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June 20th, 2021 Severe Weather Event


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Shear rapidly increase either side of the MS River now (even more since the DVN sounding below). May be looking at overnight QLCS tornadoes, but there are some supercells developing ahead of the front in the strong WAA regime, too. Could be some training across N IL into the overnight. 18Z NAM (low res) and some of the older CAMs hinted at that this evening. 1762609456_ScreenShot2021-06-20at7_58_10PM.thumb.png.15ef5464783b2e191fe79a3d8f3f717c.png

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tornado reported at Bernard and/or Zwingle

Quote

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
NORTHWESTERN JACKSON AND SOUTH CENTRAL DUBUQUE COUNTIES...
    
At 822 PM CDT, a confirmed tornado was located over Zwingle, or 15
miles south of Dubuque, moving east at 30 mph.

 

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BULLETIN - EAS ACTIVATION REQUESTED  
TORNADO WARNING  
NATIONAL WEATHER SERVICE QUAD CITIES IA/IL  
827 PM CDT SUN JUN 20 2021  
  
THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A  
  
* TORNADO WARNING FOR...  
  NORTH CENTRAL JACKSON COUNTY IN EAST CENTRAL IOWA...  
  
* UNTIL 900 PM CDT.  
  
* AT 827 PM CDT, A CONFIRMED TORNADO WAS LOCATED OVER LA MOTTE, OR 12  
  MILES SOUTHWEST OF GALENA, MOVING EAST AT 35 MPH.  
  
  HAZARD...DAMAGING TORNADO.  
  
  SOURCE...EMERGENCY MANAGEMENT CONFIRMED TORNADO.  
  
  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT   
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED.   
           DAMAGE TO ROOFS, WINDOWS, AND VEHICLES WILL OCCUR.  TREE   
           DAMAGE IS LIKELY.  
  
* THE TORNADO WILL BE NEAR...  
  BELLEVUE AROUND 845 PM CDT.    Structure and power line damage reported.

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ILX

 

UPDATE...
Issued at 803 PM CDT Sun Jun 20 2021

Thunderstorms continue to increase in coverage along and ahead of
an advancing cold front in IA/MO this evening. While a special 19Z
KILX raob was overall unimpressive, the latest 00Z sounding shows
MLCIN decreasing to 54 J/kg while instability has increased, now
measuring over 2000 J/kg MLCAPE. Veered 0-3 km wind profile and
deep layer shear to around 40 kt will support organized storms
and a severe threat into portions of west central and central
Illinois this evening. Do anticipate some downward trend in storm
intensity starting around midnight as storms cross the I-55
corridor as we lose daytime heating and diurnal instability wanes.
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BULLETIN - EAS ACTIVATION REQUESTED  
TORNADO WARNING  
NATIONAL WEATHER SERVICE NORTHERN INDIANA  
957 PM EDT SUN JUN 20 2021  
  
THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A  
  
* TORNADO WARNING FOR...  
  NORTHEASTERN BRANCH COUNTY IN SOUTHWESTERN MICHIGAN...  
  NORTHWESTERN HILLSDALE COUNTY IN SOUTHEASTERN MICHIGAN...  
  
* UNTIL 1030 PM EDT.  
  
* AT 957 PM EDT, A CONFIRMED TORNADO WAS LOCATED OVER COLDWATER,  
  MOVING EAST AT 35 MPH.  
  
  HAZARD...DAMAGING TORNADO AND QUARTER SIZE HAIL.  
  
  SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.  
  
  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT   
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED.   
           DAMAGE TO ROOFS, WINDOWS, AND VEHICLES WILL OCCUR.  TREE   
           DAMAGE IS LIKELY.  
  
* THE TORNADO WILL BE NEAR...  
  QUINCY AROUND 1010 PM EDT.  
  
THIS INCLUDES INTERSTATE 69 IN MICHIGAN BETWEEN MILE MARKERS 13 AND  
20.  
   

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2 hours ago, SchaumburgStormer said:

It’s sad when the potential for rain of any type is a top 5 warm season weather event for me 

Schaumberg, hope you're cashing in on this WAA wing of storms. Nice light show down my way at least. We lucked out a week and a half ago with that small stalled cell in Dekalb - I know sycamore has seen almost nothing in June.

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