Station Overview Station Location
Station Number MT-BV-18 Latitude 45.4219
Station Name Polaris 3.7 NNE Longitude -113.102
County Beaverhead Elevation (ft) 6636



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 14 1.07 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 14 1.08 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 14 0.81 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 15 1.06 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 15 0.77 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 15 1.16 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 15 1.37 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 15 2.56 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 15 2.28 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
July 15 1.38 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 15 1.19 0.81 30 0.81 30 0.00 0 0 8 3 0.0 0 0
Sept 15 1.05 1.62 28 0.59 15 1.03 13 1 3 1 0.0 0 0
Water Year Totals: 15.78" 2.43" 58 days 1.40" 45 1.03" 13 days 1 11 days 4 days 0.0" 0 days 0 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
10/1/2014
10/2/2014
10/3/2014
10/4/2014
10/5/2014
10/6/2014
10/7/2014
10/8/2014
10/9/2014
10/10/2014
10/11/2014
10/12/2014
10/13/2014
10/14/2014
10/15/2014
10/16/2014
10/17/2014
10/18/2014
10/19/2014
10/20/2014
10/21/2014
10/22/2014
10/23/2014
10/24/2014
10/25/2014
10/26/2014
10/27/2014
10/28/2014
10/29/2014
10/30/2014
10/31/2014
11/1/2014
11/2/2014
11/3/2014
11/4/2014
11/5/2014
11/6/2014
11/7/2014
11/8/2014
11/9/2014
11/10/2014
11/11/2014
11/12/2014
11/13/2014
11/14/2014
11/15/2014
11/16/2014
11/17/2014
11/18/2014
11/19/2014
11/20/2014
11/21/2014
11/22/2014
11/23/2014
11/24/2014
11/25/2014
11/26/2014
11/27/2014
11/28/2014
11/29/2014
11/30/2014
12/1/2014
12/2/2014
12/3/2014
12/4/2014
12/5/2014
12/6/2014
12/7/2014
12/8/2014
12/9/2014
12/10/2014
12/11/2014
12/12/2014
12/13/2014
12/14/2014
12/15/2014
12/16/2014
12/17/2014
12/18/2014
12/19/2014
12/20/2014
12/21/2014
12/22/2014
12/23/2014
12/24/2014
12/25/2014
12/26/2014
12/27/2014
12/28/2014
12/29/2014
12/30/2014
12/31/2014
Day of YearDaily PrcpMultiday Prcp
1/1/2015
1/2/2015
1/3/2015
1/4/2015
1/5/2015
1/6/2015
1/7/2015
1/8/2015
1/9/2015
1/10/2015
1/11/2015
1/12/2015
1/13/2015
1/14/2015
1/15/2015
1/16/2015
1/17/2015
1/18/2015
1/19/2015
1/20/2015
1/21/2015
1/22/2015
1/23/2015
1/24/2015
1/25/2015
1/26/2015
1/27/2015
1/28/2015
1/29/2015
1/30/2015
1/31/2015
2/1/2015
2/2/2015
2/3/2015
2/4/2015
2/5/2015
2/6/2015
2/7/2015
2/8/2015
2/9/2015
2/10/2015
2/11/2015
2/12/2015
2/13/2015
2/14/2015
2/15/2015
2/16/2015
2/17/2015
2/18/2015
2/19/2015
2/20/2015
2/21/2015
2/22/2015
2/23/2015
2/24/2015
2/25/2015
2/26/2015
2/27/2015
2/28/2015
