Fruit Frost Forecast!

Wenatchee and
Okanogan Districts

Time Issued:

10:00 a.m.

Date:

Saturday,  May 31,
2008

2008 BLOSSOM DEGREES,
OMAK

finished

LAST YEAR

NORMAL

2008 BLOSSOM DEGREES,
WENATCHEE

finished

LAST YEAR

NORMAL

Totals computed from Feb. 1, on a base of 43 deg., and NOT adjusted for green tip.

...This is the final Morning forecast
for the 2008 spring frost season...

The last forecast of the season will be issued this evening.

DISCUSSION:  Some wind held temperatures up in the 40s last night, but isolated locations registered temperatures in the upper 30s.

Southerly air flow aloft is bringing clouds northward from California this morning.  This will lead to some showers developing over the mountains later today and spreading into the valleys this evening or tonight.  An isolated thunderstorm is possible as well.   Temperatures tonight should be much warmer as a result.

The upper level weather system offshore will move inland on Sunday and move east of us by Monday morning.  Showers may continue Sunday in the Okanogan and the Cascades then dry weather is expected through Monday.  Another weather system will move in rapidly on Monday night bringing some light rain to the valleys on Tuesday.  The further outlook indicates a continuation of rapidly moving weather systems from the Pacific moving inland through the remainder of the coming week.  Not much rain is seen from most of these, but cool temperatures will continue even beyond next weekend.  The air mass will continue to be cool enough at night for some readings in the upper 30s  in colder spots when wind and clouds are absent.


TODAY AND TONIGHT 
Weather:   Partly cloudy with scattered late afternoon or evening showers and thundershowers, some showers overnight.
Wind:   Variable to southerly 5 to 11 mph becoming westerly 7 to 14 overnight.
Maximum Temp:   77 to 81
Minimum Temp:   Mostly in the 50s.
Protection: Not needed.

SUNDAY AND SUNDAY NIGHT
Weather:   Cloudy periods with scattered showers mainly near Cascades and in the Okanogan valley, afternoon and evening.  Isolated showers overnight Okanogan.
Wind:   Westerly 10 to 20 mph, decreasing overnight.
Maximum Temp:   In the mid and upper 70s.
Minimum Temp:   Mostly in the 40s, but some upper 30s in wind sheltered locations of the Wenatchee district.
Protection: Not needed.

.  

FURTHER OUTLOOK

MONDAY AND MONDAY NIGHT 
Weather:  Clear to partly cloudy daytime.  Increasing clouds late night.
Wind:  Southwest to northwest 8 to 17 mph afternoon and evening becoming 4 to 7 mph late night.
Maximum Temp:   In the mid 70s.
Minimum Temp:  46 to 52.
Protection:   Not needed.

TUESDAY AND TUESDAY NIGHT
Weather: Mainly cloudy with sprinkles daytime. Partly cloudy overnight.
Wind:  West to northwest 10 to 18 mph afternoon and continuing overnight.
Maximum Temp:  68 to 73.
Minimum Temp:   In the 40s, but isolated upper 30s in wind sheltered locations.
Protection:    Not needed.

WEDNESDAY AND WEDNESDAY NIGHT 
Weather:  Mostly fair daytime.  Some high clouds overnight,
Wind:  Westerly 12 to 22 mph late afternoon and evening, lighter overnight. 
Maximum Temp:  70  to 74.
Minimum Temp:   40 to 46.
Protection:  Not needed.


6 TO 10 DAY FORECAST ISSUED ON TUESDAY AND FRIDAY. .

Minimum Temperatures This Morning  May 31

E. Oroville AWN

53

Malaga

Ellisforde AWN

46

George USBR

39

Ellisforde

Wenatchee AWN

46

S. Tonasket AWN

43

E. Monitor

51

Omak Airport

45

Omak USBR

46

Pogue Flat AWN

47

Dryden DOT

48

Methow DOT

46

Manson USBR

42

Brewster AWN

45

N. Cashmere AWN

45

Chief Joe USBR

47

Leavenworth Hydro

40

AWN = WSU Ag Weather Network; data copyright WSU

                                                                             Pest Model  Forecast

Location

yesterday

5/31

6/1

6/2

6/3

6/4

Ellisforde

Max Temp

80

81

74

74

68

69

Cherry FF
Deg Day Accum.

862

885

906

921

937

951

4-Day Fireblight
Deg. Hour Total

933

915

792

662

465

295

Wenatchee

Max Temp

79

78

75

74

70

71

Cherry FF
Deg Day Accum.

975

996

1019

1038

1058

1076

4-Day Fireblight
Deg. Hour Total

898

830

714

605

466

366

Model forecasts produced with Clearwest meteorological forecasts.  Consult WSU Extension Bulletins for further information.

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.

Bob Robinson, Clearwest Agricultural Weather Services

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