AgWeatherNet Weekly Weather Outlook Monday Update for Apr 20 to Apr 26, 2020

Widespread rain expected mid-week and again during the weekend

Craig Oswald, Field Meteorologist, 509-786-9256

Discussion:

The persistent ridge that has taken up residence over the north Pacific for the past couple of weeks still looks to breakdown as the Pacific Northwest continues to transition to a more zonal flow regime. This looks to shift the storm track back over the Pacific Northwest and provide much anticipated widespread rain showers throughout the state. A round of banded rain showers associated with a decaying front produced from a robust surface circulation located south of the Aleutian Islands are expected to begin moving in from the west Tuesday night. Showers will continue to move west through the state Wednesday with most regions to trend dry through Wednesday night. Western Washington will likely cling to a few scattered showers through Thursday, especially in mountain regions. Snow levels are not anticipated to reach pass levels.

Another round of banded type rain is expected to begin moving through the state from the west Saturday. This looks to again bring widespread rain showers statewide before conditions trend dry through Saturday night.

As a little bit of cold air is expected to move through the state behind each of the passing rain events, some protections will likely be necessary for budding and blossoming perennial fruit crops. Thursday and Saturday nights look to be the nights of greatest concern with temperatures near 30 likely for colder locations in fruit growing regions.


Important Points about Next Week's Weather

South Central Washington
Remainder of the Week
  • Wind: SW and increasing Tuesday. Turning W/SW and becoming slightly less windy Wednesday. Again increasing Thursday. Some gusts between 30-35mph possible. Trending lighter and turning S/SW Friday.
  • Precipitation: Widespread rain showers to move in from the W Wednesday. Trending dry Wednesday night and remaining dry through the end of the week.
  • High Temps: Low 70s Tuesday, low 60s Wednesday, upper 60s Thursday, low 70s Friday.
  • Low Temps: Low 40s Monday night, mid 40s Tuesday night, mid 40s Wednesday night, upper 30s Thursday night.
  • Sky Cover: Clear Monday night, sunny Tuesday, partly cloudy Tuesday night, cloudy Wednesday, mostly cloudy Wednesday night, mostly sunny Thursday, partly cloudy Thursday night, mostly sunny Friday.

Weekend
  • Wind: S/SW and expected to increase and turn W with windy conditions Saturday. Trending lighter Saturday night and generally light and variable Sunday.
  • Precipitation: Widespread rain showers to move in from the W Saturday. Trending dry Saturday night. Dry Sunday.
  • High Temps: Low 70s Saturday, low 70s Sunday.
  • Low Temps: Mid 40s 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: Generally W and increasing Tuesday. Becoming slightly less windy Wednesday. Again increasing Thursday. Some gusts between 30-35mph possible, especially through the Basin. Trending lighter and turning S/SW Friday.
  • Precipitation: Widespread rain showers to move in from the W Wednesday. Trending dry for Basin and low elevation locations Wednesday night with a continued chance for scattered rain showers in upland areas through Friday.
  • High Temps: Near 70 Tuesday, low 60s Wednesday, mid 60s Thursday, upper 60s Friday. Cooler through higher terrain.
  • Low Temps: Mid 40s Monday night, mid 40s Tuesday night, low 40s Wednesday night, near 40 Thursday night. Cooler through higher terrain.
  • Sky Cover: Clear Monday night, sunny Tuesday, mostly cloudy Tuesday night, mostly cloudy Wednesday, mostly cloudy Wednesday night, partly sunny Thursday, mostly clear Thursday night, mostly sunny Friday.

Weekend
  • Wind: S/SW and expected to increase and turn W with windy conditions Saturday, especially through the Basin. Trending lighter Saturday night and generally light and variable Sunday.
  • Precipitation: Widespread rain showers to move in from the W Saturday. Trending dry Saturday night. Dry Sunday.
  • High Temps: Low 60s Saturday, mid 60s Sunday. Cooler through higher terrain.
  • Low Temps: Low 40s Friday night, upper 30s Saturday night, near 40 Sunday night. Cooler through higher terrain.
  • Sky Cover: Mostly cloudy.

Eastern Washington
Remainder of the Week
  • Wind: SW and increasing Tuesday. Turning W/SW and becoming slightly less windy Wednesday. Again increasing Thursday. Some gusts between 30-35mph possible. Trending lighter and turning S/SW Friday.
  • Precipitation: Widespread rain showers to move in from the W Wednesday. Trending dry for interior locations Wednesday night with a continued chance for scattered rain showers along the Idaho border Thursday before trending totally dry Thursday night.
  • High Temps: Low 60s Tuesday, mid 50s Wednesday, mid 50s Thursday, upper 50s Friday.
  • Low Temps: Near 40 Monday night, near 40 Tuesday night, low 40s Wednesday night, mid 30s Thursday night.
  • Sky Cover: Clear Monday night, sunny Tuesday, partly cloudy Tuesday night, cloudy Wednesday, mostly cloudy Wednesday night, mostly cloudy Thursday, partly cloudy Thursday night, mostly sunny Friday.

Weekend
  • Wind: S/SW and expected to increase and turn W with windy conditions Saturday. Trending lighter Saturday night and generally light and variable Sunday.
  • Precipitation: Widespread rain showers to move in from the W Saturday. Trending dry Saturday night. Dry Sunday.
  • High Temps: Low 60s Saturday, upper 50s Sunday.
  • Low Temps: Upper 30s Friday night, upper 30s Saturday night, near 40 Sunday night.
  • Sky Cover: Partly sunny to mostly cloudy.

Western Washington
Remainder of the Week
  • Wind: Generally S and increasing Tuesday. Becoming slightly less breezy and turning more variable Wednesday. Again increasing and becoming mostly S Thursday. Speeds mostly around 10mph expected. Trending lighter and variable Friday.
  • Precipitation: A few scattered rain showers possible Tuesday ahead of a band of widespread rain that looks to start moving in from the W Tuesday night. Showers to trend more scattered in nature Wednesday night through Thursday and conditions to turn dry Thursday night. Extended periods of precip in mountain areas with snow levels near 5000ft during the overnights.
  • High Temps: Upper 50s Tuesday, upper 50s Wednesday, low 60s Thursday, mid 60s Friday. Much cooler through the Cascades and Olympics.
  • Low Temps: Low 40s Monday night, mid 40s Tuesday night, mid 40s Wednesday night, low 40s Thursday night. Much cooler through the Cascades and Olympics.
  • Sky Cover: Partly cloudy Monday night, partly sunny Tuesday, cloudy Tuesday night, cloudy Wednesday, mostly cloudy Wednesday night, mostly cloudy Thursday, mostly cloudy Thursday night, mostly cloudy Friday. Patchy fog at times.

Weekend
  • Wind: Expected to increase and turn W with windy conditions Saturday. Trending lighter Saturday night and generally light and variable Sunday.
  • Precipitation: Widespread rain showers to move in from the W Saturday. Trending dry Saturday night. Dry Sunday aside from a few mountain rain showers lingering through the day.
  • High Temps: Low 60s Saturday, low 60s Sunday. Much cooler through the Cascades and Olympics.
  • Low Temps: Mid 40s Friday night, mid 40s Saturday night, mid 40s Sunday night. Much cooler through the Cascades and Olympics.
  • Sky Cover: Mostly cloudy to cloudy.

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