Alert archive / South Dakota / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 115, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jul 18, 1990, 7:12 PM CDT for Minnehaha County, South Dakota. It was in force for 28 min. 1 report 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
- Jul 18, 1990, 7:12 PM CDT (00:12 UTC)
- Expired
- Jul 18, 1990, 7:40 PM CDT
- In force
- 28 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
County Minnehaha 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 |
|---|---|---|---|
| Jul 18, 7:37 PM CDT | Hail 2 | Minnehaha, 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, 0.2 hours before the alert went out and 187 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
- 398 J/kg
- Mixed-layer CIN
- -334 J/kg
- Mixed-layer LCL
- 1369 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 329 m²/s²
- 0-3 km storm-relative helicity
- 643 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 26.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFSD 190022 COR
SVRFSD
SDC099-190045-
BULLETIN - IMMEDIATE BROADCAST REQUESTED...CORRECTED TO INCLUDE MOVEMENT
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
712 PM CDT WED JUL 18 1990
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTHEAST SOUTH DAKOTA
...MINNEHAHA
SOME CITIES INCLUDED IN THIS WARNING ARE BALTIC...SIOUX
FALLS...BRANDON...GARRETSON AND SHERMAN.
AT 710 PM CDT RADAR INDICATED A LINE OF SEVERE NEAR SHERMAN TO 15
MILES NORTHWEST OF SIOUX FALLS NEAR LYONS AND WERE MOVING SOUTH AT 10
MILES AN HOUR.
OBSERVERS REPORTED 11/2 INCH TO 3 INCH SIZE HAIL AT BALTIC.
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.k
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.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 18, 6:20 PM CDT, 52 minutes before
SDZ016-020-MNZ017-190015 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 615 PM CDT WED JUL 18 1990 AT 605 PM CDT SIOUX FALLS RADAR SHOWED SCATTERED THUNDERSTORMS NORTH OF A LINE FROM CHAMBERLAIN THROUGH MITCHELL AND COLTON TO FULDA MINNESOTA...15 MILES NORTH OF WORTHINGTON. < SOME OF THE THESE STORMS WERE INTENSE WITH VERY HEAVY DOWNPOURS... SOME HAIL AND STRONG GUSTY WINDS. THE STRONGEST STORMS IN SOUTH DAKOTA WERE JUST NORTH OF CHAMBERALAIN...AND ALONG AND JUST SOUTH OF HIGHWAY 34 FROM WENTWORTH TO LETCHER. IN MINNESOTA THE STRONGEST STORMS WERE ABOUT 30 MILES NORTH OF WORTHINGTON NEAR CURRIE. < GENERAL MOVEMENT WAS SOUTHEAST AT 20 MILES AN HOUR. BLAIR
Special weather statement, Jul 18, 6:26 PM CDT, 46 minutes before
SDZALL-190025- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 625 PM CDT WED JUL 18 1990 ...TORNADO WATCH MUCH OF CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 9 PM CDT... A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 9 PM CDT... AT 615 PM CDT SCATTERED THUNDERSTORMS CONTINUED OVER CENTRAL...EASTERN AND PARTS OF SOUTHWEST SOUTH DAKOTA. LOCALLY HEAVY RAIN...STRONG GUSTY WINDS AND HAIL HAS BEEN OCCURRING WITH SOME OF THESE STORMS. OTHERWISE SKIES WERE PARTLY CLOUDY OVER THE STATE. TEMPERATURES RANGED FROM 66 AT BROOKINGS TO 93 AT CHAMBERLAIN. THROUGH 8 PM CDT SCATTERED THUNDERSTORMS WILL CONTINUE OVER CENTRAL AND EASTERN SOUTH DAKOTA WITH A FEW ALSO POSSIBLE OVER THE WESTERN THIRD OF THE STATE. A FEW SEVERE STORMS WILL CONTINUE TO BE POSSIBLE CENTRAL AND EAST. TEMPERATURES WILL FALL 3 TO 6 DEGREES...EXCEPT THEY MAY FALL OR RISE ABOUT 15 DEGREES IN THOSE AREAS WHERE THUNDERSTORMS MOVE INTO OR AWAY FROM. BIER
