Station Overview Station Location
Station Number ID-BT-2 Latitude 43.644483
Station Name Arco 0.9 NW Longitude -113.310783
County Butte Elevation (ft) 5370



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 09 0.64 1.63 31 1.63 31 0.00 0 0 10 2 4.8 1 1
Nov 09 0.72 0.31 29 0.31 29 0.00 0 0 5 1 4.2 3 13
Dec 09 1.00 0.38 31 0.38 31 0.00 0 0 8 2 5.5 7 10
Jan 10 0.86 1.13 31 1.13 31 0.00 0 0 10 5 14.3 9 2
Feb 10 0.73 0.09 28 0.07 24 0.02 4 1 2 3 1.2 2 3
March 10 0.83 0.44 25 0.44 25 0.00 0 0 6 2 4.5 5 1
April 10 1.01 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 10 1.24 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 10 1.14 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 10 0.52 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 10 0.61 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Sept 10 0.61 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 9.91" 3.98" 175 days 3.96" 171 0.02" 4 days 1 41 days 15 days 34.5" 27 days 30 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
10/1/2009 T
10/2/2009 0.00
10/3/2009 0.00
10/4/2009 0.05
10/5/2009 0.99
10/6/2009 0.02
10/7/2009 0.00
10/8/2009 0.01
10/9/2009 0.00
10/10/2009 0.00
10/11/2009 0.00
10/12/2009 0.00
10/13/2009 0.00
10/14/2009 0.33
10/15/2009 0.00
10/16/2009 0.00
10/17/2009 0.00
10/18/2009 0.00
10/19/2009 0.18
10/20/2009 0.01
10/21/2009 0.00
10/22/2009 T
10/23/2009 0.00
10/24/2009 0.01
10/25/2009 0.00
10/26/2009 0.00
10/27/2009 0.02
10/28/2009 0.00
10/29/2009 0.00
10/30/2009 0.01
10/31/2009 0.00
11/1/2009 0.00
11/2/2009 0.00
11/3/2009 0.00
11/4/2009 0.00
11/5/2009 0.00
11/6/2009 0.00
11/7/2009 0.01
11/8/2009 0.00
11/9/2009 0.00
11/10/2009
11/11/2009 0.00
11/12/2009 T
11/13/2009 0.00
11/14/2009 0.03
11/15/2009 0.13
11/16/2009 0.00
11/17/2009 0.00
11/18/2009 0.00
11/19/2009 0.00
11/20/2009 0.00
11/21/2009 0.00
11/22/2009 0.01
11/23/2009 0.13
11/24/2009 0.00
11/25/2009 0.00
11/26/2009 0.00
11/27/2009 0.00
11/28/2009 0.00
11/29/2009 0.00
11/30/2009 0.00
12/1/2009 0.00
12/2/2009 0.00
12/3/2009 0.00
12/4/2009 0.00
12/5/2009 0.03
12/6/2009 0.00
12/7/2009 T
12/8/2009 0.00
12/9/2009 T
12/10/2009 0.00
12/11/2009 0.00
12/12/2009 0.01
12/13/2009 0.05
12/14/2009 0.00
12/15/2009 0.00
12/16/2009 0.01
12/17/2009 0.00
12/18/2009 0.00
12/19/2009 0.00
12/20/2009 0.00
12/21/2009 0.01
12/22/2009 0.05
12/23/2009 0.20
12/24/2009 0.00
12/25/2009 0.00
12/26/2009 0.00
12/27/2009 0.00
12/28/2009 0.00
12/29/2009 0.00
12/30/2009 0.02
12/31/2009 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2010 0.01
1/2/2010 0.06
1/3/2010 0.00
1/4/2010 0.00
1/5/2010 0.00
1/6/2010 T
1/7/2010 0.00
1/8/2010 0.00
1/9/2010 0.00
1/10/2010 0.00
1/11/2010 0.00
1/12/2010 0.00
1/13/2010 0.02
1/14/2010 T
1/15/2010 0.00
1/16/2010 0.00
1/17/2010 0.00
1/18/2010 T
1/19/2010 0.17
1/20/2010 0.03
1/21/2010 0.28
1/22/2010 0.35
1/23/2010 T
1/24/2010 0.00
1/25/2010 0.00
1/26/2010 0.07
