Yakima Valley/Central Basin Forecast

Date Issued: 2021-04-12 17:35:21 (viewed 225 times)

Discussion:

Overnight lows are to be significantly warmer for most tonight compared to last night even though temps aloft remain apporx the same as well as dew points remaining generally in the low teens. An increase in winds throughout the course of the evening will continue through the overnight as high pressure continues to build to the NE and low pressure to the S/SW of the state. This means wind direction will continue to be N/NE at the surface. Skies are to be mostly clear with a few transient high clouds possible. Based on temps aloft alone, the potential overnight low looks to be near 25 degrees with exceptionally low dew points again pulling that potential to 20 degrees or less. With strong N/NE winds however, it is anticipated that most locations will remain around mid 30s and warmer. Some of the cold locations/locations sheltered from a N/NE wind stand to see temps drop into the low 30s, possibly upper 20s in a few particularly sheltered spots. Temperatures will again fluctuate a few degrees up and down through the overnight as winds mix the surface layer. Locations somewhat sheltered will notice this effect most as winds wont be able to mix as consistently as more exposed locations. With surface gradients continuing to tighten through the overnight, surface winds are expected to continually increase. This may seem to indicate that more exposed locations will realize the overnight low more around midnight or 0100 (even if it doesn't drop below 32, which should be the case for most) while winds remain lower (relatively speaking) and radiative loss has had time to cool the surface. More sheltered locations That do reach 32 or cooler may expect to realize this near midnight-0100 as well, with increasing winds overnight fluctuating the temperatures a few degrees up or down from there while generally maintaining low 30s or warmer, maybe a few dips into the upper 20s. Inversion conditions will be weak but cold weather protection should be limited to those with locations that are wind sheltered under a N/NE wind.

Tuesday looks to be dry and exceptionally windy with NE winds. Dew points will continue to remain in the low to mid teens and skies will be mostly sunny/clear. Temps aloft look to generally remain the same with a continued overnight potential based on them alone near 25, and closer to 20 or less once dew points are factored in. But with NE winds also expected to remain breezy/windy through the overnight, anticipate observed temps Tuesday night to be very similar at all locations to what verifies tonight (Monday).

Breezy conditions are expected to continue Wednesday, Wednesday night, and Thursday. Areas that are well sheltered under N/NE winds should monitor conditions in case a shallow temperature inversion develops to bring temperatures below freezing. Potential minimums for Wednesday night are around the upper 20s, but it’s not likely that this will be reached. Warming temperatures in the Canadian Prairies will weaken the surface high pressure there allowing winds to become lighter Thursday night, but still enough to promote ample surface mixing. Temperatures Thursday night look to remain warm thanks to warming temperatures aloft placing potential minimums around the mid 30s. Temperatures aloft continue to warm Friday so that potential minimums Friday night are closer to 40 degrees. Dew points are still progged to rise into the low 20s by Wednesday night and into the mid 20s by Thursday along with the warmer air aloft moving in from the NW. This will keep the indicated potential minimum low temps from being pulled cooler and overnight lows should generally remain safe for most, even under clear skies.

NOTE: Please see our online form under 'Report Frost'. These submissions will GREATLY help us fine tune our forecasting procedure and help us provide the most accurate forecasts possible.

NOTE: 'Cigs' in the tonight forecast below indicate the ceiling, the height above ground level at which cloud cover becomes broken. Ex: Few clouds at 5000ft, scattered cloud cover at 10000ft, broken cloud cover at 15000ft = Cigs 15000ft, even though there are some clouds present at lower heights above ground.

Yakima Valley:

- The 5 pm PDT 3500 foot wind at Rattlesnake Mountain was northeast at 29 mph, gusting to 46 mph.
- The 5 pm PDT temperature at Yakima Airport was 59 degrees with a dew point of 10 degrees.

Tonight

Weather: Dry condtions expected. Mostly clear.
Wind: N/NE breezy to windy, becoming near 20mph with a few higher gusts.
Min Temp: Mostly mid 30s and warmer. Some cold/sheltered spots low 30s/dipping into upper 20s.
Protection: Needed for those in the colder locations
Ceiling or Inversion: Weak. No cig.