Local storm report, Jul 18, 6:45 PM CDT, 27 minutes before
STORM REPORT NATIONAL WEATHER SERVICE HURON SD 643 PM CDT WED JUL 18 1990 STORM DATA FOR WED JUL 18TH TIME COUNTY...LOCATION CHARACTER OF STORM...DAMAGE 1821 CDT SANBORN COU NTY...2W LETCHER 3/4 INCH HAIL...NWS SPOTTER END FREDERICK
Special weather statement, Jul 18, 6:52 PM CDT, 20 minutes before
SDZALL-190015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 650 PM CDT WED JUL 18 1990 ...TORNADO WATCH MUCH OF CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 9 PM CDT... AT 640 PM CDT A LINE OF THUNDERSTORMS FROM 30 MILES NORTHEAST OF SIOUX FALLS TO 15 MILES SOUTHWEST OF MITCHELL. THESE THUNDERSTORMS HAVE A HISTORY OF WIND GUSTS TO 50 MILES AN HOUR... HAIL RANGING FROM PEA TO DIME SIZE...FREQUENT LIGHTNING STRIKES AND VERY HEAVY RAINFALL CAUSING SOME URBAN AND LOW LAND FLOODING. THE LINE OF THUNDERSTORMS IS MOVING SOUTHEAST AT 5 MILES AN HOUR. IF YOU ARE IN THE PATH OF THESE STORMS YOU SHOULD TAKE SHELTER IN A REINFORCED BUILDING. YOU SHOULD ALSO STAY TUNED TO NOAA WE-ATHER RADIO OR YOUR LOCAL MEDIA FOR UPDATES DURING THIS HAZARDOUS WEATHER SITUATION. EDDY
Special weather statement, Jul 18, 6:57 PM CDT, 15 minutes before
SDZALL-190015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 655 PM CDT WED JUL 18 1990 ...TORNADO WATCH MUCH OF CENTRAL AND EASTERN SOUTH DAKOTA UNTIL 9 PM CDT... AT 650 PM CDT A LINE OF THUNDERSTORMS WAS MOVING INTO NORTHERN SIOUX FALLS AND WILL AFFECT THE SIOUX FALLS AREA BY 730 PM. THESE THUNDERSTORMS HAVE A HISTORY OF WIND GUSTS TO 50 MILES AN HOUR... HAIL RANGING FROM PEA TO DIME SIZE...FREQUENT LIGHTNING STRIKES AND VERY HEAVY RAINFALL CAUSING SOME URBAN AND LOW LAND FLOODING. THE LINE OF THUNDERSTORMS IS MOVING SOUTHEAST AT 5 MILES AN HOUR. IF YOU ARE IN THE PATH OF THESE STORMS YOU SHOULD TAKE SHELTER IN A REINFORCED BUILDING. YOU SHOULD ALSO STAY TUNED; TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR UPDATES DURING THIS HAZARDOUS WEATHER SITUATION. EDDY
Local storm report, Jul 18, 7:09 PM CDT, 3 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
708 PM CDT WED JUL 18 1990
STORM DATA FOR WED JUL 18TH
TIME COUNTY...LOCATION CHARACTER OF STORM...DAMAGE
1812 CDT STANLEY COUNTY...2E HAYES 1 3/4 INCH HAIL...NWS SPOTTER
1848 CDT STANLEY COUNTY...2E HAYES 1 3/4 INCH HAIL...NWS SPOTTER
1840 CDT MINER COUNTY...2N EPIPIPHANY MARBLE AND LARGER SIZE HAIL
SHERIFF
1847 MCDT STANLEY COUNTY...7SE HAYES 1 3/4 INCH HAIL...NWS SPOTTER
END
FREDERICKThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:50 PM CDT | Severe Thunderstorm Warning | FSD | Brule | 25 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.