Mount Vernon, Illinois Weather Conditions
Severe Weather Alerts
Next 12 Hours
5 Day Forecast
- Monday
-
- High: 77 °
- Low: 50 °
- Partly Cloudy
- Tuesday
-
- High: 77 °
- Low: 52 °
- Clear
- Wednesday
-
- High: 84 °
- Low: 57 °
- Clear
- Thursday
-
- High: 91 °
- Low: 66 °
- Clear
- Friday
-
- High: 91 °
- Low: 66 °
- Clear
Forecast for Mount Vernon, Illinois
Updated: 10:00 AM CDT on May 21, 2012

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Monday
Partly cloudy. High of 77F. Winds from the NW at 10 to 15 mph. Chance of rain 20%.

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Monday Night
Partly cloudy in the evening, then clear. Low of 50F. Winds from the NW at 5 to 10 mph.

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Tuesday
Clear. High of 77F. Winds from the North at 5 to 15 mph.

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Tuesday Night
Clear. Low of 52F. Winds less than 5 mph.

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Wednesday
Clear. High of 84F. Winds from the SSE at 5 to 10 mph.

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Wednesday Night
Clear. Low of 57F. Winds from the SSE at 5 to 10 mph.

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Thursday
Clear. High of 91F. Winds from the South at 10 to 15 mph.

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Thursday Night
Clear. Low of 66F. Winds from the South at 10 to 15 mph.

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Friday
Clear. High of 91F. Winds from the SSW at 10 to 15 mph.

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Friday Night
Partly cloudy. Low of 66F. Winds from the SSW at 5 to 10 mph.

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Saturday
Clear. High of 97F. Winds less than 5 mph.

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Saturday Night
Partly cloudy. Low of 70F. Winds from the ESE at 5 to 10 mph.

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Sunday
Clear. High of 95F with a heat index of 100F. Winds from the SE at 5 to 10 mph.

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Sunday Night
Partly cloudy with a chance of a thunderstorm. Low of 73F. Winds from the SE at 5 to 10 mph. Chance of rain 20%.

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Monday
Partly cloudy with a chance of a thunderstorm. High of 93F with a heat index of 102F. Winds from the South at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.2 in. possible.

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Monday Night
Partly cloudy with a chance of a thunderstorm. Low of 73F. Winds from the South at 5 to 10 mph. Chance of rain 40%.

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Tuesday
Partly cloudy with a chance of a thunderstorm. High of 91F. Winds from the WSW at 5 to 10 mph. Chance of rain 40%.

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Tuesday Night
Partly cloudy with a chance of a thunderstorm. Low of 70F. Winds less than 5 mph. Chance of rain 40%.

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Wednesday
Partly cloudy with a chance of a thunderstorm. High of 86F with a heat index of 104F. Winds less than 5 mph. Chance of rain 40%.

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Wednesday Night
Partly cloudy with a chance of a thunderstorm. Low of 66F. Winds less than 5 mph. Chance of rain 40%.

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Thursday
Partly cloudy with a chance of a thunderstorm. High of 84F. Winds less than 5 mph. Chance of rain 40%.

