Active Weather Pattern for the West into the Plains

A strong Pacific storm continues to track across the Great Basin. Heavy snow is expected across the higher elevations and heavy rain across lower terrain. Strong gusty winds will make for additional hazards for travelers. These winds will bring increasing fire weather concerns for the southern High Plains. Then we will closely watch for severe thunderstorms across the central Plains on Monday. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Partly Cloudy

70°F

21°C

Humidity	66%
Wind Speed	Calm
Barometer	29.99 in (1015.3 mb)
Dewpoint	58°F (14°C)
Visibility	10.00 mi
Last update	5 May 5:53 pm CDT

More Information:

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

Extended Forecast for

O'Fallon IL

Tonight
Low: 60 °F
Showers
Likely
Monday
High: 77 °F
Chance
Showers then
Slight Chance
T-storms
Monday Night
Low: 63 °F
Mostly Cloudy
then Showers
Tuesday
High: 83 °F
Showers
Tuesday Night
Low: 60 °F
Slight Chance
T-storms
Wednesday
High: 81 °F
Chance
Showers then
T-storms
Wednesday Night
Low: 59 °F
T-storms
Likely
Thursday
High: 75 °F
Sunny
Thursday Night
Low: 53 °F
Mostly Clear

Detailed Forecast

Tonight

A chance of showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a chance of showers and thunderstorms after 4am. Cloudy, with a low around 60. East wind 3 to 6 mph. Chance of precipitation is 60%.

Monday

A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly cloudy, with a high near 77. East wind 3 to 7 mph.

Monday Night

A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Low around 63. Southeast wind 7 to 11 mph. Chance of precipitation is 80%.

Tuesday

Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. High near 83. South wind 10 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 80%.

Tuesday Night

A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 60. West wind 6 to 8 mph becoming south after midnight.

Wednesday

A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. High near 81. Chance of precipitation is 80%.

Wednesday Night

Showers and thunderstorms likely, mainly before 7pm. Partly cloudy, with a low around 59. Chance of precipitation is 60%.

Thursday

Sunny, with a high near 75.

Thursday Night

Mostly clear, with a low around 53.

Friday

A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 68. Chance of precipitation is 30%.

Friday Night

Mostly clear, with a low around 50.

Saturday

A 20 percent chance of showers and thunderstorms. Sunny, with a high near 70.