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 19 1.55 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 19 2.01 0.00 7 0.00 2 0.00 5 0 0 0 0.0 0 1
Dec 19 1.88 2.10 31 0.00 1 2.10 30 1 0 0 0.0 0 1
Jan 20 1.72 0.22 5 0.00 2 0.22 3 1 0 1 0.0 0 2
Feb 20 1.83 0.08 3 0.08 3 0.00 0 0 1 0 0.8 1 3
March 20 2.16 0.00 1 0.00 1 0.00 0 0 0 0 0.0 0 1
April 20 2.48 0.00 1 0.00 1 0.00 0 0 0 0 0.0 0 1
May 20 1.98 0.00 1 0.00 1 0.00 0 0 0 0 0.0 0 0
June 20 1.29 0.18 17 0.04 1 0.14 16 1 1 0 0.0 0 0
July 20 1.69 0.73 16 0.38 8 0.35 8 3 4 0 0.0 0 0
Aug 20 1.59 0.52 14 0.02 8 0.50 6 2 1 2 0.0 0 0
Sept 20 1.53 0.17 25 0.17 20 0.00 5 1 1 0 0.0 0 0
Water Year Totals: 21.71" 4.00" 121 days 0.69" 48 3.31" 73 days 9 8 days 3 days 0.8" 1 days 9 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
10/1/2019
10/2/2019
10/3/2019
10/4/2019
10/5/2019
10/6/2019
10/7/2019
10/8/2019
10/9/2019
10/10/2019
10/11/2019
10/12/2019
10/13/2019
10/14/2019
10/15/2019
10/16/2019
10/17/2019
10/18/2019
10/19/2019
10/20/2019
10/21/2019
10/22/2019
10/23/2019
10/24/2019
10/25/2019
10/26/2019
10/27/2019
10/28/2019
10/29/2019
10/30/2019
10/31/2019
11/1/2019
11/2/2019
11/3/2019
11/4/2019
11/5/2019
11/6/2019
11/7/2019
11/8/2019
11/9/2019
11/10/2019
11/11/2019
11/12/2019
11/13/2019
11/14/2019
11/15/2019
11/16/2019 0.00
11/17/2019
11/18/2019 0.00
11/19/2019
11/20/2019
11/21/2019
11/22/2019
11/23/2019
11/24/2019
11/25/2019
11/26/2019 **
11/27/2019 **
11/28/2019 **
11/29/2019 **
11/30/2019 **
12/1/2019 **
12/2/2019 **
12/3/2019 **
12/4/2019 **
12/5/2019 **
12/6/2019 **
12/7/2019 **
12/8/2019 **
12/9/2019 **
12/10/2019 **
12/11/2019 **
12/12/2019 **
12/13/2019 **
12/14/2019 **
12/15/2019 **
12/16/2019 **
12/17/2019 **
12/18/2019 **
12/19/2019 **
12/20/2019 **
12/21/2019 **
12/22/2019 **
12/23/2019 2.10
12/24/2019 0.00
12/25/2019 **
12/26/2019 **
12/27/2019 **
12/28/2019 **
12/29/2019 **
12/30/2019 **
12/31/2019 **
Day of YearDaily PrcpMultiday Prcp
1/1/2020 **
1/2/2020 **
1/3/2020 0.22
1/4/2020 T
1/5/2020 0.00
1/6/2020
1/7/2020
1/8/2020
1/9/2020
1/10/2020
1/11/2020
1/12/2020
1/13/2020
1/14/2020
1/15/2020
1/16/2020
1/17/2020
1/18/2020
1/19/2020
1/20/2020
1/21/2020
1/22/2020
1/23/2020
1/24/2020
1/25/2020
1/26/2020
1/27/2020
1/28/2020
1/29/2020
1/30/2020
1/31/2020
2/1/2020
2/2/2020
2/3/2020
2/4/2020
2/5/2020
2/6/2020
2/7/2020
2/8/2020
2/9/2020
2/10/2020
2/11/2020 0.08
2/12/2020 0.00
2/13/2020
2/14/2020
2/15/2020 0.00
2/16/2020
2/17/2020
2/18/2020
2/19/2020
2/20/2020
2/21/2020
