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

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Hazardous Weather Conditions

Current conditions at

St. Joseph, Rosecrans Memorial Airport (KSTJ)

Lat: 39.77°NLon: 94.91°WElev: 823ft.

Fair

82°F

28°C

Humidity 53%
Wind Speed S 10 mph
Barometer 29.75 in (1006.7 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 12 Oct 7:53 pm CDT
Extended Forecast for

Union Star MO

  • Tonight

    Tonight: Mostly clear, with a low around 64. South southwest wind 5 to 11 mph becoming north northwest after midnight. Winds could gust as high as 21 mph.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, mainly after 5pm. Sunny, with a high near 85. Light and variable wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Sunny then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms before 10pm, then showers and possibly a thunderstorm, mainly after 10pm. Low around 60. North northeast wind around 8 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 60 °F

    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, with a high near 70. North northeast wind 9 to 11 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 70 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 59. East northeast wind 6 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Slight Chance
    T-storms then
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 72. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 72 °F

    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 48. Breezy.

    Low: 48 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Friday

    Friday: Mostly sunny, with a high near 60. Breezy.

    High: 60 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 64. South southwest wind 5 to 11 mph becoming north northwest after midnight. Winds could gust as high as 21 mph.
Tuesday
A chance of showers and thunderstorms, mainly after 5pm. Sunny, with a high near 85. Light and variable wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and thunderstorms before 10pm, then showers and possibly a thunderstorm, mainly after 10pm. Low around 60. North northeast wind around 8 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, with a high near 70. North northeast wind 9 to 11 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 59. East northeast wind 6 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and possibly a thunderstorm. High near 72. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Mostly cloudy, with a low around 48. Breezy.
Friday
Mostly sunny, with a high near 60. Breezy.
Friday Night
Mostly clear, with a low around 35.
Saturday
Sunny, with a high near 62.
Saturday Night
Mostly clear, with a low around 42.
Sunday
Mostly sunny, with a high near 69.
Sunday Night
Partly cloudy, with a low around 49.
Monday
Mostly sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Union Star MO
 39.99°N 94.6°W (Elev. 958 ft)
Last Update:
6:11 pm CDT Oct 12, 2026
Forecast Valid:
8pm CDT Oct 12, 2026-6pm CDT Oct 19, 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