BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, DECEMBER 8, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME CLOUDY AND COLD FOLLOWING EARLY MORNING FLURRIES... Several hours of very light snow flurries occurred overnight into early this morning thanks to some ocean effect, however no accumulation resulted. Otherwise it's been a cloudy and cold day here on the summit as the temperature has failed to make it to 30 degrees today. Today is the first sub 30 degree day since way back on February 15th, when the high was 27 degrees! It has been a bit breezy at times, adding a bite to the cold. Occasional gusts between 20-25 MPH have been observed. Visibility has been limited today to only 30-40 miles. The high so far today is 29F, 13 degrees below the daily normal high of 42F. The low since midnight is 24F, 2 degrees below the normal low of 26F. PRELIMINARY STATS FOR NOVEMBER 2020 TEMPERATURE, Deg. F Avg. Max. 56.3 [+6.3] Avg. Min. 38.6 [+5.1] Mean 47.5 [+5.8] 24-hour corrected mean: 46.9 Max. for month: 75F on the 7th Min. for month: 18F on the 19th HEATING DEGREE DAYS Total heating units: 521 [-177] Total for the season: 973 [-288] Total for last season: 1237 PRECIPITATION, Inches Total: 5.23 [+1.77] Greatest in 24 hrs: N/A SNOWFALL, Inches Total: TRACE Greatest in 24 hrs: T on the 2nd WIND, mph Avg. uncorrected wind speed: 12.9 mph Avg. corrected wind speed: 13.2 mph Prevailing wind direction: SSW [14%] Peak gust and direction: 81 SSE on the 30th SUNSHINE: Campbell-Stokes card minutes: 9066 minutes of a possible 17010 or 53% Astronomical total minutes: 9382 minutes of a possible 17593 or 53% Today's Observations: 7 A.M. Weather: Broken stratocumulus, overcast stratus, light snow shower Temperature: 25F; Dew Point: 20F; Relative Humidity: 81% Wind: N at 13G20 kts Sea-level pressure: 29.65 in Hg; rising, then falling Visibility: 30 miles 6-hr Max temp: 25F 6-hr Min temp: 24F 24-hr Precip: Trace. 24-hr Snow: Trace. Snow Depth: 1 ins. BHO SA 1155 E20 BKN 30 OVC 30SW- 042/25/20/3613G20/965/ HIER CLDS VSBL DSNT N-NNE PCPN VRY LGT/ 8/5// 4/001 50002 6000/ 70000 10025 20024 10 A.M. Weather: Broken stratocumulus, overcast stratus Temperature: 27F; Dew Point: 20F; Relative Humidity: 75% Wind: NW at 12G20 kts Sea-level pressure: 29.70 in Hg; rising, then more slowly Visibility: 40 miles, hazy 3-hr Precip: Trace. 3-hr Snow: Trace. BHO SA 1455 E20 BKN 40 OVC 40 056/27/20/3212G20/970/ HAZY/ 8/5// 51014 6000/ 1 P.M. Weather: Broken stratocumulus, broken stratocumulus standing lenticular, broken cirrus Temperature: 29F; Dew Point: 21F; Relative Humidity: 72% Wind: NW at 12G18 kts Sea-level pressure: 29.66 in Hg; rising, then falling Visibility: 40 miles, hazy 6-hr Max temp: 29F 6-hr Min temp: 25F 6-hr Precip: Trace. 6-hr Snow: Trace. Snow Depth: 1 ins. BHO SA 1755 E20 BKN 40 BKN 180 BKN 40 044/29/21/3212G18/966/ VIRGA DSNT E-ESE HAZY/ 8/502 4/001 58012 6000/ 10029 20025 SUMMARY FOR MONDAY, DECEMBER 7, 2020 TEMPERATURE (DEGREES F) MAX.......33 NORMAL.....42 MIN.......22 NORMAL.....27 MEAN......28 NORMAL.....34 DEPARTURE FROM 30-YEAR NORMAL................... -6 TOTAL DEPARTURE FOR THE MONTH................... +24 [+3.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............37 DEPARTURE.......+6 TOTAL HEATING UNITS FOR THE MONTH..............183 DEPARTURE......-24 TOTAL HEATING UNITS FOR THE SEASON............1156 DEPARTURE.....-313 TOTAL HEATING UNITS LAST SEASON TO DATE.......1495 DEPARTURE.....-339 PEAK WIND GUST FOR YESTERDAY (MPH): 420C/Official..............24 NW AT 10:25 A.M. AEROVANE (south tower).....26 NW AT 9:43 A.M. ASOS.......................25 NW AT 10:13 A.M. DAVIS #1...................25 W AT 1:08 A.M. DAVIS #2 (south tower).....24 WNW AT 9:47 A.M. RMY........................26 VECTOR.....................28 MERLIN.....................N/A FASTEST MILE FOR YESTERDAY: CONTACTING/OFFICIAL.............................18 W AT 1:04 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................17 NW AT 10:16 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............19 NW AT 10:15 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............18 W AT 1:13 A.