Severe Thunderstorm Warning 21, NWS Duluth, MN

Issued

Jun 6, 1999, 3:36 PM CDT (20:36 UTC)

Expired

Jun 6, 1999, 4:30 PM CDT

In force

54 min

Issued by

NWS Duluth, MN

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Cass County, MN

The Duluth radar (KDLH), 176 km from the middle of the area, began a volume at 20:38 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.

907 
WUUS1 KDLH 062039 RRA
SVRDLH
MNC021-062130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DULUTH MN
336 PM CDT SUN JUN 6 1999

THE NATIONAL WEATHER SERVICE IN DULUTH MN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN CASS COUNTY IN MINNESOTA

* UNTIL 430 PM CDT

* AT 330 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER HACKENSACK...OR ABOUT 41 MILES NORTH OF   
  BRAINERD...MOVING NORTH AT 45 MPH. DIME SIZE HAIL WAS 
  REPORTED IN HACKENSACK.

* THE SEVERE THUNDERSTORM WILL BE...
  4 MILES EAST OF WALKER...6 MILES WEST OF WHIPHOLT AT 345 PM CDT
  OVER SCHLEY...7 MILES EAST OF CASS LAKE AT 410 PM CDT

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY
LIGHTNING ARE ALL POSSIBLE WITH SEVERE THUNDERSTORMS. STAY INSIDE
AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. SEVERE 
THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE 
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE 
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

 
LAT...LON 4690 9465 4688 9439 4741 9421 4742 9461

SCW

NWS Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 6, 3:27 PM CDT, 9 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DULUTH MN
327 PM CDT SUN JUN 6 1999

FORECAST FOCUS IS IN SHORT TERM AND IS SEVERE WEATHER.

LINE OF THUNDERSTORMS FIRED ALONG DRY LINE IN WESTERN MINNESOTA AS
IT MOVED INTO MORE UNSTABLE AIR WITH DEWPOINTS IN THE MIDDLE AND
UPPER 60S. GOOD SHEAR EXISTS ACROSS CWA AS NOTED BY SPC WITH 75KTS
FLOW AT 500MB AT MPX THIS MORNING. BETTER SHEAR FURTHER NORTH IN
VICINITY OF WARM FRONT WHICH LIES ACROSS FAR NORTHERN MINNESOTA AND
NUMEROUS WARNINGS ISSUED IN NORTHERN NORTH DAKOTA AND MINNESOTA.
STORMS WILL CONTINUE TO FIRE AND MOVE NORTHEAST...BUT MOVE MORE EAST
AS A LINE. AIRMASS WILL REMAIN VERY UNSTABLE AND MSAS SHOWS SURFACE
LIFTED INDICES OF -13 IN SOUTHERN WISCONSIN CWA AND -9 NORTH CENTRAL
MINNESOTA.

STORMS ALSO DEVELOPED IN IOWA AND SOUTHWEST WISCONSIN IN AREA OF
DIVERGENCE OF 300 MB JET. JET MOVES NORTH THROUGH WESTERN WISCONSIN
THIS EVENING AND AREA OF DIVERGENCE PULLS THROUGH AS WELL. STORMS
SHOULD CONTINUE TO SURGE NORTH WITH 850MB THETA-E RIDGE MOVING INTO
EASTERN WISCONSIN BY EARLY MORNING. HEAVY RAIN WORDING IN FORECAST
FOR NORTHWEST WISCONSIN STILL LOOKS GOOD THIS EVENING.

UPPER LOW ALONG NORTH DAKOTA/SOUTH DAKOTA BORDER SHOULD LIFT
NORTHEAST AS MORNING ANALYSIS SHOWED 70-90M HEIGHT FALLS NORTHEAST OF
LOW. HOWEVER...RUC AND SATELLITE IMAGERY SHOW A BIT MORE EASTERLY
MOVEMENT THIS AFTERNOON. EXPECT THUNDERSTORMS THIS EVENING IN WESTERN
AND SOUTHWEST ZONES...THEN A BRIEF BREAK OCCURS BEFORE
INFLUENCE OF UPPER LOW MOVES IN. ELSEWHERE...SCATTERED TO NUMEROUS
THUNDERSTORMS CAN BE EXPECTED.

.DLH...NONE.

MELDE

Severe Thunderstorm Warnings in Minnesota, 1999Every severe thunderstorm warning in 1999

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.