Alert archive / South Dakota / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 129, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 14, 1990, 4:47 PM CDT for Minnehaha County, South Dakota. It was in force for 43 min.
The area
The counties it named.
The facts
- Issued
- Aug 14, 1990, 4:47 PM CDT (21:47 UTC)
- Expired
- Aug 14, 1990, 5:30 PM CDT
- In force
- 43 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.
The nearest sounding before it
Aberdeen, SD (KHON), launched 12:00Z, 9.8 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
- 702 J/kg
- Mixed-layer CIN
- -210 J/kg
- Mixed-layer LCL
- 1660 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFSD 142149
SVRFSD
SDC099-142230-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
447 PM CDT TUE AUG 14 1990
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 530 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTHEAST SOUTH DAKOTA
...MINNEHAHA
SOME CITIES INCLUDED IN THIS WARNING ARE SIOUX FALLS...HARTFORD AND
BRANDON SOUTH DAKOTA.
AT 440 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 20
MILES WESTNORTHWEST OF SIOUX FALLS NEAR MUMBOLDT SOUTH DAKOTA TO 25
MILES NORTHEAST OF SIOUX FALLS JUST EAST OF GARRETTSON SOUTH DAKOTA
MOVING SOUTHEAST AT 10 MILES.
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.
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.
BLOOMWhat 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 14, 3:25 PM CDT, 1 hour 22 minutes before
SDZ017-142100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 325 PM CDT TUE AUG 14 1990 ...A THUNDERSTORM WITH VERY HEAVY RAIN WAS OVER WESTERN HANSON COUNTY OF SOUTHEAST SOUTH DAKOTA... AT 320 PM RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN AND POSSIBLE SMALL HAIL 55 MILES WEST NORTHWEST OF SIOUX FALLS OR JUST EAST OF MITCHELL SOUTH DAKOTA IN EXTREME WESTERN HANSON COUNTY. THIS STORM WAS MOVING EAST SOUTHEAST AT 15O MPH AND WILL CONTINUE TO AFFECT HANSON COUNTY OF SOUTHEAST SOUTH DAKOTA THROUGH 4 PM. PERSONS IN HANSON COUNTY SHOULD KEEP ALERT TO THE CHANGING WEATHER CONDITIONS AND BE PREPARED TO SEEK SHELTER IF THREATENING WEATHER APPROACHES.
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 4:25 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix | 35 min |
| Aug 14, 4:30 PM CDT | Severe Thunderstorm Warning | FSD | Davison, Hanson | 30 min |
| Aug 14, 4:55 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 53 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; the sounding from the Mesonet's radiosonde archive.