Alert archive / Iowa / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 7, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 7, 1993, 4:50 AM CDT for O'Brien County, Iowa. It was in force for 25 min.
The area
The counties it named.
The facts
- Issued
- Jun 7, 1993, 4:50 AM CDT (09:50 UTC)
- Expired
- Jun 7, 1993, 5:15 AM CDT
- In force
- 25 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County O'Brien County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 9.8 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
- 645 J/kg
- Mixed-layer CIN
- -266 J/kg
- Mixed-layer LCL
- 547 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 191 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KSUX 070953 RRA SVRSUX IAC141-071015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX CITY IA 450 AM CDT MON JUN 7 1993 THE NATIONAL WEATHER SERVICE IN SIOUX CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 515 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHWEST IOWA ...OBRIEN COUNTY AT 450 AM CDT A SEVERE THUNDERSTORM WAS LOCATED 5 MILES SOUTH OF PAULLINA...50 MILES NORTHEAST OF SIOUX CITY. THE STORM WAS MOVING NORTHEAST AT 30 MILES AN HOUR AND WILL MOVE INTO CALUMET AND SUTHERLAND BY 515 AM. THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING...AND HEAVY RAINS THAT CAN QUICKLY FLOOD LOW LYING AREAS. IF YOU ARE IN THE PATH OF THIS STORM TAKE SHELTER IN A REINFORCED BUILDING IMMEDIATELY. ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY REPORTS OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE. IRELAND &
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 7, 3:40 AM CDT, 1 hour 10 minutes before
SDZ010-011-015-016-017-018-019-020-070940- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 340 AM CDT MON JUN 7 1993 ...SEVERE THUNDERSTORM WATCH SOUTHERN SOUTH DAKOTA UNTIL 700 AM CDT... AT 330 AM CDT...SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN AND HAIL...CONTINUED OVER PARTS OF CENTRAL AND EASTERN SOUTH DAKOTA. THESE STORMS WERE MOSTLY SOUTH OF A LINE FROM RIDGEVIEW/30 MILES SOUTHWEST OF MOBRIDGE TO REVILLO/25 MILES EAST OF WATERTOWN WITH THE STRONGEST STORMS LOCATED 5 MILES NORTHEAST OF VIVIAN/20 MILES SOUTH OF PIERRE... 5 MILES NORTHEAST OF HIGHMORE/35 MILES SOUTHEAST OF GETTYSBURG AND 10 MILES SOUTHWEST OF MADISON/30 MILES NORTHWEST OF SIOUX FALLS. THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...HAIL AND STRONG GUSTY WINDS. PERSONS IN CENTRAL AND EAST CENTRAL SOUTH DAKOTA SHOULD REMAIN ON THE ALERT FOR THREATENING WEATHER AND SEEK SHELTER IF SIGHTED. MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR. PFEIFFER [@G$^6WWUS #u6WWUS8 6WWUS0 7q4WSUSF> 0XWSUSZZ F>& $WWUS X}66WWUSL p #u6WWUS 6WWUS%6WWUS `D8 WUUS `WWUSh XR"WEPA 6WWUSH 3U^WSUSl T }66WWUS p%6WWUS `D8 WUUS XWOUS 6WWUSB 4 h>TWEPA ^gtztzVQ6WWUS: HQ}WWUSf Q6WWUSOF6WWUS\ X 4Z\q6WWUSR NING. HIGH 7 TO R"WEPA tc<6WWUS$ jI WUUSp p KM/H. TUESDKo WEPA\ |E. HIGH NEAR 8. XWOUS VQ6WWUS: Hh>TWEPA FPCN11 CWUL qI`WWUS, sHWWUS& bZ`WWUS4 ,S6WWUS> Q6WWUS
Special weather statement, Jun 7, 3:44 AM CDT, 1 hour 6 minutes before
SDZ010-011-015-016-017-018-019-020-070940- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 340 AM CDT MON JUN 7 1993 ...SEVERE THUNDERSTORM WATCH SOUTHERN SOUTH DAKOTA UNTIL 700 AM CDT... AT 330 AM CDT...SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN AND HAIL...CONTINUED OVER PARTS OF CENTRAL AND EASTERN SOUTH DAKOTA. THESE STORMS WERE MOSTLY SOUTH OF A LINE FROM RIDGEVIEW/30 MILES SOUTHWEST OF MOBRIDGE TO REVILLO/25 MILES EAST OF WATERTOWN WITH THE STRONGEST STORMS LOCATED 5 MILES NORTHEAST OF VIVIAN/20 MILES SOUTH OF PIERRE... 5 MILES NORTHEAST OF HIGHMORE/35 MILES SOUTHEAST OF GETTYSBURG AND 10 MILES SOUTHWEST OF MADISON/30 MILES NORTHWEST OF SIOUX FALLS. THESE STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN...HAIL AND STRONG GUSTY WINDS. PERSONS IN CENTRAL AND EAST CENTRAL SOUTH DAKOTA SHOULD REMAIN ON THE ALERT FOR THREATENING WEATHER AND SEEK SHELTER IF SIGHTED. MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR. PFEIFFER
