Station Overview Station Location
Station Number CAN-ON-170 Latitude 48.453508
Station Name Thunder Bay 5.2 NNE Longitude -89.223948
County Ontario Elevation (ft) 730



Month 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 15 1.87 23 1.87 23 0.00 0 0 8 3 0.0 0 0
Nov 15 2.64 23 2.64 23 0.00 0 0 14 2 5.2 6 11
Dec 15 3.49 30 3.49 30 0.00 0 0 10 5 7.7 6 20
Jan 16 1.63 22 1.63 22 0.00 0 0 9 5 22.5 9 22
Feb 16 1.70 27 1.70 27 0.00 0 0 12 3 18.0 11 27
March 16 1.38 7 1.38 7 0.00 0 0 4 2 14.1 4 7
April 16 0.65 5 0.65 5 0.00 0 0 4 1 8.2 4 5
May 16 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 16 3.15 1 3.15 1 0.00 0 0 1 0 0.0 0 0
July 16 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 16 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Sept 16 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 16.51" 138 days 16.51" 138 0.00" 0 days 0 62 days 21 days 75.7" 40 days 92 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
10/1/2015 0.00
10/2/2015 0.00
10/3/2015 0.00
10/4/2015 0.00
10/5/2015 0.00
10/6/2015 0.00
10/7/2015 0.00
10/8/2015 0.06
10/9/2015 0.38
10/10/2015 0.00
10/11/2015 0.00
10/12/2015 0.00
10/13/2015 0.00
10/14/2015 0.00
10/15/2015 T
10/16/2015
10/17/2015
10/18/2015
10/19/2015
10/20/2015
10/21/2015 0.04
10/22/2015 0.15
10/23/2015
10/24/2015 0.39
10/25/2015 0.02
10/26/2015
10/27/2015
10/28/2015 0.06
10/29/2015 0.77
10/30/2015 T
10/31/2015 T
11/1/2015 0.44
11/2/2015 T
11/3/2015
11/4/2015
11/5/2015 0.02
11/6/2015
11/7/2015 0.04
11/8/2015
11/9/2015
11/10/2015
11/11/2015 0.02
11/12/2015 0.09
11/13/2015 0.47
11/14/2015 0.00
11/15/2015 0.00
11/16/2015 0.00
11/17/2015 0.24
11/18/2015 0.57
11/19/2015 0.55
11/20/2015 0.02
11/21/2015 T
11/22/2015
11/23/2015 0.13
11/24/2015 0.01
11/25/2015 0.00
11/26/2015 0.01
11/27/2015 0.03
11/28/2015 0.00
11/29/2015 0.00
11/30/2015 0.00
12/1/2015
12/2/2015 0.45
12/3/2015 T
12/4/2015 0.00
12/5/2015 0.00
12/6/2015 0.00
12/7/2015 0.00
12/8/2015 0.00
12/9/2015 0.00
12/10/2015 0.07
12/11/2015 0.21
12/12/2015 0.03
12/13/2015 0.00
12/14/2015 0.33
12/15/2015 0.00
12/16/2015 0.06
12/17/2015 1.40
12/18/2015 0.03
12/19/2015 0.00
12/20/2015 0.00
12/21/2015 0.00
12/22/2015 0.00
12/23/2015 0.00
12/24/2015 0.85
12/25/2015 T
12/26/2015 T
12/27/2015 0.06
12/28/2015 T
12/29/2015 T
12/30/2015 0.00
12/31/2015 0.00
Day of YearDaily PrcpMultiday Prcp
1/1/2016 T
1/2/2016 T
1/3/2016 0.00
1/4/2016 T
1/5/2016 0.02
1/6/2016 0.00
1/7/2016 T
1/8/2016 0.17
1/9/2016 0.14
1/10/2016 0.00
1/11/2016 0.00
1/12/2016 T
1/13/2016 0.00
1/14/2016
1/15/2016 0.35
1/16/2016
1/17/2016
1/18/2016
1/19/2016
1/20/2016
1/21/2016 0.06
1/22/2016
1/23/2016
1/24/2016 0.05
1/25/2016
1/26/2016 0.11
1/27/2016 0.00
1/28/2016 0.34
1/29/2016 0.00
1/30/2016 0.39
1/31/2016 0.00
2/1/2016 0.00
2/2/2016 T
2/3/2016 0.06
2/4/2016 0.00
2/5/2016 0.01
2/6/2016 0.02
2/7/2016 0.51
2/8/2016 0.18
2/9/2016 0.11
2/10/2016 0.00
2/11/2016 0.00
2/12/2016 0.00
2/13/2016 0.00
2/14/2016 T
2/15/2016 0.06
2/16/2016 0.00
2/17/2016 0.00
2/18/2016 0.00
2/19/2016 0.34
2/20/2016 0.13
2/21/2016 T
2/22/2016
2/23/2016 0.03
2/24/2016 0.06
2/25/2016 0.00
2/26/2016 0.00
