Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 88, NWS Duluth, MN

August 11, 20024 counties in Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Aug 11, 2002, 9:26 PM CDT for 4 counties in Minnesota. It was in force for 79 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 11, 2002, 9:26 PM CDT (02:26 UTC)
Expired: Aug 11, 2002, 10:45 PM CDT
In force: 79 min
Issued by: NWS Duluth, MN
Area: Counties, with a storm outline in the text

Counties Aitkin County, MN, Cass County, MN, Crow Wing County, MN, Itasca County, MN

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 11, 6:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 2.4 hours before the alert went out and 192 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: 204 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 1684 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

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.

NWS Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 11, 2:28 PM CDT, 6 hours 58 minutes earlier.

Area forecast discussion, Aug 11, 2:28 PM CDT, 6 hours 58 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
228 PM CDT SUN AUG 11 2002

FORECAST FOCUS IS ON THUNDERSTORM DEVELOPMENT TONIGHT INTO MONDAY.

MODELS IN GOOD AGREEMENT WITH TIMING OF FRONT TONIGHT...AND THE ETA
WAS USED FOR MOST OF DETAILS.

LINE OF THUNDERSTORMS DEVELOPED THIS AFTERNOON FROM LEADER TO
BRAINERD TO PINE CITY. THIS IN AREA OF SURFACE MOISTURE FLUX
CONVERGENCE NORTH OF WARM FRONT. SOME OF THESE QUITE STRONG...
PARTICULARLY IN PINE COUNTY WHERE WE WARNED. MORE STORMS EXPECTED
ALONG COLD FRONT IN THE DAKOTAS WHERE A SEVERE THUNDERSTORM WATCH HAS
BEEN ISSUED. AIRMASS VERY UNSTABLE THIS AFTERNOON AND WILL EXTEND
INTO TONIGHT. LAPS SOUNDING NEAR BRD SHOWS LI/S DOWN TO -8 WITH CAPE
2561 J/KG AT 18Z. 18Z SURFACED CAPE FROM SPC SHOWS SIMILAR VALUES.
SURFACE LOW WILL MOVE INTO SOUTHEAST NORTH DAKOTA THIS EVENING...AND
LOW LEVEL FLOW IS BACKED TO SOUTHEAST TOWARD BRD/XVG/PWC AND WILL
ENHANCE LOW LEVEL CONVERGENCE. ADDITIONAL SUPPORT FOR STORMS TONIGHT
WILL BE THE 850MB 40KT WIND MAX FROM SOUTHWEST MN TO KDLH BY 06Z.
WARM AIR ADVECTION...SURFACE COLD FRONT AND UPPER WAVE TO COMBINE
WITH LIFTED INDICES AT 850MB -4 TO -5C TO PRODUCE THUNDERSTORMS
TONIGHT.

SURFACE FRONT MOVES INTO EASTERN MN MONDAY MORNING...AND
SHOWERS/STORMS WILL BE LIKELY AHEAD OF IT...ESPECIALLY IN NORTHWEST
WI ZONES.

COOLER AIR MOVES IN BEHIND FRONT FOR TUESDAY. WENT CLOSER TO WARMER
FWC/ETAROS NUMBERS FOR MONDAY AS THE THE MAV IS BRINGING THE COOL
AIR TOO QUICKLY.

.DLH...NONE.

MELDE

In the hours before

Local storm report, Aug 11, 5:04 PM CDT, 4 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
504 PM CDT SUN AUG 11 2002

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0420 PM    SHELL LAKE                WI   1.00 IN HAIL
08/11/02   WASHBURN                       REPORTED BY SPOTTER

0500 PM    2E BROOK PARK             MN   1.75 IN HAIL
08/11/02   PINE                           REPORTED BY SPOTTER

Local storm report, Aug 11, 6:11 PM CDT, 3 hours 15 minutes before

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Special weather statement, Aug 11, 6:36 PM CDT, 2 hours 50 minutes before

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Local storm report, Aug 11, 6:40 PM CDT, 2 hours 46 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Nearby

Severe Thunderstorm Warnings in Minnesota, 2002 Every severe thunderstorm warning in 2002

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.