Area Forecast Discussion
Issued by NWS Central Illinois

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FXUS63 KILX 241131

Area Forecast Discussion
National Weather Service Lincoln IL
631 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 12Z TAFS through 12Z Friday morning)
Issued at 631 AM CDT Thu May 24 2018

Quiet aviation weather will prevail over the next 24 hours, under
high surface pressure. Weak pressure gradients will allow winds to
sustain below 10kt, with directions mainly from the SE.

Dry air in the upper levels will mean cloud cover will be
minimal, with mainly thin cirrus from time to time through 12z




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