Station Overview Station Location
Station Number WA-OK-12 Latitude 48.433861
Station Name Winthrop 3.3 SE Longitude -120.136483
County Okanogan Elevation (ft) 2202



Month 30 Yr Avg by PRISM Total Prcp Sum Days Covered By All Observations Daily Prcp Sum Daily Observation Count Multiday Prcp Sum Days Covered by Multiday Observations Multiday Observation Count Days With Prcp Days With Trace Total Snowfall Days With Snowfall Days With Snow On Ground
Oct 16 1.04 2.36 22 0.68 6 1.68 16 5 2 0 0.0 0 0
Nov 16 2.23 1.47 19 0.93 4 0.54 15 3 4 0 0.7 1 1
Dec 16 2.57 1.19 29 1.19 29 0.00 0 0 13 2 16.2 13 27
Jan 17 2.26 2.24 30 1.92 19 0.32 11 4 8 0 18.9 8 19
Feb 17 1.49 1.71 28 0.24 3 1.47 25 5 2 1 0.6 3 3
March 17 1.11 0.64 8 0.64 6 0.00 2 1 2 1 8.3 2 6
April 17 0.79 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 17 1.06 1.57 11 1.51 8 0.06 3 1 4 0 0.0 0 0
June 17 1.26 0.29 3 0.29 3 0.00 0 0 3 0 0.0 0 0
July 17 0.74 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 17 0.54 0.00 31 0.00 31 0.00 0 0 0 0 0.0 0 0
Sept 17 0.46 0.03 9 0.03 9 0.00 0 0 1 4 0.0 0 0
Water Year Totals: 15.55" 11.50" 190 days 7.43" 118 4.07" 72 days 19 39 days 8 days 44.7" 27 days 56 days



Days in Water Year Cell Color Key
        Daily Observation with Prcp         Missing Day
        Multiday Observation         Daily/Multiday Observation Conflict

Day of Year Daily Prcp Multiday Prcp
10/1/2016
10/2/2016
10/3/2016
10/4/2016
10/5/2016
10/6/2016
10/7/2016 0.12
10/8/2016 **
10/9/2016 **
10/10/2016 0.22
10/11/2016 0.00
10/12/2016 0.00
10/13/2016 0.00
10/14/2016 0.56
10/15/2016
10/16/2016
10/17/2016 **
10/18/2016 **
10/19/2016 **
10/20/2016 **
10/21/2016 **
10/22/2016 1.02
10/23/2016 **
10/24/2016 **
10/25/2016 0.03
10/26/2016 0.00
10/27/2016 **
10/28/2016 0.40
10/29/2016 **
10/30/2016 0.01
10/31/2016
11/1/2016
11/2/2016
11/3/2016
11/4/2016
11/5/2016
11/6/2016
11/7/2016 **
11/8/2016 **
11/9/2016 **
11/10/2016 **
11/11/2016 **
11/12/2016 **
11/13/2016 **
11/14/2016 0.01
11/15/2016 0.43
11/16/2016
11/17/2016
11/18/2016
11/19/2016 **
11/20/2016 **
11/21/2016 **
11/22/2016 **
11/23/2016 0.46
11/24/2016 0.01
11/25/2016 0.14
11/26/2016 0.35
11/27/2016 **
11/28/2016 0.07
11/29/2016
11/30/2016
12/1/2016
12/2/2016 0.00
12/3/2016 0.01
12/4/2016 0.02
12/5/2016 0.00
12/6/2016 0.10
12/7/2016 0.00
12/8/2016 0.00
12/9/2016 0.08
12/10/2016 0.09
12/11/2016 0.01
12/12/2016 T
12/13/2016 0.00
12/14/2016 0.00
12/15/2016 0.01
12/16/2016 0.00
12/17/2016 0.00
12/18/2016 0.00
12/19/2016 0.10
12/20/2016 0.22
