Station Overview Station Location
Station Number IL-CK-156 Latitude 42.103099
Station Name Arlington Heights 0.6 N Longitude -87.981425
County Cook Elevation (ft) 704



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 2.96 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 09 3.01 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 09 2.24 12.75 20 3.86 13 8.89 7 3 6 1 2.7 4 10
Jan 10 1.75 9.19 2 0.00 0 9.19 2 1 0 0 9.2 1 1
Feb 10 1.69 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 10 2.31 0.90 2 0.90 2 0.00 0 0 1 0 0.8 1 1
April 10 3.43 0.00 1 0.00 1 0.00 0 0 0 0 0.0 0 0
May 10 4.06 0.00 4 0.00 4 0.00 0 0 0 0 0.0 0 0
June 10 4.01 0.20 1 0.20 1 0.00 0 0 1 0 0.0 0 0
July 10 3.82 0.30 2 0.30 2 0.00 0 0 1 0 0.0 0 0
Aug 10 4.47 1.20 13 0.55 7 0.65 6 1 2 0 0.0 0 0
Sept 10 3.39 2.57 18 0.69 7 1.88 11 2 2 0 0.0 0 0
Water Year Totals: 37.14" 27.11" 63 days 6.50" 37 20.61" 26 days 7 13 days 1 days 12.7" 6 days 12 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
10/2/2009
10/3/2009
10/4/2009
10/5/2009
10/6/2009
10/7/2009
10/8/2009
10/9/2009
10/10/2009
10/11/2009
10/12/2009
10/13/2009
10/14/2009
10/15/2009
10/16/2009
10/17/2009
10/18/2009
10/19/2009
10/20/2009
10/21/2009
10/22/2009
10/23/2009
10/24/2009
10/25/2009
10/26/2009
10/27/2009
10/28/2009
10/29/2009
10/30/2009
10/31/2009
11/1/2009
11/2/2009
11/3/2009
11/4/2009
11/5/2009
11/6/2009
11/7/2009
11/8/2009
11/9/2009
11/10/2009
11/11/2009
11/12/2009
11/13/2009
11/14/2009
11/15/2009
11/16/2009
11/17/2009
11/18/2009
11/19/2009
11/20/2009
11/21/2009
11/22/2009
11/23/2009
11/24/2009
11/25/2009
11/26/2009
11/27/2009
11/28/2009
11/29/2009
11/30/2009
12/1/2009 0.00
12/2/2009
12/3/2009 T
12/4/2009
12/5/2009 0.09
12/6/2009 0.00
12/7/2009 0.25
12/8/2009 **
12/9/2009 **
12/10/2009 0.00 3.75
12/11/2009
12/12/2009
12/13/2009
12/14/2009
12/15/2009
12/16/2009
12/17/2009
12/18/2009 0.19
12/19/2009 **
12/20/2009 0.00 2.33
12/21/2009 0.00
12/22/2009
12/23/2009 **
12/24/2009 0.90 2.81
12/25/2009 0.30
12/26/2009 2.13
12/27/2009
12/28/2009
12/29/2009
12/30/2009 0.00
12/31/2009
Day of YearDaily PrcpMultiday Prcp
1/1/2010
1/2/2010
1/3/2010
1/4/2010
1/5/2010
1/6/2010
1/7/2010 **
1/8/2010 M 9.19
1/9/2010
1/10/2010
1/11/2010
1/12/2010
1/13/2010
1/14/2010
1/15/2010
1/16/2010
1/17/2010
1/18/2010
