Alert archive / South Dakota / Tornado Warnings in 1994
Tornado Warning 9, NWS Rapid City, SD
NWS Rapid City, SD issued this tornado warning at Jul 12, 1994, 1:56 PM MDT for Pennington County, South Dakota. It was in force for 34 min.
The area
The counties it named.
The facts
- Issued
- Jul 12, 1994, 1:56 PM MDT (19:56 UTC)
- Expired
- Jul 12, 1994, 2:30 PM MDT
- In force
- 34 min
- Issued by
- NWS Rapid City, SD
- Area
- Whole counties
County Pennington County, SD
The nearest sounding before it
Rapid City, SD (KRAP), launched 12:00Z, 7.9 hours before the alert went out and 9 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
- 665 J/kg
- Mixed-layer CIN
- -253 J/kg
- Mixed-layer LCL
- 1133 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.2
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 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, Jul 12, 11:46 AM MDT, 2 hours 10 minutes before
SDZ024-121845- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 1146 AM MDT TUE JUL 12 1994 ...SEVERE THUNDERSTORM WARNING FOR SOUTHERN LAWARENCE COUNTY HAS EXPIRED... AT 1045 AM MDT WEATHER SERVICE RADAR INDICATED THAT THE SEVERE STORMS THAT PROMPTED THE WARNING FOR SOUTHERN LAWRENCE COUNTY HAVE FALLEN BELOW SEVERE LIMITS AND ARE NO LONGER CONSIDERED SEVERE. THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HINTZ
Special weather statement, Jul 12, 1:19 PM MDT, 37 minutes before
SDZ026-028>030-042-122120- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 119 PM MDT TUE JUL 12 1994 ...HEAVY THUNDERSTORMS OVER THE BLACK HILLS AND SOUTHWEST SOUTH DAKOTA... WEATHER SERVICE RADAR AT 105 PM MDT SHOWED TWO VERY HEAVY THUNDERSTORMS. THE FIRST WAS OVER CENTRAL SHANNON COUNTY NEAR OGLALA...OR 60 MILES SOUTHEAST OF RAPID CITY. THE OTHER WAS IN WESTERN CUSTER COUNTY 10 MILES WEST OF CUSTER...OR 30 MILES SOUTHEAST OF RAPID CITY. THESE STORMS ARE LIKELY PRODUCING VERY HEAVY RAIN AND SMALL HAIL AS WELL AS DEADLY CLOUD TO GROUND LIGHTNING. LITTLE MOVEMENT COULD BE DETERMINED. NO REPORTS OF SEVERE WEATHER HAVE BEEN RECIEVED BY THE WEATHER SERVICE. HOWEVER...PERSONS ARE URGED TO KEEP AN EYE TO THE SKY THIS AFTERNOON AND IF THREATENING WEATHER APPROACHES...SEEK SHELTER IN A STURDY BUILDING AND SAY AWAY FROM WINDOWS. STAY TUNED FOR FURTHER WEATHER UPDATES. SEARLES
Special weather statement, Jul 12, 1:20 PM MDT, 36 minutes before
SDZ026-028>030-042-122120- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE RAPID CITY SD 119 PM MDT TUE JUL 12 1994 ...HEAVY THUNDERSTORMS OVER THE BLACK HILLS AND SOUTHWEST SOUTH DAKOTA... WEATH
The office that day
Everything else NWS Rapid City, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 10:46 AM MDT | Severe Thunderstorm Warning | UNR | Lawrence | 59 min |
| Jul 12, 1:45 PM MDT | Severe Thunderstorm Warning | UNR | Custer, Pennington | 30 min |
| Jul 12, 1:53 PM MDT | Severe Thunderstorm Warning | UNR | Custer | 52 min |
| Jul 12, 2:18 PM MDT | Tornado Warning | UNR | Haakon | 42 min |
| Jul 12, 2:23 PM MDT | Tornado Warning | UNR | Jackson | 37 min |
| Jul 12, 2:45 PM MDT | Tornado Warning | UNR | Bennett | 15 min |
| Jul 12, 3:06 PM MDT | Tornado Warning | UNR | Haakon | 24 min |
| Jul 12, 3:08 PM MDT | Severe Thunderstorm Warning | UNR | Custer | 37 min |
| Jul 12, 3:14 PM MDT | Severe Thunderstorm Warning | UNR | 38 min | |
| Jul 12, 3:35 PM MDT | Severe Thunderstorm Warning | UNR | Bennett | 40 min |
| Jul 11, 7:11 PM MDT | Severe Thunderstorm Warning | UNR | Niobrara | 64 min |
Nearby
Tornado Warnings in South Dakota, 1994Every tornado warning in 1994Tornadoes 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.