12/21/2016 0.00
12/22/2016 0.00
12/23/2016 0.28
12/24/2016 0.00
12/25/2016 0.00
12/26/2016
12/27/2016 0.11
12/28/2016 0.04
12/29/2016 T
12/30/2016 0.12
12/31/2016 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2017 0.10
1/2/2017 0.00
1/3/2017 0.00
1/4/2017 0.00
1/5/2017 0.00
1/6/2017 0.00
1/7/2017 0.00
1/8/2017 **
1/9/2017 0.32
1/10/2017 **
1/11/2017 **
1/12/2017 **
1/13/2017 0.00
1/14/2017 0.00
1/15/2017 0.00
1/16/2017 0.00
1/17/2017
1/18/2017 0.23
1/19/2017 0.49
1/20/2017 0.08
1/21/2017 0.23
1/22/2017 0.26
1/23/2017 0.39
1/24/2017 0.00
1/25/2017 0.00
1/26/2017 **
1/27/2017 **
1/28/2017 0.00
1/29/2017 **
1/30/2017 0.00
1/31/2017 0.14
2/1/2017 **
2/2/2017 **
2/3/2017 **
2/4/2017 **
2/5/2017 **
2/6/2017 **
2/7/2017 **
2/8/2017 **
2/9/2017 **
2/10/2017 **
2/11/2017 **
2/12/2017 1.01
2/13/2017 **
2/14/2017 0.00
2/15/2017 0.19
2/16/2017 **
2/17/2017 0.23
2/18/2017 **
2/19/2017 0.05
2/20/2017 0.05
2/21/2017 **
2/22/2017 **
2/23/2017 **
2/24/2017 **
2/25/2017 **
2/26/2017 **
2/27/2017 0.18
2/28/2017 T
3/1/2017 **
3/2/2017 0.00
3/3/2017 0.00
3/4/2017 0.00
3/5/2017 0.25
3/6/2017 T
3/7/2017 0.00
3/8/2017
3/9/2017
3/10/2017 0.39
3/11/2017
3/12/2017
3/13/2017
3/14/2017
3/15/2017
3/16/2017
3/17/2017
3/18/2017
3/19/2017
3/20/2017
3/21/2017
3/22/2017
3/23/2017
3/24/2017
3/25/2017
3/26/2017
3/27/2017
3/28/2017
3/29/2017
3/30/2017
3/31/2017
Day of YearDaily PrcpMultiday Prcp
4/1/2017
4/2/2017
4/3/2017
4/4/2017
4/5/2017
4/6/2017
4/7/2017
4/8/2017
4/9/2017
4/10/2017
4/11/2017
4/12/2017
4/13/2017
4/14/2017
4/15/2017
4/16/2017
4/17/2017
4/18/2017
4/19/2017
4/20/2017
4/21/2017
4/22/2017
4/23/2017
4/24/2017
4/25/2017
4/26/2017
4/27/2017
4/28/2017
4/29/2017
4/30/2017
5/1/2017
5/2/2017
5/3/2017
5/4/2017
5/5/2017 0.21
5/6/2017 0.00
5/7/2017 0.00
5/8/2017
5/9/2017
5/10/2017
5/11/2017 0.00
5/12/2017 0.44
5/13/2017 **
5/14/2017 **
5/15/2017 0.06
5/16/2017 0.00
5/17/2017 0.58
5/18/2017
5/19/2017
5/20/2017
5/21/2017
5/22/2017
5/23/2017
5/24/2017
5/25/2017
5/26/2017
5/27/2017
5/28/2017
5/29/2017
5/30/2017
5/31/2017 0.28
6/1/2017
6/2/2017
6/3/2017
6/4/2017
6/5/2017
6/6/2017
6/7/2017
6/8/2017
6/9/2017 0.16
6/10/2017 0.04
6/11/2017 0.09
6/12/2017
6/13/2017
6/14/2017
6/15/2017
6/16/2017
6/17/2017
6/18/2017
6/19/2017
6/20/2017
6/21/2017
6/22/2017
6/23/2017
6/24/2017
6/25/2017
6/26/2017
6/27/2017
6/28/2017
6/29/2017
6/30/2017
Day of YearDaily PrcpMultiday Prcp
7/1/2017
7/2/2017
7/3/2017
7/4/2017
7/5/2017
7/6/2017
7/7/2017
7/8/2017
7/9/2017
7/10/2017
7/11/2017
7/12/2017
7/13/2017
7/14/2017
