AgWeatherNet Weekly Weather Outlook Monday (Tuesday) Update for May 26 to May 31, 2020

Warming trend to continue with well above average temps by weeks end

Craig Oswald, Field Meteorologist, 509-786-9256

Discussion:

Weather conditions look to continue to warm and to remain dry through most of the week as a zonal flow pattern continues to dominate the Pacific Northwest. A short lived ridge looks to move in from the west by weeks end, helping to pump day time high temperatures well above average for this time of year. While temperatures are expected to be quite warm statewide, south central Washington looks to see temperatures as high as the mid 90s by Friday and Saturday.

As teased in the last Fridays outlook, the chance for a few thunderstorms Saturday throughout Washington still remains. The chance of storms and rain showers in general appears to be due to two things. A robust upper level cut-off low that is currently west of the southern California coast which is anticipated to move north and merge with the mean flow, helping to deepen an incoming trough from the west and provide instability aloft. And a strong surface cyclone and its afore mentioned upper low, which look to move into the Gulf of Alaska and bring with it moisture from the tropics. Together, this looks to be conducive for some thunderstorm activity Saturday with storms expected to develop during the afternoon and move from the south/southwest to north/northeast. Conditions are likely to be dry/trend dry Sunday.

Cooler and more seasonable temperatures are expected to fill in behind the passing showers as the Pacific northwest takes up residence within the upper trough into early next week.


Important Points about Next Week's Weather

South Central Washington
Remainder of the Week
  • Wind: Light and mostly W/SW yet variable. Turning NE mid week and remaining light.
  • Precipitation: Dry conditions expected.
  • High Temps: Mid 80s Wed, upper 80s Thu, mid 90s Fri.
  • Low Temps: Upper 50s Tue night, mid 50s Wed night, upper 50s Thu night.
  • Sky Cover: Partly cloudy Tue night, sunny Wed, partly cloudy Wed night, mostly sunny Thu, partly cloudy Thu night, mostly sunny Fri.

Weekend
  • Wind: NE and becoming breezy/windy Saturday, especially around any thunderstorms. Shifting S/SW Sunday and remaining windy. Winds to ease through Sunday night.
  • Precipitation: Chance for a few scattered thunderstorms Saturday along with rain showers moving in from the S/SW. Dry Sunday.
  • High Temps: Low 90s Sat, upper 70s Sun.
  • Low Temps: Mid 60s Fri night, mid 50s Sat night, low 50s Sun night.
  • Sky Cover: Mostly sunny to mostly cloudy.

North Central Washington
Remainder of the Week
  • Wind: Light and mostly W/NW yet variable. Turning more NE mid week and remaining light yet variable.
  • Precipitation: Dry conditions expected.
  • High Temps: Near 80 Wed, mid 80s Thu, near 90 Fri. Cooler through high terrain.
  • Low Temps: Mid 40s Tue night, low 50s Wed night, mid 50s Thu night. Cooler through high terrain.
  • Sky Cover: Mostly clear Tue night, sunny Wed, partly cloudy Wed night, partly sunny Thu, partly cloudy Thu night, mostly sunny Fri.

Weekend
  • Wind: Becoming more variable and breezier/windy Saturday, especially through the Basin and around any thunderstorms. Shifting generally S Sunday and remaining windy. Winds to ease Sunday night.
  • Precipitation: Chance for a few scattered thunderstorms Saturday along with rain showers moving in from the S. A few showers likely to linger into Sunday before trending dry.
  • High Temps: Upper 80s Sat, mid 70s Sun. Cooler through high terrain.
  • Low Temps: Low 60s Fri night, upper 50s Sat night, near 50 Sunday night. Cooler through high terrain.
  • Sky Cover: Partly sunny to mostly cloudy.

Eastern Washington
Remainder of the Week
  • Wind: Light and mostly W/SW yet variable. Turning NE mid week and remaining light.
  • Precipitation: A light rain shower or two possible near the Blue Mtns, and to a lesser extent the Palouse, Friday. Otherwise dry conditions expected region wide.
  • High Temps: Mid 70s Wed, near 80 Thu, mid 80s Fri.
  • Low Temps: Mid 40s Tue night, upper 40s Wed night, mid 50s Thu night.
  • Sky Cover: Mostly cloudy Tue night, sunny Wed, mostly clear Wed night, mostly sunny Thu, partly cloudy Thu night, mostly sunny Fri.

Weekend
  • Wind: NE and becoming breezy/windy Saturday, especially around any thunderstorms. Shifting S/SW Sunday and remaining windy. Winds to ease through Sunday night.
  • Precipitation: Chance for a few scattered thunderstorms Saturday along with rain showers moving in from the S/SW. Dry Sunday.
  • High Temps: Mid 80s Sat, upper 60s Sun.
  • Low Temps: Near 60 Fri night, low 50s Sat night, upper 40s Sun night.
  • Sky Cover: Partly sunny to mostly cloudy.

Western Washington
Remainder of the Week
  • Wind: Generally light and W yet variable.
  • Precipitation: Low chance for a light rain shower in far NW parts of the region Friday. Otherwise dry conditions expected region wide.
  • High Temps: Mid 70s Wed, low 80s Thu, low 80s Fri. Much cooler through the Cascades and Olympics.
  • Low Temps: Mid 40s Tue night, near 50 Wed night, low 50s Thu night. Much cooler through the Cascades and Olympics.
  • Sky Cover: Partly cloudy Tue night, sunny Wed, partly cloudy Wed night, mostly sunny Thu, partly cloudy Thu night, mostly sunny Fri.

Weekend
  • Wind: Remaining light and generally W/SW yet variable Saturday. W/SW and becoming breezy Sunday. Winds easing through Sunday night.
  • Precipitation: Light to moderate rain showers moving in from the S/SW Saturday. Showers becoming more scattered in nature and trending dry through Sunday from S to N.
  • High Temps: Mid 60s Sat, mid 60s Sun. Much cooler through the Cascades and Olympics.
  • Low Temps: Low 50s Fri night, upper 40s Sat night, mid 40s Sun night. Much cooler through the Cascades and Olympics.
  • Sky Cover: Partly sunny to mostly cloudy.

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