2/22/2020
2/23/2020
2/24/2020
2/25/2020
2/26/2020
2/27/2020
2/28/2020
2/29/2020
3/1/2020
3/2/2020
3/3/2020
3/4/2020
3/5/2020
3/6/2020
3/7/2020
3/8/2020
3/9/2020
3/10/2020
3/11/2020
3/12/2020
3/13/2020
3/14/2020
3/15/2020
3/16/2020 0.00
3/17/2020
3/18/2020
3/19/2020
3/20/2020
3/21/2020
3/22/2020
3/23/2020
3/24/2020
3/25/2020
3/26/2020
3/27/2020
3/28/2020
3/29/2020
3/30/2020
3/31/2020
Day of YearDaily PrcpMultiday Prcp
4/1/2020
4/2/2020 0.00
4/3/2020
4/4/2020
4/5/2020
4/6/2020
4/7/2020
4/8/2020
4/9/2020
4/10/2020
4/11/2020
4/12/2020
4/13/2020
4/14/2020
4/15/2020
4/16/2020
4/17/2020
4/18/2020
4/19/2020
4/20/2020
4/21/2020
4/22/2020
4/23/2020
4/24/2020
4/25/2020
4/26/2020
4/27/2020
4/28/2020
4/29/2020
4/30/2020
5/1/2020
5/2/2020
5/3/2020
5/4/2020
5/5/2020
5/6/2020
5/7/2020
5/8/2020
5/9/2020
5/10/2020 0.00
5/11/2020
5/12/2020
5/13/2020
5/14/2020
5/15/2020
5/16/2020
5/17/2020
5/18/2020
5/19/2020
5/20/2020
5/21/2020
5/22/2020
5/23/2020
5/24/2020
5/25/2020
5/26/2020
5/27/2020
5/28/2020
5/29/2020
5/30/2020
5/31/2020
6/1/2020
6/2/2020
6/3/2020
6/4/2020
6/5/2020
6/6/2020
6/7/2020
6/8/2020
6/9/2020
6/10/2020
6/11/2020
6/12/2020
6/13/2020
6/14/2020 0.04
6/15/2020 **
6/16/2020 **
6/17/2020 **
6/18/2020 **
6/19/2020 **
6/20/2020 **
6/21/2020 **
6/22/2020 0.14
6/23/2020 **
6/24/2020 **
6/25/2020 **
6/26/2020 **
6/27/2020 **
6/28/2020 **
6/29/2020 **
6/30/2020 **
Day of YearDaily PrcpMultiday Prcp
7/1/2020 **
7/2/2020 0.08
7/3/2020 0.00
7/4/2020 0.01
7/5/2020 0.25
7/6/2020 **
7/7/2020 **
7/8/2020 **
7/9/2020 0.04
7/10/2020 0.00
7/11/2020 0.00
7/12/2020 0.00
7/13/2020 0.06
7/14/2020 0.06
7/15/2020 **
7/16/2020 0.23
7/17/2020
7/18/2020
7/19/2020
7/20/2020
7/21/2020
7/22/2020
7/23/2020
7/24/2020
7/25/2020
7/26/2020
7/27/2020
7/28/2020
7/29/2020
7/30/2020
7/31/2020
8/1/2020
8/2/2020
8/3/2020
8/4/2020
8/5/2020
8/6/2020
8/7/2020
8/8/2020
8/9/2020
8/10/2020
8/11/2020
8/12/2020 0.00
8/13/2020 T
8/14/2020 0.00
8/15/2020 0.00
8/16/2020
8/17/2020
8/18/2020
8/19/2020 T
8/20/2020 **
8/21/2020 0.07
8/22/2020 0.00
8/23/2020
8/24/2020 0.00
8/25/2020
8/26/2020 0.02
8/27/2020 **
8/28/2020 **
8/29/2020 **
8/30/2020 0.43
8/31/2020
9/1/2020 0.17
9/2/2020 0.00
9/3/2020 0.00
9/4/2020
9/5/2020 0.00
9/6/2020 0.00
9/7/2020 0.00
9/8/2020 **
9/9/2020 **
9/10/2020 **
9/11/2020 **
9/12/2020 M
9/13/2020 0.00
9/14/2020 0.00
9/15/2020 0.00
9/16/2020 0.00
9/17/2020 0.00
9/18/2020 0.00
9/19/2020 0.00
9/20/2020 0.00
9/21/2020
9/22/2020
9/23/2020
9/24/2020 0.00
9/25/2020 0.00
