Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 73, NWS Duluth, MN

May 30, 1998Burnett County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at May 30, 1998, 8:08 PM CDT for Burnett County, Wisconsin. It was in force for 62 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
May 30, 1998, 8:08 PM CDT (01:08 UTC)
Expired
May 30, 1998, 9:10 PM CDT
In force
62 min
Issued by
NWS Duluth, MN
Area
Whole counties

County Burnett County, WI

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 1.1 hours before the alert went out and 148 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 1998-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1397 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 1998-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 349 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1397 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
1452 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
349 m²/s²
0-3 km storm-relative helicity
357 m²/s²
Significant tornado parameter
1.1
Supercell composite
4.6

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 May 30, 2:30 PM CDT, 5 hours 38 minutes earlier.

Area forecast discussion, May 30, 2:30 PM CDT, 5 hours 38 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
230 PM CDT SAT MAY 30 1998

MAIN CHALLENGE TONIGHT IS RESOLVING PRECIPITATION ACROSS THE AREA.

ETA/NGM AND AVN ALL REASONABLY CONSISTENT IN REDEVELOPING SHOWERS
AND THUNDERSTORMS ACROSS MUCH OF OUR CWA TONIGHT. THE MAIN EVENT
SHOULD BE FURTHER SOUTH IN THE VICINITY OF THE WARM FRONT IN
SOUTHERN MINNESOTA...BUT AS SPC JUST INDICATED IN A MESOSCALE
DISCUSSION...THERE IS INCREASING POTENTIAL FOR ELEVATED SEVERE
THUNDERSTORMS WITH SEVERE HAIL FROM CENTRAL MINNESOTA INTO NORTHERN
WISCONSIN INTO THIS EVENING. STORMS HAVE INTENSIFIED CONSIDERABLY
WITHIN THE LAST HALF HOUR FROM PARK RAPIDS INTO NW WI.

ETA SEEMS TO HAVE THE BEST HANDLE ON FEATURES AND BASICALLY FAVOR
THAT MODEL FOR TONIGHT. STRENGTHENING JET MOVING ACROSS NORTHWEST
ONTARIO...AND JET SEGMENT APPROACHING THE UPPER MIDWEST WILL COMBINE
TO GENERATE STRONG UPWARD VERTICAL MOTION ACROSS CNTRL/EC MINNESOTA
INTO NORTHERN WISCONSIN THROUGH MIDNIGHT OR SHORTLY AFTER. ETA ALSO
SHOWS  QUITE A BIT OF DIVERGENCE ACROSS THIS AREA THROUGH THIS
EVENING...AND SOME LOW LEVEL THETA-E ADVECTION. WITH PRECIPITABLE
WATER OF 1.30 INCHES...COULD BE SOME HEAVY RAIN TOO...WITH TRAINING
ECHOS ALREADY DROPPING BETWEEN 2 AND 3 INCHES TODAY IN OUR FURTHER
SOUTH COUNTIES IN WISCONSIN.

NEXT PROBLEM IS COLD FRONT DROPPING SOUTHWARD THROUGH SOUTH CENTRAL
CANADA. WINDS WILL CRANK UP OVERNIGHT AS CAA MAXIMIZES LATER IN THE
NIGHT. AS WINDS BECOME NORTHWEST...THEY SHOULD INCREASE TO 15 TO 25
MPH AS THE NIGHT WEARS ON.

FOR TONIGHT...WOULD RECOMMEND OCCASIONAL SHOWERS AND THUNDERSTORMS
FROM THE IRON RANGE SOUTHWARD...WITH SCATTERED POPS FURTHER NORTH.
ALSO NEED TO KEEP THE POSSIBLY SEVERE WORDING WITH LARGE HAIL AND
DAMAGING WINDS STILL A THREAT THIS EVENING. RAIN SHOULD END LATER IN
THE NIGHT...BUT IT WILL REMAIN MOSTLY CLOUDY. LOWS SHOULD RANGE FROM
THE LOWER 40S NORTH TO THE LOWER 50S FURTHER SOUTH INTO NW WI.

DAP

In the hours before

Local storm report, May 30, 4:52 PM CDT, 3 hours 16 minutes before
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Local storm report, May 30, 4:52 PM CDT, 3 hours 16 minutes before
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Local storm report, May 30, 4:53 PM CDT, 3 hours 15 minutes before
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Local storm report, May 30, 4:53 PM CDT, 3 hours 15 minutes before
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Local storm report, May 30, 5:25 PM CDT, 2 hours 43 minutes before
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Local storm report, May 30, 5:25 PM CDT, 2 hours 43 minutes before
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Nearby

Severe Thunderstorm Warnings in Wisconsin, 1998Every severe thunderstorm warning in 1998

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.