[spotters-illianaskywarn] Fwd: NOAA's National Weather Service SPC Mesoscale Discussion Update
- From: Keith Reedy <keithreedy@xxxxxxxxxxxx>
- To: spotters-illianaskywarn@xxxxxxxxxxxxx
- Date: Wed, 11 May 2011 16:47:31 -0400
Keith Reedy
keithreedy@xxxxxxxxxxxx
Begin forwarded message:
> From: National Weather Service <nws.noaa@xxxxxxxxxxxxxxxxxxxxxxx>
> Date: May 11, 2011 4:44:12 PM EDT
> To: keithreedy@xxxxxxxxxxxx
> Subject: NOAA's National Weather Service SPC Mesoscale Discussion Update
> Reply-To: National Weather Service <nws.noaa@xxxxxxxxxxxxxxxxxxxxxxx>
>
> You are subscribed to SPC Mesoscale Discussion for NOAA's National Weather
> Service.
>
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>
> SPC MD 739
>
> 05/11/2011 04:39 PM EDT
>
> MD 0739 CONCERNING SEVERE THUNDERSTORM WATCH 281... FOR CNTRL/SRN WI...ERN
> IA...CNTRL/NRN IL
>
>
>
> MESOSCALE DISCUSSION 0739
> NWS STORM PREDICTION CENTER NORMAN OK
> 0338 PM CDT WED MAY 11 2011
>
> AREAS AFFECTED...CNTRL/SRN WI...ERN IA...CNTRL/NRN IL
>
> CONCERNING...SEVERE THUNDERSTORM WATCH 281...
>
> VALID 112038Z - 112245Z
>
> THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 281
> CONTINUES.
>
> CONVECTION OVER SRN/CNTRL WI IS SHIFTING EWD/NEWD AWAY FROM THE SFC
> WARM FRONT...AND HAS LARGELY BECOME ELEVATED AFTER MOVING AWAY FROM
> THE SURFACE-BASED UNSTABLE SECTOR NORTH OF THE WARM FRONT. THIS
> ACTIVITY WILL CONTINUE TO POSE A THREAT FOR LARGE HAIL AS IT
> APPROACHES LAKE MICHIGAN...THOUGH THE THREAT FOR DMGG WINDS WILL
> LIKELY DECREASE DUE TO INTERACTION WITH THE STABLE MARINE LAYER
> INVOF THE COASTLINE.
>
> THE WARM FRONT EXTENDS TO A SFC MESOLOW OVER SWRN WI. SOUTH OF THIS
> FRONT...THE POTENTIAL FOR SFC-BASED SVR MULTICELLULAR STORMS WITH
> DMGG WINDS AND LARGE HAIL WILL EVOLVE ACROSS PORTIONS OF NRN AND
> CNTRL IL. THIS ACTIVITY IS IN ASSOCIATION WITH A MID-LEVEL IMPULSE
> BRUSHING THE MID-MISSISSIPPI VALLEY REGION. TO ADDRESS THIS
> ISSUE...WW281 HAS BEEN EXPANDED SWD INTO CNTRL IL UPON LOCAL WFO
> COORDINATION.
>
> WEST OF THE MESOLOW...A STATIONARY FRONT /WEAKENED BY EARLIER
> CONVECTION OVER IA/ EXTENDS ACROSS NRN IA. HOWEVER...THE EFFECTIVE
> BAROCLINIC ZONE WILL CONTINUE TO LIFT NORTHWARD THROUGH LATE
> AFTERNOON...AND COULD PROVIDE A FOCUS FOR ADDITIONAL CONVECTION
> LATER THIS AFTERNOON IN SWRN PORTIONS OF THE WW. HOWEVER...THE ONSET
> OF THIS INITIATION COULD BE DELAYED UNTIL THE SUBSIDENCE IN THE WAKE
> OF THE AFOREMENTIONED IMPULSE HAS DEPARTED THAT AREA.
>
> ..COHEN.. 05/11/2011
>
> ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
>
> ATTN...WFO...GRB...LOT...ILX...MKX...LSX...DVN...ARX...DMX...
> EAX...
>
> LAT...LON 39598879 39339009 39609070 40219132 40269306 41359279
> 42229255 43689161 44759074 44758906 44638736 43998737
> 41498819 40418827 39598879
>
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