AgWeatherNet Weekly Weather Outlook for May 11 to 17, 2013

Continued Hot on Saturday; Cooler Early Next Week

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

The prolonged period of hot weather will finally abate later this weekend, as somewhat more seasonal weather arrives for the coming week. Saturday will be another hot day east of the Cascades, with highs in the upper 80s to mid 90s in central areas and low to mid 80s in eastern areas. However, a bit of cooling will affect the coast, as a weak storm approaches the region. Rain will develop on Saturday night at the coast, before spreading into the north part of interior western Washington on Sunday. As a result, Sunday will be a cooler day in interior western Washington, even as heat hangs on in the east. Although central areas will stay mainly dry and breezy, there will be a chance of showers or thunderstorms on Sunday in eastern areas around Spokane and Pullman. Lows this weekend will continue to be very mild in the 50s and 60s.

A second stronger system will cross Washington on Monday, with more western rain and eastern showers. The main impact of the storm east of the Cascades will be breezy to windy conditions, along with some clouds. Notable cooling should finally spread to eastern areas on Monday, as temperatures drop by 10 or more degrees, or closer to normal. Tuesday and Wednesday should be drier, yet also cooler and more seasonal east of the Cascades. A slight chance of showers will persist on and off next week in western and far eastern areas, although central Washington will remain mostly dry. Another weak weather system may cross the state late in the period. Highs next week should drop into the mid 60s to 70s in central/eastern areas and mid 50s to 60s in western areas, as low temperatures fall into the 40s to mid 50s. Although mid to upper 30s are possible around next Tuesday or Wednesday mornings in the coldest areas, frost protection should not be needed.

Temperatures
  • Above average this weekend and near average next week.
  • Hot on Saturday, especially east of the Cascades.
  • Cooler in western Washington on Sunday.
  • Cooler in eastern Washington on Monday.
  • Slight warming again later next week.

Rainfall
  • Rain on Saturday night at the coast, spreading into interior western Washington on Sunday.
  • A slight chance of showers or thunderstorms in eastern areas on Sunday.
  • Rain re-developing on Monday in western areas, with a chance of showers or thunderstorms in eastern Washington.
  • A chance of showers at times, especially in western areas next week.

Wind
  • Breezy to windy on Sunday and Monday east of the Cascades.
  • Breezy at times, but decreasing winds later next week.

Frost Risk Summary
  • This weekend and next week: Low risk.

8 to 14 Day Outlook - May 18 to May 24
  • Overall, near to above average temperatures and near average rainfall are expected during the 8 to 14 day period.

Important Points about Next Week's Weather

South Central Washington
  • Normal conditions for this time of the year would be highs in the mid 70s and lows in the 40s.
Weekend
  • Mostly sunny on Saturday, and a few clouds and breezy on Sunday.
  • Highs in the mid 80s to mid 90s on Saturday, and 80s to around 90 on Sunday.
  • Lows in the mid 50s to mid 60s on Saturday morning, and mid 50s to 60s on Sunday morning.
Next Week
  • A slight chance of showers and windy on Monday, otherwise partly sunny.
  • Highs in the 70s to low 80s on Monday, and then upper 60s to 70s, and possibly warming later in the week.
  • Lows in the 50s on Monday morning, and then 40s to low 50s, and possibly warming later in the week.

North Central Washington
  • Normal conditions for this time of the year would be highs in the low to mid 70s and lows in the mid to upper 40s.
Weekend
  • Mostly sunny on Saturday, and a few clouds and breezy on Sunday.
  • Highs in the mid 80s to mid 90s on Saturday, and 80s on Sunday.
  • Lows in the mid 50s to mid 60s on Saturday morning, and mid 50s to 60s on Sunday morning.
Next Week
  • A chance of showers and breezy on Monday, otherwise partly sunny.
  • Highs in the 70s to low 80s on Monday, and then upper 60s to mid 70s, and possibly warming later in the week.
  • Lows in the 50s on Monday morning, and then 40s to low 50s, and possibly warming later in the week.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the upper 60s and lows in the low to mid 40s.
Weekend
  • Mostly sunny on Saturday.
  • Partly cloudy and breezy, with a chance of showers and thunderstorms on Sunday.
  • Highs in the 80s on Saturday, and low to mid 80s on Sunday.
  • Lows in the 50s on Saturday morning, and mid 50s to mid 60s on Sunday morning.
Next Week
  • Showers or thunderstorms likely on Monday, with a chance of showers on Tuesday.
  • Highs in the mid 60s to mid 70s on Monday, and then 60s to low 70s, and possibly warming later in the week.
  • Lows in the mid 40s to mid 50s on Monday morning, and then upper 30s to 40s, and possibly warming later in the week.

Western Washington
  • Normal conditions for this time of the year would be highs in the 60s and lows in the 40s.
Weekend
  • Increasing clouds on Saturday.
  • Rain developing at the coast on Saturday night, and spreading inland on Sunday.
  • Highs in the mid 70s to low 80s on Saturday, except mid 60s to low 70s at the coast.
  • Highs in the mid 60s to low 70s, except cooler at the coast on Sunday.
  • Lows in the mid 40s to mid 50s on Saturday morning, and 50s to low 60s on Sunday morning.
Next Week
  • Rain on Monday.
  • A lingering chance of showers into Tuesday.
  • A chance of showers at times later in the week, along with dry periods.
  • Highs in the 60s on Monday and Tuesday, except mid to upper 50s at the coast, and possibly warming later in the week.
  • Lows in the mid 40s to low 50s.

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