7/15/2017
7/16/2017
7/17/2017
7/18/2017
7/19/2017
7/20/2017
7/21/2017
7/22/2017
7/23/2017
7/24/2017
7/25/2017
7/26/2017
7/27/2017
7/28/2017
7/29/2017
7/30/2017
7/31/2017
8/1/2017 0.00
8/2/2017 0.00
8/3/2017 0.00
8/4/2017 0.00
8/5/2017 0.00
8/6/2017 0.00
8/7/2017 0.00
8/8/2017 0.00
8/9/2017 0.00
8/10/2017 0.00
8/11/2017 0.00
8/12/2017 0.00
8/13/2017 0.00
8/14/2017 0.00
8/15/2017 0.00
8/16/2017 0.00
8/17/2017 0.00
8/18/2017 0.00
8/19/2017 0.00
8/20/2017 0.00
8/21/2017 0.00
8/22/2017 0.00
8/23/2017 0.00
8/24/2017 0.00
8/25/2017 0.00
8/26/2017 0.00
8/27/2017 0.00
8/28/2017 0.00
8/29/2017 0.00
8/30/2017 0.00
8/31/2017 0.00
9/1/2017
9/2/2017
9/3/2017
9/4/2017
9/5/2017
9/6/2017
9/7/2017
9/8/2017
9/9/2017
9/10/2017
9/11/2017
9/12/2017
9/13/2017
9/14/2017
9/15/2017
9/16/2017
9/17/2017
9/18/2017 T
9/19/2017 T
9/20/2017 0.03
9/21/2017 T
9/22/2017 0.00
9/23/2017 0.00
9/24/2017 0.00
9/25/2017 0.00
9/26/2017
9/27/2017
9/28/2017
9/29/2017
9/30/2017 T



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/7/2016 7:00 AM 0.12 M M M M
10/11/2016 7:00 AM 0.00 0.0 M M M
10/12/2016 7:00 AM 0.00 0.0 M M M
10/13/2016 7:00 AM 0.00 0.0 M M M
10/14/2016 7:00 AM 0.56 M M M M Lots of rain! But fortunately, not much wind.
10/26/2016 7:00 AM 0.00 0.0 M M M
11/15/2016 7:30 AM 0.43 0.7 M 0.5 M First snow of the season! Rain changed to wet snow overnight.
11/24/2016 8:00 AM 0.01 0.0 M 0.0 M
11/25/2016 8:00 AM 0.14 0.0 M 0.0 M
11/26/2016 10:15 AM 0.35 0.0 M 0.0 M Lots of rain overnight; still none of the promised snow. Oddly enough, our Davis wx station, which is about 75 ft up the hill from this rain gauge, logged 0.75" rain in the last 24 hours. They usually match quite well; not sure why the discrepancy this time, unless the house was shielding the CoCoRaHS rain gauge a bit given the SE winds.
12/2/2016 7:00 AM 0.00 0.0 M M M
12/3/2016 9:00 AM 0.01 0.1 M 0.1 M
12/4/2016 9:00 AM 0.02 0.3 M 0.3 M Another dusting of snow last night.
12/5/2016 8:00 AM 0.00 0.0 M T M
12/6/2016 8:00 AM 0.10 2.0 M 2.0 M Snow! Yay!
12/7/2016 8:00 AM 0.00 0.0 M 1.5 M
12/8/2016 8:00 AM 0.00 0.0 M 1.0 M
12/9/2016 8:00 AM 0.08 1.7 M 3.0 M Cold, dry, fluffy snow. Started some time after 10 PM last night. Temps in the teens overnight. Still snowing lightly, but clearing skies.
12/10/2016 4:40 PM 0.09 1.0 M 3.0 M today's accumulation is mostly from the system that came through the afternoon and night of 12/9. Clear by 4 AM on 12/10, which lasted until afternoon. New system started snowing mid-afternoon 12/10.
