Alert archive / South Dakota / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 34, NWS Sioux Falls, SD

May 28, 1991Yankton County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 28, 1991, 11:38 PM CDT for Yankton County, South Dakota. It was in force for 52 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
May 28, 1991, 11:38 PM CDT (04:38 UTC)
Expired
May 29, 1991, 12:30 AM CDT
In force
52 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

County Yankton County, SD

What was reported inside it

TimeReportWhereRemark
May 29, 12:20 AM CDTThunderstorm Wind 80Yankton, 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

Omaha, NE (KOVN), launched 00:00Z, 4.6 hours before the alert went out and 206 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-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 1991-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2095 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 1991-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2095 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1829 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.1
Supercell composite
8.8

Open this sounding in Storm Lab

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, May 28, 9:45 PM CDT, 1 hour 53 minutes before
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Local storm report, May 28, 9:56 PM CDT, 1 hour 42 minutes before
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Special weather statement, May 28, 10:55 PM CDT, 43 minutes before
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Special weather statement, May 28, 11:03 PM CDT, 35 minutes before
SDZ016>020-290500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1100 PM CDT TUE MAY 28 1991

...TORNADO WATCH FOR THE EAST PART OF SOUTH CENTRAL AND ALL OF SOUTH
EAST SOUTH DAKOTA EXPIRES AT 11 PM CDT...
...SEVERE THUNDERSTORM WATCH FOR PART OF SOUTH CENTRAL AND PART OF
SOUTHEAST SOUTH DAKOTA UNTIL 4 AM CDT...

THE TORNADO WATCH HAS EXPIRED BUT A SEVERE THUNDERSTORM WATCH HAS BEEN
ISSUED FOR A SMALL PART OF SOUTH CENTRAL AND SOUTHEAST SOUTH DAKOTA
UNTIL 4 AM CDT.

AT 11 PM CDT THUNDERSTORMS...SOME WITH SMALL HAIL AND VERY HEAVY RAIN
AND STRONG WINDS COVERED A LARGE PART OF SOUTH CENTRAL SOUTH DAKOTA.
ALSO SOME OF THE THUNDERSTORMS WERE OVER THE WEST PART OF SOUTHEAST
SOUTH DAKOTA. THE STROMS WERE MOVING TO THE NORTHEAST AT 40 MPH.

IF SEVERE WEATHER APPROACHES TAKE COVER. IF YOU GET SEVERE WEATHER
CALL YOUR NEAREST LAW ENFORCEMENT AGENCY AND REPORT THE SEVERE WEATHER.

KOSCIELSKI
Special weather statement, May 28, 11:19 PM CDT, 19 minutes before
IAZ001-004-005-280500-

SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR SIOUX CITY AND VICINITY
NATIONAL WEATHER SERVICE SIOUX CITY IA
1118 AM CDT TUE MAY 28 1991

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR THE SIOUXLAND AREA TIL 4 AM..

AT 11 PM A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM 20 MILES WEST
OF SIOUX FALLS SOUTH DAKOTA TO NORFOLK NEBARSKA. THIS LINE WAS MOVING
EAST AT 40 MPH.

THIS LINE OF STORMS IS EXPECTED TO MOVE INTO THE COUNTDIES OF DIXON AND
THURSTON BY 1 AM. STRONG GUSTY WINDS DANGEROUS LIGHTNING AND SMALL
HAIL MAY BE EXPECTED WITH THIS LINE OF STORMS.

TANNER
Special weather statement, May 28, 11:38 PM CDT, 0 minutes before
SDZ005-016-017-018-019-290530-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
1135 PM CDT TUE MAY 28 1991

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR SOUTHEAST SOUTH DAKOTA...

AT 1130 PM CDT...NUMEROUS THUNDERSTORMS CONTINUED OVER CENTRAL AN EASTERN
SOUTH DAKOTA...EAST OF A LINE FROM MOBRIDGE TO MISSION AND SOUTH AND WEST
OF A LINE FROM ABERDEEN TO SIOUX FALLS.

THE STRONGEST STORMS WERE SOUTH OF A LINE FROM BROOKINGS TO CHAMBERLAIN.

MOVEMENT WAS NORTHEAST AT 35 MILES AN HOUR.

SPRINGER

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 11:13 PM CDTSevere Thunderstorm WarningFSDBon Homme, Charles Mix, Douglas62 min
May 28, 11:28 PM CDTSevere Thunderstorm WarningFSDHutchinson62 min
May 28, 11:57 PM CDTSevere Thunderstorm WarningFSDHanson, McCook, Turner48 min
May 29, 12:24 AM CDTSevere Thunderstorm WarningFSDClay36 min
May 29, 1:05 AM CDTSevere Thunderstorm WarningFSDUnion55 min
May 29, 1:19 AM CDTSevere Thunderstorm WarningFSDWoodbury56 min
May 29, 1:19 AM CDTSevere Thunderstorm WarningFSDPlymouth56 min
May 29, 2:00 AM CDTSevere Thunderstorm WarningFSDCherokee60 min
May 29, 12:35 AM CDTSevere Thunderstorm WarningFSDDixon55 min

Nearby

Severe Thunderstorm Warnings in South Dakota, 1991Every severe thunderstorm warning in 1991

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.