Station Overview Station Location
Station Number IL-DP-42 Latitude 41.91301
Station Name Carol Stream 0.3 SSE Longitude -88.129388
County Du Page Elevation (ft) 758



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 2.98 1.17 30 1.17 30 0.00 0 0 7 1 0.0 0 0
Nov 10 3.06 2.89 30 2.89 30 0.00 0 0 8 1 0.0 0 0
Dec 10 2.17 2.21 31 2.03 29 0.18 2 1 12 0 14.0 8 5
Jan 11 1.70 1.25 31 1.25 31 0.00 0 0 10 5 8.7 9 3
Feb 11 1.65 3.02 28 1.38 23 1.64 5 2 7 1 19.4 7 7
March 11 2.25 2.58 31 2.58 31 0.00 0 0 9 4 0.3 2 0
April 11 3.45 5.06 30 5.06 30 0.00 0 0 14 2 0.2 1 0
May 11 4.06 5.31 31 5.31 31 0.00 0 0 18 1 0.0 0 0
June 11 4.03 4.99 30 4.99 30 0.00 0 0 15 0 0.0 0 0
July 11 3.81 6.54 31 6.54 31 0.00 0 0 10 2 0.0 0 0
Aug 11 4.40 5.15 31 5.15 31 0.00 0 0 10 0 0.0 0 0
Sept 11 3.34 3.56 30 2.47 19 1.09 11 2 4 1 0.0 0 0
Water Year Totals: 36.90" 43.73" 364 days 40.82" 346 2.91" 18 days 5 124 days 18 days 42.6" 27 days 15 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 0.00
10/2/2010 0.19
10/3/2010 0.04
10/4/2010 0.00
10/5/2010 0.00
10/6/2010 0.00
10/7/2010 0.00
10/8/2010 0.00
10/9/2010 0.00
10/10/2010 0.00
10/11/2010 0.00
10/12/2010 0.00
10/13/2010 0.00
10/14/2010 0.28
10/15/2010 0.00
10/16/2010 0.00
10/17/2010 0.00
10/18/2010 0.00
10/19/2010 0.00
10/20/2010 0.00
10/21/2010 0.00
10/22/2010 0.00
10/23/2010 T
10/24/2010 0.17
10/25/2010 0.15
10/26/2010 0.32
10/27/2010 0.02
10/28/2010 0.00
10/29/2010 0.00
10/30/2010 0.00
10/31/2010
11/1/2010 0.00
11/2/2010 0.00
11/3/2010 0.00
11/4/2010 0.00
11/5/2010 0.05
11/6/2010 0.00
11/7/2010 0.00
11/8/2010 0.00
11/9/2010 0.00
11/10/2010 0.00
11/11/2010 0.00
11/12/2010 0.25
11/13/2010 0.09
11/14/2010 0.00
11/15/2010 0.08
11/16/2010 0.00
11/17/2010 0.00
11/18/2010 0.00
11/19/2010 0.00
11/20/2010 0.00
11/21/2010 T
11/22/2010 0.41
11/23/2010 1.14
11/24/2010 0.00
11/25/2010 0.23
11/26/2010 0.00
11/27/2010 0.00
11/28/2010 0.00
11/29/2010 0.00
11/30/2010 0.64
12/1/2010 0.04
12/2/2010 0.00
12/3/2010 0.00
12/4/2010 0.43
12/5/2010 0.02
12/6/2010 0.00
12/7/2010 0.00
12/8/2010 0.00
12/9/2010 0.00
12/10/2010 0.09
12/11/2010 **
12/12/2010 0.18
12/13/2010 0.00
12/14/2010 0.00
12/15/2010 0.00
12/16/2010 0.00
12/17/2010 0.04
12/18/2010 0.00
12/19/2010 0.00
12/20/2010 0.00
12/21/2010 0.31
12/22/2010 0.05
12/23/2010 0.00
12/24/2010 0.03
12/25/2010 0.25
12/26/2010 0.15
12/27/2010 0.00
12/28/2010 0.00
12/29/2010 0.00
12/30/2010 0.07
12/31/2010 0.55
Day of YearDaily PrcpMultiday Prcp
1/1/2011 0.20
1/2/2011 0.00
1/3/2011 0.00
1/4/2011 0.00
1/5/2011 0.00
1/6/2011 0.00
1/7/2011 0.00
1/8/2011 0.03
1/9/2011 0.00
1/10/2011 0.00
1/11/2011 0.08
1/12/2011 0.11
1/13/2011 T
1/14/2011 T
1/15/2011 0.00
1/16/2011 0.00
1/17/2011 0.05
1/18/2011 0.62
1/19/2011 T
1/20/2011 0.00
