Alert archive / South Dakota / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 120, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 7, 1994, 6:45 PM CDT for Hutchinson County, McCook County, South Dakota. It was in force for 60 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 7, 1994, 6:45 PM CDT (23:45 UTC)
- Expired
- Aug 7, 1994, 7:45 PM CDT
- In force
- 60 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Hutchinson County, SD, McCook County, SD
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 7, 6:53 PM CDT | Tornado F0 | Dimock Sd, SD | A tornado damaged crops and some farm machinery. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 11.8 hours before the alert went out and 349 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1220 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 171 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 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, Aug 7, 5:46 PM CDT, 59 minutes before
IAZ013-020-021-031-032-043-NEZ013>015-SDZ071-031630- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX CITY IA 546 PM CDT WED AUG 3 1994 ...THUNDERSTORMS WILL MOVE INTO THE AREA BY MID EVENING... SCATTERED THUNDERSTORMS THAT WERE IN NORTH CENTRAL NEBRASKA AND SOUTH CENTRAL SOUTH DAKOTA WILL MOVE INTO THE AREA BY MIDDLE EVENING. THE AREAS THAT WILL SEE THE THUNDERSTORMS FIRST WILL BE NORTH AND WEST OF SIOUX CITY. THIS IS ALSO WHERE THE WATCH IS IN EFFECT. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL MIDNIGHT FOR DIXON COUNTY NEBRASKA...UNION COUNTY SOUTH DAKOTA...AND PLYMOUTH COUNTY IOWA. PEOPLE IN THE WATCH AREA SHOULD KEEP AN EYE ON THE SKY AND LISTEN FOR LATER WEATHER STATEMENTS AND POSSIBLE WARNINGS. MICHELS
Special weather statement, Aug 7, 6:45 PM CDT, 0 minutes before
SDZ049-050-057-058-072345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 645 PM CDT SUN AUG 7 1994 ...SEVERE THUNDERSTORM WATCH FOR TRIPP...GREGORY...BRULE...AND AURORA COUNTIES CANCELED... THE SEVERE THUNDERSTORM WATCH FOR TRIPP...GREGORY...BRULE...AND AURORA COUNTIES OF SOUTHCENTRAL SOUTH DAKOTA HAS BEEN CANCELED AS OF 645 PM CDT. SCATTERED THUNDERSHOWERS ARE STILL POSSIBLE IN THESE AREAS BUT NO SEVERE WEATHER IS EXPECTED. CONTINUE WATCH 704 FOR THE REMAINDER OF SOUTHEAST SOUTH DAKOTA. KOSCIELSKI
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 6:31 PM CDT | Severe Thunderstorm Warning | FSD | Cottonwood, Murray | 59 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 1994Every severe thunderstorm warning in 1994
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.