AgWeatherNet Weekly Weather Outlook for August 22 to August 28, 2015

Sunny and Warmer This Weekend; Cooler Later Next Week

Nic Loyd, Meteorologist, 509-786-9357
Gerrit Hoogenboom, Director, 509-786-9371

Strong daytime warming is likely starting in the west this weekend, as high pressure quickly rebuilds across Washington. Winds should die down relative to Friday, and dry air will allow for pleasant mornings despite the overall warming trend. For next week, a low pressure area is expected to approach the coast, but the ultimate movement is still very much in question.

The global atmospheric circulation is being influenced by several strong tropical systems in the western Pacific, and as a result, the recent erratic performance of forecast models continues at this time. Although some model solutions bring the cool low pressure trough inland, others show it stalling off the coast, which would pump warm southerly winds into the region next week. Although the former outcome is quite possible, the latter has occurred more often this summer. Right now, our forecast splits the difference and calls for eastern heat early next week, with some cooling later in the week. However, it is possible that either heat will persist all week, at least in the east, or that strong cooling will arrive statewide by mid week.

Temperatures
  • Daytime warming from west to east this weekend.
  • Cooler days in the west next week.
  • Possibly cooler in the east later next week.

Precipitation
  • Mostly dry.
  • A slight chance of showers at times next week.

Wind
  • Decreasing wind in the east on Saturday morning.
  • Possibly increasing around the middle of next week.

8 to 14 Day Outlook - August 29, 2015 to September 4, 2015
  • Overall, near average temperatures and near average precipitation are expected during the 8 to 14 day time frame.

Important Points about Next Week's Weather

South Central Washington
  • Normal conditions for this time of the year would be highs in the mid 80s to low 90s and lows in the 50s to around 60.
Weekend
  • Mostly dry.
  • Highs in the 80s to low 90s on Saturday, and upper 80s to 90s on Sunday.
  • Lows in the 50s.
Next Week
  • Mostly dry.
  • Highs in the 90s early, and possibly cooler later in the week.
  • Lows in the 50s to mid 60s, and possibly cooler later in the week.

North Central Washington
  • Normal conditions for this time of the year would be highs in the mid 80s to around 90 and lows in the mid 50s to around 60.
Weekend
  • Mostly dry.
  • Highs in the 80s on Saturday, and upper 80s to mid 90s on Sunday.
  • Lows in the 50s.
Next Week
  • Mostly dry.
  • Highs in the upper 80s to 90s early, and possibly cooler later in the week.
  • Lows in the 50s to mid 60s, and possibly cooler later in the week.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the 80s to around 90 and lows in the low to mid 50s.
Weekend
  • Mostly dry.
  • Highs in the upper 70s to mid 80s on Saturday, and upper 80s to mid 90s on Sunday.
  • Lows in the mid 40s to low 50s on Saturday morning, and mid 40s to 50s on Sunday morning.
Next Week
  • Mostly dry.
  • Highs in the upper 80s to 90s early, and possibly cooler later in the week.
  • Lows in the 50s, and possibly cooler later in the week.

Western Washington
  • Normal conditions for this time of the year would be highs in the 70s, except cooler at the coast, and lows in the low to mid 50s.
Weekend
  • Mostly dry.
  • Highs in the upper 70s to 80s on Saturday, and 80s to low 90s on Sunday, except possibly cooler at the coast.
  • Lows in the upper 40s to 50s on Saturday morning, and 50s on Sunday morning.
Next Week
  • Mostly dry. A slight chance of showers by mid week.
  • Highs in the 70s early, and possibly cooler later in the week.
  • Lows in the 50s to low 60s, and possibly cooler later in the week.
Washington State University