Deg. Days Precip Ty Precip Wind Solar Hu- Adj. to Sea Level mid- ity Avg Res Res Peak Minute 1 fog 2 hvy fog 3 thunder 4 ice plt 5 hail 6 glaze 7 duststm 8 smk, hz 9 blw snw 1 2 3 4A 4B 5 6 7 8 9 12 14 15 17 18 20 21 23 Date Maximum Minimum Average Mean Mean LOCAL CLIMATOLOGICAL DATA Monthly Summary July 23 Station: Blue Hill Meteorological Observatory Latitude: 42 12' 44" N Longitude: 71 06' 53" W Elevation (Ground): 635 feet Time Zone: Eastern Heating Base 65 F Cooling Base 65 F Snow Cvr Water Equivalent 1 82.2 69.2 75.7 73.0 71 94 0... 0 0. 0.0 30.05 29.91 29.971.5.3 7 30 S 24 6 151 2 82.3 61.2 71.8 71.5 69 93 0 7... 0 0.00 0.0 30.17 30.05 30.4.1 7.5 187 24 SSW 212 129 3 86.4 61.5 74.0 74.9 70 86 0 9... 0 0.00 0.0 30.18 30. 30.146.6.1 2 29 SW 3 234 4 89.5 70.9 80.2 79.9 73 82 0... 0 0.00 0.0 30.17 30.06 30.9.4.2 234 27 WSW 20 1 3 5 90.8 73.0 81.9 81.6 73 77 0 17... 0 0.00 0.0 30. 30.00 30.065.9.6 236 25 WSW 18 2 290 6 89.7 73.1 81.4 80.6 72 77 0 17... 0 0.00 0.0 30.03 29.93 29.987.4 9.8 269 26 W 274 280 7 91.1 70.9 81.0 78.5 71 80 0... 0 0. 0.0 29.97 29.86 29.929 7.7 6.5 257 41 S 30 203 214 8 81.7 64.3 73.0 73.6 70 90 0 8... 0 0.03 0.0 30. 29.86 29.9 8.5 0.6 1 NNE 14 54 256 9 71.2 63.3 67.2 66.4 65 95 0 2... 0 0.00 0.0 30.06 30.00 30.035 5.1 4.7 58 NE 39 123 84.4 64.9 74.7 72.7 70 92 0... 0 0. 0.0 30. 29.76 29.892.4 7.8 9 33 S 26 189 180 78.5 68.6 73.5 73.2 71 94 0 9... 0 0.47 0.0 29.88 29.75 29.796 8.1 6.3 0 24 WSW 17 259 120 12 69.4 62.9 66.2 66.3 62 87 0 1... 0 0.00 0.0 30.15 29.88 30.0.3.8 46 29 NNE 40 8 74.3 62.6 68.5 67.5 66 95 0 4... 0 0.06 0.0 3 30.15 30.240 5.9 5.0 70 21 ENE 14 59 2 14 89.0 70.3 79.7 77.7 73 86 0 15... 0 0.00 0.0 3 30.17 30.1 4.9 2.7 261 15 W 272 245 15 90.0 72.2 81.1 80.4 72 77 0... 0 0.00 0.0 30.17 30.06 30.4 6.0 3.6 290 NNW 12 315 252 90.6 70.4 80.5 80.2 70 72 0... 0 0.00 0.0 30.12 30.06 30.084 7.0 3.3 343 15 WNW 12 3 294 17 93.0 73.5 83.3 81.8 71 71 0... 0 0.00 0.0 30. 29.96 30.064 7.7 7.1 2 23 S 17 2 286 18 90.8 74.1 82.5 81.1 73 77 0 18... 0 0.00 0.0 29.96 29.89 29.931 8.9 3.3 9 23 SW 5 293 94.5* 75.5 85.0* 84.3 74 74 0 21... 0 0.00 0.0 29.90 29.68 29.788.7.4 8 36 WSW 27 2 286 20 92.5 73.4 83.0 81.8 74 79 0 18... 0 0.00 0.0 29.75 29.60 29.666.6.1 232 29 SW 21 0 5 21 82.2 68.4 75.3 74.3 66 75 0... 