Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 79, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 27, 1990, 9:34 PM CDT for Lyon County, Iowa; Lincoln County, South Dakota; Rock County, Minnesota. It was in force for 56 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
- Jun 27, 1990, 9:34 PM CDT (02:34 UTC)
- Expired
- Jun 27, 1990, 10:30 PM CDT
- In force
- 56 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Whole counties
Counties Lyon County, IA, Rock County, MN, Lincoln 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 |
|---|---|---|---|
| Jun 27, 10:00 PM CDT | Thunderstorm Wind 0 | Rock, MN |
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, 2.6 hours before the alert went out and 227 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
- 1502 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 2138 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 371 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 17.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KFSD 280247 COR
SVRFSD
IAC119-MNC133-SDC083-280300-
BULLETIN - IMMEDIATE BROADCAST REQUESTED...CORRECTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
934 PM CDT WED JUN 27 1990
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN NORTHWEST IOWA
...WESTERN LYON
IN SOUTHWEST MINNESOTA
...ROCK
IN SOUTHEAST SOUTH DAKOTA
...LINCOLN
SOME CITIES INCLUDED IN THIS WARNING ARE HARRISBURG AND TEA IN SOUTH
DAKOTA...AND INWOOD...LESTER...AND ROCK VALLEY IN NORTHWEST IOWA.
<
AT 930 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM
30 MILES NORTHEAST OF SIOUX FALLS TO 15 MILES SOUTHWEST OF SIOUX
FALLS. THIS LINE OF SEVERE THUNDERSTORMS WAS MOVING SOUTHEAST AT
40 MPH.
NUMEROUS REPORTS OF 50 TO 55 MPH WINDS AND MARBLE SIZE HAIL
HAVE BEEN RECEIVED FROM MINNEHAHA COUNTY AROUND SIOUX FALLS.
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.
THUNDERSTORSMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE
OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.
KAPELAWhat 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 27, 6:28 PM CDT, 3 hours 6 minutes before
SDZALL-270015- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 625 PM CDT WED JUN 27 1990 ...TORNADO WATCH NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA TIL 10 PM CDT. SEVERE THUNDERSRORM WATCH UNTIL MIDNIGHT CDT NORTHWEST SOUTH DAKOTA... A TORNADO WATCH REMAINS IN EFFECT FOR NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA. A SEVERE THUNDERSTORM WATCH HAS ALSO BEEN ISSUED FOR NORTHWEST SOUTH DAKOTA. AT 6 PM CDT SCATTERED THUNDERSTORMS WITH A FEW SEVERE STORMS CONTINUED OVER NORTHEAST SOUTH DAKOTA...WHILE DEVELOPING OVER PARTS OF THE WESTERN THIRD OF SOUTH DAKOTA. OTHERWISE SKIES WERE PARTLY CLOUDY TO MOSTLY SUNNY OVER THE STATE. TEMPERATURES RANGED FROM 69 AT ABERDEEN WHERE A THUNDERSTORM COOLED IT OFF SHARPLY TO 102 AT PIERRE AND CHAMBERLAIN. THROUGH 8 PM CDT SCATTERED THUNDERSTORMS SHOULD MOVE INTO EAST CENTRAL SECTIONS OF THE STATE AS WELL AS INCREASE OVER THE WESTERN HALF...WHILE DECREASING OVER PARTS OF THE NO=RTHEAST. TEMPERATURES WILL FALL 4 TO 8 DEGREES EXCEPT MAY FALL 15 TO 20 DEGREES WHERE A THUNDERSTORM MOVES IN. BIER
Special weather statement, Jun 27, 7:36 PM CDT, 1 hour 58 minutes before
SDZALL-270115-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
735 PM CDT WED JUN 27 1990
...TORNADO WATCH NORTH CENTRAL AND NORTHEAST SOUTH DAKOTA TIL 10 PM
CDT. SEVERE THUNDERSRORM WATCH UNTIL MIDNIGHT CDT FOR THE REST OF
SOUTH DAKOTA EXCEPT FOR THE SOUTHWEST CORNER.
A TORNADO WATCH REMAINS IN EFFECT FOR NORTH CENTRAL AND NORTHEAST SOUTH
DAKOTA. A SEVERE THUNDERSTORM WATCH HAS ALSO BEEN ISSUED FOR THE REST OF
SOUTH DAKOTA EXCEPT FOR THE SOUTHWEST CORNER.
AT 6 PM CDT SCATTERED THUNDERSTORMS WITH A FEW SEVERE STORMS OR STORMS
PRODUCING VERY HEAVY RAIN WERE OVER NORTHEAST...EAST CENTRAL AND THE
WESTERN THIRD OF SOUTH DAKOTA. SOME STORMS WERE ALSO PRODUCING SMALL
STREAM OR URBAN FLOODING. TEMPERATURES RANGED FROM 76 AT WATERTOWN TO
99 AT CHAMBERLAIN.{{}
THROUGH 8 PM CDT SCATTERED THUNDERSTORMS WITH A FEW SEVERE STORMS WILL
DECREASE IN THE NORTHEAST...BUT WILL BE DEVELOPING IN THE SOUTHEAST
AND POSSIBLY PARTS OF THE CENTRAL. TEMPERATURES WILL FALL 5 TO 10
DEGREES EXCEPT MAY FALL 15 TO 20 DEGREES WHERE A THUNDERSTORM MOVES IN.
