The Weather Hazard Threefold

A large dome of high pressure will continue the sweltering heat in parts of the West and the central Plains. Meanwhile, a cold front will produce severe thunderstorms, capable of all hazards, the next few days from the Mid-Upper Mississippi Valley into the Ohio Valley and Great Lakes. Finally, Potential Tropical Cyclone Three will bring heavy rain and flooding to the northern Gulf Coast. Read More >

Hazardous Weather Conditions

Heat Advisory in effect from June 18, 01:00 PM CDT until June 18, 07:00 PM CDT

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89° N Lon: 90.03° W Elev: 518 ft.

Fair

84°F

29°C

Humidity	70%
Wind Speed	SE 8 mph
Barometer	29.91 in
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	90°F (32°C)
Last update	17 Jun 8:50 pm CDT

More Information:

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

Detailed forecast for

Macoupin County

Tonight

Warmer. Mostly clear. Low in the mid 70s. South wind around 10 mph.

Friday

Hot and humid. Mostly sunny. A 20 percent chance of showers and thunderstorms in the afternoon. High around 100. Highest heat index readings of around 106 in the late morning and afternoon. Southwest wind 10 to 15 mph with gusts to around 25 mph.

Friday Night

Partly cloudy with a 40 percent chance of showers and thunderstorms. Low in the mid 70s. Highest heat index readings of around 100 early in the evening. Southwest wind around 10 mph.

Saturday

Hot. Partly cloudy with a 30 percent chance of showers and thunderstorms. High in the 90s. Southwest wind around 10 mph.

Saturday Night

Partly cloudy with a 20 percent chance of showers and thunderstorms. Low in the lower 70s. Light wind.

Sunday

Partly cloudy with a 30 percent chance of showers and thunderstorms. High in the mid 90s.

Sunday Night

Partly cloudy with a 40 percent chance of showers and thunderstorms. Low in the lower 70s.

Monday And Monday Night

Partly cloudy. A 30 percent chance of showers and thunderstorms. High in the mid 80s. Low in the mid 50s.

Tuesday Through Wednesday

Mostly clear. High in the upper 70s. Low in the mid 50s.