Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Heat Advisory until September 19, 08:00 PM CDT

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

71°F

22°C

Humidity	92%
Wind Speed	Calm
Barometer	29.96 in
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Last update	19 Sep 4:35 am CDT

More Information:

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

Extended Forecast for

East Alton IL

Heat Advisory September 19, 04:57am until September 19, 08:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory September 19, 04:57am until September 19, 08:00pm
NOW until 8:00pm Sat
Heat Advisory
Today
High: 99 °F
Hot
Tonight
Low: 73 °F
Partly Cloudy
Sunday
High: 93 °F
Chance
Showers then
Slight Chance
T-storms
Sunday Night
Low: 66 °F
Chance
T-storms then
Showers
Likely
Monday
High: 79 °F
Showers
Likely
Monday Night
Low: 59 °F
Slight Chance
Showers
Tuesday
High: 73 °F
Partly Sunny
Tuesday Night
Low: 54 °F
Mostly Cloudy

Detailed Forecast

Today

Partly sunny and hot, with a high near 99. Light and variable wind becoming west 5 to 8 mph in the morning.

Tonight

Partly cloudy, with a low around 73. Light and variable wind becoming south around 5 mph after midnight.

Sunday

A chance of showers before noon, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 93. Northwest wind 3 to 7 mph. Chance of precipitation is 30%.

Sunday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Northeast wind 6 to 11 mph. Chance of precipitation is 60%.

Monday

Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 79. Northeast wind 7 to 11 mph. Chance of precipitation is 70%.

Monday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 59.

Tuesday

Partly sunny, with a high near 73.

Tuesday Night

Mostly cloudy, with a low around 54.

Wednesday

Mostly sunny, with a high near 75.

Wednesday Night

Partly cloudy, with a low around 55.

Thursday

Mostly sunny, with a high near 78.