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 10 3.00 0.70 33 0.00 0 0.70 33 2 0 0 0.0 0 0
Nov 10 3.26 0.20 30 0.00 0 0.20 30 1 0 0 0.0 0 0
Dec 10 2.32 2.47 31 0.42 2 2.05 29 5 2 0 3.8 2 1
Jan 11 1.81 1.19 30 0.00 0 1.19 30 3 0 0 0.0 0 0
Feb 11 1.77 8.06 30 1.56 3 6.50 27 4 1 0 18.0 1 2
March 11 2.41 2.81 42 0.00 0 2.81 42 2 0 0 0.0 0 0
April 11 3.57 2.85 31 0.00 0 2.85 31 3 0 0 0.0 0 0
May 11 4.09 0.10 32 0.00 1 0.10 31 2 0 0 0.0 0 0
June 11 4.20 6.31 31 0.10 2 6.21 29 7 1 0 0.0 0 0
July 11 4.03 2.89 33 0.00 0 2.89 33 4 0 0 0.0 0 0
Aug 11 4.24 1.14 31 0.00 0 1.14 31 2 0 0 0.0 0 0
Sept 11 3.29 2.92 29 0.00 0 2.92 29 3 0 0 0.0 0 0
Water Year Totals: 37.99" 31.64" 383 days 2.08" 8 29.56" 375 days 38 4 days 0 days 21.8" 3 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
10/1/2010 **
10/2/2010 **
10/3/2010 **
10/4/2010 **
10/5/2010 **
10/6/2010 **
10/7/2010 **
10/8/2010 **
10/9/2010 **
10/10/2010 **
10/11/2010 **
10/12/2010 **
10/13/2010 **
10/14/2010 **
10/15/2010 **
10/16/2010 **
10/17/2010 **
10/18/2010 **
10/19/2010 **
10/20/2010 **
10/21/2010 **
10/22/2010 **
10/23/2010 **
10/24/2010 **
10/25/2010 **
10/26/2010 **
10/27/2010 **
10/28/2010 **
10/29/2010 **
10/30/2010 **
10/31/2010 **
11/1/2010 0.20
11/2/2010 **
11/3/2010 **
11/4/2010 **
11/5/2010 **
11/6/2010 **
11/7/2010 **
11/8/2010 **
11/9/2010 **
11/10/2010 **
11/11/2010 **
11/12/2010 **
11/13/2010 **
11/14/2010 **
11/15/2010 **
11/16/2010 **
11/17/2010 **
11/18/2010 **
11/19/2010 **
11/20/2010 **
11/21/2010 **
11/22/2010 **
11/23/2010 **
11/24/2010 **
11/25/2010 **
11/26/2010 **
11/27/2010 **
11/28/2010 **
11/29/2010 **
11/30/2010 **
12/1/2010 **
12/2/2010 **
12/3/2010 0.65
12/4/2010 **
12/5/2010 **
12/6/2010 **
12/7/2010 1.00
12/8/2010 **
12/9/2010 **
12/10/2010 **
12/11/2010 **
12/12/2010 **
12/13/2010 **
12/14/2010 **
12/15/2010 **
12/16/2010 **
12/17/2010 **
12/18/2010 **
12/19/2010 **
12/20/2010 0.40
12/21/2010 **
12/22/2010 **
12/23/2010 **
12/24/2010 0.00
12/25/2010 0.22
12/26/2010 0.20
12/27/2010 **
12/28/2010 **
12/29/2010 0.00
12/30/2010 **
12/31/2010 **
Day of YearDaily PrcpMultiday Prcp
1/1/2011 0.85
1/2/2011 **
1/3/2011 **
1/4/2011 0.00
1/5/2011 **
1/6/2011 **
1/7/2011 **
1/8/2011 **
1/9/2011 **
1/10/2011 **
1/11/2011 **
1/12/2011 **
1/13/2011 **
1/14/2011 **
1/15/2011 **
1/16/2011 **
1/17/2011 **
1/18/2011 **
1/19/2011 **
1/20/2011 **
1/21/2011 **
1/22/2011 **
1/23/2011 **
1/24/2011 **
1/25/2011 **
1/26/2011 **
1/27/2011 **
1/28/2011 **
1/29/2011 0.34
1/30/2011
1/31/2011 **
2/1/2011 0.00 2.50
2/2/2011 1.56
2/3/2011 0.00 **
2/4/2011 **
2/5/2011 **
2/6/2011 2.00
2/7/2011 **
2/8/2011 **
2/9/2011 **
2/10/2011 **
2/11/2011 0.00
2/12/2011 **
2/13/2011 **
2/14/2011 **
2/15/2011 **
2/16/2011 **
2/17/2011 **
2/18/2011 2.00
2/19/2011 **
2/20/2011 **
2/21/2011 **
2/22/2011 **
2/23/2011 **
2/24/2011 **