1/21/2011 0.00
1/22/2011 0.04
1/23/2011 0.00
1/24/2011 0.04
1/25/2011 0.00
1/26/2011 0.00
1/27/2011 T
1/28/2011 0.07
1/29/2011 T
1/30/2011 0.01
1/31/2011 0.00
2/1/2011 0.11
2/2/2011 0.84
2/3/2011 0.00
2/4/2011 0.00
2/5/2011 0.00
2/6/2011 0.17
2/7/2011 0.04
2/8/2011 0.00
2/9/2011 0.00
2/10/2011 0.00
2/11/2011 0.00
2/12/2011 0.05
2/13/2011 0.00
2/14/2011 0.00
2/15/2011 0.00
2/16/2011 T
2/17/2011 0.00
2/18/2011 0.00
2/19/2011 0.00
2/20/2011 **
2/21/2011 1.07
2/22/2011 0.05
2/23/2011 0.00
2/24/2011 0.12
2/25/2011 0.00
2/26/2011 **
2/27/2011 **
2/28/2011 0.57
3/1/2011 0.00
3/2/2011 0.00
3/3/2011 0.00
3/4/2011 0.08
3/5/2011 0.99
3/6/2011 0.05
3/7/2011 0.00
3/8/2011 0.00
3/9/2011 0.45
3/10/2011 T
3/11/2011 0.00
3/12/2011 0.00
3/13/2011 0.00
3/14/2011 0.00
3/15/2011 0.00
3/16/2011 0.00
3/17/2011 0.00
3/18/2011 0.00
3/19/2011 0.00
3/20/2011 0.26
3/21/2011 0.09
3/22/2011 0.30
3/23/2011 0.33
3/24/2011 0.03
3/25/2011 T
3/26/2011 T
3/27/2011 T
3/28/2011 0.00
3/29/2011 0.00
3/30/2011 0.00
3/31/2011 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2011 0.00
4/2/2011 0.05
4/3/2011 0.00
4/4/2011 0.40
4/5/2011 T
4/6/2011 0.00
4/7/2011 0.01
4/8/2011 0.74
4/9/2011 0.00
4/10/2011 0.00
4/11/2011 0.00
4/12/2011 0.00
4/13/2011 0.00
4/14/2011 0.00
4/15/2011 0.00
4/16/2011 0.63
4/17/2011 0.11
4/18/2011 0.61
4/19/2011 0.00
4/20/2011 0.73
4/21/2011 0.00
4/22/2011 0.32
4/23/2011 0.31
4/24/2011 T
4/25/2011 0.00
4/26/2011 0.67
4/27/2011 0.30
4/28/2011 0.14
4/29/2011 0.04
4/30/2011 0.00
5/1/2011 T
5/2/2011 0.00
5/3/2011 0.00
5/4/2011 0.02
5/5/2011 0.00
5/6/2011 0.14
5/7/2011 0.02
5/8/2011 0.00
5/9/2011 0.00
5/10/2011 0.01
5/11/2011 0.00
5/12/2011 0.29
5/13/2011 0.07
5/14/2011 0.02
5/15/2011 0.25
5/16/2011 0.00
5/17/2011 0.00
5/18/2011 0.05
5/19/2011 0.00
5/20/2011 0.00
5/21/2011 0.00
5/22/2011 0.02
5/23/2011 0.35
5/24/2011 0.08
5/25/2011 0.03
5/26/2011 2.01
5/27/2011 0.02
5/28/2011 0.02
5/29/2011 0.14
5/30/2011 1.77
5/31/2011 0.00
6/1/2011 0.15
6/2/2011 0.00
6/3/2011 0.01
6/4/2011 0.00
6/5/2011 0.24
6/6/2011 0.00
6/7/2011 0.00
6/8/2011 0.00
6/9/2011 1.59
6/10/2011 1.30
6/11/2011 0.03
6/12/2011 0.00
6/13/2011 0.00
6/14/2011 0.00
6/15/2011 0.51
6/16/2011 0.29
6/17/2011 0.00
6/18/2011 0.00
6/19/2011 0.00
6/20/2011 0.08
6/21/2011 0.25
6/22/2011 0.26
6/23/2011 0.21
6/24/2011 0.00
6/25/2011 0.01
6/26/2011 0.00
6/27/2011 0.04
6/28/2011 0.02
6/29/2011 0.00
6/30/2011 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2011 0.00
7/2/2011 0.00
7/3/2011 0.00
7/4/2011 0.00
7/5/2011 0.00
7/6/2011 T
7/7/2011 0.15
7/8/2011 0.00
7/9/2011 0.00
7/10/2011 0.00
7/11/2011 T
7/12/2011 0.29
7/13/2011 0.04
7/14/2011 0.00
7/15/2011 0.00
7/16/2011 0.00
7/17/2011 0.00
7/18/2011 0.00
7/19/2011 0.00
7/20/2011 0.00
7/21/2011 0.00
