Station Overview Station Location
Station Number IL-WL-42 Latitude 41.53134
Station Name Mokena 1.3 W Longitude -87.901152
County Will Elevation (ft) 715



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 12 3.10 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 12 3.31 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 12 2.35 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 13 1.86 3.38 30 3.38 30 0.00 0 0 9 3 0.9 3 4
Feb 13 1.73 2.40 26 2.40 26 0.00 0 0 11 6 7.6 6 13
March 13 2.45 1.49 25 1.49 25 0.00 0 0 10 4 10.0 3 7
April 13 3.61 7.95 26 6.29 18 1.66 8 3 9 2 0.0 0 0
May 13 4.24 5.28 12 2.13 2 3.15 10 2 2 0 0.0 0 0
June 13 4.24 2.74 2 2.25 1 0.49 1 1 1 0 0.0 0 0
July 13 4.17 0.48 3 0.00 0 0.48 3 1 0 0 0.0 0 0
Aug 13 4.11 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Sept 13 3.22 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 38.39" 23.72" 124 days 17.94" 102 5.78" 22 days 7 42 days 15 days 18.5" 12 days 24 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
10/1/2012
10/2/2012
10/3/2012
10/4/2012
10/5/2012
10/6/2012
10/7/2012
10/8/2012
10/9/2012
10/10/2012
10/11/2012
10/12/2012
10/13/2012
10/14/2012
10/15/2012
10/16/2012
10/17/2012
10/18/2012
10/19/2012
10/20/2012
10/21/2012
10/22/2012
10/23/2012
10/24/2012
10/25/2012
10/26/2012
10/27/2012
10/28/2012
10/29/2012
10/30/2012
10/31/2012
11/1/2012
11/2/2012
11/3/2012
11/4/2012
11/5/2012
11/6/2012
11/7/2012
11/8/2012
11/9/2012
11/10/2012
11/11/2012
11/12/2012
11/13/2012
11/14/2012
11/15/2012
11/16/2012
11/17/2012
11/18/2012
11/19/2012
11/20/2012
11/21/2012
11/22/2012
11/23/2012
11/24/2012
11/25/2012
11/26/2012
11/27/2012
11/28/2012
11/29/2012
11/30/2012
12/1/2012
12/2/2012
12/3/2012
12/4/2012
12/5/2012
12/6/2012
12/7/2012
12/8/2012
12/9/2012
12/10/2012
12/11/2012
12/12/2012
12/13/2012
12/14/2012
12/15/2012
12/16/2012
12/17/2012
12/18/2012
12/19/2012
12/20/2012
12/21/2012
12/22/2012
12/23/2012
12/24/2012
12/25/2012
12/26/2012
12/27/2012
12/28/2012
12/29/2012
12/30/2012
12/31/2012
Day of YearDaily PrcpMultiday Prcp
1/1/2013 0.00
1/2/2013 0.00
1/3/2013 0.00
1/4/2013 0.00
1/5/2013 0.00
1/6/2013
1/7/2013 0.00
1/8/2013 0.00
1/9/2013 0.00
1/10/2013 0.00
1/11/2013 0.78
1/12/2013 0.02
1/13/2013 0.12
1/14/2013 T
1/15/2013 0.00
1/16/2013 0.00
1/17/2013 T
1/18/2013 0.00
1/19/2013 0.00
1/20/2013 0.00
1/21/2013 0.02
1/22/2013 0.00
1/23/2013 0.00
1/24/2013 T
1/25/2013 0.06
1/26/2013 0.00
1/27/2013 0.00
1/28/2013 0.18
1/29/2013 0.54
1/30/2013 1.50
1/31/2013 0.16
2/1/2013 T
2/2/2013 0.11
2/3/2013 0.03
2/4/2013 0.04
2/5/2013 T
2/6/2013 T
2/7/2013 0.03
2/8/2013 0.59
2/9/2013 0.00
2/10/2013 0.01
2/11/2013 0.24
2/12/2013 0.00
2/13/2013 0.00
2/14/2013 0.00
2/15/2013 T
2/16/2013 0.00
2/17/2013 0.00
2/18/2013 0.00
2/19/2013 0.28
2/20/2013 T
2/21/2013
2/22/2013 0.37
2/23/2013 T
2/24/2013
2/25/2013 0.00
2/26/2013 0.00
2/27/2013 0.63
2/28/2013 0.07
3/1/2013 T
3/2/2013
3/3/2013
3/4/2013 0.00
3/5/2013 0.02
3/6/2013 0.65
3/7/2013 0.00
3/8/2013 0.00
3/9/2013
3/10/2013
3/11/2013 0.47
3/12/2013 0.07
3/13/2013
3/14/2013 0.00
3/15/2013 0.01
3/16/2013 0.04
3/17/2013 T
3/18/2013 0.02
3/19/2013 0.04
3/20/2013 0.00
3/21/2013 T
3/22/2013 0.00
3/23/2013 0.00
3/24/2013 0.00
3/25/2013 0.13
3/26/2013 T
3/27/2013 0.00
3/28/2013
3/29/2013 0.00
3/30/2013 0.00
3/31/2013 0.04
Day of YearDaily PrcpMultiday Prcp
4/1/2013 0.00
4/2/2013 0.00
4/3/2013 0.00
4/4/2013 0.00
4/5/2013 0.00
4/6/2013 **
4/7/2013 **
4/8/2013 0.72
4/9/2013 0.16
4/10/2013 0.04
4/11/2013 1.08
4/12/2013 **
4/13/2013 **
4/14/2013 0.09
4/15/2013 T
4/16/2013 0.56
4/17/2013 0.06
4/18/2013 3.31
4/19/2013 0.98
4/20/2013 0.03
4/21/2013 0.00
4/22/2013 0.00
4/23/2013 **
4/24/2013 0.85
4/25/2013
4/26/2013
4/27/2013
4/28/2013 0.07
4/29/2013 T
4/30/2013
5/1/2013
5/2/2013
5/3/2013
5/4/2013
5/5/2013
5/6/2013
5/7/2013
5/8/2013
5/9/2013
5/10/2013
5/11/2013
5/12/2013
5/13/2013
5/14/2013
5/15/2013
5/16/2013
5/17/2013
5/18/2013
5/19/2013
5/20/2013
5/21/2013 1.29
5/22/2013 **
5/23/2013 **
5/24/2013 **
5/25/2013 **
5/26/2013 **
5/27/2013 **
5/28/2013 1.40
5/29/2013 0.84
5/30/2013 **
5/31/2013 **
6/1/2013 0.49
6/2/2013
6/3/2013
6/4/2013
6/5/2013
6/6/2013
6/7/2013
6/8/2013
6/9/2013
6/10/2013
6/11/2013
6/12/2013
6/13/2013 2.25
6/14/2013
6/15/2013
6/16/2013
6/17/2013
6/18/2013
6/19/2013
6/20/2013
6/21/2013
6/22/2013
6/23/2013
6/24/2013
6/25/2013
6/26/2013
6/27/2013
6/28/2013
6/29/2013
6/30/2013
Day of YearDaily PrcpMultiday Prcp
7/1/2013
7/2/2013
7/3/2013
7/4/2013
7/5/2013
7/6/2013
7/7/2013 **
7/8/2013 **
7/9/2013 0.48
7/10/2013
7/11/2013
7/12/2013
7/13/2013
7/14/2013
7/15/2013
7/16/2013
7/17/2013
7/18/2013
7/19/2013
7/20/2013
7/21/2013
7/22/2013
7/23/2013
7/24/2013
7/25/2013
7/26/2013
7/27/2013
7/28/2013
7/29/2013
7/30/2013
7/31/2013
8/1/2013
8/2/2013
8/3/2013
8/4/2013
8/5/2013
8/6/2013
8/7/2013
8/8/2013
8/9/2013
8/10/2013
8/11/2013
8/12/2013
8/13/2013
8/14/2013
8/15/2013
8/16/2013
8/17/2013
8/18/2013
8/19/2013
8/20/2013
8/21/2013
8/22/2013
8/23/2013
8/24/2013
8/25/2013
8/26/2013
8/27/2013
8/28/2013
8/29/2013
8/30/2013
8/31/2013
9/1/2013
9/2/2013
9/3/2013
9/4/2013
9/5/2013
9/6/2013
9/7/2013
9/8/2013
9/9/2013
9/10/2013
9/11/2013
9/12/2013
9/13/2013
9/14/2013
9/15/2013
9/16/2013
9/17/2013
9/18/2013
9/19/2013
9/20/2013
9/21/2013
9/22/2013
9/23/2013
9/24/2013
9/25/2013
9/26/2013
9/27/2013
9/28/2013
9/29/2013
9/30/2013



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
1/1/2013 5:30 PM 0.00 0.0 M M M
1/2/2013 7:00 AM 0.00 0.0 M M M
1/3/2013 8:15 AM 0.00 0.0 M M M
1/4/2013 8:15 AM 0.00 0.0 M M M
1/5/2013 7:35 AM 0.00 0.0 M M M
1/7/2013 7:00 AM 0.00 0.0 M M M
1/8/2013 7:00 AM 0.00 0.0 M M M Not much frost on the foliage this morning. 26 degrees and cloudy here.
1/9/2013 7:00 AM 0.00 0.0 M M M Normally, walking out to my rain gauge in January feels like walking across the Siberian frozen tundra. It is actually a pleasant morning here, with early morning temps already at 34 degrees and the sun beginning to make an appearance on the horizon.
1/10/2013 6:20 AM 0.00 0.0 M M M It's a little chillier out there this morning compared to yesterday, only 26 degrees. Nothing a warm cup of coffee won't fix, and can't complain knowing there's a major warmup around the corner tomorrow.
1/11/2013 7:00 AM 0.78 M M M M Still drizzling. With a temp of 53 already this morning and some much-needed rain, I wouldn't be surprised to see an early spring flower or two start peeking out (before its dreams are crushed when winter shows up later this weekend). It even smells like spring out there this morning.
1/12/2013 7:05 AM 0.02 M M M M
1/13/2013 7:03 AM 0.12 M M M M Rain began Saturday night at 7:35pm. I went to bed at 11:30pm and as of that time, we still had only rain and not freezing rain or snow. Woke up at 6:50am to find a glaze of ice on everything, including the rain gauge. I don't see evidence of any snow falling overnight.
1/14/2013 7:00 AM T M M M M Had two short instances of precipitation Sunday, once at approximately 1:30pm and one last evening between 8-9pm. Both resulted in a very brief dusting of snow appearing only on the coldest surfaces (concrete, stainless steel grill, vehicles). This morning there is still a glaze of ice on the same surfaces mentioned above. It definitely feels like winter this morning...quite a change from last week.
1/15/2013 5:50 AM 0.00 0.0 M M M
1/16/2013 6:03 AM 0.00 0.0 M M M It's another brisk morning, but nothing like what's forecast for early next week. Crazy to think that less than a week ago it was in the 50s, warm enough to open the windows for a bit to let some fresh air into the house. Definitely won't be doing that again anytime soon. Hardcore winter temps are on the horizon but it seems measurable snow will continue to elude us around here.
1/17/2013 6:20 AM T M M M M Saw snowflakes coming down in the late afternoon/early evening Wednesday, but only for a short while and nothing stayed on the ground to even constitute calling it a dusting. The grass is still crunchy under my feet this morning, although at 26 degrees it's slightly warmer than it's been in the morning all week. Looking forward to seeing the 40s again tomorrow and Saturday before the temps bottom out early next week.
1/18/2013 7:00 AM 0.00 0.0 M M M It's a brisk 20 degrees in Mokena this morning and I'm looking forward to the warmup into the 40s later today and tomorrow. I only wish it would be for a longer duration before the temps bottom out and we have the coldest temps of the season Monday.
1/19/2013 7:00 AM 0.00 0.0 M M M 35 degrees this morning, first one above freezing in several days.
1/20/2013 7:00 AM 0.00 0.0 M M M
1/21/2013 9:03 AM 0.02 0.2 M M M Not to be snappy, but really, the ONE morning I'm able to sleep in, there's snow on the ground when I wake up and I missed it? Figures! Definitely a major temp change out there today. It's 9:37 and only 7 degrees, with a windchill of -4.
1/22/2013 7:00 AM 0.00 0.0 M T M When I went out to check the gauge, I actually heard two different neighbors curse loudly at the cold as they came outside to warm up their cars. Don't blame them - it is 0 with a -15 windchill here this morning. It's been quite awhile since we have experienced temps even close to this cold.
1/23/2013 7:00 AM 0.00 0.0 M T M It's a heat wave...12 degrees here in Mokena this morning.
1/24/2013 6:38 AM T M M M M Light flurries fell throughout the day yesterday, from mid-morning to mid-afternoon. However, none of it stayed on the ground and there was nothing in the gauge or on the snow board this morning. The few patches of snow already on the ground from snow over the weekend appear the same or even less than yesterday. It was like being in a snowglobe that had been shaken up...snowflakes floating all around us yesterday but nothing ever settled on the ground, at least not in Mokena. Friends in Oak Lawn and Des Plaines shared pictures of measurable snow last night, as additional snow bands moved through north of my location around 9pm.
1/25/2013 7:00 AM 0.06 0.4 M 0.5 M Light snow was still falling when I woke up at 5:30 and it stopped at approximately 6:30. Dusting on grass with patches of grass still visible, .4 depth on snow board.
1/26/2013 8:30 AM 0.00 0.0 M 0.5 M Total snow on ground is actually .3 this morning; put .5 since it says to round to nearest half inch. Yesterday's snow ended at approximately 6:30am, so no new snow has fallen since yesterday morning's 7am report.
1/27/2013 7:13 AM 0.00 0.0 M 0.2 M No new precipitation in the past 24 hours. Remaining snow on snowboard is down to .2 this morning.
1/28/2013 7:00 AM 0.18 M M M M Precipitation began as sleet at 1:55pm on Sunday. It switched over to freezing rain at 3pm. There was a thin glaze of ice on roads and walkways by late afternoon but I didn't get a measurement of ice depth. The rain and warm temps (47 already this morning) have completely melted the ice and the remainders of last week's snow, which was still visible in patchy spots Sunday morning. No ice was on the rain gauge this morning; measurement of .18 was all liquid with no melting necessary.
1/29/2013 7:00 AM 0.54 M M M M 57 degrees already at 7 am!
1/30/2013 7:00 AM 1.50 M M M M Currently drizzling and 38 degrees. Remember to bring your inner measurement cylinder inside again, if you used it during our burst of spring yesterday.
1/31/2013 7:00 AM 0.16 0.3 M 0.3 M We had rain yesterday morning that ended at approximately 10:30am. Then snow occurred off and on throughout the evening, beginning at approximately 4pm. Still snowing now, light flurries. Temp is a brisk 16 degrees.
2/1/2013 7:00 AM T T M 0.2 M Flurries on and off all day yesterday but nothing seemed to stick.
2/2/2013 7:50 AM 0.11 1.3 M 1.4 M Snow began Friday night between 9-9:30pm. Headed to bed at 2am and it was still coming down lightly.
2/3/2013 7:20 AM 0.03 0.4 M 1.7 M Snowing steadily at observation time.
2/4/2013 7:00 AM 0.04 0.3 M 2.0 M
2/5/2013 7:00 AM T T M 1.9 M Observed light snow yesterday but nothing in the gauge this morning.
2/6/2013 7:00 AM T T M 1.7 M Brief period of light snow Tuesday afternoon approximately 2:30-4pm. Nothing in the rain gauge or on the snow board.
2/7/2013 7:00 AM 0.03 M M 0.4 M Lots of melting has occurred; only a half inch of snow left on the snow board and patches of grass are now visible in the yard. Roads and sidewalks were slick in spots this morning at 6am when I was out, and the car had ice glaze on it.
2/8/2013 7:00 AM 0.59 T M T M Mostly rain on Thursday; switched to a mix and then snow at approximately 7:30 but only lasted an hour or so. A few small patches of snow remain in the yard but 75% grass is visible.
2/9/2013 7:48 AM 0.00 0.0 M T M
2/10/2013 7:08 AM 0.01 M M T M
2/11/2013 7:00 AM 0.24 M M M M
2/12/2013 7:00 AM 0.00 0.0 M M M
2/13/2013 6:22 AM 0.00 0.0 M M M
2/14/2013 7:00 AM 0.00 0.0 M M M
2/15/2013 8:35 AM T M M M M Nothing in gauge, just a trace of snow on concrete.
2/16/2013 7:00 AM 0.00 0.0 M M M
2/17/2013 7:00 AM 0.00 0.0 M M M
2/18/2013 7:00 AM 0.00 0.0 M M M
2/19/2013 7:00 AM 0.28 T M T M Rain began in mid-afternoon Monday, with a changeover to snow sometime between 9-11pm. No measurable snow on snowboard at 7am observation but traces are visible on grass and concrete surfaces. No surfaces are completely covered though. Light flurries still falling, very windy conditions with gusts measured up to 37mph.
2/20/2013 8:30 AM T T M T M Nothing in the gauge and amount of patchy snow has lessened quite a bit since yesterday. Putting a "T" because I did see light flurries yesterday between 7-9am.
2/22/2013 6:20 AM 0.37 2.7 M 2.7 M
2/23/2013 7:35 AM T T M 2.2 M
2/25/2013 7:00 AM 0.00 0.0 M 1.3 M
2/26/2013 7:00 AM 0.00 0.0 M 0.3 M Significant melting occurred Monday with temps in the mid 40s and the bright February sun gracing us with its presence all day. Grass is about 50% covered and .3" depth is the average of what's left on snowboards.
2/27/2013 7:00 AM 0.63 2.3 M 2.6 M Tuesday: Precipitation began as sleet at 9am, switched to a sleet/rain mix at 10am, then a snow/sleet mix by 11:30am. It was all snow by 12:15pm. Flurries continued throughout the day with a brief lull in the mid afternoon and again in early evening. 2.0" of new snow fell with this event in the 8 hour period between 11:30am and 7:30pm. Additional .3" occurred between 7:30pm Tuesday night and 7:00am Wednesday morning.
2/28/2013 7:00 AM 0.07 0.6 M 2.4 M
3/1/2013 7:10 AM T T M 1.0 M
3/4/2013 6:48 AM 0.00 0.0 M 1.0 0.31 Averaged snow depth used for SWE measurement was .8, rounded up to nearest half inch of 1.0.
3/5/2013 6:55 AM 0.02 0.1 M 0.4 M Mix of sleet and snow coming down at obs time.
3/6/2013 6:35 AM 0.65 8.7 1.06 9.0 1.07
3/7/2013 7:00 AM 0.00 0.0 M 7.5 M
3/8/2013 6:40 AM 0.00 0.0 M 5.0 M
3/11/2013 7:00 AM 0.47 0.0 M T M
3/12/2013 7:10 AM 0.07 T M T M Light rain occurred off and on throughout the day on Monday. In the late afternoon, there was a short period of snow but there was no accumulation and no evidence of it remains this morning.
3/14/2013 8:40 AM 0.00 0.0 M T M
3/15/2013 7:20 AM 0.01 T M M M A light, wet snow fell yesterday in the early to mid afternoon, but nothing stuck. Roadways and grass were just wet with no evidence of the evil white stuff.
3/16/2013 9:02 AM 0.04 M M M M
3/17/2013 7:26 AM T M M M M Nothing in the gauge but I observed light misty rain Saturday morning.
3/18/2013 7:00 AM 0.02 M M M M Frozen liquid in gauge. Currently observing freezing rain here. Ice accumulation on vehicles and pavement is slick.
3/19/2013 6:15 AM 0.04 T M M M No snow on the ground, just observed snow falling late in the afternoon after freezing rain earlier in the day.
3/20/2013 8:30 AM 0.00 0.0 M M M
3/21/2013 7:00 AM T T M T M
3/22/2013 7:00 AM 0.00 0.0 M M M
3/23/2013 7:00 AM 0.00 0.0 M M M
3/24/2013 7:00 AM 0.00 0.0 M M M
3/25/2013 7:00 AM 0.13 1.2 0.12 1.2 0.12
3/26/2013 7:00 AM T T M T M
3/27/2013 6:44 AM 0.00 0.0 M M M
3/29/2013 8:00 AM 0.00 0.0 M M M
3/30/2013 7:00 AM 0.00 0.0 M M M
3/31/2013 9:40 AM 0.04 M M M M
4/1/2013 8:00 AM 0.00 0.0 M M M
4/2/2013 8:25 AM 0.00 0.0 M M M
4/3/2013 8:00 AM 0.00 0.0 M M M
4/4/2013 6:40 AM 0.00 0.0 M M M
4/5/2013 7:00 AM 0.00 0.0 M M M
4/9/2013 6:52 AM 0.16 M M M M
4/10/2013 7:00 AM 0.04 M M M M
4/11/2013 9:28 AM 1.08 M M M M
4/15/2013 6:50 AM T M M M M
4/16/2013 7:00 AM 0.56 M M M M
4/17/2013 7:00 AM 0.06 0.0 M M M
4/18/2013 6:30 AM 3.31 M M M M
4/19/2013 7:00 AM 0.98 M M M M
4/20/2013 11:20 AM 0.03 T M M M Observed graupel yesterday in the late morning/early afternoon, and snow later in the day.
4/21/2013 3:30 PM 0.00 0.0 M M M
4/22/2013 5:52 AM 0.00 0.0 M M M
4/28/2013 7:35 AM 0.07 M M M M
4/29/2013 5:45 AM T M M M M
5/21/2013 6:00 AM 1.29 M M M M
5/29/2013 6:50 AM 0.84 M M M M
6/13/2013 7:10 AM 2.25 M M M M Flash flooding on roadways between 6-7pm



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
4/6/2013 4/08/2013 6:30 AM 3 0.72 0.0 0.00
4/12/2013 4/14/2013 11:50 AM 3 0.09 M M
4/23/2013 4/24/2013 6:45 AM 2 0.85 M M
5/22/2013 5/23/2013 6:45 AM 2 1.75 M M
5/23/2013 5/28/2013 6:00 AM 6 1.40 M M
5/30/2013 6/01/2013 12:00 AM 3 0.49 M M
7/7/2013 7/09/2013 7:10 AM 3 0.48 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