Area Forecast Discussion
Issued by NWS Central Illinois

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FXUS63 KILX 212001

Area Forecast Discussion
National Weather Service Lincoln IL
301 PM CDT Fri Apr 21 2017

.SHORT TERM...(This evening through Saturday)
ISSUED AT 301 PM CDT Fri Apr 21 2017

This afternoon, high pressure continues to build into the northern
Plains and into the Upper Midwest.  Yesterdays cold front has
drifted south of the Ohio River Valley, with northerly winds behind
it and plenty of cirrus limiting the diurnal swing with the temps
for Central Illinois.  For the overnight hours, expecting the
moderate cirrus to remain in place for much of the state...with
another wave of precip moving into the region from the SW and mostly
impacting areas along and south of I-70.  Either way, temperatures
remain moderate overnight, only dropping into the low to mid 40s.
For tomorrow, similar forecast to today with northerly winds keeping
the temperatures cool, and another upper level disturbance moving
through the Ohio River Valley, maintaining the precip along and
south of I-70.


.LONG TERM...(Saturday night through Friday)
ISSUED AT 301 PM CDT Fri Apr 21 2017

Forecast slowly dries out Sat night and into Sunday as a wave out of
the northwest dives into the weak trof aloft, briefly amplifying the
wave pattern over the eastern half of the CONUS and moving out to
the east. Sunday will be mostly dry, sunny, and far more seasonable
for Spring, with highs in the mid to upper 60s.

Pleasant weather continuing through Monday with mostly sunny skies
and warmer breezes as southerly winds kick in on the other side of
the high pressure ridge axis that passes over Sunday night.
Southerly winds bring a warm advection pattern that lasts at least
through early Tuesday. The forecast beyond that becomes somewhat
sketchy with light pops in the grids as the models work out the next
series of short waves that ripple across the country in mostly zonal
flow. Tuesday overnight into Wednesday is one of the better chances
as a cold front traverses the region.


.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 1253 PM CDT Fri Apr 21 2017

With the front well to the south of ILX terminals...forecast is
mainly VFR, cirrus, and wind. Northerly winds becoming more
northeasterly in the overnight hours. Gusts expected to return
tomorrow mid morning. It is possible that SPI and maybe DEC at the
outside will have a VCSH...but confidence is low as to the
northerly extent of the potential showers in the morning.




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