AgWeatherNet Weekly Weather Outlook for December 13 to December 19, 2014

Calmer Weather This Weekend; Weak Systems Next Week

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

A welcome respite from the recent active weather arrives this weekend, as high pressure briefly re-establishes itself over the Northwest. Although showers could linger into Saturday morning in some areas, mainly dry conditions are expected through at least Monday. Winds should remain mostly light, while temperatures will decrease, especially in eastern border and western areas. Despite the absence of storms, lingering surface moisture and increasing stability may portend overnight low cloud and fog development, which could linger into the daylight hours in central Washington.

A few weak systems are likely to transit Washington during the middle to latter part of next week. Light rain and breezes are possible at times during the period, although heavy precipitation and strong winds are not expected at this time. Higher mountain areas could see some light snow, while night-time mixed precipitation is possible in especially the northern part of eastern Washington. A somewhat stronger and warmer storm could impact the state around next Friday, but the details are uncertain at this point.

Temperatures
  • Cooler, but still slightly above normal this weekend and next week.
  • Becoming warmer later next week.

Precipitation
  • A slight chance of lingering showers on Saturday morning, and then mainly dry into Monday.
  • Periodic light rain or eastern mix possible during the middle to latter part of next week.

Wind
  • Light breezes at times.

Frost Risk Summary
  • This Weekend: Moderate to high risk in the east, especially by Sunday morning.
  • Next Week: Moderate to high risk in the east early, and decreasing later in the week.

8 to 14 Day Outlook - December 20 to December 26
  • Overall, above 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 upper 30s to low 40s and lows in the mid to upper 20s.
Weekend
  • Mostly dry. Low clouds and fog developing.
  • Highs in the upper 30s to 40s on Saturday, and upper 30s to mid 40s on Sunday.
  • Lows in the upper 20s to mid 30s on Saturday morning, and mid 20s to low 30s on Sunday morning.
Next Week
  • A chance of rain or mix at times beginning on Tuesday, but mainly dry overall.
  • Highs in the mid 30s to mid 40s, and possibly warming later in the week.
  • Lows in the mid 20s to low 30s on Monday morning, and then warmer later in the week.

North Central Washington
  • Normal conditions for this time of the year would be highs in the low to mid 30s and lows in the low to mid 20s.
Weekend
  • Mainly dry, with possible fog development.
  • Highs in the upper 30s to mid 40s on Saturday, and 30s to around 40 on Sunday.
  • Lows in the upper 20s to mid 30s on Saturday morning, and mid 20s to around 30 on Sunday morning.
Next Week
  • A chance of rain or snow at times beginning on Tuesday.
  • Highs in the 30s to around 40, and possibly warming later in the week.
  • Lows in the mid 20s to around 30 on Monday morning, and then warmer 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 20s.
Weekend
  • A chance of showers on Saturday morning, and then mainly dry.
  • Highs in the upper 30s to mid 40s.
  • Lows in the 30s on Saturday morning, and mid 20s to low 30s on Sunday morning.
Next Week
  • A chance of rain or mix at times beginning on Tuesday.
  • Highs in the mid 30s to mid 40s, and warming later in the week.
  • Lows in the mid 20s to low 30s on Monday morning, and then warmer 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
  • Showers possible on Saturday morning, otherwise mainly dry.
  • Highs in the mid 40s to mid 50s.
  • Lows in the upper 30s to mid 40s on Saturday morning, and mid 30s to low 40s on Sunday morning.
Next Week
  • Light rain possible at times beginning on Monday evening or Tuesday.
  • Highs in the mid 40s to mid 50s, and possibly warming later in the week.
  • Lows in the mid 30s to low 40s on Monday morning, and then warmer later in the week.

Washington State University