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May 8-9 Severe Weather


MnWx_88

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Still like western Iowa/far eastern Nebraska for tomorrow.  Think SPC needs to bump the western edge of their higher probs a tad to the west. 

 

Euro and GFS still worlds apart for the Sun/Mon period.  Euro still showing a setup over southern Iowa/Missouri for Sunday, and another further east over eastern Iowa/Illinois for Mon.  GFS much more progressive.

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SPC goes moderate risk for parts of IA/MN on new day 1.

 

 

DAY 1 CONVECTIVE OUTLOOK

NWS STORM PREDICTION CENTER NORMAN OK

1240 AM CDT THU MAY 08 2014

VALID 081200Z - 091200Z

...THERE IS A MDT RISK OF SVR TSTMS ACROSS SOUTHERN MN AND WRN IA...

...THERE IS A SLGT RISK OF SVR TSTMS SURROUNDING THE MDT RISK FROM

THE UPPER MS VALLEY TO SCNTRL TX...

...SUMMARY...

SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP BY MID AFTERNOON ACROSS

SOUTHERN MINNESOTA AND WESTERN IOWA. VERY LARGE HAIL AND TORNADOES

ARE EXPECTED WITH THIS ACTIVITY. SCATTERED THUNDERSTORMS...A FEW

SEVERE...SHOULD ALSO DEVELOP SOUTH OF THIS REGION ACROSS EASTERN

KANSAS AND MISSOURI...SOUTHWARD INTO THE HILL COUNTRY OF

SOUTH-CENTRAL TEXAS. LARGE HAIL IS THE PRIMARY SEVERE THREAT WITH

THIS CONVECTION.

...MINNESOTA/IOWA...

UPPER TROUGH WILL PROGRESS INTO THE HIGH PLAINS THURSDAY AFTERNOON

AS STRONG MID-LEVEL SPEED MAX...ON THE ORDER OF 75KT AT 500

MB...EJECTS ACROSS KS INTO THE MID MO RIVER VALLEY BY 08/21Z. THIS

FEATURE IS EXPECTED TO ENCOURAGE LEE LOW TO TRACK NEWD TO A POSITION

JUST SW OF SUX PRIOR TO CONVECTIVE TEMPERATURES BEING BREACHED AHEAD

OF SURGING DRYLINE.

EARLY IN THE PERIOD WARM ADVECTION IS EXPECTED TO PROVIDE UVV

NECESSARY FOR SCATTERED ELEVATED CONVECTION ALONG THE NOSE OF LLJ

ACROSS PORTIONS OF THE CNTRL PLAINS. THIS ACTIVITY SHOULD

SPREAD/DEVELOP NEWD INTO THE UPPER MS VALLEY DURING THE AFTERNOON

HOURS. OF MORE CONCERN WILL BE THE EXPECTED TSTM DEVELOPMENT SOUTH

OF THE WARM FRONT ACROSS SRN MN/WRN IA. LATEST THINKING IS A FAIRLY

WELL-DEFINED DRY SURGE WILL SPREAD ACROSS NEBRASKA INTO WRN IA AS

SFC LOW TRACKS TO NEAR THE MO RIVER. AT THIS TIME IT APPEARS

CONVECTION SHOULD BE MINIMAL ACROSS THE WARM SECTOR PRIOR TO MAX

HEATING. IMMEDIATELY AHEAD OF THE DRYLINE...TEMPERATURES SHOULD

WARM INTO THE LOWER 80S AND CONVECTION SHOULD INITIATE BETWEEN

20-21Z. WITH LOWER 60S SFC DEW POINTS FORECAST TO SPREAD INTO SRN

MN AMPLE BUOYANCY WILL EXIST FOR ROBUST SUPERCELL DEVELOPMENT. IN

FACT...FORECAST SOUNDINGS EXHIBIT SBCAPE UPWARDS OF 3000 J/KG ACROSS

NWRN IA WHERE SFC-6KM SHEAR IS EXPECTED TO BE NEAR 60KT. SUPERCELLS

SHOULD EVOLVE ACROSS THIS REGION THEN TRACK NEWD TOWARD A CORRIDOR

OF STRONGER LOW-LEVEL SHEAR ACROSS SRN MN. VERY LARGE HAIL IS

EXPECTED WITH ANY SUPERCELLS THAT FORM AND THERE IS SOME CONCERN

THAT TORNADOES MAY ALSO DEVELOP WITHIN REGION OF STRONGER LOW-LEVEL

SHEAR...ESPECIALLY NEAR THE WARM FRONT. SEVERE THREAT WILL SHIFT

INTO THE UPPER MS VALLEY DURING THE OVERNIGHT PERIOD AS MID-LEVEL

HEIGHT FALLS FOCUS ACROSS THIS AREA.

...KS/MO...SWD INTO THE HILL COUNTRY OF SCNTRL TX...

