CXUS51 KLWX 180815 CF6IAD PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) STATION: WASHINGTON DULLES DC MONTH: MAY YEAR: 2026 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 12Z AVG MX 2MIN DY MAX MIN AVG DEP HDD CDD WTR SNW DPTH SPD SPD DIR MIN PSBL S-S WX SPD DR ================================================================================ 1 68 38 53 -7 12 0 0.01 0.0 0 5.3 18 200 M M 4 25 220 2 60 45 53 -7 12 0 0.00 0.0 0 11.3 18 330 M M 8 28 340 3 63 40 52 -9 13 0 0.00 0.0 0 7.8 20 300 M M 3 29 310 4 78 41 60 -1 5 0 0.00 0.0 0 8.8 21 200 M M 5 29 190 5 85 58 72 11 0 7 0.00 0.0 0 13.9 25 210 M M 3 37 200 6 72 58 65 4 0 0 0.27 0.0 0 13.3 22 200 M M 9 1 34 180 7 65 45 55 -7 10 0 0.01 0.0 0 7.3 17 350 M M 6 24 350 8 73 37 55 -7 10 0 0.00 0.0 0 7.6 18 280 M M 3 31 290 9 76 52 64 2 1 0 0.00 0.0 0 5.5 15 200 M M 7 20 210 10 82 47 65 3 0 0 0.09 0.0 0 4.6 26 300 M M 4 1 36 300 11 64 47 56 -7 9 0 0.03 0.0 0 6.0 20 20 M M 7 27 360 12 72 38 55 -8 10 0 0.00 0.0 0 5.0 16 180 M M 2 1 21 160 13 77 54 66 3 0 1 0.41 0.0 0 11.0 22 300 M M 6 13 32 310 14 63 51 57 -7 8 0 0.04 0.0 0 11.9 22 300 M M 8 1 32 290 15 73 51 62 -2 3 0 0.00 0.0 0 6.9 17 320 M M 7 26 290 16 85 45 65 1 0 0 T 0.0 0 5.0 20 280 M M 4 29 280 17 88 57 73 9 0 8 0.01 0.0 0 4.6 14 310 M M 5 20 290 ================================================================================ SM 1244 804 93 16 0.87 0.0 135.8 M 91 ================================================================================ AV 73.2 47.3 8.0 FASTST M M 5 MAX(MPH) MISC ----> 26 300 37 200 ================================================================================ 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 DC MONTH: MAY YEAR: 2026 LATITUDE: 38 57 N LONGITUDE: 77 27 W [TEMPERATURE DATA] [PRECIPITATION DATA] SYMBOLS USED IN COLUMN 16 AVERAGE MONTHLY: 60.2 TOTAL FOR MONTH: 0.87 1 = FOG OR MIST DPTR FM NORMAL: -1.9 DPTR FM NORMAL: -1.66 2 = FOG REDUCING VISIBILITY HIGHEST: 88 ON 17 GRTST 24HR 0.45 ON 13-14 TO 1/4 MILE OR LESS LOWEST: 37 ON 8 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: 8 MAX 90 OR ABOVE: 0 0.10 INCH OR MORE: 2 MIN 32 OR BELOW: 0 0.50 INCH OR MORE: 0 MIN 0 OR BELOW: 0 1.00 INCH OR MORE: 0 [HDD (BASE 65) ] TOTAL THIS MO. 93 CLEAR (SCALE 0-3) 3 DPTR FM NORMAL 12 PTCLDY (SCALE 4-7) 13 TOTAL FM JUL 1 4372 CLOUDY (SCALE 8-10) 1 DPTR FM NORMAL -186 [CDD (BASE 65) ] TOTAL THIS MO. 16 DPTR FM NORMAL -16 [PRESSURE DATA] TOTAL FM JAN 1 102 HIGHEST SLP M ON M DPTR FM NORMAL 48 LOWEST SLP 29.74 ON 6 [REMARKS]