7/22/2011 0.21
7/23/2011 3.48
7/24/2011 0.09
7/25/2011 0.08
7/26/2011 0.00
7/27/2011 0.01
7/28/2011 1.15
7/29/2011 1.04
7/30/2011 0.00
7/31/2011 0.00
8/1/2011 0.00
8/2/2011 0.00
8/3/2011 0.73
8/4/2011 0.00
8/5/2011 0.00
8/6/2011 0.54
8/7/2011 0.52
8/8/2011 0.23
8/9/2011 0.72
8/10/2011 0.00
8/11/2011 0.00
8/12/2011 0.00
8/13/2011 0.00
8/14/2011 0.54
8/15/2011 0.02
8/16/2011 0.00
8/17/2011 0.00
8/18/2011 0.00
8/19/2011 0.00
8/20/2011 0.00
8/21/2011 0.98
8/22/2011 0.00
8/23/2011 0.00
8/24/2011 0.80
8/25/2011 0.00
8/26/2011 0.00
8/27/2011 0.00
8/28/2011 0.00
8/29/2011 0.00
8/30/2011 0.00
8/31/2011 0.07
9/1/2011 0.00
9/2/2011 0.00
9/3/2011 0.00
9/4/2011 0.04
9/5/2011 0.00
9/6/2011 0.00
9/7/2011 0.00
9/8/2011 0.00
9/9/2011 0.00
9/10/2011 0.00
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 0.92
9/20/2011 0.00
9/21/2011 0.00
9/22/2011 0.00
9/23/2011 0.00
9/24/2011 T
9/25/2011 0.00
9/26/2011 1.55
9/27/2011 0.74
9/28/2011 0.14
9/29/2011 **
9/30/2011 0.17



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2010 7:00 AM 0.00 0.0 M M M
10/2/2010 7:00 AM 0.19 M M M M
10/3/2010 7:00 AM 0.04 0.0 M M M
10/4/2010 7:00 AM 0.00 0.0 M M M
10/5/2010 7:00 AM 0.00 0.0 M M M
10/6/2010 7:00 AM 0.00 0.0 M M M
10/7/2010 7:00 AM 0.00 0.0 M M M
10/8/2010 7:00 AM 0.00 0.0 M M M
10/9/2010 7:00 AM 0.00 0.0 M M M
10/10/2010 7:00 AM 0.00 0.0 M M M
10/11/2010 7:00 AM 0.00 0.0 M M M
10/12/2010 7:00 AM 0.00 0.0 M M M
10/13/2010 7:00 AM 0.00 0.0 M M M
10/14/2010 7:00 AM 0.28 M M M M Much thunder but only brief heavy rain.
10/15/2010 7:00 AM 0.00 0.0 M M M
10/16/2010 7:00 AM 0.00 0.0 M M M
10/17/2010 7:00 AM 0.00 0.0 M M M
10/18/2010 7:00 AM 0.00 0.0 M M M
10/19/2010 7:00 AM 0.00 0.0 M M M
10/20/2010 7:00 AM 0.00 0.0 M M M
10/21/2010 7:00 AM 0.00 0.0 M M M
10/22/2010 7:00 AM 0.00 0.0 M M M
10/23/2010 9:25 AM T M M M M Light rain but not measurable.
10/24/2010 7:00 PM 0.17 M M M M
10/25/2010 8:00 AM 0.15 M M M M Some thunder but mostly short-lived heavy rain.
10/26/2010 8:30 AM 0.32 M M M M Very windy but no severe observed
10/27/2010 7:00 AM 0.02 M M M M
10/28/2010 7:00 AM 0.00 0.0 M M M
10/29/2010 7:00 AM 0.00 0.0 M M M
10/30/2010 7:00 AM 0.00 0.0 M M M
11/1/2010 7:00 AM 0.00 0.0 M M M
11/2/2010 7:00 AM 0.00 0.0 M M M
11/3/2010 7:00 AM 0.00 0.0 M M M
11/4/2010 7:00 AM 0.00 0.0 M M M
11/5/2010 7:00 AM 0.05 M M M M
11/6/2010 7:00 AM 0.00 0.0 M M M
11/7/2010 7:00 AM 0.00 0.0 M M M
11/8/2010 7:00 AM 0.00 0.0 M M M
11/9/2010 7:00 AM 0.00 0.0 M M M
11/10/2010 7:00 AM 0.00 0.0 M M M
11/11/2010 7:00 AM 0.00 0.0 M M M
11/12/2010 7:45 AM 0.25 M M M M Persistent light rain.
11/13/2010 11:00 AM 0.09 M M M M
11/14/2010 7:00 AM 0.00 0.0 M M M
11/15/2010 7:00 AM 0.08 M M M M Some ice pellets, mostly light rain. No snow.
