Alert archive / Iowa / Tornado Warnings in 1993
Tornado Warning 9, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 7, 1993, 6:34 PM CDT for O'Brien County, Iowa. It was in force for 26 min.
The area
The counties it named.
The facts
- Issued
- Jun 7, 1993, 6:34 PM CDT (23:34 UTC)
- Expired
- Jun 7, 1993, 7:00 PM CDT
- In force
- 26 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County O'Brien County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.6 hours before the alert went out and 206 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
- 2453 J/kg
- Mixed-layer CIN
- -268 J/kg
- Mixed-layer LCL
- 691 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 506 m²/s²
- 0-3 km storm-relative helicity
- 464 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 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, Jun 7, 5:17 PM CDT, 1 hour 17 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-072330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 516 PM CDT MON JUN 7 1993 ...THUNDERSTORMS ARE STILL POSSIBLE THIS EVENING... SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE TO DEVELOP AND MOVE RAPIDLY NORTHEAST THROUGH THE AREA. SOME OF THESE STORMS COULD BECOME SEVERE. AS A RESULT...A TORNADO WATCH REMAINS IN EFFECT UNITL 8 PM. IN ADDITION WINDS SHOULD BECOME WEST AND REMAIN GUSTY AT 20 TO 30 MILES AN HOUR. STONGER WINDS CAN BE EXPECTED NEAR THUNDERSTORMS. HUMPHREY
Special weather statement, Jun 7, 6:01 PM CDT, 33 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-080030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 601 PM CDT MON JUN 7 1993 ...THUNDERSTORMS WERE OCCURRING EAST OF SIOUX CITY... AT 559 PM CDT THUNDERSTORMS EXTENDED EAST OF SIOUX CITY OR FROM NEAR REMSEN TO ONAWA IOWA. MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR. THE THUNDERSTORMS WILL EXTEND FROM NEAR PRIMGHAR TO HOLSTEIN IOWA... 45 MILES EAST OF SIOUX CITY BY 7 PM. THE STORMS MAY BECOME SEVERE...SO A TORNADO WATCH REMAINS IN EFFECT UNTIL 8 PM AND A FLASH FLOOD WATCH IS IN EFFECT FOR TONIGHT. HOPPES
Special weather statement, Jun 7, 6:01 PM CDT, 33 minutes before
IAZ013-020-021-031-032-043-NEZ094>096-SDZ066-080030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 601 PM CDT MON JUN 7 1993 ...THUNDERSTORMS WERE OCCURRING EAST OF SIOUX CITY... AT 559 PM CDT THUNDERSTORMS EXTENDED EAST OF SIOUX CITY OR FROM NEAR REMSEN TO ONAWA IOWA. MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR. THE THUNDERSTORMS WILL EXTEND FROM NEAR PRIMGHAR TO HOLSTEIN IOWA... 45 MILES EAST OF SIOUX CITY BY 7 PM. THE STORMS MAY BECOME SEVERE...SO A TORNADO WATCH REMAINS IN EFFECT UNTIL 8 PM AND A FLASH FLOOD WATCH IS IN EFFECT FOR TONIGHT. HOPPES
Special weather statement, Jun 7, 6:11 PM CDT, 23 minutes before
SDZ003-004-005-012-018-080000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 610 PM CDT MON JUN 7 1993 ...TORNADO WATCH NUMBER 356 IS CANCELED SOUTH OF A LINE FROM MOBRIDGE TO BROOKINGS... TORNADO WATCH NUMBER 356 IS CANCELED SOUTH OF A LINE FROM MOBRIDGE TO BROOKINGS. HOWEVER...THE TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF NORTHEAST SOUTH DAKOTA. THOSE COUNTIES STILL IN THE WATCH INCLUDE EDMONDS...SPINK...BROWN...WALWORTH...CAMPBELL...MCPHERSON...MARSHALL... DAY...ROBERTS...GRANT...CODINGTON...CLARK...DUELE...HAMLIN...AND BROOKINGS. PEOPLE IN NORTHEAST SOUTH DAKOTA...SOUTHWEST MINNESOTA...AND NORTHWEST IOWA SHOULD CONTINUE TO CLOSELY MONITOR THE WEATHER THIS EVEN ING.
Local storm report, Jun 7, 6:25 PM CDT, 9 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
625 PM CDT MON JUN 7 1993
STORM DATA FOR MONDAY JUNE 7 1993
TIME COUNTY...LOCATION AND STATE CHARACTER OF STORM...DAMAGE
.......................................................................
340 PM CDT HANSON...12 MILES NORTH OF FARMER TORNADO
407 PM CDT
422 PM CDT MCCOOK...NEAR SPENCER TORNADO
423 PM CDT MCCOOK...8 MILES NORTHEAST OF SALEM TORNADO (1/2 MILE
WIDE...9 MILE PATH DAMAGED A
COMBINE AND DOWNED
POWER LINES)
450 PM CDT LAKE COUNTY...5 EAST OF MADISON UNCONFIRMED TORNADO
DOWNED POWER LINES
450 PM CDT MINNEHAHA...2 SOUTH OF COLTON TORNADO CAUSED SEVERAL
INJURIES AND DOWNEDLocal storm report, Jun 7, 6:26 PM CDT, 8 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
625 PM CDT MON JUN 7 1993
STORM DATA FOR MONDAY JUNE 7 1993
TIME COUNTY...LOCATION AND STATE CHARACTER OF STORM...DAMAGE
.......................................................................
340 PM CDT HANSON...12 MILES NORTH OF FARMER TORNADO
407 PM CDT
422 PM CDT MCCOOK...NEAR SPENCER TORNADO
423 PM CDT MCCOOK...8 MILES NORTHEAST OF SALEM TORNADO (1/2 MILE
WIDE...9 MILE PATH DAMAGED A
COMBINE AND DOWNED
POWER LINES)
450 PM CDT LAKE COUNTY...5 EAST OF MADISON & UNCONFIRMED TORNADO
DOWNED POWER LINES
450 PM CDT MINNEHAHA...2 SOUTH OF COLTON TORNADO CAUSED SEVERAL
INJURIES AND DOWNEDThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 3:52 AM CDT | Severe Thunderstorm Warning | FSD | Osceola | 38 min |
| Jun 7, 4:21 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 19 min |
| Jun 7, 4:35 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 40 min |
| Jun 7, 4:50 AM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 25 min |
| Jun 7, 5:33 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 32 min |
| Jun 7, 6:39 PM CDT | Tornado Warning | FSD | O'Brien | 21 min |
| Jun 7, 6:44 PM CDT | Tornado Warning | FSD | Lyon, Sioux | 21 min |
| Jun 7, 6:50 PM CDT | Tornado Warning | FSD | Osceola | 25 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.