Alert archive / Minnesota / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 120, NWS Twin Cities, MN

July 19, 1986Le Sueur County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 19, 1986, 2:51 AM CDT for Le Sueur County, Minnesota. It was in force for 54 min.

The area

The counties it named.

The facts

Issued: Jul 19, 1986, 2:51 AM CDT (07:51 UTC)
Expired: Jul 19, 1986, 3:45 AM CDT
In force: 54 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Le Sueur 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, 7.9 hours before the alert went out and 54 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: 235 J/kg
Mixed-layer CIN: -264 J/kg
Mixed-layer LCL: 1882 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 190751
SVRRST
MNC079-190845-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
251 AM CDT SAT JUL 19 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 345 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

SOUTH CENTRAL MINNESOTA...LESUEUR

THIS WARNING INCLUDES THE CITY OF LE CENTER.

AT 240 AM CDT THIS MORNING OF SAT JULY 19TH RADAR INDICATED A
SEVERE THUNDERSTORM 5 MILES EAST OF SAINT PETER MN..20 MILES
NORTH NORTHWEST OF MANKATO..MOVING TOWARDS THE EAST AT 40 MPH.

 A SEVERE THUNDERSTORM PRODUCES STRONG DAMAGING WINDS..LARGE HAIL
 ..VERY HEAVY RAIN AND DANGEROUS LIGHTNING.

 REMEMBER THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO
 WITH LITTLE OR NOW ADVANCE WARNING SO BE ON THE LOOKOUT.

   BARNES

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 18, 9:04 PM CDT, 5 hours 47 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MINNEAPOLIS/ST PAUL MN
900 PM CDT TUE JUL 15 1986

      ...ATTN SELS A MSP...
TIMES IN CDT

540 PM  GOLF BALL SIZE HAIL IN HUGO..NORTH WASHINGTON COUNTY.

9RICHARDSON

Special weather statement, Jul 18, 10:59 PM CDT, 3 hours 52 minutes before

RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS ST PAUL MN
1045 PM CDT FRI JUL 18 1986

AT 1030 PM...THUNDERSTORMS...WITH HEAVY TO LOCALLY INTENSE RAINFALL..
WERE DEVELOPING ACROSS PARTS OF SOUTHWEST INTO CENTRAL MINNESOTA.  ONE
BAND OF THESE THUNDERSTORMS EXTENDED FROM THE SOUTH DAKOTA BORDER...
BETWEEN ORTONVILLE AND CANBY...TO NORTH OF WILLMAR/ABOUT 40 MILES WEST
OF ST CLOUD.

ANOTHER CLUSTER OF THESE THUNDERSTORMS WAS ABOUT 30 MILES NORTH OF
ALEXANDRIA...IN THE VICINITY OF WADENA.

IN WEST CENTRAL WISCONSIN...A THUNDERSTORM WITH VERY HEAVY RAINS WAS
NORTHEAST OF LA CROSSE...IN THE VICINITY OF BLACK RIVER FALLS.

HAIL...GUSTY WINDS AND DANGEROUS LIGHTNING STRIKES ARE ALSO POSSI~BLE
WITH THESE THUNDERSTORMS.

MOVEMENT WAS TO THE EAST AT 35 MILES AN HOUR.
<
OTHERWISE...SHOWERS AND OCCASIONAL THUNDERSTORMS WERE SCATTERED ACROSS
CENTRAL INTO NORTHERN MINNESOTA...AND OVER WEST CENTRAL WISCONSIN.

DOM

Special weather statement, Jul 18, 11:56 PM CDT, 2 hours 55 minutes before

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MINNEAPOLIS ST PAUL MN
1145 PM CDT FRI JUL 18 1986

AT 1130 PM...THUNDERSTORMS...WITH HEAVY TO LOCALLY INTENSE RAINFALL..
CONTINUED TO DEVELOP ACROSS PARTS OF SOUTHWEST INTO CENTRAL MINNESOTA.
HAIL...STRONG GUSTY WINDS AND DANGEROUS LIGHTNING STRIKES ARE POSSIBLE
WITH THESE THUNDERSTORMS.

ONE BAND OF THESE THUNDERSTORMS EXTENDED FROM THE SOUTH DAKOTA BORDER...
NEAR CANBY...TO WILLMAR...TO JUST NORTHWEST OF ST CLOUD.

ANOTHER AREA REACHED FROM AROUND BRAINERD ACROSS MILLE LACS LAKE TO JUST
EAST OF THE LAKE.

IN WEST CENTRAL WISCONSIN...A THUNDERSTORM WITH VERY HEAVY RAINS WAS
NORTHEAST OF LA CROSSE...JUST EAST OF BLACK RIVER FALLS.

MOVEMENT WAS TO THE EAST AT 35 MILES AN HOUR.

OTHERWISE...MOSTLY GARDEN VARIETY SHOWERS AND THUNDERSTORMS WERE
SCATTERED ACROSS PARTS OF NORTH AND CENTRAL MINNESOTA...AND...NORTH TO
SOUTH ACROSS WEST WISCONSIN FROM NEAR ASHLAND' THRU EAU CLAIRE TO NEAR
LA CROSSE.
DOM

Special weather statement, Jul 19, 2:35 AM CDT, 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MINNEAPOLIS ST PAUL MN
230 PM CDT SAT JUL 19 1986

SEVERE THUNDERSTORM WATCH 395 HAS BEEN CANCELLED OVER PORTIONS OF
CENTRAL MINNESOTA.  THE COUNTIES CLEARED OF THIS WATCH INCLUDE PINE..
KANABEC..MILLE LACS..ISANTI..MORRISON..BENTON..STEARNS..SHERBURNE..
MEEKER..WRIGHT AND MCLEOD.
HARRISON
SCATTERED ACROSS PARTS OF NORTH AND CENTRAL MINNESOTA...AND...NORTH TO
SOUTH ACROSS WEST WISCONSIN FROM sNEAR ASHLAND THRU EAU CLAIRE TO NEAR
LA CROSSE.
DOM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:06 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	54 min
Jul 19, 12:42 AM CDT	Severe Thunderstorm Warning	MPX	Benton, Mille Lacs, Sherburne	48 min
Jul 19, 12:42 AM CDT	Severe Thunderstorm Warning	MPX	Isanti	48 min
Jul 19, 12:42 AM CDT	Severe Thunderstorm Warning	MPX	Meeker, Wright	48 min
Jul 19, 1:15 AM CDT	Severe Thunderstorm Warning	MPX	Carver, Hennepin	60 min
Jul 19, 1:15 AM CDT	Severe Thunderstorm Warning	MPX	Anoka, Isanti	60 min
Jul 19, 1:32 AM CDT	Severe Thunderstorm Warning	MPX	Washington	58 min
Jul 19, 1:32 AM CDT	Severe Thunderstorm Warning	MPX	Chisago	58 min
Jul 19, 1:32 AM CDT	Severe Thunderstorm Warning	MPX	Ramsey	58 min
Jul 19, 2:09 AM CDT	Severe Thunderstorm Warning	MPX	Brown, Nicollet	51 min
Jul 19, 5:43 AM CDT	Severe Thunderstorm Warning	MPX	Fillmore, Houston, Winona	47 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.