AgWeatherNet Weekly Weather Outlook for October 20 to October 26, 2012

Cool and Unsettled Weather Through Next Week

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

For the first time this autumn, Washington will enter a cool and unsettled period which should last through next week. As a cold front traverses the state early on Saturday, eastern areas will experience one final mild morning thanks to clouds and gusty winds. However, temperatures will not warm up significantly during the day, as cool air floods into the region. Periodic weather systems will bring showers to Washington at times, with the driest areas being in the lee of the Cascades. It will also be cloudy, breezy, and moist, with chilly day-time temperatures through this weekend and next week. However, central Washington has the best chance of seeing intervals of sunshine. A trough of low pressure will dominate the weather, as an upper low off the Northwest coast sends a moist southwesterly flow across the region. The most significant changes will be felt in the mountains, where a taste of winter is likely by Sunday. Temperatures will be in the 30s during the day, with periodic light snow accumulations down to pass level. Lowland high temperatures will be generally in the upper 40s to mid 50s, while lows will be in the 30s, except upper 30s to mid 40s in western Washington.

Temperatures
  • Cooler than normal during the day.
  • Cold in the Cascades.

Rainfall
  • Showers likely at times in western and eastern Washington.
  • A chance of showers at times in central Washington.
  • Snow showers at times in the mountains.

Wind
  • Breezy to windy at times, especially on Saturday.

Frost Risk Summary
  • Moderate risk throughout the outlook period.

Important Points about Next Week's Weather

South Central Washington
  • Normal conditions for this time of the year would be highs in the low 60s and lows in the mid to upper 30s.
Weekend
  • A slight chance of showers. Windy on Saturday.
  • Highs in the mid 50s to mid 60s on Saturday, and upper 40s to 50s on Sunday.
  • Lows in the 40s to low 50s on Saturday morning, and upper 20s to 30s on Sunday morning.
Next Week
  • A chance of showers and breezy at times.
  • Highs in the upper 40s to 50s.
  • Lows in the upper 20s to 30s.

North Central Washington
  • Normal conditions for this time of the year would be highs in the upper 50s and lows in the mid to upper 30s.
Weekend
  • A chance of showers and breezy.
  • Highs in the mid 50s to around 60 on Saturday, and upper 40s to low 50s on Sunday.
  • Lows in the 40s to around 50 on Saturday morning, and upper 20s to 30s on Sunday morning.
Next Week
  • A chance of showers and breezy at times.
  • Highs in the mid 40s to mid 50s.
  • Lows in the upper 20s to 30s.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the upper 50s and lows in the mid to upper 30s.
Weekend
  • Showers likely and breezy. A slight chance of overnight snow showers later in the weekend.
  • Highs in the low 50s on Saturday, and mid 40s to low 50s on Sunday.
  • Lows in the low to mid 40s on Saturday morning, and low to mid 30s on Sunday morning.
Next Week
  • Showers likely at times and breezy. A slight chance of night-time snow showers.
  • Highs in the mid 40s to low 50s.
  • Lows in the upper 20s to 30s.

Western Washington
  • Normal conditions for this time of the year would be highs in the upper 50s to around 60 and lows in the low to mid 40s.
Weekend
  • Showers likely and breezy.
  • Highs in the upper 40s to mid 50s.
  • Lows in the 40s on Saturday morning, and mid 30s to mid 40s on Sunday morning.
Next Week
  • Showers at times and breezy.
  • Highs in the upper 40s to mid 50s.
  • Lows in the mid 30s to mid 40s.

Washington State University