3/1/2015
3/2/2015
3/3/2015
3/4/2015
3/5/2015
3/6/2015
3/7/2015
3/8/2015
3/9/2015
3/10/2015
3/11/2015
3/12/2015
3/13/2015
3/14/2015
3/15/2015
3/16/2015
3/17/2015
3/18/2015
3/19/2015
3/20/2015
3/21/2015
3/22/2015
3/23/2015
3/24/2015
3/25/2015
3/26/2015
3/27/2015
3/28/2015
3/29/2015
3/30/2015
3/31/2015
Day of YearDaily PrcpMultiday Prcp
4/1/2015
4/2/2015
4/3/2015
4/4/2015
4/5/2015
4/6/2015
4/7/2015
4/8/2015
4/9/2015
4/10/2015
4/11/2015
4/12/2015
4/13/2015
4/14/2015
4/15/2015
4/16/2015
4/17/2015
4/18/2015
4/19/2015
4/20/2015
4/21/2015
4/22/2015
4/23/2015
4/24/2015
4/25/2015
4/26/2015
4/27/2015
4/28/2015
4/29/2015
4/30/2015
5/1/2015
5/2/2015
5/3/2015
5/4/2015
5/5/2015
5/6/2015
5/7/2015
5/8/2015
5/9/2015
5/10/2015
5/11/2015
5/12/2015
5/13/2015
5/14/2015
5/15/2015
5/16/2015
5/17/2015
5/18/2015
5/19/2015
5/20/2015
5/21/2015
5/22/2015
5/23/2015
5/24/2015
5/25/2015
5/26/2015
5/27/2015
5/28/2015
5/29/2015
5/30/2015
5/31/2015
6/1/2015
6/2/2015
6/3/2015
6/4/2015
6/5/2015
6/6/2015
6/7/2015
6/8/2015
6/9/2015
6/10/2015
6/11/2015
6/12/2015
6/13/2015
6/14/2015
6/15/2015
6/16/2015
6/17/2015
6/18/2015
6/19/2015
6/20/2015
6/21/2015
6/22/2015
6/23/2015
6/24/2015
6/25/2015
6/26/2015
6/27/2015
6/28/2015
6/29/2015
6/30/2015
Day of YearDaily PrcpMultiday Prcp
7/1/2015
7/2/2015
7/3/2015
7/4/2015
7/5/2015
7/6/2015
7/7/2015
7/8/2015
7/9/2015
7/10/2015
7/11/2015
7/12/2015
7/13/2015
7/14/2015
7/15/2015
7/16/2015
7/17/2015
7/18/2015
7/19/2015
7/20/2015
7/21/2015
7/22/2015
7/23/2015
7/24/2015
7/25/2015
7/26/2015
7/27/2015
7/28/2015
7/29/2015
7/30/2015
7/31/2015
8/1/2015
8/2/2015 0.00
8/3/2015 0.00
8/4/2015 0.00
8/5/2015 0.00
8/6/2015 0.03
8/7/2015 0.00
8/8/2015 T
8/9/2015 0.07
8/10/2015 T
8/11/2015 0.06
8/12/2015 0.09
8/13/2015 0.05
8/14/2015 0.00
8/15/2015 0.04
8/16/2015 0.00
8/17/2015 0.00
8/18/2015 0.00
8/19/2015 0.00
8/20/2015 0.00
8/21/2015 0.00
8/22/2015 0.00
8/23/2015 0.00
8/24/2015 0.00
8/25/2015 0.00
8/26/2015 0.00
8/27/2015 T
8/28/2015 0.00
8/29/2015 0.00
8/30/2015 0.46
8/31/2015 0.01
9/1/2015 0.00
9/2/2015 0.00
9/3/2015 0.00
9/4/2015 0.10
9/5/2015 0.39
9/6/2015 0.10
9/7/2015 T
9/8/2015 0.00
9/9/2015 0.00
9/10/2015 0.00
9/11/2015 **
9/12/2015 **
9/13/2015 **
9/14/2015 **
9/15/2015 **
9/16/2015 **
9/17/2015 **
9/18/2015 **
9/19/2015 **
9/20/2015 **
9/21/2015 **
9/22/2015 **
9/23/2015 1.03
9/24/2015 0.00
9/25/2015 0.00
9/26/2015 0.00
9/27/2015 0.00
9/28/2015
9/29/2015
9/30/2015 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
8/2/2015 7:24 AM 0.00 0.0 M M M
8/3/2015 7:00 AM 0.00 0.0 M M M
8/4/2015 7:00 AM 0.00 0.0 M M M
8/5/2015 7:00 AM 0.00 0.0 M M M
8/6/2015 7:14 AM 0.03 M M M M
8/7/2015 7:00 AM 0.00 0.0 M M M
8/8/2015 7:00 AM T M M M M
8/9/2015 6:50 AM 0.07 M M M M