0 0.00 0.0 29.94 29.75 29.864 7.0 1.9 31 18 WNW 12 291 245 79.6 66.4 73.0 71.4 67 88 0 8... 0 0.00 0.0 29.97 29.84 29.9 7.0 4.6 92 18 NE 48 244 23 81.2 68.1 74.6 71.4 70 97 0... 0 0.71 0.0 29.84 29.50 29.618 7.4 3.8 186 35 WSW 250 1 24 83.2 66.0 74.6 75.1 69 82 0... 0 0.00 0.0 29.89 29.54 29.657 7.0 5.8 294 21 N 15 350 249 25 66.0 56.6* 61.3* 58.8 55 88 3 0... 0 0.33 0.0 30.05 29.89 29.998 9.5 9.0 18 24 NNE 34 50 26 66.9 58.4 62.7 62.2 62 98 2 0... 0 0.59 0.0 30. 29.90 29.944 9.8 7.7 328 24 N 17 3 47 27 82.3 60.2 71.3 69.3 64 84 0 6... 0 0.00 0.0 30. 29.98 30.0 9.3 8.3 2 23 S 208 250 28 78.3 65.1 71.7 68.8 67 94 0 7... 0 0.02 0.0 29.99 29.94 29.957 6.6 5.1 63 14 N 67 147 29 80.4 65.7 73.0 71.7 69 92 0 8... 0 0.08 0.0 30.00 29.94 29.978 6.9 6.4 188 20 S 15 0 3 30 81.2 60.4 70.8 70.4 61 74 0 6... 0 0.00 0.0 30.06 30.00 30.028 8.5 8.3 296 18 WNW 14 297 293 31 80.1 60.6 70.3 70.3 61 73 0 6... 0 0.00 0.0 30. 30. 30.050 6.2 2.7 279 15 S 2 238 Ice Pellets Snow Maximum Minimum Mean Dir Dir Dir Radiation Sum Sum ------ ------ --- ---- Ttl Ttl For the month: 2573 5 321 Number of Days 2.56 0.0 3 29.50 29.972 8.6 2.9 231 41 S 30 203 --- Avg Avg Avg Mean Avg Avg ---- ---- Precip Season Ttl Date Date ------ ---- ---- --- Date Date Avg 83.0 66.8 74.9 73.9 68 84.5 ---- ---- >. inch 24. 0.0 23 ------ ---- ---- --- 7 7 2 Season Snow, Ice Number of Days to Date > 1.0 inch 0 Greatest in 24 Hours and Dates Greatest Depth on Ground of Snow, Ice Pellets or Ice Max Min 5 473 Thunder 0 Precipitation Snow, Ice Plts and Date > 90 F < 32 F < 32 F < 0 F ---- ---- Heavy Fog 0 0.84 25-26 0.0-0 - 0 0 0 ---- ---- Clear 0 Partly Cloudy 0 Cloudy 0 NOTES: Units are: = F, Wind=mph, =Inches Hg, Precipitation=inches. Data in column 4A are (MAX+MIN) 2, whereas columns 4B, 5, 6, 15,, 23 are means via continuous observations for 24 hours. Column 5: Dew point is calculated from temperature and humidity and is continuously averaged for 24 hours. Data in columns 9,, 12 are entered manually by the station observer. Columns 17-18: Resultant wind is calculated by the vector sum of continuous wind observations. Column 23: Solar Radiation is measured in Watts/m^2 and is continuously averaged for 24 hours. Data in columns 4B, 5, 6, 15,, 23 are updated continuously, there by achieving a "true" mean.
