PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) STATION: CHICAGO-OHARE MONTH: APRIL YEAR: 2005 LATITUDE: 41 58 N LONGITUDE: 87 54 W TEMPERATURE IN F: :PCPN: SNOW: WIND :SUNSHINE: SKY :PK WND ================================================================================ 1 2 3 4 5 6A 6B 7 8 9 10 11 12 13 14 15 16 17 18 AVG MX 2MIN DY MAX MIN AVG DEP HDD CDD WTR SNW DPTH SPD SPD DIR MIN PSBL S-S WX SPD DR ================================================================================ 1 56 34 45 2 20 0 0.15 0.0 0 8.0 26 320 M M 8 1 32 320 2 56 30 43 0 22 0 0.03 0.0 0 10.5 23 350 M M 4 1 28 340 3 64 31 48 5 17 0 0.00 0.0 0 6.7 15 100 M M 1 23 70 4 68 36 52 8 13 0 0.00 0.0 0 8.1 22 140 M M 1 M 150 5 76 47 62 18 3 0 0.00 0.0 0 10.8 21 200 M M 6 25 210 6 80 45 63 19 2 0 0.02 0.0 0 8.1 18 30 M M 9 1 26 200 7 54 41 48 3 17 0 0.01 0.0 0 16.6 30 20 M M 6 38 10 8 61 36 49 4 16 0 0.00 0.0 0 7.5 16 80 M M 0 8 30 40 9 68 35 52 6 13 0 0.00 0.0 0 7.6 15 100 M M 6 22 60 10 79 44 62 16 3 0 0.00 0.0 0 9.2 21 110 M M 8 26 70 11 76 53 65 19 0 0 T 0.0 0 16.9 29 130 M M 8 35 110 12 54 42 48 1 17 0 0.63 0.0 0 12.3 21 100 M M 9 1 26 90 13 54 39 47 0 18 0 0.00 0.0 0 15.3 28 20 M M 0 32 20 14 63 33 48 1 17 0 0.00 0.0 0 8.8 16 20 M M 0 25 60 15 63 33 48 0 17 0 0.00 0.0 0 5.9 15 100 M M 2 23 60 16 74 37 56 8 9 0 T 0.0 0 5.0 15 200 M M 7 20 220 17 76 47 62 14 3 0 0.02 0.0 0 6.6 14 70 M M 7 8 21 70 18 83 45 64 15 1 0 0.00 0.0 0 5.4 14 220 M M 3 18 18 240 19 81 60 71 22 0 6 0.00 0.0 0 11.9 21 210 M M 5 30 200 20 70 43 57 8 8 0 T 0.0 0 15.0 25 20 M M 9 138 36 40 21 57 42 50 0 15 0 0.00 0.0 0 10.7 18 70 M M 8 8 25 60 22 46 38 42 -8 23 0 0.67 0.0 0 14.5 30 10 M M 10 1 37 10 23 42 35 39 -11 26 0 T T 0 15.7 25 360 M M 10 33 20 24 54 33 44 -7 21 0 0.00 0.0 0 15.5 26 320 M M 6 31 310 25 67 39 53 2 12 0 T 0.0 0 13.8 25 260 M M 5 36 220 26 57 43 50 -1 15 0 T 0.0 0 11.3 21 300 M M 7 25 280 27 55 40 48 -4 17 0 T 0.0 0 12.9 24 270 M M 8 31 270 28 57 38 48 -4 17 0 T 0.0 0 8.0 16 330 M M 6 8 24 70 29 53 39 46 -7 19 0 0.00 0.0 0 7.3 14 80 M M 9 25 70 30 58 34 46 -7 19 0 0.00 0.0 0 8.3 22 280 M M 5 26 280 ================================================================================ SM 1902 1192 400 6 1.53 T 314.2 M 173 ================================================================================ AV 63.4 39.7 10.5 FASTST PSBL % 6 MAX(MPH) MISC ----> # 30 10 38 10 ================================================================================ NOTES: # LAST OF SEVERAL OCCURRENCES COLUMN 17 PEAK WIND IN M.P.H. PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2 STATION: CHICAGO-OHARE MONTH: APRIL YEAR: 2005 LATITUDE: 41 58 N LONGITUDE: 87 54 W [TEMPERATURE DATA] [PRECIPITATION DATA] SYMBOLS USED IN COLUMN 16 AVERAGE MONTHLY: 51.6 TOTAL FOR MONTH: 1.53 1 = FOG DPTR FM NORMAL: 3.8 DPTR FM NORMAL: -2.15 2 = FOG REDUCING VISIBILITY HIGHEST: 83 ON 18 GRTST 24HR 0.67 ON 22-22 TO 1/4 MILE OR LESS LOWEST: 30 ON 2 3 = THUNDER SNOW, ICE PELLETS, HAIL 4 = ICE PELLETS TOTAL MONTH: T 5 = HAIL GRTST 24HR T ON 23-23 6 = GLAZE OR RIME GRTST DEPTH: 0 7 = BLOWING DUST OR SAND: VSBY 1/2 MILE OR LESS 8 = SMOKE OR HAZE [NO. OF DAYS WITH] [WEATHER - DAYS WITH] 9 = BLOWING SNOW X = TORNADO MAX 32 OR BELOW: 0 0.01 INCH OR MORE: 7 MAX 90 OR ABOVE: 0 0.10 INCH OR MORE: 3 MIN 32 OR BELOW: 2 0.50 INCH OR MORE: 2 MIN 0 OR BELOW: 0 1.00 INCH OR MORE: 0 [HDD (BASE 65) ] TOTAL THIS MO. 400 CLEAR (SCALE 0-3) 7 DPTR FM NORMAL -113 PTCLDY (SCALE 4-7) 12 SEASONAL TOTAL 5652 CLOUDY (SCALE 8-10) 11 DPTR FM NORMAL -565 [CDD (BASE 65) ] TOTAL THIS MO. 6 DPTR FM NORMAL -3 [PRESSURE DATA] SEASONAL TOTAL 7 HIGHEST SLP 30.42 ON 15 DPTR FM NORMAL -3 LOWEST SLP 29.41 ON 25 [REMARKS]