Alert archive / Iowa / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 38, NWS Sioux Falls, SD

June 5, 1990O'Brien County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 5, 1990, 4:13 AM CDT for O'Brien County, Iowa. It was in force for 62 min.

The area

The counties it named.

The facts

Issued: Jun 5, 1990, 4:13 AM CDT (09:13 UTC)
Expired: Jun 5, 1990, 5:15 AM CDT
In force: 62 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County O'Brien County, IA

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

Omaha, NE (KOAX), launched 00:00Z, 9.2 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3602 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 161 m²/s²
0-3 km storm-relative helicity: 492 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSUX 050913
SVRSUX
IAC141-051015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE SIOUX CITY IA
413 AM CDT TUE JUN 5 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 515 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY

   IN THE NORTHWEST PART OF IOWA
      NORTHERN OBRIEN

AT 405 AM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS IN
NORTHWEST IOWA 40 TO 70 MILES NORTHEAST OF SIOUX CITY IOWA AND
NEAR SHELDON AND PRIMGHAR. THESE SEVERE STORMS WERE MOVING EAST
AT 35 MILES AND HOUR.

PERSONS IN PRIMGHAR AND SHELDON AND THE SURROUNDING AREA SHOULD
TAKE SHELTER AND PREPARE FOR DAMAGING WINDS AND POSSIBLE LARGE
HAIL.

REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE DAMAGING WINDS IN EXCESS
OF 60 MPH...LARGE HAIL...DEADLY LIGHTNING...AND HEAVY RAINS THAT CAN
QUICKLY FLOOD LOW LYING AREAS. IF YOU ARE IN THE PATH OF THIS STORM
TAKE SHELTER IN A REINFORCED BUILDING IMMEDIATELY.

ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR REPORTS
OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.

KROPP

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, Jun 5, 3:06 AM CDT, 1 hour 7 minutes before

SDZ18-050900-

SPECIAL WEATHER STATEMENT...CORRECTION
NATIONAL WEATHER SERVICE SIOUX FALLS SD
305 AM CDT TUE JUN 5 1990

...INTENSE THUNDERSTORM 30 MILES WEST OF SIOUX FALLS...

AT 3 AM CDT AN INTENSE THUNDERSTORM WITH VERY HEAVY RAIN WAS OVER SOUTH
CENTRAL MCCOOK COUNTY...30 MILES WEST OF SIOUX FALLS...MOVING EAST AT
35 TO 40 MPH. THIS THUNDERSTORM WAS THE STRONGEST IN A LINE EXTENDING
FROM ABOUT 35 MILES NORTHWEST OF SIOUX FALLS TO 40 MILES SOUTHWEST OF
SIOUX FALLS. THE THUNDERSTORMS WILL MOVE INTO MINNEHAHA COUNTY AROUND
330 AM CDT AND COULD REACH THE SIOUX FALLS AREA AROUND 4 AM CDT.

NO SEVERE WEATHER HAD BEEN REPORTED WITH THESE STORMS BUT THERE IS SOME
POTENTIAL FOR THE STORMS TO+ BECOME STRONGER...POSSIBLY PRODUCING HAIL
AND STRONG WINDS. A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR
THIS AREA ALONG WITH OTHER PARTS OF EASTERN SOUTH DAKOTA UNTIL 7 AM CDT.

WILLIAMS

Local storm report, Jun 5, 3:45 AM CDT, 28 minutes before

SEVERE LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX CITY IA
345 AM CDT TUE JUN 5 1990

TIME..CDT..     EVENT

JUN 5 1990
                ...WOODBURY COUNTY IOWA...
1233 AM         WIND GUST OF 59 MILES AN HOUR AT NATIONAL WEATHER
                SERVICE OFFICE AT SIOUX GATEWAY AIRPORT IN SIOUX
                CITY.

1250 AM         AT 200 AM WOODBURY COUNTY EMERGENCY OPERATIONS
   TO           CENTER REPORTS MANY POWER LINES DOWN IN THE SIOUX
130  AM         SIOUX CITY AREA BETWEEN 1250 AM CDT AND 130 AM CDT.