OBSERVATIONS AT 3-HOUR INTERVALS July 23: Blue Hill Meteorological Observatory Wind Wind Wind Hour JUL JUL 02 JUL 03 0 29.91 0.03 69 68 97 20 18 0 29.92 0.00 70 69 98 8 48 29.96 0. 70 70 98 18 8 14 9 29.98 0.00 71 71 98 20 7 15 620 29.97 0.00 81 76 85 20 9 20 366 29.95 0.00 80 73 79 20 15 30 63 29.99 0.00 74 72 95 18 9 17 0 30.05 0.00 71 70 97 20 23 0 30.05 0.00 71 70 98 20 20 0 30. 0.00 70 70 98 20 20 30. 0.00 71 70 98 20 12 21 241 30. 0.00 74 72 94 15 318 30.12 0.00 80 74 84 15 146 30. 0.00 80 74 81 20 4 9 51 30.12 0.00 66 63 90 06 12 14 0 30.15 0.00 63 62 97 14 7 9 0 30.15 0.00 64 63 96 06 4 5 0 30.14 0.00 65 64 98 14 2 30. 0.00 69 69 98 21 12 21 4 30.17 0.00 78 72 84 23 12 357 30. 0.00 83 74 73 626 30. 0.00 86 75 71 21 148 30. 0.00 82 73 73 20 0 30.15 0.00 75 72 89 21 JUL JUL 05 JUL 06 0 30.15 0.00 72 70 94 0 30. 0.00 71 70 97 24 18 121 30. 0.00 72 72 98 24 682 30. 0.00 83 76 81 26 7 905 30.12 0.00 88 76 67 25 17 7 30.08 0.00 89 75 64 12 21 146 30. 0.00 86 75 71 18 0 30.09 0.00 78 74 86 18 0 30.09 0.00 75 71 89 23 17 0 30.09 0.00 74 71 91 25 202 30. 0.00 75 72 90 24 9 14 686 30. 0.00 84 75 75 26 962 30.08 0.00 90 75 61 21 14 20 643 30.03 0.00 90 73 58 17 141 30.00 0.00 87 75 68 21 23 0 30.03 0.00 79 73 83 12 18 0 30.03 0.00 76 72 87 23 9 0 30.02 0.00 74 71 91 25 12 18 2 30.03 0.00 75 72 91 25 645 30. 0.00 84 75 75 26 15 933 29.98 0.00 88 74 63 27 15 7 29.95 0.00 88 74 63 29 12 18 5 29.93 0.00 85 72 65 27 17 0 29.96 0.00 77 69 76 29 JUL JUL 08 JUL 09 0 29.97 0.00 74 67 80 29 0 29.95 0.00 72 67 84 27 9 178 29.97 0.00 73 68 83 26 633 29.96 0.00 84 71 65 28 6 12 329 29.94 0.00 87 75 67 29 4 9 2 29.88 0.00 88 75 65 23 2 9 12 29.86 0.00 76 74 94 7 0 29.89 0.00 75 73 94 8 0 29.86 0.00 74 72 93 8 0 29.87 0.00 73 72 95 21 9 209 29.88 0.00 74 72 94 25 15 466 29.90 0.00 78 74 88 27 8 315 29.91 0.00 78 72 83 05 15 649 29.92 0.00 78 71 80 06 12 15 76 29.93 0.00 68 65 92 7 15 0 29.99 0.00 64 64 97 5 14 0 30.00 0.00 64 63 97 7 0 30.00 0.00 64 63 98 02 5 8 51 30.05 0.00 64 64 98 00 2 5 5 30.05 0.00 66 65 98 00 3 6 7 30.06 0.00 69 67 94 05 4 7 155 30.05 0.00 70 67 89 3 6 42 30.02 0.00 67 65 92 05 8 12 0 30. 