AgWeatherNet Weekly Weather Outlook for April 20 to 26, 2013

Frost on Monday Morning; Becoming Warmer Next Week

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

The frost risk will be high on Monday morning, with low temperatures east of the Cascades ranging from the mid 20s in colder, low lying areas to the 30s on hilltops and slopes. Although there should be isolated frost in the colder areas on Sunday morning, wind will keep many areas above freezing. By Tuesday morning, areas of frost should continue, although some areas will remain above freezing.

Otherwise, the main headline for next week will be a transition to a potentially prolonged period of warmer weather. With much of Washington likely to rise into the 70s by mid week, it should be the warmest weather since the April 1 heat wave. There could be a couple of days around the early or middle part of next week when high temperatures in western Washington are even warmer than central Washington. Sunny skies and mainly calm conditions are expected next week, although cooler marine air and some clouds could invade the coast late in the period, as the core of the warmth pushes into eastern Washington. The main weather concern next week will be increasing stream levels due to rapid snow melt in the mountains.

Before the heat arrives, however, we will need to navigate a relatively cool and slightly unsettled weekend. There will be a chance of showers this weekend in western and eastern areas, although central Washington will be mainly dry and breezy. Highs will be in the 50s to mid 60s, with lows cooling from the upper 30s to 40s on Saturday morning to the upper 20s to mid 30s on Monday morning.

Temperatures
  • Slightly below normal this weekend.
  • Warming to well above normal state wide by mid week, especially during the day.

Rainfall
  • Scattered showers on Saturday in western Washington, with a slight chance of showers on Sunday.
  • A chance of showers in eastern areas around Spokane and Pullman this weekend.
  • Mostly dry in central Washington this weekend.
  • Dry statewide next week.

Wind
  • Breezy east of the Cascades this weekend.
  • Mainly light wind next week, except at the coast.

Frost Risk Summary
  • This weekend: Low risk on Saturday morning, and moderate risk on Sunday morning.
  • Next week: High risk on Monday morning, and moderate to high risk on Tuesday morning, and then low risk thereafter.

8 to 14 Day Outlook - April 27 to May 3
  • Overall, above average temperatures and below average precipitation 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 upper 60s to around 70 and lows in the upper 30s to low 40s.
Weekend
  • Mostly sunny and breezy.
  • Highs in the 60s on Saturday, and mid 50s to mid 60s on Sunday.
  • Lows in the upper 30s to mid 40s on Saturday morning, and 30s to low 40s on Sunday morning.
Next Week
  • Sunny.
  • Highs in the upper 50s to 60s on Monday, and warming into the 70s to low 80s by mid to late week.
  • Lows in the upper 20s to mid 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 mid to upper 60s and lows around 40.
Weekend
  • Partly sunny and breezy.
  • Highs in the upper 50s to mid 60s on Saturday, and mid 50s to low 60s on Sunday.
  • Lows in the upper 30s to mid 40s on Saturday morning, and 30s to low 40s on Sunday morning.
Next Week
  • Sunny.
  • Highs in the mid 50s to mid 60s on Monday, and warming into the upper 60s to mid 70s by mid to late week.
  • Lows in the upper 20s to mid 30s 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 low 60s and lows in the upper 30s.
Weekend
  • A chance of showers and breezy.
  • Highs in the 50s on Saturday, and upper 40s to low 50s on Sunday.
  • Lows in the upper 30s to low 40s on Saturday morning, and 30s on Sunday morning.
Next Week
  • Sunny.
  • Highs in the low to mid 50s on Monday, and warming into the mid 60s to low 70s later in the week.
  • Lows in the mid 20s to mid 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 low 60s, except upper 50s at the coast, and lows in the low to mid 40s, except around 40 near Olympia.
Weekend
  • A chance of showers on Saturday.
  • Partly sunny, with a slight chance of showers on Sunday.
  • Highs in the 50s on Saturday, and mid 50s to low 60s on Sunday.
  • Lows in the 40s on Saturday morning, and mid 30s to mid 40s on Sunday morning.
Next Week
  • Mostly sunny.
  • Highs in the upper 50s to mid 60s on Monday, and warming into the 70s to low 80s by mid to late week.
  • Lows in the 30s on Monday morning, and then warmer later in the week.

Washington State University