AgWeatherNet Weekly Weather Outlook for January 28 to February 3, 2017

Dry and Stagnant on Saturday; Becoming More Active Next Week

Nic Loyd, Meteorologist, 509-786-9357

With a strong ridge of high pressure in place, Saturday's weather should be a study in contrasts. While grey and murky conditions are expected for much of the lowlands, relatively pleasant and spring-like weather is likely above the low clouds in the higher mountains, western foothills, and near the coast. The calm and stagnant pattern will give way to a weak front and rainfall in northwestern areas later on Sunday, although the weakened ridge is not anticipated to fully relinquish control until early to mid next week. In any case, the initially dry weather and poor air quality is forecast to switch to an active regime later in the period, as precipitation chances and winds increase after Monday or Tuesday.

The key question going forward is whether any cold air slips into Washington before the ultimate arrival of the precipitation. The upcoming transition toward unsettled conditions looks to be complicated, with a blocking pattern developing in the Pacific Ocean. If the moist and comparatively warm southwesterly jet stream outpaces the cool, dry Canadian air in the race toward Washington, a somewhat mild and wetter period may develop for Washington. However, there is a small chance that the mild, moist air may not completely win the battle for territory, and will instead converge with the cool air somewhere near the Northwest. If that colder (and less likely) evolution transpires, there may be impactful and wintry weather in parts of Washington. As a result of the uncertainty and the conflicting signals, temperatures will be a tough call for much of the period, but changeable conditions can be expected in any event.

Temperatures
  • Seasonal in the lowlands and very mild in the mountains on Saturday.
  • Variable next week.

Precipitation
  • A chance of rain in northwestern Washington later on Sunday.
  • Rain in the west, and rain or perhaps snow east of the Cascades, is possible at times beginning around mid week.

Wind
  • Light breezes at times this weekend.
  • Possibly windier later in the period.

8 to 14 Day Outlook - February 4, 2017 to February 10, 2017
  • Overall, near to above average temperatures and near to above 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 upper 30s to mid 40s and lows in the 20s to mid 30s.
Weekend
  • Mostly dry. Fog or low clouds likely on Saturday.
  • Highs in the 30s to low 40s on Saturday, and 30s to mid 40s on Sunday.
  • Lows in the mid 20s to mid 30s.
Next Week
  • Mostly dry early. A chance of rain or possibly snow later in the week.
  • Highs in the 30s to mid 40s.
  • Lows in the mid 20s to mid 30s.

North Central Washington
  • Normal conditions for this time of the year would be highs in the 30s to around 40 and lows in the 20s.
Weekend
  • Mostly dry. Fog or low clouds likely on Saturday.
  • Highs in the 30s on Saturday, and 30s to low 40s on Sunday.
  • Lows in the mid 20s to mid 30s.
Next Week
  • Mostly dry early. A chance of rain or snow later in the week.
  • Highs in the 30s to low 40s.
  • Lows in the mid 20s to low 30s.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the mid 30s to low 40s and lows in the 20s to around 30.
Weekend
  • Mostly dry. Fog or low clouds possible on Saturday.
  • Highs in the mid 30s to low 40s.
  • Lows in the mid 20s to mid 30s.
Next Week
  • Mostly dry early. A chance of rain or possibly snow later in the week.
  • Highs in the mid 30s to low 40s.
  • Lows in the mid 20s to mid 30s.

Western Washington
  • Normal conditions for this time of the year would be highs in the mid 40s to low 50s and lows in the mid 30s to around 40.
Weekend
  • Mostly dry on Saturday, and then rain likely in the northwest on Sunday.
  • Highs in the mid 40s to low 50s, except warmer at the coast on Saturday.
  • Lows in the 30s to low 40s.
Next Week
  • A slight chance of rain early in the week.
  • Rain likely by mid week.
  • Highs in the mid 40s to low 50s.
  • Lows in the 30s to low 40s.
Washington State University