Alert archive / Iowa / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 103, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 29, 1993, 8:01 PM CDT for 4 counties in Iowa. It was in force for 29 min.
The area
The counties it named.
The facts
- Issued
- Jun 29, 1993, 8:01 PM CDT (01:01 UTC)
- Expired
- Jun 29, 1993, 8:30 PM CDT
- In force
- 29 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Hamilton County, IA, Humboldt County, IA, Webster County, IA, Wright County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 1.0 hours before the alert went out and 244 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
- 3751 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1148 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 2.6
- Supercell composite
- 16.2
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 29, 6:43 PM CDT, 1 hour 18 minutes before
IAZALL-300040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 643 PM CDT TUE JUN 29 1993 ...A TORNADO WATCH IS IN EFFECT FOR MUCH OF THE NORTH HALF OF IOWA UNTIL 11 PM. ...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHWEST IOWA UNTIL MIDNIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHEAST IOWA TONIGHT... AT 630 PM CDT...ISOLATED INTENSE THUNDERSTORMS WERE OCCURRING IN A 15 MILE WIDE BAND EXTENDING FROM 25 MILES SOUTHWEST OF SPENCER NEAR CHEROKEE...TO 20 MILES NORTHWEST OF MASON CITY. OTHER INTENSE STORMS WERE LOCATED 15 MILES SOUTHEAST OF MASON CITY...AND 25 MILES EAST OF MASON CITY NEAR CHARLES CITY. THESE STORMS WERE PRODUCING TORRENTIAL RAINFALL...GUSTY WINDS...HAIL AND NEARLY CONTINUOUS LIGHTNING. THE STORMS WERE OCCURRING IN AN AREA OF SHOWERS AND STORMS NORTH OF A LINE FROM 20 MILES NORTHEAST OF SIOUX CITY NEAR LE MARS...TO NEAR WATERLOO. SCATTERED SHOWERS AND A FEW THUNDERSTORMS WERE ALSO OCCURRING IN A 30 MILE WIDE BAND FROM 30 MILES WEST OF WATERLOO NEAR ACKLEY...TO 15 MILES NORTHWEST OF OTTUMWA NEAR OSKALOOSA. THE STORMS AND SHOWERS WERE MOVING EAST SOUTHEAST AT 40 MILES AN HOUR. JAK/BRF
Special weather statement, Jun 29, 6:43 PM CDT, 1 hour 18 minutes before
IAZALL-300040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 643 PM CDT TUE JUN 29 1993 ...A TORNADO WATCH IS IN EFFECT FOR MUCH OF THE NORTH HALF OF IOWA UNTIL 11 PM. ...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHWEST IOWA UNTIL MIDNIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHEAST IOWA TONIGHT... AT 630 PM CDT...ISOLATED INTENSE THUNDERSTORMS WERE OCCURRING IN A 15 MILE WIDE BAND EXTENDING FROM 25 MILES SOUTHWEST OF SPENCER NEAR CHEROKEE...TO 20 MILES NORTHWEST OF MASON CITY. OTHER INTENSE STORMS WERE LOCATED 15 MILES SOUTHEAST OF MASON CITY...AND 25 MILES EAST OF MASON CITY NEAR CHARLES CITY. THESE STORMS WERE PRODUCING TORRENTIAL RAINFALL...GUSTY WINDS...HAIL AND NEARLY CONTINUOUS LIGHTNING. THE STORMS WERE OCCURRING IN AN AREA OF SHOWERS AND STORMS NORTH OF A LINE FROM 20 MILES NORTHEAST OF SIOUX CITY NEAR LE MARS...TO NEAR WATERLOO. SCATTERED SHOWERS AND A FEW THUNDERSTORMS WERE ALSO OCCURRING IN A 30 MILE WIDE BAND FROM 30 MILES WEST OF WATERLOO NEAR ACKLEY...TO 15 MILES NORTHWEST OF OTTUMWA NEAR OSKALOOSA. THE STORMS AND SHOWERS WERE MOVING EAST SOUTHEAST AT 40 MILES AN HOUR. JAK/BRF
Special weather statement, Jun 29, 7:00 PM CDT, 1 hour 1 minute before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-300130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 700 PM CDT TUE JUN 29 1993 ...THUNDERSTORMS ACROSS NORTH CENTRAL AND NORTHEAST IOWA WERE PRODUCING VERY HEAVY RAINS... AT 700 PM STRONG THUNDERSTORMS WERE MOVING INTO THE MASON CITY METRO AREA. THESE THUNDERSTORMS HAVE PRODUCED VERY HEAVY RAINS... HAIL...GUSTY WINDS 35 TO 40 MILES AN HOUR AND LIGHTNING. THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR AND WILL AFFECT THE MASON CITY METRO AREA AS WELL AS NORTHWOOD...MANLY AND CLEAR LAKE AREAS. GENERAL THUNDERSTORMS DOTTED THE REST OF NORTH CENTRAL AND NORTHEAST IOWA WEST OF HIGHWAY 150. THESE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. A TORNADO WATCH IS IN EFFECT UNTIL 11PM FOR ALL OF NORTH CENTRAL AND NORTHEAST IOWA. THIS IS A DANGEROUS WEATHER SITUATION AND MUST BE MONITORED CLOSELY. PEOPLE SHOULD TUNE IN THE RADIO...TV AND WEATHER RADIO FOR THE LATEST STORM INFORMATION. RR
Special weather statement, Jun 29, 7:08 PM CDT, 53 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-300130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 700 PM CDT TUE JUN 29 1993 ...THUNDERSTORMS ACROSS NORTH CENTRAL AND NORTHEAST IOWA WERE PRODUCING VERY HEAVY RAINS... AT 700 PM STRONG THUNDERSTORMS WERE MOVING INTO THE MASON CITY METRO AREA. THESE THUNDERSTORMS HAVE PRODUCED VERY HEAVY RAINS... HAIL...GUSTY WINDS 35 TO 40 MILES AN HOUR AND LIGHTNING. THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR AND WILL AFFECT THE MASON CITY METRO AREA AS WELL AS NORTHWOOD...MANLY AND CLEAR LAKE AREAS. GENERAL THUNDERSTORMS DOTTED THE REST OF NORTH CENTRAL AND NORTHEAST IOWA WEST OF HIGHWAY 150. THESE THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. A TORNADO WATCH IS IN EFFECT UNTIL 11PM FOR ALL OF NORTH CENTRAL AND NORTHEAST IOWA. THIS IS A DANGEROUS WEATHER SITUATION AND MUST BE MONITORED CLOSELY. PEOPLE SHOULD TUNE IN THE RADIO...TV AND WEATHER RADIO FOR THE LATEST STORM INFORMATION. RR
Special weather statement, Jun 29, 7:43 PM CDT, 18 minutes before
IAZALL-300140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 743 PM CDT TUE JUN 29 1993 ...A TORNADO WATCH IS IN EFFECT FOR MUCH OF THE NORTH HALF OF IOWA UNTIL 11 PM. ...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHWEST IOWA UNTIL MIDNIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHEAST IOWA TONIGHT... AT 732 PM CDT...INTENSE THUNDERSTORMS CONTINUED FROM NORTHWEST INTO NORTH CENTRAL IOWA. TH STORMS WERE LOCATED IN A 15 TO 20 MILE WIDE BAND EXTENDING FROM 35 MILES SOUTH OF SPENCER NEAR STORM LAKE...TO 10 MILES NORTHEAST OF MASON CITY NEAR MANLY. THESE STORMS CONTINUED TO PRODUCE TORRENTIAL RAINFALL...GUSTY WINDS...HAIL AND FREQUENT LIGHTNING. THE STORMS WERE LOCATED IN AND AREA OF STORMS AND SHOWERS GENERALLY NORTH OF A LINE FROM SIOUX CITY...TO FORT DODGE...TO NEAR DUBUQUE. OTHER SCATTERED SHOWERS WERE OCCURRING IN A 40 MILE WIDE AREA CENTERED FROM 20 MILES EAST OF WATERLOO NEAR INDEPENDENCE...TO 20 MILES NORTHEAST OF OTTUMWA NEAR RICHLAND. THE STORMS AND SHOWERS WERE MOVING EAST SOUTHEAST AT 40 MILES AN HOUR. JAK/BRF
