AgWeatherNet Weekly Weather Outlook for December 21 to 27, 2013

Milder With A Chance of Rain Through Tuesday; Drier Later Next Week

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

Unfortunately for those dreaming of a White Christmas, next week’s weather does not look promising. Despite some day to day variability, the “dirty ridge” pattern that has been in place since the end of the arctic outbreak looks to continue for the foreseeable future. As weak disturbances continue to move over the top of the Pacific high pressure ridge and graze Washington, periodic chances for light rain will continue through early next week in western Washington. The most organized system will cross the region on Monday, bringing steady rain to western Washington, but mainly breezes to eastern areas.

By next Tuesday, subtle changes are likely to occur. The ridge will strengthen slightly and move almost directly over the state, leading to entirely dry weather and potentially more stagnant conditions for several days. The ridge will not be strong or persistent enough to cause any major, long-term air quality issues. However, calmer weather is expected later next week. While it is likely that the mountains will be relatively warm, limited mixing may lead to cooler than expected conditions, especially in the eastern lowlands. However, without any cold, dry air to trap at the surface, near to above average temperatures are a good bet for next week. By the end of the week, rain may begin to clip the north coast once again.

The largest uncertainty concerns the potential development of low clouds and fog later next week. As always, temperatures in foggy areas would be somewhat stable, while clear areas would experience larger diurnal swings. For next weekend and beyond, there is great uncertainty in the details, but generally uneventful weather may continue into the New Year. Overall, no cold outbreaks or strong storms are expected during the period, as mild temperatures, and somewhat, but not entirely, dry weather is likely.

Temperatures
  • Near to above average statewide through the period.
  • Warming through Monday, especially in the east, and then cooler by the middle of next week.
  • Possibly very mild at the coast during the middle to latter part of next week.

Precipitation
  • Periodic light rain in western Washington and in the mountains this weekend and early next week, and especially on Monday.
  • Mainly dry in central and eastern areas through early next week.
  • Mainly dry statewide beginning next Tuesday.

Wind
  • Breezy at times through early next week, and then calmer later next week.

Frost Risk Summary
  • This weekend: Moderate to high risk on Saturday, and low to moderate risk on Sunday.
  • Next week: Low to moderate risk early, and increasing by mid week.

8 to 14 Day Outlook - December 28 to January 3
  • Overall, near to above average temperatures and below 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 and lows in the 20s.
Weekend
  • Partly sunny.
  • Highs in the mid 30s to mid 40s on Saturday, and upper 30s to 40s on Sunday.
  • Lows in the mid 20s to mid 30s on Saturday morning, and upper 20s to mid 30s on Sunday morning.
Next Week
  • Partly sunny. Patchy fog and low clouds later in the week.
  • Highs in the 40s to low 50s early, and cooler by mid week.
  • Lows in the upper 20s to 30s early, and cooler by mid 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 20s.
Weekend
  • Partly sunny, with a slight chance of light rain or snow.
  • Highs in the upper 20s to 30s on Saturday, and mid 30s to low 40s on Sunday.
  • Lows in the 20s to low 30s on Saturday morning, and mid 20s to low 30s on Sunday morning.
Next Week
  • A slight chance of rain on Monday, but mainly dry next week.
  • Highs in the mid 30s to mid 40s early, and cooler by mid week.
  • Lows in the upper 20s to mid 30s early, and cooler by mid 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 slight chance of rain or snow.
  • Highs in the upper 20s to 30s on Saturday, and mid 30s to low 40s on Sunday.
  • Lows in the mid to upper 20s on Saturday morning, and mid 20s to low 30s on Sunday morning.
Next Week
  • A chance of rain on Monday, but mainly dry next week.
  • Highs in the mid 30s to mid 40s on Monday, and cooler by mid week.
  • Lows in the low to mid 30s early, and cooler by mid week.

Western Washington
  • Normal conditions for this time of the year would be highs in the mid to upper 40s and lows in the 30s.
Weekend
  • Light rain likely in the north, with a chance of rain in the south.
  • Highs in the mid 40s to low 50s.
  • Lows in the upper 30s to mid 40s.
Next Week
  • Rain on Monday, and then drier by mid week.
  • A slight chance of rain on the north coast late in the week.
  • Highs in the mid 40s to low 50s.
  • Lows in the upper 30s to mid 40s early, and cooler by mid week.

Note: AgWeatherNet will not issue a weekly weather outlook on Friday, December 27 due to the Christmas Holiday. Please look for the next weekly outlook on Friday, January 3, 2014. On behalf of the AgWeatherNet team, we would like to wish you a Merry Christmas and a Happy New Year!

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