8/10/2015 7:30 AM T M M M M
8/11/2015 6:23 AM 0.06 M M M M
8/12/2015 7:03 AM 0.09 M M M M
8/13/2015 6:48 AM 0.05 M M M M Lo 51 this am, hi of 86, BP of 29.91 & falling -2 t-storms yesterday w/accumulations of 0.04 @ 7:35 am and 0.01" at 9:00 pm
8/14/2015 7:00 AM 0.00 0.0 M M M 59 for a lo, 83 for a hi, 60% hum, BP 29.95 and falling,dark clouds
8/15/2015 6:50 AM 0.04 M M M M Very smokey. Lo of 51 this am ,Hi of 85 yesterday 56% hum, BP of 29.93 & falling 2 periods of T-storms yesterday lasting 10 min ea at 2 p & 4 p
8/16/2015 7:06 AM 0.00 0.0 M M M Temp hi yesterday 77, Lo @ 7 am 42.5, 62 % RH,29.83 BP & falling- wind calm, smoke in air not as severe as yesterday
8/17/2015 7:45 AM 0.00 0.0 M M M Hi of 73 yesterday,Lo 43, 56% RH, 29.82 BP & falling, smokey haze, no wind clear skies
8/18/2015 7:22 AM 0.00 0.0 M M M Hi yesterday 68.8,lo of 41.2,61 % RH, 29.78 BP falling, wind calm, smokey haze
8/19/2015 7:00 AM 0.00 0.0 M M M 67.9 for a high temp yesterday, 38.2 for a low this am, 76 % RH, 29.80 BP and falling, smokey haze, wind calm
8/20/2015 7:00 AM 0.00 0.0 M M M Hi of 73.1 yesterday, lo of 38.1 this am, 64 % RH, 29.79 BP & falling, partly cloudy, smokey haze
8/21/2015 7:00 AM 0.00 0.0 M M M Hi of 79 yesterday,Lo of 44 this am, 47 % RH, 29.80 BP & falling, no wind, smokey haze
8/22/2015 7:00 AM 0.00 0.0 M M M Bare Lake Fire, located in West Pioneers, 9.5 miles NNW of this station,erupted approx 2-3 p on Aug 21, Pouring heavy smoke into the Grasshopper valley. Gusty winds yesterday,Hi temp of 77, low this am of 39 54% RH, 29.80 BP, calm wind, heavy smoke.
8/23/2015 7:00 AM 0.00 0.0 M M M Hi temp yesterday 67, lo this am is 35, 65 % RH, 29.80 BP steady, no wind, clear sky above a heavy smokey haze
8/24/2015 7:00 AM 0.00 0.0 M M M Hi temp yesterday 79, Lo this am 43.6, 46 % RH,29.80 BP,calm, clear skies, smokey haze
8/25/2015 7:00 AM 0.00 0.0 M M M Hi temp yesterday 84, Lo @ 7 am this morn 46, 28-40% RH,29.84 BP and falling, no wind, clear skies smoke haze much reduced
8/26/2015 7:00 AM 0.00 0.0 M M M Hi temp yesterday 82.6,Lo this am 50.8, 40% RH, 29.85 BP & falling, wind calm, smokey haze
8/27/2015 7:00 AM T M M M M a few rain drops yesterday afternoon, hi of 87, low this morn 53, 38-47% RH last 24 hrs, 29.91 BP & falling, wind calm, smokey haze filling the Grasshopper Valley from the Bear Lake fire, approx 9 miles from this station location
8/28/2015 7:00 AM 0.00 0.0 M M M Hi temp 8/27 of 82, Lo this am of 46, 39-60% RH, 29.83 BP and falling, wind calm, very smokey
8/29/2015 7:00 AM 0.00 0.0 M M M Hi 82 yesterday, lo this am 54, 37-48% RH, 29.86 BP & Falling, calm wind, believe the sky to be partly cloudy above the smoky haze.