1/27/2010 0.03
1/28/2010 T
1/29/2010 0.00
1/30/2010 0.00
1/31/2010 0.11
2/1/2010 **
2/2/2010 **
2/3/2010 **
2/4/2010 0.02
2/5/2010 0.00
2/6/2010 T
2/7/2010 0.00
2/8/2010 0.00
2/9/2010 0.00
2/10/2010 0.00
2/11/2010 0.00
2/12/2010 0.02
2/13/2010 0.00
2/14/2010 0.00
2/15/2010 0.05
2/16/2010 0.00
2/17/2010 0.00
2/18/2010 0.00
2/19/2010 0.00
2/20/2010 0.00
2/21/2010 0.00
2/22/2010 0.00
2/23/2010 0.00
2/24/2010 0.00
2/25/2010 T
2/26/2010 0.00
2/27/2010 0.00
2/28/2010 T
3/1/2010 0.00
3/2/2010 0.00
3/3/2010 0.06
3/4/2010 0.04
3/5/2010 0.00
3/6/2010 0.00
3/7/2010 0.00
3/8/2010 0.00
3/9/2010 0.14
3/10/2010 0.01
3/11/2010 T
3/12/2010 0.00
3/13/2010 0.09
3/14/2010 0.10
3/15/2010 0.00
3/16/2010 0.00
3/17/2010 0.00
3/18/2010 0.00
3/19/2010 0.00
3/20/2010 0.00
3/21/2010 0.00
3/22/2010 0.00
3/23/2010 T
3/24/2010 0.00
3/25/2010 0.00
3/26/2010
3/27/2010
3/28/2010
3/29/2010
3/30/2010
3/31/2010
Day of YearDaily PrcpMultiday Prcp
4/1/2010
4/2/2010
4/3/2010
4/4/2010
4/5/2010
4/6/2010
4/7/2010
4/8/2010
4/9/2010
4/10/2010
4/11/2010
4/12/2010
4/13/2010
4/14/2010
4/15/2010
4/16/2010
4/17/2010
4/18/2010
4/19/2010
4/20/2010
4/21/2010
4/22/2010
4/23/2010
4/24/2010
4/25/2010
4/26/2010
4/27/2010
4/28/2010
4/29/2010
4/30/2010
5/1/2010
5/2/2010
5/3/2010
5/4/2010
5/5/2010
5/6/2010
5/7/2010
5/8/2010
5/9/2010
5/10/2010
5/11/2010
5/12/2010
5/13/2010
5/14/2010
5/15/2010
5/16/2010
5/17/2010
5/18/2010
5/19/2010
5/20/2010
5/21/2010
5/22/2010
5/23/2010
5/24/2010
5/25/2010
5/26/2010
5/27/2010
5/28/2010
5/29/2010
5/30/2010
5/31/2010
6/1/2010
6/2/2010
6/3/2010
6/4/2010
6/5/2010
6/6/2010
6/7/2010
6/8/2010
6/9/2010
6/10/2010
6/11/2010
6/12/2010
6/13/2010
6/14/2010
6/15/2010
6/16/2010
6/17/2010
6/18/2010
6/19/2010
6/20/2010
6/21/2010
6/22/2010
6/23/2010
6/24/2010
6/25/2010
6/26/2010
6/27/2010
6/28/2010
6/29/2010
6/30/2010
Day of YearDaily PrcpMultiday Prcp
7/1/2010
7/2/2010
7/3/2010
7/4/2010
7/5/2010
7/6/2010
7/7/2010
7/8/2010
7/9/2010
7/10/2010
7/11/2010
7/12/2010
7/13/2010
7/14/2010
7/15/2010
7/16/2010
7/17/2010
7/18/2010
7/19/2010
7/20/2010
7/21/2010
7/22/2010
7/23/2010
7/24/2010
7/25/2010
7/26/2010
7/27/2010
7/28/2010
7/29/2010
7/30/2010
7/31/2010
8/1/2010
8/2/2010
8/3/2010
8/4/2010
8/5/2010
8/6/2010
8/7/2010
8/8/2010
8/9/2010
8/10/2010
8/11/2010
8/12/2010
8/13/2010
8/14/2010
8/15/2010
8/16/2010
8/17/2010
8/18/2010
8/19/2010
8/20/2010
8/21/2010
8/22/2010
8/23/2010
8/24/2010
8/25/2010
8/26/2010
8/27/2010
8/28/2010
8/29/2010
8/30/2010
8/31/2010
9/1/2010
9/2/2010
9/3/2010
9/4/2010
9/5/2010
9/6/2010
9/7/2010
9/8/2010
9/9/2010
9/10/2010
9/11/2010
9/12/2010
9/13/2010
9/14/2010
9/15/2010
9/16/2010
9/17/2010
9/18/2010
9/19/2010
9/20/2010
9/21/2010
9/22/2010
9/23/2010
9/24/2010
9/25/2010
9/26/2010
9/27/2010
9/28/2010
9/29/2010
9/30/2010



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2009 7:00 AM T M M M M Very, very scattered snow flakes fell during the day.
10/2/2009 7:00 AM 0.00 0.0 M M M
10/3/2009 7:00 AM 0.00 0.0 M M M
10/4/2009 7:10 AM 0.05 M M M M This moisture started falling about 6:50am this morning
10/5/2009 7:15 AM 0.99 4.8 0.40 4.8 0.40 Light rain all day with snow beginning after sundown. Of the .99 inch water .59 fell as rain and .4 as melted snow. Very light snow continues.
10/6/2009 7:00 AM 0.02 0.0 M 0.0 M
10/7/2009 7:00 AM 0.00 0.0 M M M
10/8/2009 7:10 AM 0.01 M M M M
10/9/2009 7:00 AM 0.00 0.0 M M M
10/10/2009 7:00 AM 0.00 0.0 M M M
10/11/2009 7:00 AM 0.00 0.0 M M M
10/12/2009 7:10 AM 0.00 0.0 M M M
10/13/2009 7:00 AM 0.00 0.0 M M M
10/14/2009 7:30 AM 0.33 M M M M
10/15/2009 7:00 AM 0.00 0.0 M M M
10/16/2009 7:00 AM 0.00 0.0 M M M
10/17/2009 7:00 AM 0.00 0.0 M M M
10/18/2009 7:30 AM 0.00 0.0 M M M
10/19/2009 7:00 AM 0.18 M M M M Rain started about 5:15AM, measured .03 at 5:30AM.
10/20/2009 7:00 AM 0.01 M M M M
10/21/2009 7:05 AM 0.00 0.0 M M M
10/22/2009 7:00 AM T M M M M
10/23/2009 7:00 AM 0.00 0.0 M M M
10/24/2009 7:00 AM 0.01 M M M M
10/25/2009 7:00 AM 0.00 0.0 M M M
10/26/2009 7:00 AM 0.00 0.0 M M M
10/27/2009 7:00 AM 0.02 M M M M
10/28/2009 7:00 AM 0.00 0.0 M M M
10/29/2009 7:00 AM 0.00 0.0 M M M
10/30/2009 7:30 AM 0.01 M M M M
10/31/2009 7:30 AM 0.00 0.0 M M M
11/1/2009 7:00 AM 0.00 0.0 M M M
11/2/2009 7:00 AM 0.00 0.0 M M M
11/3/2009 7:00 AM 0.00 0.0 M M M
11/4/2009 6:30 AM 0.00 0.0 M M M
11/5/2009 7:00 AM 0.00 0.0 M M M
11/6/2009 7:00 AM 0.00 0.0 M M M
11/7/2009 7:00 AM 0.01 M M M M
11/8/2009 7:00 AM 0.00 0.0 M M M
11/9/2009 7:00 AM 0.00 0.0 M M M
11/11/2009 7:00 AM 0.00 0.0 M M M
11/12/2009 7:00 AM T M M M M
11/13/2009 7:00 AM 0.00 0.0 M M M
11/14/2009 7:15 AM 0.03 0.3 0.03 0.3 0.03
11/15/2009 7:00 AM 0.13 2.4 0.13 2.4 M
11/16/2009 7:00 AM 0.00 0.0 M 2.0 M
11/17/2009 7:00 AM 0.00 0.0 M 1.0 M
11/18/2009 7:00 AM 0.00 0.0 M 1.0 M
11/19/2009 7:00 AM 0.00 0.0 M 0.5 M
11/20/2009 7:00 AM 0.00 0.0 M M M
11/21/2009 7:00 AM 0.00 0.0 M M M
11/22/2009 7:00 AM 0.01 T 0.01 M M
11/23/2009 7:00 AM 0.13 1.5 0.13 1.5 0.13
11/24/2009 7:00 AM 0.00 0.0 M 1.0 M
11/25/2009 7:00 AM 0.00 0.0 M 1.0 M
11/26/2009 7:00 AM 0.00 0.0 M 1.0 M
11/27/2009 7:00 AM 0.00 0.0 M 1.0 M
11/28/2009 7:00 AM 0.00 0.0 M 0.5 M
11/29/2009 7:00 AM 0.00 0.0 M 0.5 M
11/30/2009 7:00 AM 0.00 0.0 M T M
12/1/2009 7:00 AM 0.00 0.0 M T M
12/2/2009 7:00 AM 0.00 0.0 M T M
12/3/2009 7:00 AM 0.00 0.0 M T M
12/4/2009 7:00 AM 0.00 0.0 M T M
12/5/2009 7:00 AM 0.03 0.3 0.03 0.3 M
12/6/2009 7:00 AM 0.00 0.0 M T M
12/7/2009 7:00 AM T T T T T
12/8/2009 7:00 AM 0.00 0.0 M M M
12/9/2009 7:00 AM T T T T T It has been below "0" since 5 PM 12/8/09
12/10/2009 7:00 AM 0.00 0.0 M M M
12/11/2009 7:00 AM 0.00 0.0 M M M
12/12/2009 7:00 AM 0.01 0.3 0.01 0.3 0.01 More like frost than snow--it's white and fluffy
12/13/2009 7:20 AM 0.05 0.7 0.05 0.7 0.05
12/14/2009 7:00 AM 0.00 0.0 M 0.5 M
12/15/2009 7:00 AM 0.00 0.0 M 0.3 M
12/16/2009 7:10 AM 0.01 T 0.01 0.3 M
12/17/2009 7:00 AM 0.00 0.0 M 0.3 M
12/18/2009 7:00 AM 0.00 0.0 M 0.3 M
12/19/2009 7:20 AM 0.00 0.0 M M M
12/20/2009 7:30 AM 0.00 0.0 M M M
12/21/2009 7:30 AM 0.01 0.2 0.01 0.2 M
12/22/2009 7:00 AM 0.05 0.5 0.05 0.5 0.05 Snow continues. (lite)
12/23/2009 7:30 AM 0.20 3.0 0.20 M M Snow depth at 4 PM 12/22 was 4 inches. Wind thru the night and this morning has made total snow impossible to record. Ranges from bare ground to 8 inch drifts.
12/24/2009 7:00 AM 0.00 0.0 M M M Snow cover remains as reported last report. Temps were such that no melt or noticeable settling occurred.
12/25/2009 7:20 AM 0.00 0.0 M M M
12/26/2009 7:00 AM 0.00 0.0 M M M
12/27/2009 7:20 AM 0.00 0.0 M M M Although snow level is irregular due to wind days earlier there is approximately an average of 2 inches remaining on the ground.
12/28/2009 7:00 AM 0.00 0.0 M M M
12/29/2009 7:00 AM 0.00 0.0 M M M
12/30/2009 8:00 AM 0.02 0.5 0.02 M M
12/31/2009 7:30 AM 0.00 0.0 M M M
1/1/2010 7:45 AM 0.01 0.3 0.01 M M
1/2/2010 8:10 AM 0.06 0.7 0.06 M M
1/3/2010 7:20 AM 0.00 0.0 M M M
1/4/2010 7:00 AM 0.00 0.0 M M M
1/5/2010 7:20 AM 0.00 0.0 M M M
1/6/2010 7:00 AM T T M M M Cold temperatures and foggy/cloudy weather have held the snow cover. As reported earlier, snow was disturbed by winds making accumulation difficult to measure. However I estimate the average depth to be around 2 3/4 inches.
1/7/2010 7:00 AM 0.00 0.0 M M M
1/8/2010 7:20 AM 0.00 0.0 M M M
1/9/2010 7:00 AM 0.00 0.0 M M M
1/10/2010 7:00 AM 0.00 0.0 M M M
1/11/2010 7:00 AM 0.00 0.0 M M M
1/12/2010 7:00 AM 0.00 0.0 M M M
1/13/2010 7:00 AM 0.02 0.5 0.02 M M
1/14/2010 8:00 AM T T T M M Trace appeared to be fallen frost.
1/15/2010 7:00 AM 0.00 0.0 M M M
1/16/2010 7:30 AM 0.00 0.0 M M M
1/17/2010 7:00 AM 0.00 0.0 M M M
1/18/2010 7:00 AM T T T M M
1/19/2010 7:30 AM 0.17 3.3 0.44 6.0 0.88 The reported amount was a gauged amount. Most snow fell driven by wind. A 3 1/2 in. core sample taken melted to .44 inch. The average depth of snow is approx. 3 1/4 inch. On a flat bed trailer snow depth was between 1 1/4 and 4 1/2 inches. Multiple samples, in open flat areas, were taken without much agreement closer than + or - .04
1/20/2010 7:40 AM 0.03 0.5 0.03 M M
1/21/2010 7:50 AM 0.28 2.5 0.28 M M Once again wind during the night with the snow fall has made accurate measurement difficult. gauge reading was .07 water while a core in what appeared to be average snow level measured the reported .28 inch. Measuring accumulated snow is becoming more difficult, to find an average is almost impossible. Total accumulation should be 8-9 inches since cold temps have not allowed significant melt or settling.
1/22/2010 9:20 AM 0.35 5.1 0.35 15.5 1.65
1/23/2010 7:00 AM T T T M M
1/24/2010 7:15 AM 0.00 0.0 M M M
1/25/2010 7:00 AM 0.00 0.0 M M M
1/26/2010 8:00 AM 0.07 0.4 0.07 M M
1/27/2010 7:40 AM 0.03 T M M M
1/28/2010 7:00 AM T T M M M
1/29/2010 7:00 AM 0.00 0.0 M M M
1/30/2010 7:00 AM 0.00 0.0 M M M
1/31/2010 8:00 AM 0.11 1.0 0.11 M M
2/5/2010 7:00 AM 0.00 0.0 M M M
2/6/2010 7:00 AM T T T M M
2/7/2010 7:00 AM 0.00 0.0 M M M
2/8/2010 7:00 AM 0.00 0.0 M 11.2 2.22
2/9/2010 7:00 AM 0.00 0.0 M M M
2/10/2010 7:00 AM 0.00 0.0 M M M
2/11/2010 7:00 AM 0.00 0.0 M M M
2/12/2010 7:00 AM 0.02 0.2 0.02 M M
2/13/2010 7:00 AM 0.00 0.0 M M M
2/14/2010 7:00 AM 0.00 0.0 M M M
2/15/2010 7:30 AM 0.05 1.0 0.05 12.3 2.48 It is difficult to determine an average snow depth since wind has intermittently disturbed the fall.
2/16/2010 7:00 AM 0.00 0.0 M M M
2/17/2010 7:00 AM 0.00 0.0 M M M
2/18/2010 7:00 AM 0.00 0.0 M M M
2/19/2010 7:00 AM 0.00 0.0 M M M
2/20/2010 7:00 AM 0.00 0.0 M M M
2/21/2010 7:00 AM 0.00 0.0 M M M
2/22/2010 7:00 AM 0.00 0.0 M 10.7 2.36
2/23/2010 7:00 AM 0.00 0.0 M M M
2/24/2010 7:00 AM 0.00 0.0 M M M
2/25/2010 8:00 AM T M M M M Began as frost fall around 7:30 am 2/24 and then turned to trace amount of snow
2/26/2010 7:00 AM 0.00 0.0 M M M
2/27/2010 7:00 AM 0.00 0.0 M M M
2/28/2010 7:30 AM T T M M M
3/1/2010 10:00 AM 0.00 0.0 M 9.0 2.63
3/2/2010 7:20 AM 0.00 0.0 M M M
3/3/2010 7:00 AM 0.06 0.6 0.06 M M
3/4/2010 7:00 AM 0.04 0.3 0.04 M M
3/5/2010 7:00 AM 0.00 0.0 M M M
3/6/2010 7:00 AM 0.00 0.0 M M M
3/7/2010 9:00 AM 0.00 0.0 M M M
3/8/2010 7:00 AM 0.00 0.0 M M M
3/9/2010 7:00 AM 0.14 1.6 0.14 M M
3/10/2010 7:20 AM 0.01 M M M M Unable to measure depth of new snow fall. Moisture fell as snow. Melting on most surfaces as it fell. Accumulating on the previous days snow fall which settled showing no change in accumulated snow depth from yesterdays report.
3/11/2010 7:00 AM T T M M M
3/12/2010 7:00 AM 0.00 0.0 M M M
3/13/2010 7:00 AM 0.09 0.8 0.09 M M
3/14/2010 7:00 AM 0.10 1.2 0.10 M M
3/15/2010 7:00 AM 0.00 0.0 M M M
3/16/2010 7:00 AM 0.00 0.0 M M M
3/17/2010 7:00 AM 0.00 0.0 M M M
3/18/2010 7:00 AM 0.00 0.0 M M M
3/19/2010 7:00 AM 0.00 0.0 M M M
3/20/2010 7:00 AM 0.00 0.0 M M M
3/21/2010 7:00 AM 0.00 0.0 M M M Snow in the zone that I used for weekly measurements melted away over a week ago. Snow remains in shaded areas and in residual drifts but most yard and field areas are very wet but free of snow or water.
3/22/2010 7:00 AM 0.00 0.0 M M M
3/23/2010 7:00 AM T T T M M
3/24/2010 7:00 AM 0.00 0.0 M M M
3/25/2010 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
2/1/2010 2/04/2010 2:00 PM 4 0.02 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