AgWeatherNet Weekly Weather Outlook Monday Update for June 29 to July 5, 2020

Weather remaining slightly unsettled and cooler than average

Craig Oswald, Field Meteorologist, 509-786-9256

Discussion:

Weather conditions for the week continue to look a bit unsettled as a potent cut off low continues to reside over Idaho. Currently on Monday afternoon, rain showers look to be relegated to the far southeast corner of the state with a few scattered showers present throughout the Palouse.

As the week progresses the upper low over Idaho is expected to drift to the north and gradually weaken. However, it is anticipated that another upper disturbance will move into the Pacific Northwest from the northwest on Tuesday. This will be enough to produce some rain showers throughout northern and western Washington, especially upland areas and the Cascades. But it will also help to strengthen the already existent upper low as it moves into Canada. European and Canadian models both seem to indicate that the upper low and robust trough, along with a warm moist air mass to the east and a dry cool air mass to the west will be enough to initialize a surface cyclone over southern Saskatchewan which then looks to unusually track toward the northwest into Alberta and British Columbia. This is expected to produce ample rain throughout southern Canada with some shower activity spilling into Washington. On and off showers can be expected through Thursday throughout upland and mountainous areas of northern Washington and the Cascades. A few scattered rain showers stand to work their way into lowland areas of northern and western Washington as well. Conditions are expected to remain dry through the Basin and southern Washington with a few isolated showers possible across the Palouse.

Friday looks to be the only dry day statewide for the outlook period. Yet a third upper disturbance looks to move into the region from near the Bearing Sea. It is expected that scattered rain showers will move in from the west as the disturbance ultimately moves inland form the Pacific. Again, showers look to be relegated through upland and mountain areas of northern and western Washington with a few scattered showers likely throughout lowland regions of western Washington.

Temperatures are anticipated to remain slightly below to near average while gradually warming through the week. Slightly above to near average temperatures are anticipated for the weekend.


Important Points about Next Week's Weather

South Central Washington
Remainder of the Week
  • Wind: W/SW winds becoming windy Tue with some gusts near 40 mph possible. Winds to slightly ease Wed yet remain breezy. Generally light to breezy conditions Thu with winds turning lighter and variable by Fri.
  • Precipitation: Dry conditions expected.
  • High Temps: Near 80 Tue, upper 70s Wed, low 80s Thu, mid 80s Fri.
  • Low Temps: Mid 50s Mon night, upper 40s Tue night, near 50 Wed night, near 50 Thu night.
  • Sky Cover: Mostly sunny and mostly clear.

Weekend
  • Wind: Generally W/SW winds remining mostly light and variable, yet breezier at times during the afternoon hours.
  • Precipitation: Dry conditions expected.
  • High Temps: Upper 80s Sat, upper 80s Sun.
  • Low Temps: Low 50s Fri night, mid 50s Sat night, mid 50s Sun night.
  • Sky Cover: Mostly sunny and mostly clear.

North Central Washington
Remainder of the Week
  • Wind: W/NW winds becoming windy Tue with some gusts near 40 mph possible through the Basin. Winds shifting more W/SW Wed and slightly easing yet remaining breezy. Generally light to breezy conditions Thu with winds turning lighter and variable by Fri.
  • Precipitation: On/off upland and mountain rain showers through Thursday with the chance for a stray rain shower or two through lowland areas. Low chance for a stray rain shower in northern parts of the Basin. Dry region wide Friday.
  • High Temps: Upper 70s Tue, upper 60s Wed, mid 70s Thu, low 80s Fri. Cooler through high terrain.
  • Low Temps: Mid 50s Mon night, mid 50s Tue night, low 50s Wed night, low 50s Thu night. Cooler through high terrain.
  • Sky Cover: Mostly clear Mon night with clouds building in Tue. Mostly cloudy through mid week with skies clearing by Thu night. Mostly sunny Fri.

Weekend
  • Wind: Generally W/SW winds remining mostly light and variable, yet breezier at times during the afternoon hours.
  • Precipitation: Mostly upland and mountain rain showers to return Saturday and trend dry through Sunday with a shower or two lingering into Mon.
  • High Temps: Mid 80s Sat, mid 80s Sun. Cooler through high terrain.
  • Low Temps: Mid 50s Fri night, upper 50s Sat night, upper 50s Sunday night. Cooler through high terrain.
  • Sky Cover: Partly cloudy and partly clear.

Eastern Washington
Remainder of the Week
  • Wind: Breezy SW/W flow through Wed with gusts near 40 mph. SW/S flow Thu & Fri with light wind.
  • Precipitation: Isolated showers through Thu evening, especially in upland areas. Turning dry for Fri.
  • High Temps: Near 70 Tue, mid 60s Wed, mid 70s Thu, upper 70s Fri.
  • Low Temps: Near 50 Mon night, upper 40s Tue & Wed night, near 50 Thu night.
  • Sky Cover: Partly to mostly cloudy through Wed night. Sunny to partly cloudy Thu & Fri.

Weekend
  • Wind: Generally light with SW flow.
  • Precipitation: Low chance of a stray shower in the Blue Mountains Sat, otherwise dry.
  • High Temps: Near 80 Sat & Sun.
  • Low Temps: Low 50s Fri night, mid 50s Sat night, low 50 Sun night.
  • Sky Cover: Sunny to partly cloudy.

Western Washington
Remainder of the Week
  • Wind: Generally W flow. Breezy on the Coast and through the Strait Mon-Fri with gusts to 35 mph. Breezy in the South Sound Tue-Thu with gusts to 30 mph.
  • Precipitation: Scattered light rain showers through Thu. Dry Fri.
  • High Temps: Upper 60s to low 70s through Thu. Low to mid 70s Fri. Cooler in higher terrain.
  • Low Temps: Mid 50s Mon night through Thu night. Cooler in higher terrain.
  • Sky Cover: Partly cloudy to overcast through Thu. Sunny to partly cloudy Fri.

Weekend
  • Wind: Generally W flow. Breezy on the Coast and through the Strait Sat-Sun.
  • Precipitation: Mostly mountain rain showers return Sat with a few scattered showers through lowland areas. Trending dry through Sunday night.
  • High Temps: In the 70s Sat & Sun. Cooler in higher terrain.
  • Low Temps: Mid 50s Fri, Sat, and Sun nights. Cooler in higher terrain.
  • Sky Cover: Sunny to partly cloudy Sat-Sun.

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