8/30/2015 7:00 AM 0.46 M M M M T-storm moved into the area @2:50 p yesterday that provided not only sufficient lightning,but much needed moisture of 0.20" and appeared to drop it on the Bear Lake Fire. Thru the nite another 0.26" fell. Grasshopper Valley is clear of smoke haze. Yesterdays hi temp 79, this am was 49.8,44-78% RH, 29.83 BP,winds yesterday were from the south @ 15-25 mph. wind calm presently
8/31/2015 7:00 AM 0.01 M M M M the rainfall of Saturday nite managed to suppress the Bear Lake Fire. Skies are mostly clear w/o smoke or haze. Yesterdays Hi temp of 73, Lo this am 39, 71% RH, 29.79 BP & falling
9/1/2015 7:00 AM 0.00 0.0 M M M Beautiful day yesterday,no smoke, Hi of 73, lo of 42 this morn, 63 % RH, 29.80 BP, wind calm, some clouds
9/2/2015 7:00 AM 0.00 0.0 M M M Hi temp yesterday 79,Lo this am 42, 51% RH, 29.84 BP, no wind, partly cloudy, no smoke
9/3/2015 7:00 AM 0.00 0.0 M M M Gusty winds yesterday caused the Bear Lake Fire to erupt after 2 days of rest. Hi temp was 80, Lo this am 44, 52% RH, 29.79 BP, winds calm at the moment, cloudy w/smoke haze
9/4/2015 7:00 AM 0.10 M M M M Hi temp 66, lo this am 43, 76% RH, 29.78 BP, no wind today but 40 mph winds yesterday afternoon, 100% cloud cover
9/5/2015 7:00 AM 0.39 M M M M There were 4 periods of T-storms yesterday, and last nite Heavy rain & hail @ 6:30 p, 3 separate t-storms from 2 a to 4 a. Yesterday Hi of 51.7 and morning Lo of 41. 98% RH, 29.76 BP & falling, slight wind, dark clouds and raining presently.
9/6/2015 7:00 AM 0.10 M M M M light Rain until 11 am yesterday, Hi temp of 57, Lo temp of 32 this am, 74% RH, 29.76 BP, mostly cloudy, wind calm The East Pioneers saw a dusting of snow yesterday
9/7/2015 7:00 AM T M M M M Hi temp 59, Lo of 31 this am,70% RH, 29.78 BP, wind calm,clear sky, no smoke
9/8/2015 7:00 AM 0.00 0.0 M M M Hi temp 62, Lo this am 33, 73% RH, 29.77 BP falling, clear skies, wind calm
9/9/2015 7:00 AM 0.00 0.0 M M M Hi temp yesterday of 66, Lo temp 40, 65% RH, 29.81 BP, wind calm, clear skies
9/10/2015 6:25 AM 0.00 0.0 M M M Hi temp yesterday 74,Lo this am 41.2, 61% RH, 29.76 BP & falling, no wind, clear skies
9/24/2015 7:55 AM 0.00 0.0 M M M Lo of 41, 63% RH, 29.96 BP rising, no wind, hi scattered clouds
9/25/2015 7:00 AM 0.00 0.0 M M M Hi temp 77, lo 41.5. 58% RH, 29.92 BP falling, no wind, clear skies
9/26/2015 7:45 AM 0.00 0.0 M M M Hi temp yesterday 81, low 42.5, 36-51% RH, 29.95 BP, no wind, mostly cloudy
9/27/2015 7:00 AM 0.00 0.0 M M M Hi temp 78, Lo of 44, 43-60% RH, 29.92 BP, now wind, some clouds
9/30/2015 7:00 AM 0.00 0.0 M M M Hi temp yesterday 71, Lo this am 37, 56% RH, 30.00 BP and steady, clear skies, no wind.



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
9/11/2015 9/23/2015 6:30 PM 13 1.03 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