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 10 1.04 0.75 31 0.75 31 0.00 0 0 8 1 0.0 0 0
Nov 10 2.23 1.28 30 1.26 20 0.02 10 1 8 4 3.5 2 1
Dec 10 2.57 3.05 31 2.63 21 0.42 10 2 12 4 27.0 9 21
Jan 11 2.26 1.40 31 1.07 24 0.33 7 2 5 9 8.6 5 24
Feb 11 1.49 0.71 28 0.67 25 0.04 3 1 9 3 10.0 8 25
March 11 1.11 3.74 31 2.99 21 0.75 10 4 12 2 12.9 8 20
April 11 0.79 0.27 29 0.27 27 0.00 2 1 4 6 0.0 0 0
May 11 1.06 3.82 31 3.04 28 0.78 3 1 14 1 0.0 0 0
June 11 1.26 1.22 30 0.89 15 0.33 15 2 7 1 0.0 0 0
July 11 0.74 0.43 31 0.25 26 0.18 5 2 3 2 0.0 0 0
Aug 11 0.54 0.00 31 0.00 29 0.00 2 1 0 1 0.0 0 0
Sept 11 0.46 0.13 30 0.13 27 0.00 3 1 2 1 0.0 0 0
Water Year Totals: 15.55" 16.80" 364 days 13.95" 294 2.85" 70 days 18 84 days 35 days 62.0" 32 days 91 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
10/1/2010 0.00
10/2/2010 0.00
10/3/2010 0.00
10/4/2010 0.00
10/5/2010 0.00
10/6/2010 0.00
10/7/2010 0.00
10/8/2010 0.00
10/9/2010 0.02
10/10/2010 0.29
10/11/2010 0.05
10/12/2010 0.00
10/13/2010 0.00
10/14/2010 0.00
10/15/2010 0.00
10/16/2010 0.00
10/17/2010 0.00
10/18/2010 0.00
10/19/2010 0.00
10/20/2010 0.00
10/21/2010 0.00
10/22/2010 0.00
10/23/2010 0.00
10/24/2010 0.25
10/25/2010 T
10/26/2010 0.00
10/27/2010 0.00
10/28/2010 0.02
10/29/2010 0.10
10/30/2010 0.01
10/31/2010 0.01
11/1/2010 0.00
11/2/2010 0.34
11/3/2010 T
11/4/2010 0.00
11/5/2010 0.00
11/6/2010 **
11/7/2010 **
11/8/2010 0.02
11/9/2010 0.00
11/10/2010 0.13
11/11/2010 0.00
11/12/2010 0.03
11/13/2010 0.00
11/14/2010 0.03
11/15/2010 0.00
11/16/2010 0.33
11/17/2010 0.00
11/18/2010 T
11/19/2010 T
11/20/2010 0.29
11/21/2010 0.05
11/22/2010 T
11/23/2010 0.06
11/24/2010 **
11/25/2010 **
11/26/2010 **
11/27/2010 **
11/28/2010 **
11/29/2010 **
11/30/2010 **
12/1/2010 **
12/2/2010 **
12/3/2010 **
12/4/2010 **
12/5/2010 **
12/6/2010 **
12/7/2010 0.37
12/8/2010 0.44
12/9/2010 T
12/10/2010 0.03
12/11/2010 0.00
12/12/2010 0.90
12/13/2010 0.03
12/14/2010 **
12/15/2010 **
12/16/2010 0.05
12/17/2010 0.12
12/18/2010 0.00
12/19/2010 0.13
12/20/2010 T
12/21/2010 0.28
12/22/2010 0.04
12/23/2010 0.32
12/24/2010 T
12/25/2010 0.24
12/26/2010 0.03
12/27/2010 T
12/28/2010 0.07
12/29/2010 0.00
12/30/2010 0.00
12/31/2010 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2011 0.00
1/2/2011 0.00
1/3/2011 0.00
1/4/2011 0.00
1/5/2011 T
1/6/2011 T
1/7/2011 T
1/8/2011 0.00
1/9/2011 T
1/10/2011 0.00
1/11/2011 T
1/12/2011 0.47
1/13/2011 0.12
1/14/2011 0.07
1/15/2011 0.00
1/16/2011 0.37
1/17/2011 **
1/18/2011 **
1/19/2011 0.31
1/20/2011 0.00
1/21/2011 T
1/22/2011 T
1/23/2011 0.00
1/24/2011 **
1/25/2011 **
1/26/2011 **
1/27/2011 0.02
1/28/2011 T
1/29/2011 T
1/30/2011 0.04
1/31/2011 0.00
2/1/2011 0.00
2/2/2011 0.00
2/3/2011 0.00
2/4/2011 T
2/5/2011 0.00
2/6/2011 0.10
2/7/2011 0.15
2/8/2011 T
2/9/2011 0.00
2/10/2011 0.00
2/11/2011 0.00
2/12/2011 0.00
2/13/2011 T
2/14/2011 **
2/15/2011 **
2/16/2011 0.04
2/17/2011 0.00
2/18/2011 0.01
2/19/2011 0.01
2/20/2011 0.00
2/21/2011 0.00
2/22/2011 0.02
2/23/2011 0.04
2/24/2011 0.12
2/25/2011 0.00
2/26/2011 0.00
2/27/2011 0.01
2/28/2011 0.21
3/1/2011 **
3/2/2011 0.35
3/3/2011 **
3/4/2011 T
3/5/2011 0.20
3/6/2011 0.00
3/7/2011 0.00
3/8/2011 0.01
3/9/2011 0.10
3/10/2011 0.33
3/11/2011 T
3/12/2011 0.00
3/13/2011 0.00
3/14/2011 0.76
3/15/2011 **
3/16/2011 0.09
3/17/2011 0.00
