Areas of Severe Thunderstorms, Excessive Rainfall, and Extreme Heat Wednesday

In the Upper Midwest, heavy to excessive rain may bring flash and urban flooding through Wednesday. Scattered severe thunderstorms capable of large hail and damaging wind gusts are possible from the central High Plains into the Upper Midwest Wednesday. Extreme heat is ongoing over the Desert Southwest through Thursday. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Mount Vernon Airport (KMVN)

Lat: 38.33°NLon: 88.85°WElev: 466ft.

Fair

73°F

23°C

Humidity	96%
Wind Speed	Calm
Barometer	30.02 in (1016.4 mb)
Dewpoint	72°F (22°C)
Visibility	9.00 mi
Last update	8 Jul 2:56 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles SSE Dahlgren IL

Overnight
Low: 69 °F
Patchy Fog
Wednesday
High: 87 °F
Chance
T-storms and
Patchy Fog
Wednesday Night
Low: 70 °F
Slight Chance
T-storms then
Mostly Clear
Thursday
High: 93 °F
Sunny then
Chance
T-storms
Thursday Night
Low: 73 °F
Showers
Likely
Friday
High: 90 °F
Showers
Likely then
T-storms
Friday Night
Low: 71 °F
T-storms
Likely then
Showers
Likely
Saturday
High: 87 °F
Chance
T-storms then
Showers
Likely
Saturday Night
Low: 70 °F
Chance
T-storms

Detailed Forecast

Overnight

Patchy fog. Otherwise, mostly cloudy, with a low around 69. Calm wind.

Wednesday

A 40 percent chance of showers and thunderstorms, mainly after noon. Patchy fog before 8am. Otherwise, partly sunny, with a high near 87. Calm wind.

Wednesday Night

A 20 percent chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 70. Calm wind.

Thursday

A 30 percent chance of showers and thunderstorms, mainly after 4pm. Sunny, with a high near 93. Southwest wind 3 to 7 mph.

Thursday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 73. South wind around 6 mph. Chance of precipitation is 70%.

Friday

Showers and possibly a thunderstorm. High near 90. West southwest wind 5 to 7 mph. Chance of precipitation is 80%.

Friday Night

Showers and thunderstorms likely before 7pm, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 71. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.

Saturday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. Light west southwest wind.

Saturday Night

A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 70. Light and variable wind.

Sunday

A chance of showers and thunderstorms. Partly sunny, with a high near 87. Calm wind becoming north northeast around 6 mph in the morning.

Sunday Night

Partly cloudy, with a low around 69. North northeast wind around 5 mph becoming calm in the evening.

Monday

Sunny, with a high near 89. Calm wind becoming northeast around 5 mph in the afternoon.

Monday Night

Clear, with a low around 70. Northeast wind around 5 mph becoming calm in the evening.

Tuesday

Sunny, with a high near 91. Calm wind becoming northeast around 5 mph in the afternoon.