11/16/2010 7:00 AM 0.00 0.0 M M M
11/17/2010 7:00 AM 0.00 0.0 M M M
11/18/2010 7:00 AM 0.00 0.0 M M M
11/19/2010 7:00 AM 0.00 0.0 M M M
11/20/2010 7:00 AM 0.00 0.0 M M M
11/21/2010 10:00 AM T M M M M
11/22/2010 8:45 AM 0.41 M M M M Nearly an hour and half of continuous thunder, some moderate rain but no flooding.
11/23/2010 8:40 AM 1.14 M M M M Total for yesterday including morning precipitation: 1.55"
11/24/2010 7:00 AM 0.00 0.0 M M M
11/25/2010 7:00 AM 0.23 M M M M
11/26/2010 7:00 AM 0.00 0.0 M M M
11/27/2010 7:00 AM 0.00 0.0 M M M
11/28/2010 7:00 AM 0.00 0.0 M M M
11/29/2010 7:00 AM 0.00 0.0 M M M
11/30/2010 8:00 AM 0.64 M M M M Moderate rain throughout the night, but no flooding.
12/1/2010 7:00 PM 0.04 0.1 0.04 M M
12/2/2010 7:00 AM 0.00 0.0 M M M
12/3/2010 7:00 AM 0.00 0.0 M M M
12/4/2010 1:45 PM 0.43 4.0 0.43 4.0 M Light flurries continue.
12/5/2010 7:00 AM 0.02 T M M M
12/6/2010 7:00 AM 0.00 0.0 M M M
12/7/2010 7:00 AM 0.00 0.0 M 3.5 M
12/8/2010 7:00 AM 0.00 0.0 M M M
12/9/2010 7:00 AM 0.00 0.0 M M M
12/10/2010 7:00 AM 0.09 1.3 M M M Moderate snow for about an hour at 8:30 or so.
12/13/2010 7:00 AM 0.00 0.0 M M M
12/14/2010 7:00 AM 0.00 0.0 M M M
12/15/2010 7:00 AM 0.00 0.0 M M M
12/16/2010 8:00 AM 0.00 0.0 M M M No precipitation.
12/17/2010 7:00 AM 0.04 1.0 M M M
12/18/2010 7:00 AM 0.00 0.0 M M M
12/19/2010 7:00 AM 0.00 0.0 M M M
12/20/2010 7:00 AM 0.00 0.0 M M M
12/21/2010 9:00 AM 0.31 3.9 M 4.5 M See associated significant weather report for more details. Thin glaze of ice this morning after the snowfall
12/22/2010 7:00 AM 0.05 T M M M Very foggy most of the night.
12/23/2010 7:00 AM 0.00 0.0 M M M
12/24/2010 11:30 AM 0.03 0.3 M M M Light to moderate snow at this time.
12/25/2010 11:00 AM 0.25 1.6 M M M 33.1° F. Snow has settled some.
12/26/2010 12:00 PM 0.15 1.8 M 8.0 1.12 Light snow throughout the night; see sig. weather report.
12/27/2010 7:00 AM 0.00 0.0 M M M 8.1 degrees
12/28/2010 7:00 AM 0.00 0.0 M M M
12/29/2010 7:00 AM 0.00 0.0 M M M
12/30/2010 7:00 AM 0.07 M M 3.0 M Mist and drizzle all night. Snow depth estimated to be about 3 inches at this point.
12/31/2010 9:20 AM 0.55 0.0 0.00 0.0 0.00 Constant thunder from 6:30a onwards, but it has stopped raining.
1/1/2011 7:00 AM 0.20 M M M M This is an exact value.
1/2/2011 7:00 AM 0.00 0.0 M M M
1/3/2011 7:00 AM 0.00 0.0 M M M
1/4/2011 7:00 AM 0.00 0.0 M M M
1/5/2011 7:00 AM 0.00 0.0 M M M
1/6/2011 7:00 AM 0.00 0.0 M M M
1/7/2011 7:00 AM 0.00 0.0 M M M
1/8/2011 7:00 AM 0.03 0.6 M 0.5 M
1/9/2011 7:00 AM 0.00 0.0 M M M
1/10/2011 7:00 AM 0.00 0.0 M M M
1/11/2011 9:00 AM 0.08 1.5 M 2.0 M 26.0 degrees. Light to moderate snow falling at the time.
1/12/2011 9:00 AM 0.11 1.3 0.12 M M Storm total 2.8"
1/13/2011 7:00 AM T T T M M
1/14/2011 7:00 AM T T T M M
1/15/2011 7:00 AM 0.00 0.0 M M M
1/16/2011 7:00 AM 0.00 0.0 M M M
1/17/2011 8:50 AM 0.05 0.3 M M M Light snow, 22.5° F.
1/18/2011 9:30 AM 0.62 2.2 M M M Moderate snow, sleet. Storm total 2.5" snow, ~0.74" liquid
1/19/2011 9:00 AM T T T 3.0 M Just a trace on the ground and in the can.
