Station Overview Station Location
Station Number IL-CK-87 Latitude 42.082221
Station Name Arlington Heights 1.3 SW Longitude -88.001904
County Cook Elevation (ft) 722



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 09 2.97 6.26 31 3.01 12 3.25 19 8 7 0 0.0 0 0
Nov 09 3.01 1.39 30 1.16 22 0.23 8 3 4 0 0.0 0 0
Dec 09 2.24 5.68 31 1.45 13 4.23 18 5 4 2 0.7 1 3
Jan 10 1.74 1.57 31 0.00 10 1.57 21 5 0 2 0.0 0 1
Feb 10 1.68 1.67 28 1.04 17 0.63 11 3 4 1 14.4 4 3
March 10 2.30 1.81 31 1.27 28 0.54 3 1 5 3 0.0 0 1
April 10 3.42 2.60 30 2.60 30 0.00 0 0 8 1 0.0 0 0
May 10 4.06 5.93 31 5.20 25 0.73 6 1 10 1 0.0 0 0
June 10 4.02 4.94 30 4.08 21 0.86 9 4 13 0 0.0 0 0
July 10 3.83 5.47 31 5.44 23 0.03 8 1 6 2 0.0 0 0
Aug 10 4.50 2.45 31 2.02 25 0.43 6 1 7 0 0.0 0 0
Sept 10 3.40 3.53 30 3.32 28 0.21 2 1 9 1 0.0 0 0
Water Year Totals: 37.17" 43.30" 365 days 30.59" 254 12.71" 111 days 33 77 days 13 days 15.1" 5 days 8 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
10/1/2009 0.00
10/2/2009 0.89
10/3/2009 **
10/4/2009 0.28
10/5/2009 0.00
10/6/2009 **
10/7/2009 0.08
10/8/2009 **
10/9/2009 **
10/10/2009 0.45
10/11/2009 **
10/12/2009 **
10/13/2009 0.03
10/14/2009 0.00
10/15/2009 0.22
10/16/2009 **
10/17/2009 **
10/18/2009 0.37
10/19/2009 0.00
10/20/2009 0.00
10/21/2009 0.04
10/22/2009 **
10/23/2009 1.76
10/24/2009 **
10/25/2009 0.24
10/26/2009 0.34
10/27/2009 0.12
10/28/2009 **
10/29/2009 0.04
10/30/2009 0.98
10/31/2009 0.42
11/1/2009 0.00
11/2/2009 0.02
11/3/2009 0.00
11/4/2009 **
11/5/2009 0.00
11/6/2009 0.00
11/7/2009 0.00
11/8/2009 0.00
11/9/2009 0.00
11/10/2009 0.00
11/11/2009 0.00
11/12/2009 0.00
11/13/2009 0.00
11/14/2009 0.00
11/15/2009 0.00
11/16/2009 0.00
11/17/2009 0.00
11/18/2009 0.13
11/19/2009 **
11/20/2009 **
11/21/2009 **
11/22/2009 0.23
11/23/2009 0.00
11/24/2009 0.00
11/25/2009 0.71
11/26/2009 0.30
11/27/2009 0.00
11/28/2009 **
11/29/2009 T
11/30/2009 0.00
12/1/2009 0.00
12/2/2009 0.00
12/3/2009 T
12/4/2009 **
12/5/2009 T
12/6/2009 0.00
12/7/2009 0.05
12/8/2009 **
12/9/2009 0.55
12/10/2009 **
12/11/2009 0.07
12/12/2009 0.00
12/13/2009 0.04
12/14/2009 T
12/15/2009 0.00
12/16/2009 0.00
12/17/2009 0.00
12/18/2009 **
12/19/2009 0.31
12/20/2009 **
12/21/2009 **
12/22/2009 **
12/23/2009 3.30
12/24/2009 0.38
12/25/2009 0.98
12/26/2009 **
12/27/2009 **
12/28/2009 **
12/29/2009 **
12/30/2009 **
12/31/2009 **
Day of YearDaily PrcpMultiday Prcp
1/1/2010 0.41
1/2/2010 0.00
1/3/2010 0.00
1/4/2010 0.00
1/5/2010 0.00
1/6/2010 T
1/7/2010 **
1/8/2010 0.64
1/9/2010 **
1/10/2010 **
1/11/2010 **
1/12/2010 **
1/13/2010 **
1/14/2010 **
1/15/2010 T
1/16/2010 T
1/17/2010 0.00
