BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, NOVEMBER 11, 2016 ALL TIMES ARE IN EASTERN STANDARD TIME ARCTIC COLD FRONT BRINGS GUSTY NW WINDS, TEMPS EXPECTED TO PLUMMET WITH ITS PASSAGE Winds began to increase late this morning with the passage of a cold front and continued to gust above 25 knots through the early afternoon. The peak gust by 1:00PM EST was 32 kts (37 MPH) WNW at 12:53 PM. Temperatures rose to 59F by the last observation and had not yet begun to drop from the arrival of arctic air behind the front. Visibility had improved to 70 miles by late morning. Clear morning skies turned partly cloudy with scattered cumulus as the cold front passed. 7 A.M. Weather: Few altocumulus SW-NE Temperature: 47F; Dew Point: 31F; Wind: SW at 13G21 kts Sea-level pressure: 29.50 ins. Hg, falling then rising Visibility: 35 miles 6-hr Max temp: 47F 6-hr Min temp: 44F 24-hr precip: 0.00 in. BHO SA 1155 CLR 35 991/47/31/2313G21/950/ FEW AC SW-NE/ 8/030 55004 10047 20044 10 A.M. Weather: Few cumulus SE-NE Temperature: 56F; Dew Point: 34F; Wind: W at 15G24 kts Peak Wind: 26 kts (30 MPH) W at 9:24 AM EST Sea-level pressure: 29.53 ins. Hg, rising then steady Visibility: 70 miles BHO SA 1455 CLR 70 000/56/34/2815G24/953/ FEW CU SE-NE PK WND 2626/24/ 8/100 51009 1 P.M. Weather: Scattered cumulus Temperature: 56F; Dew Point: 32F; Wind: WNW at 21G32 kts Peak Wind: 32 kts (37 MPH) WNW at 12:53PM EST Sea-level pressure: 29.59 ins. Hg, rising, then more quickly Visibility: 70 miles 6-hr Max. temp: 59F 6-hr Min. temp: 47F BHO SA 1755 54 SCT 70 022/56/32/3021G32/959/ PK WND 3032/53/ 8/100 53022 10059 20047 SUMMARY FOR THURSDAY, NOVEMBER 10, 2016 TEMPERATURE (DEGREES F) MAX.....52 NORMAL.....52 MIN.....34 NORMAL.....35 MEAN....43 NORMAL.....44 DEPARTURE FROM 30-YEAR NORMAL........................-1 TOTAL DEPARTURE FOR THE MONTH.......................+25 [+2.3 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...........0 TOTAL COOLING UNITS FOR THE SEASON............901 DEPARTURE........+299 TOTAL COOLING UNITS LAST SEASON TO DATE.......811 DIFFERENCE........+90 HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............22 DEPARTURE..........+1 TOTAL HEATING UNITS FOR THE MONTH.............175 DEPARTURE.........-25 TOTAL HEATING UNITS FOR THE SEASON............596 DEPARTURE........-167 TOTAL HEATING UNITS LAST SEASON TO DATE.......538 DIFFERENCE........+42 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................28 SSW AT 7:40 P.M. ASOS........................31 SSW AT 7:41 P.M. DAVIS.......................30 SSW AT 7:40 P.M. RMY 31 FASTEST MILE FOR YESTERDAY.....................22 SSW AT 9:33 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................22 SSW AT 9:52 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................22 SSW AT 9:52 P.M. AVERAGE WIND SPEED AND DIRECTION.............11.3 SSW ASOS......................11.4 DAVIS.....................10.3 WSW [250 Deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE......-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.05 DEPARTURE......-1.51 ASOS..............0.07 TOTAL PRECIPITATION FOR THE YEAR..........34.41 DEPARTURE.....-10.92 ASOS.............34.77 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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 11/1 55/29/42/-4/0.00/.../.. 22 SSE AERO 22 S RMY N/A 11/2 69/45/57/+11/0.00/.../.. 24 SSW AERO 24 S RMY 26 11/3 65/49/57/+11/0.01/.../.. 38 W AERO 41 W RMY 38 11/4 56/35/46/+1/0.00/.../.. 26 NW AERO 26 NW RMY 30 11/5 55/32/44/-1/0.00/.../.. 24 W AERO 23 W RMY 24 11/6 49/39/44/-1/0.04/.../.. 23 N AERO 23 N RMY 23 11/7 46/33/40/-5/0.00/.../.. 21 N AERO 21 N RMY 20 11/8 64/36/50/+6/0.00/.../.. 17 W AERO 15 SSW RMY N/A 11/9 60/43/52/+8/T/.../.. 22 NNW AERO 22 NW RMY N/A 11/10 52/34/43/-1/0.00/.../.. 28 SSW AERO 30 SSW RMY 31 11/11 Low temp since midnight is 44F; normal low is now 35F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 11 HIGH 68 IN 1984 LOW 17 IN 1956 PRECIP 1.14 INCHES IN 1991 SNOWFALL 2.5 IN 1986 PEAK GUST 64 NW IN 1962 RECORDS FOR NOVEMBER 12 HIGH 74 IN 1909 LOW 18 IN 1926 PRECIP 3.25 INCHES IN 1947 SNOWFALL 8.1 INCHES IN 1987 PEAK GUST 79e MPH NW IN 1947 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle