Monday, December 18, 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 = 103 consecutive days in to September.
            w/o precipitation.

INFO: Weather data is observed and collected on
a "weather" year starting on October 1st thru
September 30th.
This is the 2018 CoCoRaHS Weather Year.

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.
Mon 34         Rained overnight. Pricep. = .01
Sun  31  34  Rained overnight. Pricep. = .01
                    Snowed overnight. SWE = .02
                    Snowfall = 1/4 inch.
Sat  30  32   Overcast. Calm.
                     Day 1 w/o precip./SWE.
Fri    31  35  Overcast. Light breeze.
                    Snow flurries. = .01 SWE.
Thu  33  35  Overcast. Light air.
                    All snow is melted.
                    Day 1 w/o precip./SWE.
Wed 31  39  Some wind. & overcast.
                    Trace = SWE = 1/2 inch new snow.
Tue  31  32  Dead calm & overcast.
                    Day 9 w/o precip./SWE.
Mon 30  32 Some wind. Some sun.
                    Day 8 w/o precip./SWE.

March - May = 7.58 inches or 49.2%
April - May alone precip. = 5.89 inches or 39.4%
July - Sept. 2017 =    .11 inches on  5/92 days or 5.4%.
July - Sept.  2016 = 1.42 inches on 15/92 days or 16.3%.
July - Oct. 2017 (4 mo.) = .67 inches on 13/123 days or 10.6%.

December Precipitation
3/14 = 21.4%
Precip. .23 + SWE of .10 = .33
Max. Precip. in 24 Hrs. = .20
7 consecutive days w/o precip/swe.
Total snowfall to date: 2.25 inches.

WA-OK-5 - 2017
96/348 = 27.6%
Precip. of 12.23  & SWE of 1.64 = 13.87
31 days in a row w/o precip./swe.
Max. Precip. in 24 Hrs. = .93
Max. SWE in 24 Hrs. = .39
Snowfall to date 18.90 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 2017-18 /Precip. Year 2018 (Oct.-Sept.)
23/75 = 30.7% Precipitation/SWE.
Precip. of 3.27 + SWE of .22 = 3.49
Max. Precip. in a 24 Hr. period = .43
Max. 12 days in a row w/o precipitation. 
Max. SWE in a 24 Hr. period = .10 inches.
Total snowfall = 2.25 inches

CoCoRaHs 2016-17 /Precip. Year 2017 (Oct.-Sept.)
118/365 = 32.3%  Precipitation/SWE.
Precip. of 13.72 + SWE of 1.79 = 15.51
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 /Precip Year 2016 (Oct.-Sept.)
Yearly: 13.49 + 1.89 = 15.38
109/366 = 29.8%  Precipitation/SWE.

CoCoRaHS 2014-15 /Precip Year 2015 (Oct.-Sept.)
Yearly: 10.32 + 2.09 = 12.41
88/365 = 24.1% Precipitation/SWE.
                 
CoCoRaHs 2013-14 /Precip Year 2014 (Oct.-Sept.)
Yearly: 8.30 + 21.27 = 9.57
   # days out of 365 =   ?? %

WSU-AWN WINDRUN:
December: High   70.6  -  Low   2.9  Avg. =   24.3
Year 2017*: High: 244.5 - Low:   2.9  Avg. =   62.1
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

December:  1.5 inches of new snow! Plus some rain.
                     High Pressure "Funk."
November: 1/2 inch of snow already! Plus rain.
                    2nd wettest month in 2017
October:  Cooling down & .56 of rain for the month.
April:  3.8 inches of precipThe 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.

2017-18 =  1.5 inches to date.
2016-17 =  26.1 inches or 66.3 cm.(2)
(For more data - see Precipitation Page above.)

Saturday, December 16, 2017

CoCoRaHS Weather Year

Starts October 1st through the following September 30th. We are 11 weeks in out of 52 or 21.2%.

Tuesday, November 14, 2017

Photo of the month - November 2017
Snow arrived early.