BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, JANUARY 20, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0708E SUNSET:  1643E MOSTLY CLOUDY WITH LIMITED VISIBILITY ATOP GREAT BLUE HILL.... Today was on the hazier side, only allowing 45 miles for the maximum visibility. Skies were mostly cloudy, opening up slightly in the early afternoon. A quick snow shower moved in around 2 P.M., ending shortly after it started. The stretch of above normal temperatures continues as well. Today will likely mark the 31st consecutive day of above normal temperatures, stretching back to December 21st! -Temperature section written by Matt Douglas The high temperature so far today is 36F, this is 3 degrees above the daily normal maximum of 33F. The low since midnight is 28F, 11 degrees above the normal minimum of 17F. Today's Observations: 7 A.M. Weather: Overcast altostratus Temperature: 29F; Dew Point: 20F; Relative Humidity: 70% Wind: WSW @ 5 kts, light Sea-level pressure: 29.85 in Hg; falling unsteadily Visibility: 25 miles, hazy 6-hr Max temp: 29F 6-hr Min temp: 28F 24-hr Precip: 0.00 ins. 24-hr Snow: 0.0 ins. Snow Depth: 0 ins. BHO SA 1155 100 OVC 25 110/29/20/2505/985/ HAZY WND LGT/ 8/02/ 56018 10029 20028 10 A.M. Weather: Overcast altostratus Temperature: 31F; Dew Point: 22F; Relative Humidity: 68% Wind: WNW @ 5 kts, light Sea-level pressure: 29.84 in Hg; rising, then falling Visibility: 30 miles, hazy 3-hr Precip: 0.00 ins. 3-hr Snow: 0.0 ins. BHO SA 1455 100 OVC 30 106/31/22/2905/984/ HAZY WND LGT/ 8/02/ 57004 1 P.M. Weather: Scattered altocumulus, broken cirrostratus Temperature: 35F, Dew point: 20F; Relative Humidity: 54% Wind: NW @ 10G16 kts Sea-level pressure: 29.78 inches Hg, falling unsteadily Visibility: 45 miles 6-hr Max temp: 36F 6-hr Min temp: 29F 6-hr Precip: 0.00 ins. 6-hr Snow: 0.0 ins. Snow Depth: 0 ins. BHO SA 1755 70 SCT 250 BKN 45 088/35/20/3310G16/978/ 8/086 56018 10036 20029 SUMMARY FOR TUESDAY, JANUARY 19, 2021 TEMPERATURE (DEGREES F) MAX.......39   NORMAL.....33 MIN.......23   NORMAL.....17 MEAN......31   NORMAL.....25 DEPARTURE FROM 30-YEAR (1981-2010) NORMAL.......+6 TOTAL DEPARTURE FOR THE MONTH...................+177 [+9.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............34  DEPARTURE......-6 TOTAL HEATING UNITS FOR THE MONTH..............605  DEPARTURE.....-143 TOTAL HEATING UNITS FOR THE SEASON............2535  DEPARTURE.....-517 TOTAL HEATING UNITS LAST SEASON TO DATE.......2830  DEPARTURE.....-295 PEAK WIND GUST (MPH):                      420C/Official..............25 WNW @ 12:07 P.M.                      AEROVANE (south tower).....25 WNW @ 11:28 A.M.                      ASOS.......................24 WNW @ 12:06 P.M.                      DAVIS #1...................25 WNW @ 12:06 P.M.                      DAVIS #2 (south tower).....26 WNW @ 12:07 P.M.                      RMY........................27     @  3:55 P.M.                      VECTOR.....................27     @  3:55 P.M.                      