Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 131, NWS Twin Cities, MN

July 26, 1986Redwood County, Renville County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 26, 1986, 11:23 PM CDT for Redwood County, Renville County, Minnesota. It was in force for 59 min.

The area

The counties it named.

The facts

Issued: Jul 26, 1986, 11:23 PM CDT (04:23 UTC)
Expired: Jul 27, 1986, 12:22 AM CDT
In force: 59 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

Counties Redwood County, MN, Renville 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, 4.4 hours before the alert went out and 123 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: 441 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 936 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 175 m²/s²
0-3 km storm-relative helicity: 290 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 7.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMSP 270423
SVRMSP
MNC129-127-270520-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MINNEAPOLIS MN
1123 PM CDT SAT JUL 26 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1220 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

SOUTHWEST MINNESOTA...SOUTHERN RENVILLE AND NORTHERN REDWOOD

.......THIS IS A VERY SEVERE THUNDERSTORM WARNING......

AT...1115 PM CDT A SEVERE THUNDERSTORM WAS INDICATED BY RADAR 10
MILES NORTHWEST OF REDWOOD FALLS MOVING TO THE SOUTHEAST AT 15
MILES AN HOUR.
CITIES IN THE PATH OF THIS STORM ARE..REDWOOD FALLS..DELHI..
BELVIEW..AND MORTON..ALONG THE MINNESOTA RIVER.

REMEMBER SEVERE THUNDERSTORMS PRODUCE STRONG DAMAGING WINDS..LARGE
HAIL AND FREQUENT LIGHTNING STRIKES. 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.

JHM/REC

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, Jul 26, 6:04 PM CDT, 5 hours 19 minutes before

SEVERE STORM REPORT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
605 PM CDT SAT JUL 26 198

      ...ATTN SELS A MSP...

600 PM CDT...GOLF BALL HAIL IN CHIPPEWA CO. 8 MI EAST OF MONTEVIDEO.

MATHEbWS

Local storm report, Jul 26, 11:01 PM CDT, 22 minutes before

SEVERE STORM REPORT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
1100PM CDT SAT JUL 26 1986

      ...ATTN SELS A MSP...

600 PM CDT...GOLF BALL HAIL IN CHIPPEWA CO. 8 MI EAST OF MONTEVIDEO.
611 PM CDT...FUNNEL CLOUD REPORTED IN CHIPPEWA CO. 2 1/2 MILES NORTHWEST
    OF MAYNARD.
615 PM CDT...TORNADO ON GROUND IN CHIPPEWA CO. 6 MI EAST OF MONTEVIDEO.
658 PM CDT...GRAPEFRUIT SIZE HAIL IN CHIPPEWA CO. 13 MILES EAST NORTHEAST
    OF MONTEVIDEO.
800 PM CDT...MARBLE SIZE HAIL IN RENVILLE CO. BETWEEN DANUBE AND
    RENVILLE.
805 PM CDT...MARBLE SIZE HAIL IN NORTHERN RENVILLE CO.
858 PM CDT...LARGE TREE LIMBS REPORTED SEVERED AT SACRED HEART.
OSTERNDORF/LOFGREN/MATHEWS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 7:13 PM CDT	Severe Thunderstorm Warning	MPX	Renville	47 min
Jul 26, 7:47 PM CDT	Tornado Warning	MPX	Renville	43 min
Jul 26, 8:36 PM CDT	Tornado Warning	MPX	Redwood, Renville	24 min
Jul 26, 9:10 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville	50 min
Jul 26, 9:35 PM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	55 min
Jul 26, 10:06 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville	54 min
Jul 26, 10:30 PM CDT	Severe Thunderstorm Warning	MPX	Yellow Medicine	60 min
Jul 26, 11:15 PM CDT	Severe Thunderstorm Warning	MPX	Pope	60 min
Jul 27, 3:47 PM CDT	Severe Thunderstorm Warning	MPX	Dakota	38 min
Jul 27, 5:26 PM CDT	Severe Thunderstorm Warning	MPX	Fillmore, Olmsted	49 min
Jul 27, 6:56 PM CDT	Severe Thunderstorm Warning	MPX	Fillmore, Mower	34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1986 Every severe thunderstorm warning in 1986

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.