0.00 65 64 95 09 8 JUL JUL JUL 12 0 30.03 0.00 65 64 96 08 7 0 29.98 0.00 65 64 97 08 8 33 29.97 0.00 67 66 98 09 8 95 29.94 0.00 71 71 98 17 5 9 09 29.89 0.00 82 75 79 17 6 29.82 0.00 82 74 76 17 21 31 29.76 0.00 75 73 92 21 0 29.79 0.00 73 72 96 18 0 29.76 0.00 72 71 96 20 12 0 29.75 0.00 72 71 97 20 12 97 29.77 0.00 72 71 98 8 30 29.79 0. 73 72 96 26 24 378 29.80 0.00 74 71 91 4 8 299 29.79 0.00 78 73 84 20 5 9 79 29.82 0.00 76 73 90 5 7 0 29.86 0.00 69 68 96 32 6 8 0 29.88 0.00 69 68 97 35 0 29.93 0.00 66 65 96 03 93 29.98 0.00 64 61 90 03 15 396 30. 0.00 68 62 81 25 439 30.09 0.00 66 60 81 9 20 457 30.09 0.00 68 62 81 05 7 17 74 30. 0.00 65 61 86 05 7 14 0 30.14 0.00 63 61 92 06 JUL JUL 14 JUL 15 0 30. 0.00 63 62 96 08 6 9 0 30. 0.00 63 62 97 14 39 30. 0.08 63 62 98 05 18 174 30.26 0.00 66 65 98 5 8 397 30.27 0.00 69 68 98 03 4 9 323 30.27 0.00 73 69 87 06 6 9 35 30.26 0.00 71 69 91 05 4 7 0 30.27 0.00 69 68 96 12 5 7 0 30.26 0.00 71 70 98 7 0 30.25 0.00 71 70 98 25 4 6 83 30.26 0.00 72 72 99 27 0 0 673 30.25 0.00 80 75 85 27 6 9 0 30. 0.00 76 71 87 24 6 9 0 30.15 0.00 73 70 91 29 7 9 179 30.15 0.00 73 71 93 31 12 684 30.14 0.00 84 74 72 34 4 7 984 30.23 0.00 86 74 68 26 7 30. 0.00 88 74 64 34 8 12 664 30.18 0.00 87 74 66 26 8 12 186 30.08 0.00 87 74 67 32 6 12 39 30.18 0.00 79 74 85 33 3 4 58 30.06 0.00 84 71 66 15 4 5 0 30.18 0.00 77 75 91 5 6 0 30.08 0.00 78 72 82 21 8 JUL JUL 17 JUL 18 0 30. 0.00 75 71 87 31 9 0 30.06 0.00 72 66 84 32 9 12 176 30.09 0.00 72 67 85 32 664 30. 0.00 83 73 71 33 4 8 244 30.08 0.00 89 70 53 31 14 626 30. 0.00 89 72 58 5 9 148 30.08 0.00 83 72 69 09 7 0 30. 0.00 77 68 74 15 6 7 0 30. 0.00 76 65 69 21 7 8 0 30. 0.00 76 70 83 24 6 7 2 30.12 0.00 77 70 80 25 5 6 657 30.12 0.00 87 73 64 18 7 886 30.08 0.00 90 70 52 25 6 15 647 30.02 0.00 93 70 47 23 9 15 121 29.97 0.00 83 73 70 18 12 20 0 29.99 0.00 76 70 81 20 12 MAXIMUM SHORT DURATION PRECIPITATION 0 29.95 0.00 75 70 83 23 23 0 29.91 0.00 75 70 86 24 17 149 29.94 0.00 76 72 88 28 9 12 656 29.96 0.00 87 74 66 35 6 12 837 29.95 0.00 88 74 63 03 7 599 29.92 0.00 86 74 67 9 14 98 29.91 0.00 82 75 78 15 0 29.92 0.00 79 73 84 15 Time Period (minutes) 5 15 20 30 45 60 80 0 120 150 180 Precipitation 0. 0.20 0.25 0.27 Ended: Date 23 23 Ended: Time 33 34 27 28 The precipitation amounts may occur at any time during the month. The time indicated is the ending time of the interval. Date and time are not entered for trace amounts.
