Area Forecast Discussion
Issued by NWS Central Illinois

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FXUS63 KILX 152059
AFDILX

Area Forecast Discussion
National Weather Service Lincoln IL
259 PM CST Mon Jan 15 2018

.SHORT TERM...(This evening through Tuesday)
ISSUED AT 259 PM CST Mon Jan 15 2018

A bitterly cold airmass has invaded central Illinois in the wake
of the clipper system that passed earlier today. 20z/3pm
temperatures have dropped into the single digits and teens across
the entire area...with wind-chills ranging from zero to 10 below
zero. While skies have partially cleared across all but the far SE
KILX CWA, additional clouds associated with a sharp trough over
the Great Lakes/Upper Midwest will pivot southward tonight. The
end result will be mostly cloudy skies with a few flurries from
time to time. The clouds will keep temps from dropping as low as
they otherwise would, with guidance suggesting lows around zero.
With brisk northwesterly winds of 10-15 mph expected to last all
night, wind-chill values will bottom out from 10 below to 20 below
zero. As a result, the Wind Chill Advisory will remain in effect
for all of central and southeast Illinois tonight through Tuesday
morning. Clouds and flurries will hang around through the entire
day Tuesday, with afternoon highs only in the teens.

&&

.LONG TERM...(Tuesday night through Monday)
ISSUED AT 259 PM CST Mon Jan 15 2018

Its smooth sailing in the extended. After one more cold day on
Wednesday with high temperatures in the lower 20s, a marked
warming trend will get underway for the end of the week.
Temperatures will climb into the 30s on Thursday...then will soar
into the 50s by Saturday and Sunday. As has been advertised for
the past few days, the next storm system of note will not impact
the region until late in the weekend...resulting in rain chances
arriving by Saturday night and Sunday. In fact, if the GFS low
track across central Illinois verifies, would not be surprised to
see some isolated thunder introduced to the forecast Sunday/Sunday
night.

&&

.AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon)
Issued at 1148 AM CST Mon Jan 15 2018

Skies have partially cleared across much of central Illinois late
this morning: however, satellite imagery is showing re-development
of a thin layer of low clouds within the bitterly cold airmass.
Based on satellite and ob trends over the past couple of hours,
have opted to maintain MVFR ceilings through the afternoon. Winds
will remain strong/blustery today...with northwesterly gusts of
20-30kt. The I-74 terminals have consistently shown slightly
reduced visbys despite an end to the light snow, so have included
BLSN at those sites. Winds will gradually decrease tonight, but
will remain in the 10-15kt range late tonight into Tuesday
morning. MVFR clouds and a few flurries will continue as well...as
an upper trough pivots southward into the region.


&&

Wind Chill Advisory from 6 PM this evening to noon CST Tuesday
for ILZ027>031-036>038-040>057-061>063-066>068-071>073.

&&

$$

SHORT TERM...Barnes
LONG TERM...Barnes
AVIATION...Barnes



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