Alert archive / South Dakota / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 98, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 7, 1994, 12:42 AM CDT for Brookings County, Lake County, South Dakota. It was in force for 48 min.
The area
The counties it named.
The facts
- Issued
- Jul 7, 1994, 12:42 AM CDT (05:42 UTC)
- Expired
- Jul 7, 1994, 1:30 AM CDT
- In force
- 48 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Brookings County, SD, Lake County, SD
The nearest sounding before it
Aberdeen, SD (KHON), launched 00:00Z, 5.7 hours before the alert went out and 138 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
- 2491 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1107 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 6.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KFSD 070546 SVRFSD SDC011-079-070630- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 1242 AM CDT THU JUL 7 1994 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 130 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL SOUTH DAKOTA ...WESTERN BROOKINGS COUNTY...NORTHEASTERN LAKE COUNTY AT 1242 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM 20 MILES SOUTHWEST OF BROOKINGS IN NORTHEAST LAKE COUNTY OVER NUNDA. THE STORM WAS MOVING TO THE NORTH AT 30 MILES AN HOUR AND SHOULD REACH SINA BY 100 AM CDT. THE STORM MAY ALSO AFFECT PERSONS IN VOLGA AND BROOKINGS BY 115 AM CDT. IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD GET TO A REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCES WINDS IN EXCESS OF 60 MPH...HAIL 3/4 INCH OR LARGER...DEADLY LIGHTNING...AND HEAVY RAIN THAT CAN QUICKLY FLOOD A LOW LYING AREA. MED
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, Jul 6, 9:32 PM CDT, 3 hours 10 minutes before
SDZ001>005-009-010-012>017-024>033-035>037-041>051-070335- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 930 PM CDT (830 PM MDT) WED JUL 6 1994 ...TORNADO WATCH FOR WESTERN SOUTH DAKOTA EXPIRED... ...TORNADO WATCH FOR PORTION OF CENTRAL SOUTH DAKOTA CANCELLED... THE TORNADO WATCH THAT WAS IN EFFECT FOR WESTERN SOUTH DAKOTA EXPIRED AT 8 PM MDT. THERE CONTINUED TO BE SOME SHOWER AND THUNDERSTORMS OCCURING IN WESTERN SOUTH DAKOTA BUT WERE NO LONGER SEVERE. THIS THUNDERSTORMS AND SHOWERS SHOULD CONTINUE TO DECREASE AS THEY MOVE OUT OF WESTERN SOUTH DAKOTA. THE SEVERE THUNDERSTORMS THAT HAVE BEEN OVER CENTRAL SOUTH DAKOTA HAVE MOVED GENERALLY TO THE EAST OF THE MISSOURI RIVER NORTH OF PIERRE. THE TORNADO WATCH THAT WAS TO BE IN EFFECT UNTIL MIDNIGHT CDT IS NO LONGER IN EFFECT FOR PARTS OF CENTRAL SOUTH DAKOTA WEST OF THE MISSOURI RIVER AND NORTH OF PIERRE. SOUTH OF PIERRE THE WATCH IS NO LONGER IN EFFECT WEST OF A LINE FROM PIERRE TO THE NEBRASKA SOUTH DAKOTA BORDER NORTH OF VALENTINE. THUNDERSTORMS CONTINUE TO MOVE NORTHEAST OUT OF NORTH CENTRAL NEBRASKA INTO SOUTH CENTRAL SOUTH DAKOTA AND MAY BECOME SEVERE AS THE STORMS MOVE INTO SOUTH DAKOTA. PERSONS IN SOUTH CENTRAL SOUTH DAKOTA SHOULD REMAIN ALERT FOR THE POSSIBILITY OF SEVERE WEATHER AS THESE STORMS MOVE THROUGH THEIR AREA. DO NOT USE YOUR CAR TO OUTRUN A TORNADO. CARS ARE EASILY TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF A TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT. MED
Special weather statement, Jul 6, 10:00 PM CDT, 2 hours 42 minutes before
