Station Overview Station Location
Station Number IL-DP-78 Latitude 41.741838
Station Name Naperville 2.4 SE Longitude -88.116204
County Du Page Elevation (ft) 709



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 3.00 1.85 36 1.24 5 0.61 31 7 4 0 0.0 0 0
Nov 14 3.26 1.13 31 0.05 2 1.08 29 5 1 0 0.0 0 0
Dec 14 2.32 0.97 31 0.23 4 0.74 27 5 2 0 0.0 0 0
Jan 15 1.81 1.16 31 1.16 10 0.00 21 8 5 0 9.5 5 0
Feb 15 1.77 1.45 28 0.26 4 1.19 24 5 2 0 2.5 2 3
March 15 2.41 0.80 34 0.80 2 0.00 32 4 2 0 2.0 1 0
April 15 3.57 3.10 30 3.10 7 0.00 23 6 5 0 0.0 0 0
May 15 4.09 1.76 30 1.18 8 0.58 22 6 5 0 0.0 0 0
June 15 4.20 3.51 30 1.18 8 2.33 22 7 5 0 0.0 0 0
July 15 4.03 1.82 32 0.50 8 1.32 24 5 2 0 0.0 0 0
Aug 15 4.24 1.65 36 1.65 11 0.00 25 8 6 0 0.0 0 0
Sept 15 3.29 2.07 30 1.65 25 0.42 5 2 4 0 0.0 0 0
Water Year Totals: 37.99" 21.27" 379 days 13.00" 94 8.27" 285 days 68 43 days 0 days 14.0" 8 days 3 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 0.00
10/3/2014 0.44
10/4/2014 0.02
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 0.00
10/14/2014 0.76
10/15/2014 **
10/16/2014 0.61
10/17/2014 0.00
10/18/2014 0.02
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 0.00
10/31/2014 **
11/1/2014 **
11/2/2014 **
11/3/2014 **
11/4/2014 **
11/5/2014 **
11/6/2014 **
11/7/2014 0.00
11/8/2014 **
11/9/2014 **
11/10/2014 0.00
11/11/2014 0.00
11/12/2014 0.05
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 0.08
11/23/2014 **
11/24/2014 1.00
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 0.00
12/4/2014 **
12/5/2014 0.00
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 0.00
12/16/2014 0.22
12/17/2014 **
12/18/2014 **
12/19/2014 **
12/20/2014 **
12/21/2014 **
12/22/2014 **
12/23/2014 0.12
12/24/2014 **
12/25/2014 **
12/26/2014 0.62
12/27/2014 0.01
12/28/2014 0.00
12/29/2014 0.00
12/30/2014 **
12/31/2014 **
Day of YearDaily PrcpMultiday Prcp
1/1/2015 **
1/2/2015 0.00
1/3/2015 0.66
1/4/2015
1/5/2015 M
1/6/2015 0.18
1/7/2015 0.00
1/8/2015 0.00
1/9/2015
1/10/2015 **
1/11/2015 0.00
1/12/2015 0.14
1/13/2015 0.04
1/14/2015 0.00
1/15/2015 0.00
1/16/2015 0.00
1/17/2015 **
1/18/2015 **
1/19/2015 **
1/20/2015 **
1/21/2015 **
1/22/2015 **
1/23/2015 0.00
1/24/2015 **
1/25/2015 0.00
1/26/2015 0.14
1/27/2015 **
1/28/2015 **
1/29/2015 0.00