1/19/2010
1/20/2010
1/21/2010
1/22/2010
1/23/2010
1/24/2010
1/25/2010
1/26/2010
1/27/2010
1/28/2010
1/29/2010
1/30/2010
1/31/2010
2/1/2010
2/2/2010
2/3/2010
2/4/2010
2/5/2010
2/6/2010
2/7/2010
2/8/2010
2/9/2010
2/10/2010
2/11/2010
2/12/2010
2/13/2010
2/14/2010
2/15/2010
2/16/2010
2/17/2010
2/18/2010
2/19/2010
2/20/2010
2/21/2010
2/22/2010
2/23/2010
2/24/2010
2/25/2010
2/26/2010
2/27/2010
2/28/2010
3/1/2010
3/2/2010
3/3/2010
3/4/2010
3/5/2010
3/6/2010
3/7/2010
3/8/2010
3/9/2010
3/10/2010
3/11/2010
3/12/2010
3/13/2010
3/14/2010
3/15/2010
3/16/2010
3/17/2010
3/18/2010 0.00
3/19/2010
3/20/2010 0.90
3/21/2010
3/22/2010
3/23/2010
3/24/2010
3/25/2010
3/26/2010
3/27/2010
3/28/2010
3/29/2010
3/30/2010
3/31/2010
Day of YearDaily PrcpMultiday Prcp
4/1/2010
4/2/2010
4/3/2010
4/4/2010
4/5/2010
4/6/2010
4/7/2010
4/8/2010
4/9/2010
4/10/2010
4/11/2010
4/12/2010
4/13/2010
4/14/2010
4/15/2010
4/16/2010 0.00
4/17/2010
4/18/2010
4/19/2010
4/20/2010
4/21/2010
4/22/2010
4/23/2010
4/24/2010
4/25/2010
4/26/2010
4/27/2010
4/28/2010
4/29/2010
4/30/2010
5/1/2010
5/2/2010
5/3/2010
5/4/2010
5/5/2010
5/6/2010
5/7/2010
5/8/2010
5/9/2010
5/10/2010
5/11/2010
5/12/2010
5/13/2010
5/14/2010
5/15/2010
5/16/2010 0.00
5/17/2010
5/18/2010
5/19/2010
5/20/2010
5/21/2010
5/22/2010
5/23/2010
5/24/2010
5/25/2010
5/26/2010
5/27/2010
5/28/2010 0.00
5/29/2010 0.00
5/30/2010 0.00
5/31/2010
6/1/2010
6/2/2010
6/3/2010
6/4/2010
6/5/2010
6/6/2010 0.20
6/7/2010
6/8/2010
6/9/2010
6/10/2010
6/11/2010
6/12/2010
6/13/2010
6/14/2010
6/15/2010
6/16/2010
6/17/2010
6/18/2010
6/19/2010
6/20/2010
6/21/2010
6/22/2010
6/23/2010
6/24/2010
6/25/2010
6/26/2010
6/27/2010
6/28/2010
6/29/2010
6/30/2010
Day of YearDaily PrcpMultiday Prcp
7/1/2010
7/2/2010
7/3/2010
7/4/2010
7/5/2010
7/6/2010
7/7/2010
7/8/2010
7/9/2010
7/10/2010
7/11/2010
7/12/2010
7/13/2010
7/14/2010
7/15/2010
7/16/2010
7/17/2010
7/18/2010
7/19/2010
7/20/2010
7/21/2010
7/22/2010
7/23/2010
7/24/2010 0.00
7/25/2010
7/26/2010
7/27/2010
7/28/2010
7/29/2010
7/30/2010
7/31/2010 0.30
8/1/2010
8/2/2010
8/3/2010
8/4/2010
8/5/2010
8/6/2010
8/7/2010
8/8/2010 0.00
8/9/2010
8/10/2010 0.40
8/11/2010
8/12/2010 0.00
8/13/2010
8/14/2010 0.15
8/15/2010 0.00
8/16/2010
8/17/2010
8/18/2010
8/19/2010
8/20/2010 **
8/21/2010 **
8/22/2010 0.00 0.65
