AgWeatherNet Weekly Weather Outlook Monday Update for 24 May to 30 May 2021

Intermittently wet week, drying for the weekend

Mark Ingalls, AgWeatherNet Intern

Synopsis:

A cold front crossing the state Monday and Tuesday brings with it light rain showers. Nearly the entire state has a chance of rain but precipitation values should be light. Wednesday a weak ridge transits the area before a disturbance similar to that seen at the start of the work week moves in. Rain chances pick up from west to east beginning Wednesday night spreading east of the Cascades Thursday. A few leftover showers are possible in and west of the Cascades Friday but heading into the weekend a ridge of high pressure building along the coast is expected to lead to drier and warmer conditions.

Discussion:

Showery weather continues into Tuesday as a cold front and associated upper level trough cross Washington. While rain chances even extend into the Columbia Basin, precipitation values are forecasted to be quite light. Most areas aren't likely to exceed a tenth of an inch of rain though the windward side of the Cascades toward the Oregon border may get close to half an inch. This is far from what is needed to clear drought conditions.

A break in the rain comes Tuesday night into Wednesday as a weak ridge moves through. Partly cloudy skies will result in the Columbia Basin and surrounding areas with mostly cloudy skies elsewhere. Rain begins moving in again Wednesday night as the next low pressure system and associated cold front moves in. The cold front makes landfall Thursday morning, moving eastward during the day. Much like the first system, while rain chances extend throughout Washington precipitation values are likely to be low. Also of note this week will be the wind. The continually unsettled weather is likely to keep wind speeds elevated in typical windy locations through Friday with possible easing Wednesday. This includes the Strait of Juan de Fuca, Kittitas Valley, Columbia Gorge and Columbia Basin.

A few showers linger in and west of the Cascades as well as along the Idaho border on Friday but otherwise a drying and warming trend is expected into the weekend. Upper level ridging is forecast as the low continues eastward, strengthening toward the beginning of next week. It seems reasonable to suggest highs may get close to 90 by Sunday in the hottest parts of Washington. Model guidance keeps the warming trend going for Memorial Day and beyond, but details are a bit more vague for that period.


Important Points About Next Week's Weather

South Central Washington
Remainder of the Week
  • Wind: SW/W and breezy. Strongest winds mainly in the afternoons.
  • Precipitation: Chance of rain Tue & Thu.
  • High Temps: Mid 70s Tue, near 80 Wed, mid 70s Thu, low 70s Fri.
  • Low Temps: Mid 50s Mon night, near 50 Tue night, low 50s Wed night, near 50 Thu night, mid 40s Fri night.
  • Sky Cover: Mostly cloudy Tue, partly cloudy Wed, mostly cloudy Thu, partly cloudy Fri.
Weekend
  • Wind: Generally NE, breezy areas Sat.
  • Precipitation: Dry conditions expected.
  • High Temps: Near 80 Sat, upper 80s Sun.
  • Low Temps: Near 50 Sat night, low 50s Sun night.
  • Sky Cover: Clear.

North Central Washington
Remainder of the Week
  • Wind: SW/W with breezy areas. Strongest winds mainly in the afternoons.
  • Precipitation: Lowland rain showers Tue & Thu. Upslope showers also possible Wed.
  • High Temps: Near 70 Tue, mid 70s Wed, near 70 Thu & Fri. Cooler in higher terrain.
  • Low Temps: Low 50s Mon night, near 50 Tue night, mid 50s Wed night, near 50 Thu night, mid 40s Fri night. Cooler in higher terrain.
  • Sky Cover: Mostly cloudy Tue, partly cloudy Wed, mostly cloudy Thu, partly cloudy Fri.
Weekend
  • Wind: Generally NE, breezy areas Sat.
  • Precipitation: Dry conditions expected.
  • High Temps: Upper 70s Sat, mid 80s Sun. Cooler in higher terrain.
  • Low Temps: Low 50s Sat night, mid 50s Sun night. Cooler in higher terrain.
  • Sky Cover: Clear.

Eastern Washington
Remainder of the Week
  • Wind: SW/W and breezy. Strongest winds mainly in the afternoons.
  • Precipitation: Rain showers Tue, Thu, and Fri.
  • High Temps: Upper 60s Tue, low 70s Wed, mid 70s Thu, mid 60s Fri. Warmer in the Lewis & Clark Valley.
  • Low Temps: Near 50 Mon night, mid 40s Tue night, upper 40s Wed night, mid 40s Thu night, low 40s Fri night. Warmer in the Lewis & Clark Valley.
  • Sky Cover: Mostly cloudy Tue, partly cloudy Wed, mostly cloudy Thu-Fri.
Weekend
  • Wind: Generally NE, breezy areas Sat.
  • Precipitation: Dry conditions expected.
  • High Temps: Near 70 Sat, near 80 Sun. Warmer in the Lewis & Clark Valley.
  • Low Temps: Mid 40s Sat night, upper 40s Sun night. Warmer in the Lewis & Clark Valley.
  • Sky Cover: Clear.

Western Washington
Remainder of the Week
  • Wind: Generally SW/W with periodic breezy areas. Widespread breezy to windy Thu.
  • Precipitation: Rain showers Tue, Thu, and Fri.
  • High Temps: Mid 60s Tue, upper 60s Wed, low 60s Thu-Fri. Cooler in higher terrain.
  • Low Temps: Near 50 Mon-Fri nights. Cooler in higher terrain.
  • Sky Cover: Mostly cloudy to overcast.
Weekend
  • Wind: N with breezy areas Sat, light and variable for most Sun.
  • Precipitation: Dry conditions expected.
  • High Temps: Upper 60s Sat, mid 70s Sun. Cooler in higher terrain.
  • Low Temps: Near 50 Sat night, low 50s Sun night. Cooler in higher terrain.
  • Sky Cover: Partly cloudy.

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