1/30/2015 **
1/31/2015 0.00
2/1/2015 **
2/2/2015 1.19
2/3/2015 0.00
2/4/2015 0.08
2/5/2015 **
2/6/2015 0.00
2/7/2015 **
2/8/2015 **
2/9/2015 **
2/10/2015 0.00
2/11/2015 **
2/12/2015 **
2/13/2015 **
2/14/2015 **
2/15/2015 **
2/16/2015 0.00
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 0.00
2/26/2015 0.18
2/27/2015 0.00
2/28/2015 **
3/1/2015 **
3/2/2015 0.00
3/3/2015 0.10
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 0.00
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 0.00
3/28/2015 0.70
3/29/2015 **
3/30/2015 **
3/31/2015 **
Day of YearDaily PrcpMultiday Prcp
4/1/2015 0.00
4/2/2015 0.26
4/3/2015 **
4/4/2015 0.00
4/5/2015 **
4/6/2015 **
4/7/2015 **
4/8/2015 0.00
4/9/2015 1.37
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 0.00
4/19/2015 0.55
4/20/2015 0.00
4/21/2015 0.37
4/22/2015 **
4/23/2015 **
4/24/2015 **
4/25/2015 0.00
4/26/2015 0.55
4/27/2015 0.00
4/28/2015 **
4/29/2015 **
4/30/2015 0.00
5/1/2015 **
5/2/2015 **
5/3/2015 0.00
5/4/2015
5/5/2015 **
5/6/2015 **
5/7/2015 0.00
5/8/2015 0.00
5/9/2015 0.58
5/10/2015 0.07
5/11/2015 **
5/12/2015 **
5/13/2015 **
5/14/2015 0.00
5/15/2015 0.18
5/16/2015 0.00
5/17/2015 0.10
5/18/2015 **
5/19/2015 **
5/20/2015 **
5/21/2015 **
5/22/2015 **
5/23/2015 **
5/24/2015 0.00
5/25/2015 0.25
5/26/2015 **
5/27/2015 **
5/28/2015 0.34
5/29/2015 0.00
5/30/2015 **
5/31/2015 0.24
6/1/2015 **
6/2/2015 0.00
6/3/2015 **
6/4/2015 0.00
6/5/2015 **
6/6/2015 **
6/7/2015 0.00
6/8/2015 0.26
6/9/2015 0.00
6/10/2015 **
6/11/2015 0.00
6/12/2015 **
6/13/2015 **
6/14/2015 **
6/15/2015 **
6/16/2015 **
6/17/2015 **
6/18/2015 **
6/19/2015 1.80
6/20/2015 **
6/21/2015 **
6/22/2015 0.53
6/23/2015 **
6/24/2015 0.00
6/25/2015 0.20
6/26/2015 0.05
6/27/2015 0.20
6/28/2015 0.00
6/29/2015 0.00
6/30/2015 0.47
Day of YearDaily PrcpMultiday Prcp
7/1/2015 **
7/2/2015 0.00
7/3/2015 **
7/4/2015 **
7/5/2015 **
7/6/2015 0.00
7/7/2015 0.47
7/8/2015 0.00
7/9/2015 0.03
7/10/2015 0.00
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 1.32
7/20/2015 0.00
7/21/2015 0.00
7/22/2015 0.00
7/23/2015 0.00
7/24/2015 **
7/25/2015 **
7/26/2015 **
7/27/2015 **
7/28/2015 **
7/29/2015 0.00
7/30/2015 **
7/31/2015 **
8/1/2015 **
8/2/2015 0.00
8/3/2015 0.33
8/4/2015 **
8/5/2015 **
8/6/2015 **
8/7/2015 0.00
8/8/2015 **
