Alert archive / Iowa / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 5, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 7, 1993, 4:21 AM CDT for Plymouth County, Iowa. It was in force for 19 min.
The area
The counties it named.
The facts
- Issued
- Jun 7, 1993, 4:21 AM CDT (09:21 UTC)
- Expired
- Jun 7, 1993, 4:40 AM CDT
- In force
- 19 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Plymouth County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 9.4 hours before the alert went out and 158 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
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 7, 3:32 AM CDT, 49 minutes before
IAZ013-020-SDZ066-070930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 327 AM CDT MON JUN 7 1993 ...THUNDERSTORMS WERE MOVING TOWARD SHELDON... AT 325 AM CDT STRONG THUNDERSTORMS WERE MOVING TOWARD SHELDON IOWA WHICH IS 55 MILES NORTHEAST OF SIOUX CITY. THE STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR AND SHOULD BE IN SHELDON BY 4 AM. HEAVY RAIN AND FREQUENT LIGHTNING WILL OCCUR WITH THESE STORMS. OTHER THUNDERSTORMS WERE LOCATED NEAR JEFFERSON AND 5 MILES SOUTHEAST OF BERESFORD IN UNION COUNTY. THESE STORMS SHOULD MOVE INTO ALCESTER BY 4 AM AND HINTON IOWA BY 430 AM. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR UNION COUNTY UNTIL 7 AM THIS MORNING. IRELAND
Special weather statement, Jun 7, 3:38 AM CDT, 43 minutes before
SDZ012-015>020-071000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 340 AM CDT MON JUN 7 1993 ...STRONG THUNDERSTORMS CONTINUE TO DEVELOP... CLUSTERS OF THUNDERSTORMS CONTINUE TO DEVELOP IN THE TRI/STATE AREA AROUND SIOUX FALLS AT 335 AM. THESE THUNDERSTORMS COULD PRODUCE LOCALLY VERY HEAVY RAIN...BRIEF HAIL...AND GUSTY WINDS AS THEY MOVE NORTHEAST ABOUT 30 MPH. EARLIER AROUND 230 AM CDT TWO INCH DIAMETER HAIL WAS REPORTED 9 MILES NORTHWEST OF BERESFORD ALONG WITH 3 1/2 INCHES OF RAIN. ALSO AROUND 2 INCHES OF RAIN OCCURRED IN THE CANTON AREA. THESE LOCALLY HEAVY RAINS COULD CAUSE LOCAL FLOODING PROBLEMS. THERE IS THE POSSIBILITY OF MORE STORM DEVELOPMENT THE REMAINDER OF TONIGHT ACROSS SOUTHCENTRAL AND SOUTHEAST SOUTH DAKOTA. A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTHEAST SOUTH DAKOTA THROUGH TODAY. IF A THUNDERSTORM APPROACHES YOUR AREA...SEEK SHELTER INSIDE A REINFORCED BUILDING IMMEDIATELY. RYRHOLM P
Special weather statement, Jun 7, 3:40 AM CDT, 41 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 `D8WUUS `WWUSh XR"WEPA6WWUSH 3U^WSUSl T }66WWUS p%6WWUS `D8WUUS XWOUS6WWUSB 4 h>TWEPA ^gtztzVQ6WWUS: HQ}WWUSf Q6WWUSOF6WWUS\ X 4Z\q6WWUSR NING. HIGH 7 TO R"WEPA tc<6WWUS$ jIWUUSp p KM/H. TUESDKoWEPA\ |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, 37 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, 20 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, 16 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
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 1:06 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Yankton | 54 min |
| Jun 7, 2:02 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Turner | 43 min |
| Jun 7, 4:43 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha, Moody | 47 min |
| Jun 7, 5:33 PM CDT | Severe Thunderstorm Warning | FSD | Rock | 42 min |
| Jun 7, 5:54 PM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 41 min |
| Jun 7, 5:59 PM CDT | Tornado Warning | FSD | Rock | 36 min |
| Jun 7, 6:40 PM CDT | Tornado Warning | FSD | Nobles | 35 min |
| Jun 7, 3:52 AM CDT | Severe Thunderstorm Warning | FSD | Osceola | 38 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, 6:34 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.