9/26/2020 0.00
9/27/2020 0.00
9/28/2020
9/29/2020 0.00
9/30/2020 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
11/16/2019 7:00 AM 0.00 0.0 M 0.0 M ACL on Divide Cs BKN
11/18/2019 6:00 AM 0.00 0.0 M 2.0 M Depth 0-14 inches 70% Cover hard pack average estimate 2 inches. Total water accumulation from Sept 1 to 17 Nov 2019 1.25 inches (much evaporation losses)
12/24/2019 7:00 AM 0.00 0.0 M 19.0 M Snow crusty Depth 12-23 inches Avg 19 inches Moose tracks
1/4/2020 8:00 AM T T M 18.5 M SU27 EDW 010420 0800 Cs BKN 20+ mi T new Depth 18.5 (18-19) inches Total SWE 0.22 24 DEC to 3 JAN > 4.5 inches
1/5/2020 6:00 AM 0.00 0.0 M 17.0 M SU27 0105200600 CLR Depth 15-18 Avg 17 inches Tmxmn 40 3ºF
2/11/2020 7:00 AM 0.08 0.8 M 40.0 M Depth 36-44 avg 40 inches
2/12/2020 7:00 AM 0.00 0.0 M 37.0 M 0212200600 SU27 As OVC 10 mi SCT SW- - Depth 36-38 inches avg 37 drifts to 50 inches CLR all day Temp Max Min 12 -10ºF
2/15/2020 7:00 AM 0.00 0.0 M 37.0 M 0215200700 CLR few Cu Depth 36-38 avg 37 inches
3/16/2020 7:00 AM 0.00 0.0 M 26.0 M DEPTH 24-28 AVG 26 INCHES ROTTEN SNOW IN PLACES OTHER HARD PACK MELTING AND SUBLIMATION
4/2/2020 8:00 AM 0.00 0.0 M 20.0 M DEPTH 18, 22 INCHES AVG 20.0 INCHES AREAS OF ROTTEN SNOW MELT AND SUBLIMATION
5/10/2020 7:00 AM 0.00 0.0 M 0.0 M all snow on S facing slope melted except drifts and roof unloading around house; Boulder Creek Rapid runoff Keller Mountain Solid snow cover Tmxmn 70 19ºF
6/14/2020 8:00 AM 0.04 0.0 M 0.0 M SCT RW- TRW- - Tmxmn 74 48ºF RW- - BGN 1400 Strong gusty winds Blowing dust
7/3/2020 7:00 AM 0.00 0.0 M M M 0703200800 SU27 Cu SCT Toal QPE 0.08 23 June to 2 July > 0.08 inches
7/4/2020 7:00 AM 0.01 0.0 M 0.0 M 0704200700 SU27 As SCT RW- - QPE 0.01
7/5/2020 6:00 AM 0.25 0.0 M 0.0 M 0705200600 SU27 CLR RW- RW QPE 0.25 INCHES
7/10/2020 7:00 AM 0.00 0.0 M M M very dry dusty
7/11/2020 6:00 AM 0.00 0.0 M 0.0 M 0711200600 SU27 CLR very dry dusty
7/12/2020 6:00 AM 0.00 0.0 M 0.0 M Hot and dusty
7/13/2020 7:00 AM 0.06 0.0 M 0.0 M RW-
7/14/2020 7:00 AM 0.06 M M M M TRW- -
8/12/2020 8:00 AM 0.00 0.0 M 0.0 M 0812200800 SU27 Ac SCT CLR 20 mi Tmxmn 86 37ºF VERY DRY
8/13/2020 8:00 AM T 0.0 M 0.0 M RW- - 1400 QPE T Tmxmn 85 37ºF
8/14/2020 7:00 AM 0.00 0.0 M M M Hot and Dusty extremely Dry
8/15/2020 6:00 AM 0.00 0.0 M M M HEAVY SMOKE WILLIAMS FORK FIRE 5 MI NE
8/19/2020 7:00 AM T M M M M VIRGA Tmxmn 87 44º F Hot and dusty deep dust on roads few droplets in dust
8/22/2020 8:00 AM 0.00 0.0 M M M Extreme drought deep dust
