UPDATED: Tornado watch extended to Indiana line
UPDATED 5:20 p.m.
The National Weather Service has extended a tornado watch for much of central Illinois, including some counties on the state line with Indiana. Champaign, Vermiliion, Douglas, Edgar and Coles counties are included.
The original notice from the weather service:
TORNADO WATCH OUTLINE UPDATE FOR WT 602
NWS STORM PREDICTION CENTER NORMAN OK 1245 PM CDT SAT SEP 1 2012 TORNADO WATCH 602 IS IN EFFECT UNTIL 900 PM CDT FOR THE FOLLOWING LOCATIONS ILC017-019-021-029-035-039-041-057-095-107-113-115-123-125-129- 137-139-143-147-167-169-171-173-175-179-203-020200- /O.NEW.KWNS.TO.A.0602.120901T1745Z-120902T0200Z/ IL . ILLINOIS COUNTIES INCLUDED ARE CASS CHAMPAIGN CHRISTIAN COLES CUMBERLAND DE WITT DOUGLAS FULTON KNOX LOGAN MACON MARSHALL MASON MCLEAN MENARD MORGAN MOULTRIE PEORIA PIATT SANGAMON SCHUYLER SCOTT SHELBY STARK TAZEWELL WOODFORD
Here's the updated notice:
WATCH COUNTY NOTIFICATION FOR WATCH 602 NATIONAL WEATHER SERVICE LINCOLN IL 119 PM CDT SAT SEP 1 2012 ILC023-025-033-045-049-079-101-159-183-020200- /O.EXA.KILX.TO.A.0602.000000T0000Z-120902T0200Z/ THE NATIONAL WEATHER SERVICE HAS EXTENDED TORNADO WATCH 602 TO INCLUDE THE FOLLOWING AREAS UNTIL 9 PM CDT THIS EVENING IN ILLINOIS THIS WATCH INCLUDES 9 COUNTIES IN EAST CENTRAL ILLINOIS CLARK CRAWFORD EDGAR VERMILION IN SOUTH CENTRAL ILLINOIS CLAY EFFINGHAM IN SOUTHEAST ILLINOIS JASPER LAWRENCE RICHLAND THIS INCLUDES THE CITIES OF...DANVILLE...EFFINGHAM... FLORA AND LAWRENCEVILLE.
- This is issued by the National Weather Service when conditions are favorable for the development of tornadoes in and close to the watch area. Their size can vary depending on the weather situation. They are usually issued for a duration of 4 to 8 hours. They normally are issued well in advance of the actual occurrence of severe weather. During the watch, people should review tornado safety rules and be prepared to move a place of safety if threatening weather approaches.
A Tornado Watch is issued by the Storm Prediction Center (SPC) in Norman, Oklahoma. Prior to the issuance of a Tornado Watch, SPC will usually contact the affected local National Weather Forecast Office (NWFO) and they will discuss what their current thinking is on the weather situation. Afterwards, SPC will issue a preliminary Tornado Watch and then the affected NWFO will then adjust the watch (adding or eliminating counties/parishes) and then issue it to the public. After adjusting the watch, the NWFO will let the public know which counties are included by way of a Watch Redefining Statement. During the watch, the NWFO will keep the public informed on what is happening in the watch area and also let the public know when the watch has expired or been cancelled.