Alert archive / Iowa / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 192, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 31, 1993, 11:38 AM CDT for Poweshiek County, Tama County, Iowa. It was in force for 33 min.
The area
The counties it named.
The facts
- Issued
- Jul 31, 1993, 11:38 AM CDT (16:38 UTC)
- Expired
- Jul 31, 1993, 12:11 PM CDT
- In force
- 33 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Poweshiek County, IA, Tama County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 4.6 hours before the alert went out and 341 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
- 3174 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 546 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.5
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, Jul 31, 10:54 AM CDT, 44 minutes before
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</html>Local storm report, Jul 31, 11:00 AM CDT, 38 minutes before
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</html>Local storm report, Jul 31, 11:01 AM CDT, 37 minutes before
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</html>Special weather statement, Jul 31, 11:07 AM CDT, 31 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-311715- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1107 AM CDT SAT JUL 31 1993 ...THUNDERSTORMS CONTINUE TO RUMBLE THROUGHOUT NORTHEAST AND NORTH CENTRAL IOWA... AT 11AM...A LINE OF THUNDERSTORMS PRODUCING VERY HEAVY RAINS...WINDS UP TO 35 MILES AN HOUR...AND FREQUENT DEADLY LIGHTNING WERE LOCATED FROM 25 MILES SOUTH OF MASON CITY NEAR THE TOWN OF HAMPTON...TO 35 MILES SOUTHWEST OF WATERLOO NEAR MARSHALLTOWN. AS THESE STORMS MOVE TO THE SOUTHEAST AT 25 TO 30 MILES AN HOUR...THEY WILL AFFECT THE TOWNS OF HAMPTON...PARKERSBURG...WATERLOO...CEDAR FALLS...GRUNDY CENTER...HUDSON...LA PORTE CITY...AND NEW HARTFORD. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 2 PM FOR NORTHEAST AND NORTH CENTRAL IOWA. CONDITIONS IN THIS WATCH AREA ARE FAVORABLE FOR SEVERE THUNDERSTORM DEVELOPMENT AND PERSONS IN THIS AREA SHOULD BE ON THE LOOKOUT FOR THE POSSIBILITY OF SEVERE STORMS. CONTINUE TO MONITOR THE SITUATION THROUGH YOUR LOCAL TELEVISION STATION...RADIO...OR NOAA WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE THUNDERSTORM WARNINGS. LINDENBERG
Special weather statement, Jul 31, 11:08 AM CDT, 30 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-311715- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1107 AM CDT SAT JUL 31 1993 ...THUNDERSTORMS CONTINUE TO RUMBLE THROUGHOUT NORTHEAST AND NORTH CENTRAL IOWA... AT 11AM...A LINE OF THUNDERSTORMS PRODUCING VERY HEAVY RAINS...WINDS UP TO 35 MILES AN HOUR...AND FREQUENT DEADLY LIGHTNING WERE LOCATED FROM 25 MILES SOUTH OF MASON CITY NEAR THE TOWN OF HAMPTON...TO 35 MILES SOUTHWEST OF WATERLOO NEAR MARSHALLTOWN. AS THESE STORMS MOVE TO THE SOUTHEAST AT 25 TO 30 MILES AN HOUR...THEY WILL AFFECT THE TOWNS OF HAMPTON...PARKERSBURG...WATERLOO...CEDAR FALLS...GRUNDY CENTER...HUDSON...LA PORTE CITY...AND NEW HARTFORD. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 2 PM FOR NORTHEAST AND NORTH CENTRAL IOWA. CONDITIONS IN THIS WATCH AREA ARE FAVORABLE FOR SEVERE THUNDERSTORM DEVELOPMENT AND PERSONS IN THIS AREA SHOULD BE ON THE LOOKOUT FOR THE| POSSIBILITY OF SEVERE STORMS. CONTINUE TO MONITOR THE SITUATION THROUGH YOUR LOCAL TELEVISION STATION...RADIO...OR NOAA WEATHER RADIO FOR FURTHER UPDATES AND POSSIBLE THUNDERSTORM WARNINGS. LINDENBERG
Special weather statement, Jul 31, 11:38 AM CDT, 0 minutes before
IAZALL-311740-
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
1138 AM CDT SAT JUL 31 1993
...SEVERE THUNDERSTORM WATCH FOR EASTERN THIRD UNTIL 200 PM...
