Decatur, Illinois 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

137
FXUS63 KILX 111832
AFDILX

Area Forecast Discussion
National Weather Service Lincoln IL
132 PM CDT Fri Apr 11 2025

.KEY MESSAGES...

- Freeze Warning and Frost Advisory in effect overnight until mid
  morning east of I-55 with lows 30-32F.

- Sunday will be breezy with winds out of the south gusting to
  30-35 mph.

- Slight chance (10-20% chance) of isolated showers on Monday as a
  low pressure system moves across the Midwest.

&&

.DISCUSSION...
Issued at 132 PM CDT Fri Apr 11 2025

A quiet stretch of weather hangs around through the weekend as a
high pressure scoots on through. Tonight will get chilly, dropping
near to below freezing, especially along/east of highway 51. A
Freeze Warning is in effect for eastern IL from 2am to 9am
tomorrow morning, elsewhere could see some frosty lawns and
windows in the morning. Highs will warm over the weekend, with
Sunday as the warmest day with highs in the upper 60s to mid 70s.

When the high pushes east, Sunday will be quite windy due to the
increased pressure gradient building in the west that will be
associated with a budding low pressure system over the Plains. Winds
out of the south could gust as high as 35 mph at times.

Monday morning could have some isolated showers as the
aforementioned low pressure travels eastward across the region.
Tuesday will be dry but windy as the associated pressure gradient
exits to the east. The GFS is hinting at potentially bigger system
around the Thursday timeframe.

Copple

&&

.AVIATION...  (For the 18z TAFs through 18z Saturday Afternoon)
Issued at 1221 PM CDT Fri Apr 11 2025

VFR conditions will prevail through the 18z TAF period. Northerly
winds will be breezy (10-15 knots) could occasionally gust up to 20-
25 knots this afternoon. By the evening (00-04z), winds will become
light and variable. They are forecast to remain that way late in the
morning tomorrow. A lower deck of cumulus will push south from Lake
Michigan mainly impacting CMI and BMI, but remaining VFR ceilings.

Copple

&&

.ILX WATCHES/WARNINGS/ADVISORIES...
Frost Advisory from 2 AM to 9 AM CDT Saturday for ILZ042-043-048-
051>053.

Freeze Warning from 2 AM to 9 AM CDT Saturday for ILZ044>046-
054>057-061>063-066>068-071>073.

&&

$$