8/9/2015 **
8/10/2015 0.00
8/11/2015 0.03
8/12/2015 **
8/13/2015 0.00
8/14/2015 0.14
8/15/2015 **
8/16/2015 **
8/17/2015 0.00
8/18/2015 0.34
8/19/2015 0.38
8/20/2015 0.00
8/21/2015 0.00
8/22/2015 **
8/23/2015 **
8/24/2015 **
8/25/2015 **
8/26/2015 **
8/27/2015 0.00
8/28/2015 0.00
8/29/2015 0.00
8/30/2015 0.43
8/31/2015 0.00
9/1/2015 0.00
9/2/2015 0.00
9/3/2015 0.00
9/4/2015 0.00
9/5/2015 0.00
9/6/2015 0.00
9/7/2015 0.00
9/8/2015 0.10
9/9/2015 0.28
9/10/2015 0.00
9/11/2015 **
9/12/2015 0.42
9/13/2015 0.00
9/14/2015 0.00
9/15/2015 0.00
9/16/2015 0.00
9/17/2015 0.00
9/18/2015 0.50
9/19/2015 0.77
9/20/2015 0.00
9/21/2015 0.00
9/22/2015 0.00
9/23/2015 0.00
9/24/2015 0.00
9/25/2015 0.00
9/26/2015 **
9/27/2015 **
9/28/2015 0.00
9/29/2015 0.00
9/30/2015 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/3/2014 7:00 AM 0.44 M M M M
10/4/2014 7:00 AM 0.02 M M M M
10/14/2014 7:00 AM 0.76 M M M M
10/17/2014 7:00 AM 0.00 0.0 M M M
10/18/2014 7:00 AM 0.02 M M M M
11/11/2014 7:00 AM 0.00 0.0 M M M
11/12/2014 7:00 AM 0.05 0.0 M M M
12/16/2014 7:00 AM 0.22 M M M M
12/27/2014 7:00 AM 0.01 0.0 M M M
12/28/2014 7:00 AM 0.00 0.0 M M M
12/29/2014 7:00 AM 0.00 0.0 M M M
1/3/2015 7:00 AM 0.66 0.5 M M M
1/5/2015 7:00 AM M M M M M
1/6/2015 7:00 AM 0.18 3.5 M M M
1/7/2015 7:00 AM 0.00 0.0 M M M
1/8/2015 7:00 AM 0.00 0.0 M M M
1/12/2015 7:00 AM 0.14 2.5 M M M
1/13/2015 7:00 AM 0.04 2.0 M M M
1/14/2015 7:00 AM 0.00 0.0 M M M
1/15/2015 7:00 AM 0.00 0.0 M M M
1/16/2015 7:00 AM 0.00 0.0 0.12 M M
1/26/2015 7:00 AM 0.14 1.0 M M M
2/3/2015 7:00 AM 0.00 0.0 0.00 18.0 1.96
2/4/2015 7:00 AM 0.08 0.5 M M M
2/26/2015 7:00 AM 0.18 2.0 M 7.0 M
2/27/2015 7:00 AM 0.00 0.0 M 7.0 M
3/3/2015 7:00 AM 0.10 M M M M
3/28/2015 7:00 AM 0.70 2.0 M M M
4/2/2015 7:00 AM 0.26 M M M M
4/9/2015 7:00 AM 1.37 M M M M
4/19/2015 7:00 AM 0.55 M M M M
4/20/2015 7:00 AM 0.00 0.0 M M M
4/21/2015 7:00 AM 0.37 M M M M
4/26/2015 7:00 AM 0.55 0.0 M M M
4/27/2015 7:00 AM 0.00 0.0 M M M
5/8/2015 7:00 AM 0.00 0.0 M M M
5/9/2015 7:00 AM 0.58 M M M M
5/10/2015 7:00 AM 0.07 M M M M
5/15/2015 7:00 AM 0.18 M M M M
5/16/2015 7:00 AM 0.00 0.0 M M M
5/17/2015 7:00 AM 0.10 M M M M
5/25/2015 7:00 AM 0.25 M M M M
5/29/2015 7:00 AM 0.00 0.0 M M M
6/8/2015 7:00 AM 0.26 0.0 M M M
6/9/2015 7:00 AM 0.00 0.0 M M M
