Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 92, NWS Twin Cities, MN

July 26, 1987Wabasha County, Winona County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 26, 1987, 3:09 AM CDT for Wabasha County, Winona County, Minnesota. It was in force for 21 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
Jul 26, 1987, 3:09 AM CDT (08:09 UTC)
Expired
Jul 26, 1987, 3:30 AM CDT
In force
21 min
Issued by
NWS Twin Cities, MN
Area
Whole counties

Counties Wabasha County, MN, Winona County, MN

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

TimeReportWhereRemark
Jul 26, 3:10 AM CDTThunderstorm Wind 0Wabasha, 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

Minneapolis, MN (KSTC), launched 00:00Z, 8.2 hours before the alert went out and 149 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 1987-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2406 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1987-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.1939587897Sfc1 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
2406 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
1047 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
217 m²/s²
Significant tornado parameter
3.3
Supercell composite
13.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 260809
SVRRST
MNC157-169-260845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
309 AM CDT SUN JUL 26 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL  330 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTHEAST MINNESOTA
          ...NORTHEASTERN WABASHA...NORTHERN WINONA
...INCLUDES THE CITIES OF WABSHA, PLAINVIEW, AND WINONA...
 
ROCHESTER NATIONAL WEATHER SERVICE RADAR INDICATES A SEVERE
THUNDERSTORM NEAR LAKE CITY MN MOVING SOUTHEAST AT 40 MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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, Jul 25, 9:38 PM CDT, 5 hours 31 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST. CLOUD MN
935 PM CDT SAT JUL 25 1987

...SEVERE THUNDERSTORM WATCH FOR CENTRAL MINNESOTA UNTIL 10PM CDT...

AT 932 PM CDT RADAR INDICATED AN VERY STRONG THUNDERSTORM IN WESTERN
STEARNS COUNTY NEAR ELROSA...35 MILES WEST OF ST. CLOUD. THIS STORM
HAD BEEN INCREASING IN INTENSITY AND MAY PRODUCE STRONG WINDS...HAIL
AND WILL HAVE FREQUENT AND DANGEROUS LIGHTNING WITH IT AS IT MOVES
SOUTHEAST AT 40 MPH. SOME COMMUNITIES IN THIS STORMS PATH ARE
ROSCOE...PAYNESVILLE...SPRING HILL AND ST. MARTIN. PEOPLE IN THESE
TOWNS SHOULD BE READY TO MOVE TO SAFETY IF THIS STORM BECOMES SEVERE.

DE VOE
Special weather statement, Jul 25, 9:59 PM CDT, 5 hours 10 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
950 PM CDT SAT JUL 25 1987

...SEVERE THUNDERSTORM WATCH IN AFFECT FOR MUCH OF WEST CENTRAL
     AND CENTRAL MINNESOTA WILL EXPIRE AT 10 PM CDT...

AT 940 PM CDT..AN AREA OF VERY STRONG THUNDERSTORMS WAS LOCATED ACROSS
PARTS OF WESTERN AND CENTRAL STEARNS COUNTY TO THE WEST OF ST CLOUD FROM
NEAR ELROSA TO ALBANY OF CENTRAL MINNESOTA.

NO SEVERE WEATHER HAS BEEN REPORTED WITH THESE THUNDERSTORMS BUT BRIEF
HEAVY RAINS..FREQUENT LIGHTNING AND POSSIBLE SMALL HAIL ARE LIKELY WITH
THESE STORMS AS THEY MOVE TO THE SOUTHEAST AT 40 TO 45 MILES AN HOUR.

OTHER SHOWERS AND THUNDERSTORMS .A FEW OF THEM STRONG..WERE OCCURRING
OVER PARTS OF WEST CENTRAL AND NORTHWEST WISCONSIN MAINLY IN AREAS
NORTH AND NORTHEAST OF EAU CLAIRE FROM NEAR BLOOMER TO THORP.

