Mount Vernon, IL

18°F / -8°C
Clear
Windchill: 11°F / -12°C
Humidity: 63%
Dew Point: 7°F / -14°C
Wind: West at 5 mph / 7 km/h
Pressure: 30.52 in / 1033 hPa (Falling)
Visibility: 10.0 miles / 16.1 kilometers
Clouds: Clear (CLR) : -
Yesterday's Maximum: 27°F / -3°C
Yesterday's Minimum: 18°F / -8°C approx.
Yesterday's Heating Degree Days: 43 approx.
UV: 0 out of 16
Sunrise:6:50 AM CST
Sunset:5:30 PM CST
Moon Rise:11:21 PM CST
Moon Set:9:14 AM CST
Moon Phase Waning Gibbous
NOAA Weather Radio
METAR KMVN 121155Z AUTO 28004KT 10SM CLR M08/M14 A3052 RMK AO1 11060 21080 52014
As of: 5:55 AM CST on February 12, 2012
Observed at: Mount Vernon, IL

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Forecast

Today
clear
32° | 18°F
| -8°C
Monday
sleet
34° | 29°F
| -2°C
Tuesday
mostlycloudy
38° | 27°F
| -3°C
Today is forecast to be
Warmer than yesterday.
Today
Sunny. Highs in the lower 30s. Northwest winds 10 to 15 mph.
Tonight
Mostly clear. Lows around 19. West winds around 5 mph in the evening shifting to the south after midnight.
Monday
Cloudy. Snow showers likely in the afternoon. Snow accumulation up to 1 inch. Highs in the mid 30s. South winds 10 to 15 mph. Chance of precipitation 60 percent.
Monday Night
Occasional snow in the evening...then snow showers likely...a chance of freezing drizzle and sleet after midnight. Lows around 30. South winds 10 to 15 mph. Chance of precipitation near 100 percent.
Tuesday
Mostly cloudy. Highs in the upper 30s. West winds 5 to 10 mph.
Tuesday Night
Partly cloudy. Lows in the upper 20s.
Wednesday
Partly sunny. Highs in the upper 40s.
Wednesday Night
Rain likely. Lows in the upper 30s. Chance of precipitation 60 percent.
Thursday
Partly sunny with a 40 percent chance of rain. Highs in the upper 40s.
Thursday Night
Partly cloudy. Lows in the lower 30s.
Friday through Saturday
Mostly clear. Highs in the upper 40s. Lows around 30.
As of: 5:36 am CST on February 12, 2012

Scientific Forecaster Discussion

Warnings & Notices

Special Weather Statement

Expires 4:00 PM CST on February 12, 2012
Statement as of 3:38 am CST on February 12, 2012

... Winter weather event likely Monday and Monday night...

Moisture will over spread the region Monday... ahead of an upper
level storm system... forecast to be over western Missouri by
Monday evening. The wintry precipitation may be slow to develop
initially Monday west of the Mississippi River over southeast
Missouri... as the airmass will be very dry across the region.
However by afternoon... wintry precipitation should work its way to
the surface... with the activity spreading east from southeast
Missouri Monday afternoon... to areas east of the Mississippi River
including southern Illinois... southwest Indiana and west Kentucky
late Monday afternoon into Monday evening.

Most of the wintry precipitation is expected to be in the form
of snow. However... mixed wintry precipitation is possible as well
with this event... especially south of the Ohio River... and
over southeast Missouri.

Preliminary indications suggest no less than 1 to 2 inches may
accumulate most areas. Some data suggests higher amounts will
be possible. Given the Prospect for mixed wintry precipitation
and the variance seen in the model data... it is still a bit too
soon to gauge snowfall amounts with much confidence. The latest
data suggests higher precipitation rates will occur south of a
line from Perryville Missouri to Owensboro Kentucky which is also
where the best chance of a wintry mix will occur. The best chance
of any freezing rain will be west of the Mississippi River Monday
evening.

Despite the uncertainties with respect to snow amounts... it does
appear that travel impacts will be possible Monday night. Surface
temperatures... antecedent Road conditions... and precipitation
rates will all play a role in the level of impact. Given the cold
air well established across the region ahead of the approaching
system... accumulation will begin shortly after onset.

So... stay tuned for the latest updates. It is possible either
a watch... warning or advisory may be required for the upcoming
event.



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