12/11/2016 3:40 PM 0.01 0.3 M 3.0 M
12/12/2016 8:30 AM T 0.1 M 3.0 M
12/13/2016 8:30 AM 0.00 0.0 M 2.5 M
12/14/2016 7:00 AM 0.00 0.0 M 3.0 M
12/15/2016 8:00 AM 0.01 0.3 M 3.0 M
12/16/2016 7:00 AM 0.00 0.0 M 3.0 M
12/17/2016 7:00 AM 0.00 0.0 M 3.0 M
12/18/2016 7:00 AM 0.00 0.0 M 3.0 M
12/19/2016 8:00 AM 0.10 2.2 M 5.0 M all snow
12/20/2016 8:30 AM 0.22 3.5 M 8.0 M all snow! pretty steady 17 deg F overnight, during snowfall. Then lull and snow squall around 8 AM
12/21/2016 8:00 AM 0.00 0.0 M 6.5 M
12/22/2016 9:00 AM 0.00 0.0 M 6.0 M
12/23/2016 3:00 PM 0.28 2.8 M 9.0 M yay snow! good for the ski trails-- we need it!
12/24/2016 3:00 PM 0.00 0.0 M 8.5 M
12/25/2016 12:00 PM 0.00 0.0 M 8.5 M
12/27/2016 8:00 AM 0.11 1.3 M 8.5 M more snow! Little by little....
12/28/2016 8:00 AM 0.04 0.6 M 9.0 M Another snow squall yesterday morning after yesterday's report. Mostly clear skies since.
12/29/2016 9:30 AM T T M 9.0 M
12/30/2016 1:30 PM 0.12 M M 10.0 M Not sure how much new snow we had, because it was melted by the time I got home from work, but it was between 1-2".
12/31/2016 12:00 PM 0.00 0.0 M 9.5 M
1/1/2017 1:30 PM 0.10 2.1 M 11.0 M
1/2/2017 11:00 AM 0.00 0.0 M 10.5 M
1/3/2017 9:00 AM 0.00 0.0 M 10.0 M got down to minus 2 F last night. Snow is sublimating!
1/4/2017 8:00 AM 0.00 0.0 M 10.0 M We hit a low of MINUS 14.4 deg F this morning! Haven't seen temps that low here in a couple decades. That's more like the spring temps we experienced in Antarctica!
1/5/2017 12:00 PM 0.00 0.0 M 10.0 M The bitter cold continues: low of minus 12 F this morning.
1/6/2017 2:00 PM 0.00 0.0 M 9.5 M
1/7/2017 4:00 PM 0.00 0.0 M 9.5 M Another chilly morning: minus 10.5 deg F was our low at ~8:26 AM!
1/14/2017 12:00 PM 0.00 0.0 M 12.0 M
1/15/2017 1:00 PM 0.00 0.0 M 11.5 M
1/16/2017 7:00 AM 0.00 0.0 M 11.5 M
1/18/2017 8:00 AM 0.23 2.2 M 14.0 M
1/19/2017 9:00 AM 0.49 5.1 M 18.5 M (Note: Melted snow in gauge is a slight underestimate, as I spilled a little upon transfer to measuring device. Probably only off by a couple hundredths, though.) Finally, a real snow storm! And, for maybe the first time all winter, the temps are warm enough that this snow has some moisture and binding to it. (Until now, we've been grooming very dry snow for the ski trails, which has been hard to consolidate into a platform. This moisture will help!)
1/20/2017 9:15 AM 0.08 1.1 M 18.5 M Not much snow overnight, but started snowing more heavily around 5:30 AM. At the time of this report, it's starting to be a mix of snow, freezing drizzle, and graupel. Temperature is 29.4 deg F.
1/21/2017 11:15 AM 0.23 2.1 M 20.5 M So far, essentially all snow. (Minute traces of freezing drizzle and graupel.
1/22/2017 12:00 PM 0.26 1.2 M 19.0 M Mix of several forms of precip-- freezing rain, graupel, possibly rain, but mostly snow. In spite of the fact that we got more than an inch of new snow, the overall depth on ground decreased compared to yesterday, no doubt due to wet conditions and compaction/settling.
1/23/2017 8:00 AM 0.39 2.6 M 20.0 M Wet, heavy snow! Amount reported in rain gauge is slight underestimate, as I spilled some while measuring.