2/27/2016 0.00
2/28/2016 0.19
2/29/2016
3/1/2016
3/2/2016
3/3/2016
3/4/2016
3/5/2016
3/6/2016
3/7/2016
3/8/2016
3/9/2016
3/10/2016
3/11/2016
3/12/2016
3/13/2016
3/14/2016
3/15/2016 T
3/16/2016 T
3/17/2016 1.12
3/18/2016 0.15
3/19/2016
3/20/2016
3/21/2016
3/22/2016
3/23/2016
3/24/2016
3/25/2016
3/26/2016 0.09
3/27/2016 0.02
3/28/2016 0.00
3/29/2016
3/30/2016
3/31/2016
Day of YearDaily PrcpMultiday Prcp
4/1/2016 0.03
4/2/2016 0.11
4/3/2016 T
4/4/2016
4/5/2016
4/6/2016 0.42
4/7/2016 0.09
4/8/2016
4/9/2016
4/10/2016
4/11/2016
4/12/2016
4/13/2016
4/14/2016
4/15/2016
4/16/2016
4/17/2016
4/18/2016
4/19/2016
4/20/2016
4/21/2016
4/22/2016
4/23/2016
4/24/2016
4/25/2016
4/26/2016
4/27/2016
4/28/2016
4/29/2016
4/30/2016
5/1/2016
5/2/2016
5/3/2016
5/4/2016
5/5/2016
5/6/2016
5/7/2016
5/8/2016
5/9/2016
5/10/2016
5/11/2016
5/12/2016
5/13/2016
5/14/2016
5/15/2016
5/16/2016
5/17/2016
5/18/2016
5/19/2016
5/20/2016
5/21/2016
5/22/2016
5/23/2016
5/24/2016
5/25/2016
5/26/2016
5/27/2016
5/28/2016
5/29/2016
5/30/2016
5/31/2016
6/1/2016
6/2/2016
6/3/2016
6/4/2016
6/5/2016
6/6/2016
6/7/2016
6/8/2016
6/9/2016
6/10/2016
6/11/2016
6/12/2016
6/13/2016
6/14/2016
6/15/2016
6/16/2016
6/17/2016
6/18/2016
6/19/2016
6/20/2016
6/21/2016
6/22/2016
6/23/2016
6/24/2016
6/25/2016
6/26/2016 3.15
6/27/2016
6/28/2016
6/29/2016
6/30/2016
Day of YearDaily PrcpMultiday Prcp
7/1/2016
7/2/2016
7/3/2016
7/4/2016
7/5/2016
7/6/2016
7/7/2016
7/8/2016
7/9/2016
7/10/2016
7/11/2016
7/12/2016
7/13/2016
7/14/2016
7/15/2016
7/16/2016
7/17/2016
7/18/2016
7/19/2016
7/20/2016
7/21/2016
7/22/2016
7/23/2016
7/24/2016
7/25/2016
7/26/2016
7/27/2016
7/28/2016
7/29/2016
7/30/2016
7/31/2016
8/1/2016
8/2/2016
8/3/2016
8/4/2016
8/5/2016
8/6/2016
8/7/2016
8/8/2016
8/9/2016
8/10/2016
8/11/2016
8/12/2016
8/13/2016
8/14/2016
8/15/2016
8/16/2016
8/17/2016
8/18/2016
8/19/2016
8/20/2016
8/21/2016
8/22/2016
8/23/2016
8/24/2016
8/25/2016
8/26/2016
8/27/2016
8/28/2016
8/29/2016
8/30/2016
8/31/2016
9/1/2016
9/2/2016
9/3/2016
9/4/2016
9/5/2016
9/6/2016
9/7/2016
9/8/2016
9/9/2016
9/10/2016
9/11/2016
9/12/2016
9/13/2016
9/14/2016
9/15/2016
9/16/2016
9/17/2016
9/18/2016
9/19/2016
9/20/2016
9/21/2016
9/22/2016
9/23/2016
9/24/2016
9/25/2016
9/26/2016
9/27/2016
9/28/2016
9/29/2016
9/30/2016



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/2/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/3/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/4/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/5/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/6/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/7/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/8/2015 8:00 AM 0.06 0.0 0.00 0.0 0.00
10/9/2015 8:00 AM 0.38 0.0 0.00 0.0 0.00
10/10/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/11/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/12/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/13/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/14/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
10/15/2015 8:00 AM T 0.0 0.00 0.0 0.00 Spotty shower yesterday afternoon.
