AgWeatherNet Weekly Weather Outlook for March 2 to 8, 2013

Warm on Saturday; Seasonal Conditions Return Next Week

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

Following a brief taste of April this weekend, early spring weather will return next week. Saturday will be one of the warmest days experienced thus far in 2013, as a mild southwesterly flow pushes highs into the upper 50s to mid 60s in many locations. However, rain will increase late in the day in western Washington, as a storm approaches the region. A cold frontal passage on Sunday morning will usher in showery and breezy conditions, along with a cooler air mass, especially in the mountains. After another break on Monday, a large area of low pressure will setup off the Washington coast on Tuesday. It is unclear whether the system will be close enough to provide much rain to Washington, though it is a good possibility at times in western areas. Although the system will not be very strong, it will be a relatively slow mover that will only gradually traverse the area through mid to late next week. The southerly flow aloft associated with the main storm means that small disturbances will periodically pinwheel around the parent low and into the region. The flow will shift to northwesterly as the low departs later next week. By next Friday, it appears that a ridge of high pressure will build across the Northwest, ushering in at least a brief period of warmer and drier weather next weekend, especially in the south. The ridge may have clouds and moisture riding over the top and into northern Washington, but most areas should be dry by Friday.

By mid to late next week, the large scale pattern will change again, as the flow switches to southwesterly. While rain, potentially heavy, is a possibility in northwest Washington later next week as part of a pineapple express type setup, it is highly uncertain at this time. There is a chance that the coast or northwestern Washington could have heavy rain at times, while much of western Washington remains dry. In any event, areas east of the Cascades would likely be mostly dry later next week. It appears that significant warming is possible late next week or next weekend.

Temperatures
  • Above normal on Saturday.
  • Near normal next week.
  • Possibly warmer late next week and next weekend.

Rainfall
  • Mostly dry early, with rain developing later on Saturday in western Washington.
  • Rain likely on Saturday night, with showers possible on Sunday in western Washington.
  • A chance of rain or showers in eastern Washington, especially on Sunday morning.
  • A chance of rain or showers, especially in western and southern, areas beginning later on Tuesday.
  • Becoming mostly dry later next week.

Wind
  • Breezy to windy on Sunday, especially in central Washington.
  • Breezy at times next week.

Frost Risk Summary
  • This weekend: Low risk.
  • Next week: High risk on Monday morning, and then moderate risk.

8 to 14 Day Outlook - March 9 to March 15
  • High pressure should usher in a period of dry and mild weather next weekend, before a cooler and possibly more active period arrives late in the week two 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 mid 50s and lows in the low 30s.
Weekend
  • Mostly dry, with a slight chance of rain on Saturday night or Sunday morning. Windy on Saturday night and Sunday.
  • Highs in the upper 50s to 60s on Saturday, and 50s on Sunday.
  • Lows in the mid 30s to mid 40s.
Next Week
  • Mostly dry.
  • A slight chance of rain or showers at times from late Tuesday to Thursday.
  • Highs in the 50s early, and then mid 50s to around 60 later in the week.
  • Lows in the mid 20s to low 30s on Monday morning, and then upper 20s to 30s.

North Central Washington
  • Normal conditions for this time of the year would be highs around 50 and lows around 30.
Weekend
  • Mostly dry, with a chance of rain on Saturday night or Sunday morning.
  • Highs in the upper 40s to 50s on Saturday, and mid 40s to low 50s on Sunday.
  • Lows in the 30s to low 40s.
Next Week
  • A slight chance of rain or showers at times from late Tuesday to Thursday, otherwise mostly dry.
  • Highs in the mid 40s to mid 50s.
  • Lows in the 20s to around 30 on Monday morning, and then mid 20s to mid 30s.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the upper 40s and lows in the low 30s.
Weekend
  • Mostly dry on Saturday, and then rain likely on Sunday morning.
  • A chance of showers and breezy later on Sunday.
  • Highs in the upper 40s to mid 50s on Saturday, and upper 30s to mid 40s on Sunday.
  • Lows in the 30s to around 40.
Next Week
  • Mostly dry, with a slight chance of rain or showers from late Tuesday to Thursday.
  • Highs in the mid 40s to mid 50s.
  • Lows in the mid to upper 20s on Monday morning, and then upper 20s to mid 30s.

Western Washington
  • Normal conditions for this time of the year would be highs in the mid 50s and lows in the upper 30s to around 40.
Weekend
  • Mostly dry early, with rain developing later on Saturday. Scattered showers on Sunday.
  • Highs in the 50s on Saturday, and mid 40s to low 50s on Sunday.
  • Lows in the 40s on Saturday morning, and upper 30s to mid 40s on Sunday morning.
Next Week
  • Rain or showers likely at times from Tuesday to Thursday, especially in southern areas.
  • Highs in the upper 40s to mid 50s.
  • Lows in the 30s on Monday morning, and then mid 30s to low 40s.

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