Tuesday, July 19, 2011

StormTrack: July 19: Minneapolis Severe Thunderstorm

VIL

Composite Reflectivity
There is a severe thunderstorm moving into Minneapolis and St. Paul at this time. Below is the severe thunderstorm warning.


...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR RAMSEY...
NORTHEASTERN HENNEPIN AND ANOKA COUNTIES UNTIL NOON CDT...

AT 1059 AM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DESTRUCTIVE
WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR COON
RAPIDS...OR 14 MILES NORTHEAST OF PLYMOUTH...MOVING SOUTHEAST AT 30
MPH.

LOCATIONS IMPACTED INCLUDE...
  MINNEAPOLIS...ST PAUL...BROOKLYN PARK...BLAINE...SPRING LAKE
  PARK...BROOKLYN CENTER...LEXINGTON...CRYSTAL...FRIDLEY...CIRCLE
  PINES...MOUNDS VIEW...LINO LAKES...ROBBINSDALE...CENTERVILLE AND
  HILLTOP.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. IF YOU ARE IN THE PATH OF THIS
STORM...PREPARE IMMEDIATELY FOR DESTRUCTIVE WINDS...WHICH CAN UPROOT
TREES...DOWN POWER LINES...AND CAUSE DAMAGE TO ROOFS AND WINDOWS.
EVACUATE MOBILE HOMES AS THEY MAY BE OVERTURNED. LARGE HAIL IS ALSO
EXPECTED...WHICH CAN CAUSE DAMAGE TO VEHICLES AND WINDOWS. SEEK
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

Looking at the images at the top of the page, VIL's (parameter indicating hail) are very high in the region specified, indicating very large hail may be occurring.

Below is an image depicting maximum hail sizes could reach 2 inches.

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