AgWeatherNet Weekly Weather Outlook for January 19 to January 25, 2013

Stagnant Inversions Through Tuesday; Unsettled With Cleaner Air Late Next Week

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

The persistent ridge of high pressure will keep cold air, low clouds, and pollutants trapped in the lowlands this weekend. At the same time, sunny and mild conditions will continue in the mountains. The uneventful weather will end around next Wednesday, as a weak weather system ushers in a more seasonally unsettled pattern for Washington. The main effects of the pattern change will be breezy weather and cleaner air, along with wetter conditions, especially for western Washington. The lowlands, especially in central Washington, will see a warm up around the middle of next week, as the cold surface air is scoured out. At the same time, the mountains will see cooler temperatures, as much colder air aloft moves in from the North Pacific.

Temperatures
  • Cold this weekend and early next week in the lowlands, and warm in the mountains.
  • Becoming milder in the lowlands and cooler in the mountains next Wednesday.

Rainfall
  • Dry statewide through Tuesday.
  • Rain likely for western Washington, with a chance of rain east of the Cascades starting on Wednesday.

Wind
  • Mainly calm through Tuesday.
  • Becoming breezy around Wednesday.

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

8 to 14 Day Outlook - January 26 to February 1
  • The more active pattern is expected to continue the start of week 2, and then another ridge of high pressure may build into the region at the end of January and into early February.

Important Points about Next Week's Weather

South Central Washington
  • Normal conditions for this time of the year would be highs in the low 40s and lows in the upper 20s.
Weekend
  • Dry, with low clouds and fog. Poor air quality.
  • Highs in the upper 20s to mid 30s.
  • Lows in the 20s.
Next Week
  • Dry, with areas of low clouds early, and then a slight chance of rain by Wednesday.
  • Air stagnation likely ending by later in the week.
  • Highs in the upper 20s to 30s early, and then upper 30s to 40s later in the week.
  • Lows in the 20s early, and then mid 20s to mid 30s later in the week.

North Central Washington
  • Normal conditions for this time of the year would be highs in the mid to upper 30s and lows in the mid 20s.
Weekend
  • Dry, with areas of low clouds. Poor air quality.
  • Highs in the mid 20s to mid 30s.
  • Lows in the upper teens to 20s.
Next Week
  • Dry, with possible low clouds early, and then a slight chance of rain or snow by Wednesday.
  • Highs in the mid 20s to mid 30s early, and then 30s later in the week.
  • Lows in the 20s early, and then mid 20s to around 30 later in the week.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the upper 30s and lows in the upper 20s.
Weekend
  • Dry, with areas of low clouds, otherwise partly sunny.
  • Highs in the upper 20s to mid 30s.
  • Lows in the mid teens to mid 20s.
Next Week
  • Dry early, with a chance of rain or snow by Wednesday.
  • Highs in the 30s to around 40.
  • Lows in the 20s early, and then mid 20s to mid 30s later in the week.

Western Washington
  • Normal conditions for this time of the year would be highs in the upper 40s to around 50 and lows in the upper 30s.
Weekend
  • Dry, with areas of low clouds and fog inland.
  • Partly sunny and mild in the mountains.
  • Highs in the mid 30s to mid 40s, except upper 40s to low 50s at the coast.
  • Lows in the mid 20s to mid 30s.
Next Week
  • Dry early, with rain developing on Wednesday.
  • Mild and dry early, with a chance of rain or snow and turning cooler in the mountains by mid week.
  • Highs in the 40s early, and then mid 40s to around 50 by mid week.
  • Lows in the upper 20s to mid 30s early, and then mid to upper 30s later in the week.

Washington State University