AgWeatherNet Weekly Weather Outlook Monday Update for Mar 23 to Mar 29, 2020

Unsettled weather for much of the week and weekend

Craig Oswald, Field Meteorologist, 509-786-9256

Discussion:

A weak disturbance off the coast of British Columbia that is bringing rain showers to western Washington, mountain snow showers through the Cascades and Olympics, and a chance for rain and upland rain/snow showers through eastern Washington looks to continue to move inland over the next few days. This is expected to keep weather conditions rather unsettled early in the week statewide. Western Washington looks to remain under rain and mountain snow showers through Wednesday. Eastern Washington will continue to maintain a chance for scattered lowland rain and upland rain/snow showers through Wednesday with a slightly greater chance for any such activity through northern and far eastern Washington. Snow accumulations near pass levels in the Cascades look to be only a couple of inches through the beginning of the week. Little to no accumulation is anticipated for upland areas of northern and eastern Washington. Conditions are anticipated to trend dry through Wednesday night with Thursday expected to be dry statewide. However, this dry period looks to be short lived as the next disturbance looks to start bringing a similar round of showers into the state from the northwest Thursday evening. Precipitation is expected to persist through the weekend in western Washington with scattered showers again anticipated for eastern Washington, mainly in the northern and far eastern parts of the region.

As the current disturbance continues to move inland, a bit of cooler air is expected to move in behind it. Wednesday night looks to be the coldest night of the week and general temperature expectations can be found in the regional breakdowns below. Low lying areas have the possibility of reaching slightly colder than forecasted temperatures as the cooler air moving into the state will have a natural tendency to pool in these areas. Light winds and partly to mostly cloudy skies through much of the week are anticipated to keep any major surface inversion formation at bay. However, one or two of the hi-res models still seem to indicate the formation of weak surface inversions in some locales during the overnights. This of course has the potential to drag over night low temperatures a few degrees cooler than whats anticipated, especially in low lying areas. It is likely mitigation will be needed for budding tree fruits in any such areas that are typically prone to cold air pooling. Temperatures are expected to warm back to near average for the weekend.


Important Points about Next Week's Weather

South Central Washington
Remainder of the Week
  • Wind: Breezy SW winds to begin tapering down through the overnight. Mild winds expected to remain generally SW through the week with a few gusts near 30 mph at times.
  • Precipitation: Low chance for a light rain shower or two through Wednesday. Dry expected for Thursday. Chance for a scattered rain shower Friday.
  • High Temps: Upper 50s Tuesday, upper 50s Wednesday, upper 50s Thursday, low 60s Friday.
  • Low Temps: Low 30s Monday night, near 30 Tuesday night, upper 20s Wednesday night, mid 30s Thursday night.
  • Sky Cover: Partly cloudy Monday night, partly sunny Tuesday, partly cloudy Tuesday night, mostly sunny Wednesday, partly cloudy Wednesday night, sunny Thursday, mostly cloudy Thursday night, partly sunny Friday.

Weekend
  • Wind: Mild SW winds to continue.
  • Precipitation: Low chance for a few scattered rain showers.
  • High Temps: Mid 60s Saturday, mid 60s Sunday.
  • Low Temps: Near 40 Friday night, low 40s Saturday night, mid 40s Sunday night.
  • Sky Cover: Partly sunny to mostly cloudy.

North Central Washington
Remainder of the Week
  • Wind: Winds to taper down through the over night and become mild and from the SW. Direction switching W/NW Tuesday night, and back to W/SW Thursday night, but remaining generally mild through the week with a few gusts near 30mph at times.
  • Precipitation: Low chance for a light lowland rain shower or two and a greater chance for upland snow through Wednesday with light accumulations expected. Likely dry Thursday. Chance for a scattered lowland rain shower and greater chance for an upland rain/snow shower Friday.
  • High Temps: Low 50s Tuesday, low 50s Wednesday, near 50 Thursday, mid 50s Friday. Cooler in higher terrain.
  • Low Temps: Upper 20s Monday night, mid 20s Tuesday night, low 20s Wednesday night, near 30 Thursday night. Cooler in higher terrain.
  • Sky Cover: Partly cloudy Monday night, partly sunny Tuesday, mostly cloudy Tuesday night, mostly sunny Wednesday, mostly clear Wednesday night, mostly sunny Thursday, mostly cloudy Thursday night, partly sunny Friday.

Weekend
  • Wind: Mild S/SW winds to continue.
  • Precipitation: Scattered lowland rain and upland rain/snow showers.
  • High Temps: Mid 50s Saturday, mid 50s Sunday. Cooler in higher terrain.
  • Low Temps: Low 30s Friday night, mid 30s Saturday night, near 40 Sunday night. Cooler in higher terrain.
  • Sky Cover: Partly sunny to mostly cloudy.

Eastern Washington
Remainder of the Week
  • Wind: Breezy SW winds to begin tapering down through the overnight. Mild winds expected to remain generally SW through the week with a few gusts near 30mph at times. A bit breezier through the Palouse.
  • Precipitation: Scattered rain/snow showers through Wednesday. Little to no snow accumulation expected. Dry conditions likely Thursday. Scattered rain/snow showers Friday.
  • High Temps: Mid 40s Tuesday, mid 40s Wednesday, upper 40s Thursday, upper 40s Friday.
  • Low Temps: Near 30 Monday night, upper 20s Tuesday night, mid 20s Wednesday night, near 30 Thursday night.
  • Sky Cover: Partly cloudy Monday night, partly sunny Tuesday, mostly cloudy Tuesday night, partly sunny Wednesday, partly cloudy Wednesday night, mostly sunny Thursday, mostly cloudy Thursday night, mostly cloudy Friday.

Weekend
  • Wind: Mild SW winds to continue.
  • Precipitation: Scattered lowland rain and upland rain/snow showers.
  • High Temps: Low 50s Saturday, mid 50s Sunday.
  • Low Temps: Mid 30s Friday night, mid 30s Saturday night, near 40 Sunday night.
  • Sky Cover: Mostly cloudy

Western Washington
Remainder of the Week
  • Wind: Breezy S/SW winds to taper off during Monday night. Mild S/SW winds expected through the week with some gusts into the 30 mph range at times.
  • Precipitation: Light to moderate Rain showers to continue through the week. A brief dry window expected Thursday before more showers move in Thursday night. Snow showers expected through the Cascades and Olympics. Only a couple of inches of accumulation expected.
  • High Temps: Upper 40s Tuesday, low 50s Wednesday, upper 40s Thursday, near 50 Friday. Much cooler through the Cascades and Olympics.
  • Low Temps: Mid 30s Monday night, low 30s Tuesday night, low 30s Wednesday night, upper 30s Thursday night. Much cooler through the Cascades and Olympics.
  • Sky Cover: Mostly cloudy Monday night, mostly cloudy Tuesday, mostly cloudy Tuesday night, partly sunny Wednesday, partly cloudy Wednesday night, mostly cloudy Thursday, cloudy Thursday night, cloudy Friday.

Weekend
  • Wind: Mild S/SW winds to continue.
  • Precipitation: Rain and mountain snow showers through the weekend.
  • High Temps: Low 50s Saturday, mid 50s Sunday.
  • Low Temps: Near 40 Friday night, near 40 Saturday night, low 40s Sunday night.
  • Sky Cover: Mostly cloudy to overcast. Areas of fog.

Like us on Facebook at https://www.facebook.com/AgWeatherNet
Follow us on Twitter at https://www.twitter.com/AgWeatherNet
Washington State University