BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, NOVEMBER 12, 2017 ALL TIMES ARE IN EASTERN STANDARD TIME TEMPERATURES INCREASE AFTER NEAR RECORD BREAKING COLD... Temperatures have been increasing since yesterday's low minimum temperatures of 18F just before 5:00 A.M. EST. The record low for November 11th is 17F. Winds from the northwest kept temperatures well below seasonable with a maximum high temperature of 36F, this is 16 degrees below the normal of 52F. Temperatures although on the rise continue to be below normal. Temperature dropped overnight down to 27F and we have had a high of 43F so far today. This is nine degrees below normal of 52F. As pressure drops skies have been a mixture of broken altocumulus and cirrostratus clouds all day. Visibility increased from 60 miles at the 7:00 A.M. EST to 70 miles at each other observation. A distant haze was visible at the 10:00 A.M. observation but it did not fully obscure visibility. Wind has been light and variable today. Today's Observations: 7 A.M. Weather: Scattered altocumulus, broken altocumulus broken cirrostratus, few cumulus distant ENE-E Temperature: 30F; Dew Point: 10F; Wind: ESE at 4 kts, Wind: Light Sea-level pressure: 30.53 ins. Hg, rising steadily Visibility: 60 miles 6-hr Max temp: 30F 6-hr Min temp: 27F 24-hr precip: 0.00 inches BHO SA 1155 200 SCT E230 BKN 300 BKN 60 339/30/10/1104/053/ FEW CU DSNT ENE-E WND LGT/ 8/196 58001 10030 20027 10 A.M. Weather: Broken altocumulus, broken cirrostratus, few distant cumulus ENE-SSW Temperature: 36F; Dew Point: 21F; Wind: NW at ESE 4 kts, Wind: Light Sea-level pressure: 30.52 ins. Hg, steady then falling Visibility: 70 miles, distant haze in all directions BHO SA 1455 E150 BKN 220 BKN 70 335/36/21/1104/052/ FEW CU DSNT ENE-SSW DSNT HZ ALQDS WND LGT/ 8/136 58004 1 P.M. Weather: Scattered stratocumulus, broken altocumulus, broken cirrostratus Temperature: 42F; Dew Point: 26F; Wind: SSW at 4 kts, Wind: Light Sea-level pressure: 30.46 ins. Hg, falling, then more quickly Visibility: 70 miles 6-hr Max temp: 43F 6-hr Min temp: 30F BHO SA 1755 40 SCT E150 BKN 230 BKN 70 316/42/26/E2104/046/ WND LGT/ 8/496 58019 10043 20030 SUMMARY FOR SATURDAY, NOVEMBER 11, 2017 TEMPERATURE (DEGREES F) MAX.....36 NORMAL.....52 MIN.....18 NORMAL.....35 MEAN....27 NORMAL.....43 DEPARTURE FROM 30-YEAR NORMAL........................-16 TOTAL DEPARTURE FOR THE MONTH........................+16 [+0.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............38 DEPARTURE..........16 TOTAL HEATING UNITS FOR THE MONTH.............210 DEPARTURE.........-12 TOTAL HEATING UNITS FOR THE SEASON............478 DEPARTURE........-307 TOTAL HEATING UNITS LAST SEASON TO DATE.......614 DIFFERENCE.......-136 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................28 WNW AT 6:32 A.M. AERO........................26 WNW AT 6:33 A.M. ASOS........................28 NW AT 6:33 A.M. DAVIS.......................27 NW AT 6:33 A.M. RMY 28 FASTEST MILE FOR YESTERDAY.....................19 WNW AT 6:33 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................20 NW AT 7:09 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................20 NW AT 6:33 A.M. AVERAGE WIND SPEED AND DIRECTION..............9.5 NW ASOS.......................9.2 DAVIS......................9.1 NNW [331 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..........0.26 DEPARTURE......-1.30 ASOS..............0.24 TOTAL PRECIPITATION FOR THE YEAR..........48.06 DEPARTURE......+2.73 ASOS...............N/A *** *** ASOS annual total not available due to erroneous readings 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 53/39/46/0/0.00/.../.. 25 SE AERO 24 SE RMY 25 11/2 71/49/60/+14/0.00/.../.. 28 SSE AERO 25 SSE RMY 27 11/3 74/47/61/+15/T/.../.. 35 WNW AERO 35 WNW RMY 38 11/4 54/39/47/+2/0.00/.../.. 31 NW AERO 31 NW RMY N/A 11/5 61/46/54/+9/0.01/.../.. 26 S AERO 24 S RMY N/A 11/6 64/47/56/+11/0.05/.../.. 32 S AERO 28 SSW RMY 35 11/7 46/35/41/-4/0.11/.../.. 26 NNW AERO 23 N RMY 26 11/8 43/34/39/-5/0.08/.../.. 26 N AERO 23 N RMY 27 11/9 50/31/41/-3/0.01/.../.. 25 S AERO 23 S RMY N/A 11/10 45/20/33/-11/0.00/.../.. 46 WNW AER0 44 WNW RMY 46 11/11 36/18/27/-16/0.00/.../.. 28 WNW AERO 26 WNW RMY 28 11/12 Low temp since midnight is 27F; normal low is now 35F DAILY RECORDS FOR NOVEMBER 2017 11/10/17: DAILY RECORD LOW MINIMUM TEMPERATURE OF 20F, TIES WITH PREVIOUS RECORD SET IN 2004 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): 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 RECORDS FOR NOVEMBER 13 HIGH 66 IN 1931, 1964 LOW 14 IN 1920 PRECIP 1.96 INCHES IN 1982 SNOWFALL 4.6 IN 2004 PEAK GUST 77 S IN 1982 TODAY'S REPORT PREPARED BY: Kaitlin Geagan