Alert archive / Wisconsin / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 71, NWS Duluth, MN

May 18, 1998Burnett County, Washburn County, Wisconsin

NWS Duluth, MN issued this severe thunderstorm warning at May 18, 1998, 10:14 PM CDT for Burnett County, Washburn County, Wisconsin. It was in force for 51 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 18, 1998, 10:14 PM CDT (03:14 UTC)
Expired: May 18, 1998, 11:05 PM CDT
In force: 51 min
Issued by: NWS Duluth, MN
Area: Whole counties

Counties Burnett County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 107 km from the middle of the area, began a volume at 03:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 3.2 hours before the alert went out and 165 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: 3617 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 1794 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 18, 1:30 PM CDT, 8 hours 44 minutes earlier.

Area forecast discussion, May 18, 1:30 PM CDT, 8 hours 44 minutes before

AREA FORECST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
130 PM CDT MON MAY 18 1998

MAIN FOCUS FOR TNGT IS THUNDERSTORM CHC.

COLD FRONT CURRENTLY IN WESTERN MINNESOTA AND PRETTY MUCH ON TRACK
WITH ETA. NO THUNDERSTORMS HAVE DEVELOPED YET ALONG FRONT...HOWEVER
WITH AIRMASS VERY UNSTABLE AHEAD OF FRONT...AM STILL EXPECTING SCT
DEVELOPMENT MAINLY ALONG FRONT. NO REAL UPPER AIR DYNAMICS UNTIL
WELL AFT FROPA...BUT HOPEFULLY THE LOW LVL MOISTURE AND UNSTABLE
CONDITIONS WILL MAKE UP FOR THAT.

FRONT MOVES OUT OF MOST OF NE MN BY LATE EVENING...AND INTO NW WI
EARLY THIS EVENING THEN OUT OF MOST OF NW WI BY 2AM. THETA-E RIDGE NOSES
UP TO DLH BY 00Z AND THEN MOVES EAST OF CWA AROUND MIDNIGHT. WOULD
IMAGINE THAT MOST OF ACTION IN CWA WILL THEN BE OVER AROUND OR
WITHIN A COUPLE HOURS OF MIDNIGHT.

SO FOR NOW...WILL GO WITH A 30/40 PERCENT CHC OF SHOWERS AND
THUNDERSTORMS FOR NE MN THIS EVENING...EARLY EVENING FOR PLACES SUCH
AS INL AND BRD...AND THROUGH MIDNIGHT FOR NW WI. DRY AIR BEHIND
FRONT BUT SOME PVA AS WELL...SO WILL GO PARTLY CLOUDY AFTER FROPA.

NGM A LITTLE COOLER THAN TNGT THAN ETA. TAKING INTO ACCOUNT EXPECTED
DEW POINTS AND A LIITLE BIT OF WIND...WILL LEAN MORE TOWARD ETA. SO
GENERALLY MID TO UPPER 50S FROM EC MN TO NW WI...AND 50 TO 55 ACROSS
REST OF NE MN.

TAP

In the hours before

Local storm report, May 18, 6:39 PM CDT, 3 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  DULUTH MN
639 PM CDT MON MAY 18 1998

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

0520 PM    13 E NORTHOME             MN   1.75 INCH HAIL
05/18/98   KOOCHICHING

0555 PM    1 E WIRT                  MN   WIND DAMAGE
05/18/98   ITASCA                         6 TO 8 INCH TREES

0520 PM    13 E NORTHOME             MN   1.75 INCH HAIL
05/18/98   KOOCHICHING

0555 PM    1 E WIRT                  MN   WIND DAMAGE
05/18/98   ITASCA                         6 TO 8 INCH TREES DOWN

TAP

Local storm report, May 18, 6:39 PM CDT, 3 hours 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  DULUTH MN
639 PM CDT MON MAY 18 1998

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

0520 PM    13 E NORTHOME             MN   1.75 INCH HAIL
05/18/98   KOOCHICHING

0555 PM    1 E WIRT                  MN   WIND DAMAGE
05/18/98   ITASCA                         6 TO 8 INCH TREES

0520 PM    13 E NORTHOME             MN   1.75 INCH HAIL
05/18/98   KOOCHICHING

0555 PM    1 E WIRT                  MN   WIND DAMAGE
05/18/98   ITASCA                         6 TO 8 INCH TREES DOWN

TAP

Local storm report, May 18, 6:40 PM CDT, 3 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  DULUTH MN
640 PM CDT MON MAY 18 1998

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

0520 PM    13 E NORTHOME             MN   1.75 INCH HAIL
05/18/98   KOOCHICHING

0555 PM    1 E WIRT                  MN   WIND DAMAGE
05/18/98   ITASCA                         6 TO 8 INCH TREES DOWN

TAP

Local storm report, May 18, 6:40 PM CDT, 3 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE  DULUTH MN
640 PM CDT MON MAY 18 1998

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

0520 PM    13 E NORTHOME             MN   1.75 INCH HAIL
05/18/98   KOOCHICHING

0555 PM    1 E WIRT                  MN   WIND DAMAGE
05/18/98   ITASCA                         6 TO 8 INCH TREES DOWN

TAP

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 7:10 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching, Saint Louis	60 min
May 18, 7:36 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	64 min
May 18, 8:17 PM CDT	Severe Thunderstorm Warning	DLH	Itasca	63 min
May 18, 8:27 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin, Cass	63 min
May 18, 8:44 PM CDT	Tornado Warning	DLH	Itasca	51 min
May 18, 8:51 PM CDT	Severe Thunderstorm Warning	DLH	Itasca	64 min
May 18, 9:30 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	60 min
May 18, 9:35 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	60 min
May 18, 9:44 PM CDT	Severe Thunderstorm Warning	DLH	Cass, Itasca	61 min
May 18, 10:00 PM CDT	Severe Thunderstorm Warning	DLH	Koochiching	60 min
May 18, 10:05 PM CDT	Severe Thunderstorm Warning	DLH	Aitkin	65 min
May 18, 10:33 PM CDT	Severe Thunderstorm Warning	DLH	Saint Louis	62 min
May 18, 10:42 PM CDT	Tornado Warning	DLH	Itasca	48 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 1998 Every 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; radar from the NEXRAD Level II archive.