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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Yakima Air Terminal - McAllister Field (KYKM)

Lat: 46.56402°NLon: 120.53484°WElev: 1043.0ft.

Clear

43°F

6°C

Humidity 48%
Wind Speed N 10 MPH
Barometer 30.27 in (1025.06 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 21 Mar 10:55 PM PDT
Extended Forecast for

Union Gap WA

Flood Warning March 21, 11:24pm until March 22, 09:00am
Click here for hazard details and duration
Flood Warning
  •  
    Flood Warning March 21, 11:24pm until March 22, 09:00am

    NOW until 9:00am Sun

    Flood Warning

  • Tonight

    Low: 30 °F

    Patchy Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, increasing clouds, with a high near 57. Light and variable wind.

    High: 57 °F

    Areas Frost
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 34. Light and variable wind.

    Low: 34 °F

    Mostly Cloudy

  • Monday

    Monday: Increasing clouds, with a high near 60. Light and variable wind.

    High: 60 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Cloudy, with a low around 43. Light and variable wind.

    Low: 43 °F

    Cloudy

  • Tuesday

    Tuesday: Rain likely. Mostly cloudy, with a high near 60. Chance of precipitation is 70%.

    High: 60 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

Detailed Forecast

Tonight
Patchy frost after 2am. Otherwise, clear, with a low around 30. Northwest wind around 6 mph.
Sunday
Areas of frost before 8am. Otherwise, increasing clouds, with a high near 57. Light and variable wind.
Sunday Night
Mostly cloudy, with a low around 34. Light and variable wind.
Monday
Increasing clouds, with a high near 60. Light and variable wind.
Monday Night
Cloudy, with a low around 43. Light and variable wind.
Tuesday
Rain likely. Mostly cloudy, with a high near 60. Chance of precipitation is 70%.
Tuesday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 37.
Wednesday
Mostly sunny, with a high near 59.
Wednesday Night
Mostly clear, with a low around 31.
Thursday
Sunny, with a high near 55.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 59.
Friday Night
Mostly clear, with a low around 34.
Saturday
Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Union Gap WA
 46.54°N 120.47°W (Elev. 997 ft)
Last Update:
11:02 pm PDT Mar 21, 2026
Forecast Valid:
11pm PDT Mar 21, 2026-6pm PDT Mar 28, 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