AgWeatherNet Weekly Weather Outlook for June 16 to June 22, 2018

A Chance of Eastern Showers This Weekend; Major Heat Wave Next Week

Nic Loyd, Meteorologist, 509-786-9357

In a modest reversal of our typical meteorological setup, low pressure will bring a chance of showers and isolated thunderstorms to central and eastern Washington on Saturday, along with breezy conditions. Meanwhile, the western part of the state looks to be mainly dry with quickly warming temperatures. The eastern clouds and moisture are likely to cause warming lows yet (temporarily) moderated afternoon highs.

By Sunday, light breezes may linger in the east, but the retreating clouds and shower chances could be relegated to far southeastern Washington as the system departs the region. Otherwise, the warming trend is anticipated to spread eastward later this weekend.

A major heat wave is expected for next week, as temperatures should continue to climb into at least the middle of next week. Mainly sunny and very hot weather is generally predicted, as highs are eventually set to surpass 100 degrees in central Washington, with 90s and a few 80s elsewhere. The immediate coast may be spared from the extreme heat for much of this interval, but otherwise the abnormal warmth is forecast to be widespread across the region.

Some models are showing the heat persisting into next weekend (or beyond), which means that there is presently no definite end date on this upcoming prolonged hot spell. Now would be a good time to make plans for ensuring not only human safety but also crop health in terms of heat and water stress prevention. The fire danger is also poised to increase, as the heat seems to be here to stay for a while.


Key Points:

  • Becoming warmer this weekend, and breezy in the east.
  • A chance of showers or thunderstorms on Saturday east of the Cascades.
  • Major heat wave next week.


Temperatures
  • Warming this weekend, initially in the west.
  • Becoming hot next week.

Precipitation
  • A chance of showers or thunderstorms for the Cascades eastward on Saturday, and possibly in southeastern WA on Sunday.
  • Mainly dry next week.

Wind
  • Breezy this weekend in the east.

8 to 14 Day Outlook - June 23, 2018 to June 29, 2018
  • Overall, 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 low to mid 80s and lows in the upper 40s to 50s.
Weekend
  • A chance of showers on Saturday.
  • Highs in the mid 70s to low 80s on Saturday, and 80s to around 90 on Sunday.
  • Lows in the upper 40s to 50s on Saturday morning, and 50s to low 60s on Sunday morning.
Next Week
  • Mostly dry.
  • Highs in the upper 80s to mid 90s on Monday, and then warmer.
  • Lows in the mid 50s to mid 60s on Monday morning, and then warmer.

North Central Washington
  • Normal conditions for this time of the year would be highs in the upper 70s to low 80s and lows in the low to mid 50s.
Weekend
  • A chance of showers on Saturday.
  • Highs in the upper 70s to low 80s on Saturday, and mid to upper 80s on Sunday.
  • Lows in the 50s on Saturday morning, and mid to upper 50s on Sunday morning.
Next Week
  • Mostly dry.
  • Highs in the low to mid 90s on Monday, and then warmer.
  • Lows in the upper 50s to mid 60s on Monday morning, and then warmer.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the mid 70s to around 80 and lows in the upper 40s to mid 50s.
Weekend
  • Showers on Saturday, and then mostly dry with a slight chance of showers on Sunday.
  • Highs in the mid 60s to mid 70s on Saturday, and mid 70s to mid 80s on Sunday.
  • Lows in the mid 40s to mid 50s on Saturday morning, and upper 40s to 50s on Sunday morning.
Next Week
  • Mostly dry. A slight chance of showers on Monday.
  • Highs in the upper 70s to 80s on Monday, and then becoming warmer.
  • Lows in the 50s to around 60 on Monday morning, and then becoming warmer.

Western Washington
  • Normal conditions for this time of the year would be highs in the upper 60s to mid 70s, except cooler at the coast, and lows in the upper 40s to low 50s.
Weekend
  • Mostly dry.
  • Highs in the mid 70s to around 80 on Saturday, and 80s on Sunday, except cooler at the coast.
  • Lows in the mid 40s to mid 50s on Saturday morning, and 50s to around 60 on Sunday morning.
Next Week
  • Mostly dry.
  • Highs in the mid 80s to low 90s on Monday, and then warmer, and possibly cooler later in the week.
  • Lows in the mid 50s to low 60s on Monday morning, and then warmer.

Washington State University