Alert archive / Iowa / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 90, NWS Sioux Falls, SD

June 28, 1990Sioux County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 28, 1990, 2:58 AM CDT for Sioux County, Iowa. It was in force for 32 min. 3 reports 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 28, 1990, 2:58 AM CDT (07:58 UTC)
Expired: Jun 28, 1990, 3:30 AM CDT
In force: 32 min
Issued by: NWS Sioux Falls, SD
Area: Whole counties

County Sioux County, IA

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
Jun 28, 3:10 AM CDT	Hail 2	Sioux, IA
Jun 28, 3:15 AM CDT	Thunderstorm Wind 50	Sioux, IA
Jun 28, 3:20 AM CDT	Hail 2.5	Sioux, IA

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 (KOAX), launched 00:00Z, 8.0 hours before the alert went out and 197 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: 3614 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 202 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 KFSD 280800
SVRFSD
IAC167-280830-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
258 AM CDT THU JUN 28 1990
 
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  330 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTHWEST IOWA
          ...EASTERN SIOUX
 
SOME CITIES INCLUDED IN THIS WARNING ARE ORANGE CITY...ALTON...
AND NEWKIRK IOWA.
 
AT 300 AM CDT RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 45 MILES
SOUTHEAST OF SIOUX FALLS NEAR NEWKIRK IOWA...MOVING EAST/SOUTHEAST
AT 35 MPH.
 
IF YOU ARE IN THE PATH OF THIS STORM...YOU SHOULD GET TO A
REINFORCED SHELTER. A SEVERE THUNDERSTORM PRODUCDES 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.
KAPELA

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

Local storm report, Jun 28, 1:50 AM CDT, 1 hour 8 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
145 PM CDT THU JUN 28 1990

STORM DATA FOR WED JUN 27 AND THU JUN 28 1990

 TIME          COUNTY...LOCATION AND STATE   CHARACTER OF STORM...DAMAGE
.......................................................................

 857 PM CDT   MINNEHAHA...COLTON             50 MPH WINDS.
 908 PM CDT   MINNEHAHA...DELL RAPIDS        3/4 INCH HAIL.
 908 PM CDT   MINNEHAHA...HUMBHOLDT          DUST STORM 40 TO 50 MPH
                                             WINDS.
 910 PM CDT   MINNEHAHA...1 N LYONS          DUST STORM
 911 PM TO    MINNEHAHA...4 N HARTFORD       45 TO 50 MPH WINDS. 1/2
 914 PM CDT                                  MILE VISIBILITY IN DUST.
                                             HEAVY RAIN. PEA SIZE HAIL.
 914 PM CDT   MINNEHAHA...BALTIC             MODERATE RAIN 40 TO 50 MPH
                                             WINDS.
 918 PM CDT   MINNEHAHA...LYONS              55 MPH WINDS PEA TO MARBLE
                                             SIZE HAIL. 100 FEET
                                             VISIBILITY IN HEAVY RAIN.
 920 PM CDT   MINNEHAHA...BALTIC             40 TO 50 MPH WINDS. PEA
                                             SIZED HAIL.
 925 PM CDT   MINNEHAHA...RENNER             NW WINDS 35 TO 40 MPH.
 928 PM CDT   MINNEHAHA...RENNER             HEAVY RAIN...MARBLE HAIL
                                             NORTHWEST WINDS 35 TO 40
                                             MPH.
 1052 PM CDT  MINNEHAHA...DELLS              MARBLE SIZE HAIL.

BIER

Special weather statement, Jun 28, 1:59 AM CDT, 59 minutes before

SDZ003-015-280740

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
150 AM CDT THU JUN 28 1990

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PARTS OF NORTHERN SOUTH DAKOTA
UNTIL 4 AM CDT AND PARTS OF SOUTHEAST SOUTH DAKOTA UNTIL 5 AM CDT...

AT 125 AM CDT...ISOLATED THUNDERSTORMS WERE OCCURRING OVER SOUTH
CENTRAL SOUTH DAKOTA. THE THUNDERSTORMS WERE IN A 35 MILE WIDE AREA
JUST SOUTHEAST OF WINNER ALONG THE SOUTH DAKOTA AND NEBRASKA BORDER.

THE STRONGEST THUNDERSTORM WAS 25 MILES SOUTHEAST OF WINNER.

MOVEMENT WAS EAST AT 35 MILES AN HOUR.

ALSO...SCATTERED THUNDERSTORMS WITH LIGHT RAIN CONTINUED OVER NORTH
CENTRAL SOUTH DAKOTA IN THE AREA ALONG AND WEST OF THE MISSOURI RIVER.
THE STRONGEST THUNDERSTORM WAS 30 MILES SOUTHWEST OF MOBRIDGE.
MOVEMENT WAS EAST AT 30 MILES AN HOUR.
MOHR

Special weather statement, Jun 28, 2:07 AM CDT, 51 minutes before

IAZ001-280800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
205 AM CDT THU JUN 28 1990

...SEVERE WEATHER WARNING FOR NORTHERN SIOUX AND SOUTHERN LYON
COUNTIES OF NORTHWEST IOWA EXPIRED AT 2 AM...

