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June 21-27 Severe Weather


Chicago Storm

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ACUS11 KWNS 271743

SWOMCD

SPC MCD 271742

MIZ000-WIZ000-ILZ000-272015-

MESOSCALE DISCUSSION 1268

NWS STORM PREDICTION CENTER NORMAN OK

1242 PM CDT THU JUN 27 2013

AREAS AFFECTED...PORTIONS WI...EXTREME NERN IL...LM...SRN UPPER

MI...WRN LOWER MI.

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 271742Z - 272015Z

PROBABILITY OF WATCH ISSUANCE...40 PERCENT

SUMMARY...SVR POTENTIAL MAY INCREASE THROUGH AFTN OVER DISCUSSION

AREA TO EXTENT THAT INITIALLY ISOLATED CONVECTION OVER PARTS OF NRN

AND CENTRAL WI CAN GROW UPSCALE WITH ADDITIONAL DEVELOPMENT

POSSIBLE. MAIN CONCERNS ARE LARGE HAIL AND SPORADIC DAMAGING GUSTS.

DISCUSSION...SFC PATTERN IS RATHER SUBTLE AND FRAGMENTED ACROSS THIS

AREA...WITH POCKETS OF STRONGER VERSUS WEAKER MOISTURE/MIXING AND

HEATING AWAY FROM LM MARINE LAYER. MODEL FCST SOUNDINGS AND

MODIFIED RAOBS SUGGEST AIR MASS ACROSS THIS REGION ESSENTIALLY HAS

LOST MLCINH. SFC DEW POINTS HAVE MIXED DOWN A FEW DEG F DURING LAST

1-2 HOURS FROM PEAK VALUES AT SEVERAL STATIONS IN WI...OFFSET ENOUGH

BY SFC DIABATIC HEATING TO MAINTAIN MLCAPE 1000-2000 J/KG. BUOYANCY

SHOULD REMAIN RELATIVELY MAXIMIZED WITHIN ABOUT 75 NM EITHER SIDE OF

MOISTURE/THETAE AXIS DRAWN FROM SERN IL NNWWD ACROSS S-CENTRAL/WRN

WI. WELL-MIXED SUBCLOUD LAYER WILL SUPPORT DOWNDRAFT ACCELERATION

AS WELL AS MAINTENANCE TO SFC OF ANY SVR HAIL GENERATED ALOFT.

VEERED LOW-LEVEL WINDS WILL LIMIT BOUNDARY-LAYER CONVERGENCE AND

HODOGRAPH SIZE. HOWEVER...DEEP SHEAR IS ENHANCED AROUND SRN RIM OF

MID-UPPER PERTURBATION THAT IS EVIDENT IN MOISTURE CHANNEL IMAGERY

OVER LS. THAT...ALONG WITH BUILDING RIDGE OVER SWRN CONUS...SHOULD

MAINTAIN ENHANCED GRADIENT FLOW ALOFT FOR EFFECTIVE SHEAR MAGNITUDES

RANGING FROM AROUND 60 KT OVER WRN WI TO AROUND 30 KT OVER WRN LM.

..EDWARDS/KERR.. 06/27/2013

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...APX...IWX...GRR...MQT...GRB...LOT...MKX...DLH...

ARX...MPX...

LAT...LON 46069010 45608712 43738543 42388590 41918708 42418906

43989077 45079114 46069010

--

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Still pretty early. 12z SPC WRF doesn't bring anything toward Chicago until early evening.

 

 

It's early but not that early.  I just think forcing is going to be a little too weak in this area for anything other than a widely scattered threat for the far NE cwa and into WI and MI.

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Storms firing NE of Madison. Eastern WI looks like a favorable area for further development.

Some of those storms may hit Geos, but will die at Alek's doorstep. Nothing out of the ordinary.

 

Looks like right now the storms will graze by to the north. Probably impact Racine and Milwaukee.

 

First warning.

 

 

SEVERE THUNDERSTORM WARNING

WIC027-079-089-131-133-272000-/O.NEW.KMKX.SV.W.0048.130627T1915Z-130627T2000Z/BULLETIN - IMMEDIATE BROADCAST REQUESTEDSEVERE THUNDERSTORM WARNINGNATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI215 PM CDT THU JUN 27 2013THE NATIONAL WEATHER SERVICE IN SULLIVAN HAS ISSUED A* SEVERE THUNDERSTORM WARNING FOR...  EAST CENTRAL DODGE COUNTY IN SOUTHEAST WISCONSIN...  NORTHERN MILWAUKEE COUNTY IN SOUTHEAST WISCONSIN...  SOUTHWESTERN OZAUKEE COUNTY IN SOUTHEAST WISCONSIN...  SOUTHERN WASHINGTON COUNTY IN SOUTHEAST WISCONSIN...  NORTHEASTERN WAUKESHA COUNTY IN SOUTHEAST WISCONSIN...* UNTIL 300 PM CDT* AT 210 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR HARTFORD...  AND MOVING SOUTHEAST AT 35 MPH.  HAZARD...QUARTER SIZE HAIL AND 60 MPH WIND GUSTS.  SOURCE...RADAR INDICATED.  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO           ROOFS...SIDING AND TREES.* THE SEVERE THUNDERSTORM WILL BE NEAR...  SLINGER AROUND 220 PM CDT.  JACKSON AROUND 230 PM CDT.  LANNON AROUND 240 PM CDT.  MENOMONEE FALLS AROUND 245 PM CDT.  MEQUON AND THIENSVILLE AROUND 250 PM CDT.  BROWN DEER AND RIVER HILLS AROUND 255 PM CDT.OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE HOLYHILL...HUBERTUS...BEAR VALLEY...RICHFIELD...COLGATE...GERMANTOWN...GLENDALE...SHOREWOOD...UW-MILWAUKEE AND MILWAUKEE BRADFORD BEACH.



			
		
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:pimp:

 

Nothing severe by any means but it just keeps growing and back building....unfortunately I'm stuck in a large laboratory at the moment and I can only hear muddled thunder :(

 

Radar estimate says 1.23" in the past 40 min...

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