NWS STORM PREDICTION CENTER NORMAN OK
1049 AM CST SUN NOV 17 2013
AREAS AFFECTED...IL...SERN WI...E-CNTRL MO
CONCERNING...TORNADO WATCH 561...
VALID 171649Z - 171815Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 561 CONTINUES.
SUMMARY...RISK FOR SIGNIFICANT AND POTENTIALLY LONG-TRACK TORNADOES
APPEARS TO BE INCREASING...ESPECIALLY ACROSS PARTS OF CNTRL/ERN IL.
DISCUSSION...NUMEROUS PRE-FRONTAL STORMS HAVE FORMED FROM NEAR
MILWAUKEE S/SWWD TOWARDS ST LOUIS. 16Z ILX RAOB WELL-SAMPLED THE
AMBIENT WARM SECTOR...DEPICTING MODERATE BUOYANCY DESPITE A SLIGHT
INVERSION NOTED NEAR 600 MB. LOW-LEVEL HODOGRAPHS HAVE BECOME EVEN
LARGER IN LATEST VWP DATA FROM ILX WITH A CLASSIC SICKLE-SHAPE AND
0-1 KM SRH AROUND 500 M2/S2. POTENTIAL IS HIGH FOR SEVERAL
SUPERCELLS AND GIVEN RAPID STORM MOTIONS...A FEW SHOULD BE
LONG-TRACKED ACROSS THE HEART OF IL WITH SIGNIFICANT TORNADOES.
..GRAMS.. 11/17/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...IND...PAH...LOT...ILX...MKX...LSX...DVN...
LAT...LON 38188974 38479119 40669042 42428943 43108797 42538744
40868731 38878818 38188974