AT 2 AM CDT THE SEVERE THUNDERSTORM WARNING EXPIRED FOR NORTHERN SIOUX
AND SOUTHERN LYON COUNTIES OF NORTHWEST IOWA. THUNDERSTORMS CONTINUE
IN NORTHWEST IOWA...BUT WERE NOT NOW SEVERE IN EXTREME NORTHWEST
IOWA AND NO ADDITIONAL WARNINGS WILL BE ISSUED AT THIS TIME.

UMLAND

Special weather statement, Jun 28, 2:09 AM CDT, 49 minutes before

SDZ019-MNZ017-IAZ001-280810-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
208 AM CDT THU JUN 28 1990

...SEVERE THUNDERSTORM WATCH SOUTHEAST TIL 5 AM CDT...
...FLASH FLOOD WATCH SOUTHEAST TIL 5 AM CDT...

AT 2 AM CDT THUNDERSTORMS WITH HEAVY RAIN...GUSTY WINDS...SMALL HAIL
AND DANGEROUS LIGHTNING CONTINUED IN SOUTHWEST MINNESOTA AND NORTHWEST
IOWA.

THESE THUNDERSTORMS WERE EAST OF A LINE FROM 25 MILES NORTHEAST OF
SIOUX FALLS NEAR PIPESTONE TO 45 MILES SOUTHEAST OF SIOUX FALLS NEAR
SIOUX CENTER IOWA.  MOVEMENT WAS EAST SOUTHEAST AND 35 MILES AN HOUR.

ANOTHER NEW DEVELOPMENT EXTENDED FROM 25 MILES SOUTHEAST OF CHAMBERLAIN
NEAR PLATTE TO 55 MILES SOUTHEAST OF CHAMBERLAIN NEAR BUTTE.  THIS AREA
WAS INCREASING IN INTENSITY AS IT MOVED EAST AT 35 MILES AN HOUR.
 BERG

Special weather statement, Jun 28, 2:55 AM CDT, 3 minutes before

SDZ017-019-MNZ017-IAZ001-280800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
255 AM CDT THU JUN 28 1990

...SEVERE THUNDERSTORM WATCH SOUTHEAST TIL 5 AM CDT...
...FLASH FLOOD WATCH SOUTHEAST TIL 5 AM CDT...

AT 245 AM CDT THUNDERSTORMS WITH HEAVY RAIN...GUSTY WINDS...SMALL HAIL
AND DANGEROUS LIGHTNING CONTINUED IN SOUTHWEST MINNESOTA AND NORTHWEST
IOWA.

THESE THUNDERSTORMS WERE EAST OF A LINE FROM 35 MILES NORTHEAST OF
SIOUX FALLS NEAR TROSKY MINNESOTA TO 40 MILES SOUTHEAST OF SIOUX FALLS
NEAR SIOUX CENTER IOWA.  MOVEMENT WAS EAST SOUTHEAST AT 35 MILES AN
HOUR.

ANOTHER AREA OF THUNDERSHOWERS CONTINUED IN SOUTHCENTRAL SOUTH DAKOTA.
THESE THUNDERSHOWERS WERE 20 MIL?ES SOUTHWEST WEST OF MITCHELL TO 45
MILES SOUTHWEST OF MITCHELL NEAR PICKSTOWN.  MOVEMENT WAS EAST AT 35
MILES AN HOUR.
 BERG

Special weather statement, Jun 28, 2:57 AM CDT, 1 minute before

SDZ003-019-280740

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE HURON SD
255 AM CDT THU JUN 28 1990

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PARTS OF NORTHERN SOUTH DAKOTA
UNTIL 4 AM CDT AND PARTS OF SOUTHEAST SOUTH DAKOTA UNTIL 5 AM CDT...

AT 230 AM CDT...ISOLATED THUNDERSTORMS CONTINUED OVER SOUTH CENTRAL
SOUTH DAKOTA. THE THUNDERSTORMS WERE IN A 40 MILE WIDE AREA
ALONG AND 25 MILES EITHER SIDE OF THE MISSOURI RIVER ALONG THE SOUTH
DAKOTA AND NEBRAKA BORDER.

THE STRONGEST THUNDERSTORM WAS 15 MILES SOUTH OF PLATTE SOUTH DAKOTA.

MOVEMENT WAS EAST AT 35 MILES AN HOUR.

ALSO...SCATTERED THUNDERSTORMS WITH LIGHT RAIN CONTINUED OVER NORTH
CENTRAL SOUTH DAKOTA IN@ A 50 MILE WIDE AREA NORTH OF A FAITH...EAGLE
BUTTE...GETTSBURG LINE.
MOVEMENT WAS EAST AT 35 MILES AN HOUR

MOHR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 9:34 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	56 min
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, 3:47 AM CDT	Severe Thunderstorm Warning	FSD	Cherokee, O'Brien	58 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.