Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fog/Mist

70°F

21°C

Humidity	94%
Wind Speed	NW 14 mph
Barometer	29.73 in
Dewpoint	68°F (20°C)
Visibility	4.00 mi
Last update	1 Aug 8:50 pm CDT

More Information:

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

Extended Forecast for

3 Miles NNW Donnellson IL

Tonight
Low: 66 °F
Showers
Likely
Sunday
High: 79 °F
Mostly Cloudy
then Slight
Chance
Drizzle
Sunday Night
Low: 63 °F
Mostly Clear
Monday
High: 82 °F
Sunny
Monday Night
Low: 62 °F
Mostly Clear
Tuesday
High: 83 °F
Sunny
Tuesday Night
Low: 64 °F
Mostly Clear
Wednesday
High: 84 °F
Sunny
Wednesday Night
Low: 66 °F
Partly Cloudy
then Chance
T-storms

Detailed Forecast

Tonight

Showers likely and possibly a thunderstorm before midnight, then a chance of showers between midnight and 1am, then a chance of drizzle after 1am. Cloudy, with a low around 66. North wind 11 to 14 mph. Chance of precipitation is 70%.

Sunday

A slight chance of drizzle before 4pm, then a slight chance of drizzle after 5pm. Partly sunny, with a high near 79. North wind around 15 mph, with gusts as high as 24 mph.

Sunday Night

Mostly clear, with a low around 63. North wind 5 to 10 mph becoming light after midnight.

Monday

Sunny, with a high near 82. North wind 3 to 5 mph.

Monday Night

Mostly clear, with a low around 62. Light east wind.

Tuesday

Sunny, with a high near 83.

Tuesday Night

Mostly clear, with a low around 64.

Wednesday

Sunny, with a high near 84.