8/23/2010
8/24/2010
8/25/2010
8/26/2010
8/27/2010
8/28/2010 0.00
8/29/2010 **
8/30/2010 **
8/31/2010 **
9/1/2010 **
9/2/2010 **
9/3/2010 **
9/4/2010 **
9/5/2010 0.00 1.50
9/6/2010
9/7/2010 0.00
9/8/2010
9/9/2010
9/10/2010
9/11/2010
9/12/2010 0.29
9/13/2010
9/14/2010
9/15/2010
9/16/2010
9/17/2010
9/18/2010 0.40
9/19/2010 0.00
9/20/2010 **
9/21/2010 **
9/22/2010 **
9/23/2010 **
9/24/2010 **
9/25/2010 0.00 0.38
9/26/2010 0.00
9/27/2010
9/28/2010
9/29/2010
9/30/2010



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
12/1/2009 7:00 AM 0.00 0.0 M M M
12/3/2009 1:30 PM T T M M M "THERE WERE "FLURRIES" THAT FELL FROM "8:00 A.M." TO "NOON" + "THEN SOME HEAVIER "LIGHT SNOW" FELL STARTING AT "12:00" + UNTIL I MADE THE "OBSERVATION" AT "1:30" WHEN THE "SNOW WAS STILL FALLING". THE "SNOW" WHEN IT "FELL IN THE "RAIN GAGE" TURNED INTO "LITTLE WATER DROPLETS" THAT WENT UP TO "1/30 OF AN INCH", HOWEVER THE "TEMPERATURE AT "1 P.M." AT "O'HARE" WAS "34" + AND THEREFORE THAT'S WHY I "BELIEVE THE "SNOW "DIDN'T STICK TO THE "CONCRETE" OR THE "GRASS".
12/5/2009 7:50 AM 0.09 0.1 M 0.1 M ****"MOST OF THE "SNOW" IN MY "YARD" HAS "MELTED", ****"THERE'S ONLY A ****"LITTLE BIT ****"BEHIND THE ****"HOUSE AND "GARAGE"****, ****"WELL THE "HIGH" WAS ONLY "25", ****"SO THE SNOW OBVIOUSLY DIDN'T "MELT", ("ALTHOUGH IN THE SUN "YOU'D BE ****"SURPRISED SOME OF THE ****"THINGS THAT CAN HAPPEN", "SNOW CAN "DISAPPEAR AT "TEMPERATURES "BELOW 30"), THE "SNOW EVAPORATED"
12/6/2009 8:36 PM 0.00 0.0 M 0.0 0.09 ****"ALL THE "SNOW" MELTED FROM THE ****"RAIN GAGE"**** + THE ****"YARD"****
12/7/2009 7:17 AM 0.25 0.3 M 0.3 M
12/10/2009 1:02 PM 0.00 0.0 M 4.0 M
12/18/2009 8:30 AM 0.19 0.2 M 1.7 M
12/20/2009 8:05 AM 0.00 0.0 M 4.0 M
12/21/2009 8:39 AM 0.00 0.0 M 4.0 M
12/24/2009 11:03 AM 0.90 M 1.30 6.8 1.19 ****"SEE ****"MULTI-DAY ****"PRECIPTATION REPORT"****
12/25/2009 7:15 AM 0.30 M 0.60 4.0 2.81 ****"2.81 inches of ****"SNOW MELTED"****, ALSO THE ****"9/10 OF AN INCH OF AN INCH OF "ICE" THAT WAS IN THE ****"RAIN GAUGE ALSO MELTED"****
12/26/2009 8:13 AM 2.13 2.1 M 3.9 2.25 ****"WHEN IT WAS ****"RAINING + "WARM" IT ****"MELTED "2 1/4 INCHES OF ****"SNOW"****,****"SO WE WERE "DOWN TO "1 3/4 INCHES" ON THE ****"GROUND"****,BUT ****"THEN "TRAGICALLY" IT ****"STARTED SNOWING AGAIN"**** + AT THE ****"OBSERVATION TIME WE ****"BASICALLY ****"PUT IT ****"ALL BACK"**** AS WE ****"ACCUMULATED ****" 2 1/8 IN. MORE + WE'RE ****"NOW ****"BACK UP TO ****"3 7/8 IN. OF SNOW ON THE ****"GROUND"**** + ****"IT WAS ****"STILL "SNOWING"****
12/30/2009 7:00 AM 0.00 0.0 M 8.0 M ****"AT ****"OBSERVATION TIME"****, THE ****"SNOW ****"HAD "NOT YET STARTED"****, THE "SNOW" ****"JUST "STARTED ****"15 MINUTES ****"AFTER THAT"****,IT WAS ****"JUST "FLURRIES" DURING THE DAY"****, ****"DIDN'T STICK TO ****"HARDLY ****"ANY ACCUMULATION"**** + THEN AT ****"NIGHT "SOMETHING ****"WEIRD HAPPENED"****, WHEN IT ****"GOT DARK"**** + THE ****"CURTAINS CLOSED"**** + ****"I "COULDN'T SEE WHAT WAS GOING ON"****, THE ****"SNOW "APPARENTLY GOT ****"HEAVIER"**** + ****"SNOWED AN ****"ESTMATED TOTAL OF ****"1.2 INCHES"**** + THE ****"SNOW THE "SNOW JUST "STOPPED" + ****"ENDED AT "1:10 A.M." + IT ****"WILL BE ABOUT "2:00 A.M." ****"WHEN THIS ****"REPORT WAS ****"FINALLY ENTERED"**** THAT WAS MY ****"1ST CHANCE TO DO THE ****"REPORT"****, I ****"WILL NOT HAVE "TIME" TO GO ****"OUT THERE + ****"DO A "REPORT" ****"TOMORROW MORNING"****, ****"DUE TO A ****"PROJECT I HAVE TO DO"**** CHARLIE CAHILL
1/8/2010 6:40 AM M 9.2 M 14.0 M
3/18/2010 9:35 PM 0.00 0.0 M 0.0 M
3/20/2010 11:18 AM 0.90 0.8 M 0.9 M
4/16/2010 2:01 AM 0.00 0.0 M M M
5/16/2010 5:31 AM 0.00 0.0 M M M "61","-9","NE9"
5/28/2010 2:23 AM 0.00 0.0 M M M "78","+4","N10"
5/29/2010 3:24 PM 0.00 0.0 M M M "84", +"10","ENE8"
5/30/2010 3:29 PM 0.00 0.0 M M M "89", "+15", "S"
6/6/2010 6:30 PM 0.20 M M M M "NW"
7/24/2010 10:35 PM 0.00 0.0 M M M ****"SADLY "ALL THE ****"RAIN HAD ****"DRIED UP OUT OF THE ****"RAIN GAGE"**** IN ****"CHICAGO THERE WAS VERY BAD ****"FLOODING "UNDERNEATH UNDERPASSES OF ****"EXPRESSWAYS"****, ****"SEVERAL EXPRESSWAYS HAD TO BE ****"CLOSED"**** + IN THE "SOUTHERN SUBURUBS" THERE WAS ****"BAD FLOODING"****,"NO PROBLEM" AT THE ****"OFFICIAL REPORTING SITE, "MY YARD"
7/31/2010 1:50 PM 0.30 M M M M "78","VARIABLE LIGHT 3"
8/8/2010 8:48 AM 0.00 0.0 M M M "83","NORMAL"
8/10/2010 8:35 AM 0.40 M M M M "8/10", "88","+5", "NE 9"
8/12/2010 1:35 PM 0.00 0.0 M M M "91", "+9", "E 10"
8/14/2010 10:13 AM 0.15 M M M M "92", "+"+10", "SSW5", "40 MPH + GUST WITH "THUNDERSTORM FRIDAY NIGHT"
8/15/2010 4:22 PM 0.00 0.0 M M M "83", "+1", "W22"
8/22/2010 4:16 PM 0.00 0.0 M M M
8/28/2010 11:54 PM 0.00 0.0 M M M "88", "+7"
9/5/2010 2:00 PM 0.00 0.0 M M M "EVERYBODY I "KNOW I "HAVEN'T DONE THE "GREATEST JOB" OF "REPORTING TO "COCORAHS", "HOWEVER I "AM A "VERY BUSY MAN", "HOWEVER "WEATHER IS A "VERY IMPORTANT PRIORITY TO ME", IN "FACT I'M "RE-STARTING COLLEGE ON "TUESDAY" + "LIKE ABOUT "10 YEARS DOWN THE ROAD", I "WOULD LIKE TO BE A "METEOROLOGIST" + "BECAUSE I'M "NOW GOING TO "COLLEGE", IT'S "MORE IMPORTANT THAN EVER" THAT I "ADHERE TO A "MORE "CONSISTENT SCHEDULE", "COCORAHS" IS GOING TO BE "PART OF THAT VISION" SO THEREFORE "STARTING TODAY" I'M GOING TO SIT + "PRIORITIZE" WHAT IS "MOST IMPORTANT IN MY LIFE" + I'M GOING TO "MAKE A "CONSISTENT REPORTING SCHEDULE" TO "COCORAHS" AS I "WILL "MAKE "COCORAHS" A "PRIORITY". MY "POSTING SCHEDULE" ON "COCORAHS" WILL BE "TUESDAY", "WEDNESDAY", "FRIDAY", "SATURDAY" + "SUNDAY", DUE TO "OTHER OBLIGATIONS" I "WILL "NOT BE POSTING ON "MONDAY" + "THURSDAY", WE HAD "1.5 INCHES" OF "OLD RAIN" IN THE "RAIN GAGE" FROM A "HUGE RAINSTORM" ON "THURSDAY" (ANY RAIN I MISS I WILL TRY TO WRITE ON IT LATER), "68", "-11" "SINCERELY YOUR "COCORAHS" VOLUNTEER" + "REPORTER",THE LEGEND, CHARLIE CAHILL
9/7/2010 7:30 PM 0.00 0.0 M M M
9/12/2010 12:04 AM 0.29 M M M M "82", "+5", "9/12"
9/18/2010 6:22 PM 0.40 M M M M HI TEMP : "65","-11", WIND : "NNE 5"
9/19/2010 2:30 PM 0.00 0.0 M M M HI TEMP : "67","-8" ("IT'S PRETTY MUCH "3:00" THIS SHOULD BE "ACCURATE"), WIND : "NE 7"
9/25/2010 5:10 PM 0.00 0.0 M M M "60", this was the "WORST DAY" I HAVE SEEN IN A LONG TIME", "TEMPERATURES ARE "-13", A RIDICULOUS "13 DEGREES BELOW NORMAL, THE METEOROLOGISTS COMPLETELY "UNDERESTIMATED THIS "POWERFUL "SEPTEMBER VERSION OF AN "ARCTIC BLAST", THIS AIR CAME RIGHT OUT OF THE ARCTIC + NEEDS TO GO AWAY!, THE "METEOROLOGISTS" MADE A HORRIBLE MISS TODAY BY "7 DEGREES", ("67"), FROM THE ORIGINAL FORECAST, WAAAAA!!!! + THEN WE FELL BACK TO "54" VERY EARLY AT "4:00" AS MOST OF THE DAY WAS IN THE "50'S" + IT'S NOT TOO FAR OFF FROM THAT RIDICULOUS AIR THAT WAS IN "BISMARCK" THE OTHER DAY WITH A "HIGH OF "48"! AND WE WERE MISLED VERY BADLY, THE METEROLOGISTS DO NOT KNOW HOW TO COMMUNICATE THE PEOPLE WATCHING THEIR STATIONS, RRRRR!!!!
9/26/2010 5:20 PM 0.00 0.0 M M M "60","-13", "STILL THOUGH THE "METEOROLOGISTS "BLEW IT AGAIN", IT'S ALWAYS LOWER THAN THEY SAY, IT'S "BEEN A "HORRIBLE WEEKEND", RRRRR!!!!, THE "METEOROLOGIST" ON "ABC7" STILL MISSED BY "3 DEGREES", HE SAID "63" ("ORIGINALLY "67"), "WIND" : "NE 15", ("THIS "LAKE WIND" IS A "BIG PROBLEM"), ("HOWEVER HASN'T THE "LAKE WARMED UP IT SHOULD BE IN THE "70'S", WE SHOULD BE "WARMER THAN THIS"), "ANOTHER PROBLEM IS WE "JUST DIDN'T SEE A 'WHOLE LOT OF SUN TODAY", WAAAA!!!!



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
12/8/2009 12/10/2009 1:02 PM 3 3.75 4.0 M ****"THE "STORM" ****"LASTED FROM "6:00 A.M.", "TUESDAY "12/8" TO "8:00 P.M." "WEDNESDAY "12/9"****
12/19/2009 12/20/2009 8:05 AM 2 2.33 4.0 M ****"2.33 INCHES OF "SNOW" FELL ON "FRIDAY "12/18", ****"AFTER MY ****"REPORT"****
12/23/2009 12/24/2009 11:03 AM 2 2.81 6.8 M ****"THIS IS A ****"VERY COMPLICATED STORM TO ****"REPORT ON"****,****"IT STARTED ABOUT ****"11:00 A.M., "WEDNESDAY "12/23" WITH ****"SLEET PELLETS"****, THEN FROM "1:50" TO "3:00" THERE WAS ****"LIGHT SNOW"**** THEN FROM ****"3:00-4:15 THERE WAS A ****"HEAVY SNOW BURST"****, THEN FROM "4:15 P.M." TO ****"SOMETIME THIS ****"MORNING"**** (WHEN I WAS ASLEEP) THERE WAS "FREEZING RAIN" + ****"SIGNIFICANT ****"ICE ACCUMULATION"****, A ****"SHOCKING "9/10" OF AN "INCH OF "ICE" FELL IN THE ****"RAIN GAGE"****, ****"HOWEVER "I QUESTION THIS ****"NUMBER"**** BECAUSE NO ****METEOROLOGIST ****"FORECASTED THAT ****"MUCH ICE"****, ****"I TOOK A ****"SNOW MEASUREMENT ABOUT "5:45 P.M." + ****"WE HAD AN ****"8 INCH SNOW PACK"****, ****"NOW I DON'T KNOW IF THE ****"HEAVINESS OF THE ICE HIT IT DOWN"****, BUT ****"HAPPILY A ****"2ND SHOCKING THING WAS THAT WE ****"SOMEHOW MELTED 1 3/16 INCHES OF SNOW"**** + NOW ****"WERE DOWN TO "6 13/16 INCHES OF SNOW"**** WITH THIS ****"LIKE "CRUNCHY ****"GRAY COVERING"**** ON TOP OF THE ****"SNOW"**** CHARLIE CAHILL
1/7/2010 1/08/2010 6:40 AM 2 9.19 14.0 M ****"STORM "STARTED "1/7" AT "2:00 A.M." + ****"ENDED "1/8" AT "6:15 A.M."****
8/20/2010 8/22/2010 4:16 PM 3 0.65 M M THIS ****"RAIN"****, A ****"DECENT TOTAL"****, FELL ON ****"FRIDAY NIGHT"**** WITH ****"THUNDERSTORMS"****, I'VE ****"BEEN "REAL BUSY" I HAVEN'T ****"HAD TIME TO ****"CHECK THE ****"RAIN GAGE LATELY"**** CHARLIE CAHILL
8/29/2010 9/05/2010 2:00 PM 8 1.50 M M THE "MAJOR PRECIPITATION OCCURED BETWEEN "9:00"-"9:20" "THURSDAY NIGHT "9/2", ****"HOWEVER IT "RAINED FROM "9:00 P.M."-"12:00 A.M." "9/3"
9/20/2010 9/25/2010 5:10 PM 6 0.38 M M on "THURSDAY", "9/23", THERE WAS "0.38 IN." OF "RAIN" CHARLIE CAHILL



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