National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Dangerous Heat and Heavy Rain with Possible Flooding This Week

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley through this week. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

84°F

29°C

Humidity 65%
Wind Speed S 7 mph
Barometer 30.08 in (1017.6 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 15 Sep 11:54 pm CDT
Extended Forecast for

Pacific MO

Heat Advisory September 16, 12:25am until September 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 16, 12:25am until September 18, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Overnight

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 96. Heat index values as high as 109. Calm wind. Chance of precipitation is 30%.

    High: 96 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 72. Calm wind.

    Low: 72 °F

    Chance
    Showers then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 96. Heat index values as high as 106. Calm wind.

    High: 96 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 96.

    High: 96 °F

    Mostly Sunny

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 30%.
Wednesday
A chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 96. Heat index values as high as 109. Calm wind. Chance of precipitation is 30%.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 72. Calm wind.
Thursday
Sunny, with a high near 96. Heat index values as high as 106. Calm wind.
Thursday Night
Partly cloudy, with a low around 71. Calm wind.
Friday
Sunny, with a high near 96.
Friday Night
Partly cloudy, with a low around 71.
Saturday
Mostly sunny, with a high near 96.
Saturday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 70.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Monday
A 40 percent chance of showers. Mostly cloudy, with a high near 81.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 61.
Tuesday
A 20 percent chance of showers. Partly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Pacific MO
 38.48°N 90.75°W (Elev. 486 ft)
Last Update:
10:21 pm CDT Sep 15, 2026
Forecast Valid:
12am CDT Sep 16, 2026-6pm CDT Sep 22, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation