Preliminary Local Climatological Data (WS Form: F-6) Station: DAYTON OH Month: DEC Year: 1997 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 15 16 17 18 Dy Max Min Avg Dep HDD CDD Wtr Snw Dpth Avg Spd Dir Min Psbl S-S Wx Spd Dr =============================================================================== 1 39 31 35 -2 30 0 0.00 M M 10.7 24 10 M M M 29 10 2 42 28 35 -1 30 0 0.00 M M 7.4 14 110 M M M 16 140 3 52 35 44 8 21 0 0.32 M M 11.5 22 270 M M M 1,8 25 270 4 42 30 36 0 29 0 T M M 12.3 21 270 M M M 1 24 260 5 30 20 25 -10 40 0 0.01 M M 16.5 25 270 M M M 8,1 30 280 6 27 20 24 -11 41 0 T M M 17.8 25 260 M M M 1,8 29 260 7 32 26 29 -5 36 0 T M M 12.0 22 260 M M M 1,8 25 260 8 32 28 30 -4 35 0 T M 0 7.4 15 120 M M M 1,8 17 120 9 36 30 33 -1 32 0 0.07 M M 7.6 14 100 M M M 1,2 16 100 10 44 33 39 6 26 0 0.58 M 0 11.8 23 260 M M M 1 28 260 11 33 31 32 -1 33 0 T M 0 6.9 14 320 M M M 1 17 330 12 32 28 30 -3 35 0 T M 0 9.4 22 250 M M M 1,8 26 270 13 33 25 29 -3 36 0 0.00 M 0 14.2 26 250 M M M 8 30 260 14 31 23 27 -5 38 0 0.00 M 0 4.7 13 30 M M M 1,8 15 30 15 44 19 32 0 33 0 0.00 M 0 9.1 18 210 M M M 1,8 20 200 16 49 29 39 8 26 0 0.00 M 0 9.2 15 210 M M M 8 16 210 17 46 26 36 5 29 0 0.00 M 0 4.4 13 10 M M M 8,1 14 10 18 47 24 36 5 29 0 0.00 M 0 9.2 17 200 M M M 1,8 20 210 19 55 35 45 15 20 0 0.00 M 0 10.1 15 210 M M M 1,8 17 210 20 42 34 38 8 27 0 0.00 M 0 9.1 20 330 M M M 8,1 22 330 21 39 32 36 6 29 0 T M 0 11.2 17 90 M M M 21 90 22 49 32 41 11 24 0 0.30 M M 14.6 25 230 M M M 1 30 240 23 39 34 37 8 28 0 T M 0 8.7 21 270 M M M 1,8 24 270 24 48 34 41 12 24 0 0.81 0.0 0 13.8 29 240 M M M 1,3 37 260 25 45 34 40 11 25 0 0.01 T 0 15.0 23 250 M M M 1,8 28 260 26 34 30 32 3 33 0 0.00 0.0 0 13.7 23 250 M M M 1,8 28 250 27 34 27 31 3 34 0 T T 0 8.0 15 320 M M M 1,8 18 320 28 34 21 28 0 37 0 0.00 0.0 0 8.2 16 180 M M M 1,8 20 190 29 36 23 30 2 35 0 T 0.2 0 5.6 11 170 M M M 1,8 13 170 30 30 22 26 -2 39 0 0.05 2.0 2 13.5 24 270 M M M 1 8 28 270 31 22 9 16 -11 49 0 T T 1 8.1 14 330 M M M 1,8 18 10 =============================================================================== Sm 1198 853 983 0 2.15 2.2 321.7 M M =============================================================================== Av 38.6 27.5 10.4 Fastst Psbl % M Max(mph) Misc ----> 29 240 M M 37 260 =============================================================================== Notes: # Last of several occurrences Column 17 Peak Wind in M.P.H. Preliminary Local Climatological Data (WS Form: F-6) , Page 2 Station: DAYTON OH Month: DEC Year: 1997 ** Temperature Data ** ** Precipitation Data ** SYMBOLS USED IN COLUMN 16 Average Monthly: 33.0 Total for Month: 2.15 1 = FOG Dptr fm normal: 1.4 Dptr fm normal: -0.78 2 = FOG REDUCING VISIBILITY Highest: 55 on 19 Grtst 24hr .82 on 24-25 TO 1/4 MILE OR LESS Lowest: 9 on 31 3 = THUNDER SNOW, ICE PELLETS, HAIL 4 = ICE PELLETS Total month: 2.2 Inches 5 = HAIL Grtst 24hr 2.8 on 30 6 = GLAZE OR RIME Grtst depth: 2 on 30 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: 8 0.01 inch or more: 8 Max 90 or above: 0 0.10 inch or more: 4 Min 32 or below: 24 0.50 inch or more: 2 Min 0 or below: 0 1.00 inch or more: 0 ** HDD (Base 65) ** Total this Mo. 983 Dptr fm normal -52 Seasonal total 2229 Dptr fm normal 97 ** CDD (Base 65) ** Total this Mo. 0 Dptr fm normal 0 ** Pressure Data ** Seasonal total 708 Highest SLP 30.48 on 31 Dptr fm normal -178 Lowest SLP 29.48 on 30 =============================================================================== ------------------