Alert archive / South Dakota / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 136, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 25, 1990, 7:30 PM CDT for Gregory County, Tripp County, South Dakota. It was in force for 60 min. 2 reports 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 25, 1990, 7:30 PM CDT (00:30 UTC)
- Expired
- Aug 25, 1990, 8:30 PM CDT
- In force
- 60 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Gregory County, SD, Tripp County, SD
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 25, 7:40 PM CDT | Thunderstorm Wind 0 | Gregory, SD | |
| Aug 25, 8:13 PM CDT | Hail 1.75 | Gregory, SD |
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
Aberdeen, SD (KHON), launched 00:00Z, 0.5 hours before the alert went out and 203 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
- 4027 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 1709 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 7.9
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 25, 6:27 PM CDT, 1 hour 3 minutes before
SDZ015-260015- WEATHER UPDATE FOR SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA NATIONAL WEATHER SERVICE SIOUX FALLS SD 625 PM CDT SAT AUG 25 1990 ...STRONG THUNDERSTORMS OVER SOUTHWEST TRIPP COUNTY... AT 620 PM CDT AN ISOLATED THUNDERSTORM WITH VERY HEAVY RAIN AND STRONG GUSTY WINDS WAS 20 MILES SOUTHWEST OF WINNER. THE THUNDERSTORM WAS MOVING NORTHEAST AT 10 MILES AN HOUR AND WAS INCREASING IN INTENSITY. AS WITH ANY THUNDERSTORM...HAIL AND FREQUENT LIGHTNING STRIKES CAN ALSO BE EXPECTED. THIS THUNDERSTORM WILL MOVE SOUTH OF WINNER BUT WILL EFFECT MOST OF SOUTHERN TRIPP COUNTY BY 730 PM CDT. IF YOU ARE IN THE PATH OF THIS OR ANY THUNDERSTORM...REMAIN ALERT TO THE QUICKLY CHANGING WEATHER CONDITIONS AND BE READY TO TAKE COVER IF NEEDED. EDDY
Special weather statement, Aug 25, 7:12 PM CDT, 18 minutes before
SDZ015>020-260215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 724 PM CDT THU AUG 23 1990 AT 7 PM SCATTERED THUNDERSTORM SOME SEVERE AND WITH HEAVY RAIN...HAIL AND STRONG GUSTY WINDS WERE INVADING SOUTH CENTRAL SOUTH DAKOTA. THE THUNDERSTORMS WERE MOSTLY ALONG A LINE FROM 20 MILES SOUTH OF WINNER TO 20 MILES WEST OF CHAMBERLAIN. THE STORMS WERE MOVING NORTHEAST AT 20 MPH. OTHERWISE...CLOUDS...MOSTLY HIGH LEVEL...FROM THE THUNDERSTORMS IN THE SOUTH CENTRAL...WERE MOVING INTO THE SOUTHEAST. OTHERWISE...HOT AND HUMID WEATHER CONTINUED WITH TEMPERATURES RANGING FROM THE MID 80S TO THE UPPER 90S. WINDS WERE SOUTHEAST AT 10 TO 25 MPH. TONIGHT...SCATTERED THUNDERSTORMS...SOME SEVERE WILL CONTINUE TO DEVELOP OVER THE SOUTH CENTRAL AND WILL MOVE INTO THE SOUTHEAST AROUND OR AFTER MIDNIGHT. LOWS TONIGHT WILL COOL TO THE 60S AND WINDS WILL BECOME LIGHT AND VARIABLE. WEATHER CONDITIONS IN AND AROUND THUNDERSTORMS WILL V_ARY DRAMATICALLY. EDDY