                ...UNION COUNTY SOUTH DAKOTA...
126  AM         SECURITY AT DAKOTA DUNES REPORTED PART OF ROOF OF
                LARGE TRACTOR GARAGE AND TOOL STORAGE BUILDING
                BLOWN OFF. REPORT RELAYED BY WOODBURY COUNTY EOC.

                ...PLYMOUTH COUNTY IOWA...
126 AM          PLYMOUTH COUNTY SHERIFF REPORTS SHORT POWER OUTAGE
                IN THE CITY OF LEMARS.

KROPP
                PERRY CREEK FALLING BUT EXTENSIVE FLOODING IN SIOUX
                CITY WEST SIDE. EVACUATIONS CONTINUING.

850 AM          WOODBURY COUNTY EOC REPORTED THAT PERRY CREEK LEVELS
                WERE FALLING. WESTSIDE AND DOWNTOWN AREAS THAT WERE
                FLOODED MAY 18 1990 WERE FLOODED AGAIN...BUSINESS
                AND RESIDENTIAL AREAS.

KROPP

Local storm report, Jun 5, 3:47 AM CDT, 26 minutes before

SEVERE LOCAL STORM REPORT...DELETED EXTRA MATERIAL FROM MESSAGE
NATIONAL WEATHER SERVICE SIOUX CITY IA
345 AM CDT TUE JUN 5 1990

TIME..CDT..     EVENT

JUN 5 1990
                ...WOODBURY COUNTY IOWA...
1233 AM         WIND GUST OF 59 MILES AN HOUR AT NATIONAL WEATHER
                SERVICE OFFICE AT SIOUX GATEWAY AIRPORT IN SIOUX
                CITY.

1250 AM         AT 200 AM WOODBURY COUNTY EMERGENCY OPERATIONS
   TO           CENTER REPORTS MANY POWER LINES DOWN IN THE SIOUX
130  AM         SIOUX CITY AREA BETWEEN 1250 AM CDT AND 130 AM CDT.

                ...UNION COUNTY SOUTH DAKOTA...
126  AM         SECURITY AT DAKOTA DUNES REPORTED PART OF ROOF OF
                LARGE TRACTOR GARAGE AND TOOL STORAGE BUILDING
                BLOWN OFF. REPORT RELAYED BY WOODBURY COUNTY EOC.

                ...PLYMOUTH COUNTY IOWA...
126 AM          PLYMOUTH COUNTY SHERIFF REPORTS SHORT POWER OUTAGE
                IN THE CITY OF LEMARS.

KROPP
                PERRY CREEK FALLING BUT EXTENSIVE FLOODING IN SIOUX
                CITY WEST SIDE. EVACUATIONS CONTINUING.

850 AM          WOODBURY COUNTY EOC REPORTED THAT PERRY CREEK LEVELS
                WERE FALLING. WESTSIDE AND DOWNTOWN AREAS THAT WERE
                FLOODED MAY 18 1990 WERE FLOODED AGAIN...BUSINESS
                AND RESIDENTIAL AREAS.

KROPP

Local storm report, Jun 5, 3:48 AM CDT, 25 minutes before

SEVERE LOCAL STORM REPORT...DELETED EXTRA MATERIAL FROM MESSAGE
NATIONAL WEATHER SERVICE SIOUX CITY IA
345 AM CDT TUE JUN 5 1990

TIME..CDT..     EVENT

JUN 5 1990
                ...WOODBURY COUNTY IOWA...
1233 AM         WIND GUST OF 59 MILES AN HOUR AT NATIONAL WEATHER
                SERVICE OFFICE AT SIOUX GATEWAY AIRPORT IN SIOUX
                CITY.

1250 AM         AT 200 AM WOODBURY COUNTY EMERGENCY OPERATIONS
   TO           CENTER REPORTS MANY POWER LINES DOWN IN THE SIOUX
130  AM         SIOUX CITY AREA BETWEEN 1250 AM CDT AND 130 AM CDT.