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Thursday Night
Clear. Low of 66F. Winds less than 5 mph. Chance of rain 30%.
Severe Weather Alert Descriptions
Local Storm Report
05/20/2012 0544 PM
Mount Vernon, Jefferson County.
Hail e0.88 inch, reported by trained spotter.
Nickel hail se side of Mt Vernon.
05/20/2012 0545 PM
Mount Vernon, Jefferson County.
Hail e1.00 inch, reported by trained spotter.
Quarter hail in Mt Vernon.
05/20/2012 0602 PM
2 miles S of Mount Vernon, Jefferson County.
Flash flood, reported by trained spotter.
Water over the Road - 2 to 3 inches. Hwy 37 - 2 mi S of
Mt Vernon.
05/20/2012 0523 PM
1 miles NE of Mount Vernon, Jefferson County.
Hail e0.75 inch, reported by trained spotter.
Dime size hail reported which lasted for ten minutes.
05/20/2012 0520 PM
Mount Vernon, Jefferson County.
Hail e0.25 inch, reported by trained spotter.
Pea size hail and strong winds of 40 to 50 mph.
Personal Weather Stations
Personal Weather Stations [Add your weather station!]
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Location: MesoWest Kell IL US UPR, Dix, IL Updated: 11:00 AM CDT |
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| Temperature: 62 °F | Dew Point: - | Humidity: - | Wind: Calm | Pressure: - | Hourly Precipitation: 0.00 in | Heat Index: - | Graphs |
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Location: W9AEG, Centralia, IL Updated: 12:19 PM CDT |
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| Temperature: 69.4 °F | Dew Point: 57 °F | Humidity: 64% | Wind: NNE at 7.0 mph | Pressure: 30.08 in | Hourly Precipitation: 0.00 in | Heat Index: - | Graphs |
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Location: DuBois, IL Updated: 12:19 PM CDT |
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| Temperature: 69.5 °F | Dew Point: - | Humidity: - | Wind: Calm | Pressure: 30.09 in | Hourly Precipitation: 0.00 in | Heat Index: - | Graphs |
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Location: Holiday Terrace, Centralia, IL Updated: 12:16 PM CDT |
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| Temperature: 70.0 °F | Dew Point: 58 °F | Humidity: 65% | Wind: NNE at 1.0 mph | Pressure: 30.08 in | Hourly Precipitation: 0.00 in | Heat Index: - | Graphs |
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Location: Northeast of Benton, Benton, IL Updated: 12:18 PM CDT |
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| Temperature: 71.8 °F | Dew Point: 58 °F | Humidity: 63% | Wind: NW at 6.0 mph | Pressure: 30.08 in | Hourly Precipitation: 0.00 in | Heat Index: 76 °F | Graphs |
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Location: Department of Emergency Management, Salem, IL Updated: 12:19 PM CDT |
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| Temperature: 69.6 °F | Dew Point: 48 °F | Humidity: 46% | Wind: NNE at 5.0 mph | Pressure: 29.60 in | Hourly Precipitation: 0.00 in | Heat Index: - | Graphs |
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Location: Middleton Street Weather, Iuka, IL Updated: 12:19 PM CDT |
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| Temperature: 70.3 °F | Dew Point: 58 °F | Humidity: 65% | Wind: West at 6.9 mph | Pressure: 29.75 in | Hourly Precipitation: 0.00 in | Heat Index: 75 °F | Graphs |
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Location: Buckner, IL Updated: 12:19 PM CDT |
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| Temperature: 70.1 °F | Dew Point: 58 °F | Humidity: 65% | Wind: NW at 7.5 mph | Pressure: 30.07 in | Hourly Precipitation: 0.00 in | Heat Index: 75 °F | Graphs |
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MSN Maps of: |
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| Temp: | Dew Point: | Humidity | Wind | Pressure | Hr Precip | - | |
NWS Forecaster Discussion
Area forecast discussion National Weather Service Paducah Kentucky 620 am CDT Monday may 21 2012 Update... issued at 620 am CDT Monday may 21 2012 Update to the aviation section. && Short term...(today through tuesday) issued at 256 am CDT Monday may 21 2012 Difficult to determine exactly where the cold front is due to convective outflows from previous convection but more than likely runs from mvn to pof. Things are essentially dry across the County Warning Area right now...but with plenty of moisture still around will keep isolated/scattered wording until the drier air moves in. Have seen isolated convection behind the boundary so followed the deep layer 1000-500 relative humidity averages from the models to determine the ending of precipitation. By tonight high pressure should be well in control. Very dry air behind this front with dew points in the 30s and 40s in the Central Plains. With this in mind...plus forecast soundings...have lowered dew points through the period starting tonight. Afternoon relative humidity values will be in the 30 percent range (at least) Tuesday and Wednesday so what little rain most of US got yesterday will quickly evaporate out of the soil. Long term...(thursday through sunday) issued at 256 am CDT Monday may 21 2012 Models maintain building an upper level high over the region through the period...which will result in dry and unseasonably warm weather. The GFS hints at isolated convection by Sunday into Monday whereas the European model (ecmwf) holds out a little longer. These conditions will only serve to maintain or increase short term drought conditions across the area. We went lower than guidance on afternoon dew points given model sounding depictions. && Aviation...(for the 12z tafs through 12z Tuesday morning) issued at 620 am CDT Monday may 21 2012 Spotty MVFR visibilities should jump back to p6sm once north-northwest winds kick up this morning behind a cold front that will move across the region. Middle and high clouds will persist for a good part of the morning and early afternoon...with scattered VFR clouds below. Not enough of a chance of precipitation to include in the tafs at this time. Winds will let up tonight. && Pah watches/warnings/advisories... Illinois...none. MO...none. In...none. Kentucky...none. && $$ Short term...plus long term....cn aviation...cn