LARGE-SCALE FORCING IS EXPECTED TO DRIVE ONE OR MORE BANDS OF

CONVECTION ACROSS THE SRN PLAINS EARLY IN THE PERIOD AS MID-LEVEL

SPEED MAX EJECTS ACROSS THE TX PANHANDLE. AT 06Z THIS MORNING THIS

APPEARS TO BE UNDERWAY AS A SQUALL LINE IS CURRENTLY MATURING ALONG

THE DRYLINE NEAR MAF. THIS ACTIVITY SHOULD PROPAGATE EWD AND SHOULD

BE EAST OF 100 LON BY SUNRISE. EXTENSIVE CLOUDS/PRECIPITATION

SHOULD LIMIT LAPSE RATES DOWNSTREAM...THOUGH LOW LEVEL WARM

ADVECTION SHOULD SUPPORT CONTINUED EWD PROPAGATION DURING THE DAY.

IN THE WAKE OF THIS EARLY CONVECTION STRONG HEATING WILL BE NOTED

ALONG THE DRYLINE. ISOLATED SUPERCELLS COULD EVOLVE ACROSS WESTERN

TX/OK AS TEMPERATURES WARM INTO THE MID 80S. MORE SIGNIFICANT

CONVECTION SHOULD DEVELOP ALONG SURGING COLD FRONT OVER KS BY

09/00Z. THIS ACTIVITY WILL SPREAD EWD ALONG THE KS/OK BORDER DURING

THE OVERNIGHT HOURS WITH THE PRIMARY THREAT BEING LARGE HAIL.

..DARROW/MEAD.. 05/08/2014

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post-4544-0-87573500-1399528727_thumb.gi

post-4544-0-27990200-1399528741_thumb.gi

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Random T-storm warning just went up here. Not even seeing any lighting detected. Interesting.

 

Little guy packed a punch. There was a tiny area of enhanced inbounds on the velo scan than pretty much passed right over head. Gusted around 50mph I'd guess.

 

Lotta people caught off-guard outside :( 

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If I can just get get some sunshine this afternoon........

 

 

Yesterday kinda underperformed...was wondering if there might be some carryover effects into today (in a positive way).  Some nice clearing spreading eastward so we'll see if it helps.

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post-14-0-63040300-1399658726_thumb.gif

DISCUSSION...THUNDERSTORMS...INCLUDING SUPERCELLS AND BOWING  STRUCTURES...ARE EXPECTED TO DEVELOP AND SPREAD EAST AND NORTHEAST  ACROSS THE WATCH AREA THIS AFTERNOON INTO EVENING. LARGE HAIL AND  DAMAGING WIND GUSTS WILL BE THE PRIMARY HAZARDS...THOUGH A TORNADO  IS POSSIBLE.  
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BULLETIN - EAS ACTIVATION REQUESTED  

SEVERE THUNDERSTORM WARNING  

NATIONAL WEATHER SERVICE PADUCAH KY  

141 PM CDT FRI MAY 9 2014  

 

THE NATIONAL WEATHER SERVICE IN PADUCAH HAS ISSUED A  

 

* SEVERE THUNDERSTORM WARNING FOR...  

NORTHERN JACKSON COUNTY IN SOUTHERN ILLINOIS...  

SOUTHERN PERRY COUNTY IN SOUTH CENTRAL ILLINOIS...  

NORTH CENTRAL PERRY COUNTY IN SOUTHEAST MISSOURI...  

 

* UNTIL 230 PM CDT.  

 

* AT 140 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES SOUTHEAST  

OF CHESTER...AND MOVING EAST AT 50 MPH. THIS STORM DOWNED TREES IN  

BREWER MISSOURI.  

 

THIS IS A VERY DANGEROUS STORM.  

 

HAZARD...80 MPH WIND GUSTS AND PING PONG BALL SIZE HAIL.

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BULLETIN - EAS ACTIVATION REQUESTED  SEVERE THUNDERSTORM WARNING  NATIONAL WEATHER SERVICE PADUCAH KY  141 PM CDT FRI MAY 9 2014    THE NATIONAL WEATHER SERVICE IN PADUCAH HAS ISSUED A    * SEVERE THUNDERSTORM WARNING FOR...    NORTHERN JACKSON COUNTY IN SOUTHERN ILLINOIS...    SOUTHERN PERRY COUNTY IN SOUTH CENTRAL ILLINOIS...    NORTH CENTRAL PERRY COUNTY IN SOUTHEAST MISSOURI...    * UNTIL 230 PM CDT.    * AT 140 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES SOUTHEAST    OF CHESTER...AND MOVING EAST AT 50 MPH. THIS STORM DOWNED TREES IN    BREWER MISSOURI.      THIS IS A VERY DANGEROUS STORM.      HAZARD...80 MPH WIND GUSTS AND PING PONG BALL SIZE HAIL.

That's a nasty looking storm.

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BULLETIN - EAS ACTIVATION REQUESTED  

TORNADO WARNING  

NATIONAL WEATHER SERVICE PADUCAH KY  

228 PM CDT FRI MAY 9 2014  

 

THE NATIONAL WEATHER SERVICE IN PADUCAH HAS ISSUED A  

 

* TORNADO WARNING FOR...  