1/20/2011 7:00 AM 0.00 0.0 M M M
1/21/2011 7:00 AM 0.00 0.0 M M M
1/22/2011 10:00 AM 0.04 1.2 0.04 M M Light snow, on and off.
1/23/2011 7:00 AM 0.00 0.0 M M M
1/24/2011 8:45 AM 0.04 0.6 M M M
1/25/2011 7:00 AM 0.00 0.0 M M M
1/26/2011 7:00 AM 0.00 0.0 M M M
1/27/2011 7:00 AM T M M M M
1/28/2011 7:00 AM 0.07 0.9 M M M
1/29/2011 7:00 AM T T M M M
1/30/2011 7:00 AM 0.01 0.1 M M M
1/31/2011 7:00 AM 0.00 0.0 M M M
2/1/2011 9:00 AM 0.11 1.2 0.11 5.5 M Ongoing lake effect snow. 23.4° F.
2/2/2011 9:00 AM 0.84 14.8 1.12 20.0 M Storm total: 16.0" on 1.12" of water equivalent, measured at 2 sites around the house. Thundersnow throughout the 8p-10p period last night. Drifts to 2 feet. Still windy. Total snow depth: 20.0".
2/3/2011 7:00 AM 0.00 0.0 M M M
2/4/2011 7:00 AM 0.00 0.0 M M M
2/5/2011 7:00 AM 0.00 0.0 M M M
2/6/2011 11:30 AM 0.17 2.1 0.17 M M Some light snow ongoing.
2/7/2011 9:00 AM 0.04 0.5 M M M
2/8/2011 7:00 AM 0.00 0.0 M M M
2/9/2011 7:00 AM 0.00 0.0 M M M
2/10/2011 7:00 AM 0.00 0.0 M M M
2/11/2011 7:00 AM 0.00 0.0 M M M
2/12/2011 9:00 AM 0.05 0.1 M 14.0 3.27
2/13/2011 7:00 AM 0.00 0.0 M M M
2/14/2011 7:00 AM 0.00 0.0 M M M
2/15/2011 7:00 AM 0.00 0.0 0.00 6.5 M
2/16/2011 7:00 AM T M M 6.5 M
2/17/2011 7:00 AM 0.00 0.0 M M M
2/18/2011 7:00 AM 0.00 0.0 M M M
2/19/2011 7:00 AM 0.00 0.0 M M M
2/22/2011 7:00 AM 0.05 0.5 M 0.5 M Light freezing drizzle overnight, followed by light snow this morning.
2/23/2011 7:00 AM 0.00 0.0 M M M
2/24/2011 7:00 AM 0.12 0.2 M 0.5 M Heavy snow with thunder, large flakes but minimal accumulation.
2/25/2011 7:00 AM 0.00 0.0 M M M
3/1/2011 7:00 AM 0.00 0.0 M M M
3/2/2011 7:00 AM 0.00 0.0 M M M
3/3/2011 7:00 AM 0.00 0.0 M M M
3/4/2011 8:00 AM 0.08 M M 0.0 M Light rain ongoing.
3/5/2011 8:00 AM 0.99 M M M M Storm total: 1.07"
3/6/2011 7:00 AM 0.05 0.2 M 0.0 M Storm total: 1.13"
3/7/2011 7:00 AM 0.00 0.0 M M M
3/8/2011 7:00 AM 0.00 0.0 M M M
3/9/2011 8:00 AM 0.45 M M M M Drizzle at time of observation.
3/10/2011 7:00 AM T M M M M
3/11/2011 7:00 AM 0.00 0.0 M M M
3/12/2011 7:00 AM 0.00 0.0 M M M
3/13/2011 7:00 AM 0.00 0.0 M M M
3/14/2011 7:00 AM 0.00 0.0 M M M
3/15/2011 7:00 AM 0.00 0.0 M M M
3/16/2011 7:00 AM 0.00 0.0 M M M
3/17/2011 7:00 AM 0.00 0.0 M M M
3/18/2011 7:00 AM 0.00 0.0 M M M
3/19/2011 7:00 AM 0.00 0.0 M M M
3/20/2011 12:15 PM 0.26 M M M M Some small (less the pea-size) hail. Near-constant thunder.
3/21/2011 7:00 AM 0.09 M M M M Storm total: 0.35"
3/22/2011 7:00 AM 0.30 M M M M This is an exact measurement. Ongoing thunderstorms throughout the night, but fortunately not that much rain.
3/23/2011 8:45 AM 0.33 M M M M Some thunder and small hail.
3/24/2011 8:00 AM 0.03 0.1 M M M Light snow through the evening hours.
3/25/2011 7:00 AM T T T M M
3/26/2011 7:00 AM T T T M M
3/27/2011 7:00 AM T T T M M
3/28/2011 7:00 AM 0.00 0.0 M M M
3/29/2011 7:00 AM 0.00 0.0 M M M
3/30/2011 7:00 AM 0.00 0.0 M M M
3/31/2011 7:00 AM 0.00 0.0 M M M
4/1/2011 7:00 AM 0.00 0.0 M M M
4/2/2011 7:00 AM 0.05 M M M M
4/3/2011 7:00 AM 0.00 0.0 M M M
4/4/2011 8:00 AM 0.40 M M M M Scattered thunderstorms but no severe wind or hail.
