Tuesday, June 21, 2011

June 21: Tornado Warning (Brief Rain Wrapped Tornadoes)- Coming towards Downtown Chicago, IL



...A TORNADO WARNING REMAINS IN EFFECT FOR WEST CENTRAL COOK...
DUPAGE...EAST CENTRAL DE KALB...NORTHEASTERN GRUNDY...NORTHWESTERN
WILL...KENDALL AND KANE COUNTIES UNTIL 900 PM CDT...

AT 824 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE SQUALL LINE CAPABLE OF PRODUCING DAMAGING STRAIGHT LINE WINDS
AND BRIEF RAIN-WRAPPED TORNADOES.  THESE DANGEROUS STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 5 MILES SOUTHWEST OF GILBERTS TO
DUPAGE AIRPORT TO NAPERVILLE TO ROCKDALE...MOVING NORTHEAST AT 45
MPH.

THESE DANGEROUS STORMS WILL BE NEAR...
  WOODRIDGE...WHEATON...STREAMWOOD AND LEMONT AROUND 835 PM CDT.
  YORK CENTER...WESTMONT...ROSELLE AND MEDINAH AROUND 840 PM CDT.
  VILLA PARK AND OAK BROOK AROUND 845 PM CDT.

OTHER LOCATIONS IMPACTED BY THIS LINE OF TORNADO PRODUCING STORMS
INCLUDE GLENDALE HEIGHTS...GLENBARD SOUTH...WILLOWBROOK...
BLOOMINGDALE AND OAKBROOK TERRACE.

Notice

The Weather Centre is under a tornado warning and will have to go offline around 8:45 pm.
Please stay careful.

June 21: Tornado Warning- Flanagan, IL


...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN LIVINGSTON
AND SOUTHEASTERN LA SALLE COUNTIES UNTIL 800 PM CDT...

AT 734 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 8 MILES NORTH OF FLANAGAN...OR 10 MILES SOUTHWEST
OF STREATOR...MOVING NORTHEAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
  STREATOR...CORNELL...KANGLEY AND RANSOM.

June 21- Dangerous Storms (7:20 pm CDT)

Storms continue to move northward into North Illinois.

These storms are becoming dangerous.

-Peru, Illinois has reported wind gusts at 75 MPH.
-Naperville, Illinois: Trained Spotter reported a funnel cloud.
-Georgetown, Illinois reported damage with several trees blown down from strong winds.
-Latham, Illinois reports power out and power lines down.

People in  North Illinois should take cover now.

June 21: Tornado Warning (Tornado Reported by Law Enforcement)- Hopkins, MI


THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A  
  
* TORNADO WARNING FOR...  
  NORTH CENTRAL ALLEGAN COUNTY IN SOUTHWEST MICHIGAN...  
  
* UNTIL 700 PM EDT  
  
* AT 625 PM EDT...LOCAL LAW ENFORCEMENT REPORTED A TORNADO NEAR THE    
  HOPKINS AREA. DOPPLER RADAR SHOWED THIS TORNADO MOVING NORTHEAST  
  AT 30 MPH.  
  
THE WARNING INCLUDES AREAS SURROUNDING THESE LOCATIONS...  
  MOLINE...             BURNIPS...            HOPKINS...  
  DORR...               DIAMOND SPRINGS...    MONTEREY...  
  
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
  
TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN  
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID  
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE  
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING OBJECTS.

June 21- Evening Storm Update (5:28 pm CDT)

This is a storm update for the storms currently occurring in South Illinois.

Up in North Illinois, there is a very unstable atmosphere as the warm front has lifted to the north of the area. As a strong low pressure pushes eastward, storms moving north out ahead of the cold front may go linear into a squall line should the cold front push farther and quicker than the mesoscale convective system (MCS) currently in South Illinois.

These storms in Illinois aren't too strong in terms of large hail, but are likely putting down hail in a smaller size at this time. As the storms move northward and probably in a slightly eastward direction as well, the storms will strengthen in the warm and humid atmosphere sector created by the warm front pulled north.
There is potential for these storms to also go into Indiana, which seems to be the more likely solution. The low is actually progged to pull northeastward. As this motion happens, the cold front may retract in an upward fashion, bending towards North Illinois. Should this happen, the storms will be more inclined to push more easterly into Indiana, and I believe this is what solution I may go with as we move on into the night.

June 21: Tornado Warning (Brief Rain Wrapped Tornadoes)- St. James, IL


THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
  NORTHEASTERN MARION COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 530 PM CDT

* AT 438 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE SQUALL LINE CAPABLE OF PRODUCING BRIEF RAIN-WRAPPED
  TORNADOES IN ADDITION TO WIDESPREAD STRAIGHT LINE WIND DAMAGE. THIS
  DANGEROUS STORM WAS LOCATED NEAR KINMUNDY...OR 10 MILES NORTHEAST
  OF SALEM...AND MOVING NORTHEAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FARINA...BROWNSTOWN...ST. ELMO...WRIGHTS CORNER...ST. PETER...
  LOOGOOTEE...AVENA...ST. JAMES AND LA CLEDE.

June 21: Tornado Warning- Ripon, WI


THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A  
  
* TORNADO WARNING FOR...  
  WEST CENTRAL FOND DU LAC COUNTY IN EAST CENTRAL WISCONSIN...  
  NORTHEASTERN GREEN LAKE COUNTY IN SOUTH CENTRAL WISCONSIN...  
  