SOUTHERN WAYNE COUNTY IN SOUTHEAST MISSOURI...  

 

* UNTIL 300 PM CDT.  

 

* AT 227 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A  

TORNADO WAS LOCATED 6 MILES NORTHWEST OF WILLIAMSVILLE...AND MOVING  

EAST AT 50 MPH.  

 

HAZARD...TORNADO AND GOLF BALL SIZE HAIL.  

 

SOURCE...RADAR INDICATED ROTATION.  

 

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.  

 

* THIS DANGEROUS STORM WILL BE NEAR...  

SHOOK AROUND 245 PM CDT.  

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Tornado warned storm in se MO.

 

 

 

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE PADUCAH KY
228 PM CDT FRI MAY 9 2014

THE NATIONAL WEATHER SERVICE IN PADUCAH HAS ISSUED A

* TORNADO WARNING FOR...
SOUTHERN WAYNE COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 300 PM CDT.

* AT 227 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
TORNADO WAS LOCATED 6 MILES NORTHWEST OF WILLIAMSVILLE...AND MOVING
EAST AT 50 MPH.

HAZARD...TORNADO AND GOLF BALL SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION.

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.

* THIS DANGEROUS STORM WILL BE NEAR...
SHOOK AROUND 245 PM CDT.
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New watch shortly for IN/KY.

 

 

 

MESOSCALE DISCUSSION 0538
NWS STORM PREDICTION CENTER NORMAN OK
0235 PM CDT FRI MAY 09 2014

AREAS AFFECTED...PARTS OF SE MO...CNTRL AND SRN IL...IND...WRN AND
CNTRL KY

CONCERNING...SEVERE THUNDERSTORM WATCH 135...

VALID 091935Z - 092130Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 135
CONTINUES.

SUMMARY...SEVERE HAIL/WIND THREAT IS EXPECTED TO CONTINUE TO
INCREASE WITH CONVECTION LATE THIS AFTERNOON. A NEW SEVERE WEATHER
WATCH EAST OF WW 135 WILL LIKELY BE ISSUED SHORTLY.

DISCUSSION...BOUNDARY LAYER RECOVERY CONTINUES ACROSS THE LOWER OHIO
VALLEY WITH INSOLATION. DESTABILIZATION ACROSS SOUTHEASTERN
MISSOURI AND CENTRAL/SOUTHERN ILLINOIS INTO PARTS OF INDIANA AND
WESTERN/CENTRAL KENTUCKY THROUGH 22-23Z WILL BE AUGMENTED BY
MID-LEVEL COOLING AND FORCING FOR ASCENT ACCOMPANYING A WEAKENING
500 MB SPEED MAXIMUM AND ASSOCIATED SHORT WAVE IMPULSE. NEW STORM
DEVELOPMENT IS EVIDENT JUST AHEAD OF THE SURFACE FRONT NEAR DECATUR
IL...AND MOST INTENSE CURRENT STORM APPEARS LIKELY TO CONTINUE
TRACKING EAST OF THE CARBONDALE IL AREA...INTO THE VICINITY OF
EVANSVILLE BY AROUND 21Z...AND EAST OF THE CURRENT WATCH SHORTLY
THEREAFTER. FURTHER UPSCALE GROWTH OF CONVECTION INTO AN ORGANIZING
MESOSCALE CONVECTIVE SYSTEM WITH INCREASING DAMAGING WIND
POTENTIAL...IN THE PRESENCE OF 30-50+ KT WESTERLY LOWER/MID
TROPOSPHERIC WIND FIELDS...APPEARS POSSIBLE THROUGH PEAK LATE
AFTERNOON HEATING.

..KERR/MEAD.. 05/09/2014

 

post-4544-0-36222400-1399664621_thumb.gi

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BULLETIN - EAS ACTIVATION REQUESTED

TORNADO WARNING

NATIONAL WEATHER SERVICE PADUCAH KY

257 PM CDT FRI MAY 9 2014

THE NATIONAL WEATHER SERVICE IN PADUCAH HAS ISSUED A

* TORNADO WARNING FOR...

SOUTHERN BOLLINGER COUNTY IN SOUTHEAST MISSOURI...

NORTH CENTRAL STODDARD COUNTY IN SOUTHEAST MISSOURI...

EAST CENTRAL WAYNE COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 345 PM CDT.

* AT 254 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A

TORNADO WAS LOCATED NEAR SHOOK...AND MOVING EAST AT 50 MPH.

HAZARD...TORNADO AND GOLF BALL SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION.

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.

* THIS DANGEROUS STORM WILL BE NEAR...

ADVANCE AROUND 320 PM CDT.

OTHER LOCATIONS IN THE WARNING INCLUDE ZALMA.

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There's a thin area roughly between IND and LAF oriented SW to NE between the two convective areas thats been getting some good heating the last few hours.  Throw some outflow boundaries in there and might get a few nice pearls popping in the next hour or 2.

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