AREAS AFFECTED...ERN IL...WRN IND
CONCERNING...TORNADO WATCH 561...562...
VALID 171757Z - 171930Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 561...562...CONTINUES.
SUMMARY...GREATEST NEAR-TERM SIGNIFICANT TORNADO RISK IS APPROACHING
THE I-55 AND I-57 CORRIDORS BETWEEN JOLIET AND KANKAKEE AND PERHAPS
THE SRN PORTIONS OF THE CHICAGOLAND METRO AREA.
DISCUSSION...AN INTENSE SUPERCELL OVER NWRN LIVINGSTON COUNTY IL HAS
HAD A TORNADO CYCLONE EVIDENT IN RADAR IMAGERY FOR NEARLY 50 MILES.
DOWNSTREAM ENVIRONMENT REMAINS SUPPORTIVE FOR A LONG-TRACK
SIGNIFICANT TORNADO GIVEN A SICKLE-CELL ENLARGED HODOGRAPH STRUCTURE
SAMPLED IN ILX VWP DATA AND SURFACE TEMPERATURES WARMING INTO THE
LOWER 70S IMMEDIATELY AHEAD OF THE BROKEN BAND OF SUPERCELLS.
ADDITIONAL LONG-TRACK/SIGNIFICANT TORNADOES MAY EVOLVE E/NEWD OUT OF
PERSISTENT SUPERCELLS CURRENTLY IN MCLEAN AND CHRISTIAN COUNTIES IN
CNTRL IL.
..GRAMS.. 11/17/2013
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...IWX...IND...LOT...ILX...
LAT...LON 42158783 41638684 40918652 39768683 39518758 39408852
39488899 39988899 41478854 41868812 42158783