OBSERVATIONS AT 3-HOUR INTERVALS July 23: Blue Hill Meteorological Observatory Wind Wind Wind Hour JUL JUL 20 JUL 21 0 29.89 0.00 76 73 90 20 9 0 29.86 0.00 76 73 90 12 5 29.84 0.00 77 74 88 15 647 29.83 0.00 87 76 69 23 9 18 849 29.78 0.00 93 74 54 23 28 645 29.70 0.00 94 74 53 23 17 31 9 29.69 0.00 88 77 69 21 18 24 0 29.72 0.00 82 76 80 21 18 27 0 29.70 0.00 80 74 83 21 14 0 29.67 0.00 78 74 89 12 15 83 29.68 0.00 78 75 90 17 336 29.66 0.00 88 77 72 21 12 18 889 29.62 0.00 91 74 58 25 15 26 46 29.62 0.00 85 73 67 20 46 29.65 0.00 82 74 76 24 5 0 29.72 0.00 77 74 88 23 5 6 0 29.76 0.00 72 62 72 29 17 0 29.78 0.00 70 62 76 30 9 12 74 29.84 0.00 70 64 81 00 8 5 29.88 0.00 76 66 73 06 6 471 29.90 0.00 80 68 68 6 635 29.89 0.00 81 67 61 14 6 58 29.89 0.00 76 65 70 6 12 0 29.93 0.00 70 67 89 14 8 JUL JUL 23 JUL 24 0 29.93 0.00 68 66 94 7 9 0 29.92 0.00 67 66 96 9 174 29.93 0.00 69 67 94 18 2 4 494 29.96 0.00 76 69 78 3 7 898 29.93 0.00 77 70 77 03 9 15 294 29.89 0.00 74 68 80 05 4 29.87 0.00 71 68 89 09 12 0 29.86 0.00 68 66 95 7 0 29.81 0.00 68 67 96 6 7 0 29.73 0.00 68 68 98 6 8 23 29.67 0.00 69 69 98 8 9 29.60 0.00 72 72 98 15 9 14 60 29.54 0.00 76 75 98 17 155 29.51 0.00 81 76 84 20 15 14 29.53 0.00 71 70 97 18 7 0 29.56 0.00 70 69 98 26 7 9 0 29.56 0.00 70 70 98 25 4 6 0 29.55 0.00 70 69 98 27 6 7 185 29.57 0.00 71 70 98 28 6 7 656 29.62 0.00 79 74 86 27 4 9 821 29.65 0.00 83 73 73 28 15 564 29.69 0.00 82 69 65 26 17 1 29.74 0.00 78 65 65 30 17 0 29.84 0.00 72 63 72 18 JUL 25 JUL 26 JUL 27 0 29.90 0.00 63 55 74 34 18 0 29.93 0.00 59 51 75 35 7 12 29.97 0.00 59 53 81 03 9 0 30.03 0.00 58 55 90 03 17 148 30.03 0.00 60 56 87 03 21 26 30.03 0.40 58 57 96 02 15 30. 0.05 58 57 97 02 18 0 30.03 0.00 58 58 98 0 30.00 0.00 59 58 98 00 9 15 0 29.96 0.06 59 59 98 35 12 9 29.95 0. 60 59 98 00 17 90 29.92 0.00 61 60 98 34 21 0 29.90 0.00 63 63 99 32 9 3 29.91 0.00 66 65 99 30 12 21 0 29.94 0.00 66 66 97 28 5 8 0 29.97 0.00 64 63 97 24 6 0 29.99 0.00 61 60 96 24 17 0 29.99 0.00 60 60 97 25 15 4 30.02 0.00 62 62 98 23 9 12 668 30. 0.00 69 68 97 7 9 990 30.02 0.00 78 66 67 23 4 12 257 29.99 0.00 80 64 59 20 8 14 5 29.98 0.00 75 65 72 18 12 0 30.00 0.00 67 65 92 17 14 JUL 28 JUL 29 JUL 30 0 29.97 0.00 66 65 97 15 8 0 29.94 0.00 66 65 97 03 7 9 28 29.95 0.05 66 66 98 8 12 176 29.97 0.00 69 68 98 35 5 7 352 29.95 0.00 75 71 86 05 2 7 248 29.94 0.00 73 69 86 9 14 39 29.95 0.00 68 66 94 05 9 12 0 29.98 0.00 66 65 97 9 JUL 31 0 30. 0.00 65 59 81 29 8 0 30.05 0.00 63 58 85 29 9 158 30.08 0.00 62 59 89 32 8 12 628 30.09 0.00 75 62 63 35 4 9 272 30.06 0.00 78 61 57 21 3 7 772 30. 