Alert archive / South Dakota / Tornado Warnings in 1993
Tornado Warning 6, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at May 7, 1993, 6:33 PM CDT for Lake County, McCook County, South Dakota. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- May 7, 1993, 6:33 PM CDT (23:33 UTC)
- Expired
- May 7, 1993, 7:15 PM CDT
- In force
- 42 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Lake County, SD, McCook County, SD
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.6 hours before the alert went out and 290 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
- 115 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 913 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 130 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 072333 TORFSD SDC079-087-080015- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 633 PM CDT FRI MAY 7 1993 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 715 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL SOUTH DAKOTA ...SOUTHERN LAKE COUNTY IN SOUTHEAST SOUTH DAKOTA ...EASTERN MCCOOK COUNTY AT 626 PM CDT A TORNADO WAS REPORTED AT CANISOTA SD MOVING TO THE NORTHEAST AT 25 MILES AN HOUR. THE CITY OF MONTROSE CAN EXPECT THE TORNADO BY 635 PM CDT AND THE CITY OF JUNIUS CAN EXPECT THE TORNADO BY 650 PM CDT IF IT REMAINS ON THE GROUND. THE TORNADO TOOK POWER LINES DOWN IN CANISOTA AND DAMAGED THE TOP OF THE GRAIN ELEVATOR. A TORNADO WATCH IS IN EFFECT FOR PARTS OF SOUTHEAST SOUTH DAKOTA... NORTHWEST IOWA AND SOUTHWEST MINNESOTA. IF YOU LIVE IN A HOME OR APARTMENT...SEEK SHELTER IN THE INNERMOST PORTION OF THE BUILDING ON THE LOWEST FLOOR. IF YOU LIVE IN A MOBILE HOME...ABANDON IT FOR A STRONGER SHELTER. &
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, May 7, 5:08 PM CDT, 1 hour 25 minutes before
IAZ020-031-043-NEZ094-095-096-SDZ066-072300- SPECIAL WEATHER STATEMENT...CORRECTED TYPO NATIONAL WEATHER SERVICE SIOUX CITY IA 508 PM CDT FRI MAY 7 1993 ...THE THUNDERSTORMS HAVE MOVED OUT OF THE AREA... AT 500 PM CDT THE STRONG THUNDERSTORM THAT HAD BEEN NEAR BERESFORD SOUTH DAKOTA IN UNION COUNTY HAD MOVED NORTH OUT OF THE AREA. ACROSS THE REST OF THE AREA THERE WERE ONLY A FEW SCATTERED LIGHT SHOWERS. CONDITIONS ACROSS THE AREA LATE THIS AFTERNOON ARE SET FOR RAPID DEVELOPMENT OF THUNDERSTORMS. THESE STORMS WILL HAVE THE POTENTIAL TO PRODUCE HEAVY RAIN...DAMAGING WINDS AND LARGE HAIL. TORNADOES COULD ALSO FORM WITH LITTLE OR NO ADVANCED NOTICE. THEREFORE A TORNADO WATCH IS IN EFFECT UNTIL 1000 PM FOR UNION COUNTY SOUTH DAKOTA...DIXON... DAKOTA AND THURSTON COUNTIES IN IOWA AND PLYMOUTH...WOODBURY AND MONONA COUNTIES IN IOWA. IRELAND
Special weather statement, May 7, 5:08 PM CDT, 1 hour 25 minutes before
IAZ020-031-043-NEZ094-095-096-SDZ066-072300- SPECIAL WEATHER STATEMENT...CORRECTED TYPO NATIONAL WEATHER SERVICE SIOUX CITY IA 508 PM CDT FRI MAY 7 1993 ...THE THUNDERSTORMS HAVE MOVED OUT OF THE AREA... AT 500 PM CDT THE STRONG THUNDERSTORM THAT HAD BEEN NEAR BERESFORD SOUTH DAKOTA IN UNION COUNTY HAD MOVED NORTH OUT OF THE AREA. ACROSS THE REST OF THE AREA THERE WERE ONLY A FEW SCATTERED LIGHT SHOWERS. CONDITIONS ACROSS THE AREA LATE THIS AFTERNOON ARE SET FOR RAPID DEVELOPMENT OF THUNDERSTORMS. THESE STORMS WILL HAVE THE POTENTIAL TO PRODUCE HEAVY RAIN...DAMAGING WINDS AND LARGE HAIL. TORNADOES COULD ALSO FORM WITH LITTLE OR NO ADVANCED NOTICE. THEREFORE A TORNADO WATCH IS IN EFFECT UNTIL 1000 PM FOR UNION COUNTY SOUTH DAKOTA...DIXON... DAKOTA AND THURSTON COUNTIES IN IOWA AND PLYMOUTH...WOODBURY AND MONONA COUNTIES IN IOWA. IRELAND