MOVEMENT WAS SOUTHEAST AT 50 TO 55 MILES AN HOUR.
SWANBERG
Special weather statement, Jul 25, 10:59 PM CDT, 4 hours 10 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1050 PM CDT SAT JUL 25 1987

AT 1055 PM CDT..AN AREA OF VERY STRONG THUNDERSTORMS WAS LOCATED ACROSS
PARTS OF WESTERN..CENTRAL AND EAST CENTRAL MINNESOTA AS WELL AS
WESTERN WISCONSIN.

NO SEVERE WEATHER HAS BEEN REPORTED WITH THESE THUNDERSTORMS BUT BRIEF
HEAVY RAINS..FREQUENT LIGHTNING AND POSSIBLE SMALL HAIL AND GUSTY WINDS
ARE POSSIBLE WITH THESE STORMS AS THEY MOVE TO THE SOUTHEAST AT 40
MILES AN HOUR.  THESE THUNDERSTORMS WILL BE APPROACHING THE TWIN CITY
METRO AREA ABOUT 1130 PM CDT.

OTHER SHOWERS AND THUNDERSTORMS .A FEW OF THEM STRONG..WERE OCCURRING
FROM EAST OF EAU CLAIRE TO NEAR WESTBORO IN WISCONSIN.

MOVEMENT WAS SOUTHEAST AT 40 MILES AN HOUR.
KME
SWANBERG
Special weather statement, Jul 25, 11:59 PM CDT, 3 hours 10 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1150 PM CDT SAT JUL 25 1987

AT 1155 PM CDT..AN AREA OF VERY STRONG THUNDERSTORMS WAS LOCATED ACROSS
PARTS OF WESTERN..CENTRAL AND EAST CENTRAL MINNESOTA AND EXTENDED INTO
WESTERN WISCONSIN.

THESE VERY STRONG THUNDERSTORMS WERE LOCATED IN THE WESTERN AND NORTHERN
PORTIONS OF THE TWIN CITIES METRO AREA AND ARE MOVING TO THE SOUTHEAST
AT 40 MILES AN HOUR.

IN WISCONSIN INTENSE THUNDERSTORMS WERE LOCATED NEAR BALDWIN
AND NEW RICHMOND.

THE MAIN THREAT WITH THESE STORMS IS BRIEF HEAVY RAIN..FREQUENT LIGHTNING
..GUSTY WIND AND POSSIBLE HAIL WITH THIS ACTIVITY AS IT MOVES SOUTHEAST
RAPIDLY AT 401 MILES AN HOUR.
KME
Special weather statement, Jul 26, 2:10 AM CDT, 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST. CLOUD MN
215 AM CDT SUN JUL 26 1987

...SEVERE THUNDERSTORM WATCH FOR CENTRAL MINNESOTA UNTIL 7 AM CDT...

AT 210 AM CDT RADAR INDICATED THUNDERSTORMS NORTH AND EAST OF A LINE
FROM JUST SOUTH OF FARGO NORTH DAKOTA TO ALEXANDRIA TO WILLMAR AND
TO THE TWIN CITIES. SOME OF THESE STORMS HAD PRODUCED HEAVY RAIN.
BETWEEN 1 AND 2AM CDT SMALL HAIL AND VERY HEAVY RAIN
WAS REPORTED IN MEEKER COUNTY AT EDEN VALLEY...AND HEAVY RAIN WAS
REPORTED AT DASSEL...35 MILES SOUTH OF ST. CLOUD. NO SEVERE WEATHE
HAD BEEN REPORTED.

DE VOE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 11:13 PM CDTSevere Thunderstorm WarningMPXMcLeod, Meeker, Renville47 min
Jul 26, 12:17 AM CDTSevere Thunderstorm WarningMPXStearns58 min
Jul 26, 2:14 AM CDTSevere Thunderstorm WarningMPXMcLeod26 min
Jul 26, 2:14 AM CDTSevere Thunderstorm WarningMPXCarver46 min
Jul 26, 3:31 AM CDTSevere Thunderstorm WarningMPXWabasha, Winona29 min
Jul 26, 6:17 AM CDTSevere Thunderstorm WarningMPXMorrison, Stearns, Todd58 min
Jul 26, 9:24 AM CDTSevere Thunderstorm WarningMPXWright36 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1987Every severe thunderstorm warning in 1987

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.