AT 1125 AM CDT...A 20 MILE WIDE LINE OF INTENSE THUNDERSTORMS
EXTENDED FROM 25 MILES WEST OF DES MOINES...NEAR REDFIELD SOUTHEAST
THROUGH WINTERSET TO NEAR INDIANOLA THEN NORTHEAST TO THE NEWTON
AND GRINNELL AREAS. INDIANOLA 15 MILES SOUTH OF DES MOINES...NEWTON
IS 30 MILES EAST OF DES MOINES WHILE GRINNELL IS 45 MILES EAST OF
DES MOINES. ANOTHER INTENSE STORM WAS OVER NORTH CENTRAL IOWA SOME
40 MILES WEST OF MASON CITY NEAR ALGONA.
THE STORMS IN THIS AREA WILL PRODUCE EXTREMELY HEAVY RAIN...HAIL
...NEARLY CONTINUOUS DEADLY LIGHTNING AND STRONG GUSTY WINDS.
THESE STORMS WERE PART OF A MUCH LARGER AREA OF SHOWERS AND STORMS
EAST OF A LINE FROM CLARINDA NORTHEAST TO NEAR ALGONA. CLARINDA IS
80 MILES SOUTHWEST OF DES MOINES.
THE INDIVIDUAL STORMS WERE MOVING EAST AT 25 MILES AN HOUR WHILE THE
AREA OF SHOWERS AND STORMS WERE SAGGING SOUTHEAST.
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610 OCNL C25 BKNQ6WWUSThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 5:08 AM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer | 52 min |
| Jul 31, 6:19 AM CDT | Flash Flood Warning | DMX | Benton, Linn | 56 min |
| Jul 31, 6:19 AM CDT | Severe Thunderstorm Warning | DMX | Benton, Linn | 56 min |
| Jul 31, 7:05 AM CDT | Severe Thunderstorm Warning | DMX | Benton | 45 min |
| Jul 31, 7:23 AM CDT | Flash Flood Warning | DMX | Benton | 3 hr |
| Jul 31, 7:40 AM CDT | Severe Thunderstorm Warning | DMX | Linn | 35 min |
| Jul 31, 8:15 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 45 min |
| Jul 31, 8:25 AM CDT | Severe Thunderstorm Warning | DMX | Franklin | 65 min |
| Jul 31, 8:56 AM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Hardin | 34 min |
| Jul 31, 9:10 AM CDT | Severe Thunderstorm Warning | DMX | Chickasaw | 27 min |
| Jul 31, 9:19 AM CDT | Severe Thunderstorm Warning | DMX | Greene | 41 min |
| Jul 31, 9:30 AM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Hardin | 60 min |
| Jul 31, 9:51 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Webster | 44 min |
| Jul 31, 10:42 AM CDT | Severe Thunderstorm Warning | DMX | Story | 27 min |
| Jul 31, 11:02 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall | 30 min |
| Jul 31, 11:12 AM CDT | Severe Thunderstorm Warning | DMX | Marion, Warren | 48 min |
| Jul 31, 11:52 AM CDT | Severe Thunderstorm Warning | DMX | Wright | 52 min |
| Jul 31, 12:00 PM CDT | Severe Thunderstorm Warning | DMX | Benton, Iowa | 30 min |
| Jul 31, 12:08 PM CDT | Flash Flood Warning | DMX | Johnson, Linn | 67 min |
| Jul 31, 12:08 PM CDT | Severe Thunderstorm Warning | DMX | Johnson, Linn | 67 min |
| Jul 31, 12:16 PM CDT | Flash Flood Warning | DMX | Hardin | 59 min |
| Jul 31, 12:16 PM CDT | Severe Thunderstorm Warning | DMX | Hardin | 59 min |
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.