Tuesday and Tuesday Night

Weather: Dry conditions expected. Mostly sunny/clear.
Wind: NE and windy, becoming near 25mph with a few gusts 45+.
Max Temp: Low 60s
Min Temp: Mostly mid 30s and warmer. Some cold/sheltered spots low 30s/dipping into upper 20s.
Protection: Needed for those in the colder locations

Further Outlook
Wednesday and Wednesday Night

Weather: Dry conditions expected. Mostly sunny/clear.
Wind: N/NE and breezy to windy
Max Temp: Upper 60s
Min Temp: Mid 30s to near 40.
Protection: Should not be needed.

Thursday and Thursday Night

Weather: Dry conditions expected. Mostly sunny/clear.
Wind: Breezy during the day, becoming light overnight.
Max Temp: Near 70
Min Temp: Mid 30s to low 40s.
Protection: Should not be needed.

Friday and Friday Night

Weather: Dry conditions expected. Mostly sunny/clear.
Wind: Generally light.
Max Temp: Low 70s
Min Temp: Mid 30s to low 40s.
Protection: Should not be needed.

Key Station Forecasts (2021-04-13 00:00:00)
Yakima Airport32Wapato.SE31
Gromore (CW)32W.Wapato (CW)30
Summitview Ext. (CW)SAFLombard Loop (CW)AF
CowicheAFBuenaAF
Tieton.NAFCherry HillAF
E.Tieton (CW)AFSunnyside Airport31
Naches Hghts (CW)SAFGrandviewAF
NachesAFProsser.N30
Gleed.NE (CW Gleed)SAFWhitstran (CW)28
Selah-Speyers (CW)28Benton CityAF
Ponoma31South KennewickAF
Moxee.N (CW Moxee)AFE.Kennewick (CW)AF
N.Wapato (CW)AF100 CirclesAF
All Stations are AgWeatherNet Stations
(CW) = Indicates an Absorbed Clearwest Station
(CW XXX) = Indicates an Absorbed Clearwest Station and Original Name of Clearwest Station
SAF = slightly above 32 (33 or 34); AF = above 32 (35 or higher)

Central Basin:

- The 5 pm PDT temperature at Grant County International Airport in Moses Lake was 59 degrees with a dew point of 17 degrees.

Tonight

Weather: Dry condtions expected. Mostly clear.
Wind: N/NE breezy to windy, becoming near 20mph with a few higher gusts.
Min Temp: Mostly mid 30s and warmer. Some cold/sheltered spots low 30s/dipping into upper 20s.
Protection: Needed for those in the colder locations
Ceiling or Inversion: Weak. No cig.

Tuesday and Tuesday Night

Weather: Dry conditions expected. Mostly sunny/clear.
Wind: NE and windy, becoming near 25mph with a few gusts 45+.
Max Temp: Low 60s
Min Temp: Mostly mid 30s and warmer. Some cold/sheltered spots low 30s/dipping into upper 20s.
Protection: Needed for those in the colder locations

Further Outlook
Wednesday and Wednesday Night

Weather: Dry conditions expected. Mostly sunny/clear.
Wind: N/NE and breezy to windy
Max Temp: Upper 60s
Min Temp: Mid 30s to near 40.
Protection: Should not be needed.

Thursday and Thursday Night

Weather: Dry conditions expected. Mostly sunny/clear.
Wind: Breezy during the day, becoming light overnight.
Max Temp: Near 70
Min Temp: Upper 30s to low 40s.
Protection: Should not be needed.

Friday and Friday Night

Weather: Dry conditions expected. Mostly sunny/clear.
Wind: Breezy areas during the day, lighter overngiht.
Max Temp: Low 70s
Min Temp: Upper 30s to low 40s.
Protection: Should not be needed.

Key Station Forecasts (2021-04-13 00:00:00)
Moses Lake AirportAFQuincyAF
Radar HillAFMattawa.EAF
RingoldSAFFrenchmanAF
Pasco AirportSAFRoyal City.EAF
FishhookAFGeorge (USBR)SAF
All Stations are AgWeatherNet Stations
(CW) = Indicates an Absorbed Clearwest Station
(CW XXX) = Indicates an Absorbed Clearwest Station and Original Name of Clearwest Station
SAF = slightly above 32 (33 or 34); AF = above 32 (35 or higher)
Extended Outlook

Extended released on Tue and Fri only.

Oswald/Ingalls

Washington State University