Special weather statement, Jun 29, 7:43 PM CDT, 18 minutes before
IAZALL-300140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 743 PM CDT TUE JUN 29 1993 ...A TORNADO WATCH IS IN EFFECT FOR MUCH OF THE NORTH HALF OF IOWA UNTIL 11 PM. ...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHWEST IOWA UNTIL MIDNIGHT... ...A FLASH FLOOD WATCH IS IN EFFECT FOR A SMALL PART OF EXTREME NORTHEAST IOWA TONIGHT... AT 732 PM CDT...INTENSE THUNDERSTORMS CONTINUED FROM NORTHWEST INTO NORTH CENTRAL IOWA. TH STORMS WERE LOCATED IN A 15 TO 20 MILE WIDE BAND EXTENDING FROM 35 MILES SOUTH OF SPENCER NEAR STORM LAKE...TO 10 MILES NORTHEAST OF MASON CITY NEAR MANLY. THESE STORMS CONTINUED TO PRODUCE TORRENTIAL RAINFALL...GUSTY WINDS...HAIL AND FREQUENT LIGHTNING. THE STORMS WERE LOCATED IN AND AREA OF STORMS AND SHOWERS GENERALLY NORTH OF A LINE FROM SIOUX CITY...TO FORT DODGE...TO NEAR DUBUQUE. OTHER SCATTERED SHOWERS WERE OCCURRING IN A 40 MILE WIDE AREA CENTERED FROM 20 MILES EAST OF WATERLOO NEAR INDEPENDENCE...TO 20 MILES NORTHEAST OF OTTUMWA NEAR RICHLAND. THE STORMS AND SHOWERS WERE MOVING EAST SOUTHEAST AT 40 MILES AN HOUR. JAK/BRF
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 7:05 PM CDT | Tornado Warning | DMX | Humboldt, Pocahontas | 25 min |
| Jun 29, 7:18 PM CDT | Flash Flood Warning | DMX | Kossuth, Palo Alto, Pocahontas | 3 hr |
| Jun 29, 7:26 PM CDT | Severe Thunderstorm Warning | DMX | Winnebago | 24 min |
| Jun 29, 7:27 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 33 min |
| Jun 29, 7:34 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt | 26 min |
| Jun 29, 8:17 PM CDT | Tornado Warning | DMX | Calhoun, Greene | 28 min |
| Jun 29, 8:23 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 52 min |
| Jun 29, 8:38 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 37 min |
| Jun 29, 8:44 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer, Grundy | 46 min |
| Jun 29, 8:44 PM CDT | Tornado Warning | DMX | Calhoun | 31 min |
| Jun 29, 8:50 PM CDT | Tornado Warning | DMX | Boone, Greene | 25 min |
| Jun 29, 8:53 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Story | 52 min |
| Jun 29, 8:57 PM CDT | Tornado Warning | DMX | Crawford | 33 min |
| Jun 29, 9:01 PM CDT | Severe Thunderstorm Warning | DMX | Carroll, Sac | 29 min |
| Jun 29, 9:20 PM CDT | Tornado Warning | DMX | Jasper, Polk, Story | 25 min |
| Jun 29, 9:25 PM CDT | Severe Thunderstorm Warning | DMX | Buchanan, Fayette | 65 min |
| Jun 29, 9:28 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 32 min |
| Jun 29, 9:36 PM CDT | Severe Thunderstorm Warning | DMX | Benton, Tama | 54 min |
| Jun 29, 9:37 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Jasper, Polk | 68 min |
| Jun 29, 9:49 PM CDT | Severe Thunderstorm Warning | DMX | Marshall | 26 min |
| Jun 29, 10:00 PM CDT | Tornado Warning | DMX | Jasper, Polk | 26 min |
| Jun 29, 10:15 PM CDT | Flash Flood Warning | DMX | Boone | 96 min |
| Jun 30, 12:21 AM CDT | Flash Flood Warning | DMX | Decatur, Ringgold | 66 min |
| Jun 30, 3:01 PM CDT | Severe Thunderstorm Warning | DMX | Cass | 29 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.