AgWeatherNet Weekly Weather Outlook for January 12 to January 18, 2013

Cold With a Chance of Light Snow This Weekend; Dry and Warming Next Week

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

As a large ridge of high pressure builds offshore, a drier and colder northerly air flow will overtake Washington this weekend. The only feature of note will be a weak system dropping through the state this weekend, which could give light snow or flurries to some areas, although no major impacts are expected. Next week will likely be entirely dry area wide, as the high pressure moves inland over Washington. While a warmer air mass will cause much milder conditions in the mountains and at the coast next week, central and eastern Washington may become trapped under a stagnant inversion. For these areas, the greatest weather concerns will be the potential for periods of fog, low clouds, and air quality issues. However, the mountains will be partly sunny with warming conditions through the week. While interior western Washington may become stable at times, it is likely that at least the coast will be partly to mostly sunny. If strong enough offshore flow develops around mid to late next week, the coast could see very mild temperatures approaching 60 degrees, although it is uncertain at this time.

Temperatures
  • Cold this weekend, especially east of the Cascades.
  • Becoming much milder by early to mid next week in the mountains and at the coast.
  • Limited and slow warming east of the Cascades, and possibly in parts of interior western Washington.

Rainfall
  • A chance of light snow this weekend, mostly west of the Cascades.
  • Dry next week.

Wind
  • Light northerly breezes this weekend.
  • Mostly calm next week, especially in central Washington.
  • A chance of periodically breezy east winds at the coast and in western Washington around Mt. Vernon next week.

Frost Risk Summary
  • This weekend: High risk.
  • Early next week: High risk, especially east of the Cascades.
  • Later next week: Decreasing risk, especially at the coast and higher elevations.

8 to 14 Day Outlook - January 19 to January 25
  • A generally dry period is expected due to a ridge of high pressure over the area. Temperatures may be seasonal, with cool temperatures most likely in the central Washington lowlands, and relative warmth most likely in the mountains. More active weather may return late in this period.

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 low 40s and lows in the mid to upper 20s.
Weekend
  • Mostly dry. A slight chance of light snow, especially on Saturday night.
  • Highs in the mid 20s to mid 30s.
  • Lows in the mid teens to mid 20s.
Next Week
  • Dry, with possible low clouds and fog developing by mid week, otherwise mostly sunny.
  • Air stagnation likely by mid week.
  • Highs in the upper 20s to 30s early, and then mid 30s to low 40s later in the week.
  • Lows in the upper teens to mid 20s early, and then 20s later in the week.

North Central Washington
  • Normal conditions for this time of the year would be highs in the mid 30s and lows in the low to mid 20s.
Weekend
  • Mostly dry. A slight chance of light snow, especially on Saturday night.
  • Highs in the 20s.
  • Lows in the upper single digits to teens.
Next Week
  • Dry, with possible areas of low clouds and fog developing by mid week, otherwise mostly sunny.
  • Highs in the mid 20s to low 30s early, and then upper 20s to 30s later in the week.
  • Lows in the mid teens to around 20 early, and then upper teens to 20s later in the week.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the mid to upper 30s and lows in the mid to upper 20s.
Weekend
  • Mostly dry. A slight chance of light snow, especially on Saturday night.
  • Highs in the 20s.
  • Lows in the teens.
Next Week
  • Dry, with a chance of periodic low clouds, otherwise mostly sunny.
  • Highs in the upper 20s to mid 30s early, and warming into the mid 30s to low 40s later in the week.
  • Lows in the mid teens to mid 20s early, and then 20s to low 30s later in the week.

Western Washington
  • Normal conditions for this time of the year would be highs in the upper 40s and lows in the mid to upper 30s.
Weekend
  • A chance of light snow or rain, especially near the coast.
  • Light snow showers possible in the mountains.
  • Highs in the mid 30s to low 40s on Saturday, and upper 30s to mid 40s on Sunday.
  • Lows in the 20s to low 30s on Saturday morning, and mid 20s to mid 30s on Sunday morning.
Next Week
  • Dry, with areas of low clouds and fog developing, especially from Olympia southward, otherwise partly sunny.
  • Mostly sunny at the coast and in the mountains.
  • Periodically breezy conditions possible at the coast, otherwise mostly calm.
  • Highs in the low to mid 40s early, and warming into the mid 40s to mid 50s later in the week, except 50s at the coast.
  • Lows in the upper 20s to mid 30s early, and then 30s later in the week.

Washington State University