Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 109, NWS Twin Cities, MN

August 26, 1990Olmsted County, Wabasha County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 26, 1990, 5:42 AM CDT for Olmsted County, Wabasha County, Minnesota. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Aug 26, 1990, 5:42 AM CDT (10:42 UTC)
Expired
Aug 26, 1990, 6:45 AM CDT
In force
63 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Olmsted County, MN, Wabasha County, MN

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

Minneapolis, MN (KSTC), launched 00:00Z, 10.7 hours before the alert went out and 129 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, Minneapolis, MN at 00:00Z on 1990-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3299 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, Minneapolis, MN at 00:00Z on 1990-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 square meters per square second.19395878Sfc1 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
3299 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
1021 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
200 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 261042
SVRRST
MNC157-109-261145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING 
NATIONAL WEATHER SERVICE ROCHESTER MN
542 AM CDT SUN AUG 26 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 645 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE SOUTHEAST PART OF MINNESOTA
      WABASHA...EASTERN OLMSTED

THIS WARNING INCLUDES THE TOWNS OF EYOTA...ST.CHARLES...AND WABASHA.

AT 525 AM CDT A SEVERE THUNDERSTORM WAS LOCATED NEAR ROCHESTER
AND WAS MOVING EAST AT 35  MPH TOWARD EYOTA...ST. CHARLES...AND
WABASHA.  AT 525 AM CDT WIND GUSTS OF 60 MPH WERE RECORDED AT
THE ROCHESTER AIRPORT.

IF YOU ARE IN AN AREA THREATENED BY THE STORM...GO TO A REINFORCED
SHELTER AND PREPARE FOR DAMAGING WIND...LARGE HAIL...VERY HEAVY
RAIN...AND LIGHTNING.

REMEMBER...SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.  BE ON THE LOOKOUT.

SWENSON

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, Aug 26, 2:16 AM CDT, 3 hours 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORECAST OFFICE MINNEAPOLIS/ST PAUL MN
220 AM CDT SAT AUG 25 1990

THE NATIONAL WEATHER SERVICE HAS CLEARED A PORTION OF SEVERE
THUNDERSTORM WATCH NUMBER 680. THE COUNTIES THAT HAVE BEEN CLEARED
FROM THE WATCH ARE...

NORTHCENTRAL.......HUBBARD..NORTHERN CASS

CENTRAL............WADENA..SOUTHERN CASS..CROW WING..TODD..MORRISON..
                    STEARNS..BENTON..KANDIYOHI..MEEKER..

EASTCENTRAL........AITKIN..MILLE LACS..

 JHM
Special weather statement, Aug 26, 2:55 AM CDT, 2 hours 47 minutes before
MNZ012-014-016-017-WIZ003-006-260845-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
 255 AM CDT SUN AUG 26 1990

 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR CENTRAL SECTIONS OF
MINNESOTA INCLUDING THE TWIN CITIES METRO AREA UNTIL 5AM...

AT 245 AM CDT...STRONG THUNDERSTORMS CONTINUED OVER EAST CENTRAL
AND SOUTHWEST MINNESOTA AND EXTENDED INTO NORTHWEST WISCONSIN.

THE STRONGEST STORMS WERE LOCATED OVER CARVER...HENNEPIN...ANOKA AND
ISANTI COUNTIES IN EAST CENTRAL MINNESOTA AND IN BURNETT COUNTY IN
NORTHWEST WISCONSIN.
VERY HEAVY RAINS...SMALL HAIL AND WIND GUSTS FROM 40 TO 50 MPH CAN
BE EXPECTED WITH THE STORMS AS THEY MOVE EAST NORTHEAST AT 35 MPH.
THE STORMS WILL BE MOVING THRU THE TWIN CITIES AREA BETWEEN 3 AM AND
4AM THIS MORNING.

STRONG THUNDERSTORMS WERE ALSO LOCATED OVER SOUTHWEST MINNESOTA
 FROM NEAR MARSHALL TO NEAR REDWOOD FALLS.

MOVEMENT WAS ALSO EAST NORTHEAST AT 35 MILES AN HOUR.
SES

Special weather statement, Aug 26, 3:51 AM CDT, 1 hour 51 minutes before
MNZ012-014-016-017-WIZ003-006-260945-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
350 AM CDT SUN AUG 26 1990

 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR CENTRAL SECTIONS OF
MINNESOTA INCLUDING THE TWIN CITIES METRO AREA UNTIL 5AM...

AT 333 AM CDT...STRONG THUNDERSTORMS CONTINUED OVER EAST CENTRAL
AND SOUTHWEST MINNESOTA AND EXTENDED INTO NORTHWEST WISCONSIN.

THE STRONGEST STORMS EXTENDED FROM NEAR NEW ULM TO HUTCHINSON THEN
ACROSS THE NORTHERN SECTIONS OF THE TWIN CITIES METRO AREA TO NEAR
ST CROIX FALLS TO SOUTH OF RUSH CITY.
VERY HEAVY RAINS...HAIL UP 1/2 INCH IN DIAMETER ALONG WITH WIND GUSTS
OF 40 TO 50 MPH HAVE BEEN REPORTED WITH THE STORMS. ALSO A PERSON WAS
STRUCK BY LIGHTNING AT PLYMOUTH IN THE NORTHERN SUBURBS OF THE TWIN CITIES
ABOUT 3AM THIS MORNING.