2/25/2011 **
2/26/2011 **
2/27/2011 **
2/28/2011 **
3/1/2011 **
3/2/2011 1.66
3/3/2011 **
3/4/2011 **
3/5/2011 **
3/6/2011 **
3/7/2011 **
3/8/2011 **
3/9/2011 **
3/10/2011 **
3/11/2011 **
3/12/2011 **
3/13/2011 **
3/14/2011 **
3/15/2011 **
3/16/2011 **
3/17/2011 **
3/18/2011 **
3/19/2011 **
3/20/2011 **
3/21/2011 **
3/22/2011 **
3/23/2011 **
3/24/2011 **
3/25/2011 **
3/26/2011 **
3/27/2011 **
3/28/2011 **
3/29/2011 **
3/30/2011 **
3/31/2011 **
Day of YearDaily PrcpMultiday Prcp
4/1/2011 **
4/2/2011 **
4/3/2011 **
4/4/2011 **
4/5/2011 **
4/6/2011 **
4/7/2011 **
4/8/2011 **
4/9/2011 **
4/10/2011 **
4/11/2011 **
4/12/2011 **
4/13/2011 **
4/14/2011 **
4/15/2011 **
4/16/2011 **
4/17/2011 **
4/18/2011 0.50
4/19/2011 **
4/20/2011 **
4/21/2011 **
4/22/2011 **
4/23/2011 **
4/24/2011 1.80
4/25/2011 **
4/26/2011 **
4/27/2011 **
4/28/2011 **
4/29/2011 **
4/30/2011 **
5/1/2011 **
5/2/2011 **
5/3/2011 **
5/4/2011 **
5/5/2011 **
5/6/2011 **
5/7/2011 **
5/8/2011 **
5/9/2011 **
5/10/2011 **
5/11/2011 **
5/12/2011 **
5/13/2011 0.00
5/14/2011 **
5/15/2011 0.00 **
5/16/2011 **
5/17/2011 **
5/18/2011 **
5/19/2011 0.10
5/20/2011 **
5/21/2011 **
5/22/2011 **
5/23/2011 **
5/24/2011 **
5/25/2011 **
5/26/2011 **
5/27/2011 **
5/28/2011 **
5/29/2011 **
5/30/2011 **
5/31/2011 **
6/1/2011 **
6/2/2011 **
6/3/2011 **
6/4/2011 **
6/5/2011 **
6/6/2011 **
6/7/2011 **
6/8/2011 2.33
6/9/2011 **
6/10/2011 2.25
6/11/2011 **
6/12/2011 **
6/13/2011 0.38
6/14/2011 0.00
6/15/2011 **
6/16/2011 0.70
6/17/2011 **
6/18/2011 0.00
6/19/2011 **
6/20/2011 **
6/21/2011 **
6/22/2011 0.50
6/23/2011 0.10
6/24/2011 **
6/25/2011 **
6/26/2011 **
6/27/2011 **
6/28/2011 **
6/29/2011 **
6/30/2011 **
Day of YearDaily PrcpMultiday Prcp
7/1/2011 **
7/2/2011 **
7/3/2011 **
7/4/2011 **
7/5/2011 **
7/6/2011 0.05
7/7/2011 **
7/8/2011 **
7/9/2011 **
7/10/2011 **
7/11/2011 **
7/12/2011 **
7/13/2011 **
7/14/2011 **
7/15/2011 **
7/16/2011 **
7/17/2011 **
7/18/2011 **
7/19/2011 **
7/20/2011 **
7/21/2011 **
7/22/2011 **
7/23/2011 **
7/24/2011 **
7/25/2011 1.51
7/26/2011 **
7/27/2011 **
7/28/2011 **
7/29/2011 **
7/30/2011 **
7/31/2011 **
8/1/2011 **
8/2/2011 **
8/3/2011 **
8/4/2011 **
8/5/2011 **
8/6/2011 **
8/7/2011 **
8/8/2011 0.32
8/9/2011 **
8/10/2011 **
8/11/2011 0.82
8/12/2011 **
8/13/2011 **
8/14/2011 **
8/15/2011 **
8/16/2011 **
8/17/2011 **
8/18/2011 **
8/19/2011 **
8/20/2011 **
8/21/2011 **
8/22/2011 **
8/23/2011 **
8/24/2011 **
8/25/2011 **
8/26/2011 **
8/27/2011 **
8/28/2011 **
8/29/2011 **
8/30/2011 **
8/31/2011 **
9/1/2011 **
9/2/2011 0.81
9/3/2011 **
9/4/2011 **
9/5/2011 **
9/6/2011 **
9/7/2011 **
9/8/2011 0.11
9/9/2011 **
9/10/2011 **
9/11/2011 **
9/12/2011 **
9/13/2011 **
9/14/2011 **
9/15/2011 **
9/16/2011 **
9/17/2011 **
9/18/2011 **
9/19/2011 **
9/20/2011 **
9/21/2011 **
9/22/2011 **
9/23/2011 **
9/24/2011 **
9/25/2011 **