1/18/2010 0.00
1/19/2010 0.00
1/20/2010 0.00
1/21/2010 **
1/22/2010 **
1/23/2010 **
1/24/2010 0.49
1/25/2010 **
1/26/2010 0.03
1/27/2010 **
1/28/2010 **
1/29/2010 **
1/30/2010 **
1/31/2010 **
2/1/2010 T
2/2/2010 0.16
2/3/2010 0.00
2/4/2010 **
2/5/2010 **
2/6/2010 **
2/7/2010 0.00
2/8/2010 0.00
2/9/2010 0.21
2/10/2010 0.61
2/11/2010 0.00
2/12/2010 0.00
2/13/2010 0.00
2/14/2010 0.00
2/15/2010 0.00
2/16/2010 0.06
2/17/2010 0.00
2/18/2010 0.00
2/19/2010 0.00
2/20/2010 **
2/21/2010 **
2/22/2010 **
2/23/2010 **
2/24/2010 **
2/25/2010 0.63
2/26/2010 0.00
2/27/2010 T
2/28/2010 0.00
3/1/2010 0.00
3/2/2010 0.00
3/3/2010 0.00
3/4/2010 0.00
3/5/2010 0.00
3/6/2010 0.00
3/7/2010 0.00
3/8/2010 T
3/9/2010 T
3/10/2010 0.15
3/11/2010 T
3/12/2010 0.53
3/13/2010 0.43
3/14/2010 0.12
3/15/2010 0.00
3/16/2010 0.00
3/17/2010 0.00
3/18/2010 0.00
3/19/2010 **
3/20/2010 **
3/21/2010 0.54
3/22/2010 0.00
3/23/2010 0.00
3/24/2010 0.00
3/25/2010 0.04
3/26/2010 0.00
3/27/2010 0.00
3/28/2010 0.00
3/29/2010 0.00
3/30/2010 0.00
3/31/2010 0.00
Day of YearDaily PrcpMultiday Prcp
4/1/2010 0.00
4/2/2010 0.00
4/3/2010 0.12
4/4/2010 0.00
4/5/2010 0.83
4/6/2010 0.92
4/7/2010 0.19
4/8/2010 0.06
4/9/2010 0.00
4/10/2010 0.00
4/11/2010 0.00
4/12/2010 0.00
4/13/2010 0.00
4/14/2010 0.00
4/15/2010 0.00
4/16/2010 0.00
4/17/2010 0.00
4/18/2010 0.00
4/19/2010 0.00
4/20/2010 0.00
4/21/2010 0.00
4/22/2010 0.00
4/23/2010 0.00
4/24/2010 0.26
4/25/2010 0.17
4/26/2010 0.05
4/27/2010 0.00
4/28/2010 0.00
4/29/2010 0.00
4/30/2010 T
5/1/2010 0.15
5/2/2010 1.14
5/3/2010 **
5/4/2010 **
5/5/2010 **
5/6/2010 **
5/7/2010 **
5/8/2010 0.73
5/9/2010 0.00
5/10/2010 0.00
5/11/2010 0.80
5/12/2010 0.33
5/13/2010 2.09
5/14/2010 0.06
5/15/2010 0.00
5/16/2010 0.00
5/17/2010 0.00
5/18/2010 0.02
5/19/2010 0.00
5/20/2010 0.00
5/21/2010 0.29
5/22/2010 0.29
5/23/2010 T
5/24/2010 0.00
5/25/2010 0.00
5/26/2010 0.00
5/27/2010 0.03
5/28/2010 0.00
5/29/2010 0.00
5/30/2010 0.00
5/31/2010 0.00
6/1/2010 0.19
6/2/2010 0.70
6/3/2010 0.18
6/4/2010 **
6/5/2010 **
6/6/2010 0.19
6/7/2010 **
6/8/2010 0.20
6/9/2010 0.57
6/10/2010 0.00
6/11/2010 0.02
6/12/2010 0.00
6/13/2010 **
6/14/2010 0.26
6/15/2010 0.03
6/16/2010 0.20
6/17/2010 0.00
6/18/2010 0.02
6/19/2010 1.00
6/20/2010 0.00
6/21/2010 0.00
6/22/2010 0.02
6/23/2010 0.07
6/24/2010 0.49
6/25/2010 0.00
6/26/2010 0.59
6/27/2010 **
6/28/2010 0.21
6/29/2010 0.00
6/30/2010 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2010 0.00
7/2/2010 0.00
7/3/2010 0.00
7/4/2010 0.00
7/5/2010 T
7/6/2010 0.00
7/7/2010 0.00
7/8/2010 0.28
7/9/2010 0.00
7/10/2010 0.00
7/11/2010 T
7/12/2010 0.36
7/13/2010 0.00
7/14/2010 **
7/15/2010 **
