Alert archive / Minnesota / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 49, NWS Twin Cities, MN

July 11, 1987Wabasha County, Winona County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 11, 1987, 5:48 PM CDT for Wabasha County, Winona County, Minnesota. It was in force for 42 min.

The area

The counties it named.

The facts

Issued: Jul 11, 1987, 5:48 PM CDT (22:48 UTC)
Expired: Jul 11, 1987, 6:30 PM CDT
In force: 42 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.

The nearest sounding before it

Minneapolis, MN (KSTC), launched 12:00Z, 10.8 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-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: 2637 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 112248
SVRRST
MNC157-169-112330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
548 PM CDT SAT JUL 11 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 630 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTHEAST MINNESOTA...EASTERN WABASHA AND NORTHERN WINONA

AT 540 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM NEAR
PLAINVIEW MN 25 MILES NORTHEAST OF ROCHESTER MOVING EAST AT 25
MPH.

CIITES INCLUDED IN THE WARNING ARE PLAINVIEW WABASHA AND
MINNESOTA CITY.

REMEMBER SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60
MPH..DESTRUCTIVE HAIL..DEADLY LIGHTNING AND VERY HEAVY RAIN. ALSO
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH
LITTLE OR NO ADVANCE WARNING..SO BE ON THE LOOKOUT AND BE PREPARED
TO MOVE TO A PLACE OF SAFETY IF ONE IS SPOTTED.

BUSS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 10:00 PM CDT	Severe Thunderstorm Warning	MPX	Todd	60 min
Jul 10, 10:20 PM CDT	Tornado Warning	MPX	Todd	25 min
Jul 11, 12:16 AM CDT	Severe Thunderstorm Warning	MPX	Carver, Scott, Sibley	44 min
Jul 11, 3:20 AM CDT	Severe Thunderstorm Warning	MPX	Lac qui Parle, Yellow Medicine	60 min
Jul 11, 4:20 AM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	60 min
Jul 11, 5:50 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	60 min
Jul 11, 6:15 AM CDT	Severe Thunderstorm Warning	MPX	Meeker	60 min
Jul 11, 6:45 AM CDT	Severe Thunderstorm Warning	MPX	Wright	45 min
Jul 11, 7:11 AM CDT	Severe Thunderstorm Warning	MPX	Watonwan	49 min
Jul 11, 7:19 AM CDT	Severe Thunderstorm Warning	MPX	Hennepin, Sherburne	21 min
Jul 11, 7:19 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti	56 min
Jul 11, 7:42 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth	48 min
Jul 11, 7:52 AM CDT	Severe Thunderstorm Warning	MPX	Washington	28 min
Jul 11, 7:52 AM CDT	Severe Thunderstorm Warning	MPX	Chisago	38 min
Jul 11, 4:47 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	53 min
Jul 11, 4:47 PM CDT	Severe Thunderstorm Warning	MPX	Martin	53 min
Jul 11, 5:31 PM CDT	Severe Thunderstorm Warning	MPX	Dodge, Freeborn, Steele	44 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1987 Every 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; the sounding from the Mesonet's radiosonde archive.