BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, OCTOBER 10, 2016 ALL TIMES ARE IN EASTERN STANDARD TIME RAIN MOVES OFFSHORE, HIGH PRESSURE MOVES IN The cold front that passed yesterday left us with a total of 1.89 in. of rain bringing our monthly departure to +1.97 in. and our yearly departure down to -9.79. Winds were gusty out of the north with a peak gust of 32 mph, and strong gusts continued through today. Today's peak gust so far is out of the northwest at 31 mph at 9:13AM EST. The cold front has also left us with cooler temperatures. Yesterday's max temperature of 63F occurred at midnight, and it continued to drop throughout the day until this morning's low of 40F. Temperatures have warmed to 56F at the 1:00PM observation. High pressure returned to the area bringing clear skies and dew points in the low 30s. The clear and dry conditions increased visibility from Great Blue Hill to 80 miles. 7 A.M. Weather: Few cumulus in all directions Temperature: 43F; Dew Point: 35F; Wind: NW at 14G25 kts Peak Wind: 26 kts (30 mph) NW at 6:21AM EST Sea-level pressure: 30.08 ins. Hg, rising, then more quickly Visibility: 70 miles 6-hr Max temp: 43F 6-hr Min temp: 40F 24-hr precip: 1.67 in. BHO SA 1155 CLR 70 187/43/35/3214G25/008/ FEW CU ALQDS PK WND 3226/21/ 8/100 53023 MANUAL 70167 ASOS 70170 10043 20040 10 A.M. Weather: Few cumulus NE-SSE and WNW-NW Temperature: 49F; Dew Point: 35F; Wind: NW at 14G24 kts Peak Wind: 27 kts (31 mph) NW at 9:13AM EST Sea-level pressure: 30.13 ins. Hg, rising, then less quickly Visibility: 80 miles BHO SA 1455 CLR 80 203/49/35/3214G24/013/ FEW CU NE-SSE AND WNW-NW PK WND 3227/13/ 8/100 51016 1 P.M. Weather: Few cumulus NE-SE Temperature: 56F; Dew Point: 33F; Wind: NW at 13G21 kts Peak Wind: 26 kts (30 mph) NW at 12:13PM EST Sea-level pressure: 30.13 ins. Hg, rising, then falling Visibility: 80 miles 6-hr Max. temp: 56F 6-hr Min. temp: 43F BHO SA 1755 CLR 80 204/56/33/3213G21/013/ FEW CU NE-SE PK WND 3226/13/ 8/100 51001 10056 20043 SUMMARY FOR SUNDAY, OCTOBER 9, 2016 TEMPERATURE (DEGREES F) MAX.....63 NORMAL.....63 MIN.....44 NORMAL.....45 MEAN....54 NORMAL.....54 DEPARTURE FROM 30-YEAR NORMAL........................+0 TOTAL DEPARTURE FOR THE MONTH.......................+20 [+2.0 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0 DEPARTURE...........0 TOTAL COOLING UNITS FOR THE MONTH...............0 DEPARTURE..........-3 TOTAL COOLING UNITS FOR THE SEASON............894 DEPARTURE........+294 TOTAL COOLING UNITS LAST SEASON TO DATE.......810 DIFFERENCE........+84 HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............11 DEPARTURE...........0 TOTAL HEATING UNITS FOR THE MONTH..............69 DEPARTURE.........-20 TOTAL HEATING UNITS FOR THE SEASON............144 DEPARTURE.........-87 TOTAL HEATING UNITS LAST SEASON TO DATE.......144 DIFFERENCE..........0 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................32 N AT 7:58 P.M. ASOS........................34 NNE AT 8:00 P.M. DAVIS.......................32 NNE AT 7:59 P.M. RMY 34 FASTEST MILE FOR YESTERDAY.....................21 N AT 7:51 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................22 NNE AT 2:00 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................21 N AT 2:00 P.M. AVERAGE WIND SPEED AND DIRECTION.............12.8 N ASOS......................12.4 DAVIS.....................11.1 N [350 Deg.] * Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....1.67 DEPARTURE......+1.53 ASOS..............1.70 TOTAL PRECIPITATION FOR THE MONTH..........3.30 DEPARTURE......+1.97 ASOS..............3.31 TOTAL PRECIPITATION FOR THE YEAR..........30.62 DEPARTURE......-9.79 ASOS.............30.95 PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system gust RMY: R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized M: Missing data 10/1 57/52/55/-2/1.22/000/00 33 NNE AERO M RMY 34 10/2 55/52/54/-3/0.19/.../.. 23 N AERO M RMY N/A 10/3 69/53/61/+5/0.00/.../.. 21 ENE AERO M RMY 20 10/4 61/47/54/-2/T/.../.. 26 NE AERO M RMY 27 10/5 61/44/53/-3/0.00/.../.. 22 NE AERO M RMY 21 10/6 71/46/59/+4/0.00/.../.. 16 SW* AERO M RMY 15 10/7 75/54/65/+10/0.00/.../.. 16 S AERO M RMY 16 10/8 69/53/61/+7/0.00/.../.. 23 SSW AERO M RMY 23 10/9 63/44/54/0/1.89/.../.. 28 N AERO M RMY 34 10/10 Low temp since midnight is 40F; normal low is now 45F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 10 HIGH 85F IN 1949 LOW 27F IN 1929 PRECIP 2.02 INCHES IN 1998 SNOWFALL 6.8 INCHES IN 1979 (RECORD FOR MONTH) PEAK GUST 59 MPH WNW IN 1958 RECORDS FOR OCTOBER 11 HIGH 80F IN 1919,1949 LOW 28F IN 1993 PRECIP 0.96 INCHES IN 1903 SNOWFALL (NONE) PEAK GUST 66e MPH WNW IN 1941 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle and Lizzy Suzedell