Alert archive / Iowa / Tornado Warnings in 1993
Tornado Warning 28, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at Aug 9, 1993, 6:02 PM CDT for Chickasaw County, Iowa. It was in force for 28 min.
The area
The counties it named.
The facts
- Issued
- Aug 9, 1993, 6:02 PM CDT (23:02 UTC)
- Expired
- Aug 9, 1993, 6:30 PM CDT
- In force
- 28 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Chickasaw County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 11.0 hours before the alert went out and 224 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
- 1750 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 649 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KALO 092310 TORALO IAC037-092330- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE WATERLOO IA 602 PM CDT MON AUG 9 1993 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 630 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...CHICKASAW COUNTY AT 605 PM A TORNADO WAS REPORTED TO BE ON THE GROUND 4 MILES WEST OF NEW HAMPTON. THE TORNADO WAS MOVING TO THE EAST SOUTHEAST AT 20 MILES AN HOUR AND WILL BE AFFECTING THE TOWNS OF NEW HAMPTON...WALLER AND FREDERICKSBURG. DURING A TORNADO...THE SAFEST PLACE IS IN A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. AVOID WINDOWS. PABST/COLLAR &
What forecasters said that day
The local office's own words before this tornado 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, 3:12 PM CDT, 2 hours 50 minutes before
IAZ050>052-062>064-092100- SPECIAL WEATHER STATMENT NATIONAL WEATHER SERVICE DES MOINES IA 315 PM CDT MON AUG 9 1993 ...SEVERE THUNDERSTORM WATCH NUMBER 774 IS NO LONGER IN EFFECT FOR EASTERN IOWA... THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT FOR A PART OF EASTERN IOWA HAS BEEN CANCELLED. THUNDERSTORMS ARE EXPECTED TO REDEVELOP AFTER 7 PM THIS EVENING OVER PARTS OF EAST CENTRAL IOWA. SMITH
Special weather statement, Aug 9, 3:15 PM CDT, 2 hours 47 minutes before
IAZ050>052-062>064-092100- SPECIAL WEATHER STATMENT NATIONAL WEATHER SERVICE DES MOINES IA 315 PM CDT MON AUG 9 1993 ...SEVERE THUNDERSTORM WATCH NUMBER 774 IS NO LONGER IN EFFECT FOR EASTERN IOWA... THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT FOR A PART OF EASTERN IOWA HAS BEEN CANCELLED. THUNDERSTORMS ARE EXPECTED TO REDEVELOP AFTER 7 PM THIS EVENING OVER PARTS OF EAST CENTRAL IOWA. SMITH
Special weather statement, Aug 9, 5:40 PM CDT, 22 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, 19 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, 17 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, 10 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
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 9:03 AM CDT | Severe Thunderstorm Warning | DMX | Fayette | 57 min |
| Aug 9, 4:35 PM CDT | Severe Thunderstorm Warning | DMX | Winnebago | 50 min |
| Aug 9, 4:35 PM CDT | Severe Thunderstorm Warning | DMX | Worth | 55 min |
| Aug 9, 4:52 PM CDT | Severe Thunderstorm Warning | DMX | Howard, Mitchell | 68 min |
| Aug 9, 5:55 PM CDT | Severe Thunderstorm Warning | DMX | Chickasaw | 35 min |
| Aug 9, 6:19 PM CDT | Severe Thunderstorm Warning | DMX | Fayette | 46 min |
| Aug 9, 6:41 PM CDT | Severe Thunderstorm Warning | DMX | Winnebago | 49 min |
Nearby
Tornado Warnings in Iowa, 1993Every tornado warning in 1993Tornadoes 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.