3/18/2011 0.03
3/19/2011 0.44
3/20/2011 0.00
3/21/2011 0.37
3/22/2011 0.01
3/23/2011 0.09
3/24/2011 T
3/25/2011 0.49
3/26/2011 **
3/27/2011 **
3/28/2011 **
3/29/2011 0.31
3/30/2011 0.00
3/31/2011 0.16
Day of YearDaily PrcpMultiday Prcp
4/1/2011 0.00
4/2/2011 0.20
4/3/2011 0.00
4/4/2011 0.00
4/5/2011 T
4/6/2011
4/7/2011 T
4/8/2011 0.02
4/9/2011 0.00
4/10/2011 0.00
4/11/2011 0.00
4/12/2011 0.00
4/13/2011 0.00
4/14/2011 0.02
4/15/2011 0.03
4/16/2011 0.00
4/17/2011 0.00
4/18/2011 0.00
4/19/2011 0.00
4/20/2011 T
4/21/2011 T
4/22/2011 0.00
4/23/2011 **
4/24/2011 0.00
4/25/2011 T
4/26/2011 T
4/27/2011 0.00
4/28/2011 0.00
4/29/2011 0.00
4/30/2011 0.00
5/1/2011 0.00
5/2/2011 0.00
5/3/2011 0.04
5/4/2011 0.00
5/5/2011 0.00
5/6/2011 0.00
5/7/2011 0.07
5/8/2011 0.38
5/9/2011 T
5/10/2011 0.00
5/11/2011 0.00
5/12/2011 0.09
5/13/2011 0.00
5/14/2011 0.46
5/15/2011 0.77
5/16/2011 0.26
5/17/2011 0.01
5/18/2011 0.00
5/19/2011 0.00
5/20/2011 0.00
5/21/2011 0.00
5/22/2011 0.39
5/23/2011 0.16
5/24/2011 **
5/25/2011 **
5/26/2011 0.78
5/27/2011 0.00
5/28/2011 0.08
5/29/2011 0.03
5/30/2011 0.05
5/31/2011 0.25
6/1/2011 0.28
6/2/2011 0.17
6/3/2011 **
6/4/2011 **
6/5/2011 **
6/6/2011 0.00
6/7/2011 0.00
6/8/2011 0.23
6/9/2011 0.13
6/10/2011 0.06
6/11/2011 0.00
6/12/2011 0.00
6/13/2011 T
6/14/2011 0.00
6/15/2011 0.00
6/16/2011 **
6/17/2011 **
6/18/2011 **
6/19/2011 **
6/20/2011 **
6/21/2011 **
6/22/2011 **
6/23/2011 **
6/24/2011 **
6/25/2011 **
6/26/2011 0.33
6/27/2011 0.00
6/28/2011 0.01
6/29/2011 0.01
6/30/2011 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2011 0.00
7/2/2011 0.00
7/3/2011 0.00
7/4/2011 0.00
7/5/2011 0.00
7/6/2011 0.00
7/7/2011 0.00
7/8/2011 0.05
7/9/2011 0.00
7/10/2011 0.00
7/11/2011 0.00
7/12/2011 0.00
7/13/2011 0.07
7/14/2011 0.00
7/15/2011 0.00
7/16/2011 T
7/17/2011 **
7/18/2011 0.13
7/19/2011 **
7/20/2011 **
7/21/2011 0.05
7/22/2011 0.00
7/23/2011 0.00
7/24/2011 0.00
7/25/2011 T
7/26/2011 0.13
7/27/2011 0.00
7/28/2011 0.00
7/29/2011 0.00
7/30/2011 0.00
7/31/2011 0.00
8/1/2011 0.00
8/2/2011 **
8/3/2011 0.00
8/4/2011 0.00
8/5/2011 0.00
8/6/2011 0.00
8/7/2011 0.00
8/8/2011 0.00
8/9/2011 0.00
8/10/2011 0.00
8/11/2011 T
8/12/2011 0.00
8/13/2011 0.00
8/14/2011 0.00
8/15/2011 0.00
8/16/2011 0.00
8/17/2011 0.00
8/18/2011 0.00
8/19/2011 0.00
8/20/2011 0.00
8/21/2011 0.00
8/22/2011 0.00
8/23/2011 0.00
8/24/2011 0.00
8/25/2011 0.00
8/26/2011 0.00
8/27/2011 0.00
8/28/2011 0.00
8/29/2011 0.00
8/30/2011 0.00
8/31/2011 0.00
9/1/2011 0.00
9/2/2011 0.00
9/3/2011 0.00
9/4/2011 0.00
9/5/2011 0.00
9/6/2011 0.00
9/7/2011 0.00
9/8/2011 0.00
9/9/2011 0.00
9/10/2011 **
9/11/2011 **
9/12/2011 0.00
9/13/2011 0.00
9/14/2011 0.00
9/15/2011 0.00
9/16/2011 0.00
9/17/2011 0.00
9/18/2011 0.00
9/19/2011 0.02
9/20/2011 0.00
9/21/2011 0.00
9/22/2011 0.00
9/23/2011 0.00
9/24/2011 0.00
9/25/2011 T
9/26/2011 0.00
9/27/2011 0.11
9/28/2011 0.00
9/29/2011 0.00
9/30/2011 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2010 7:00 AM 0.00 0.0 M M M
10/2/2010 7:00 AM 0.00 0.0 M M M
10/3/2010 7:00 AM 0.00 0.0 M M M
10/4/2010 7:00 AM 0.00 0.0 M M M
10/5/2010 7:00 AM 0.00 0.0 M M M
10/6/2010 7:00 AM 0.00 0.0 M M M
10/7/2010 7:00 AM 0.00 0.0 M M M
10/8/2010 7:00 AM 0.00 0.0 M M M
10/9/2010 7:00 AM 0.02 M M M M Davis wx stn also registered 0.02"; all accumulated after midnight.
