Station Overview Station Location
Station Number IL-LS-24 Latitude 41.323514
Station Name Ottawa 2.1 SSW Longitude -88.859329
County La Salle Elevation (ft) 617



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 11 2.85 0.92 21 0.92 21 0.00 0 0 5 2 0.0 0 0
Nov 11 3.18 3.55 17 3.55 17 0.00 0 0 6 2 0.0 0 0
Dec 11 2.19 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 12 1.60 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 12 1.53 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 12 2.59 0.67 9 0.67 9 0.00 0 0 4 1 0.0 0 0
April 12 3.28 0.79 10 0.79 10 0.00 0 0 2 3 0.0 0 0
May 12 4.17 4.65 18 4.65 18 0.00 0 0 6 1 0.0 0 0
June 12 3.88 2.16 19 2.16 19 0.00 0 0 2 0 0.0 0 0
July 12 3.98 0.10 16 0.10 16 0.00 0 0 1 2 0.0 0 0
Aug 12 3.83 3.61 25 3.61 25 0.00 0 0 6 1 0.0 0 0
Sept 12 3.27 2.38 28 2.38 28 0.00 0 0 9 1 0.0 0 0
Water Year Totals: 36.35" 18.83" 163 days 18.83" 163 0.00" 0 days 0 41 days 13 days 0.0" 0 days 0 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
10/1/2011 0.00
10/2/2011
10/3/2011 0.00
10/4/2011
10/5/2011 0.00
10/6/2011 0.00
10/7/2011
10/8/2011 0.00
10/9/2011 0.00
10/10/2011
10/11/2011 0.00
10/12/2011 0.05
10/13/2011 0.64
10/14/2011 0.06
10/15/2011
10/16/2011 0.00
10/17/2011 0.00
10/18/2011
10/19/2011
10/20/2011
10/21/2011
10/22/2011 0.00
10/23/2011 0.00
10/24/2011 0.09
10/25/2011 0.00
10/26/2011 0.08
10/27/2011 T
10/28/2011 0.00
10/29/2011 0.00
10/30/2011 T
10/31/2011
11/1/2011 0.00
11/2/2011 0.00
11/3/2011 0.78
11/4/2011 0.19
11/5/2011 0.00
11/6/2011 0.00
11/7/2011 0.01
11/8/2011 1.70
11/9/2011 0.85
11/10/2011 T
11/11/2011 T
11/12/2011 0.00
11/13/2011 0.00
11/14/2011
11/15/2011 0.02
11/16/2011 0.00
11/17/2011
11/18/2011 0.00
11/19/2011 0.00
11/20/2011
11/21/2011
11/22/2011
11/23/2011
11/24/2011
11/25/2011
11/26/2011
11/27/2011
11/28/2011
11/29/2011
11/30/2011
12/1/2011
12/2/2011
12/3/2011
12/4/2011
12/5/2011
12/6/2011
12/7/2011
12/8/2011
12/9/2011
12/10/2011
12/11/2011
12/12/2011
12/13/2011
12/14/2011
12/15/2011
12/16/2011
12/17/2011
12/18/2011
12/19/2011
12/20/2011
12/21/2011
12/22/2011
12/23/2011
12/24/2011
12/25/2011
12/26/2011
12/27/2011
12/28/2011
12/29/2011
12/30/2011
12/31/2011
Day of YearDaily PrcpMultiday Prcp
1/1/2012
1/2/2012
1/3/2012
1/4/2012
1/5/2012
1/6/2012
1/7/2012
1/8/2012
1/9/2012
1/10/2012
1/11/2012
1/12/2012
1/13/2012
1/14/2012
1/15/2012
1/16/2012
1/17/2012
1/18/2012
1/19/2012
1/20/2012
1/21/2012
1/22/2012
1/23/2012
1/24/2012
1/25/2012
1/26/2012
1/27/2012
1/28/2012
1/29/2012
1/30/2012
1/31/2012
2/1/2012
2/2/2012
2/3/2012
2/4/2012
2/5/2012
2/6/2012
2/7/2012
2/8/2012
2/9/2012
2/10/2012
2/11/2012
2/12/2012
2/13/2012
2/14/2012
2/15/2012
2/16/2012
2/17/2012
2/18/2012
2/19/2012
2/20/2012
2/21/2012
2/22/2012
2/23/2012
2/24/2012
2/25/2012
2/26/2012
2/27/2012
2/28/2012
2/29/2012
3/1/2012
3/2/2012
3/3/2012
3/4/2012
3/5/2012
3/6/2012
3/7/2012
3/8/2012
3/9/2012
3/10/2012
3/11/2012
3/12/2012
3/13/2012
3/14/2012
3/15/2012
3/16/2012
3/17/2012
3/18/2012 0.11
3/19/2012 0.33
3/20/2012 0.00
3/21/2012
3/22/2012
3/23/2012 0.22
3/24/2012 0.00
3/25/2012
3/26/2012
3/27/2012 0.00
3/28/2012 0.01
3/29/2012 0.00
3/30/2012
3/31/2012 T
Day of YearDaily PrcpMultiday Prcp
4/1/2012 T
4/2/2012
4/3/2012
4/4/2012
4/5/2012
4/6/2012
4/7/2012
4/8/2012
4/9/2012
4/10/2012
4/11/2012 0.00
4/12/2012 0.00
4/13/2012
4/14/2012
4/15/2012 T
4/16/2012 0.31
4/17/2012
4/18/2012 0.00
4/19/2012
4/20/2012 T
4/21/2012 0.00
4/22/2012
4/23/2012
4/24/2012
4/25/2012
4/26/2012
4/27/2012 0.00
4/28/2012 0.48
4/29/2012
4/30/2012
5/1/2012
5/2/2012 0.67
5/3/2012
5/4/2012 1.58
5/5/2012 T
5/6/2012
5/7/2012 1.80
5/8/2012
5/9/2012
5/10/2012 0.00
5/11/2012
5/12/2012 0.06
5/13/2012 0.00
5/14/2012
5/15/2012 0.00
5/16/2012
5/17/2012 0.00
5/18/2012
5/19/2012 0.00
5/20/2012 0.00
5/21/2012 0.35
5/22/2012 0.00
5/23/2012 0.00
5/24/2012
5/25/2012 0.00
5/26/2012
5/27/2012
5/28/2012
5/29/2012 0.19
5/30/2012 0.00
5/31/2012 0.00
6/1/2012 0.78
6/2/2012
6/3/2012 0.00
6/4/2012
6/5/2012 0.00
6/6/2012 0.00
6/7/2012
6/8/2012 0.00
6/9/2012
6/10/2012 0.00
6/11/2012 0.00
6/12/2012 0.00
6/13/2012 0.00
6/14/2012
6/15/2012
6/16/2012 0.00
6/17/2012 1.38
6/18/2012 0.00
6/19/2012 0.00
6/20/2012
6/21/2012 0.00
6/22/2012 0.00
6/23/2012 0.00
6/24/2012 0.00
6/25/2012
6/26/2012
6/27/2012
6/28/2012 0.00
6/29/2012
6/30/2012 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2012
7/2/2012
7/3/2012
7/4/2012
7/5/2012 0.00
7/6/2012
7/7/2012
7/8/2012
7/9/2012 0.00
7/10/2012
7/11/2012 0.00
7/12/2012
7/13/2012 0.00
7/14/2012 0.00
7/15/2012 0.00
7/16/2012 0.00
7/17/2012 0.00
7/18/2012 0.00
7/19/2012
7/20/2012
7/21/2012 0.00
7/22/2012 0.00
7/23/2012 0.00
7/24/2012 T
7/25/2012
7/26/2012 T
7/27/2012 0.10
7/28/2012
7/29/2012 0.00
7/30/2012
7/31/2012
8/1/2012 0.00
8/2/2012
8/3/2012
8/4/2012 0.00
8/5/2012 0.09
8/6/2012 0.00
8/7/2012 0.00
8/8/2012 0.00
8/9/2012 0.03
8/10/2012 0.35
8/11/2012 0.00
8/12/2012 0.00
8/13/2012 0.00
8/14/2012 0.00
8/15/2012 0.00
8/16/2012 T
8/17/2012 0.73
8/18/2012
8/19/2012 0.00
8/20/2012 0.00
8/21/2012 0.08
8/22/2012 0.00
8/23/2012 0.00
8/24/2012 0.00
8/25/2012 0.00
8/26/2012
8/27/2012 2.33
8/28/2012 0.00
8/29/2012 0.00
8/30/2012
8/31/2012
9/1/2012 0.02
9/2/2012 1.07
9/3/2012
9/4/2012 0.10
9/5/2012 0.11
9/6/2012 0.00
9/7/2012 0.42
9/8/2012 0.17
9/9/2012 0.00
9/10/2012 0.00
9/11/2012 0.00
9/12/2012 0.00
9/13/2012 0.00
9/14/2012 0.34
9/15/2012
9/16/2012 0.00
9/17/2012 0.00
9/18/2012 0.14
9/19/2012 0.00
9/20/2012 0.00
9/21/2012 0.00
9/22/2012 0.01
9/23/2012 0.00
9/24/2012 0.00
9/25/2012 0.00
9/26/2012 T
9/27/2012 0.00
9/28/2012 0.00
9/29/2012 0.00
9/30/2012 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2011 8:00 AM 0.00 0.0 M M M Brrrr... Chilly this morning. But jno rain overnight.
10/3/2011 8:00 AM 0.00 0.0 M M M No pprecip. Not as cold as Sunday. Light winds.
10/5/2011 8:00 AM 0.00 0.0 M M M skunked again. Great day though.
10/6/2011 8:00 AM 0.00 0.0 M M M Bright sun. Not too hot. Little breze.
10/8/2011 8:00 AM 0.00 0.0 M M M Not a drip, not a drop, not a stone.
10/9/2011 8:00 AM 0.00 0.0 M M M nope, nada.
10/11/2011 8:00 AM 0.00 0.0 M M M
10/12/2011 8:00 AM 0.05 M M M M
10/13/2011 8:00 AM 0.64 M M M M What is this wet stuff? Rained all night. Good for the grass.
10/14/2011 8:00 AM 0.06 M M M M
10/16/2011 8:02 AM 0.00 0.0 M M M Just enough to get new deck wet.
10/17/2011 8:00 AM 0.00 0.0 M M M Had to take fence and guage down today, may not be able to report tille friday.
10/22/2011 8:00 AM 0.00 0.0 M M M Back again. Nice Day!
10/23/2011 8:00 AM 0.00 0.0 M M M Remounted guadge to beeter more accessable location. zero for last night.
10/24/2011 8:00 AM 0.09 M M M M Just enough to give my new grass a drink.
10/25/2011 8:00 AM 0.00 0.0 M M M Could hace sworn it reained last night, but no sign of it this morning.
10/26/2011 8:00 AM 0.08 M M M M Very supprised at how little rain, after all of the lightning and thunder. Although, mades me sleep nicely.
10/27/2011 8:00 AM T M M M M Just a trace, Hardly worth reporting. I suspect just heavy dew.
10/28/2011 8:00 AM 0.00 0.0 M M M A nice bright sunny day today.
10/29/2011 8:00 AM 0.00 0.0 M M M Brignt sun todqy. All zero for rain.
10/30/2011 8:00 AM T M M M M Sorry so late, at least it's still today!
11/1/2011 8:00 AM 0.00 0.0 M M M Wow what a day.
11/2/2011 8:00 AM 0.00 0.0 M M M Sunny this morning. Getting overcasrt now.
11/3/2011 8:00 AM 0.78 M M M M Watered new bushes yesterday. Go figure.
11/4/2011 8:00 AM 0.19 M M M M
11/5/2011 8:00 AM 0.00 0.0 M M M Nice sunny day today.
11/6/2011 8:00 AM 0.00 0.0 M M M Windy, Cool, Humid, and Windy.
11/7/2011 8:00 AM 0.01 M M M M Just enoughto get the deck wet. Foggy this morning.
11/8/2011 8:00 AM 1.70 M M M M Heavy mist this morningg, looks like it will continue all day. Just glad it's not snow!!
11/9/2011 8:00 AM 0.85 M M M M Rained on and off all night, now feels like snow! Great,great, great.
11/10/2011 8:00 AM T M M M M Just a trace, probably fell as snow. Great!
11/11/2011 8:00 AM T M M M M Same as yesgterday.
11/12/2011 8:00 AM 0.00 0.0 M M M Nada.
11/13/2011 8:00 AM 0.00 0.0 M M M No rain, but plenty of extraa wind. Almost took door off it' hinges!
11/15/2011 8:00 AM 0.02 M M M M Sorry i'm late, spent day at doctors. all better now.
11/16/2011 8:00 AM 0.00 0.0 M M M Little colder today. But kun kshining.
11/18/2011 8:00 AM 0.00 0.0 M M M Brrrrrrrrrr......
11/19/2011 8:00 AM 0.00 0.0 M M M Brought guage in for the winter. So windy, moved my deck furniture completely accross deck.
3/18/2012 8:00 AM 0.11 M M M M
3/19/2012 11:00 AM 0.33 M M M M
3/20/2012 8:00 AM 0.00 0.0 M M M
3/23/2012 8:00 AM 0.22 M M M M Another nice day.
3/24/2012 8:00 AM 0.00 0.0 M M M Cloudy, Little cooler.
3/27/2012 8:00 AM 0.00 0.0 M M M Looks like we went from winter to sunner then backto spring.
3/28/2012 8:00 AM 0.01 M M M M Nothing to report.
3/29/2012 8:00 AM 0.00 0.0 M M M Cloudy and Cool
3/31/2012 8:00 AM T M M M M Cloudy abd cool.
4/1/2012 8:00 AM T M M M M Could hear rain durring the night.
4/11/2012 8:00 AM 0.00 0.0 M M M Nada.
4/12/2012 8:00 AM 0.00 0.0 M M M Very nice day!
4/15/2012 8:00 AM T M M M M Lots of loghtning and thunder, Not much rain.
4/16/2012 8:00 AM 0.31 M M M M Thought it had rained a lot harder than what was in my guage.
4/18/2012 8:00 AM 0.00 0.0 M M M No rain but nice day.
4/20/2012 8:00 AM T M M M M Probably just heavy dew.
4/21/2012 8:00 AM 0.00 0.0 M M M Cool but sun shining.
4/27/2012 8:00 AM 0.00 0.0 M M M Can't you guys make it rain so I have something to report.
4/28/2012 8:00 AM 0.48 M M M M gOOD SOAKING RAIN.
5/2/2012 8:00 AM 0.67 M M M M Sorry I;m late, too many meetings today.
5/4/2012 8:00 AM 1.58 M M M M Wow, that will make the grass jump out oa the ground!
5/5/2012 8:00 AM T M M M M Hazy today. probably just a heavy dew this morning
5/7/2012 8:00 AM 1.80 M M M M Guage iis a little slippery when that wet.
5/10/2012 8:00 AM 0.00 0.0 M M M Skunked again.
5/12/2012 8:00 AM 0.06 M M M M
5/13/2012 8:00 AM 0.00 0.0 M M M Very nice day.
5/15/2012 8:00 AM 0.00 0.0 M M M Hot today, not a cloud in sight.
5/17/2012 8:00 AM 0.00 0.0 M M M warm, Blue sky, Nice breeze.
5/19/2012 8:00 AM 0.00 0.0 M M M WOW990 degrfees, and not even june.
5/20/2012 8:00 AM 0.00 0.0 M M M Ssrting to look like rain.
5/21/2012 8:00 AM 0.35 M M M M Did not realize it had rained untill I checked my guage.
5/22/2012 8:00 AM 0.00 0.0 M M M No krain, but nice bright day.
5/23/2012 8:00 AM 0.00 0.0 M M M VERY BRIGHT AND WARM.
5/25/2012 8:00 AM 0.00 0.0 M M M Really expected rain last night, but nothing. Hot tooday, No breeeze at all.
5/29/2012 8:00 AM 0.19 M M M M Not much, but at least its something.
5/30/2012 8:00 AM 0.00 0.0 M M M Sorry I'm late, been fighting with my pc all day@
5/31/2012 8:00 AM 0.00 0.0 M M M Started raining between 9 and 10 am.
6/1/2012 8:00 AM 0.78 M M M M Rained aall say yesterday and most of last night.
6/3/2012 8:00 AM 0.00 0.0 M M M Nothing last night, but looks like maybe today.
6/5/2012 8:00 AM 0.00 0.0 M M M Going to need to water ther lawn soon.
6/6/2012 8:00 AM 0.00 0.0 M M M Looks like rain now.
6/8/2012 8:00 AM 0.00 0.0 M M M Hot today, no rain in sight.
6/10/2012 8:00 AM 0.00 0.0 M M M I could really do withyout the heat!
6/11/2012 8:00 AM 0.00 0.0 M M M Looks like it may rain a little today.
6/12/2012 8:00 AM 0.00 0.0 M M M Nice day, but my grass turning brown.
6/13/2012 8:00 AM 0.00 0.0 M M M Cloudy and cooler.
6/16/2012 8:00 AM 0.00 0.0 M M M 90+TODAY. DID SEE A CLOUD THOUGH.
6/17/2012 8:00 AM 1.38 M M M M Love a good storm, lightning and thunder.
6/18/2012 8:00 AM 0.00 0.0 M M M Very warm today.
6/19/2012 8:00 AM 0.00 0.0 M M M Dry and windy.
6/21/2012 8:00 AM 0.00 0.0 M M M nOTHING IN GUAGE. LOOKS LIKE RAIN HOWEVER.
6/22/2012 8:00 AM 0.00 0.0 M M M Little cooler, very nice day.
6/23/2012 8:00 AM 0.00 0.0 M M M Nada.
6/24/2012 8:00 AM 0.00 0.0 M M M Grass turning brown, even bushes look sick.
6/28/2012 8:00 AM 0.00 0.0 M M M A Real scorcher today!!!
6/30/2012 8:54 AM 0.00 0.0 M M M My grass is going to jump right out of the ground.
7/5/2012 8:00 AM 0.00 0.0 M M M I'm melting.
7/9/2012 8:00 AM 0.00 0.0 M M M Should would like to get some rain, Can''t you guys do a rain dance or something?
7/11/2012 8:00 AM 0.00 0.0 M M M Only a wish and a prayer for rain.
7/13/2012 8:00 AM 0.00 0.0 M M M I wish! Not even a bug.
7/14/2012 8:48 AM 0.00 0.0 M M M Man this water sure is wet.
7/15/2012 8:00 AM 0.00 0.0 M M M Hot and Humid today.
7/16/2012 8:00 AM 0.00 0.0 M M M Can't even tell that it rained the other day.
7/17/2012 8:00 AM 0.00 0.0 M M M Might as well be in The Sahara
7/18/2012 8:00 AM 0.00 0.0 M M M You guys have got to be kidding. The next time it rains, i'm going to go outside and sit in it.
7/21/2012 8:00 AM 0.00 0.0 M M M SORRY D THE LAST COUPLE OF RECORD.
7/22/2012 8:00 AM 0.00 0.0 M M M CLOUDY TODAY, LOOKS LIKE RAIN.
7/23/2012 8:00 AM 0.00 0.0 M M M Took dog for a walk, around 10am, no sooner got to end of driveway and it started to raain. Kept right on going.
7/24/2012 8:00 AM T M M M M Cloudy today, hoop it rains.
7/26/2012 8:00 AM T M M M M Trace, just a trace and nothing but a trace.
7/27/2012 8:00 AM 0.10 M M M M
7/29/2012 8:00 AM 0.00 0.0 M M M Much cooler today
8/1/2012 8:00 AM 0.00 0.0 M M M Maybe if I start watering the lown or wash the car it will rain.
8/4/2012 8:00 AM 0.00 0.0 M M M Rain, What's RAIN?
8/5/2012 8:00 AM 0.09 M M M M What was thet wet stuff anyway?
8/6/2012 8:00 AM 0.00 0.0 M M M Nice day, but no rain.
8/7/2012 8:00 AM 0.00 0.0 M M M I've given up on my lawn.
8/8/2012 8:00 AM 0.00 0.0 M M M Couple of dripss of dew.
8/9/2012 8:00 AM 0.03 M M M M Hardly worth the trouble.
8/10/2012 8:00 AM 0.35 M M M M Wow, wet.
8/11/2012 8:00 AM 0.00 0.0 M M M NICE DAY.
8/12/2012 8:00 AM 0.00 0.0 M M M Wife got the car washed the other day, started raining shortly thereafter. is that the secret?
8/13/2012 8:39 AM 0.00 0.0 M M M
8/14/2012 8:14 AM 0.00 0.0 M M M
8/15/2012 8:00 AM 0.00 0.0 M M M Starting radiation tomkorrow, may be intermitttent for a while.
8/16/2012 8:00 AM T M M M M Just starting to rain/thunder.
8/17/2012 8:00 AM 0.73 M M M M This is from day before yesterday. OST 8/19/2012 11:08 AM old date 6/17/1998 -SDH-
8/19/2012 8:00 AM 0.00 0.0 M M M Bright sunny day.
8/20/2012 8:00 AM 0.00 0.0 M M M Nice sunny day, alrhough it feels like rain.
8/21/2012 8:00 AM 0.08 M M M M
8/22/2012 8:00 AM 0.00 0.0 M M M Nada
8/23/2012 8:00 AM 0.00 0.0 M M M Not so mucch as a drop of spit.
8/24/2012 8:00 AM 0.00 0.0 M M M Maybe I should just plant weeds.
8/25/2012 8:00 AM 0.00 0.0 M M M Very hot, but nice breeze.
8/27/2012 8:00 AM 2.33 M M M M Some of my neighbors stood ouside and just stared.
8/28/2012 8:00 AM 0.00 0.0 M M M Very pleasant this morning, but hot this afternoon.
8/29/2012 8:00 AM 0.00 0.0 M M M Hot and dry.
9/1/2012 8:00 AM 0.02 M M M M just starting to rain. looks like a soaker
9/2/2012 8:00 AM 1.07 M M M M Hey, my grass has turned a reallyn strange color. Green.
9/4/2012 8:00 AM 0.10 M M M M
9/5/2012 8:00 AM 0.11 M M M M
9/6/2012 8:00 AM 0.00 0.0 M M M hurts o type, so no more comments unless special.
9/7/2012 8:00 AM 0.42 M M M M
9/8/2012 8:00 AM 0.17 M M M M
9/9/2012 8:00 AM 0.00 0.0 M M M
9/10/2012 8:00 AM 0.00 0.0 M M M
9/11/2012 8:00 AM 0.00 0.0 M M M
9/12/2012 8:00 AM 0.00 0.0 M M M
9/13/2012 8:00 AM 0.00 0.0 M M M
9/14/2012 8:00 AM 0.34 M M M M
9/16/2012 8:00 AM 0.00 0.0 M M M
9/17/2012 8:00 AM 0.00 0.0 M M M
9/18/2012 8:00 AM 0.14 M M M M
9/19/2012 8:00 AM 0.00 0.0 M M M
9/20/2012 8:00 AM 0.00 0.0 M M M
9/21/2012 8:00 AM 0.00 0.0 M M M
9/22/2012 8:00 AM 0.01 M M M M
9/23/2012 8:00 AM 0.00 0.0 M M M
9/24/2012 8:00 AM 0.00 0.0 M M M
9/25/2012 8:00 AM 0.00 0.0 M M M
9/26/2012 8:00 AM T M M M M
9/27/2012 8:00 AM 0.00 0.0 M M M
9/28/2012 8:00 AM 0.00 0.0 M M M
9/29/2012 8:00 AM 0.00 0.0 M M M
9/30/2012 8:00 AM 0.00 0.0 M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes



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