PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) Station: O'HARE Month: April Year: 1999 ================================================================================ TEMPERATURE IN F : :PCPN :SNOW: WIND :SUNSHINE: SKY :PK WND <====================================Columns===================================> -1- -2- -3- -4- -5- -6a/6b- -7- -8- -9- -10- -11- -12-13- -14--15a/15b--16- Day Max Min Avg Dep HDD CDD Wtr Snw Dpth Avg Spd Dir Spd Dir Sun Wx # Tmp Tmp Tmp +/- ( in inches ) ( MPH Degrees ) Min % Code ================================================================================ 1 62 53 58 14 7 0 T 0.0 0 8.0 15 170 18 170 0 0 18 2 75 53 64 20 1 0 T 0.0 0 7.8 14 170 16 170 0 0 81 3 73 52 63 19 2 0 0.00 0.0 0 9.1 20 220 24 200 0 0 18 4 67 44 56 11 9 0 0.12 0.0 0 10.9 23 300 26 290 0 0 1 5 60 40 50 5 15 0 0.06 0.0 0 13.7 26 120 31 120 0 0 18 6 60 45 53 8 12 0 0.04 0.0 0 18.9 33 260 41 260 0 0 1 7 77 33 55 9 10 0 0.00 0.0 0 11.5 29 230 38 240 0 0 18 8 63 47 55 9 10 0 1.35 0.0 0 11.5 24 70 29 60 0 0 13 9 50 40 45 -1 20 0 0.24 0.0 0 16.7 29 40 37 50 0 0 1 10 56 38 47 0 18 0 0.07 0.0 0 16.8 30 100 36 100 0 0 31 11 51 40 46 -1 19 0 0.01 0.0 0 13.0 22 270 26 10 0 0 1 12 56 34 45 -2 20 0 0.00 0.0 0 7.0 16 300 22 290 0 0 8 13 61 38 50 2 15 0 0.00 0.0 0 4.6 13 90 23 70 0 0 18 14 61 36 49 1 16 0 0.00 0.0 0 6.2 15 60 25 50 0 0 0 15 54 44 49 1 16 0 0.98 0.0 0 16.1 31 60 39 50 0 0 1 16 46 42 44 -5 21 0 0.65 0.0 0 14.1 34 20 41 20 0 0 1 17 49 39 44 -5 21 0 T 0.0 0 7.7 17 340 22 30 0 0 0 18 45 38 42 -7 23 0 0.04 0.0 0 3.5 9 260 17 50 0 0 0 19 52 31 42 -8 23 0 0.00 0.0 0 4.6 13 40 22 70 0 0 18 20 56 33 45 -5 20 0 0.24 0.0 0 6.5 15 110 21 70 0 0 12 21 61 46 54 3 11 0 0.37 0.0 0 9.7 28 10 32 360 0 0 183 22 51 44 48 -3 17 0 1.35 0.0 0 11.6 21 50 29 30 0 0 13 23 48 38 43 -8 22 0 0.75 0.0 0 18.5 34 20 45 20 0 0 13 24 53 34 44 -8 21 0 0.00 0.0 0 7.3 15 50 24 50 0 0 0 25 63 33 48 -4 17 0 0.00 0.0 0 5.9 14 70 24 60 0 0 0 26 64 38 51 -1 14 0 0.00 0.0 0 7.6 15 50 23 60 0 0 0 27 53 46 50 -3 15 0 1.23 0.0 0 12.6 18 90 25 80 0 0 1 28 58 44 51 -2 14 0 0.01 0.0 0 M 23 50 28 50 0 0 0 29 62 42 52 -1 13 0 0.00 0.0 0 13.8 23 30 30 50 0 0 0 30 64 38 51 -2 14 0 0.00 0.0 0 8.3 18 70 25 60 0 0 0 ==================================================================================== Avg 58.4 40.8 49.6 ==================================================================================== PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6), Page 2 Station: O'HARE Month: April Year: 1999 ==================================================================================== {Temperature Data} {Precipitation Data} SYMBOLS USED IN COLUMN 16 Average Monthly: 49.6 Total for Month: 7.51 1 = BR Departure: 1.0 Departure: 3.87 2 = FG Highest: 77 on 7 Greatest daily: 1.35 on 8 3 = TS Lowest: 31 on 19 4 = PE {Snowfall, Ice Pellets, Hail} 5 = GR / GS 6 = FZRA / FZDZ Total for Month: 0.0 7 = DU / SS Greatest daily snowfall: 0.0 on 8 = FU / HZ Greatest snowdepth: 0.0 on 9 = BLSN X = FC { No. of Days with } {WEATHER - No. of Days with } { Sunshine Data } Max 32 or below: 0 0.01 inch or more Precip: 16 Total sunshine: 0 Max 90 or above: 0 0.10 inch or more Precip: 10 Sunshine %: 0 Min 32 or below: 1 0.50 inch or more Precip: 6 Min 0 or below: 0 1.00 inch or more Precip: 3 {Heating Degree Days (Base 65) } { Wind data (MPH) } Total this Month: 456 Peak wind: 45 Departure from Normal: -36 Direction: 20 Seasonal Total: 5383 Fastest 2-min wind: 34 Departure from Normal: -883 Direction: 20 Average wind: 10.1 {Cooling Degree Days (Base 65) } { Days of weather } Wx Code 1-8 Hail = 0 Total this Month: 0 Mist =20 Freezing Rain= 0 Departure from Normal: 0 Fog = 1 Dust/Sand = 0 Seasonal Total: 0 Thunder= 5 Smoke/Haze = 9 Departure from Normal: 0 Pellets= 0 Blowing Snow = 0