6/25/2015 7:00 AM 0.20 M M M M
6/26/2015 7:00 AM 0.05 M M M M
6/27/2015 7:00 AM 0.20 M M M M
6/28/2015 7:00 AM 0.00 0.0 M M M
6/29/2015 7:00 AM 0.00 0.0 M M M
6/30/2015 7:00 AM 0.47 M M M M
7/7/2015 7:00 AM 0.47 M M M M
7/8/2015 7:00 AM 0.00 0.0 M M M
7/9/2015 7:00 AM 0.03 M M M M
7/10/2015 7:00 AM 0.00 0.0 M M M
7/20/2015 7:00 AM 0.00 0.0 M M M
7/21/2015 7:00 AM 0.00 0.0 M M M
7/22/2015 7:00 AM 0.00 0.0 M M M
7/23/2015 7:00 AM 0.00 0.0 M M M
8/3/2015 7:00 AM 0.33 M M M M
8/11/2015 7:00 AM 0.03 M M M M
8/14/2015 7:00 AM 0.14 M M M M
8/18/2015 7:00 AM 0.34 M M M M
8/19/2015 7:00 AM 0.38 M M M M
8/20/2015 7:00 AM 0.00 0.0 M M M
8/21/2015 7:00 AM 0.00 0.0 M M M
8/28/2015 7:00 AM 0.00 0.0 M M M
8/29/2015 7:00 AM 0.00 0.0 M M M
8/30/2015 7:00 AM 0.43 M M M M
8/31/2015 7:00 AM 0.00 0.0 M M M
9/1/2015 7:00 AM 0.00 0.0 M M M
9/2/2015 7:00 AM 0.00 0.0 M M M
9/3/2015 7:00 AM 0.00 0.0 M M M
9/4/2015 7:00 AM 0.00 0.0 M M M
9/5/2015 7:00 AM 0.00 0.0 M M M
9/6/2015 7:00 AM 0.00 0.0 M M M
9/7/2015 7:00 AM 0.00 0.0 M M M
9/8/2015 7:00 AM 0.10 M M M M
9/9/2015 7:00 AM 0.28 M M M M
9/10/2015 7:00 AM 0.00 0.0 M M M
9/13/2015 7:00 AM 0.00 0.0 M M M
9/14/2015 7:00 AM 0.00 0.0 M M M
9/15/2015 7:00 AM 0.00 0.0 M M M
9/16/2015 7:00 AM 0.00 0.0 M M M
9/17/2015 7:00 AM 0.00 0.0 M M M
9/18/2015 7:00 AM 0.50 M M M M
9/19/2015 7:00 AM 0.77 M M M M
9/20/2015 7:00 AM 0.00 0.0 M M M
9/21/2015 7:00 AM 0.00 0.0 M M M
9/22/2015 7:00 AM 0.00 0.0 M M M
9/23/2015 7:00 AM 0.00 0.0 M M M
9/24/2015 7:00 AM 0.00 0.0 M M M
9/25/2015 7:00 AM 0.00 0.0 M M M
9/29/2015 7:00 AM 0.00 0.0 M M M
9/30/2015 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
9/26/2014 10/02/2014 12:00 AM 7 0.00 M M
10/5/2014 10/06/2014 12:00 AM 2 0.00 M M
10/6/2014 10/13/2014 12:00 AM 8 0.00 M M
10/15/2014 10/16/2014 12:00 AM 2 0.61 M M
10/19/2014 10/20/2014 12:00 AM 2 0.00 M M
10/20/2014 10/23/2014 12:00 AM 4 0.00 M M
10/21/2014 10/30/2014 12:00 AM 10 0.00 M M
10/31/2014 11/03/2014 12:00 AM 4 0.00 M M
11/3/2014 11/07/2014 12:00 AM 5 0.00 M M
11/8/2014 11/10/2014 12:00 AM 3 0.00 M M
11/13/2014 11/22/2014 12:00 AM 10 0.08 M M
11/23/2014 11/24/2014 12:00 AM 2 1.00 M M Just a trace of snow accumulated on Monday (11/24) as rain changed over to snow by mid morning on 11/24. No additional snow accumulated.
11/25/2014 12/03/2014 12:00 AM 9 0.00 M M
12/4/2014 12/05/2014 12:00 AM 2 0.00 M M
12/6/2014 12/15/2014 12:00 AM 10 0.00 M M
12/17/2014 12/23/2014 7:00 AM 7 0.12 M M
12/24/2014 12/26/2014 7:00 AM 3 0.62 M M
12/30/2014 1/02/2015 12:00 AM 4 0.00 M M
1/10/2015 1/11/2015 12:00 AM 2 0.00 M M
1/17/2015 1/18/2015 12:00 AM 2 0.00 M M
1/18/2015 1/20/2015 12:00 AM 3 0.00 M M
1/19/2015 1/23/2015 12:00 AM 5 0.00 M M
1/24/2015 1/25/2015 12:00 AM 2 0.00 M M
1/27/2015 1/29/2015 12:00 AM 3 0.00 M M
1/30/2015 1/31/2015 12:00 AM 2 0.00 M M
2/1/2015 2/02/2015 12:00 AM 2 1.19 18.0 0.57 Snow began at 2030 hours on Saturday night. Snow accumulation was 9 inches by Sunday AM at 1030 hours. 6.5 inches by 1930 hours Sunday night. An additional 2.5 inches by 0930 hours on Monday AM. Snow was initially very wet (high moisture content) and heavy, but then light and fluffy by Sunday night as temperatures dropped. Total snow depth was 18 inches. Windy period during Sunday afternoon and evening with less than 1/4 mile visibility.
2/5/2015 2/06/2015 12:00 AM 2 0.00 M M
2/7/2015 2/10/2015 12:00 AM 4 0.00 10.0 0.18
2/11/2015 2/16/2015 12:00 AM 6 0.00 6.0 M
2/17/2015 2/25/2015 12:00 AM 9 0.00 5.0 M
2/28/2015 3/02/2015 12:00 AM 3 0.00 6.0 1.65
3/4/2015 3/07/2015 12:00 AM 4 0.00 M M
3/5/2015 3/16/2015 12:00 AM 12 0.00 M M
3/17/2015 3/27/2015 12:00 AM 11 0.00 M M
3/29/2015 4/01/2015 12:00 AM 4 0.00 M M
4/3/2015 4/04/2015 12:00 AM 2 0.00 M M
4/5/2015 4/08/2015 12:00 AM 4 0.00 M M
4/10/2015 4/18/2015 12:00 AM 9 0.00 M M
4/22/2015 4/25/2015 12:00 AM 4 0.00 M M
4/28/2015 4/30/2015 12:00 AM 3 0.00 M M
5/1/2015 5/03/2015 12:00 AM 3 0.00 M M
5/5/2015 5/07/2015 12:00 AM 3 0.00 M M
5/11/2015 5/14/2015 12:00 AM 4 0.00 M M
5/18/2015 5/24/2015 12:00 AM 7 0.00 M M
5/26/2015 5/28/2015 12:00 AM 3 0.34 M M
5/30/2015 5/31/2015 12:00 AM 2 0.24 M M
6/1/2015 6/02/2015 12:00 AM 2 0.00 M M
6/3/2015 6/04/2015 12:00 AM 2 0.00 M M
6/5/2015 6/07/2015 12:00 AM 3 0.00 M M
6/10/2015 6/11/2015 12:00 AM 2 0.00 M M
6/12/2015 6/19/2015 12:00 AM 8 1.80 M M
6/20/2015 6/22/2015 12:00 AM 3 0.53 M M
6/23/2015 6/24/2015 12:00 AM 2 0.00 M M
7/1/2015 7/02/2015 12:00 AM 2 0.00 M M
7/3/2015 7/06/2015 12:00 AM 4 0.00 M M
7/11/2015 7/19/2015 12:00 AM 9 1.32 M M
7/24/2015 7/29/2015 12:00 AM 6 0.00 M M
7/30/2015 7/31/2015 12:00 AM 2 0.00 M M
7/31/2015 8/02/2015 12:00 AM 3 0.00 M M
8/4/2015 8/05/2015 12:00 AM 2 0.00 M M
8/5/2015 8/07/2015 12:00 AM 3 0.00 M M
8/8/2015 8/10/2015 12:00 AM 3 0.00 M M
8/12/2015 8/13/2015 12:00 AM 2 0.00 M M
8/15/2015 8/17/2015 12:00 AM 3 0.00 M M
8/22/2015 8/26/2015 12:00 AM 5 0.00 M M
8/23/2015 8/27/2015 12:00 AM 5 0.00 M M
9/11/2015 9/12/2015 12:00 AM 2 0.42 M M
9/26/2015 9/28/2015 12:00 AM 3 0.00 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