Sunday, August 20, 2017

Weather & Climate Data


Weather observation and data for
Oroville, WA and vicinity.

WSU - Ag Weather Network - East Oroville
Longest period with no precipitation:
2014 = 25 days
2015 = 34 days
2016 = 29 days
2017 = 72 consecutive days into August
            w/o precipitation and counting.

INFO: Weather data is observed and collected on
a "weather" year starting on October 1st thru
September 30th.

CoCoRaHS weather data for WA-OK-5
Readings are usually taken at 6:00 a.m.

(Month Data page link above is updated daily.)

* = Value may be adjusted.

BURN BAN IN EFFECT! - Fire Weather Watch issued!
Even running a chainsaw in the forest is now banned!

Sun   57*     Light overcast to the east.
Sat    62  82 Partly cloudy. Light air.
                    Relative Humidity - 39%
                    Day 6 w/o Precip. 
Fri     60  86 Mostly clear sky. (No smoke.)
                    Relative Humidity - 39%
                    Day 5 w/o Precip. 
Thu   64  88 Light air. Clear. (No smoke.)
                    Relative Humidity - 31%
                    Day 4 w/o Precip. 
Wed  58  88 Calm & Clear. No smoke.
                    Relative Humidity - 34%
                    Day 3 w/o Precip. 
Tue   58  84 Calm w/some smoke in the sky.
                    Relative Humidity - 36%
                    Day 2 w/o Precip. 
Mon  56  81 Clear Skies. Calm. No smoke!
                    Relative Humidity - 35%
                    Day 1 w/o Precip. 
Sun   68  83 Clear Skies. No smoke!
                    Light drizzle @6:30 a.m.
                    Relative Humidity = 41%   
                    PRECIP. = .01
                                                                
March - May = 7.58 inches or 49.2%
April - May precip. = 5.89 inches or 39.4%
of 2016-17 precipitation.

August Precipitation
1/17 = 5.9%
Precip. of .01 + SWE of 0.00 = .01
Max. Precip. in 24 Hrs. = .01
23 consecutive days w/o precip.

WA-OK-5 - 2017
70/229 = 30.6% 
Precip. of 8.86 & SWE of 1.42 = 10.28
31 days in a row w/o precip./swe.
Max. Precip. in 24 Hrs. = .93
Max. SWE in 24 Hrs. = .39
Snowfall to date 16.9 inches.

WA-OK-5 - 2016
118/366 = 32.2%
Precip. & SWE = 13.50 + 1.25 = 14.75
Max. Precip. in 24 Hrs. = .60
Max. SWE in 24 Hrs. = .31
The 3rd wettest year in the past 17.

CoCoRaHS 2016-17 (Oct.-Sept.)
115/319 = 36.1%  Precipitation/SWE.
Precip. of 13.62 + SWE of 1.79 = 15.41
Max. Precip. in a 24 Hr. period = .93 inches.
Max. 31 days in a row w/o precipitation. 
Max. SWE in a 24 Hr. period = .21 inches.
Total snowfall = 26.1 inches or 66.29 CM

CoCoRaHS 2015-16 (Oct.-Sept.)
109/366 = 29.8%  Precipitation/SWE.
Precip. of 13.49 + SWE of 1.91 = 15.38
                       or
CoCoRaHS 2014-15 (Oct.-Sept.)
Yearly: 10.32 + 2.09 = 12.41
                       or
CoCoRaHS 2013-14 (Oct.-Sept.)
Yearly: 8.30 + 21.27 = 9.57

WSU-AWN WINDRUN:
August:     High    65.6  - Low   22.8 Avg. =  47.3
Year 2017: High: 244.5 - Low:  12.1 Avg. =  71.4*
   (*Some WSU-AWN data is missing for 2017)
Year 2016: High: 249.4 - Low:  9.9  Avg. =   89.5
Year 2015: High: 375.2 Low: 20.8  Avg. = 101.4
Year 2014: High: 354.1 - Low: 16.2. Avg. = 104.3
Year 2013: High: 259.2 - Low: 21.6. Avg. =   98.3
Year 2012: High: 231.7 - Low: 18.9. Avg. =   97.9
Year 2011: High: 286.3 - Low: 38.0. Avg. = 105.5

Monthly Condition:
August: Smokey skies from forest fires. HOT & DRY!
July:    High temp at 99. 31 consecutive days w/o Precip.
June:  .15 in one day! Total to date: .49 of an inch.
             High temp at 94.
May:   2.09 inches of precip! .77 in one day!
           We are at Day 10 in a row w/o precipitation.
April:  The rain came after 6 days w/o precip.
     .93 in one day. 3.80 inches of precip. for the month!
            The wettest month in the 2016-17 Weather year.
March:   Ice melted on the lake on 3/25.

Snowfall and SWE (snow/water equivalent)
Regular snowfall readings are taken from
October 1st through March 31st.
2016-17 =  26.1 inches or 66.3 cm. (2)
2015-16 = 19.2 inches or 48.8 cm. (3)
2014-15 =   9.9 inches or 25.2 cm. (6)
2013-14 = 14.3 inches or 36.3 cm. (5)
2012-13 = 31.9 inches or 81.0 cm. (1)
2011-12 = 16.6 inches or 44.7 cm. (4)
2010-11 =   9.1 inches or 25.7 cm. (7)