Special weather statement, Aug 25, 7:14 PM CDT, 16 minutes before
SDZ015>020-260215- SPECIAL WEATHER STATEMENT ...CORRECETED... NATIONAL WEATHER SERVICE SIOUX FALLS SD 724 PM CDT THU AUG 23 1990 ...A SEVERE THUNDERSTORM WATCH FOR PARTS OF SOUTH CENTRAL SOUTH DAKOTA UNTIL 1 AM CDT... AT 7 PM SCATTERED THUNDERSTORM SOME SEVERE AND WITH HEAVY RAIN...HAIL AND STRONG GUSTY WINDS WERE INVADING SOUTH CENTRAL SOUTH DAKOTA. THE THUNDERSTORMS WERE MOSTLY ALONG A LINE FROM 20 MILES SOUTH OF WINNER TO 20 MILES WEST OF CHAMBERLAIN. THE STORMS WERE MOVING NORTHEAST AT 20 MPH. OTHERWISE...CLOUDS...MOSTLY HIGH LEVEL...FROM THE THUNDERSTORMS IN THE SOUTH CENTRAL...WERE MOVING INTO THE SOUTHEAST. OTHERWISE...HOT AND HUMID WEATHER CONTINUED WITH TEMPERATURES RANGING FROM THE MID 80S TO THE UPPER 90S. WINDS WERE SOUTHEAST AT 10 TO 25 MPH. TONIGHT...SCATTERED THUNDERSTORMS...SOME SEVERE WILL CONTINUE TO DEVELOP OVER THE SOUTH CENTRAL AND WILL MOVE INTO THE SOUTHEAST AROUND OR AFTER MIDNIGHT. LOWS TONIGHT WILbL COOL TO THE 60S AND WINDS WILL BECOME LIGHT AND VARIABLE. WEATHER CONDITIONS IN AND AROUND THUNDERSTORMS WILL VARY DRAMATICALLY. EDDY
Special weather statement, Aug 25, 7:17 PM CDT, 13 minutes before
SDZ015>020-260215- SPECIAL WEATHER STATEMENT ...CORRECETED... NATIONAL WEATHER SERVICE SIOUX FALLS SD 717 PM CDT SAT AUG 25 1990 ...A SEVERE THUNDERSTORM WATCH FOR PARTS OF SOUTH CENTRAL SOUTH DAKOTA UNTIL 1 AM CDT... AT 7 PM SCATTERED THUNDERSTORM SOME SEVERE AND WITH HEAVY RAIN...HAIL AND STRONG GUSTY WINDS WERE INVADING SOUTH CENTRAL SOUTH DAKOTA. THE THUNDERSTORMS WERE MOSTLY ALONG A LINE FROM 20 MILES SOUTH OF WINNER TO 20 MILES WEST OF CHAMBERLAIN. THE STORMS WERE MOVING NORTHEAST AT 20 MPH. OTHERWISE...CLOUDS...MOSTLY HIGH LEVEL...FROM THE THUNDERSTORMS IN THE SOUTH CENTRAL...WERE MOVING INTO THE SOUTHEAST. OTHERWISE...HOT AND HUMID WEATHER CONTINUED WITH TEMPERATURES RANGING FROM THE MID 80S TO THE UPPER 90S. WINDS WERE SOUTHEAST AT 10 TO 25 MPH. TONIGHT...SCATTERED THUNDERSTORMS...SOME SEVERE WILL CONTINUE TO DEVELOP OVER THE SOUTH CENTRAL AND WILL MOVE INTO THE SOUTHEAST AROUND OR AFTER MIDNIGHT. LOWS TONIGHT WILdL COOL TO THE 60S AND WINDS WILL BECOME LIGHT AND VARIABLE. WEATHER CONDITIONS IN AND AROUND THUNDERSTORMS WILL VARY DRAMATICALLY. EDDY
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 8:30 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 60 min |
| Aug 25, 8:55 PM CDT | Severe Thunderstorm Warning | FSD | Brule | 65 min |
| Aug 25, 9:30 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Charles Mix, Douglas | 60 min |
| Aug 25, 10:00 PM CDT | Severe Thunderstorm Warning | FSD | Brule | 30 min |
| Aug 25, 10:30 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Douglas | 45 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 1990Every severe thunderstorm warning in 1990
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.