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

Hazardous Weather Conditions

Current conditions at

St. Joseph, Rosecrans Memorial Airport (KSTJ)

Lat: 39.77°NLon: 94.91°WElev: 823ft.

Partly Cloudy

68°F

20°C

Humidity 73%
Wind Speed E 5 mph
Barometer 30.01 in (1015.8 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 19 Jun 7:53 pm CDT
Extended Forecast for

Union Star MO

Flood Watch June 20, 07:00pm until June 21, 07:00pm
Click here for hazard details and duration
Flood Watch

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Light and variable wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers before 7am. Mostly sunny, with a high near 84. East wind 3 to 8 mph. Chance of precipitation is 10%.

    High: 84 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall. Low around 65. East southeast wind 9 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

    Low: 65 °F

    Chance
    T-storms then
    Heavy Rain

  • Sunday

    Sunday: Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Some of the storms could produce heavy rainfall. High near 77. East southeast wind around 17 mph becoming north in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    High: 77 °F

    Heavy Rain

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 59. North northeast wind 9 to 16 mph, with gusts as high as 23 mph.

    Low: 59 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Light and variable wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A slight chance of showers before 7am. Mostly sunny, with a high near 84. East wind 3 to 8 mph. Chance of precipitation is 10%.
Saturday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall. Low around 65. East southeast wind 9 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Sunday
Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Some of the storms could produce heavy rainfall. High near 77. East southeast wind around 17 mph becoming north in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Sunday Night
Mostly cloudy, with a low around 59. North northeast wind 9 to 16 mph, with gusts as high as 23 mph.
Monday
Mostly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Partly cloudy, with a low around 60.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
Partly sunny, with a high near 79.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 30%.
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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:
8:26 pm CDT Jun 19, 2026
Forecast Valid:
8pm CDT Jun 19, 2026-6pm CDT Jun 26, 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