MERLIN.....................26 FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................18 WNW @ 12:06 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................17 WNW @ 12:08 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............19 NW  @ 12:08 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............20 NW  @ 12:08 P.M. MAXIMUM 2-MINUTE RMY AVERAGE....................18 NW  @ 12:06 P.M. MAXIMUM 2-MINUTE VECTOR AVERAGE.................18     @ 12:05 P.M. AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL...10.9 WNW [261 total miles]                      ASOS..................10.5     [253 total miles]                      DAVIS #1..............11.7 WNW [280 total miles]                      DAVIS #2..............11.9 WNW [286 total miles]                      RMY...................10.3 WNW [246 total miles]                      VECTOR................11.0     [257 total miles] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00  DEPARTURE....-0.13                              ASOS.............0.00 TOTAL PRECIPITATION FOR THE MONTH.............1.94  DEPARTURE....-0.76                              ASOS.............2.00 TOTAL PRECIPITATION FOR THE YEAR..............1.94  DEPARTURE....-0.76                               ASOS............2.00 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HOURS ENDING 7 A.M...........0.0  DEPARTURE.....-0.6 TOTAL SNOWFALL FOR THE MONTH.................. 1.9  DEPARTURE.....-8.8 TOTAL SNOWFALL FOR THE SEASON.................28.1  DEPARTURE.....+1.4 PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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 01/01   36/25/31/+4/0.06/0.3/330/60       23 E    AERO 23 NNW  RMY 23 01/02   43/30/37/+10/0.30/T/116/21        37 WNW  AERO 39 WNW  RMY 44 01/03   33/27/30/+4/0.07/0.8/000/00       23 NNE  AERO 22 NNE  RMY 25 01/04   37/28/33/+7/0.01/0.1/110/20       25 NNE  AERO 23 NNE  RMY 27 01/05   31/28/30/+4/0.05/0.7/000/00       21 NNW  AERO 21 NNW  RMY 22 01/06   38/28/33/+7/T/T/244/44            30 NW   AERO 29 NW   RMY 32 01/07   42/26/34/+8/0.00/0.0/516/93       28 NNW  AERO 26 NNW  RMY 31 01/08   40/21/31/+5/0.00/0.0/517/93       25 NNW  AERO 22 NNW  RMY 25 01/09   34/30/27/+1/0.00/0.0/395/71       25 N    AERO 23 N    RMY 24 01/10   39/24/32/+7/0.00/0.0/493/88       25 NNW  AERO 23 NNW  RMY 24 01/11   34/25/30/+5/0.00/0.0/000/00       17 SW   AERO 16 SSW  RMY 16 01/12   40/24/32/+7/0.00/0.0/.../..       23 WNW  AERO 23 WNW  RMY 24 01/13   40/26/33/+8/0.00/0.0/.../..       15 SW   AERO 14 SW   RMY 19 01/14   38/31/35/+10/0.09/T/.../..        16 SSW  AERO 16 SSW  RMY 19 01/15   40/32/36/+11/0.00/0.0/.../..      25 ESE  AERO 23 ESE  RMY 27 TSTM 01/16   52/33/43/+18/1.00/0.0/.../..      48 ESE  AERO 53 SE   RMY 54 01/17   41/32/37/+12/0.00/0.0/.../..      47 W    AERO 46 W    RMY 54 01/18   42/27/35/+10/T/0.0/.../..         35 W    AERO 37 WNW  RMY 36 01/19   39/23/31/+6/..../.../.../..       25 WNW  AERO 25 WNW  RMY 27 01/20 The low since midnight is 28F, the daily normal low is 17F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 20 HIGH 59F IN 1951 LOW -9F IN 1901 PRECIP 1.95 INS. IN 1978 SNOWFALL 19.0 INS. IN 1978 PEAK GUST 76e MPH NE IN 1978 RECORDS FOR JANUARY 21 HIGH 65F IN 1906 LOW -4F IN 1888,1893 PRECIP 2.49 INS. IN 1979 SNOWFALL 9.0 INS. IN 2014 PEAK GUST 78e MPH SE IN 1979 TODAY'S REPORT PREPARED BY: Benjamin Turner