7/16/2010 **
7/17/2010 **
7/18/2010 **
7/19/2010 **
7/20/2010 **
7/21/2010 0.03
7/22/2010 0.02
7/23/2010 0.16
7/24/2010 3.29
7/25/2010 0.00
7/26/2010 0.00
7/27/2010 0.00
7/28/2010 0.00
7/29/2010 0.00
7/30/2010 0.00
7/31/2010 1.33
8/1/2010 0.00
8/2/2010 0.00
8/3/2010 0.31
8/4/2010 0.45
8/5/2010 0.22
8/6/2010 0.00
8/7/2010 0.00
8/8/2010 **
8/9/2010 **
8/10/2010 **
8/11/2010 **
8/12/2010 **
8/13/2010 0.43
8/14/2010 0.17
8/15/2010 0.00
8/16/2010 0.00
8/17/2010 0.00
8/18/2010 0.09
8/19/2010 0.00
8/20/2010 0.00
8/21/2010 0.69
8/22/2010 0.00
8/23/2010 0.00
8/24/2010 0.00
8/25/2010 0.00
8/26/2010 0.00
8/27/2010 0.00
8/28/2010 0.00
8/29/2010 0.00
8/30/2010 0.00
8/31/2010 0.09
9/1/2010 0.41
9/2/2010 0.03
9/3/2010 1.55
9/4/2010 0.00
9/5/2010 0.00
9/6/2010 0.01
9/7/2010 0.00
9/8/2010 0.00
9/9/2010 0.00
9/10/2010 0.00
9/11/2010 0.58
9/12/2010 0.00
9/13/2010 0.00
9/14/2010 0.00
9/15/2010 0.00
9/16/2010 T
9/17/2010 0.17
9/18/2010 **
9/19/2010 0.21
9/20/2010 0.00
9/21/2010 0.04
9/22/2010 0.32
9/23/2010 0.00
9/24/2010 0.21
9/25/2010 0.00
9/26/2010 0.00
9/27/2010 0.00
9/28/2010 0.00
9/29/2010 0.00
9/30/2010 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2009 8:00 AM 0.00 0.0 M M M
10/2/2009 9:10 AM 0.89 M M M M
10/5/2009 7:00 AM 0.00 0.0 M M M
10/14/2009 7:00 AM 0.00 0.0 M M M
10/15/2009 8:05 AM 0.22 0.0 0.00 0.0 0.00
10/19/2009 7:00 AM 0.00 0.0 M M M
10/20/2009 7:00 AM 0.00 0.0 M M M
10/21/2009 8:15 AM 0.04 0.0 0.00 0.0 0.00
10/26/2009 7:31 AM 0.34 0.0 0.00 0.0 0.00
10/27/2009 8:20 AM 0.12 0.0 0.00 0.0 0.00
10/30/2009 8:07 AM 0.98 0.0 0.00 0.0 0.00 Still raining at observation time.
10/31/2009 8:45 AM 0.42 0.0 0.00 0.0 0.00
11/1/2009 9:15 AM 0.00 0.0 0.00 0.0 0.00
11/2/2009 7:00 AM 0.02 0.0 M M M
11/3/2009 8:00 AM 0.00 0.0 0.00 0.0 0.00
11/6/2009 7:00 AM 0.00 0.0 M M M
11/7/2009 7:00 AM 0.00 0.0 M M M
11/8/2009 7:00 AM 0.00 0.0 M M M
11/9/2009 7:00 AM 0.00 0.0 M M M
11/10/2009 7:00 AM 0.00 0.0 M M M
11/11/2009 7:00 AM 0.00 0.0 M M M
11/12/2009 7:00 AM 0.00 0.0 M M M
11/13/2009 7:00 AM 0.00 0.0 M M M
11/14/2009 7:00 AM 0.00 0.0 M M M
11/15/2009 7:00 AM 0.00 0.0 M M M
11/16/2009 7:00 AM 0.00 0.0 M M M
11/17/2009 7:00 AM 0.00 0.0 M M M
11/18/2009 8:07 AM 0.13 0.0 0.00 0.0 0.00
11/23/2009 7:00 AM 0.00 0.0 M M M
11/24/2009 8:30 AM 0.00 0.0 0.00 0.0 0.00
11/25/2009 8:44 AM 0.71 0.0 0.00 0.0 0.00
11/26/2009 9:15 AM 0.30 0.0 0.00 0.0 0.00
11/27/2009 7:00 AM 0.00 0.0 M M M
11/30/2009 7:00 AM 0.00 0.0 M M M
12/1/2009 7:00 AM 0.00 0.0 M M M
12/2/2009 7:00 AM 0.00 0.0 M M M
12/3/2009 10:15 AM T T 0.00 0.0 0.00 Observed light snow falling for the first time this season around 9:45am.