* UNTIL 415 PM CDT  
  
* AT 341 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A  
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS  
  STORM WAS LOCATED NEAR BRANDON...OR 6 MILES SOUTH OF RIPON...AND  
  MOVING NORTH AT 35 MPH.  
  
* LOCATIONS IMPACTED INCLUDE...  
  RIPON AND WEST ROSENDALE.  

June 21: Tornado Warning- Spring Lake Park, MN


THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  NORTHEASTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
  EXTREME NORTHWESTERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 345 PM CDT

* AT 312 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
  TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS NEAR SPRING LAKE
  PARK...OR OVER SPRING LAKE PARK...AND MOVING NORTH AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  SPRING LAKE PARK...
  MOUNDS VIEW...
  BLAINE...
  OAK PARK...
  COON RAPIDS...
  ANDOVER...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

June 21: Tornado Warning- Modena, WI/MN border



...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN BUFFALO AND
EXTREME EAST CENTRAL WABASHA COUNTIES UNTIL 415 PM CDT...

AT 321 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
TORNADO LOCATED NEAR TELL...OR 6 MILES NORTHEAST OF ALMA...MOVING
NORTH AT 25 MPH.

* THE TORNADO WILL BE NEAR...
  MODENA AROUND 330 PM...
  URNE AROUND 335 PM...
  MISHA MOKWA AROUND 340 PM...
  MAXVILLE AROUND 345 PM...
  THE BIG SWAMP AREA AROUND 350 PM...

June 21: Tornado Warning- Berlin, WI


THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN GREEN LAKE COUNTY IN SOUTH CENTRAL WISCONSIN...
  NORTHEASTERN MARQUETTE COUNTY IN SOUTH CENTRAL WISCONSIN...

* UNTIL 400 PM CDT

* AT 323 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR PRINCETON...OR 10 MILES SOUTHWEST OF
  BERLIN...AND MOVING NORTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BERLIN.

June 21: Tornado Warning- Green Lake, WI


...A TORNADO WARNING REMAINS IN EFFECT FOR EASTERN GREEN LAKE...
WESTERN FOND DU LAC AND NORTH CENTRAL DODGE COUNTIES UNTIL 345 PM
CDT...

AT 323 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 5 MILES SOUTHWEST OF BRANDON...OR 8 MILES NORTHWEST
OF WAUPUN...MOVING NORTH AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  RIPON...BERLIN...BRANDON...GREEN LAKE...FAIRWATER AND WEST
  ROSENDALE.

June 21: Tornado Warning- St. Paul Park, MN


THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
  NORTH CENTRAL DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 245 PM CDT

* AT 216 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
  TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS NEAR ROSEMOUNT...
  OR OVER ROSEMOUNT...AND MOVING NORTH AT 30 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  ROSEMOUNT...
  ST PAUL PARK...
  INVER GROVE HEIGHTS...
  EAGAN...
  NEWPORT...
  SUNFISH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

June 21: Mesoscale Discussion- South Half of WI, North Half of IL, East IA, Southeast MN

Begin SPC Discussion

MESOSCALE DISCUSSION 1337
   NWS STORM PREDICTION CENTER NORMAN OK
   1145 AM CDT TUE JUN 21 2011
   
   AREAS AFFECTED...SERN MN...ERN IA...MUCH OF SRN WI...CNTRL AND NRN
   IL
   
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
   
   VALID 211645Z - 211915Z
   
   A GENERAL INCREASE IN CONVECTIVE COVERAGE IS EXPECTED THIS
   AFTERNOON...AND A WATCH MAY EVENTUALLY BE NEEDED.
   
   SURFACE ANALYSIS SHOWS A LOW OVER WRN IA...WITH A BROADLY CONFLUENT
   WARM SECTOR WITH THETA-E AXIS FROM SERN MN INTO NRN IL. MORNING
   SOUNDINGS SHOWED EFFECTS OF EARLY CONVECTION WITH SOMEWHAT DRY JUST
   ABOVE THE SURFACE TO ABOUT 850 MB.
   
   AREAS OF HEATING...ALONG WITH GENERALLY CONVERGENT LOW
   LEVELS...SHOULD RESULT IN AN ARC OF CONVECTION THIS AFTERNOON.OTHER
   STORMS ARE LIKELY TO GENERATE/STRENGTHEN NEAR THE WARM FRONT. WIND
   PROFILES VEER WITH HEIGHT BUT ARE GENERALLY MARGINAL...YET
   SUFFICIENT FOR SUPERCELLS. MARGINAL HAIL WITH RELATIVELY WARM MID
   LEVELS...AND A FEW TORNADOES GIVEN SUFFICIENT LOW LEVEL SHEAR...WILL
   BE POSSIBLE. A FEW NWD MOVING BOWS MAY MATERIALIZE WITH TIME WITH
   DAMAGING WIND THREAT.
End SPC Discussion
Begin The Weather Centre Discussion

Strong low is moving into vicinity with warm front pulling into Wisconsin. Warm sector has pulled  up into the area below warm front.
Do expect scattered convection to become organized into bowing sectors and possibly clusters that may be supportive of supercell activity.