9/26/2011 **
9/27/2011 **
9/28/2011 2.00
9/29/2011
9/30/2011 **



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
12/25/2010 7:00 AM 0.22 2.0 M M M
12/26/2010 7:00 AM 0.20 1.8 M 7.0 M
2/1/2011 7:00 PM 0.00 0.0 M M M Blizzard conditions. As of 2000 hours, visibility down to 1/4 miles in residential area of southern DuPage county, Illinois with very strong wind gusts, heavy snow, and considerable drifting. Snow rates from 3:00 to 4:00 pm was at at rate of 1.25 inches. At 10:15 a brief burst of lightening was observed. Visibility has dropped to 1/8 mile with heavy and drifting snow and strong gusty winds
2/2/2011 7:00 AM 1.56 18.0 M 22.0 M
2/3/2011 7:00 AM 0.00 0.0 M 18.0 M
5/15/2011 7:00 AM 0.00 0.0 M M M
6/14/2011 7:00 AM 0.00 0.0 M M M
6/23/2011 7:00 AM 0.10 M M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
9/10/2010 10/01/2010 12:00 AM 22 0.40 M M
9/11/2010 10/25/2010 12:00 AM 45 0.30 M M
10/25/2010 11/01/2010 12:00 AM 8 0.20 M M
11/2/2010 12/03/2010 12:00 AM 32 0.65 M M
12/4/2010 12/07/2010 12:00 AM 4 1.00 M M Water equivalent for melted snow storm which began on Friday (12/3) night and ended on early Saturday (12/4) afternoon
12/8/2010 12/20/2010 12:00 AM 13 0.40 M M Water equivalent for freezing rain, sleet, rain, and snow.
12/21/2010 12/24/2010 12:00 AM 4 0.00 M M
12/27/2010 12/29/2010 12:00 AM 3 0.00 6.0 M
12/30/2010 1/01/2011 12:00 AM 3 0.85 0.0 M All precipitation from 12/30 to 1/1/11 was rain which melted all the snow. No snow depth by 1/1/11.
1/2/2011 1/04/2011 12:00 AM 3 0.00 0.0 M
1/5/2011 1/29/2011 12:00 AM 25 0.34 3.0 M
1/31/2011 2/01/2011 12:00 AM 2 2.50 M M
2/3/2011 2/06/2011 12:00 AM 4 2.00 24.0 M
2/7/2011 2/11/2011 12:00 AM 5 0.00 11.0 M
2/12/2011 2/18/2011 12:00 AM 7 2.00 0.0 M All snow from the blizzard has melted. No snow cover except in piles
2/19/2011 3/02/2011 12:00 AM 12 1.66 M M
3/3/2011 3/14/2011 12:00 AM 12 1.15 0.0 M
3/4/2011 4/15/2011 12:00 AM 43 0.55 M M
4/15/2011 4/18/2011 12:00 AM 4 0.50 M M
4/19/2011 4/24/2011 12:00 AM 6 1.80 M M
4/25/2011 5/13/2011 12:00 AM 19 0.00 M M
5/14/2011 5/19/2011 12:00 AM 6 0.10 M M
5/20/2011 6/08/2011 12:00 AM 20 2.33 M M
6/9/2011 6/10/2011 12:00 AM 2 2.25 M M
6/11/2011 6/13/2011 12:00 AM 3 0.38 M M
6/15/2011 6/16/2011 12:00 AM 2 0.70 M M
6/17/2011 6/18/2011 12:00 AM 2 0.00 M M
6/19/2011 6/22/2011 12:00 AM 4 0.50 M M
6/24/2011 6/26/2011 12:00 AM 3 0.05 M M
6/26/2011 7/06/2011 12:00 AM 11 0.05 M M
7/7/2011 7/20/2011 12:00 AM 14 0.12 M M
7/20/2011 7/23/2011 12:00 AM 4 1.21 M M
7/23/2011 7/25/2011 12:00 AM 3 1.51 M M
7/26/2011 8/08/2011 12:00 AM 14 0.32 M M
8/9/2011 8/11/2011 12:00 AM 3 0.82 M M
8/12/2011 9/02/2011 12:00 AM 22 0.81 M M
9/3/2011 9/08/2011 12:00 AM 6 0.11 M M
9/9/2011 9/28/2011 12:00 AM 20 2.00 M M
9/30/2011 10/07/2011 12:00 AM 8 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