12/6/2009 7:00 AM 0.00 0.0 M M M
12/7/2009 8:15 AM 0.05 0.7 0.05 0.5 0.05 Snowfall depth report is average of multiple measurements.
12/12/2009 7:00 AM 0.00 0.0 M M M
12/13/2009 8:00 AM 0.04 0.0 0.00 1.5 M
12/14/2009 8:10 AM T 0.0 0.00 M M Foggy, very light precipitation in the air, but no accumulation in the gauge at 0810 HRS.
12/15/2009 7:00 AM 0.00 0.0 M M M
12/16/2009 7:00 AM 0.00 0.0 M M M
12/17/2009 7:00 AM 0.00 0.0 M M M
12/24/2009 8:55 AM 0.38 M M M M Report includes melted precipitation that was frozen to the inside of the collection gauge. All outdoor hard surfaces, vegetation, walkways and driveway are coated in ice.
12/25/2009 10:30 AM 0.98 0.0 0.00 2.5 1.15 Measurement was either 0.88 or 0.98, recall is that is was 0.98, but want to note the uncertainty. Total ground snow is an average and was rain-soaked overnight. Core sample was slush.
1/2/2010 9:00 AM 0.00 0.0 0.00 M M
1/3/2010 7:00 AM 0.00 0.0 M M M
1/4/2010 7:00 AM 0.00 0.0 M M M
1/5/2010 7:00 AM 0.00 0.0 M M M
1/6/2010 10:00 AM T T 0.00 2.0 0.39 Very light snow, i.e. just a few flakes, visible at 1000 CST. Core precip measurement is from a snowboard.
1/16/2010 9:30 AM T T M M M Very light snow falling in isolated areas and sticking to roads.
1/17/2010 8:20 AM 0.00 0.0 M M M Observed frost-covered vegetation, drives, walks, and other hard surfaces.
1/18/2010 7:00 AM 0.00 0.0 M M M
1/19/2010 7:00 AM 0.00 0.0 M M M
1/20/2010 7:00 AM 0.00 0.0 M M M
2/2/2010 10:27 AM 0.16 2.3 0.16 2.3 0.16 Measured 2.3" since snow began falling at approx 2300 HRS yesterday (Mon 1 Feb 2010).
2/3/2010 7:00 AM 0.00 0.0 M M M
2/8/2010 7:00 AM 0.00 0.0 M M M
2/9/2010 8:45 AM 0.21 2.3 0.21 M M New snowfall last 24 hours and since storm began: 2.3", melted to 0.21" water.
2/10/2010 8:45 AM 0.61 9.5 0.61 11.8 0.82 Storm total (24-33 hrs duration) was 11.8" snow, 0.82" water equiv.
2/11/2010 7:00 AM 0.00 0.0 M M M
2/12/2010 7:00 AM 0.00 0.0 M M M
2/13/2010 7:00 AM 0.00 0.0 M M M
2/14/2010 7:00 AM 0.00 0.0 M M M
2/15/2010 7:00 AM 0.00 0.0 M M M
2/16/2010 8:20 AM 0.06 0.3 M 6.0 0.92
2/17/2010 9:20 AM 0.00 0.0 M M M
2/18/2010 7:00 AM 0.00 0.0 M M M
2/19/2010 7:00 AM 0.00 0.0 M M M
2/26/2010 7:00 AM 0.00 0.0 M M M
2/27/2010 8:00 AM T T M M M Observed light dusting of snow on the ground which dissipated quickly within a few hours of sunrise.
2/28/2010 7:00 AM 0.00 0.0 M M M
3/1/2010 7:00 AM 0.00 0.0 M M M
3/2/2010 7:00 AM 0.00 0.0 M M M
3/3/2010 7:00 AM 0.00 0.0 M M M
3/4/2010 7:00 AM 0.00 0.0 M M M
3/5/2010 7:00 AM 0.00 0.0 M M M
3/6/2010 7:00 AM 0.00 0.0 M M M
3/7/2010 7:00 AM 0.00 0.0 M M M
3/8/2010 8:10 AM T 0.0 0.00 1.0 0.33 Measured avg of 2.5" snow covering about 40-50% of the ground, for adjusted average measurement of 1.00 - 1.25". Because coverage was less than half, will round down to nearest half-inch of 1" adjusted snow cover. Measured 2.5" core sample precip of 0.83". [Update: Adjusted "Melted value from core" from 0.83 to 0.33 because 0.83 represents the melted equivalent of the full 2.5" core sample, but there was 40-50% ground coverage adjusted to 1.0" of average snow depth resulting in 0.33" (0.83 x 0.40) average water equivalent.
3/9/2010 8:20 AM T 0.0 0.00 M M Not sure if any precipitation fell in last 24 hours. Ground is wet, but may be due to dense fog overnight or thaw.
3/10/2010 8:25 AM 0.15 0.0 0.00 M M
3/11/2010 8:15 AM T 0.0 0.00 0.0 0.00 Observed only a few drops of rain in the gauge at 0815 (1415z), but there is a steady rainfall as this report is being filed at 0950 (1550z). The only snow still on the ground is one large pile in the shade made by the kids. All other snow including large piles at the driveway are melted.
3/12/2010 10:12 AM 0.53 0.0 0.00 M M
3/13/2010 9:30 AM 0.43 0.0 0.00 0.0 0.00
3/14/2010 8:00 AM 0.12 M M M M This was originally reported for 3/15, with no report for 3/14, but later realized the precip was on 3/14 with nothing for 3/15. Edited both reports.
3/15/2010 8:30 AM 0.00 0.0 0.00 0.0 0.00
3/16/2010 8:00 AM 0.00 0.0 0.00 0.0 0.00
3/17/2010 7:00 AM 0.00 0.0 M M M
3/18/2010 7:00 AM 0.00 0.0 M M M
3/22/2010 7:00 AM 0.00 0.0 M M M
3/23/2010 7:00 AM 0.00 0.0 M M M
3/24/2010 8:00 AM 0.00 0.0 0.00 0.0 0.00
3/25/2010 8:00 AM 0.04 0.0 0.00 0.0 0.00 Edited today's "zero precip" report at 13:06CDT/1806z to record slight 0.04" precip found in gauge.
3/26/2010 8:25 AM 0.00 0.0 0.00 0.0 0.00
3/27/2010 8:30 AM 0.00 0.0 0.00 0.0 0.00
3/28/2010 7:00 AM 0.00 0.0 M M M
3/29/2010 8:00 AM 0.00 0.0 0.00 0.0 0.00
3/30/2010 7:00 AM 0.00 0.0 0.00 0.0 0.00 Lawn and roofs are frost-covered at 0700/1200z, bright sun, clear sky, beautiful morning.
3/31/2010 7:00 AM 0.00 0.0 M M M
4/1/2010 7:00 AM 0.00 0.0 M M M
4/2/2010 7:00 AM 0.00 0.0 M M M
4/3/2010 7:15 AM 0.12 0.0 0.00 0.0 0.00
4/4/2010 7:20 AM 0.00 0.0 0.00 0.0 0.00
4/5/2010 7:36 AM 0.83 0.0 0.00 0.0 0.00
4/6/2010 9:10 AM 0.92 0.0 0.00 0.0 0.00
4/7/2010 12:45 PM 0.19 0.0 0.00 0.0 0.00
4/8/2010 8:05 AM 0.06 0.0 0.00 0.0 0.00
4/9/2010 7:00 AM 0.00 0.0 M M M
4/10/2010 7:00 AM 0.00 0.0 M M M
4/11/2010 7:00 AM 0.00 0.0 M M M
4/12/2010 7:00 AM 0.00 0.0 M M M
4/13/2010 7:00 AM 0.00 0.0 M M M
4/14/2010 7:00 AM 0.00 0.0 M M M
4/15/2010 7:00 AM 0.00 0.0 M M M
4/16/2010 7:00 AM 0.00 0.0 M M M
4/17/2010 7:00 AM 0.00 0.0 M M M
4/18/2010 7:00 AM 0.00 0.0 M M M
4/19/2010 7:00 AM 0.00 0.0 M M M
4/20/2010 7:00 AM 0.00 0.0 M M M
4/21/2010 7:00 AM 0.00 0.0 M M M
4/22/2010 7:00 AM 0.00 0.0 M M M
4/23/2010 7:00 AM 0.00 0.0 M M M
4/24/2010 8:15 AM 0.26 0.0 0.00 0.0 0.00
4/25/2010 8:17 AM 0.17 0.0 0.00 0.0 0.00
4/26/2010 7:34 AM 0.05 0.0 0.00 0.0 0.00
4/27/2010 7:00 AM 0.00 0.0 M M M
4/28/2010 7:00 AM 0.00 0.0 M M M
4/29/2010 7:00 AM 0.00 0.0 M M M
4/30/2010 7:45 AM T 0.0 0.00 M M No measured precipitation, but family members reported seeing brief, light precip around 0930CDT/1430z 29 APR and I noticed water spots on the car.
5/1/2010 10:35 AM 0.15 M M M M
5/2/2010 8:57 AM 1.14 0.0 0.00 0.0 0.00
5/9/2010 8:00 AM 0.00 0.0 M M M No measured or observed rainfall at this location, but did observe three or four brief (less than one minute each) episodes of rainfall while running errands five miles away from this location during the day Saturday, 8 May.
5/10/2010 8:10 AM 0.00 0.0 0.00 0.0 0.00
5/11/2010 7:35 AM 0.80 M M M M
5/12/2010 10:18 AM 0.33 0.0 0.00 0.0 0.00
5/13/2010 8:30 AM 2.09 0.0 0.00 0.0 0.00
5/14/2010 7:35 AM 0.06 M M M M
5/15/2010 7:00 AM 0.00 0.0 M M M
5/16/2010 7:00 AM 0.00 0.0 M M M
5/17/2010 8:15 AM 0.00 0.0 0.00 0.0 0.00 No measurable precip at 0815CDT/1315z, but it had just started raining as the measurement was observed.
5/18/2010 8:10 AM 0.02 0.0 0.00 0.0 0.00
5/19/2010 7:00 AM 0.00 0.0 M M M
5/20/2010 7:00 AM 0.00 0.0 M M M
5/21/2010 6:55 AM 0.29 0.0 0.00 0.0 0.00
5/22/2010 9:30 AM 0.29 0.0 0.00 0.0 0.00
5/23/2010 10:45 AM T 0.0 0.00 0.0 0.00 Light rainfall Friday afternoon around 1730 CDT. No measurable accumulation as of 0900 CDT Monday.
5/24/2010 7:40 AM 0.00 0.0 0.00 0.0 0.00
5/25/2010 7:00 AM 0.00 0.0 M M M
5/26/2010 7:00 AM 0.00 0.0 M M M
5/27/2010 6:50 AM 0.03 0.0 0.00 0.0 0.00
5/28/2010 7:00 AM 0.00 0.0 M M M
5/29/2010 7:00 AM 0.00 0.0 M M M
5/30/2010 7:00 AM 0.00 0.0 M M M
5/31/2010 7:00 AM 0.00 0.0 M M M
6/1/2010 7:15 AM 0.19 0.0 0.00 0.0 0.00
6/2/2010 9:00 AM 0.70 0.0 0.00 0.0 0.00
6/3/2010 6:45 AM 0.18 M M M M Made the observation but then could not recall at data entry time if it was 0.13 or 0.23". Splitting the difference for this report based the average of my vague recall and other Arlington Heights observations. Inaccuracy, if any, will be less than 0.05".
6/9/2010 6:50 AM 0.57 0.0 0.00 0.0 0.00
6/10/2010 7:00 AM 0.00 0.0 M M M
6/11/2010 7:45 AM 0.02 0.0 0.00 0.0 0.00
6/12/2010 7:00 AM 0.00 0.0 M M M
6/15/2010 7:55 AM 0.03 0.0 0.00 0.0 0.00
6/16/2010 7:50 AM 0.20 0.0 0.00 0.0 0.00
6/17/2010 7:00 AM 0.00 0.0 M M M
6/18/2010 9:30 AM 0.02 0.0 0.00 0.0 0.00 Noticed partially wet pavement this morning and slight precip (0.02") in gauge.
6/19/2010 5:00 AM 1.00 M M M M Measured 0.60" precip with storm that passed through at 1600/2100z, and 0.40" with storm at 2130/0130z.
6/20/2010 7:00 AM 0.00 0.0 M M M
6/21/2010 7:00 AM 0.00 0.0 M M M
6/22/2010 8:40 AM 0.02 0.0 0.00 0.0 0.00
6/23/2010 8:00 AM 0.07 0.0 0.00 0.0 0.00
6/24/2010 7:50 AM 0.49 0.0 0.00 0.0 0.00
6/25/2010 7:00 AM 0.00 0.0 M M M
6/26/2010 9:34 AM 0.59 0.0 0.00 0.0 0.00
6/29/2010 7:00 AM 0.00 0.0 M M M
6/30/2010 7:00 AM 0.00 0.0 M M M
7/1/2010 7:00 AM 0.00 0.0 M M M
7/2/2010 7:00 AM 0.00 0.0 M M M
7/3/2010 7:00 AM 0.00 0.0 M M M
7/4/2010 7:00 AM 0.00 0.0 M M M
7/5/2010 9:30 AM T 0.0 0.00 0.0 0.00 No measurable precip in the gauge this morning, but family members reported seeing light drizzle for less than five minutes Sunday afternoon.
7/6/2010 7:00 AM 0.00 0.0 M M M
7/7/2010 7:00 AM 0.00 0.0 M M M
7/8/2010 7:23 AM 0.28 0.0 0.00 0.0 0.00
7/9/2010 7:00 AM 0.00 0.0 M M M
7/10/2010 7:00 AM 0.00 0.0 M M M
7/11/2010 8:00 AM T 0.0 0.00 0.0 0.00 Observed very light rainfall around 1730 CDT Saturday afternoon that did not even get the entire car wet and the pavement appeared to be dry. It lasted for just a few minutes.
