Wednesday, June 12, 2013

Mesoscale Discussion 23:51:06.8500734

AREAS AFFECTED...IL...IND..LOWER MI...OH

CONCERNING...SEVERE THUNDERSTORM WATCH 300...

VALID 130450Z - 130615Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 300
CONTINUES.

SUMMARY...A SEVERE THREAT IS EXPECTED TO CONTINUE ACROSS WW 300 OVER
1 TO 2 HOURS. WIND DAMAGE AND A FEW TORNADOES MAY OCCUR WITH THE
GREATEST THREAT ACROSS THE SRN AND ERN PART OF THE WATCH.

DISCUSSION...A WELL-DEVELOPED BOWING LINE-SEGMENT WILL CONTINUE TO
MOVE QUICKLY SEWD ACROSS WCNTRL OH AND CNTRL IND. FORWARD MOTION OF
THE LINE IS ESTIMATED AT 50 KT WHICH WILL CONTINUE TO SUPPORT A
WIDESPREAD THREAT FOR WIND DAMAGE OVER THE NEXT FEW HOURS. ALTHOUGH
THE THREAT FOR WIDESPREAD DAMAGING WINDS SHOULD BECOME MORE ISOLATED
AFTER 06Z AS THE BOWING LINE MOVES TO THE EAST OF THE WATCH...AN
ISOLATED SEVERE THREAT MAY CONTINUE AS A SECOND LINE OF STORMS
APPROACHES FROM THE NORTHWEST. MODERATE INSTABILITY IS STILL PRESENT
ACROSS THE WRN PART OF THE WATCH COMBINED WITH STRONG DEEP LAYER
SHEAR AND INCREASING LARGE-SCALE ASCENT...MAY BE ENOUGH FOR AN
ISOLATED WIND DAMAGE THREAT AS THE SECOND LINE MOVES INTO NW IND.

..BROYLES/HART.. 06/13/2013

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

ATTN...WFO...CLE...ILN...DTX...IWX...GRR...IND...LOT...ILX...
MKX...

LAT...LON 39808750 39368594 39678343 40778210 41968220 42788303
43098567 42918751 41868856 40448885 39808750