10/21/2015 8:00 AM 0.04 0.0 0.00 0.0 0.00 Rain began this morning.
10/22/2015 8:00 AM 0.15 0.0 0.00 0.0 0.00 Periods of light rain yesterday and overnight.
10/24/2015 8:00 AM 0.39 0.0 0.00 0.0 0.00 Rain yesterday and overnight.
10/25/2015 8:00 AM 0.02 0.0 0.00 T 0.00 Showers yesterday morning; brief freezing rain early this morning. Slick surfaces this morning.
10/28/2015 8:00 AM 0.06 0.0 0.00 0.0 0.00 Light rain began early this morning.
10/29/2015 7:00 AM 0.77 0.0 0.00 0.0 0.00 Rain yesterday and overnight.
10/30/2015 8:00 AM T 0.0 0.00 0.0 0.00
10/31/2015 8:00 AM T 0.0 0.00 0.0 0.00
11/1/2015 8:00 AM 0.44 0.0 0.00 0.0 0.00 Rain yesterday. Very poor conditions for trick-or-treating.
11/2/2015 8:00 AM T 0.0 0.00 0.0 0.00
11/5/2015 8:00 AM 0.02 0.0 0.00 0.0 0.00 Drizzle yesterday and overnight.
11/7/2015 8:00 AM 0.04 T 0.00 0.0 0.00 Snow showers and rain showers yesterday evening and overnight.
11/11/2015 8:00 AM 0.02 0.0 0.00 0.0 0.00
11/12/2015 8:00 AM 0.09 0.0 0.00 0.0 0.00 Light rain began overnight.
11/13/2015 8:00 AM 0.47 2.2 M 2.2 M Light rain yesterday turned to snow late in the afternoon and ended early this morning.
11/14/2015 8:00 AM 0.00 0.0 0.00 1.9 M
11/15/2015 8:00 AM 0.00 0.0 0.00 T M
11/16/2015 7:00 AM 0.00 0.0 0.00 T M
11/17/2015 8:00 AM 0.24 0.0 0.00 0.0 0.00 Showers yesterday and overnight.
11/18/2015 8:00 AM 0.57 0.0 0.00 0.0 0.00 Light rain yesterday and overnight.
11/19/2015 8:00 AM 0.55 0.0 0.00 0.0 0.00 Light rain yesterday.
11/20/2015 8:00 AM 0.02 0.4 M 0.4 M Periods of snow yesterday evening and overnight.
11/21/2015 8:00 AM T T M T M Flurries yesterday and overnight.
11/23/2015 8:00 AM 0.13 1.8 M 1.8 M Snow overnight.
11/24/2015 8:00 AM 0.01 0.4 M 1.6 M Snow continued yesterday morning. Some melting yesterday afternoon.
11/25/2015 8:00 AM 0.00 0.0 0.00 0.9 M
11/26/2015 8:00 AM 0.01 0.1 M 0.1 M Mist yesterday. Light snow started early this morning.
11/27/2015 8:00 AM 0.03 0.3 M 0.4 M Snow yesterday morning.
11/28/2015 8:00 AM 0.00 0.0 0.00 0.4 M
11/29/2015 8:00 AM 0.00 0.0 0.00 0.4 M
11/30/2015 8:00 AM 0.00 0.0 0.00 0.3 M
12/2/2015 8:00 AM 0.45 T M T M Light rain yesterday, mixed with snow overnight.
12/3/2015 8:00 AM T T M T M A flurry or two yesterday evening.