Special weather statement, Jun 7, 4:01 AM CDT, 49 minutes before
IAZ013-020-SDZ066-071000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 401 AM CDT MON JUN 7 1993 ...STRONG THUNDERSTORMS LOCATED IN OBRIEN AND PLYMOUTH COUNTIES... AT 4 AM CDT STRONG THUNDERSTORMS WERE LOCATED 5 MILES WEST OF HARTLEY IN OBRIEN COUNTY...65 MILES NORTHEAST OF SIOUX CITY. THIS STORM WAS MOVING NORTHEAST AT 30 MILES AN HOUR AND WILL ENTER HARTLEY BY 410 AM. VERY HEAVY RAIN ALONG WITH FREQUENT LIGHTNING IS POSSIBLE. OTHER STRONG THUNDERSTORMS WERE LOCATED AT LE MARS AND 5 MILES EAST OF HINTON IN PLYMOUTH COUNTY. THESE STORMS WERE MOVING EAST AT 30 MILES AN HOUR AND WERE ALSO PRODUCING VERY HEAVY RAIN AND FREQUENT LIGHTNING. THE TOWNS OF REMSEN AND KINGSLEY SHOULD SEE THESE STORMS BY 430 AM. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR UNION COUNTY SOUTH DAKOTA UNTIL 7 AM. IRELAND
Special weather statement, Jun 7, 4:05 AM CDT, 45 minutes before
IAZ013-020-SDZ066-071000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 401 AM CDT MON JUN 7 1993 ...STRONG THUNDERSTORMS LOCATED IN OBRIEN AND PLYMOUTH COUNTIES... AT 4 AM CDT STRONG THUNDERSTORMS WERE LOCATED 5 MILES WEST OF HARTLEY IN OBRIEN COUNTY...65 MILES NORTHEAST OF SIOUX CITY. THIS STORM WAS MOVING NORTHEAST AT 30 MILES AN HOUR AND WILL ENTER HARTLEY BY 410 AM. VERY HEAVY RAIN ALONG WITH FREQUENT LIGHTNING IS POSSIBLE. OTHER STRONG THUNDERSTORMS WERE LOCATED AT LE MARS AND 5 MILES EAST OF HINTON IN PLYMOUTH COUNTY. THESE STORMS WERE MOVING EAST AT 30 MILES AN HOUR AND WERE ALSO PRODUCING VERY HEAVY RAIN AND FREQUENT LIGHTNING. THE TOWNS OF REMSEN AND KINGSLEY SHOULD SEE THESE STORMS BY 430 AM. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR UNION COUNTY SOUTH DAKOTA UNTIL 7 AM. IRELAND
Special weather statement, Jun 7, 4:40 AM CDT, 10 minutes before
SDZ010-011-015-016-017-018-019-020-071040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 440 AM CDT MON JUN 7 1993 ...SEVERE THUNDERSTORM WATCH SOUTHERN SOUTH DAKOTA UNTIL 700 AM CDT... AT 430 AM CDT...SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN AND HAIL...CONTINUED OVER PARTS OF CENTRAL AND EASTERN SOUTH DAKOTA AND INTO SOUTHWEST MINNESOTA AND NORTHWEST IOWA. THESE STORMS WERE MOSTLY SOUTH OF A LINE FROM MOBRIDGE TO SISSETON WITH THE STRONGEST STORMS LOCATED JUST NORTH OF LOWER BRULE/35 MILES SOUTHEAST OF PIERRE...15 MILES NORTH OF WINNER AND 15 MILES NORTHEAST OF SIOUX FALLS. THESE STORMS CONTINUE TO PRODUCE VERY HEAVY RAIN...HAIL AND STRONG GUSTY WINDS. PERSONS IN CENTRAL AND SOUTHEAST SOUTH DAKOTA SHOULD REMAIN ON THE ALERT FOR THREATENING WEATHER AND SEEK SHELTER IF SIGHTED. MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR. PFEIFFER
Special weather statement, Jun 7, 4:43 AM CDT, 7 minutes before
SDZ010-011-015-016-017-018-019-020-071040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE HURON SD 440 AM CDT MON JUN 7 1993 ...SEVERE THUNDERSTORM WATCH SOUTHERN SOUTH DAKOTA UNTIL 700 AM CDT... AT 430 AM CDT...SCATTERED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN AND HAIL...CONTINUED OVER PARTS OF CENTRAL AND EASTERN SOUTH DAKOTA AND INTO SOUTHWEST MINNESOTA AND NORTHWEST IOWA. THESE STORMS WERE MOSTLY SOUTH OF A LINE FROM MOBRIDGE TO SISSETON WITH THE STRONGEST STORMS LOCATED JUST NORTH OF LOWER BRULE/35 MILES SOUTHEAST OF PIERRE...15 MILES NORTH OF WINNER AND 15 MILES NORTHEAST OF SIOUX FALLS. THESE STORMS CONTINUE TO PRODUCE VERY HEAVY RAIN...HAIL AND STRONG GUSTY WINDS. PERSONS IN CENTRAL AND SOUTHEAST SOUTH DAKOTA SHOULD REMAIN ON THE ALERT FOR THREATENING WEATHER AND SEEK SHELTER IF SIGHTED. MOVEMENT WAS NORTHEAST AT 30 MILES AN HOUR. PFEIFFER
The 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, 5:33 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 32 min |
| Jun 7, 6:34 PM CDT | Tornado Warning | FSD | O'Brien | 26 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
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.