Special weather statement, May 7, 5:30 PM CDT, 1 hour 3 minutes before
SDZ004-005-010-011-012-016-080015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 530 PM CDT FRI MAY 7 1993 CENTRAL AND EAST CENTRAL SOUTH DAKOTA ...A TORNADO WATCH IS IN EFFECT UNTIL 10 PM CDT... THUNDERSTORMS...SOME OF WHICH MAY BE SEVERE...ARE EXPECTED TONIGHT AS A LINE MOVES THROUGH THE AREA. VERY HEAVY RAIN AND STRONG GUSTY WIND ARE LIKELY WITH HAIL...DAMAGING WIND...AND TORNADOES POSSIBLE. PERSONS IN OR NEAR THE WATCH AREA NEED TO WATCH FOR SUDDEN CHANGES IN THE WEATHER AND STAY TUNED TO RADIO OR TELEVISION FOR STATEMENTS AND WARNINGS. SPRINGER
Special weather statement, May 7, 5:35 PM CDT, 58 minutes before
SDZ004-005-010-011-012-016-080015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 530 PM CDT FRI MAY 7 1993 CENTRAL AND EAST CENTRAL SOUTH DAKOTA ...A TORNADO WATCH IS IN EFFECT UNTIL 10 PM CDT... THUNDERSTORMS...SOME OF WHICH MAY BE SEVERE...ARE EXPECTED TONIGHT AS A LINE MOVES THROUGH THE AREA. VERY HEAVY RAIN AND STRONG GUSTY WIND ARE LIKELY WITH HAIL...DAMAGING WIND...AND TORNADOES POSSIBLE. PERSONS IN OR NEAR THE WATCH AREA NEED TO WATCH FOR SUDDEN CHANGES IN THE WEATHER AND STAY TUNED TO RADIO OR TELEVISION FOR STATEMENTS AND WARNINGS. SPRINGER
Special weather statement, May 7, 6:02 PM CDT, 31 minutes before
IAZ020-021-031-032-043-NEZ094-095-096-SDZ066-080000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 602 PM CDT FRI MAY 7 1993 ...SCATTERED THUNDERSTORMS HAVE DEVELOPED IN THE AREA... AT 600 PM A THUNDERSTORM WAS LOCATED 5 MILES NORTH OF KINGSLEY IN PLYMOUTH...OR 25 MILES NORTHEAST OF SIOUX CITY. ANOTHER STORM WAS BETWEEN SOLDIER AND MOORHEAD IN MONONA COUNTY. BOTH STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR AND WERE NOT PRODUCING ANY SEVERE WEATHER. A LINE OF SEVERE STORMS STRETCHED ACROSS CENTRAL NEBRASKA. THIS LINE OF STORMS WILL BEGIN TO APPROACH THE WEST SECTIONS OF THE AREA AROUND 800 PM. A TORNADO WATCH CONTINUES UNTIL 1000 PM FOR DIXON...DAKOTA AND THURSTON COUNTIES IN NEBRASKA...PLYMOUTH...WOODBURY AND MONONA IN IOWA AND UNION IN SOUTH DAKOTA. IRELAND
Special weather statement, May 7, 6:04 PM CDT, 29 minutes before
IAZ020-021-031-032-043-NEZ094-095-096-SDZ066-080000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 602 PM CDT FRI MAY 7 1993 ...SCATTERED THUNDERSTORMS HAVE DEVELOPED IN THE AREA... AT 600 PM A THUNDERSTORM WAS LOCATED 5 MILES NORTH OF KINGSLEY IN PLYMOUTH...OR 25 MILES NORTHEAST OF SIOUX CITY. ANOTHER STORM WAS BETWEEN SOLDIER AND MOORHEAD IN MONONA COUNTY. BOTH STORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR AND WERE NOT PRODUCING ANY SEVERE WEATHER. A LINE OF SEVERE STORMS STRETCHED ACROSS CENTRAL NEBRASKA. THIS LINE OF STORMS WILL BEGIN TO APPROACH THE WEST SECTIONS OF THE AREA AROUND 800 PM. A TORNADO WATCH CONTINUES UNTIL 1000 PM FOR DIXON...DAKOTA AND BTHURSTON COUNTIES IN NEBRASKA...PLYMOUTH...WOODBURY AND MONONA IN IOWA AND UNION IN SOUTH DAKOTA. IRELAND
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 3:01 PM CDT | Tornado Warning | FSD | Lincoln | 29 min |
| May 7, 5:00 PM CDT | Tornado Warning | FSD | Davison, Hanson, Hutchinson | 60 min |
Nearby
Tornado Warnings in South Dakota, 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.