AgWeatherNet Weekly Weather Outlook for January 27 to February 2, 2018

Stormy and Becoming Very Mild This Weekend; Cooler Later Next Week

Nic Loyd, Meteorologist, 509-786-9357

An atmospheric river of moisture will bring active and variable weather to the Northwest this weekend. A variety of weather concerns are likely to be associated with this dynamic and changeable pattern. Aside from generally mild and breezy conditions, the main concern will be the prolonged heavy rainfall in northwestern Washington.

The initial push of moisture should bring precipitation to most of the state on Saturday morning. While rain is expected to be the predominant precipitation type in the lowlands, it may begin in the form of snow for north central and northeast Washington. Gusty winds look to be an issue as well. After a brief break later on Saturday, another pulse of rain is forecast to transit the region, although this wave is anticipated to impact mainly the northern part of the state. Later on Sunday, the rain could lift north of most of the state, even though it is possible that northwestern areas remain very wet for this entire interval.

Another main storyline will be very mild temperatures statewide beginning on Saturday night. High temperatures on Sunday and Monday are poised to reach the 50s in many locations, with isolated 60s possible for some sites. Meanwhile, lows are set to drop only into the 40s in many spots. The potential for flooding, landslides, and ponding of water exists due to the rain and also several days of rapid snowmelt. Eventually, rain should return to many places on Monday night and into early Tuesday, as a cold front drops in from the northwest and ultimately ushers the wet conditions out of the region. South central Washington will generally be rain-shadowed, but winds are likely to increase again on Tuesday. Finally, later in the period might be somewhat cooler and only slightly unsettled compared to this weekend. There continues to be disagreement regarding the pattern evolution starting around the middle of next week, with a wide range of meteorological possibilities for the start of February.


Temperatures
  • Generally well above normal, especially for Sunday and Monday.
  • Possibly cooler later next week.

Precipitation
  • Periods of rain, heavy at times in the north, for western Washington through Monday.
  • Snow changing to rain in the mountains this weekend.
  • Rain likely at times this weekend in the east, except beginning as snow in northern areas.
  • Rain likely on Saturday morning in south central Washington, and then a slight chance of rain at times.
  • Becoming drier later in the period.

Wind
  • Breezy to windy at times, especially on Saturday and Tuesday.

8 to 14 Day Outlook - February 3, 2018 to February 9, 2018
  • Overall, near 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 low to mid 40s and lows in the 20s to low 30s.
Weekend
  • Rain likely on Saturday morning, and then a slight chance of rain at times.
  • Highs in the upper 40s to 50s.
  • Lows in the 30s on Saturday morning, and 30s to low 40s on Sunday morning.
Next Week
  • Mostly dry. A slight chance of rain around Monday night/Tuesday morning. Breezy on Tuesday.
  • Highs in the 50s early, and cooler later in the week.
  • Lows in the 30s to mid 40s early, and cooler later in the week.

North Central Washington
  • Normal conditions for this time of the year would be highs in the mid 30s to around 40 and lows in the upper teens to 20s.
Weekend
  • Snow changing to rain on Saturday morning, and then a chance of rain at times.
  • Highs in the mid 30s to 40s.
  • Lows in the upper 20s to low 30s on Saturday morning, and low to mid 30s on Sunday morning.
Next Week
  • A slight chance of rain around Monday night. Breezy on Tuesday.
  • Highs in the mid to upper 40s early, and cooler later in the week.
  • Lows in the low to mid 30s early, and cooler later in the week.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the mid 30s to mid 40s and lows in the mid 20s to around 30.
Weekend
  • Rain likely at times, except starting as snow in the north.
  • Highs in the 40s to low 50s on Saturday, and mid 40s to low 50s on Sunday.
  • Lows in the low to mid 30s on Saturday morning, and 30s to low 40s on Sunday morning.
Next Week
  • Rain likely early in the week, and then a slight chance of rain at times.
  • Highs in the upper 40s to mid 50s on Monday, and cooler later in the week.
  • Lows in the mid 30s to mid 40s on Monday morning, and cooler later in the week.

Western Washington
  • Normal conditions for this time of the year would be highs in the mid 40s to low 50s and lows in the 30s to around 40.
Weekend
  • Rain likely early on Saturday. Heavy rain in the north on Sunday, with drier conditions possible in the south.
  • Highs in the upper 40s to low 50s on Saturday, and 50s on Sunday.
  • Lows in the upper 30s to mid 40s on Saturday morning, and low to mid 40s on Sunday morning.
Next Week
  • Rain or showers likely early in the week, and then a slight chance of rain at times.
  • Highs in the mid to upper 50s on Monday, and then cooler.
  • Lows in the 40s on Monday morning, and cooler later in the week.

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