Alert archive / South Dakota / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 33, NWS Sioux Falls, SD

June 7, 1994Union County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 7, 1994, 2:39 AM CDT for Union County, South Dakota. It was in force for 36 min.

The area

The counties it named.

The facts

Issued: Jun 7, 1994, 2:39 AM CDT (07:39 UTC)
Expired: Jun 7, 1994, 3:15 AM CDT
In force: 36 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Union County, SD

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 7.7 hours before the alert went out and 170 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1216 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1808 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS1 KSUX 070739 RRA
SVRSUX
SDC127-070815-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX CITY IA
239 AM CDT TUE JUN 7 1994
 
THE NATIONAL WEATHER SERVICE IN SIOUX CITY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  315 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST SOUTH DAKOTA
 
   ...UNION COUNTY
 
AT 235 AM CDT A SEVERE THUNDERSTORM WAS NEAR SPINK SOUTH DAKOTA...30
MILES NORTHWEST OF SIOUX CITY. MOVEMENT WAS EAST AT 30 MILES AN HOUR.
THE SEVERE THUNDERSTORM WILL AFFECT THE TOWNS OF BIG SPRING AND RICHLAND
SOUTH DAKOTA BETWEEN 250 AND 300 AM.
 
 
REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS IN EXCESS
OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING...AND HEAVY RAINS THAT CAN
QUICKLY FLOOD LOW LYING AREAS. IF YOU ARE IN THE PATH OF THIS STORM
TAKE SHELTER IN A REINFORCED BUILDING IMMEDIATELY.
 
 
HUMPHREY

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 7, 1:20 AM CDT, 1 hour 19 minutes before

SDZ058>060-063>065-068-070900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
120 AM CDT TUE JUN 7 1994

...SEVERE THUNDERSTORM WATCH FOR AURORA...DAVIDSON..HANSON...CHARLES
MIX...DOUGLAS...HUTCHINSON AND BON HOMME COUNTIES HAS BEEN
CANCELLED....

AT 115 AM CDT RADAR SHOWED A BAND OF THUNDERSTORMS STRETCHED FROM 20
MILES SOUTHEAST OF MITCHELL TO NEAR YANKTON. THESE THUNDERSTORMS WERE
MOVING NORTHEAST AT 25 MPH.

THESE THUNDERSTORMS WILL PRODUCE BRIEF PERIODS OF HEAVY RAIN AND
DANGEROUS CLOUD TO GROUND LIGHTNING...BUT ARE NOT EXPECTED TO PRODUCE
SEVERE WEATHER.

RESIDENTS IN THESE AREAS SHOULD BE PREPARED FOR THIS ADVERSE
WEATHER. MOVE TO A SAFE PLACE REINFORCED SHELTER IF NECESSARY.

REMEMBER...LIGHTNING MAY STRIKE SOME MILES AWAY FROM THE PARENT
CLOUD.  PRECAUTIONS SHOULD BE TAKEN EVEN THOUGH THE THUNDERSTORM IS
NOT DIRECTLY OVERHEAD.

BLOOM

Local storm report, Jun 7, 1:45 AM CDT, 54 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
145 AM CDT TUE JUN 7 1994

STORM DATA FOR MONDAY JUNE 6 1994

 TIME          COUNTY...LOCATION AND STATE   CHARACTER OF STORM...DAMAGE
.......................................................................

 945 PM CDT   GREGORY...4S GREGORY SD        GOLFBALL SIZED HAIL

 10 PM CDT    GREGORY...BURKE SD             GUST TO 80 MPH
                                             RADIO ANTENNA BLOWN OVER
                                             MANY TREES DOWN

 JCV

Local storm report, Jun 7, 1:47 AM CDT, 52 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
145 AM CDT TUE JUN 7 1994

STORM DATA FOR MONDAY JUNE 6 1994

 TIME          COUNTY...LOCATION AND STATE   CHARACTER OF STORM...DAMAGE
.......................................................................

 945 PM CDT   GREGORY...4S GREGORY SD        GOLFBALL SIZED HAIL

 10 PM CDT    GREGORY...BURKE SD             GUST TO 80 MPH
                                             RADIO ANTENNA BLOVWN OVER
                                             MANY TREES DOWN

 JCV

Special weather statement, Jun 7, 2:05 AM CDT, 34 minutes before

IAZ013-020-021-031-032-043-NEZ013>015-SDZ071-070815-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
205 AM CDT TUE JUN 7 1994

...STRONG THUNDERSTORMS WILL MOVE INTO THE AREA...

AT 200 AM CDT A NEWLY DEVELPED THUNDERSTORM WAS LOCATED FROM PONCA TO
JACKSON NEBRASKA.  THIS STORM WILL MOVE INTO ELK POINT...JEFFERSON
AND NORTH SIOUX CITY SOUTH DAKOTA AS WELL AS SIOUX CITY IOWA BY 3 AM.
ANOTHER LINE OF STRONG THUNDERSTORMS WILL MOVE INTO MASKELL AND
NEWCASTLE NEBRASKA.

WIND GUSTS NEAR 45 MILES AN HOUR...PEA SIZE HAIL AND VERY HAIL RAIN ARE
POSSIBLE WITH THESE THUNDERSTORMS.

HUMPHREY

Special weather statement, Jun 7, 2:06 AM CDT, 33 minutes before

IAZ013-020-021-031-032-043-NEZ013>015-SDZ071-070815-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX CITY IA
205 AM CDT TUE JUN 7 1994

...STRONG THUNDERSTORMS WILL MOVE INTO THE AREA...

AT 200 AM CDT A NEWLY DEVELPED THUNDERSTORM WAS LOCATED FROM PONCA TO
JACKSON NEBRASKA.  THIS STORM WILL MOVE INTO ELK POINT...JEFFERSON
AND NORTH SIOUX CITY SOUTH DAKOTA AS WELL AS SIOUX CITY IOWA BY 3 AM.
ANOTHER LINE OF STRONG THUNDERSTORMS WILL MOVE INTO MASKELL AND
NEWCASTLE NEBRASKA.

WIND GUSTS NEAR 45 MILES AN HOUR...PEA SIZE HAIL AND VERY HAIL RAIN ARE
POSSIBLE WITH THESE THUNDERSTORMS.

HUMPHREY

Special weather statement, Jun 7, 2:18 AM CDT, 21 minutes before

SDZ057-058-063-064-070800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
220 AM CDT TUE JUN 7 1994

...THUNDERSTORMS CONTINUE TO DEVELOP OVER SOUTH CENTRAL SOUTH
DAKOTA...

AT 215 AM CDT A THUNDERSTORM MOVED OVER SOUTHERN BRULE COUNTY IN
SOUTH CENTRAL SOUTH DAKOTA. THIS STORM PRODUCED GUSTY WINDS TO
45 MILES AN HOUR. THE STORM WAS MOVING TO THE EAST AT 25 MILES
AN HOUR...AND WILL MOVE ACROSS AURORA...DOUGLAS...AND NORTHERN
CHARLES MIX COUNTIES BY 230 AM CDT. PEOPLE IN THESE COUNTIES SHOULD
BE PREPARED FOR THESE GUSTY WINDS. TAKE SHELTER INSIDE A REINFORCED
BUILDING IF A STORM APPROACHES YOUR AREA.

MENTZER

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 6, 7:45 PM CDT	Severe Thunderstorm Warning	FSD	Minnehaha	30 min
Jun 6, 8:15 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Minnehaha	39 min
Jun 6, 9:01 PM CDT	Tornado Warning	FSD	Tripp	14 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1994 Every 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.