8/24/2020 7:00 AM 0.00 0.0 M M M Hot dusty -X K H
8/26/2020 7:00 AM 0.02 M M M M SCT RW- - TRW- - QPE 0.02
9/1/2020 8:00 AM 0.17 0.0 M 0.0 M 0901200700 Sc St BKN QPE 0.17 inches Ground still dusty below surface Tmxmn 68 35ºF
9/2/2020 8:00 AM 0.00 0.0 M 0.0 M 0902200800 CLR 20+ mi QPE 0.0 Tmxmn 65 33ºF
9/3/2020 7:00 AM 0.00 0.0 M M M Cs BKN dust is back
9/5/2020 8:00 AM 0.00 0.0 M 0.0 M VERY DRY Dusty Tmxmn 82 32ºF
9/6/2020 7:00 AM 0.00 0.0 M M M VERY DRY TMXMN 85 44ºF GROUND IS TOP LAYER OF DUST
9/7/2020 7:00 AM 0.00 0.0 M M M VERY DRY hot and dusty
9/13/2020 7:00 AM 0.00 0.0 M M M Dry cool
9/14/2020 7:00 AM 0.00 0.0 M 0.0 M 0914200730 SU27 CLR DRY
9/15/2020 6:00 AM 0.00 0.0 M 0.0 M 0915200600 CLR Tmxmn 75 33º DRY
9/16/2020 8:00 AM 0.00 0.0 M 0.0 M 0916200800 X K++ H Very dry
9/17/2020 7:00 AM 0.00 0.0 M M M
9/18/2020 6:00 AM 0.00 0.0 M 0.0 M 0918200600 -X K H Ac Cs BKN very dry
9/19/2020 7:00 AM 0.00 0.0 M M M
9/20/2020 7:00 AM 0.00 0.0 M 0.0 M 0920200600 Ac BKN Very DRY
9/24/2020 7:00 AM 0.00 0.0 M 0.0 M 0224200600 SU27 cum 0.02 inches VERY DRY Dusty Tmxmn 73 32ºF
9/25/2020 7:00 AM 0.00 0.0 M M M
9/26/2020 6:00 AM 0.00 0.0 M M M Windy Smoky VERy DRy warm
9/27/2020 7:00 AM 0.00 0.0 M M M Very WINDY and DRY
9/29/2020 7:00 AM 0.00 0.0 M M M cool and dry CLR
9/30/2020 7:00 AM 0.00 0.0 M M M CLR very dry soil



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
11/26/2019 12/23/2019 3:00 PM 28 2.10 19.5 M Crusty Snow, Moose tracks, Tmxmn 55º -17ºF Depth at snow poles 12-24 inches
12/25/2019 1/03/2020 7:00 AM 10 0.22 18.5 M SU27 EDW 010420 0800 Cs BKN 20+ mi T new Depth 18.5 (18-19) inches Total SWE 0.22 24 DEC to 3 JAN > 4.5 inches
6/15/2020 6/22/2020 7:00 AM 8 0.14 M M Tmx mn 84 28ºF Dry and dusty
6/23/2020 7/02/2020 7:00 AM 10 0.08 0.0 M 0703200800 SU27 Cu SCT Total QPE 0.08 15 june to 2 July > 0.08 inches
7/6/2020 7/09/2020 7:00 AM 4 0.04 0.0 M very dry Tmxmn 84 29ºF
7/15/2020 7/16/2020 7:00 AM 2 0.23 0.0 0.00 TRW- SCT
8/20/2020 8/21/2020 1:00 PM 2 0.07 0.0 M Very hot and dusty Tmxmn 92 39ºF
8/27/2020 8/30/2020 12:30 PM 4 0.43 0.0 M 0830201230 SU27 QPE sum 27-30 Aug 0.43 inches Tmxmn 85 36º F
9/8/2020 9/12/2020 7:00 AM 5 M 0.0 M Tmxmn 72 22ºF {EDIT: Observer reported 7.00 for new precip. This is high and appears to be a decimal typo. Changed report of 7.00 to NA until observer can be contacted to verify. Submission Time Before EDIT: 9/13/2020 9:24 AM CoCoSTAFF DNT}



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