THIS WILL BE THE FINAL FROST FORECAST OF THIS SEASON.

Discussion:  The upper level low offshore will move slowly inland overnight and Sunday and on east on Monday.  A band of clouds and showers is moving northward into southern Washington this evening and some areas will get showers overnight.  This moisture band will move on north Sunday with clearing along with cooler air.  With less clouds expected Sunday night, wind sheltered cold spots in the upper valley could fall into the upper 30s Monday morning.   Another Pacific front will move in early Tuesday and bring a cloud cover for Monday night along with a little rain in some areas Tuesday.  Then a cooler westerly flow will develop through the rest of the week.  Temperatures in colder, wind sheltered locations would have potential to drop to the low to mid 30s on any night from Wednesday into next weekend if clouds are not present.

The 2pm PDT 3500 foot wind at Rattlesnake Ridge was northeast at 10 mph.

The dew point at the Yakima Airport Key Station at 4pm PDT was 41degrees with a temperatures of 76.

YAKIMA VALLEY

TONIGHT
Weather:  Clouds with chance of showers.
Minimum Temp:  In 50s to low 60s.
Protection:  Not needed.
Ceiling or inversion:  Moderate.

Key Station Forecasts
Yakima Airport	AF	S.E.Wapato	AF
Gromore	AF	W. Wapato	AF
Summitview Ext.	AF	Lombard Loop	AF
Cowiche	AF	Buena Heights	AF
N. Tieton	AF	Cherry Hill*	AF
E. Tieton	AF	Sunnyside Airport Ranch	AF
Naches Heights	AF	Grandview	AF
Naches	AF	N. Prosser	AF	To see temperature graphs for selected stations for the previous weeks, click. HERE Graphs courtesy of Yakima Pomological Club
Gleed	AF	Whitstran	AF
Selah	AF	Benton City	AF
Pomona	AF	S. Kennewick	AF
Moxee	AF	E. Kennewick	AF
N. Wapato	AF	Hundred Circles AWN	AF

* Note - Cherry Hill Key Station is located about 1 mile southeast of Granger.
SAF = slightly above 32 (33 or 34); AF = above 32 (35 or higher)
AWN = WSU Ag Weather Network

CENTRAL BASIN DISTRICT

TONIGHT
Weather:  Increasing clouds with chance of showers.
Minimum Temp:  50s to low 60s.
Protection:  Not needed.
Ceiling or inversion:  Moderate.

The 4pm temperature at Moses Lake was 80 degrees with a dewpoint of 31degrees.

Key Station Forecasts
Quincy AWN	AF	Basin City AWN	AF
Mattawa AWN	AF	Pasco Airport	AF
Royal City AWN	AF	Fishhook AWN	AF
Moses Lake AWN	AF

SAF: slightly above 32 degrees (33 or 34).  AF: above 32 degrees (35+)
AWN = WSU Ag Weather Network

YAKIMA VALLEY & CENTRAL BASIN

SUNDAY AND SUNDAY NIGHT
Weather:   Becoming partly cloudy with a few showers near mountains and mostly clear and cooler overnight.  Windier.
Wind:  Westerly 8 to 18 mph in areas morning, increasing to 12 to 24 mph afternoon and evening, decreasing in areas overnight.
Maximum Temp:  Near 70 Upper Valley to upper 70s warmer areas Lower Valley/Basin.
Minimum Temp:  35-40 colder wind sheltered locations to 40-50 elsewhere.
Protection:  Probably not needed.

MONDAY AND MONDAY NIGHT
Weather:   Partly cloudy during the day and increasing clouds overnight.
Wind:  Southwest to west 7 to 15 mph.
Maximum Temp:  In 70s most areas.
Minimum Temp:  40s to lower 50s.
Protection:  Not expected to be needed.

TUESDAY THROUGH THURSDAY NIGHT
Weather:  Mostly cloudy with chance of a little rain some areas Tuesday, becoming partly cloudy Tuesday night.  Partly cloudy, generally windier and cooler Wednesday and Thursday.
Wind:  Westerly 15 to 20 mph during the day through this period.
Maximum Temp:  Upper 60s to low 70s most areas.
Minimum Temp:  Potential for low to mid 30s in coldest areas of Yakima valley in absence of wind and clouds, with most areas holding in upper 30s and 40s.
Protection:  Should not be needed most areas but growers with cold spots will need to watch conditions through next weekend.

Thanks also to co-sponsors:
Yakima Valley Growers-Shippers Association
Northcentral Washington Fieldmans Association
Wenatchee Valley Traffic Association
Washington State Hort Association

Copyright 2008 Clearwest, Inc. No part of this publication may be reproduced for commercial purposes.
Jim Holcomb, Clearwest Agricultural Weather Service.
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