                ...UNION COUNTY SOUTH DAKOTA...
126  AM         SECURITY AT DAKOTA DUNES REPORTED PART OF ROOF OF
                LARGE TRACTOR GARAGE AND TOOL STORAGE BUILDING
                BLOWN OFF. REPORT RELAYED BY WOODBURY COUNTY EOC.

                ...PLYMOUTH COUNTY IOWA...
126 AM          PLYMOUTH COUNTY SHERIFF REPORTS SHORT POWER OUTAGE
                IN THE CITY OF LEMARS.

KROPP

Special weather statement, Jun 5, 3:53 AM CDT, 20 minutes before

SDZ05-12-050945

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HURON SD
345 AM CDT TUE JUN 5 1990

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR PARTS OF EASTERN
   SOUTH DAKOTA...MAINLY IN THE AREA EAST OF THE JAMES RIVER UNTIL
   7 AM CDT...

AT 335 AM CDT...NUMEROUS THUNDERSTORMS...SOME WITH VERY HEAVY RAIN AND
HAIL...CONTINUED OVER NORTHEAST SOUTH DAKOTA IN THE AREA NORTH AND EAST
OF A LINE FROM THE NORTH DAKOTA LINE ABOUT 70 MILES NORTiH OF WATERTOWN...
THROUGH WATERTOWN...TO BROOKINGS.

MOST OF THESE STORMS WERE MOVING EAST AT 60 MILES AN HOUR AND WOULD
MOVE OUT OF SOUTH DAKOTA AND INTO MINNESOTA BY 430 AM CDT.

SPRINGER

Special weather statement, Jun 5, 4:08 AM CDT, 5 minutes before

SDZ018-018-MNZ017-IAZ001-051010-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
405 AM CDT TUE JUN 5 1990

...A SEVERE THUNDERSTORM WATCH FOR EASTERN SOUTH DAKOTA AND THE ADJACENT
COUNTIES OF SOUTHWEST MINNESOTA AND NORTHWEST IOWA UNTIL 7 AM CDT...

A 4 AM CDT A INTENSE THUNDERSTORM WITH VERY HEAVY RAIN DEVELOPED ACROSS
NORTHWEST IOWA ABOUT 35 MILES SOUTHEAST OF SIOUX FALLS NEAR GEORGE.
THIS THUNDERSTORM MAY PRODUCE HAIL AND STRONG SURFACE WINDS AS IT MOVES
TO THE EAST AT 35 MILES AN HOUR.

THIS STORM WAS PART OF AN AREA OF SCATTERED THUNDERSTORMS THAT COVERED
SOUTHEAST SOUTH DAKOTA...NORTHWEST IOWA AND SOUTHWEST MINNESOTA FROM
60 MILES WEST OF SIOUX FALLS NEAR MITCHELL xTO 70 MILES SOUTHEAST OF
SIOUX FALLS NEAR SANBORN IOWA. THESE THUNDERSTORMS MAY ALSO PRODUCE
VERY HEAVY RAIN...SMALL HAIL AND GUSTY SURFACE WINDS AS THEY MOVE
TO THE EAST AT 35 MILES AN HOUR.
BUSS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 5, 12:39 AM CDT	Severe Thunderstorm Warning	FSD	Monona, Plymouth, Woodbury	66 min
Jun 5, 1:19 AM CDT	Severe Thunderstorm Warning	FSD	Sioux	56 min
Jun 5, 1:45 AM CDT	Severe Thunderstorm Warning	FSD	Lyon	30 min
Jun 5, 2:20 AM CDT	Severe Thunderstorm Warning	FSD	Sioux	25 min
Jun 5, 3:56 AM CDT	Severe Thunderstorm Warning	FSD	Osceola	49 min
Jun 5, 3:56 AM CDT	Severe Thunderstorm Warning	FSD	Lyon, Sioux	34 min
Jun 5, 4:42 AM CDT	Severe Thunderstorm Warning	FSD	Cherokee, O'Brien	63 min

Nearby

Severe Thunderstorm Warnings in Iowa, 1990 Every 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.