BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, OCTOBER 19, 2016 ALL TIMES ARE IN EASTERN STANDARD TIME ABOVE AVERAGE TEMPERATURES CONTINUE, POSSIBLE RECORD HIGH MINIMUM Even with the lingering fog, yesterday's afternoon temperatures rebounded quickly to a daily max of 74F, 14F above normal. Today has been warmer with the max. rising to 79F by 1:00PM EST. This morning's overnight low of 64F will break the previous record of 63F for high minimum if temps do not cool too quickly tonight. Southwest winds have brought more humid air into the area. Dew points rose into the low 60s but had begun to decrease slightly by early afternoon. Winds have been moderate, averaging about 10 kts (12 MPH) for the day so far. 7 A.M. Weather: Two layers of broken altocumulus Temperature: 65F; Dew Point: 63F; Wind: SSW at 10 kts Sea-level pressure: 29.89 ins. Hg, rising, then more quickly Visibility: 15 miles, distant fog 6-hr Max temp: 66F 6-hr Min temp: 64F 24-hr precip: 0.00 in. BHO SA 1155 E84 BKN 120 BKN 15 123/65/63/2210/989/ DSNT FG/ 8/090 53020 10066 20064 10 A.M. Weather: Few cumulus in all directions, scattered altocumulus, broken altocumulus Temperature: 73F; Dew Point: 63F; Wind: WSW at 8 kts Sea-level pressure: 29.93 ins. Hg, rising, then less quickly Visibility: 30 miles, except 40 miles SW-N, distant haze BHO SA 1455 84 SCT E120 BKN 30 137/73/63/2508/993/ FEW CU ALQDS VSBY 40 SW-N DSNT HZ/ 8/190 51014 1 P.M. Weather: Scattered cumulus, few altocumulus E-SSW Temperature: 78F; Dew Point: 58F; Wind: WNW at 10 kts Sea-level pressure: 29.94 ins. Hg, rising then falling Visibility: 70 miles, except 40 miles ENE-S 6-hr Max. temp: 79F 6-hr Min. temp: 64F BHO SA 1755 39 SCT 70 138/78/58/3010/994/ FEW AC E-SSW VSBY 40 ENE-S/ 8/160 51001 10079 20064 SUMMARY FOR TUESDAY, OCTOBER 18, 2016 TEMPERATURE (DEGREES F) MAX.....74 NORMAL.....60 MIN.....56 NORMAL.....42 MEAN....65 NORMAL.....51 DEPARTURE FROM 30-YEAR NORMAL.......................+14 TOTAL DEPARTURE FOR THE MONTH.......................+54 [+2.8 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0 DEPARTURE...........0 TOTAL COOLING UNITS FOR THE MONTH...............2 DEPARTURE..........-3 TOTAL COOLING UNITS FOR THE SEASON............896 DEPARTURE........+294 TOTAL COOLING UNITS LAST SEASON TO DATE.......810 DIFFERENCE........+86 HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............0 DEPARTURE.........-14 TOTAL HEATING UNITS FOR THE MONTH.............148 DEPARTURE.........-58 TOTAL HEATING UNITS FOR THE SEASON............223 DEPARTURE........-125 TOTAL HEATING UNITS LAST SEASON TO DATE.......253 DIFFERENCE........-30 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................35 SSW AT 8:59 P.M. ASOS........................36 SSW AT 9:00 P.M. DAVIS.......................35 S AT 8:59 P.M. RMY 37 FASTEST MILE FOR YESTERDAY.....................26 SSW AT 9:15 P.M.* MAXIMUM 2-MINUTE ASOS AVERAGE..................26 SSW AT 9:08 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................27 SSW AT 9:00 P.M. AVERAGE WIND SPEED AND DIRECTION.............10.8 S ASOS......................11.3 DAVIS.....................10.2 S [190 Deg.] *last of several occurrences 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..........3.84 DEPARTURE......+1.16 ASOS..............3.86 TOTAL PRECIPITATION FOR THE YEAR..........31.16 DEPARTURE.....-10.60 ASOS.............31.50 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 57/40/49/-5/0.00/.../.. 32 NW AERO M RMY 32 10/11 62/39/51/-2/0.00/.../.. 17 N AERO M RMY N/A 10/12 68/49/59/+6/0.00/.../.. 17 S AERO M RMY 17 10/13 71/52/62/+9/T/.../.. 24 SSW AERO M RMY 28 10/14 58/41/50/-2/0.00/.../.. 26 NNW AERO M RMY 25 10/15 58/38/48/-4/0.00/.../.. 23 S AERO M RMY 26 10/16 68/46/57/+6/0.00/.../.. 28 SSW AERO M RMY 30 10/17 76/58/67/+16/0.00/.../.. 23 WSW AERO M RMY N/A 10/18 74/56/65/+14/0.54/.../.. 35 SSW AERO M RMY 37 10/19 Low temp since midnight is 64F; normal low is now 42F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 19 HIGH 81F IN 1945 LOW 21F IN 1922 PRECIP 3.64 INCHES IN 1932 SNOWFALL 1.0 INCHES IN 1972 PEAK GUST 66 MPH SSW IN 1967 RECORDS FOR OCTOBER 20 HIGH 78F IN 1965,1984 LOW 24F IN 1972 PRECIP 7.10 INCHES IN 1996 (RECORD FOR MONTH) SNOWFALL TRACE IN 1934,1943 PEAK GUST 63 MPH W IN 1966 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle