Station Overview Station Location
Station Number CO-SU-27 Latitude 39.7386166
Station Name Silverthorne 7.3 NW Longitude -106.161233
County Summit Elevation (ft) 9203



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 18 1.55 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 18 2.01 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 18 1.88 0.45 14 0.24 7 0.21 7 1 3 0 5.5 3 7
Jan 19 1.72 1.30 21 0.68 8 0.62 13 2 4 0 16.2 4 8
Feb 19 1.83 1.12 26 0.00 4 1.12 22 3 0 0 0.0 0 4
March 19 2.16 0.76 26 0.00 1 0.76 25 1 0 0 0.0 0 1
April 19 2.48 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 19 1.98 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 19 1.29 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 19 1.69 0.14 8 0.08 6 0.06 2 1 1 0 0.0 0 0
Aug 19 1.59 0.91 25 0.01 16 0.90 9 1 1 2 0.0 0 0
Sept 19 1.53 0.00 2 0.00 2 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 21.71" 4.68" 122 days 1.01" 44 3.67" 78 days 9 9 days 2 days 21.7" 7 days 20 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
10/1/2018
10/2/2018
10/3/2018
10/4/2018
10/5/2018
10/6/2018
10/7/2018
10/8/2018
10/9/2018
10/10/2018
10/11/2018
10/12/2018
10/13/2018
10/14/2018
10/15/2018
10/16/2018
10/17/2018
10/18/2018
10/19/2018
10/20/2018
10/21/2018
10/22/2018
10/23/2018
10/24/2018
10/25/2018
10/26/2018
10/27/2018
10/28/2018
10/29/2018
10/30/2018
10/31/2018
11/1/2018
11/2/2018
11/3/2018
11/4/2018
11/5/2018
11/6/2018
11/7/2018
11/8/2018
11/9/2018
11/10/2018
11/11/2018
11/12/2018
11/13/2018
11/14/2018
11/15/2018
11/16/2018
11/17/2018
11/18/2018
11/19/2018
11/20/2018
11/21/2018
11/22/2018
11/23/2018
11/24/2018
11/25/2018
11/26/2018
11/27/2018
11/28/2018
11/29/2018
11/30/2018
12/1/2018
12/2/2018
12/3/2018
12/4/2018
12/5/2018
12/6/2018
12/7/2018
12/8/2018
12/9/2018
12/10/2018
12/11/2018
12/12/2018
12/13/2018
12/14/2018
12/15/2018
12/16/2018 0.00
12/17/2018 **
12/18/2018 **
12/19/2018 **
12/20/2018 **
12/21/2018 **
12/22/2018 0.21
12/23/2018 0.00
12/24/2018 0.07
12/25/2018 0.15
12/26/2018 0.00
12/27/2018 0.02
12/28/2018
12/29/2018
12/30/2018 0.00
12/31/2018 **
Day of YearDaily PrcpMultiday Prcp
1/1/2019 **
1/2/2019 **
1/3/2019 **
1/4/2019 0.10
1/5/2019 0.00
1/6/2019 0.00
1/7/2019 **
1/8/2019 **
1/9/2019 **
1/10/2019 **
1/11/2019 **
1/12/2019 **
1/13/2019 **
1/14/2019 **
1/15/2019 0.52
1/16/2019 0.21
1/17/2019 0.06
1/18/2019 0.35
1/19/2019 0.06
1/20/2019 0.00
1/21/2019 0.00
1/22/2019
1/23/2019
1/24/2019
1/25/2019
1/26/2019
1/27/2019
1/28/2019
1/29/2019
1/30/2019
1/31/2019
2/1/2019
2/2/2019
2/3/2019 0.00
2/4/2019 **
2/5/2019 **
2/6/2019 **
2/7/2019 **
2/8/2019 **
2/9/2019 0.44
2/10/2019 0.00
2/11/2019 **
2/12/2019 **
2/13/2019 **
2/14/2019 **
2/15/2019 **
2/16/2019 **
2/17/2019 **
2/18/2019 0.53
2/19/2019 0.00
2/20/2019 **
2/21/2019 **
2/22/2019 **
2/23/2019 **
2/24/2019 0.15
2/25/2019 0.00
2/26/2019 **
2/27/2019 **
2/28/2019 **
3/1/2019 **
3/2/2019 **
3/3/2019 **
3/4/2019 **
3/5/2019 **
3/6/2019 **
3/7/2019 **
3/8/2019 **
3/9/2019 **
3/10/2019 **
3/11/2019 **
3/12/2019 **
3/13/2019 **
3/14/2019 **
3/15/2019 **
3/16/2019 **
3/17/2019 **
3/18/2019 **
3/19/2019 **
3/20/2019 **
3/21/2019 **
3/22/2019 **
3/23/2019 **
3/24/2019 **
3/25/2019 0.76
3/26/2019 0.00
3/27/2019
3/28/2019
3/29/2019
3/30/2019
3/31/2019
Day of YearDaily PrcpMultiday Prcp
4/1/2019
4/2/2019
4/3/2019
4/4/2019
4/5/2019
4/6/2019
4/7/2019
4/8/2019
4/9/2019
4/10/2019
4/11/2019
4/12/2019
4/13/2019
4/14/2019
4/15/2019
4/16/2019
4/17/2019
4/18/2019
4/19/2019
4/20/2019
4/21/2019
4/22/2019
4/23/2019
4/24/2019
4/25/2019
4/26/2019
4/27/2019
4/28/2019
4/29/2019
4/30/2019
5/1/2019
5/2/2019
5/3/2019
5/4/2019
5/5/2019
5/6/2019
5/7/2019
5/8/2019
5/9/2019
5/10/2019
5/11/2019
5/12/2019
5/13/2019
5/14/2019
5/15/2019
5/16/2019
5/17/2019
5/18/2019
5/19/2019
5/20/2019
5/21/2019
5/22/2019
5/23/2019
5/24/2019
5/25/2019
5/26/2019
5/27/2019
5/28/2019
5/29/2019
5/30/2019
5/31/2019
6/1/2019
6/2/2019
6/3/2019
6/4/2019
6/5/2019
6/6/2019
6/7/2019
6/8/2019
6/9/2019
6/10/2019
6/11/2019
6/12/2019
6/13/2019
6/14/2019
6/15/2019
6/16/2019
6/17/2019
6/18/2019
6/19/2019
6/20/2019
6/21/2019
6/22/2019
6/23/2019
6/24/2019
6/25/2019
6/26/2019
6/27/2019
6/28/2019
6/29/2019
6/30/2019
Day of YearDaily PrcpMultiday Prcp
7/1/2019
7/2/2019
7/3/2019
7/4/2019
7/5/2019
7/6/2019
7/7/2019
7/8/2019
7/9/2019
7/10/2019
7/11/2019
7/12/2019 0.00
7/13/2019 0.00
7/14/2019
7/15/2019
7/16/2019
7/17/2019
7/18/2019 0.00
7/19/2019
7/20/2019
7/21/2019 0.08
7/22/2019 0.00
7/23/2019
7/24/2019
7/25/2019
7/26/2019 **
7/27/2019 0.06
7/28/2019
7/29/2019 0.00
7/30/2019
7/31/2019
8/1/2019
8/2/2019
8/3/2019 **
8/4/2019 **
8/5/2019 **
8/6/2019 **
8/7/2019 **
8/8/2019 **
8/9/2019 **
8/10/2019 **
8/11/2019 0.90
8/12/2019
8/13/2019
8/14/2019 0.00
8/15/2019 0.00
8/16/2019 0.00
8/17/2019 0.01
8/18/2019 T
8/19/2019 0.00
8/20/2019 0.00
8/21/2019 T
8/22/2019 0.00
8/23/2019
8/24/2019 0.00
8/25/2019
8/26/2019 0.00
8/27/2019 0.00
8/28/2019 0.00
8/29/2019 0.00
8/30/2019 0.00
8/31/2019 0.00
9/1/2019 0.00
9/2/2019 0.00
9/3/2019
9/4/2019
9/5/2019
9/6/2019
9/7/2019
9/8/2019
9/9/2019
9/10/2019
9/11/2019
9/12/2019
9/13/2019
9/14/2019
9/15/2019
9/16/2019
9/17/2019
9/18/2019
9/19/2019
9/20/2019
9/21/2019
9/22/2019
9/23/2019
9/24/2019
9/25/2019
9/26/2019
9/27/2019
9/28/2019
9/29/2019
9/30/2019



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
12/16/2018 7:40 AM 0.00 0.0 M 15.0 M SU27 EDW 121618 0740 CLR 20+ mi Depth 12-20 avg 15 inches sugar snow
12/23/2018 7:00 AM 0.00 0.0 M 18.0 M Sugar snow base
12/24/2018 7:00 AM 0.07 1.3 M 19.5 M S- v S--
12/25/2018 7:00 AM 0.15 3.2 M 21.0 M S- v S v SW- -
12/26/2018 8:00 AM 0.00 0.0 M 19.0 M Two Moose passing thru site
12/27/2018 7:00 AM 0.02 1.0 M 20.0 M
12/30/2018 8:30 AM 0.00 0.0 M 18.0 M
1/5/2019 8:30 AM 0.00 0.0 M 17.8 M 010519 0830 SU27 CLR AcL SE on Divide Depth 17.5-18 inches avg 17.8 Sugar snow
1/6/2019 8:00 AM 0.00 0.0 M 17.0 M
1/16/2019 7:00 AM 0.21 6.0 M 24.3 M SU27: 0116190700 Ns S- BS Drifting 0.3 mi 28ºF New 6.0 SWE 0.21, Depth 24.3 (23-26) inches
1/17/2019 7:00 AM 0.06 2.0 M 26.3 M SU27: 0117190700 AcL Cs SCT 20+ mi BS New 2.0 SWE .06 Depth 26.3 (25-28) inches
1/18/2019 7:00 AM 0.35 6.5 M 30.8 M
1/19/2019 7:00 AM 0.06 1.7 M 31.0 M SU27 011919 0700 Ns SW - - SW- ALL DAY NEW 1.7 SWE 0.06; DEPTH 31.5 (30-32) INCHES
1/20/2019 7:00 AM 0.00 0.0 M 29.0 M SU27 0120190700 Sc AcL SCT 20 mi Depth 29 inches
1/21/2019 6:00 AM 0.00 0.0 M 28.3 M SU27 0121190600 Sc SCT Depth 26-31 avg : 28.3 inches
2/3/2019 6:00 AM 0.00 0.0 M 28.7 M SU27 0203190600 Sc Cu+ SCT v BKN Depth 28.7 (26-31) inches CLR AcL SCT on ridges
2/10/2019 6:00 AM 0.00 0.0 M 31.0 M SU27 0210190600 Depth 34+29+30 = avg 31.0 inches CLR
2/19/2019 7:00 AM 0.00 0.0 M 33.3 M SU27 0219190700 As OVC Depth 33.3 (32-34) inches sugar snow layers
2/25/2019 6:00 AM 0.00 0.0 M 35.0 M SU27 0225190600 Cs BKN 20 mi 9ºF 0.0 New, Depth 35.0 (33-36) inches
3/26/2019 7:00 AM 0.00 0.0 M 41.6 M 0326190700 SU27 AcL SCT 20+ mi Depth 41.6 (38-44) inches; Hard pack drifts to 6 ft
7/12/2019 7:00 AM 0.00 0.0 M M M
7/13/2019 7:00 AM 0.00 0.0 M M M
7/18/2019 8:00 AM 0.00 0.0 M M M 071819 0800 Cs BKN 20+ mi 50º no rain
7/21/2019 7:00 AM 0.08 0.0 M 0.0 M 0721190600 CLR QPE 0.08 RW SCT TRW
7/22/2019 6:00 AM 0.00 0.0 M M M CLR
7/29/2019 6:00 AM 0.00 0.0 M 0.0 M CLR Cu SCT
8/14/2019 6:00 AM 0.00 0.0 M M M SU27 081419 0600 Ac BKN 20+ mi CLR 0700-1200 Few Cu PM
8/15/2019 6:00 AM 0.00 0.0 M 0.0 M Ac Cu All Day 0600 CLR
8/16/2019 6:00 AM 0.00 0.0 M M M FEW Cu all day
8/17/2019 6:00 AM 0.01 0.0 M 0.0 M Cu AM Cu+ VIRGA RW-- SCT PM QPE 0.01 1700-1730
8/18/2019 6:00 AM T 0.0 M 0.0 M CLR Cu Cu+ Widely scat RW- - VIRGA 1630-1730
8/19/2019 6:00 AM 0.00 0.0 M 0.0 M HOT and DRY with Winds
8/20/2019 8:00 AM 0.00 0.0 M 0.0 M Cs SCT
8/21/2019 6:00 AM T 0.0 M 0.0 M SCT RW - - 1600-1800
8/22/2019 6:00 AM 0.00 0.0 M 0.0 M Cu Cu+ SCT VIRGA
8/24/2019 6:00 AM 0.00 0.0 M 0.0 M Ac Cu VIRGA
8/26/2019 6:00 AM 0.00 0.0 M 0.0 M CLR WINDY YESTERDAY Cu SCT v BKN
8/27/2019 6:00 AM 0.00 0.0 M M M Clear windy afternoon significant Evaporation drying
8/28/2019 6:00 AM 0.00 0.0 M 0.0 M CLR frost
8/29/2019 6:30 AM 0.00 0.0 M 0.0 M CLR all day windy RH 13% very dry
8/30/2019 6:00 AM 0.00 0.0 M M M Ac SCT
8/31/2019 6:00 AM 0.00 0.0 M 0.0 M CLR Ac SCT PM
9/1/2019 7:00 AM 0.00 0.0 M M M FEW Ac VERY DRY
9/2/2019 7:00 AM 0.00 0.0 M M M 0902190700 CLR HOT Dusty CLR Cu SCT all day



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
12/17/2018 12/22/2018 7:00 AM 6 0.21 18.0 M
12/31/2018 1/04/2019 3:00 PM 5 0.10 17.8 M Cold and dry Sugar snow New snow ~1.5 inches Temp -8 to 43ºF Min Max
1/7/2019 1/15/2019 3:00 PM 9 0.52 24.3 M 3 snow poles 24.5 23.5 25 inches Avg 24.3 inches
2/4/2019 2/09/2019 2:00 PM 6 0.44 31.0 M New snow depth 6.0 total new snow storm depth was 12.0 Temp range 45 to -20ºF
2/11/2019 2/18/2019 3:00 PM 8 0.53 33.3 M SU27 0211-18 2019 Total SWE 0.53 New 4-6 inches Depth 33.3 (32-34) inches Tmx 52 Min -2ºF
2/20/2019 2/24/2019 3:00 PM 5 0.15 35.0 M SU27 Accum period 022019 to 022419 New 5 (3-6) SWE 0.15 Depth 35 (33-36) inches Tmxmn 42 -8ºF
2/26/2019 3/25/2019 3:00 PM 28 0.76 41.6 M Deep hardpack snow Tmxmn 58 -9ºF >0.76 inches SWE
7/26/2019 7/27/2019 11:00 AM 2 0.06 0.0 0.00 Monsoon showers
8/3/2019 8/11/2019 3:00 PM 9 0.90 0.0 0.00 SU27 0811191500 Ns R- v R total accum 0803 to 0811: 0.90 inches



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