Alert archive / Minnesota / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 123, NWS Twin Cities, MN

September 7, 1990Martin County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 7, 1990, 3:36 PM CDT for Martin County, Minnesota. It was in force for 39 min.

The area

The counties it named.

The facts

Issued: Sep 7, 1990, 3:36 PM CDT (20:36 UTC)
Expired: Sep 7, 1990, 4:15 PM CDT
In force: 39 min
Issued by: NWS Twin Cities, MN
Area: Whole counties

County Martin 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, 8.6 hours before the alert went out and 151 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1258 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 228 m²/s²
0-3 km storm-relative helicity: 383 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KRST 072038
SVRRST
MNC091-072115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCHESTER MN
336 PM CDT FRI SEP 7 1990
 
THE NATIONAL WEATHER SERVICE IN ROCHESTER HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  415 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH CENTRAL MINNESOTA
          ...MARTIN
 
AT 3:30 PM WEATHER RADAR INDICATES A SEVERE THUNDERSTORM ABOUT 10
MILES NORTHWEST OF FAIRMOUNT MOVING SOUTHEAST AND WILL BE APPROACHING
THE CITY OF FAIRMOUNT AT APPROXIMATELY 3:45 PM.
 
 
 
 
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

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, Sep 7, 12:28 PM CDT, 3 hours 8 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD MN
1225 PM CDT FRI SEP 7 1990

REPORT FOR SEP 7 1990
ALL TIMES CDT

TIME     EVENT
412 AM   DAMAGING WINDS AND SHEETS OF HALF INCH TO THREE QUARTER INCH
         HAIL AT BENSON MINNESOTA 72 MILES WEST-SOUTHWEST OF ST CLOUD
         IN SWIFT COUNTY. WIND ESTIMATED AT 50 TO 60 MPH.
 14 AM   74 MPH WIND AND HALF INCH SIZE HAIL AT ALEXANDRIA MINNESOTA
         ...60 MILES NORTHWEST OF ST CLOUD IN DOUGLAS COUNTY.
455 AM   2 INCH HAIL FELL AT WILLMAR MINNESOTA...52 MILES SOUTHWEST
         OF ST CLOUD IN KANDIYOHI MINNESOTA. NUMEROUS REPORTS OF
         BROKEN WINDOWS AND TREES STRIPPED OF THEIR LEAVES.
458 AM   WIND DAMAGE AT SAUK CENTRE MINNESOTA...38 MILES WEST OF
         ST CLOUD IN STEARNS COUNTY. TREE BLOWN OVER ONTO CAR AND
         LARGE TREE LIMBS SNAPPED OFF.
520 AM   WIND DAMAGE AT LITCHFIELD MINNESOTA...35 MILES SOUTHWEST OF
         ST CLOUD IN MEEKER COUNTY. POWER LINES ADOWN EXTENSIVE POWER
         OUTAGES AT GROVE CITY...LITCHFIELD AND DARWIN IN MEEKER
         COUNTY.
VC

Local storm report, Sep 7, 12:44 PM CDT, 2 hours 52 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST CLOUD MN
1240 PM CDT FRI SEP 7 1990

REPORT FOR SEP 7 1990
ALL TIMES CDT

TIME     EVENT
412 AM   DAMAGING WINDS AND SHEETS OF HALF INCH TO THREE QUARTER INCH
         HAIL AT BENSON MINNESOTA 72 MILES WEST-SOUTHWEST OF ST CLOUD
         IN SWIFT COUNTY. WIND ESTIMATED AT 50 TO 60 MPH.
414 AM   74 MPH WIND AND HALF INCH SIZE HAIL AT ALEXANDRIA MINNESOTA
         ...60 MILES NORTHWEST OF ST CLOUD	 IN DOUGLAS COUNTY.
455 AM   2 INCH HAIL FELL AT WILLMAR MINNESOTA...52 MILES SOUTHWEST
         OF ST CLOUD IN KANDIYOHI MINNESOTA. NUMEROUS REPORTS OF
         BROKEN WINDOWS AND TREES STRIPPED OF THEIR LEAVES.
458 AM   WIND DAMAGE AT SAUK CENT

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 3:52 AM CDT	Severe Thunderstorm Warning	MPX	Pope, Swift	43 min
Sep 7, 4:15 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi	45 min
Sep 7, 4:53 AM CDT	Severe Thunderstorm Warning	MPX	Stearns	67 min
Sep 7, 5:05 AM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Meeker	55 min
Sep 7, 6:14 AM CDT	Severe Thunderstorm Warning	MPX	Sibley	31 min
Sep 7, 6:32 AM CDT	Severe Thunderstorm Warning	MPX	Le Sueur, Nicollet	28 min
Sep 7, 7:23 AM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Waseca	37 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1990 Every 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.