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For the counties of Cass, Champaign, Christian, Clark, Clay, Coles,
Crawford, Cumberland, DeWitt, Douglas, Edgar, Effingham, Jasper,
Lawrence, Logan, Macon, Mason, Menard, Morgan, Moultrie, Piatt,
Richland, Sangamon, Schuyler, Scott, Shelby and Vermilion:
Friday and Friday night
There is a moderate risk of severe thunderstorms, including
strong and long-track tornadoes, across parts of central,
east-central and southeast Illinois into early Friday night.
Widely scattered showers and thunderstorms will gradually come to
an end for a time Friday morning; however, as a weather disturbance
pushes across the plains and heads for the Midwest in the afternoon,
additional thunderstorms will develop to the southwest and track
rapidly toward this area. These storms will interact with an
unstable and highly sheared environment over central, east-central
and southeast Illinois, leading to the rapid development of
supercells, which will be capable of producing large hail and
tornadoes. Present indications suggest that thunderstorms will begin
to push into southwest Illinois between 2 and 3 p.m. and continue
well into the evening hours before transitioning to more of a heavy
rain threat around midnight.
[to top of second
column in this section] |
Saturday through Thursday
A cold front will approach central, east-central and southeast
Illinois later Saturday afternoon and evening, which will increase
the chances for severe thunderstorms. Showers and thunderstorms may
be ongoing in the morning, which may limit the amount of instability
across the area, but the wind-shear profiles still suggest the
potential for another active afternoon and early evening.
People with outdoor plans Friday afternoon through Saturday
should monitor the latest forecasts for updated information on the
threat for severe weather during that period.
Spotter information statement
Spotter activation will be needed later Friday afternoon into the
evening. Present indications suggest the primary time frame for
activation will be from 2 p.m. until 10 p.m. Spotter activation may
be required again Saturday afternoon and evening.
[National Weather Service,
Lincoln office] |