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL...... 9.5 W [229 total miles] ASOS.....................10.0 [240 total miles] DAVIS #1.................10.2 NW [245 total miles] DAVIS #2.................10.3 NW [247 total miles] RMY...................... 9.2 NW [221 total miles] VECTOR...................10.0 [240 total miles] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M......TRACE DEPARTURE....-0.17 ASOS.............0.00 TOTAL PRECIPITATION FOR THE MONTH.............2.81 DEPARTURE....+1.65 ASOS.............2.89 TOTAL PRECIPITATION FOR THE YEAR.............47.38 DEPARTURE....-0.48 ASOS...........48.33 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HOURS ENDING 7 A.M.........TRACE DEPARTURE.....-0.3 TOTAL SNOWFALL FOR THE MONTH...................2.8 DEPARTURE.....+0.7 TOTAL SNOWFALL FOR THE SEASON..................9.3 DEPARTURE.....+4.6 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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 11/01 49/36/43/-3/0.69/0.0/006/01 38 W AERO 40 W RMY 39 11/02 40/31/36/-10/T/T/425/69 61 WNW AERO 62 WNW RMY 62 11/03 43/29/36/-10/0.00/0.0/473/77 48 WNW AERO 53 WNW RMY 48 11/04 54/30/42/-3/0.00/0.0/550/90 30 SSW AERO 30 SSW RMY 30 11/05 69/49/59/+14/0.00/0.0/548/90 37 SSW AERO 40 SSW RMY 38 11/06 72/55/64/+19/0.00/0.0/394/65 28 SW AERO 28 SW RMY M 11/07 75/54/65/+20/0.00/0.0/562/93 21 WSW AERO 21 WSW RMY 21 11/08 73/54/64/+20/0.00/0.0/584/97 18 W AERO 18 W RMY 19 11/09 74/52/63/+19/0.00/0.0/593/99 20 WSW AERO 18 WSW RMY 21 11/10 74/53/64/+20/0.00/0.0/597/100 30 SW AERO 28 SW RMY 31 11/11 73/58/66/+23/0.04/0.0/137/23 40 SW AERO 44 SW RMY 45 11/12 64/46/55/+12/0.04/0.0/000/00 32 NNW AERO 31 NNW RMY 33 11/13 48/38/43/0/0.30/0.0/000/00 22 NW AERO 21 NW RMY 25 11/14 49/32/41/-1/0.00/0.0/276/47 26 NW AERO 28 NW RMY 29 11/15 58/30/44/+2/0.62/0.0/311/53 60 S AERO 67 S RMY 65 11/16 53/39/46/+4/0.00/0.0/526/90 40 WNW AERO 41 WNW RMY 43 11/17 47/32/40/-1/0.00/0.0/204/35 28 NW AERO 28 NW RMY 30 11/18 32/19/26/-15/0.00/0.0/580/100 40 NW AERO 46 NW RMY 43 11/19 44/18/31/-10/0.00/0.0/393/68 37 SW AERO 39 SW RMY 43 11/20 63/44/54/+14/0.00/0.0/495/86 33 SSW AERO 35 SSW RMY 37 11/21 62/40/51/+11/0.00/0.0/339/59 24 W AERO 23 W RMY 27 11/22 45/33/39/-1/T/0.0/006/01 28 SE AERO 28 SE RMY 31 11/23 58/32/45/+6/1.77/0.0/000/00 42 WNW AERO 48 WNW RMY 46 TSTM 11/24 42/27/35/-4/0.00/0.0/569/100 31 WNW AERO 32 WNW RMY 33 11/25 50/26/38/-1/0.01/0.0/017/03 23 SSE AERO 23 SSE RMY 26 11/26 58/45/52/+14/0.36/0.0/000/00 36 S AERO 37 S RMY 41 11/27 53/46/50/+12/0.00/0.0/056/10 23 WNW AERO 23 WNW RMY 23 11/28 52/36/44/+6/T/0.0/180/32 28 WNW AERO 30 WNW RMY 27 11/29 52/33/43/+6/0.00/0.0/561/100 21 SSW AERO 21 SSW RMY 22 11/30 62/40/51/+14/1.35/0.0/000/00 81 SSE AERO 82 SSE RMY 86 DAILY RECORDS FOR NOVEMBER 2020 11/06/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 72F, BREAKS PREVIOUS RECORD OF 71F SET IN 1959 AND 2015 11/07/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 75F, TIES PREVIOUS RECORD OF 75F SET IN 1938 11/08/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 73F, BREAKS PREVIOUS RECORD OF 72F SET IN 1938 11/09/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 74F, BREAKS PREVIOUS RECORD OF 72F SET IN 1975 11/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 58F, BREAKS PREVIOUS RECORD OF 56F IN 2002 DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 73F, BREAKS PREVIOUS RECORD OF 68F IN 1984 PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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 12/01 62/40/51/+14/0.61/0.0/.../.. 60 S AERO 67 W RMY 64 12/02 42/32/37/+1/0.00/0.0/.../.. 32 SW AERO 32 SW RMY 35 12/03 49/30/40/+4/0.00/0.0/.../.. 25 SSW AERO 25 SSW RMY 28 12/04 58/40/49/+14/0.06/0.0/.../.. 35 SSW AERO 35 SSW RMY 37 12/05 42/32/37/+2/2.13/2.8/.../.. 58 NNW AERO 58 NNW RMY 67 12/06 34/26/30/-5/0.01/T/.../.. E44 WNW AERO 44 WNW RMY 49 12/07 33/22/28/-6/T/T/.../.. 24 NW AERO 26 NW RMY 26 12/08 The low since midnight is 24F, the daily normal low is 26F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR DECEMBER 8 HIGH 62 IN 1966 LOW -4 IN 1906 PRECIP 1.54 INS. IN 1969 SNOWFALL 2.5 INS. IN 2001 PEAK GUST 78e W IN 1979 RECORDS FOR DECEMBER 9 HIGH 68 IN 1966 LOW -14 IN 1902 PRECIP 3.23 INS. IN 2014 SNOWFALL 10.8 INS. IN 2005 PEAK GUST 66 SE IN 1973 TODAY'S REPORT PREPARED BY: Matt Douglas