The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 48
NWS Storm Prediction Center Norman OK
950 PM CST Tue Feb 28 2017
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Central, northern and eastern Illinois
* Effective this Tuesday night and Wednesday morning from 950 PM
until 400 AM CST.
* Primary threats include...
A few tornadoes possible
Scattered damaging wind gusts to 70 mph possible
Isolated very large hail events to 2 inches in diameter possible
SUMMARY...The severe-storm threat (including tornadoes) will
continue for several more hours overnight past the expiration of
tornado watch 42; therefore, this tornado watch effectively will
replace it for the designated counties. Please see SPC mesoscale
discussion 225 for initial meteorological reasoning.
The tornado watch area is approximately along and 75 statute miles
east and west of a line from 35 miles south southwest of Decatur IL
to 25 miles east northeast of Marseilles IL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
OTHER WATCH INFORMATION...CONTINUE...WW 42...WW 43...WW 44...WW
45...WW 46...WW 47...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 26035.