Excessive Heat Continues for Washington State; Flooding Impacts Expected in the Southwest U.S.

Excessive heat will continue over central Washington through Friday with afternoon temperatures into the triple digits. In the Desert Southwest, monsoon activity will continue to generate localized flooding impacts in arroyos, slot canyons, and urban areas, as well as rapid rises on rivers, through this weekend. Flood Watches are widespread across Arizona and New Mexico for Friday and Saturday. Read More >

En Español

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

77°F

25°C

Humidity	56%
Wind Speed	N 3 mph
Barometer	30.04 in (1016.7 mb)
Dewpoint	60°F (16°C)
Visibility	10.00 mi
Heat Index	79°F (26°C)
Last update	17 Aug 7:54 pm CDT

More Information:

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

Extended Forecast for

Chesterfield MO

Tonight

Clear then
Patchy Fog
Low: 61 °F
Thursday

Patchy Fog
then Mostly
Sunny
High: 84 °F
Thursday
Night

Mostly Clear
Low: 64 °F
Friday

Sunny
High: 86 °F
Friday
Night

Mostly Clear
then Slight
Chance
T-storms
Low: 66 °F
Saturday

Slight Chance
T-storms then
Chance
T-storms
High: 86 °F
Saturday
Night

Chance
T-storms
Low: 67 °F
Sunday

Chance
Showers
High: 83 °F
Sunday
Night

Slight Chance
Showers
Low: 66 °F

Detailed Forecast

Tonight

Patchy fog after 3am. Otherwise, mostly clear, with a low around 61. Calm wind.

Thursday

Patchy fog before 9am. Otherwise, sunny, with a high near 84. Calm wind.

Thursday Night

Mostly clear, with a low around 64. Calm wind becoming south around 5 mph.

Friday

Sunny, with a high near 86. Light south wind.

Friday Night

A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 66. Southeast wind 3 to 5 mph. Chance of precipitation is 20%.

Saturday

A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 86.

Saturday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.

Sunday

A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 40%.

Sunday Night

A 20 percent chance of showers before 1am. Partly cloudy, with a low around 66.

Monday

A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.

Monday Night

Partly cloudy, with a low around 66.