SMALL STREAM AND URBAN FLOODING WILL CONTINUE TO BE A PROBLEM IN THOSE
AREAS WHERE VERY HEAVY THUNDERSTORM RAINS FALL.
BIER
rSpecial weather statement, Jun 27, 8:10 PM CDT, 1 hour 24 minutes before
SDZ011-012-018-280110- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 810 PM CDT WED JUN 28 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR SOUTHEAST SOUTH DAKOTA AND PARTS OF SOUTHWEST MINNESOTA AND NORTHWEST IOWA... AT 8 PM CDT SEVERE THUNDERSTORMS WITH VERY HEAVY RAIN WERE MOVING INTO SOUTHEAST SOUTH DAKOTA. THESE THUNDERSTORMS EXTENDED FROM 25 MILES NORTH OF SIOUX FALLS NEAR ARTESIAN TO 10 MILES NORTH OF BROOKINGS NEAR BRUCE. THESE STORMS ARE CAPABLE OF PRODUCING GUSTY WINDS...SMALL HAIL...DANGEROUS LIGHTENING AND HEAVY RAINS. MOVEMENT WAS TO THE SOUTHEAST AT 30 MILES AN HOUR. BERG
Special weather statement, Jun 27, 8:55 PM CDT, 39 minutes before
SDZ011-012-018-MNZ17-280300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 855 PM CDT WED JUN 28 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR SOUTHEAST SOUTH DAKOTA AND PARTS OF SOUTHWEST MINNESOTA AND NORTHWEST IOWA... AT 845 PM CDT SEVERE THUNDERSTORMS WITH VERY HEAVY RAIN CONTINUED IN SOUTHEAST SOUTH DAKOTA AND WERE MOVING INTO SOUTHWEST MINNESOTA. THESE THUNDERSTORMS EXTENDED FROM 30 MILES NORTHWEST OF SIOUX FALLS NEAR CANOVA TO NEAR BROOKINGS. THESE STORMS HAVE A HISTORY OF PRODUCING WINDS UP TO 75 MILES AN HOUR AND HAIL TO 1 INCH IN DIAMETER...DANGEROUS LIGHTNING AND HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA. MOVEMENT WAS TO THE SOUTHEAST AT 35 MILES AN HOUR. BERG
Local storm report, Jun 27, 9:08 PM CDT, 26 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HURON SD
905 PM CDT WED JUN 27 1990
STORM DATA FOR WED JUN 27TH
TIME COUNTY...LOCATION CHARACTER OF STORM...DAMAGE
1920 CDT BEADLE COUNTY...8NW HURON 1 INCH HAIL...NWS SPOTTER
1945 CDT BEADLE COUNTY...14 SE HURON 1 INCH HAIL...NWS SPOTTER
2020 CDT BEADLE COUNTY...10 S CAVOUR PEA-MARBLE SIZE HAIL...STRONG
WINDS...NWS SPOTTER
2028 CDT MINER COUNTY...21/2 N HOWARD 3/4 IN HAIL...SHERIFF DEPT
END
ORGISHThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 11:56 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 34 min |
| Jun 28, 12:30 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 30 min |
| Jun 28, 12:49 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien, Plymouth | 41 min |
| Jun 28, 12:58 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola, Sioux | 32 min |
| Jun 28, 1:26 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 34 min |
| Jun 28, 1:37 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien, Plymouth | 53 min |
| Jun 28, 2:08 AM CDT | Severe Thunderstorm Warning | FSD | Ida | 37 min |
| Jun 28, 2:36 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Ida | 69 min |
| Jun 28, 2:36 AM CDT | Severe Thunderstorm Warning | FSD | O'Brien | 69 min |
| Jun 28, 2:58 AM CDT | Severe Thunderstorm Warning | FSD | Sioux | 32 min |
| Jun 28, 3:47 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien | 58 min |
| Jun 27, 7:51 PM CDT | Severe Thunderstorm Warning | FSD | Brookings | 39 min |
| Jun 27, 8:10 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Lake, Moody | 35 min |
| Jun 27, 8:37 PM CDT | Severe Thunderstorm Warning | FSD | Lake, McCook, Minnehaha, Moody | 38 min |
| Jun 27, 9:08 PM CDT | Severe Thunderstorm Warning | FSD | McCook, Minnehaha | 37 min |
| Jun 27, 9:08 PM CDT | Severe Thunderstorm Warning | FSD | Moody | 37 min |
| Jun 27, 11:56 PM CDT | Severe Thunderstorm Warning | FSD | McCook, Minnehaha, Turner | 34 min |
| Jun 28, 7:32 AM CDT | Severe Thunderstorm Warning | FSD | Brookings, Lake, Moody | 43 min |
| Jun 27, 9:34 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 26 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1990Severe Thunderstorm Warnings in South Dakota, 1990Severe Thunderstorm Warnings in Minnesota, 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.