10/10/2010 7:00 AM 0.29 M M M M Davis wx stn registered 0.28"
10/11/2010 7:00 AM 0.05 M M M M
10/12/2010 7:00 AM 0.00 0.0 M M M
10/13/2010 7:00 AM 0.00 0.0 M M M
10/14/2010 7:00 AM 0.00 0.0 M M M
10/15/2010 7:00 AM 0.00 0.0 M M M
10/16/2010 7:00 AM 0.00 0.0 M M M
10/17/2010 7:00 AM 0.00 0.0 M M M
10/18/2010 7:00 AM 0.00 0.0 M M M
10/19/2010 7:00 AM 0.00 0.0 M M M
10/20/2010 7:00 AM 0.00 0.0 M M M
10/21/2010 7:00 AM 0.00 0.0 M M M
10/22/2010 7:00 AM 0.00 0.0 M M M
10/23/2010 7:00 AM 0.00 0.0 M M M
10/24/2010 7:00 AM 0.25 M M M M
10/25/2010 7:00 AM T M M M M
10/26/2010 7:00 AM 0.00 0.0 M M M
10/27/2010 7:00 AM 0.00 0.0 M M M
10/28/2010 7:00 AM 0.02 M M M M
10/29/2010 7:00 AM 0.10 M M M M
10/30/2010 7:00 AM 0.01 M M M M
10/31/2010 7:00 AM 0.01 M M M M
11/1/2010 7:00 AM 0.00 0.0 M M M
11/2/2010 7:00 AM 0.34 M M M M Davis wx stn reported 0.36"
11/3/2010 7:00 AM T M M M M
11/4/2010 7:00 AM 0.00 0.0 M M M
11/5/2010 7:00 AM 0.00 0.0 M M M
11/9/2010 7:00 AM 0.00 0.0 M M M
11/10/2010 7:00 AM 0.13 1.0 M M M This was all melted snow...our first of the season! (approx. 1" accumulation)
11/11/2010 7:00 AM 0.00 0.0 M M M
11/12/2010 7:00 AM 0.03 M M M M represents melted snow
11/13/2010 7:00 AM 0.00 0.0 M M M
11/14/2010 7:00 AM 0.03 M M M M Rain overnight
11/15/2010 7:00 AM 0.00 0.0 M M M
11/16/2010 7:00 AM 0.33 M M M M Davis wx stn registered 0.31" rain
11/17/2010 7:00 AM 0.00 0.0 M M M
11/18/2010 7:00 AM T M M M M
11/19/2010 7:00 AM T M M M M
11/20/2010 7:00 AM 0.29 2.5 M 2.5 M Water content of all new snow snow snow! Started sometime between 4 and 6:30 last night; still snowing now. Already 2-3" on ground. ~24 deg F at 7 AM.
11/21/2010 7:00 AM 0.05 M M M M melted snow
11/22/2010 7:00 AM T M M M M
11/23/2010 7:00 AM 0.06 M M M M more snow & bitter cold: low of 3 deg F last night; gusts to 35 mph wind.
12/8/2010 7:00 AM 0.44 M M 8.5 M
12/9/2010 7:00 AM T M M 8.5 M
12/10/2010 7:00 AM 0.03 M M 9.0 M
12/11/2010 7:00 AM 0.00 0.0 M 9.0 M Freezing fog overnight and this morning. Nice rime crystals!
12/12/2010 8:00 AM 0.90 13.0 M 22.0 M The gauge was over-filled with snow! Total measured amount in full cylinder was 0.67" water equivalent, but the snow height extended another ~4" above the cylinder (at full diameter) (= a third again as much), so estimated ~0.9". This might be an under-estimate, as some snow above cylinder top may have tumbled off during storm. Temps hovered around 26 deg F overnight, and in 20's yesterday. Rec'd 10" new snow b/w 12PM and 11 PM yesterday (average of several measurements on cleared ground); remaining 3" was b/w 11PM and 8 AM today. No rain yet, thankfully-- all snow. Warming (29.6 deg F), partly sunny, and clearing at time of this writing (~ 10 AM). (measurements taken at 8 AM)
12/13/2010 7:00 AM 0.03 M M 16.0 M This was from a brief period of "wintry mix" of snow-freezing rain yesterday.
12/17/2010 7:00 AM 0.12 1.5 M 17.5 M About 1-2" new snow (estimate)
12/18/2010 7:00 AM 0.00 0.0 M 16.5 M
12/19/2010 7:00 AM 0.13 1.3 M 17.0 M First snow storm of the last 24 hrs. started at 10:15 AM (very accurate); stopped b/w 12:30-13:00. Total accumulation on snow board from this storm was 0.5" (measured at 15:30). Then partial clearing for rest of daylight hours (blue sky ~5%). Next storm started sometime overnight; ended b/w 7:00-7:30 this morning.
12/20/2010 7:00 AM T T M 17.0 M just a dusting of snow-- not enough to measure depth.