SDZ046-047-049-050-057-058-063-064-070400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 957 PM CDT WED JUL 6 1994 ...TORNADO WATCH REMAINS IN EFFECT FOR BRULE...GREGORY...AND TRIPP COUNTIES IN SOUTH CENTRAL SOUTH DAKOTA UNTIL MIDNIGHT CDT... ...SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR DOUGLAS... AURORA...AND CHARLES MIX COUNTIES IN SOUTH CENTRAL SOUTH DAKOTA UNTIL 2 AM CDT... STRONG THUNDERSTORMS WILL CONTINUE TO MOVE OUT OF NORTH CENTRAL NEBRASKA AND INTO SOUTH CENTRAL SOUTH DAKOTA OVER THE NEXT SEVERAL HOURS. AT 1000 PM CDT THE STRONGEST STORMS WERE LOCATED IN SOUTHERN BRULE COUNTY NEAR BIJOU HILLS AND IN NORTHWEST CHARLES MIX COUNTY NEAR ACADEMY OR ABOUT 25 MILES TO THE SOUTHEAST OF CHAMBERLAIN. STRONG STORMS WERE ALSO LOCATED IN SOUTHERN GREGORY COUNTY NEAR THE NEBRASKA BORDER. THESE STORMS WERE MOVING TO THE EAST AT 20 MILES AN HOUR. THESE STORMS WILL BE MOVING INTO AURORA...DOUGLAS AND DAVISON COUNTIES BY 1030 PM CDT. THESE STORMS WILL LIKELY CONTAIN HEAVY RAINS...SMALL HAIL...AND GUSTY WINDS. IF YOU ARE OUTDOORS...MOVE TO A PLACE OF SHELTER IMMEDIATELY IF A STORM APPROACHES. MOTORISTS SHOULD REMAIN ALERT FOR REDUCED VISIBILITIES DURING DOWNPOURS OF RAIN. STREETS MAY FLOOD QUICKLY. GRAHAM
Special weather statement, Jul 6, 10:06 PM CDT, 2 hours 36 minutes before
SDZ038-052>053-070500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 1005 PM CDT WED JUL 6 1994 STRONG THUNDERSTORMS ARE EXPECTED TO MOVE INTO HURON AND WESSINGTON SPRINGS BY 1030 PM CDT. THESE STORMS HAVE PRODUCED 40 TO 50 MILE AN HOUR WIND GUSTS DURING THE LAST HOUR. PEOPLE IN BEADLE, SANDBORN AND JERAULD COUNTIES CAN EXPECT STRONG GUSTY WINDS AND VERY HEAVY RAIN WITH THESE STORMS. SEEK SHELTER AS THESE STORMS APPROACH. ...SOLOMON/VOGELSANG
Local storm report, Jul 6, 10:39 PM CDT, 2 hours 3 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
1035 PM CDT WED JUL 6 1994
STORM DATA FOR JUL 6 1994
TIME COUNTY...LOCATION CHARACTER OF STORM...DAMAGE
630 PM CDT STANLEY CO...HAYES 6 W 60 TO 70 MPH WIND
644 PM CDT STANLEY CO...HAYES 16 NW 60 TO 70 MPH WIND
649 PM CDT STANLEY CO...HAYES 5 NW 60 TO 70 MPH WIND
730 PM CDT HUGHES CO...PIERRE 60 TO 70 MPH WIND
808 PM CDT SULLY CO...ONIDA 80 MPH WIND
819 PM CDT HUGHES CO...HARROLD 6 S 60 TO 70 MPH WIND
UNKNOWN HUGHES AND STANLEY CO WIDESPREAD HEAVY WIND
DAMAGE TO BUILDINGS AND
x TREES.
SPRINGERSpecial weather statement, Jul 6, 10:50 PM CDT, 1 hour 52 minutes before
SDZ003>005-009-010-014>017-032-033-035>037-045>051-070450- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1048 PM CDT (948 PM MDT) WED JUL 6 1994 ...TORNADO WATCH FOR CENTRAL SOUTH DAKOTA CANCELLED... THE TORNADO WATCH THAT WAS STILL IN EFFECT FOR A PORTION OF CENTRAL SOUTH DAKOTA UNTIL MIDNIGHT CDT HAS BEEN CANCELED. THE THUNDERSTORMS HAVE MOVED OUT OF CENTRAL SOUTH DAKOTA AND INTO THE EASTERN THIRD OF THE STATE. THE THUNDERSTORMS WERE GENERALLY EAST OF A LINE FROM ABERDEEN TO PICKSTOWN OR ABOUT 6 MILES SOUTH OF LAKE ANDES. THE THUNDERSTORMS CONTINUE TO MOVE TO THE EAST AROUND 35 MILES AN HOUR. WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A STRON"G BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. MED
Special weather statement, Jul 6, 11:58 PM CDT, 44 minutes before
SDZ019-020-022-039-054-070800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HURON SD 1159 PM CDT WED JUL 6 1994 ...SEVERE THUNDERSTORM WATCH CONTINUES FOR EASTERN SOUTH DAKOTA UNTIL 200 AM CDT... ...AT 1145 PM CDT...STRONG THUNDERSTORMS CONTINUED TO MOVE THROUGH EASTERN SOUTH DAKOTA. THE STRONGEST STORMS ARE ALONG A LINE 25 MILES WIDE FROM 15 MILES SOUTH OF ABERDEEN...THROUGH HURON...TO JUST SOUTH OF MITCHELL. THESE STORMS ARE MOVING TO THE EAST AT 35 MILES AN HOUR. PEOPLE IN CLARK, KINGSBURY AND MINER COUNTIES SHOULD BE READY FOR THE STORMS TO PASS THROUGH AROUND MIDNIGHT. PEOPLE IN CODINGTON AND HAMLIN COUNTIES SHOULD EXPECT THE STORMS TO ARRIVE AROUND 100 AM CDT. IN THE PAST HOUR, THESE STORMS HAVE PRODUCED WINDS 40 TO 50 MILES AN HOUR, PEA SIZE HAIL, AND VERY HEAVY RAIN. PLEASE TAKE SHELTER AS THESE STORMS APPROACH YOUR AREAS. ....VOGELSANG...
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.