0.00 78 60 55 18 3 6 84 30.02 0.00 72 64 75 6 8 0 30.02 0.00 68 63 83 8 12 0 29.98 0.00 67 66 98 21 3 7 0 29.97 0.00 66 65 98 20 9 40 29.99 0.00 67 67 99 20 5 7 272 30.00 0.00 71 70 99 18 6 156 29.99 0.00 75 70 83 15 17 721 29.95 0.00 80 73 81 17 6 12 29.94 0.00 76 71 86 17 17 0 30.00 0.00 72 70 95 8 0 30.00 0.00 67 65 94 31 9 0 30. 0.00 63 62 97 30 8 12 5 30.03 0.00 62 58 88 29 15 673 30.05 0.00 72 63 74 28 8 886 30. 0.00 78 60 55 29 14 7 30. 0.00 81 62 53 27 6 12 51 30.02 0.00 75 59 59 29 7 0 30.06 0.00 69 59 71 27 9 14 WEATHER NOTES SUMMARY BY HOUR NOTES: Units are: = F, Wind=mph, =Inches Hg, Precipitation=inches. Wind : s are those from which the wind is blowing, indicated in tens of degrees from true north: i.e., 09 for East, 18 for South, 27 for West, and 00 or 36 for North. Wind : The observed one-minute average speed in miles-per-hour. Wind : The maximum instantaneous wind speed for the -minute period preceding the observation. Rate: The instantaneous rainfall at the time of observation, calculated by timing consecutive 0." pulses from the electronic rain gauge and interpolating this for one hour. Hour Averages Wind Resultant Wind 0 29.973 70 67 91 8.9 24 4.0 0 29.963 69 66 93 9.1 25 3.9 9 29.983 69 67 93 8.6 27 3.1 434 29.990 76 70 83 7.5 26 2.6 582 29.977 80 70 74 9.0 26 3.0 437 29.952 81 70 72 9.5 21 3.5 75 29.950 76 69 81 8.9 18 3.0 0 29.979 71 68 89 8.9 20 4.0
HOURLY PRECIPITATION (Water Equivalent) July 23: Blue Hill Meteorological Observatory Date A.M. Hour Ending at P.M. Hour Ending at 02 03 05 06 08 09 12 02 03 05 06 08 09 12 Date 0.03 0. 0.03 02 02 03 03 05 05 06 06 0. 08 0.03 08 09 09 0. 0.03 0.15 0. 0.14 0.14 12 12 0. 0.02 14 14 15 15 17 17 18 18 20 20 21 21 23 0.02 0.03 0.03 0. 0. 0.06 0.21 0. 0.21 0.02 0. 23 24 24 25 0. 0.02 0. 0. 0. 0.03 0. 0. 25 26 0.02 0. 0. 0.06 0. 0.09 0. 0.03 0.03 0.03 0. 0. 0. 0. 0. 26 27 27 28 0.02 28 29 0.08 29 30 30 31 31 Sum 0.03 0.00 0.02 0. 0. 0.08 0.17 0.15 0. 0. 0.24 0. 0. 0.31 0.00 0. 0.12 0.45 0.06 0. 0.15 0.17 0. 0.00 Sum During a frozen precipitation event, hourly precipitation totals may not be recorded. In this case, daily amounts are typically entered in the last column (hour ending at 12 A.M.)
HOUR-BY-HOUR DATA July 23: Blue Hill Meteorological Observatory PRESSURE (in) TEMPERATURE ( F) DEW POINT ( F) HUMIDITY (%) 0 95 90 85 80 75 70 65 60 55 50 80 76 72 68 64 60 56 52 48 44 40 0 88 76 64 52 40 30.40 30.30 30.20 30. 30.00 29.90 29.80 29.70 29.60 29.50 29.40 WIND SPEED (mph) WIND DIRECTION SUN 50 45 40 35 30 25 20 15 5 0 360 315 270 5 180 5 90 45 0 00 1280 960 640 320 0 2.50 PRECIPITATION (in) 2.00 1.50 1.00 0.50 0.00 1 2 3 4 5 6 7 8 9 12 14 15 17 18 20 21 23 24 25 26 27 28 29 30 31
Wind Rose: July 23 Blue Hill Meteorological Observatory NNW N NNE NW NE WNW ENE W E WSW ESE SW SE SSW S SSE Maximum direction of wind: 93.5 miles from 2 Maximum sector of wind: 26.9 miles from SW 6382.1 total miles of wind