BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, OCTOBER 16, 2016 ALL TIMES ARE IN EASTERN STANDARD TIME TEMPERATURES CLIMB TO SLIGHTLY ABOVE AVERAGE AS DRY CONDITIONS PREVAIL Above average temperatures took hold today, reaching a high of 67F by the 1:00PM observation. Despite thin, high cirrus and scattered altostratus, it was still a very sunny and pleasant day. A high pressure system continued to bring dry conditions with dewpoints in the upper 40s. Winds were gusting out of the South as high pressure moved away causing a large fall in the barometric pressure for the day. 7 A.M. Weather: Scattered cirrostratus, Few stratocumulus SE-SW, Temperature: 49F; Dew Point: 46F; Wind: SSW at 17 kts Sea-level pressure: 30.19 ins. Hg,falling unsteadily Visibility: 60 miles 6-hr Max temp: 49F 6-hr Min temp: 46F 24-hr precip: 0.00 in. BHO SA 1155 250 SCT 60 225/49/46/2117/019/ FEW CS SE-SW DSNT/ 8/508 57009 10049 20046 10 A.M. Weather: Scattered altocumulus, scattered cirrostratus Temperature: 60F; Dew Point: 48F; Wind: SSW at 16 kts gust 24 Sea-level pressure: 30.13 ins. Hg, falling then faster Visibility: 55 miles BHO SA 1455 60 SCT 250 SCT 205/60/48/2116G24/013/ 8/088 58020 1 P.M. Weather: Scattered Altostratus, Scattered Cirrostratus Temperature: 67F; Dew Point: 51F; Wind: SW at 17 kts Gust 24 Sea-level pressure: 30.04 ins. Hg, falling, then more quickly Visibility: 50 miles 6-hr Max. temp: 67F 6-hr Min. temp: 49F BHO SA 1755 120 SCT 250 SCT 50 176/67/51/2217G24/004/ LGT DSNT HZ/ 8/088 58029 10067 20049 SUMMARY FOR SATURDAY, OCTOBER 15, 2016 TEMPERATURE (DEGREES F) MAX.....58 NORMAL.....61 MIN.....38 NORMAL.....43 MEAN....48 NORMAL.....52 DEPARTURE FROM 30-YEAR NORMAL........................-4 TOTAL DEPARTURE FOR THE MONTH.......................+18 [+1.3 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..........-5 TOTAL COOLING UNITS FOR THE SEASON............894 DEPARTURE........+292 TOTAL COOLING UNITS LAST SEASON TO DATE.......810 DIFFERENCE........+84 HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............17 DEPARTURE..........+4 TOTAL HEATING UNITS FOR THE MONTH.............140 DEPARTURE.........-24 TOTAL HEATING UNITS FOR THE SEASON............215 DEPARTURE.........-91 TOTAL HEATING UNITS LAST SEASON TO DATE.......205 DIFFERENCE........+10 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................23 S AT 11:07 P.M. ASOS........................24 S AT 11:09 P.M. DAVIS.......................22 SSW AT 11:08 P.M. RMY 25 FASTEST MILE FOR YESTERDAY.....................16 S AT 11: P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................16 SSW AT 11:45 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................16 SSW AT 11:23 P.M. AVERAGE WIND SPEED AND DIRECTION..............9.3 NW ASOS.......................9.7 DAVIS......................8.4 NNW [330 Deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE......-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........3.30 DEPARTURE......+1.08 ASOS..............3.31 TOTAL PRECIPITATION FOR THE YEAR..........30.62 DEPARTURE.....-10.68 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 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 Low temp since midnight is 45F; normal low is now 43F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 16 HIGH 86F IN 1897 LOW 28F IN 1886 PRECIP 2.82 INCHES IN 1974 SNOWFALL TRACE IN 2009 PEAK GUST 68e MPH SSE IN 1954 (HURRICANE HAZEL) RECORDS FOR OCTOBER 17 HIGH 86F IN 1947 LOW 25F IN 1886 PRECIP 1.87 INCHES IN 1989 SNOWFALL TRACE IN 1970 PEAK GUST 55 MPH NE IN 1964 TODAY'S REPORT PREPARED BY: Robert Millette