12/21/2010 7:30 AM 0.28 3.4 M 19.0 M
12/22/2010 7:45 AM 0.04 0.4 M 18.5 M started snowing sometime b/w 2-7:30 AM
12/23/2010 8:00 AM 0.32 3.9 M 21.0 M
12/24/2010 8:00 AM T T M 20.0 M
12/25/2010 8:00 AM 0.24 2.4 M 21.0 M Snow started at 3 PM; don't know what time it ended (sometime b/w 11:30 PM and 7:30 AM ). Temperature hovering right about freezing yesterday and this morning.
12/26/2010 8:00 AM 0.03 0.2 M 20.5 M
12/27/2010 8:00 AM T T M 18.5 M Very warm yesterday-- high of 39.8 at 12:30 PM; finally chilled down last night, to low of 21 by 7 AM.
12/28/2010 8:00 AM 0.07 0.9 M 19.5 M
12/29/2010 8:00 AM 0.00 0.0 M 19.0 M Gorgeous, sunny, calm day yesterday. Temp rose during the night from 21.5 to a high of 30.9 at 8:28 this morning; overcast. Wind kicked up at 8 AM (10-min. avg = 12 mph); temp now dropping (29.6 now at 9 AM). Cold front is coming in!
12/30/2010 7:00 AM 0.00 0.0 M 18.0 M
12/31/2010 8:00 AM 0.00 0.0 M 17.5 M Temp reached a low of -9.1 at 9:45 this morning! Calm, sunny.
1/1/2011 8:00 AM 0.00 0.0 M 17.0 M High yesterday: 28 deg F; low -10 this morning. Sunny, calm.
1/2/2011 7:00 AM 0.00 0.0 M 17.0 M
1/3/2011 7:00 AM 0.00 0.0 M 17.0 M
1/4/2011 7:00 AM 0.00 0.0 M 17.0 M
1/5/2011 8:00 AM T 0.1 M 17.0 M
1/6/2011 7:00 AM T T M 17.0 M
1/7/2011 7:00 AM T T M 17.0 M
1/8/2011 8:00 AM 0.00 0.0 M 17.0 M
1/9/2011 1:30 PM T T M 17.0 M Snowfall was only during a brief period last night, so the readings done today may be underestimates due to evaporation. Temp. has been b/w 9.5 and 25 deg F since snowfall last night.
1/10/2011 8:00 AM 0.00 0.0 M 17.0 M
1/11/2011 8:00 AM T 0.2 M 17.0 4.26 The reported amounts are for the 24-hr period, but I took the first measurement after yesterday's snow event. Snow ended about 1:00 PM on 1/10; measurements taken at 4:30 PM. There was only trace additional accumulation b/w 4:30 PM yesterday and 8 AM this morning. Total snow on ground measurement was taken this morning;it was re-measured this afternoon at 3:45 PM when core samples were taken to get SWE from total snow on ground.
1/12/2011 8:00 AM 0.47 6.7 0.48 23.0 M Snow started at 4:45 PM yesterday; still snowing at report time this morning. In fact, I first emptied the rain gauge into a separate container, then went to measure my snow board and take a core. Measured snow on board and realized I'd forgotten spatula; when I returned 5-10 min. later, I re-measured before taking core, and there was already another 0.1" on board!
1/13/2011 7:00 AM 0.12 0.9 M 24.0 M The snow storm that started at 4:45 PM on 1/11 continued until 11:30 AM on 1/12. During the 3.5 hours b/w my 8 AM measurements on 1/12 (for the previous 24 hrs) and end of the storm at 11:30 AM, we got 0.9"new snow on the snow board (with melted value = 0.07") and Total Snow on Ground of 24"(measurements taken at 1 PM on 1/12). Melted snow in rain gauge taken at this time was 0.04"; I'm reporting the melted snow board core sample of 0.07" instead of melted snow that fell in rain gauge b/c I think the snow board core is more accurate. Overnight and this morning, we got more snow: melted snow in rain gauge at 7 AM was 0.05". Thus, total melted snow in gauge for 23 hr period was 0.12". Unfortunately, I didn't have time to measure new snow accumulation this morning (accumulating since 11:30 AM yesterday); all I know for the 24-hr period is > 0.9".
1/14/2011 8:00 AM 0.07 M M 23.0 M Precipitation in gauge was partly from snow and later from freezing rain. Accumulated snow on board was 1.5", but this was total for 48 hrs. This evening (1/14), the temperatures have started to climb dramatically and quickly: 6:50 PM: temp 27 deg F. (from Davis wx stn in yard.); Wind just starting to pick up. 8:00 PM: 37 deg; windier (don't have accurate speed from anemometer; may be iced?) 9:10 PM: 40 deg; still windy. 10:30 PM: 43 deg; wind speed 10 mph (which may still not be accurate, but is closer to reality than earlier readings. Ice on anemometer may have now melted off, making it more reliable!) Skies during these last hours have been partly cloudy.
1/15/2011 9:00 AM 0.00 0.0 M 19.0 M Cloud cover during the day ranged from total overcast to mostly sunny. Temperatures started to rise dramatically during the evening and night (data from Davis Vantage Pro 2 wx stn): 6:50 PM: wind started to pick up; temp 27 deg F. 8:00 PM: windier (anemometer not working); 37 deg F. 9:10 PM: still windy; 40 deg F. 10:30 PM: anemometer registers 10 mph (which seems reasonable; maybe it was iced before and is now melted off!); 43 deg F. 12:20 AM (1/15): 50 deg F (this was the high!); max wind speed of 24 mph (NE) registered at 12:15 AM. 7:45 AM: 38 deg F (this was the low). Remained windy all night; still this morning, too: currently out of North, average (10 min.) 9 mph; current temp 40 deg F (9:40 AM). We lost 4" off total snow pack over the last 24 hrs.!
1/16/2011 8:00 AM 0.37 M M 16.0 M precipitation last 24 hrs was all rain
1/20/2011 7:00 AM 0.00 0.0 M 12.5 M
1/21/2011 8:00 AM T T M 12.5 M
1/22/2011 7:00 AM T M M 12.0 M
1/23/2011 9:00 AM 0.00 0.0 M 12.0 M
1/28/2011 7:00 AM T M M 12.5 M
1/29/2011 8:00 AM T T M 12.5 M
1/30/2011 9:00 AM 0.04 0.7 M 13.0 M Finally-- some new snow! Fell after dark last night; but windy, too, so may have lost some to sublimation by this morning.
1/31/2011 7:00 AM 0.00 0.0 M 13.0 M
2/1/2011 7:00 AM 0.00 0.0 M 13.0 M
2/2/2011 7:00 AM 0.00 0.0 M 12.5 M
2/3/2011 7:00 AM 0.00 0.0 M 12.5 M
2/4/2011 7:00 AM T M M 13.0 M
2/5/2011 7:00 AM 0.00 0.0 M 13.0 M
2/6/2011 8:00 AM 0.10 1.3 M 14.0 M Started snowing sometime after midnight; still snowing hard at observation time. Temp 29.7 deg F.
2/7/2011 8:00 AM 0.15 1.9 M 15.5 M Measured the new snowfall twice over last 24 hrs: at 2:15 PM yesterday (as 1st wave of snow was fizzling to mist, but before snow on board had a chance to melt: 1"); cleared board; measured 2nd snowfall at 8 AM this morning (0.9"). All precip out of the sky seemed frozen, though during yesterday afternoon, it melted as it hit the ground. Therefore, precip in rain gauge was part snow, part ice.
2/8/2011 8:00 AM T M M 14.5 M
2/9/2011 7:00 AM 0.00 0.0 M 14.0 4.76 Total snow depth and core were taken at 4 PM.
2/10/2011 7:00 AM 0.00 0.0 M 14.0 M
2/11/2011 7:00 AM 0.00 0.0 M 13.5 M
2/12/2011 7:00 AM 0.00 0.0 M 13.5 M
2/13/2011 7:00 AM T M M 13.0 M
2/17/2011 7:00 AM 0.00 0.0 M 12.0 M
2/18/2011 7:00 AM 0.01 0.2 M 12.5 M A new skiff of snow-- looks like graupel.
2/19/2011 7:00 AM 0.01 T M 13.0 M The new snowfall measurement might be an underestimate, as I did not measure it right after the storm ended yesterday morning.
2/20/2011 7:00 AM 0.00 0.0 M 12.5 M
2/21/2011 7:00 AM 0.00 0.0 M 12.0 4.33 24-hour rain gauge observation was taken at 7 AM; SWE and total snow depth was taken at 4 PM.
2/22/2011 7:00 AM 0.02 0.4 M 12.0 M Melted snow quantity is less than actual, as I spilled some during measuring. :(
2/23/2011 8:00 AM 0.04 0.6 M 13.0 M Snowfall started sometime overnight; still snowing at time of this report.
2/24/2011 8:00 AM 0.12 2.5 M 15.0 M Some blowing/drifting, so snowfall amounts are averages of several measurements.
2/25/2011 7:00 AM 0.00 0.0 M 14.0 M
2/26/2011 7:00 AM 0.00 0.0 M 13.5 M
2/27/2011 7:00 AM 0.01 0.3 M 14.0 M Snow occurred sometime b/w 11 PM and 6:30 AM overnight.
2/28/2011 7:00 AM 0.21 2.8 M 16.5 M
3/5/2011 7:00 AM 0.20 2.4 M 18.5 M
3/6/2011 7:00 AM 0.00 0.0 M 17.0 M
3/7/2011 7:00 AM 0.00 0.0 M 16.0 M
3/8/2011 7:00 AM 0.01 0.1 M 16.0 M Wow, the snow is piling up fast: storm only started at 6:45 this morning, and already was measurable by 7 AM! Temp 23 deg F.
3/9/2011 11:40 AM 0.10 1.2 M 17.0 M For the total gauge and new snow reports listed today: 1st measurement was taken yesterday morning at 11:30 AM, after the 1st snow storm had ended (storm lasted from 6:30 AM to 10:30 AM: times very accurate): this was 0.04" melted snow from the gauge and 0.7" new snow on the board (both accumulated since gauge and board were cleared at 7AM yesterday for the previous 24 hr. totals); gauge emptied and board cleared. There was no further precipitation until b/w 3:30AM and 6:30AM this morning, when the next snow storm started. The 2nd set of measurements were taken at 11:40 AM, just as the continuing snow fall was starting to melt as it hit the ground (temp = 31 deg F). Subtotals from this 2nd reading were: 0.06" melted snow in gauge and 0.5" new snow on board (=24 hr total since board and gauge cleared yesterday). The sum of these 2 separate measurements done in the last 28.5 hrs is what is listed on this page. Total snow depth was taken at 11:40 AM this morning. At the time of this writing (12:30 PM), it is now snowing harder;temp = 31.7 deg F.
3/10/2011 7:00 AM 0.33 3.0 M 20.0 M Note that these totals are since 11:40 AM yesterday.
3/11/2011 7:00 AM T M M 18.5 M Our trace precip was rain, not snow! Late yesterday afternoon/early evening.
3/12/2011 7:00 AM 0.00 0.0 M 17.5 M
3/13/2011 7:00 AM 0.00 0.0 M 16.5 M
3/14/2011 7:00 AM 0.76 T M 16.5 M We had a day full of mixed precip-- some snow, LOTS of rain, and freezing rain. Must be spring in the Methow!
3/17/2011 7:00 AM 0.00 0.0 M 12.5 M
3/18/2011 7:00 AM 0.03 0.7 M 13.0 M new skiff of snow this morning
3/19/2011 7:00 AM 0.44 3.3 M 16.0 M Rain yesterday, followed by over 3" snow overnight. Temp right around 32 this morning, with intermittent fog. The meadowlarks and robins are singing, trying to convince themselves spring really is around the corner!
3/20/2011 7:00 AM 0.00 0.0 M 14.0 M
3/21/2011 7:00 AM 0.37 2.0 M 14.5 M Spring is still on the fence: more of the same weather patterns: rain yesterday evening, turning to snow overnight, melting off during the day, repeat! Temp right around freezing all night; low = 31.7.
3/22/2011 7:00 AM 0.01 T M 11.5 M This time precip was slight trace of snow yesterday morning; then rain yesterday evening. Lovely rainbow towards sunset.
3/23/2011 7:00 AM 0.09 0.0 M 10.0 M Had a couple minutes of small (1-2 mm) hail at start of rain storm, ~6:55 PM last night.
3/24/2011 7:00 AM T 0.0 M 9.5 M
3/25/2011 7:00 AM 0.49 0.2 M 9.0 M rain and snow; range of total snow on ground is b/w 0 and 12"
3/30/2011 7:00 AM 0.00 0.0 M 1.0 M
3/31/2011 7:00 AM 0.16 M M T M Breezy, partly sunny, and warm yesterday (up to almost 60 deg F!); then rain overnight. Almost no snow left on our ground now-- just a few patches on our 20 acres (most of which are on south-facing slopes). Large pond of melt-water and our well is running artesian. North-facing slopes on other side of valley still have quite a bit of snow.
4/1/2011 7:00 AM 0.00 0.0 M T M
4/2/2011 7:00 AM 0.20 M M T M
4/3/2011 7:00 AM 0.00 0.0 M T M
4/4/2011 7:00 AM 0.00 0.0 M T M
4/5/2011 7:00 AM T M M T M Just a few lingering patches of snow on the ground, in shady and low areas.
4/7/2011 7:00 AM T T M T M Had snow squalls for a couple hours yesterday morning-- enough to leave a new coating on the ground! Melted by lunchtime. Crazy spring!
4/8/2011 7:00 AM 0.02 T M M M
4/9/2011 7:00 AM 0.00 0.0 M M M
4/10/2011 7:00 AM 0.00 0.0 M M M
4/11/2011 7:00 AM 0.00 0.0 M M M
4/12/2011 7:00 AM 0.00 0.0 M M M
4/13/2011 7:00 AM 0.00 0.0 M M M
4/14/2011 7:00 AM 0.02 M M M M
4/15/2011 7:00 AM 0.03 M M M M Rain mostly occurred yesterday evening b/w 6:45-10:00 PM.
4/16/2011 7:00 AM 0.00 0.0 M M M
4/17/2011 7:00 AM 0.00 0.0 M M M
4/18/2011 7:00 AM 0.00 0.0 M M M
4/19/2011 7:00 AM 0.00 0.0 M M M
4/20/2011 7:00 AM T M M M M
4/21/2011 7:00 AM T M M M M
4/22/2011 7:00 AM 0.00 0.0 M M M
4/25/2011 7:00 AM T M M M M Few sprinkles of rain ~ 10 PM last night.
4/26/2011 7:00 AM T M M M M
4/27/2011 7:00 AM 0.00 0.0 M M M
4/28/2011 7:00 AM 0.00 0.0 M M M
4/29/2011 7:00 AM 0.00 0.0 M M M
4/30/2011 7:00 AM 0.00 0.0 M M M
5/1/2011 7:00 AM 0.00 0.0 M M M
5/2/2011 7:00 AM 0.00 0.0 M M M
5/3/2011 7:00 AM 0.04 M M M M
5/4/2011 7:00 AM 0.00 0.0 M M M
5/5/2011 7:00 AM 0.00 0.0 M M M
5/6/2011 7:00 AM 0.00 0.0 M M M
5/7/2011 7:00 AM 0.07 M M M M Finally...some much-needed rain! The balsamroot will probably explode into fuller bloom now. Hillsides are getting greener.
5/8/2011 7:00 AM 0.38 M M M M Amount in gauge is a combination of rain and melted hail from yesterday's storm (reported under Hail Report). Most heavy rain fell directly after hail (hail 1:20-1:40 PM; rain 1:40 PM to ~2:30 or 3 PM); a few scattered showers later in the day.
5/9/2011 7:00 AM T M M M M
5/10/2011 7:00 AM 0.00 0.0 M M M
5/11/2011 7:00 AM 0.00 0.0 M M M
5/12/2011 8:00 PM 0.09 M M M M Our Davis wx station registered 0.2" rain at 7 AM this morning. Unfortunately, I didn't empty rain gauge until this evening, so some water may have evaporated during the day, accounting for lower reading.
5/13/2011 7:00 AM 0.00 0.0 M M M
5/14/2011 7:00 AM 0.46 M M M M Finally able to put the inner cylinder back in rain gauge w/o fear of freezing. The 0.46" in rain gauge exactly matches the amount recorded by Davis rain gauge. All this rain fell b/w 3-7 AM this morning; and still raining hard! Methow River already noticeably higher yesterday evening, after a warm day (before last night's rain). Should be an interesting weekend.
5/15/2011 7:00 AM 0.77 M M M M Davis wx station log (0.78") again agrees well with this rain gauge report. Storm total was 1.23", b/w 3 AM 5/14 and 8:15 PM 5/14 (=~ 17.25 hrs.). (Only other rainfall was very brief shower (~ T to.01") at 6:30 this morning.)
5/16/2011 7:00 AM 0.26 M M M M
5/17/2011 7:00 AM 0.01 M M M M
5/18/2011 7:00 AM 0.00 0.0 M M M
5/19/2011 7:00 AM 0.00 0.0 M M M
5/20/2011 7:00 AM 0.00 0.0 M M M
5/21/2011 7:00 AM 0.00 0.0 M M M
5/22/2011 7:00 AM 0.39 M M M M Agrees with Davis wx stn rain gauge.
5/23/2011 7:00 AM 0.16 M M M M
5/27/2011 7:00 AM 0.00 0.0 M M M
5/28/2011 7:00 AM 0.08 M M M M Davis wx stn registered 0.09".
5/29/2011 7:00 AM 0.03 M M M M Davis stn registered 0.02". It's located a bit uphill from CoCoRaHS rain gauge; typically agrees +/- 0.01".
5/30/2011 7:00 AM 0.05 M M M M Davis wx stn = 0.05" also.
5/31/2011 7:00 AM 0.25 M M M M Mad dash at 7 AM to empty the gauge; still hosing! Some scattered T-storms yesterday afternoon; most rainfall since midnight (0.19", according to Davis stn.).
6/1/2011 7:00 AM 0.28 M M M M Davis = 0.27".
6/2/2011 7:00 AM 0.17 M M M M
6/7/2011 7:00 AM 0.00 0.0 M M M
6/8/2011 7:00 AM 0.23 M M M M Davis wx stn registered only 0.17", for some reason. (usually a much closer match with the official rain gauge)
6/9/2011 7:00 AM 0.13 M M M M Davis = 0.08"
6/10/2011 7:00 AM 0.06 M M M M
6/11/2011 7:00 AM 0.00 0.0 M M M
6/12/2011 7:00 AM 0.00 0.0 M M M
6/13/2011 7:00 AM T M M M M
6/14/2011 7:00 AM 0.00 0.0 M M M
6/15/2011 7:00 AM 0.00 0.0 M M M
6/27/2011 7:00 AM 0.00 0.0 M M M
6/28/2011 7:00 AM 0.01 M M M M
6/29/2011 7:00 AM 0.01 M M M M
6/30/2011 7:00 AM 0.00 0.0 M M M
7/1/2011 7:00 AM 0.00 0.0 M M M
7/2/2011 7:00 AM 0.00 0.0 M M M
7/3/2011 7:00 AM 0.00 0.0 M M M
7/4/2011 7:00 AM 0.00 0.0 M M M
7/5/2011 7:00 AM 0.00 0.0 M M M
7/6/2011 7:00 AM 0.00 0.0 M M M
7/7/2011 7:00 AM 0.00 0.0 M M M
7/8/2011 7:00 AM 0.05 M M M M
7/9/2011 7:00 AM 0.00 0.0 M M M
7/10/2011 7:00 AM 0.00 0.0 M M M
7/11/2011 7:00 AM 0.00 0.0 M M M
7/12/2011 7:00 AM 0.00 0.0 M M M
7/13/2011 7:00 AM 0.07 M M M M
7/14/2011 7:00 AM 0.00 0.0 M M M
7/15/2011 7:00 AM 0.00 0.0 M M M
7/16/2011 7:00 AM T M M M M
7/22/2011 7:00 AM 0.00 0.0 M M M
7/23/2011 7:00 AM 0.00 0.0 M M M
7/24/2011 7:00 AM 0.00 0.0 M M M
7/25/2011 7:00 AM T M M M M
7/26/2011 7:00 AM 0.13 M M M M
7/27/2011 7:00 AM 0.00 0.0 M M M
7/28/2011 7:00 AM 0.00 0.0 M M M
7/29/2011 7:00 AM 0.00 0.0 M M M
7/30/2011 7:00 AM 0.00 0.0 M M M
7/31/2011 7:00 AM 0.00 0.0 M M M
8/1/2011 7:00 AM 0.00 0.0 M M M
8/4/2011 7:00 AM 0.00 0.0 M M M
8/5/2011 7:00 AM 0.00 0.0 M M M
8/6/2011 7:00 AM 0.00 0.0 M M M
8/7/2011 7:00 AM 0.00 0.0 M M M
8/8/2011 7:00 AM 0.00 0.0 M M M
8/9/2011 7:00 AM 0.00 0.0 M M M
8/10/2011 7:00 AM 0.00 0.0 M M M
8/11/2011 7:00 AM T M M M M
8/12/2011 7:00 AM 0.00 0.0 M M M
8/13/2011 7:00 AM 0.00 0.0 M M M
8/14/2011 7:00 AM 0.00 0.0 M M M
8/15/2011 7:00 AM 0.00 0.0 M M M
8/16/2011 7:00 AM 0.00 0.0 M M M
8/17/2011 7:00 AM 0.00 0.0 M M M
8/18/2011 7:00 AM 0.00 0.0 M M M
8/19/2011 7:00 AM 0.00 0.0 M M M
8/20/2011 7:00 AM 0.00 0.0 M M M
8/21/2011 7:00 AM 0.00 0.0 M M M
8/22/2011 7:00 AM 0.00 0.0 M M M