1/24/2017 9:00 AM 0.00 0.0 M 19.0 M
1/25/2017 9:00 AM 0.00 0.0 M 17.5 M
1/31/2017 9:00 AM 0.14 2.5 M 18.0 M Wow! What a surprise! 2.5" of unexpected snow overnight. Light and fluffy.
2/15/2017 5:00 PM 0.19 0.2 M 21.0 M We've had precip in the form of rain, freezing rain, and snow since 3 AM this morning. Still alternating between rain and snow at 5 PM. Measurable new accumulation was sort of slushy snow.
2/20/2017 10:00 AM 0.05 0.3 M 17.5 M Started snowing around 7 AM this morning; this is the new accumulated snow amount reported below. Had trace amounts of precip yesterday, but no accumulation.
2/28/2017 10:00 AM T 0.1 M 17.0 M The new snow amount is not totally accurate, as it had already started to melt at time of measurement.
3/3/2017 10:00 AM 0.00 0.0 M 14.0 M
3/4/2017 12:00 PM 0.00 0.0 M 14.0 M
3/5/2017 9:30 AM 0.25 4.6 M 18.0 M Gorgeous day yesterday; snow started overnight (~3:45 AM on valley floor). Snowed heavily for several hours; now tapering off with small patches of blue sky peaking through clouds. In the mid-upper 20's overnight.
3/6/2017 9:00 AM T T M 16.0 M
3/7/2017 8:30 AM 0.00 0.0 M 14.5 M
3/10/2017 9:00 AM 0.39 3.7 M 18.5 M Wet snow storm started yesterday afternoon;ended overnight. The new snow accumulation was probably closer to 4" earlier in the morning, before things started to warm up and settle. (only got down to a low of 29 deg F around 7 AM this morning.)
5/5/2017 7:00 AM 0.21 M M M M
5/6/2017 7:00 AM 0.00 0.0 M M M
5/7/2017 7:00 AM 0.00 0.0 M M M
5/11/2017 5:30 AM 0.00 0.0 M M M
5/12/2017 7:00 AM 0.44 M M M M Good rains, starting at 5:40 AM yesterday morning.
5/16/2017 5:30 AM 0.00 0.0 M M M
5/17/2017 7:00 AM 0.58 M M M M Rain started 5:40 AM yesterday. During the day, had periods of showers, hard rain, snow in the foothills (though not at this location), and pea-sized hail. Wild day!
5/31/2017 9:00 AM 0.28 M M M M Wow, quite the thunder storm came through last night, about 7:30 PM! Wind and torrential rains for about 45 minutes; then showers off and on the rest of the night.
6/9/2017 8:00 AM 0.16 M M M M
6/10/2017 8:00 AM 0.04 M M M M
6/11/2017 9:00 AM 0.09 M M M M
8/1/2017 7:00 AM 0.00 0.0 M M M
8/2/2017 7:00 AM 0.00 0.0 M M M
8/3/2017 7:00 AM 0.00 0.0 M M M
8/4/2017 7:00 AM 0.00 0.0 M M M
8/5/2017 7:00 AM 0.00 0.0 M M M
8/6/2017 7:00 AM 0.00 0.0 M M M
8/7/2017 7:00 AM 0.00 0.0 M M M
8/8/2017 7:00 AM 0.00 0.0 M M M
8/9/2017 7:00 AM 0.00 0.0 M M M
8/10/2017 7:00 AM 0.00 0.0 M M M
8/11/2017 7:00 AM 0.00 0.0 M M M
8/12/2017 7:00 AM 0.00 0.0 M M M
8/13/2017 7:00 AM 0.00 0.0 M M M
8/14/2017 7:00 AM 0.00 0.0 M M M
8/15/2017 7:00 AM 0.00 0.0 M M M
8/16/2017 7:00 AM 0.00 0.0 M M M
8/17/2017 7:00 AM 0.00 0.0 M M M
8/18/2017 7:00 AM 0.00 0.0 M M M
8/19/2017 7:00 AM 0.00 0.0 M M M
8/20/2017 7:00 AM 0.00 0.0 M M M
8/21/2017 7:00 AM 0.00 0.0 M M M
8/22/2017 7:00 AM 0.00 0.0 M M M
8/23/2017 7:00 AM 0.00 0.0 M M M
8/24/2017 7:00 AM 0.00 0.0 M M M
8/25/2017 7:00 AM 0.00 0.0 M M M
8/26/2017 7:00 AM 0.00 0.0 M M M
8/27/2017 7:00 AM 0.00 0.0 M M M
8/28/2017 7:00 AM 0.00 0.0 M M M
8/29/2017 7:00 AM 0.00 0.0 M M M
8/30/2017 7:00 AM 0.00 0.0 M M M
8/31/2017 7:00 AM 0.00 0.0 M M M
9/18/2017 7:00 AM T M M M M
9/19/2017 7:00 AM T M M M M
9/20/2017 7:00 AM 0.03 M M M M The first measurable rain we've had in about 3 months! Finally knocking back some of the smoke from Uno Peak and Diamond Creek fires.