STRONG THUNDERSTORMS WILL BE LOCATED ALONG A LINE FROM NEAR RICE LAKE
IN WEST CENTRAL WISCONSIN THEN ACROSS THE TWIN CITIES METRO AREA
THRBU LE SEUR TO NEAR MANKATO FROM 415 TO 5AM THIS MORNING.
SES
Special weather statement, Aug 26, 4:55 AM CDT, 47 minutes before
MNZ016-018-019-WIZ003-006-261045-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
450 AM CDT SUN AUG 26 1990

 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR CENTRAL SECTIONS OF
MINNESOTA INCLUDING THE TWIN CITIES METRO AREA UNTIL 5AM...

AT 435 AM CDT...AN AREA OF STRONG THUNDERSTORMS WAS LOCATED FROM SOUTH
CENTRAL INTO EAST CENTRAL MINNESOTA AND THEN INTO WEST CENTRAL WISCONSIN.

THE STRONGEST STORMS WERE LOCATED FROM SOUTHEAST OF MANKATO THRU THE TWIN
CITIES THEN EAST AND SOUTHEAST ACROSS WEST CENTRAL WISCONSIN THRU
EAU CLAIRE TO NEAR MARSHFIELD.

VERY HEAVY RAINS ALONG WITH PEA TO MARBLE SIZE HAIL AND WIND GUSTS OF
40 TO 50 MPH CAN BE EXPECTED WITH THE STORMS AS THEY MOVE EAST AT 35 MILES
AN HOUR. SOME STREET FLOODING MAY ALSO OCCUR WITH THESE STORMS AS THEY
REPEATEDLY MOVE OVER THE SAME AREAS.
THE STORMS WILL BE LOCATED ALONG A LINE FROM NEAR WAUSAU WISCONSIN
THRU EAU CLAIRE THEN DOWN THRU RED WING TO WEST OF ROCHESTER BETWEEN
5 AM 6AM THIS MORNING.
SES
Special weather statement, Aug 26, 5:25 AM CDT, 17 minutes before
MNZ016-018-019-WIZ003-006-261200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
520 AM CDT SUN AUG 26 1990

 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 7AM FOR MUCH OF CENTRAL
AND NORTHERN WISCONSIN...

AT 520 AM A LINE OF VERY STRONG THUNDERSTORMS WAS LOCATED ACROSS WESTERN
DUNN...NORTHERN PEPIN...AND INTO BARRON COUNTY OF WEST CENTRAL WISCONSIN.
IT STRETCHED NORTH TO SOUTH FROM NEAR BARRON IN BARRON COUNTY TO NEAR
THE WHEELER...MENOMONINE AREA OF DUNN COUNTY INTO THE DURAND AREA OF
PEPIN COUNTY.  THE LEADING EDGE WAS ABOUT 15 MILES WEST OF EAU CLAIRE.

VERY HEAVY RAINS ALONG WITH PEA TO MARBLE SIZE HAIL AND WIND GUSTS OF
40 TO 50 MPH CAN BE EXPECTED WITH THE STORMS AS THEY MOVE EAST AT 35 MILES
AN HOUR. SOME STREET FLOODING MAY ALSO OCCUR WITH THESE STORMS AS THEY
REPEATEDLY MOVE OVER THE SAME AREAS.  SOME CITIES IN THE PATH OF THESE
THUNDERSTORMS BETWEEN 525 AND 625 AM ARE...EAU CLAIRE..CHIPPEWA FALLS..
BLOOMER..AND CORNELL.
OTHER VERY STRONG THUNDERSTORMS EXTENDED ACROSS SOUTHEAST MINNESOTA
FROM AROUND 15 MILES WEST OF ROCHESTER INTO THE WABASHA AREA.
PAULSON

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 8:05 PM CDTSevere Thunderstorm WarningMPXTodd55 min
Aug 25, 11:07 PM CDTSevere Thunderstorm WarningMPXMorrison53 min
Aug 25, 11:52 PM CDTSevere Thunderstorm WarningMPXPope38 min
Aug 26, 12:20 AM CDTSevere Thunderstorm WarningMPXStearns55 min
Aug 26, 12:36 AM CDTSevere Thunderstorm WarningMPXMorrison, Todd54 min
Aug 26, 12:52 AM CDTSevere Thunderstorm WarningMPXBenton38 min
Aug 26, 1:11 AM CDTSevere Thunderstorm WarningMPXMille Lacs, Sherburne64 min
Aug 26, 3:06 AM CDTSevere Thunderstorm WarningMPXAnoka, Hennepin54 min
Aug 26, 6:22 AM CDTSevere Thunderstorm WarningMPXWinona53 min

Nearby

Severe 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; the sounding from the Mesonet's radiosonde archive.