Alert archive / South Dakota / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 21, NWS Rapid City, SD
NWS Rapid City, SD issued this severe thunderstorm warning at Jun 4, 1994, 2:33 PM MDT for Custer County, Pennington County, South Dakota. It was in force for 42 min.
The area
The counties it named.
The facts
- Issued
- Jun 4, 1994, 2:33 PM MDT (20:33 UTC)
- Expired
- Jun 4, 1994, 3:15 PM MDT
- In force
- 42 min
- Issued by
- NWS Rapid City, SD
- Area
- Whole counties
Counties Custer County, SD, Pennington County, SD
The nearest sounding before it
Rapid City, SD (KRAP), launched 12:00Z, 8.6 hours before the alert went out and 33 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
- 748 J/kg
- Mixed-layer CIN
- -327 J/kg
- Mixed-layer LCL
- 1543 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KRAP 042033 SVRUNR SDC033-103-042115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE RAPID CITY SD 233 PM MDT SAT JUN 4 1994 THE NATIONAL WEATHER SERVICE IN RAPID CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 315 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIESS... IN SOUTHWEST SOUTH DAKOTA ...NORTH CENTRAL CUSTER COUNTY IN WEST CENTRAL SOUTH DAKOTA ...SOUTH CENTRAL PENNINGTON COUNTY AT 230 PM MDT...RADAR WAS INDICATING A SEVERE THUNDERSTORM 5 MILES NORTH OF CUSTER NEAR CRAZY HORSE MEMORIAL. THIS STORM WAS MOVING NORTHEAST AT 15 MPH AND WILL LIKELY PRODUCE LARGE HAIL AS IT MOVES THROUGH THE CRAZY HORSE...HARNEY PEAK...AND MT. RUSHMORE AREAS. THIS STORM WILL ALSO AFFECT CUSTER...HILL CITY...AND KEYSTONE THROUGH 315 PM. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. AVOID TALL OBJECTS SUCH AS TREES. DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...VERY HEAVY RAIN AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. BUNKERS
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 4, 8:40 AM MDT, 5 hours 53 minutes before
SDZ001>002-012>014-024>032-041>044-041800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 840 AM MDT SAT JUN 04 1994 ...SEVERE WEATHER POSSIBLE THIS AFTERNOON ACROSS WESTERN SOUTH DAKOTA... SOUTHEAST WINDS INCREASING TO 10 TO 20 MILES AN HOUR WILL CONTINUE TO BRING HUMID AND UNSTABLE AIR INTO WESTERN SOUTH DAKOTA. AN AREA OF LOW PRESSURE CURRENTLY LOCATED IN EASTERN WYOMING WILL MOVE INTO THIS EXTREMELY UNSTABLE AIR THIS AFTERNOON. THE COMBINATION OF THE TWO WILL BRING A CHANCE OF SEVERE WEATHER TO WESTERN SOUTH DAKOTA THIS AFTERNOON. THE THUNDERSTORMS ARE EXPECTED TO BEGIN DEVELOPING AFTER 1 PM AND WILL CONTINUE INTO THE EVENING HOURS. CURRENTLY LARGE HAIL AND HEAVY RAIN APPEAR TO BE THE MAIN THREAT. 1 TO 1 1/2 INCH DIAMETER HAIL IS POSSIBLE. STRONG WINDS AND DEADLY LIGHTNING ARE ALWAYS A THREAT. IT IS ALSO POSSIBLE THAT SOME OF THE STORMS COULD PRODUCE AN INCH OR MORE OF RAIN. < PERSONS PLANNING ANY OUTDOOR ACTIVITY THIS AFTERNOON ACROSS WESTERN SOUTH DAKOTA ARE URGED TO STAY ABREAST OF THIS WEATHER SITUATION. CONTINUE TO MONITOR YOUR LOCAL TV...RADIO OR THE NOAA WEATHER RADIO FOR FURTHER STATEMENTS AND UPDATES. HINTZ
Special weather statement, Jun 4, 8:42 AM MDT, 5 hours 51 minutes before
SDZ001>002-012>014-024>032-041>044-041800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 840 AM MDT SAT JUN 04 1994 ...SEVERE WEATHER POSSIBLE THIS AFTERNOON ACROSS WESTERN SOUTH DAKOTA... SOUTHEAST WINDS INCREASING TO 10 TO 20 MILES AN HOUR WILL CONTINUE TO BRING HUMID AND UNSTABLE AIR INTO WESTERN SOUTH DAKOTA. AN AREA OF LOW PRESSURE CURRENTLY LOCATED IN EASTERN WYOMING WILL MOVE INTO THIS EXTREMELY UNSTABLE AIR THIS AFTERNOON. THE COMBINATION OF THE TWO WILL BRING A CHANCE OF SEVERE WEATHER TO WESTERN SOUTH DAKOTA THIS AFTERNOON. THE THUNDERSTORMS ARE EXPECTED TO BEGIN DEVELOPING AFTER 1 PM AND WILL CONTINUE INTO THE EVENING HOURS. CURRENTLY LARGE HAIL AND HEAVY RAIN APPEAR TO BE THE MAIN THREAT. 1 TO 1 1/2 INCH DIAMETER HAIL IS POSSIBLE. STRONG WINDS AND DEADLY LIGHTNING ARE ALWAYS A THREAT. IT IS ALSO POSSIBLE THAT SOME OF THE STORMS COULD PRODUCE AN INCH OR MORE OF RAIN. < PERSONS PLANNING ANY OUT"DOOR ACTIVITY THIS AFTERNOON ACROSS WESTERN SOUTH DAKOTA ARE URGED TO STAY ABREAST OF THIS WEATHER SITUATION. CONTINUE TO MONITOR YOUR LOCAL TV...RADIO OR THE NOAA WEATHER RADIO FOR FURTHER STATEMENTS AND UPDATES. HINTZ
The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 3:24 PM MDT | Severe Thunderstorm Warning | UNR | Custer | 66 min |
| Jun 4, 5:10 PM MDT | Severe Thunderstorm Warning | UNR | Custer | 50 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; the sounding from the Mesonet's radiosonde archive.