AgWeatherNet Weekly Weather Outlook for April 29 to May 5, 2017

Scattered Frost on Saturday Morning; Becoming Much Warmer Next Week

Nic Loyd, Meteorologist, 509-786-9357

In the parlance of American Icon and Hollywood megastar John Wayne, it is going to get warm next week, pilgrim. We all knew that it would happen at some point, and it seems that early May is the chosen moment. At the risk of sounding like Pollyanna, I do strive to highlight realistic but positive aspects of coming weather patterns for all folks. If you have been longing for a taste of early summer, take heart in the fact that it is finally on the way, and should be the warmest weather of the year so far. If you are dreading the heat that will eventually arrive later in the summer, take comfort in the fact that this upcoming warm spell is expected to be rather brief. In any case, some 80s are possible for the first time this year around next Thursday in south central Washington, before a potentially significant cool down comes on the heels of gusty winds.

In the meantime, frost is likely in parts of central and eastern Washington on Saturday morning, and then another windy and showery front is anticipated to pass through the state on Saturday night and Sunday. Thereafter, the aforementioned warming trend is forecast for early next week, even as another system clips Washington while rippling over the top of a building ridge of high pressure. Once the ridge becomes (briefly) established, conditions will become calmer, drier, and much warmer for mid week, especially during the day. Although evaporation and thus watering needs are likely to increase sharply during this interval, it may be a good time for spray applications due to the brief respite from the recent gusty winds. A sharp, windy cold front may lower temperatures again at the end of the period, but eastern areas are forecast to stay warm for most of the week.

Here are the main points to consider concerning the upcoming weather pattern:

  1. Scattered frost is possible under strengthening inversions on Saturday morning, especially east of the Cascades.
  2. Western showers and widespread windy conditions return on Saturday evening and Sunday, respectively.
  3. Much warmer, calmer, and drier days will spread from west to east during the middle to latter part of next week. An estimate for the timing of the peak heat is as follows: Wednesday for the coast, Wednesday or Thursday for the interior west, Thursday or Friday for central WA, and Friday for the east. An estimate for the peak daytime temperatures is as follows: Upper 70s to around 80 for Vancouver, but perhaps only 60s for some coastal and northern parts of western WA; mid 70s to low 80s for north central WA; low to mid 80s for south central WA; and mid to upper 70s for far eastern areas.
  4. A windy cool front is possible late in the period or next weekend, but the details on the timing and degree of cooling are not yet clear.
Temperatures
  • Cool on Saturday morning, and becoming much warmer next week.
  • Possibly much cooler by Friday or next weekend.

Precipitation
  • A chance of mainly western showers from Saturday night to Sunday, and possibly into early next week.
  • A slight chance of mainly western showers at the end of the period.

Wind
  • Breezy to windy on Sunday, and possibly again late next week.

Frost Risk Summary
  • This Weekend: Moderate to high risk on Saturday morning, and low risk on Sunday morning.
  • Next Week: Low to moderate risk early, and then low risk.

8 to 14 Day Outlook - May 6, 2017 to May 12, 2017
  • Overall, near to above average temperatures and near to 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 70s and lows in the upper 30s to 40s.
Weekend
  • Mostly dry.
  • Highs in the mid 60s to low 70s.
  • Lows in the 30s to low 40s on Saturday morning, and 40s on Sunday morning.
Next Week
  • Mostly dry.
  • Highs in the mid 60s to low 70s on Monday, and then becoming much warmer.
  • Lows in the upper 30s to 40s on Monday morning, and then becoming warmer.

North Central Washington
  • Normal conditions for this time of the year would be highs in the upper 60s to around 70 and lows in the low to mid 40s.
Weekend
  • A slight chance of showers on Saturday night, otherwise mostly dry.
  • Highs in the 60s.
  • Lows in the 30s to low 40s on Saturday morning, and 40s on Sunday morning.
Next Week
  • Mostly dry.
  • Highs in the 60s on Monday, and then becoming much warmer.
  • Lows in the upper 30s to 40s on Monday morning, and then becoming warmer.

Eastern Washington
  • Normal conditions for this time of the year would be highs in the 60s to around 70 and lows in the upper 30s to mid 40s.
Weekend
  • Mostly dry on Saturday. A chance of showers beginning on Saturday night.
  • Highs in the upper 50s to mid 60s.
  • Lows in the 30s to low 40s on Saturday morning, and 40s on Sunday morning.
Next Week
  • Mostly dry. A slight chance of showers early in the week.
  • Highs in the mid 50s to mid 60s on Monday, and then becoming much warmer.
  • Lows in the mid 30s to 40s on Monday morning, and then becoming warmer.

Western Washington
  • Normal conditions for this time of the year would be highs in the upper 50s to mid 60s and lows in the 40s.
Weekend
  • Mostly dry early on Saturday. Rain or showers developing later on Saturday.
  • A chance of showers on Sunday.
  • Highs in the mid 50s to mid 60s on Saturday, and mid 50s to low 60s on Sunday.
  • Lows in the mid 30s to mid 40s on Saturday morning, and mid 40s to around 50 on Sunday morning.
Next Week
  • A chance of showers, especially in the north, and mainly early in the week.
  • Highs in the mid 50s to low 60s on Monday, and then becoming much warmer, and possibly cooler later in the week.
  • Lows in the 40s on Monday morning, and then becoming warmer.


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