7/12/2010 7:38 AM 0.36 0.0 0.00 0.0 0.00
7/13/2010 7:00 AM 0.00 0.0 M M M
7/22/2010 8:00 AM 0.02 0.0 0.00 0.0 0.00
7/23/2010 9:04 AM 0.16 0.0 0.00 0.0 0.00 Precipitation fell overnight.
7/24/2010 9:29 AM 3.29 0.0 0.00 0.0 0.00 Most, if not all, of this precipitation fell overnight.
7/25/2010 7:00 AM 0.00 0.0 M M M
7/26/2010 7:00 AM 0.00 0.0 M M M
7/27/2010 7:00 AM 0.00 0.0 M M M
7/28/2010 7:00 AM 0.00 0.0 M M M
7/29/2010 7:00 AM 0.00 0.0 M M M
7/30/2010 7:00 AM 0.00 0.0 M M M
7/31/2010 8:45 AM 1.33 0.0 0.00 0.0 0.00
8/1/2010 7:00 AM 0.00 0.0 M M M
8/2/2010 7:00 AM 0.00 0.0 M M M
8/3/2010 8:00 AM 0.31 0.0 0.00 0.0 0.00
8/4/2010 9:30 AM 0.45 0.0 0.00 0.0 0.00
8/5/2010 8:48 AM 0.22 0.0 0.00 0.0 0.00
8/6/2010 7:00 AM 0.00 0.0 M M M
8/7/2010 7:00 AM 0.00 0.0 M M M
8/14/2010 8:58 AM 0.17 0.0 0.00 0.0 0.00
8/15/2010 7:00 AM 0.00 0.0 M M M
8/16/2010 7:00 AM 0.00 0.0 M M M
8/17/2010 7:00 AM 0.00 0.0 M M M
8/18/2010 7:59 AM 0.09 0.0 0.00 0.0 0.00
8/19/2010 7:00 AM 0.00 0.0 M M M
8/20/2010 7:00 AM 0.00 0.0 M M M
8/21/2010 8:00 AM 0.69 0.0 0.00 0.0 0.00
8/22/2010 7:00 AM 0.00 0.0 M M M
8/23/2010 7:00 AM 0.00 0.0 M M M
8/24/2010 7:00 AM 0.00 0.0 M M M
8/25/2010 7:00 AM 0.00 0.0 M M M
8/26/2010 7:00 AM 0.00 0.0 M M M
8/27/2010 7:00 AM 0.00 0.0 M M M
8/28/2010 7:00 AM 0.00 0.0 M M M
8/29/2010 7:00 AM 0.00 0.0 M M M
8/30/2010 7:00 AM 0.00 0.0 M M M
8/31/2010 7:05 AM 0.09 0.0 0.00 0.0 0.00
9/1/2010 8:08 AM 0.41 0.0 0.00 0.0 0.00
9/2/2010 8:10 AM 0.03 0.0 0.00 0.0 0.00
9/3/2010 7:08 AM 1.55 0.0 0.00 0.0 0.00 Coolest morning in months. First hint that Autumn is in the air. Have noticed some orange and red leaves on on the outer branches of just a very few trees in the last week or so.
9/4/2010 7:00 AM 0.00 0.0 M M M
9/5/2010 7:00 AM 0.00 0.0 M M M
9/6/2010 9:20 AM 0.01 0.0 0.00 0.0 0.00
9/7/2010 7:00 AM 0.00 0.0 M M M
9/8/2010 7:00 AM 0.00 0.0 M M M
9/9/2010 7:00 AM 0.00 0.0 M M M
9/10/2010 6:50 AM 0.00 0.0 0.00 0.0 0.00 The only thing in my rain gauge the last couple of days was a small half-eaten apple that a squirrel left in the funnel.
9/11/2010 12:00 PM 0.58 0.0 0.00 0.0 0.00
9/12/2010 7:00 AM 0.00 0.0 M M M
9/13/2010 7:00 AM 0.00 0.0 M M M
9/14/2010 7:00 AM 0.00 0.0 M M M
9/15/2010 7:00 AM 0.00 0.0 M M M
9/16/2010 8:00 AM T 0.0 0.00 0.0 0.00 No measurable precipitation, but there are raindrop marks on pavement.
