Severe Weather Across the Northern Tier of the Country; Heat Builds Across the Center of the Nation

A frontal boundary will focus the threat for showers and thunderstorms, some severe, across the northern tier of the country through Tuesday. Meanwhile, dangerous heat will expand across the center of the nation through at least the middle of the week. Elevated to critical fire weather conditions will persist across the Great Basin, portions of the Plains and interior Alaska. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Regional Airport (KALN)

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

Partly Cloudy

93°F

34°C

Humidity	53%
Wind Speed	S 9 mph
Barometer	29.96 in
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	103°F (39°C)
Last update	4 Jul 5:50 pm CDT

More Information:

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

Detailed forecast for

Macoupin County

Tonight

Mostly clear. Lows in the mid 70s to lower 80s. Highest heat index readings of around 100 early in the evening. South winds around 10 mph.

Tuesday

Very hot and humid. Sunny. Highs 96 to 101. Highest heat index readings of around 109 in the late morning and afternoon. Southwest winds around 10 mph.

Tuesday Night

Mostly clear. Lows in the upper 70s. Highest heat index readings of around 109 early in the evening. South winds around 10 mph in the evening becoming light after midnight.

Wednesday

Very hot and humid. Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Highs 96 to 101. Highest heat index readings of around 109 in the afternoon. Southwest winds around 10 mph.

Wednesday Night

Partly cloudy with a 30 percent chance of showers and thunderstorms. Lows in the mid 70s to lower 80s. Highest heat index readings of around 108 early in the evening. Light wind.

Thursday

Hot and humid. Partly cloudy with a 30 percent chance of showers and thunderstorms. Highs in the upper 90s. Highest heat index readings of around 109 in the afternoon.

Thursday Night

Partly cloudy with a 30 percent chance of showers and thunderstorms. Lows in the mid 70s. Highest heat index readings of around 106 in the evening.

Friday And Friday Night

Partly cloudy with a 40 percent chance of showers and thunderstorms. Highs in the mid 90s. Lows in the lower 70s. Around 105.

Saturday

Partly cloudy with a 30 percent chance of showers and thunderstorms. Highs in the upper 80s.

Saturday Night Through Sunday Night

Clear. Lows in the upper 60s. Highs around 90.

Monday

Partly cloudy. Highs in the lower 90s.