PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) STATION: WASHINGTON DULLES MONTH: AUGUST YEAR: 2007 LATITUDE: 38 57 N LONGITUDE: 77 27 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 95 64 80 4 0 15 0.00 0.0 0 3.3 15 70 M M 2 25 120 2 95 68 82 6 0 17 0.00 0.0 0 4.0 13 150 M M 1 18 17 130 3 95 72 84 8 0 19 T 0.0 0 4.4 22 210 M M 3 3 28 200 4 98 69 84 8 0 19 0.00 0.0 0 3.6 12 310 M M 2 18 16 310 5 90 73 82 6 0 17 0.01 0.0 0 5.1 26 90 M M 8 18 32 90 6 96 72 84 8 0 19 0.12 0.0 0 5.7 28 70 M M 7 18 70 90 7 97 72 85 9 0 20 0.00 0.0 0 3.9 12 210 M M 4 18 15 220 8 101 79 90 15 0 25 0.00 0.0 0 8.9 20 280 M M 6 8 25 280 9 96 74 85 10 0 20 0.16 0.0 0 5.2 24 30 M M 6 1378 31 30 10 93 73 83 8 0 18 T 0.0 0 7.9 24 300 M M 6 18 32 300 11 89 68 79 4 0 14 0.00 0.0 0 6.2 26 10 M M 4 31 90 12 91 61 76 1 0 11 0.00 0.0 0 2.7 16 300 M M 4 30 210 13 93 68 81 6 0 16 0.00 0.0 0 8.1 20 330 M M 3 8 31 340 14 89 61 75 0 0 10 0.00 0.0 0 3.5 18 30 M M 2 47 180 15 94 63 79 4 0 14 0.00 0.0 0 4.5 12 210 M M 3 15 210 16 94 70 82 7 0 17 0.08 0.0 0 4.4 24 310 M M 6 138 33 300 17 95 71 83 9 0 18 0.05 0.0 0 8.0 21 280 M M 4 138 25 280 18 82 60 71 -3 0 6 0.00 0.0 0 6.2 M M M M 3 M M 19 86 59 73 -1 0 8 0.02 0.0 0 4.9 M 99 M M 8 1 M 99 20 71 62 67 -7 0 2 0.56 0.0 0 4.6 22 80 M M 10 138 29 90 21 70 64 67 -7 0 2 0.49 0.0 0 5.2 14 310 M M 10 18 17 310 22 72 63 68 -6 0 3 T 0.0 0 4.2 9 80 M M 10 18 12 30 23 77 67 72 -2 0 7 T 0.0 0 3.1 9 150 M M 10 18 13 140 24 92 73 83 10 0 18 0.00 0.0 0 6.2 29 210 M M 8 18 M 150 25 97 72 85 12 0 20 0.14 0.0 0 9.1 0 0 M M 4 13 0 0 26 88 71 80 7 0 15 0.04 0.0 0 5.9 59 90 M M 9 1 132 90 27 88 66 77 4 0 12 0.00 0.0 0 4.5 12 350 M M 3 14 30 28 86 65 76 3 0 11 0.00 0.0 0 3.7 12 110 M M 6 8 16 160 29 86 69 78 6 0 13 0.00 0.0 0 5.6 14 190 M M 6 17 200 30 88 69 79 7 0 14 0.00 0.0 0 5.3 13 210 M M 7 16 210 31 88 70 79 7 0 14 0.00 0.0 0 9.1 M M M M 4 8 M M ================================================================================ SM 2772 2108 0 434 1.67 0.0 167.0 M 169 ================================================================================ AV 89.4 68.0 5.4 FASTST PSBL % 5 MAX(MPH) MISC ----> # 59 90 #132 90 ================================================================================ NOTES: # LAST OF SEVERAL OCCURRENCES COLUMN 17 PEAK WIND IN M.P.H. PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2 STATION: WASHINGTON DULLES MONTH: AUGUST YEAR: 2007 LATITUDE: 38 57 N LONGITUDE: 77 27 W [TEMPERATURE DATA] [PRECIPITATION DATA] SYMBOLS USED IN COLUMN 16 AVERAGE MONTHLY: 78.7 TOTAL FOR MONTH: 1.67 1 = FOG OR MIST DPTR FM NORMAL: 4.3 DPTR FM NORMAL: -2.11 2 = FOG REDUCING VISIBILITY HIGHEST: 101 ON 8 GRTST 24HR 0.58 ON 19-20 TO 1/4 MILE OR LESS LOWEST: 59 ON 19 3 = THUNDER SNOW, ICE PELLETS, HAIL 4 = ICE PELLETS TOTAL MONTH: 0.0 INCH 5 = HAIL GRTST 24HR 0.0 6 = FREEZING RAIN OR DRIZZLE GRTST DEPTH: 0 7 = DUSTSTORM OR SANDSTORM: 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: 10 MAX 90 OR ABOVE: 17 0.10 INCH OR MORE: 5 MIN 32 OR BELOW: 0 0.50 INCH OR MORE: 1 MIN 0 OR BELOW: 0 1.00 INCH OR MORE: 0 [HDD (BASE 65) ] TOTAL THIS MO. 0 CLEAR (SCALE 0-3) 8 DPTR FM NORMAL -4 PTCLDY (SCALE 4-7) 17 TOTAL FM JUL 1 0 CLOUDY (SCALE 8-10) 6 DPTR FM NORMAL -5 [CDD (BASE 65) ] TOTAL THIS MO. 434 DPTR FM NORMAL 132 [PRESSURE DATA] TOTAL FM JAN 1 1265 HIGHEST SLP M ON M DPTR FM NORMAL 340 LOWEST SLP 29.74 ON 8 [REMARKS] #FINAL-08-07#