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

Heavy Rainfall in the Southern Plains and Mississippi Valley; Thunderstorms in Eastern Colorado on Thursday

A multiple day heavy rainfall event will begin to set up from the Southern Plains into the Mississippi Valley Thursday, peaking in intensity over the holiday weekend. Widely scattered thunderstorms are expected to develop across eastern Colorado Thursday afternoon and evening. Large hail will be the primary hazard. Read More >

Current conditions at

Olympia, Olympia Airport (KOLM)

Lat: 46.97333°NLon: 122.90333°WElev: 203.0ft.

Clear

63°F

17°C

Humidity 59%
Wind Speed ENE 4 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 20 May 09:00 PM PDT
Extended Forecast for

4 Miles S Tumwater WA

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: Sunny, with a high near 79. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 48. North northwest wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 7am. Otherwise, sunny, with a high near 78. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 78 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 48. West southwest wind 3 to 8 mph.

    Low: 48 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of rain after 11pm. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 45. Calm wind.
Thursday
Sunny, with a high near 79. Calm wind becoming north northeast around 5 mph in the afternoon.
Thursday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 48. North northwest wind around 5 mph becoming calm in the evening.
Friday
Patchy fog before 7am. Otherwise, sunny, with a high near 78. Calm wind becoming northwest around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 48. West southwest wind 3 to 8 mph.
Saturday
Mostly sunny, with a high near 75.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Partly sunny, with a high near 70.
Sunday Night
A slight chance of rain after 11pm. Mostly cloudy, with a low around 46.
Memorial Day
Rain likely, mainly after 11am. Mostly cloudy, with a high near 59.
Monday Night
A chance of rain. Mostly cloudy, with a low around 42.
Tuesday
A chance of rain. Partly sunny, with a high near 65.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Mostly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Tumwater WA
 46.93°N 122.9°W (Elev. 200 ft)
Last Update:
12:25 pm PDT May 20, 2026
Forecast Valid:
9pm PDT May 20, 2026-6pm PDT May 27, 2026
 
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Additional Resources

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Chance of Precipitation