8/23/2011 7:00 AM 0.00 0.0 M M M
8/24/2011 7:00 AM 0.00 0.0 M M M
8/25/2011 7:00 AM 0.00 0.0 M M M
8/26/2011 7:00 AM 0.00 0.0 M M M
8/27/2011 7:00 AM 0.00 0.0 M M M
8/28/2011 7:00 AM 0.00 0.0 M M M
8/29/2011 7:00 AM 0.00 0.0 M M M
8/30/2011 7:00 AM 0.00 0.0 M M M
8/31/2011 7:00 AM 0.00 0.0 M M M
9/1/2011 7:00 AM 0.00 0.0 M M M
9/2/2011 7:00 AM 0.00 0.0 M M M
9/3/2011 7:00 AM 0.00 0.0 M M M
9/4/2011 7:00 AM 0.00 0.0 M M M
9/5/2011 7:00 AM 0.00 0.0 M M M
9/6/2011 7:00 AM 0.00 0.0 M M M
9/7/2011 7:00 AM 0.00 0.0 M M M
9/8/2011 7:00 AM 0.00 0.0 M M M
9/9/2011 7:00 AM 0.00 0.0 M M M
9/13/2011 7:00 AM 0.00 0.0 M M M
9/14/2011 7:00 AM 0.00 0.0 M M M
9/15/2011 7:00 AM 0.00 0.0 M M M
9/16/2011 7:00 AM 0.00 0.0 M M M
9/17/2011 7:00 AM 0.00 0.0 M M M
9/18/2011 7:00 AM 0.00 0.0 M M M
9/19/2011 7:00 AM 0.02 M M M M finally--rain!!
9/20/2011 7:00 AM 0.00 0.0 M M M
9/21/2011 7:00 AM 0.00 0.0 M M M
9/22/2011 7:00 AM 0.00 0.0 M M M
9/23/2011 7:00 AM 0.00 0.0 M M M
9/24/2011 7:00 AM 0.00 0.0 M M M
9/25/2011 7:00 AM T M M M M A brief thunderstorm during the night.
9/26/2011 7:00 AM 0.00 0.0 M M M
9/27/2011 7:00 AM 0.11 M M M M
9/28/2011 7:00 AM 0.00 0.0 M M M
9/29/2011 7:00 AM 0.00 0.0 M M M
9/30/2011 7:00 AM 0.00 0.0 M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
11/6/2010 11/08/2010 7:00 AM 3 0.02 M M
11/24/2010 12/07/2010 7:45 AM 14 0.37 M M Most likely all from snow; may be underestimate due to evaporation over the time period.
12/14/2010 12/16/2010 7:00 AM 3 0.05 M M This is an under-reported amount, as I spilled some of the sample when measuring. :(
1/17/2011 1/19/2011 9:00 AM 3 0.31 13.0 M Much of this precipitation was in the form of rain; we lost another 3" of snow pack over the last 3 day. It was snowing when we returned home last night (7:30 PM). Accumulated snow on snow board over 3 days was 0.1".
1/24/2011 1/27/2011 7:00 AM 4 0.02 M M
2/14/2011 2/16/2011 4:00 PM 3 0.04 M M At least some of this was rain; don't know if any was snow.
3/1/2011 3/02/2011 7:00 AM 2 0.35 19.5 M New snow on board (over 2 days) was 3.7 inches. Some of the snow that fell yesterday afternoon melted as it hit ground (though air temp was 27 deg F).
3/3/2011 3/04/2011 7:00 AM 2 T 15.5 M
3/15/2011 3/16/2011 7:00 PM 2 0.09 13.5 M
3/26/2011 3/29/2011 7:00 AM 4 0.31 M M Had a trace of snow on 3/25; then mostly rain over the weekend; no precip on 3/28. Lost a lot of snow cover on ground: only ~15% of ground still has snow on it.
4/23/2011 4/24/2011 6:30 PM 2 0.00 M M
5/24/2011 5/26/2011 7:00 AM 3 0.78 M M Davis wx stn gauge registered 0.82" in previous 24 hrs (7 AM 5/25 - 7 AM 5/26), so most (if not all) of this multi-day accumulation was during that time.
6/3/2011 6/06/2011 8:00 PM 4 0.00 M M
6/16/2011 6/26/2011 7:00 AM 11 0.33 M M
7/17/2011 7/18/2011 7:00 AM 2 0.13 M M
7/19/2011 7/21/2011 7:00 AM 3 0.05 M M
8/2/2011 8/03/2011 7:00 AM 2 0.00 M M
9/10/2011 9/12/2011 7:00 AM 3 0.00 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
5/7/2011 1:20 PM Heard 1st thunder at 1:05 PM; followed by a few splats of rain (essentially none) before hail started. Minor hail for 1st 5 minutes (pea-sized), but by 1:25, was hailing very hard, larger (3/8-1/2"), and accumulated rapidly on ground. Continuous hail for 20 minutes; transitioned to rain by 1:40 PM; then continued raining with patches of sun shining. Only a few lightning/claps of thunder throughout. Total rain accumulation for storm (~1 hr total) was 0.38". 1/2" Grape 3/8" Rice Hard|Mixed|White Ice 20 1min no damage Continuous False Before rain After smaller hail 10-20 0.5