Area Forecast Discussion
Issued by NWS Central Illinois

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FXUS63 KILX 240658

Area Forecast Discussion
National Weather Service Lincoln IL
158 AM CDT Thu May 24 2018

.SHORT TERM...(Today and tonight)
ISSUED AT 158 AM CDT Thu May 24 2018

Upper level ridging extends up the Mississippi Valley into
Manitoba early this morning. This should start to flatten a bit
tonight as a wave over northern Montana starts to push east. With
not much change in air mass, temperatures will edge up a bit from
yesterday, with most areas in the mid to upper 80s. Can`t rule out
some 90 degree readings west of I-55, especially over the sandy
soils near the Illinois. High-resolution models indicate some
thunderstorm development to our west after midnight. Currently
think any impact from this would be Friday morning, so will
maintain a dry forecast for now.


.LONG TERM...(Friday through Wednesday)
ISSUED AT 158 AM CDT Thu May 24 2018

Dominant feature of the next several days will be the summer-like
air mass. No real pushes of colder air are on tap, as an upper
ridge strengthens over the Plains this weekend. Incoming tropical
system from the Gulf will get trapped over the southeast U.S. and
contribute to the blockage of weather patterns. Thus, a slow
building of the heat and humidity will occur through the holiday
weekend. Most areas will be 90 or above for highs into the middle
of next week, with heat index values in the mid-upper 90s.

With the stagnant pattern in place, convective trends will
generally be diurnal. Most convection will be scattered, with any
meaningful impact from the tropical remnants holding off until the
end of the period.


.AVIATION...(For the 06Z TAFS through 06Z Thursday night)
Issued at 1202 AM CDT Thu May 24 2018

High pressure will dominate the weather pattern across the central
Illinois terminals through the 06Z TAF valid time. Light/variable
winds tonight will trend southeast on Thursday. Little to no
cloud cover is expected, and any clouds should remain well into
the VFR category.




SHORT TERM...Geelhart
LONG TERM...Geelhart
AVIATION...Bak is the U.S. government's official web portal to all federal, state and local government web resources and services.