12/4/2015 8:00 AM 0.00 0.0 0.00 T M
12/5/2015 8:00 AM 0.00 0.0 0.00 T M
12/6/2015 8:00 AM 0.00 0.0 0.00 T M
12/7/2015 8:00 AM 0.00 0.0 0.00 T M
12/8/2015 8:00 AM 0.00 0.0 0.00 T M
12/9/2015 8:00 AM 0.00 0.0 0.00 0.0 0.00
12/10/2015 8:00 AM 0.07 0.0 0.00 0.0 0.00 Rain began this morning.
12/11/2015 8:00 AM 0.21 0.0 0.00 0.0 0.00 Light rain yesterday and overnight.
12/12/2015 8:00 AM 0.03 0.2 M 0.2 M Showers yesterday morning. Light snow overnight.
12/13/2015 8:00 AM 0.00 0.0 0.00 0.2 M
12/14/2015 8:00 AM 0.33 2.4 M 2.4 M Very wet snow yesterday. Began as a mix of rain and snow and switched over after about 2 hours.
12/15/2015 8:00 AM 0.00 0.0 0.00 2.4 M
12/16/2015 8:00 AM 0.06 0.4 M 2.4 M Wet snow began overnight.
12/17/2015 8:00 AM 1.40 3.6 M 4.7 M Heavy, wet snow yesterday. Mixed with rain briefly in the morning and for a couple hours in the evening. Turned to flurries overnight.
12/18/2015 8:00 AM 0.03 0.4 M 4.8 M
12/19/2015 8:00 AM 0.00 0.0 0.00 4.8 M
12/20/2015 8:00 AM 0.00 0.0 0.00 4.8 M
12/21/2015 8:00 AM 0.00 0.0 0.00 4.6 M
12/22/2015 8:00 AM 0.00 0.0 0.00 4.6 M
12/23/2015 8:00 AM 0.00 0.0 0.00 3.9 M Some melting overnight as temperatures rose above zero.
12/24/2015 8:00 AM 0.85 T M 3.6 M Rain mixed with snow yesterday. Flurries overnight. Very messy. Still considerable snow on the ground considering how much rain fell.
12/25/2015 8:00 AM T T 0.00 3.6 M Some light flurries yesterday.
12/26/2015 8:00 AM T T M 3.6 M Flurries yesterday. "Sun snow showers"
12/27/2015 8:00 AM 0.06 0.7 M 4.0 M Periods of light snow yesterday.
12/28/2015 8:00 AM T T M 4.0 M A flurry or two yesterday.
12/29/2015 8:00 AM T T M 4.1 M Brief light snow yesterday evening.
12/30/2015 8:00 AM 0.00 0.0 0.00 4.1 M
12/31/2015 8:00 AM 0.00 0.0 0.00 3.7 M
1/1/2016 8:00 AM T T M 3.6 M Some light snow yesterday evening and overnight.
1/2/2016 8:00 AM T T M 3.6 M Some light snow yesterday.
1/3/2016 8:00 AM 0.00 0.0 0.00 3.6 M
1/4/2016 8:00 AM T T M 3.6 M Some light snow yesterday.
1/5/2016 8:00 AM 0.02 0.6 0.02 3.9 M Fluffy snow yesterday afternoon.
1/6/2016 8:00 AM 0.00 0.0 0.00 3.9 M
1/7/2016 8:00 AM T T M 3.9 M A flurry or two overnight.
1/8/2016 8:00 AM 0.17 2.0 0.17 5.2 M Periods of snow yesterday and overnight.
1/9/2016 8:00 AM 0.14 2.0 0.14 6.9 M Snow yesterday.
1/10/2016 8:00 AM 0.00 0.0 0.00 6.9 M
1/11/2016 8:00 AM 0.00 0.0 0.00 6.9 M
1/12/2016 8:00 AM T T M 6.9 M Periods of light snow yesterday evening.
1/13/2016 8:00 AM 0.00 0.0 0.00 6.8 M
1/15/2016 7:00 AM 0.35 6.6 M 8.7 M Flurries yesterday. Snow overnight, began at 7pm yesterday evening.
1/21/2016 8:00 AM 0.06 0.8 0.06 7.1 M Fluffy snow overnight.
1/24/2016 8:00 AM 0.05 0.8 0.05 7.5 M Light snow began yesterday evening and ended overnight.
1/26/2016 8:00 AM 0.11 1.1 0.11 7.6 M Freezing drizzle and flurries yesterday; light snow overnight.
1/27/2016 8:00 AM 0.00 0.0 0.00 7.6 M
1/28/2016 8:00 AM 0.34 4.6 0.34 10.2 M Snow yesterday afternoon and periods of snow overnight.