4/5/2011 7:00 AM T M M M M
4/6/2011 7:00 AM 0.00 0.0 M M M
4/7/2011 7:00 AM 0.01 M M M M
4/8/2011 7:45 AM 0.74 M M M M No lightning or thunder to report.
4/9/2011 7:00 AM 0.00 0.0 M M M
4/10/2011 7:00 AM 0.00 0.0 M M M
4/11/2011 7:00 AM 0.00 0.0 M M M
4/12/2011 7:00 AM 0.00 0.0 M M M
4/13/2011 7:00 AM 0.00 0.0 M M M
4/14/2011 7:00 AM 0.00 0.0 M M M
4/15/2011 7:00 AM 0.00 0.0 M M M
4/16/2011 9:15 AM 0.63 M M M M One blast of thunder nearby, but that was it.
4/17/2011 7:00 AM 0.11 T T 0.0 0.00 Moderate snow at times
4/18/2011 7:00 AM 0.61 0.2 0.00 0.0 0.00 Moderate rain at times overnight.
4/19/2011 7:00 AM 0.00 0.0 M M M
4/20/2011 7:00 AM 0.73 M M M M Wasn't at home to observe the storm, but in Schaumburg there was frequent lightning and small hail. Flood retention ponds are about 10-20% full; Lake George is on the verge of overflowing.
4/21/2011 7:00 AM 0.00 0.0 M M M
4/22/2011 8:00 AM 0.32 M M M M 41.0°­ F
4/23/2011 8:00 AM 0.31 M M M M Lots of mist and drizzle.
4/24/2011 7:00 AM T M M M M
4/25/2011 7:00 AM 0.00 0.0 M M M
4/26/2011 7:00 AM 0.67 M M M M A good soaker, but no thunder observed.
4/27/2011 8:30 AM 0.30 M M M M This is an exact measurement. Light rain at the time.
4/28/2011 7:00 AM 0.14 M M M M Light rain mostly in the morning.
4/29/2011 7:50 AM 0.04 M M M M
4/30/2011 7:00 AM 0.00 0.0 M M M
5/1/2011 7:00 AM T M M M M
5/2/2011 7:00 AM 0.00 0.0 M M M
5/3/2011 7:00 AM 0.00 0.0 M M M
5/4/2011 7:00 AM 0.02 M M M M Light rain throughout the afternoon.
5/5/2011 7:00 AM 0.00 0.0 M M M
5/6/2011 7:00 AM 0.14 M M M M Thunder, moderate rain.
5/7/2011 9:30 AM 0.02 M M M M
5/8/2011 7:00 AM 0.00 0.0 M M M
5/9/2011 7:00 AM 0.00 0.0 M M M
5/10/2011 7:00 AM 0.01 M M M M Light rain
5/11/2011 7:00 AM 0.00 0.0 M M M
5/12/2011 7:50 AM 0.29 M M M M Two separate waves of thunderstorms. Minimal amounts of small, pea sized hail.
5/13/2011 8:00 AM 0.07 M M M M Heavy rain, thunder, rice-sized hail just a half mile to the north.
5/14/2011 7:00 AM 0.02 M M M M
5/15/2011 10:30 AM 0.25 M M M M
5/16/2011 7:00 AM 0.00 0.0 M M M
5/17/2011 7:00 AM 0.00 0.0 M M M
5/18/2011 8:10 AM 0.05 M M M M
5/19/2011 7:00 AM 0.00 0.0 M M M
5/20/2011 7:00 AM 0.00 0.0 M M M
5/21/2011 7:00 AM 0.00 0.0 M M M
5/22/2011 7:00 AM 0.02 M M M M
5/23/2011 7:00 AM 0.35 M M M M Thunder, no severe.
5/24/2011 7:00 AM 0.08 M M M M Light rain, no thunder.
5/25/2011 7:00 AM 0.03 M M M M Frequent thunder heard from approaching system.
5/26/2011 8:15 AM 2.01 M M M M 0.97" after first wave in morning, 1.04" after second. Thunder but no flooding.
5/27/2011 7:00 AM 0.02 M M M M
5/28/2011 7:00 AM 0.02 M M M M
5/29/2011 4:30 AM 0.14 M M M M Dense fog (visibility ~200') and lots of condensation.
5/30/2011 7:00 AM 1.77 M M M M See significant preciptation report. Heavy rain, thunder, street flooding, 15-minute rainfall rates > 3" / hr.
5/31/2011 7:00 AM 0.00 0.0 M M M
6/1/2011 7:00 AM 0.15 M M M M
6/2/2011 7:00 AM 0.00 0.0 M M M
6/3/2011 7:00 AM 0.01 M M M M
6/4/2011 7:00 AM 0.00 0.0 M M M
6/5/2011 7:00 AM 0.24 M M M M Lots of thunder, lightning, no severe.
6/6/2011 7:00 AM 0.00 0.0 M M M
6/7/2011 7:00 AM 0.00 0.0 M M M
6/8/2011 7:00 AM 0.00 0.0 M M M
6/9/2011 7:35 AM 1.59 M M M M Ongoing thunder all night long. So far only minor flooding to report. Current rain is the hardest it's rained yet.
6/10/2011 8:00 AM 1.30 M M M M All of the rain has moved out of the area, according to the radar. 0.53" last night. 0.77" after measuring yesterday morning's observation. 2-day storm total 2.89".
6/11/2011 7:00 AM 0.03 M M M M
6/12/2011 7:00 AM 0.00 0.0 M M M
6/13/2011 7:00 AM 0.00 0.0 M M M
6/14/2011 7:00 AM 0.00 0.0 M M M
6/15/2011 8:21 AM 0.51 M M M M Thunder and moderate rain, at best.
6/16/2011 8:00 AM 0.29 M M M M Light rain, no thunder.
6/17/2011 7:00 AM 0.00 0.0 M M M
6/18/2011 7:00 AM 0.00 0.0 M M M
6/19/2011 7:00 AM 0.00 0.0 M M M
6/20/2011 7:05 AM 0.08 M M M M Frequent, distant thunder.
6/21/2011 7:00 AM 0.25 M M M M Distant thunder when it rained. No severe.
6/22/2011 7:00 AM 0.26 M M M M Small branches ripped off a few neighborhood trees, but likely not severe.
6/23/2011 7:00 AM 0.21 M M M M
6/24/2011 7:00 AM 0.00 0.0 M M M
6/25/2011 7:00 AM 0.01 M M M M
6/26/2011 7:00 AM 0.00 0.0 M M M
6/27/2011 8:30 AM 0.04 M M M M Light rain continues.
6/28/2011 7:00 AM 0.02 M M M M
6/29/2011 7:00 AM 0.00 0.0 M M M
6/30/2011 7:00 AM 0.00 0.0 M M M
7/1/2011 7:00 AM 0.00 0.0 M M M
7/2/2011 7:00 AM 0.00 0.0 M M M
7/3/2011 7:00 AM 0.00 0.0 M M M
7/4/2011 7:00 AM 0.00 0.0 M M M
7/5/2011 7:00 AM 0.00 0.0 M M M
7/6/2011 7:00 AM T M M M M Very light sprinkles ~10:30p last night.
7/7/2011 8:45 AM 0.15 M M M M Not sure when this happened.
7/8/2011 7:00 AM 0.00 0.0 M M M
7/9/2011 7:00 AM 0.00 0.0 M M M
7/10/2011 7:00 AM 0.00 0.0 M M M
7/11/2011 7:45 AM T M M M M Some drops of rain yesterday afternoon. Currently awaiting severe line of storms.
7/12/2011 7:00 AM 0.29 M M M M Power still out in this section of Carol Stream this morning. Healthy 4-6" branches down.
7/13/2011 7:00 AM 0.04 M M M M Spotty showers.
7/14/2011 7:00 AM 0.00 0.0 M M M
7/15/2011 7:00 AM 0.00 0.0 M M M
7/16/2011 7:00 AM 0.00 0.0 M M M
7/17/2011 7:00 AM 0.00 0.0 M M M
7/18/2011 7:00 AM 0.00 0.0 M M M
7/19/2011 7:00 AM 0.00 0.0 M M M
7/20/2011 7:00 AM 0.00 0.0 M M M
7/21/2011 7:00 AM 0.00 0.0 M M M
7/22/2011 9:00 AM 0.21 M M M M
7/23/2011 8:45 AM 3.48 M M M M See associates sig. weather report. Quite a bit of water spilling into Lake George overflow. Klein Creek 6-10" above bankfull, from 3" deep prior to storms.
7/24/2011 9:25 AM 0.09 M M M M Lots of storms everywhere else, and the constant rumble of thunder, but no excessive accumulations.
7/25/2011 8:00 AM 0.08 M M M M
7/26/2011 7:00 AM 0.00 0.0 M M M
7/27/2011 8:00 AM 0.01 M M M M Light showers at time of observation
7/28/2011 8:15 AM 1.15 M M M M Power is out, again. Severe winds struck last night, downing large branches and at least one tree over a 2 square mile area.
7/29/2011 8:00 AM 1.04 M M M M Two known brief periods of heavy rain, but no flooding observed.
7/30/2011 7:00 AM 0.00 0.0 M M M
7/31/2011 7:00 AM 0.00 0.0 M M M
8/1/2011 7:00 AM 0.00 0.0 M M M
8/2/2011 7:00 AM 0.00 0.0 M M M
8/3/2011 8:25 AM 0.73 M M M M See sig. precip report.
8/4/2011 7:00 AM 0.00 0.0 M M M
8/5/2011 7:00 AM 0.00 0.0 M M M
8/6/2011 9:00 AM 0.54 M M M M
8/7/2011 10:30 AM 0.52 M M M M Bulk of rain fell in the last hour.
8/8/2011 7:00 AM 0.23 M M M M Heavy dew in the gauge.
8/9/2011 7:00 AM 0.72 M M M M Nearly continuous light to moderate rain during the afternoon/evening.
8/10/2011 7:00 AM 0.00 0.0 M M M
8/11/2011 7:00 AM 0.00 0.0 M M M
8/12/2011 7:00 AM 0.00 0.0 M M M
8/13/2011 7:00 AM 0.00 0.0 M M M
8/14/2011 7:00 AM 0.54 M M M M No severe.
8/15/2011 7:00 AM 0.02 M M M M Really, really heavy dew. The ground was saturated!
8/16/2011 7:00 AM 0.00 0.0 M M M
8/17/2011 7:00 AM 0.00 0.0 M M M
8/18/2011 7:00 AM 0.00 0.0 M M M
8/19/2011 7:00 AM 0.00 0.0 M M M
8/20/2011 7:00 AM 0.00 0.0 M M M
8/21/2011 7:00 AM 0.98 M M M M Heavy rain for 30 minutes in the morning, limited amount of rain in the afternoon.
8/22/2011 7:00 AM 0.00 0.0 M M M
8/23/2011 7:00 AM 0.00 0.0 M M M
8/24/2011 7:00 AM 0.80 M M M M 0.79" rain, 0.01" in dew. Heavy dew this morning.
8/25/2011 7:00 AM 0.00 0.0 M M M
8/26/2011 7:00 AM 0.00 0.0 M M M
8/27/2011 7:00 AM 0.00 0.0 M M M
8/28/2011 7:00 AM 0.00 0.0 M M M
8/29/2011 7:00 AM 0.00 0.0 M M M
8/30/2011 7:00 AM 0.00 0.0 M M M
8/31/2011 7:00 AM 0.07 M M M M
9/1/2011 7:00 AM 0.00 0.0 M M M
9/2/2011 7:00 AM 0.00 0.0 M M M
9/3/2011 7:00 AM 0.00 0.0 M M M
9/4/2011 7:00 AM 0.04 M M M M That was disappointing.
9/5/2011 7:00 AM 0.00 0.0 M M M
9/6/2011 7:00 AM 0.00 0.0 M M M
9/7/2011 7:00 AM 0.00 0.0 M M M
9/8/2011 7:00 AM 0.00 0.0 M M M
9/9/2011 7:00 AM 0.00 0.0 M M M
9/10/2011 7:00 AM 0.00 0.0 M M M
9/20/2011 7:00 AM 0.00 0.0 M M M
9/21/2011 7:00 AM 0.00 0.0 M M M
9/22/2011 7:00 AM 0.00 0.0 M M M
9/23/2011 7:00 AM 0.00 0.0 M M M
9/24/2011 7:00 AM T M M M M
9/25/2011 7:00 AM 0.00 0.0 M M M
9/26/2011 8:30 AM 1.55 M M M M Almost all fell after midnight! No thunder that I knew of.
9/27/2011 8:30 AM 0.74 M M M M No thunder, still sprinkling at time of observation.
9/28/2011 8:45 AM 0.14 M M M M 3-day total: 2.43"



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
12/11/2010 12/12/2010 10:00 PM 2 0.18 1.0 M This is a rough estimate, since I didn't leave the cylinder out for the rainfall portion of the event. All I know is 0.11" of the precip I did catch, and it was snow.
2/20/2011 2/21/2011 8:45 AM 2 1.07 0.0 0.00 All fell as rain.
2/26/2011 2/28/2011 9:00 AM 3 0.57 0.0 0.00 Includes 0.1" of ice measured as of last night, during the freezing rain thunderstorm.
9/11/2011 9/19/2011 9:05 AM 9 0.92 0.0 0.00
9/29/2011 9/30/2011 5:00 PM 2 0.17 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
3/22/2011 5:10 AM Rice Rice Rice Hard 2 no damage Intermittent True After rain
4/22/2011 5:38 PM Also some thunder, 0.04" of rain. 1/4" Pea Size 1/4" Pea Size Rice Hard|White Ice 2 1min no damage Continuous True After rain Same time as smaller hail vertical
5/11/2011 7:28 PM Corner of Golf @ Algonquin Road in Arlington Heights. Very brief. 1/4" Pea Size 1/4" Pea Size Rice Hard|White Ice no damage Continuous False After rain Same time as smaller hail