9/21/2017 7:00 AM T M M M M
9/22/2017 7:00 AM 0.00 0.0 M M M
9/23/2017 7:00 AM 0.00 0.0 M M M
9/24/2017 7:00 AM 0.00 0.0 M M M
9/25/2017 7:00 AM 0.00 0.0 M M M
9/30/2017 7:00 AM T M M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
10/8/2016 10/10/2016 6:45 AM 3 0.22 M M
10/17/2016 10/22/2016 9:00 AM 6 1.02 M M
10/23/2016 10/25/2016 7:00 AM 3 0.03 M M
10/27/2016 10/28/2016 7:00 AM 2 0.40 M M
10/29/2016 10/30/2016 7:00 AM 2 0.01 M M
11/7/2016 11/14/2016 6:30 PM 8 0.01 M M
11/19/2016 11/23/2016 7:00 AM 5 0.46 0.0 M
11/27/2016 11/28/2016 7:30 AM 2 0.07 0.2 M The total precip included some rain from 1/26-11/27. Most of 11/27 was clear, but it started raining ~ 8PM and then switched to snow about an hour later. Then cleared again. The layer of crunchy snow from last night (looks like a mix of frozen rain-wet snow that then froze hard later in the night) was enough to blanket the ground at our registered location to about 1/4 inch of depth, but it looks like the snow only barely made it to the valley floor several hundered feet below.
1/8/2017 1/09/2017 8:00 AM 2 0.32 13.5 M Got a little bit of snow (about half inch) the evening of 1/7; then a break; then most of the snow fell during the afternoon and evening of 1/8 (started snowing about 11:30 AM on 1/8). Total new snow measured this morning from these 2 systems was 3.5".
1/10/2017 1/13/2017 8:00 AM 4 0.00 12.0 M
1/26/2017 1/28/2017 9:00 AM 3 0.00 16.5 M No new precip in the last 3 days. Steadily losing snow to melting and sublimation.
1/29/2017 1/30/2017 10:30 AM 2 0.00 16.0 M
2/1/2017 2/12/2017 2:00 PM 12 1.01 23.0 M Had a lot more snow while I was away. Total depth was 26" a few days ago; settled by the time it was measured again on the 12th. There was still 7.5" of "new" snow on the snow board as of the 12th (in spite of settling, melting, and evaporation since storms that came through around Feb. 8).
2/13/2017 2/14/2017 3:00 PM 2 0.00 21.0 M
2/16/2017 2/17/2017 11:30 AM 2 0.23 19.5 M
2/18/2017 2/19/2017 12:00 PM 2 0.05 17.5 M
2/21/2017 2/27/2017 11:00 AM 7 0.18 17.5 M We had about 1.5" new snow from 2 storms in the last 2 days.
3/1/2017 3/02/2017 9:00 AM 2 0.00 14.0 M Warmer temps and breezes over the last couple days have diminished the snowpack on ground. But there's been some great crust-riding for fat-biking!
5/13/2017 5/15/2017 7:00 AM 3 0.06 M M



Observation Date Observation Time Notes Largest Stone Size Average Stone Size Smallest Stone Size Stone Consistency Duration Minutes Durration Accuracy Damage Timing More Rain than Hail Hail Started Largest Hail Started Angle of Impact Number of Stones on Pad Distance Between Stones on Pad Depth of Stones on Ground