Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Current conditions at

Sterling Municipal Airport (KSTK)

Lat: 40.61°NLon: 103.26°WElev: 4026ft.

Partly Cloudy

41°F

5°C

Humidity 76%
Wind Speed N 10 mph
Barometer 30.14 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 18 May 11:15 pm MDT
Extended Forecast for

4 Miles NNE Union CO

Frost Advisory May 19, 12:00am until May 19, 08:00am
Click here for hazard details and duration
Frost Advisory
  • Tonight

    Tonight: Mostly cloudy, with a low around 33. North wind 5 to 10 mph, with gusts as high as 17 mph.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. Northwest wind 5 to 7 mph becoming light and variable.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after midnight.  Mostly cloudy, with a low around 39. East northeast wind 6 to 8 mph becoming south after midnight. Winds could gust as high as 16 mph.

    Low: 39 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 3pm.  Mostly cloudy, with a high near 61. Breezy, with a south southeast wind 9 to 18 mph, with gusts as high as 31 mph.  Chance of precipitation is 50%.

    High: 61 °F

    Chance
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight.  Mostly cloudy, with a low around 38. South southeast wind 7 to 13 mph, with gusts as high as 23 mph.  Chance of precipitation is 50%.

    Low: 38 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 68. Chance of precipitation is 60%.

    High: 68 °F

    Partly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm.  Low around 40. Chance of precipitation is 80%.

    Low: 40 °F

    Showers

  • Friday

    Friday: A chance of showers and thunderstorms.  Partly sunny, with a high near 68.

    High: 68 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers before midnight.  Partly cloudy, with a low around 40.

    Low: 40 °F

    Slight Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 33. North wind 5 to 10 mph, with gusts as high as 17 mph.
Tuesday
Mostly sunny, with a high near 58. Northwest wind 5 to 7 mph becoming light and variable.
Tuesday Night
A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 39. East northeast wind 6 to 8 mph becoming south after midnight. Winds could gust as high as 16 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 61. Breezy, with a south southeast wind 9 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 38. South southeast wind 7 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Thursday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 68. Chance of precipitation is 60%.
Thursday Night
Showers and possibly a thunderstorm. Low around 40. Chance of precipitation is 80%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 68.
Friday Night
A slight chance of showers before midnight. Partly cloudy, with a low around 40.
Saturday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 44.
Sunday
Sunny, with a high near 84.
Sunday Night
Mostly clear, with a low around 47.
Memorial Day
Sunny, with a high near 86.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Union CO
 40.4°N 103.46°W (Elev. 4091 ft)
12:46 pm MDT May 18, 2026
11pm MDT May 18, 2026-6pm MDT May 25, 2026
 
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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