1/29/2016 8:00 AM 0.00 0.0 0.00 10.8 M Drifting snow yesterday.
1/30/2016 8:00 AM 0.39 4.0 0.39 13.1 M Flurries yesterday morning; light snow in the afternoon became heavier in the evening and ended overnight.
1/31/2016 8:00 AM 0.00 0.0 0.00 12.2 M Some melting yesterday.
2/1/2016 8:00 AM 0.00 0.0 0.00 12.2 M
2/2/2016 8:00 AM T T T 12.2 M
2/3/2016 8:00 AM 0.06 0.7 0.06 12.2 M
2/4/2016 8:00 AM 0.00 0.0 0.00 12.2 M
2/5/2016 8:00 AM 0.01 0.1 0.01 12.3 M A bit of light snow yesterday evening.
2/6/2016 8:00 AM 0.02 0.2 0.02 12.4 M Flurries yesterday evening.
2/7/2016 8:00 AM 0.51 4.9 0.51 16.1 M Snow overnight.
2/8/2016 8:00 AM 0.18 2.2 0.18 17.7 M Periods of snow yesterday and overnight.
2/9/2016 8:00 AM 0.11 0.8 0.11 18.2 M
2/10/2016 8:00 AM 0.00 0.0 0.00 17.5 M
2/11/2016 8:00 AM 0.00 0.0 0.00 17.5 M
2/12/2016 8:00 AM 0.00 0.0 0.00 16.9 M
2/13/2016 8:00 AM 0.00 0.0 0.00 16.9 M
2/14/2016 8:00 AM T T T 16.8 M A flurry or two overnight.
2/15/2016 8:00 AM 0.06 1.3 0.06 17.4 M Fluffy snow overnight.
2/16/2016 8:00 AM 0.00 0.0 0.00 17.4 M
2/17/2016 8:00 AM 0.00 0.0 0.00 16.2 M
2/18/2016 8:00 AM 0.00 0.0 0.00 16.2 M
2/19/2016 8:00 AM 0.34 3.7 0.34 19.1 M Wet snow overnight.
2/20/2016 8:00 AM 0.13 T T 16.0 M Showers at times mixed with flurries yesterday.
2/21/2016 8:00 AM T T T 15.6 M
2/23/2016 8:00 AM 0.03 0.3 0.03 15.7 M
2/24/2016 8:00 AM 0.06 0.9 0.06 16.1 M
2/25/2016 8:00 AM 0.00 0.0 0.00 14.3 M
2/26/2016 8:00 AM 0.00 0.0 0.00 13.1 M
2/27/2016 8:00 AM 0.00 0.0 0.00 12.6 M
2/28/2016 8:00 AM 0.19 2.9 0.19 14.6 M Fluffy snow overnight.
3/15/2016 8:00 AM T 0.0 0.00 4.3 M A brief shower or two yesterday morning.
3/16/2016 8:00 AM T T T 3.7 M
3/17/2016 7:00 AM 1.12 11.2 1.12 14.6 M Heavy snow (mixed with ice pellets at first) began around 11am yesterday and continued through the night. Light snow falling this morning.
3/18/2016 8:00 AM 0.15 1.6 0.15 15.9 M Snow persisted through yesterday afternoon.
3/26/2016 8:00 AM 0.09 1.0 0.09 6.4 M Light snow overnight.
3/27/2016 8:00 AM 0.02 0.3 0.02 5.2 M Snow ended late yesterday morning. All melted before the end of the day.
3/28/2016 8:00 AM 0.00 0.0 0.00 4.9 M
4/1/2016 8:00 AM 0.03 0.4 0.03 3.7 M Light snow began toward morning.
4/2/2016 8:00 AM 0.11 1.6 0.11 3.9 M A few hours of fairly heavy snow yesterday morning. Mostly melted in the afternoon.
4/3/2016 8:00 AM T T M 3.9 M Some flurries began falling early this morning.
4/6/2016 8:00 AM 0.42 4.9 0.42 5.9 M Wet, heavy snow overnight.
4/7/2016 8:00 AM 0.09 1.3 0.09 3.5 M Periods of snow and light snow continued through yesterday afternoon. There was considerable melting in the late afternoon.
6/26/2016 7:00 AM 3.15 0.0 0.00 0.0 0.00 Heavy thunderstorms yesterday morning and evening.



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes



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