM CDT (00:05 UTC)
- Expired
- Aug 9, 1993, 7:38 PM CDT
- In force
- 33 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Worth County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 0.1 hours before the alert went out and 166 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
- 490 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1739 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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, Aug 9, 5:40 PM CDT, 1 hour 25 minutes before
IAZALL-092340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 540 PM CDT MON AUG 9 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF THE NORTHERN HALF OF IOWA UNTIL 10 PM THIS EVENING... AT 530 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE WERE LOCATED OVER NORTH CENTRAL AND NORTHEAST IOWA. THESE THUNDERSTORMS WERE LOCATED NORTHEAST OF A LINE EXTENDING FROM THE MINNESOTA BORDER NORTH OF MASON CITY TO OELWEIN...20 MILES NORTHEAST OF WATERLOO. THE HEAVIEST THUNDERSTORMS WERE LOCATED JUST NORTH OF CHARLES CITY... ABOUT...40 MILES EAST OF MASON CITY. BRIEF PERIODS OF VERY HEAVY RAIN AND HAIL MAY BE EXPECTED WITH THE PASSAGE OF THESE THUNDERSTORMS. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR. SCOTT
Special weather statement, Aug 9, 5:43 PM CDT, 1 hour 22 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-092345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 545 PM CDT MON AUG 9 1993 ...SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM... THROUGH 615 PM INTENSE THUNDERSTORMS WILL AFFECT ALTA VISTA... JERICO...NEW HAMPTON...LAWLER AND PROTIVIN...25 MILES SOUTHWEST OF DECORAH. THESE STORMS WILL BE CAPABLE OF PRODUCING VERY HEAVY RAINS... SMALL HAIL AND GUSTY WINDS 30 TO 40 MPH. THESE STORMS SHOULD MOVE INTO THE CALMAR AND WEST UNION AREAS BY 630 PM. THESE STORMS MAY QUICKLY BECOME SEVERE SO PEOPLE ARE ADVISED TO REMAIN ALERT AND TAKE QUICK ACTION SHOULD SEVERE WEATHER OCCUR OR A WARNING BE ISSUED. OTHER INFORMATION... SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MITCHELL COUNTY UNTIL 6 PM. SEVERE THUNDERSTORM WARNING FOR WORTH COUNTY HAS EXPIRED. COLLAR
Special weather statement, Aug 9, 5:45 PM CDT, 1 hour 20 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-092345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 545 PM CDT MON AUG 9 1993 ...SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM... THROUGH 615 PM INTENSE THUNDERSTORMS WILL AFFECT ALTA VISTA... JERICO...NEW HAMPTON...LAWLER AND PROTIVIN...25 MILES SOUTHWEST OF DECORAH. THESE STORMS WILL BE CAPABLE OF PRODUCING VERY HEAVY RAINS... SMALL HAIL AND GUSTY WINDS 30 TO 40 MPH. THESE STORMS SHOULD MOVE INTO THE CALMAR AND WEST UNION AREAS BY 630 PM. THESE STORMS MAY QUICKLY BECOME SEVERE SO PEOPLE ARE ADVISED TO REMAIN ALERT AND TAKE QUICK ACTION SHOULD SEVERE WEATHER OCCUR OR A WARNING BE ISSUED. OTHER INFORMATION... SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR MITCHELL COUNTY UNTIL 6 PM. SEVERE THUNDERSTORM WARNING FOR WORTH COUNTY HAS EXPIRED. COLLAR
Special weather statement, Aug 9, 5:52 PM CDT, 1 hour 13 minutes before
IAZALL-092340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 540 PM CDT MON AUG 9 1993 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MUCH OF THE NORTHERN HALF OF IOWA UNTIL 10 PM THIS EVENING... AT 530 PM CDT...INTENSE THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL WERE WERE LOCATED OVER NORTH CENTRAL AND NORTHEAST IOWA. THESE THUNDERSTORMS WERE LOCATED NORTHEAST OF A LINE EXTENDING FROM THE MINNESOTA BORDER NORTH OF MASON CITY TO OELWEIN...20 MILES NORTHEAST OF WATERLOO. THE HEAVIEST THUNDERSTORMS WERE LOCATED JUST NORTH OF CHARLES CITY... ABOUT...40 MILES EAST OF MASON CITY. BRIEF PERIODS OF VERY HEAVY RAIN AND HAIL MAY BE EXPECTED WITH THE PAS*SAGE OF THESE THUNDERSTORMS. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MILES AN HOUR. SCOTT
Special weather statement, Aug 9, 6:40 PM CDT, 25 minutes before
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</html>Special weather statement, Aug 9, 6:41 PM CDT, 24 minutes before
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<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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<p id="message2">
Please try again in a few minutes.
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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 |
|---|---|---|---|---|
| Aug 9, 7:35 PM CDT | Severe Thunderstorm Warning | DMX | Buchanan | 55 min |
| Aug 9, 8:00 PM CDT | Flash Flood Warning | DMX | Chickasaw | 3 hr |
| Aug 9, 8:33 PM CDT | Severe Thunderstorm Warning | DMX | Linn | 42 min |
| Aug 9, 8:40 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 50 min |
| Aug 9, 10:40 PM CDT | Flash Flood Warning | DMX | Chickasaw | 2 hr |
| Aug 9, 10:48 PM CDT | Flash Flood Warning | DMX | Linn | 4 hr |
| Aug 9, 11:19 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 26 min |
| Aug 9, 11:19 PM CDT | Severe Thunderstorm Warning | DMX | Greene | 41 min |
| Aug 9, 11:31 PM CDT | Flash Flood Warning | DMX | Iowa | 3 hr |
Nearby
Severe Thunderstorm Warnings in Iowa, 1993Every severe thunderstorm warning in 1993
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.