PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) STATION: WASHINGTON DULLES MONTH: AUGUST YEAR: 2004 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 87 72 80 4 0 15 0.43 0.0 0 3.1 10 200 641 M 9 138 14 150 2 88 69 79 3 0 14 1.37 0.0 0 2.6 18 150 M M 8 1238 23 160 3 88 68 78 2 0 13 0.00 0.0 0 3.1 10 10 M M 5 18 15 360 4 89 68 79 3 0 14 0.31 0.0 0 4.6 26 320 M M 4 138 32 340 5 77 66 72 -4 0 7 T 0.0 0 7.9 16 10 M M 9 1 20 10 6 73 54 64 -12 1 0 0.04 0.0 0 9.6 20 330 M M 5 1 23 10 7 77 51 64 -12 1 0 0.00 0.0 0 6.1 15 320 M M 4 18 330 8 81 53 67 -8 0 2 0.00 0.0 0 3.5 12 290 M M 5 18 15 280 9 84 55 70 -5 0 5 0.00 0.0 0 3.5 10 250 M M 4 18 13 240 10 87 64 76 1 0 11 0.00 0.0 0 7.1 20 200 M M 5 18 25 190 11 86 69 78 3 0 13 0.23 0.0 0 6.8 22 280 484 M 5 138 31 280 12 80 68 74 -1 0 9 1.09 0.0 0 3.1 18 220 333 40 10 1238 24 200 13 79 65 72 -3 0 7 0.04 0.0 0 6.0 15 210 425 51 10 1 18 210 14 72 64 68 -7 0 3 0.16 0.0 0 5.0 12 10 M M 9 1 15 10 15 78 58 68 -7 0 3 T 0.0 0 2.7 8 10 M M 6 18 10 360 16 82 63 73 -2 0 8 T 0.0 0 3.2 12 320 M M 6 18 20 10 17 83 61 72 -2 0 7 0.00 0.0 0 3.6 16 200 M M 7 138 18 190 18 84 67 76 2 0 11 0.00 0.0 0 5.0 13 190 M M 6 128 18 150 19 88 71 80 6 0 15 0.02 0.0 0 8.1 14 190 M M 7 18 17 200 20 91 67 79 5 0 14 T 0.0 0 7.1 22 200 M M 7 18 26 200 21 78 61 70 -4 0 5 0.09 0.0 0 8.8 16 330 M M 9 18 20 330 22 78 55 67 -7 0 2 0.00 0.0 0 2.5 9 320 M M 3 1 14 100 23 84 58 71 -3 0 6 0.00 0.0 0 2.3 9 240 M M 2 18 12 240 24 87 58 73 0 0 8 0.00 0.0 0 3.5 8 180 M M 3 18 10 120 25 84 69 77 4 0 12 0.00 0.0 0 5.1 14 190 M M 5 18 15 190 26 84 65 75 2 0 10 0.00 0.0 0 5.4 15 190 M M 6 18 17 180 27 86 71 79 6 0 14 0.00 0.0 0 6.6 13 200 M M 7 18 16 210 28 91 69 80 7 0 15 0.00 0.0 0 5.8 13 160 M M 1 18 17 180 29 89 70 80 8 0 15 0.00 0.0 0 7.8 16 200 M M 4 1 21 190 30 89 66 78 6 0 13 T 0.0 0 6.3 17 60 M M 8 1 18 10 31 83 61 72 0 0 7 0.01 0.0 0 8.3 16 320 M M 6 18 22 320 ================================================================================ SM 2587 1976 2 278 3.79 0.0 164.1 1883 185 ================================================================================ AV 83.5 63.7 5.3 FASTST PSBL % 6 MAX(MPH) MISC ----> 26 320 32 340 ================================================================================ 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: 2004 LATITUDE: 38 57 N LONGITUDE: 77 27 W [TEMPERATURE DATA] [PRECIPITATION DATA] SYMBOLS USED IN COLUMN 16 AVERAGE MONTHLY: 73.6 TOTAL FOR MONTH: 3.79 1 = FOG DPTR FM NORMAL: -0.8 DPTR FM NORMAL: 0.01 2 = FOG REDUCING VISIBILITY HIGHEST: 91 ON 28,20 GRTST 24HR 1.37 ON 2- 2 TO 1/4 MILE OR LESS LOWEST: 51 ON 7 3 = THUNDER SNOW, ICE PELLETS, HAIL 4 = ICE PELLETS TOTAL MONTH: 0.0 INCH 5 = HAIL GRTST 24HR 0.0 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: 11 MAX 90 OR ABOVE: 2 0.10 INCH OR MORE: 6 MIN 32 OR BELOW: 0 0.50 INCH OR MORE: 2 MIN 0 OR BELOW: 0 1.00 INCH OR MORE: 2 [HDD (BASE 65) ] TOTAL THIS MO. 2 CLEAR (SCALE 0-3) 4 DPTR FM NORMAL -2 PTCLDY (SCALE 4-7) 19 SEASONAL TOTAL 2 CLOUDY (SCALE 8-10) 8 DPTR FM NORMAL -3 [CDD (BASE 65) ] TOTAL THIS MO. 278 DPTR FM NORMAL -24 [PRESSURE DATA] SEASONAL TOTAL 1059 HIGHEST SLP 30.28 ON 26 DPTR FM NORMAL 134 LOWEST SLP 29.83 ON 21 [REMARKS]