AgWeatherNet Weekly Weather Outlook Monday Update for March 29 to April 04, 2021

Calmer conditions to start the week, becoming mildly unsettled toward the weekend

Mark Ingalls, AgWeatherNet Intern

Synopsis:

A ridge building over the Western United States will allow for mostly sunny skies and a warming trend for much of the Pacific Northwest through Wednesday. Thursday, a weak cold front crosses Washington to bring breezy conditions in typical windy spots, but no precipitation is expected from this disturbance. Another weak front moves through Friday, this time dropping some light rain and mountain snow in and west of the Cascades. An upper level trough pushes over the region Sunday to keep unsettled weather in place into next week.

Discussion:

The cold front that produced strong winds across Washington Sunday (including a 100 mph gust on Rattlesnake Mountain near the Tri-Cities and a 143 mph gust at Camp Muir on Mount Rainier) is moving into the Plains. Behind it, weak northerly flow will briefly keep things cool. A ridge building across the Western third of the country cuts this cool flow off and initiates a warming trend that is expected to place parts of Western Washington into the 60s by Wednesday with warmer sections of Eastern Washington reaching the 70s by Thursday.

Thursday, a weak cold front quickly crosses the state to bring breezy conditions along the Strait of Juan de Fuca, in parts of the Puget Sound region, and much of Eastern Washington on Thursday. This front should have very little moisture embedded in it, so not even expecting notable snow in the mountains as a result. Another weak front moves through Friday. Instead of bringing widespread increased wind, this one may drop a few rain and mountain snow showers in and west of the Cascades.

A chance of rain and mountain snow continues through the weekend as an upper level trough moves over the region. This will keep temperatures somewhat cool (especially when compared to midweek). Heading into next week, a closed low forecasted to approach the Northern California coast may swing some moisture into the Inland Northwest. With cooler temperatures aloft under the larger trough, there may be enough instability for some convective showers and maybe some thunder Sunday and Monday.


Important Points About Next Week's Weather

South Central Washington
Remainder of the Week
  • Wind: Generally S and light, becoming W and breezy Thu. SW and light Fri.
  • Precipitation: Dry conditions expected.
  • High Temps: Mid 50s Tue, mid 60s Wed, low 70s Thu, upper 60s Fri.
  • Low Temps: Upper 20s Mon night, near 30 Tue night, low 40s Wed-Fri nights.
  • Sky Cover: Mostly clear Mon-Thu, mostly cloudy Fri.
Weekend
  • Wind: Generally SW and light.
  • Precipitation: Isolated rain Sun.
  • High Temps: Mid 60s Sat, low 60s Sun.
  • Low Temps: Low 40s Sat night, near 40 Sun night.
  • Sky Cover: Mostly cloudy.

North Central Washington
Remainder of the Week
  • Wind: Generally S and light, becoming W and breezy Thu. SW and light Fri.
  • Precipitation: Dry conditions expected.
  • High Temps: Mid 50s Tue, low 60s Wed, mid 60s Thu, near 60 Fri. Cooler in higher terrain.
  • Low Temps: Mid 20s Mon night, near 30 Tue night, upper 30s Wed night, near 40 Thu-Fri nights. Cooler in higher terrain.
  • Sky Cover: Clear to partly cloudy.
Weekend
  • Wind: Generally SW and light.
  • Precipitation: Low chance of rain and mountain snow Sun.
  • High Temps: Near 60 Sat-Sun. Cooler in higher terrain.
  • Low Temps: Near 40 Sat night, upper 30s Sun night. Cooler in higher terrain.
  • Sky Cover: Mostly cloudy.

Eastern Washington
Remainder of the Week
  • Wind: Generally S through Wed with breezy areas Tue, becoming W and breezy Thu. SW and light Fri.
  • Precipitation: Dry conditions expected.
  • High Temps: Low 50s Tue, low 60s Wed, mid 60s Thu, near 60 Fri. Warmer in the Lewis & Clark Valley.
  • Low Temps: Mid 20s Mon night, upper 20s Tue night, mid 30s Wed-Fri nights. Warmer in the Lewis & Clark Valley.
  • Sky Cover: Clear to partly cloudy through Wed, partly to mostly cloudy Thu-Fri.
Weekend
  • Wind: Generally SW and light.
  • Precipitation: Low chance of rain Sun.
  • High Temps: Low 60s Sat, upper 50s Sun. Warmer in the Lewis & Clark Valley.
  • Low Temps: Mid 30s Sat & Sun nights. Warmer in the Lewis & Clark Valley.
  • Sky Cover: Mostly cloudy.

Western Washington
Remainder of the Week
  • Wind: Generally light and variable through Wed, becoming W with breezy areas Thu, light and variable Fri.
  • Precipitation: Low chance of rain and mountain snow Thu night-Fri.
  • High Temps: Mid 50s Tue, near 60 Wed, mid 50s Thu-Fri. Cooler in higher terrain.
  • Low Temps: Mid 30s Mon night, upper 30s Tue night, near 40 Wed-Fri nights. Cooler in higher terrain.
  • Sky Cover: Mostly clear through Wed, mostly cloudy Thu-Fri.
Weekend
  • Wind: Generally S with a few breezy areas.
  • Precipitation: Chance of rain and mountain snow.
  • High Temps: Mid 50s Sat-Sun. Cooler in higher terrain.
  • Low Temps: Near 40 Sat & Sun nights. Cooler in higher terrain.
  • Sky Cover: Mostly cloudy to overcast.

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