9/17/2010 7:50 AM 0.17 0.0 0.00 0.0 0.00
9/20/2010 7:00 AM 0.00 0.0 M M M
9/21/2010 9:00 AM 0.04 0.0 0.00 0.0 0.00
9/22/2010 8:15 AM 0.32 0.0 0.00 0.0 0.00
9/23/2010 7:00 AM 0.00 0.0 M M M
9/24/2010 8:15 AM 0.21 0.0 0.00 0.0 0.00
9/25/2010 9:00 AM 0.00 0.0 0.00 0.0 0.00
9/26/2010 7:00 AM 0.00 0.0 M M M
9/27/2010 7:00 AM 0.00 0.0 M M M
9/28/2010 7:00 AM 0.00 0.0 M M M
9/29/2010 7:00 AM 0.00 0.0 M M M
9/30/2010 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
10/3/2009 10/04/2009 8:38 AM 2 0.28 M M
10/6/2009 10/07/2009 8:33 AM 2 0.08 0.0 0.08
10/8/2009 10/10/2009 9:24 AM 3 0.45 0.0 0.45
10/11/2009 10/13/2009 7:55 AM 3 0.03 0.0 0.03
10/16/2009 10/18/2009 8:47 AM 3 0.37 0.0 0.37
10/22/2009 10/23/2009 8:07 AM 2 1.76 0.0 0.00 Still raining.
10/24/2009 10/25/2009 10:13 AM 2 0.24 0.0 0.00
10/28/2009 10/29/2009 8:34 AM 2 0.04 0.0 0.00
11/4/2009 11/05/2009 8:10 AM 2 0.00 0.0 0.00
11/19/2009 11/22/2009 8:55 AM 4 0.23 0.0 0.00
11/28/2009 11/29/2009 8:00 AM 2 T 0.0 T Observed light rainfall (trace) over the weekend, but any precipitation in the gauge evaporated before the gauge was read on Sunday.
12/4/2009 12/05/2009 8:00 AM 2 T 0.0 0.00 Light covering of snow covered about 50% of ground on morning of 4 Dec, but by the time I was able to take a measurement, the precipitation in the gauge had evaporated.
12/8/2009 12/09/2009 8:45 AM 2 0.55 2.5 0.55 Snow has condensed significantly from its maximum depth yesterday evening by observation only, and what's on the ground is very compact and wet.
12/10/2009 12/11/2009 8:05 AM 2 0.07 M M Unable to get accurate measurement of snow on ground.
12/18/2009 12/19/2009 8:15 AM 2 0.31 3.2 0.31 Light snow still falling. Overnight snow accumulation was 3.2". Snow cover on grass prior to this new snowfall was patchy, about 50% light coverage- not measured.
12/20/2009 12/23/2009 9:15 AM 4 3.30 5.5 0.35
12/26/2009 1/01/2010 8:45 AM 7 0.41 M M
1/7/2010 1/08/2010 9:30 AM 2 0.64 9.5 0.64 30-hr storm totals: 8.7" measured new snow, i.e. 0.64" core precipitation. Total snow on ground 8.5" average. Snow has stopped and wind gusts are starting to blow the snow around. Detail report: First round (3.5" snowfall, i.e. 0.34" core precip; second (overnight) round (5.2" additional, i.e. 0.30 core precip) for totals reported above.
1/9/2010 1/15/2010 9:30 AM 7 T M T
1/21/2010 1/24/2010 10:45 AM 4 0.49 M 0.49 Most, if not all, of this precipitation fell overnight 23 into 24 January 2010.
1/25/2010 1/26/2010 12:58 PM 2 0.03 M 0.03 Any snow that fell overnight was blown off the snowboard. Core precipitation (melted) was 0.03".
1/27/2010 2/01/2010 8:00 AM 6 T M M Observed very light snowfall during this period, but nothing remained on snowboard and any accumulation in collection gauge evaporated.
2/4/2010 2/07/2010 8:00 AM 4 0.00 M 0.00 Little or no snow fell during this multi-day report. No residual moisture in rain gauge; snowboard is dry.
2/20/2010 2/25/2010 12:30 PM 6 0.63 7.8 1.38 Spilled small amount of core precip ground water equiv. Measured core precip amount of 1.38 is accurate +/- 0.20".
3/19/2010 3/21/2010 1:35 PM 3 0.54 M M Did not measure snow depth.
5/3/2010 5/08/2010 10:00 AM 6 0.73 0.0 0.00 Away last week.
6/4/2010 6/06/2010 8:15 AM 3 0.19 0.0 0.00
6/7/2010 6/08/2010 7:26 AM 2 0.20 0.0 0.00
6/13/2010 6/14/2010 7:57 AM 2 0.26 0.0 0.00
6/27/2010 6/28/2010 8:09 AM 2 0.21 0.0 0.00
7/14/2010 7/21/2010 8:27 AM 8 0.03 0.0 0.00
8/8/2010 8/13/2010 8:00 AM 6 0.43 0.0 0.00
9/18/2010 9/19/2010 9:05 AM 2 0.21 0.0 0.00



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