BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, JANUARY 18, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0709E SUNSET:  1641E BLUSTERY, BUT MILD AND DRY TODAY AT BLUE HILL.... After an 8 day stretch of light winds last week, we're now on day 3 of gusty winds here on the summit. Peak gust so far today is 31 mph. Plenty of sun this morning has now been joined by convective stratocumulus clouds, making for a mix of sun and clouds early this afternoon. Visibility has improved from 40 miles early this morning to 60 miles early this afternoon. The stretch of above normal temperatures continues as well. Today marks the 29th consecutive day of above normal temperatures, stretching back to December 21st! The high temperature so far today is 43F, this is 10 degrees above the daily normal maximum of 33F. The low since midnight is 34F, 17 degrees above the normal minimum of 17F. Today's Observations: 7 A.M. Weather: Clear, few altocumulus/altostratus all quadrants, few cirrus distant E-ESE Temperature: 34F; Dew Point: 25F; Relative Humidity: 69% Wind: SW @ 10G16 kts Sea-level pressure: 29.63 in Hg; falling then rising Visibility: 40 miles, hazy 6-hr Max temp: 36F 6-hr Min temp: 34F 24-hr Precip: 0.00 ins. 24-hr Snow: 0.0 ins. Snow Depth: 0 ins. BHO SA 1155 CLR 40 034/34/25/2210G16/963/ FEW AC/AS ALQDS FEW CI DSNT E-ESE HAZY/ 8/071 53003 10036 20034 10 A.M. Weather: Clear, few stratocumulus all quadrants, few altocumulus all quadrants Temperature: 39F; Dew Point: 27F; Relative Humidity: 61% Wind: WSW @ 10G18 kts Sea-level pressure: 29.64 in Hg; rising, then falling Visibility: 60 miles 3-hr Precip: 0.00 ins. 3-hr Snow: 0.0 ins. BHO SA 1455 CLR 60 038/39/27/2410G18/964/ FEW SC ALQDS FEW AC ALQDS/ 8/570 53004 1 P.M. Weather: Broken stratocumulus, broken cirrus, virga distant WNW-N-NE Temperature: 43F, Dew point: 22F; Relative Humidity: 42% Wind: W @ 16G27 kts, peak of 31 mph W at 12:48 P.M. Sea-level pressure: 29.58 inches Hg, falling, then more rapidly Visibility: 60 miles 6-hr Max temp: 43F 6-hr Min temp: 34F 6-hr Precip: 0.00 ins. 6-hr Snow: 0.0 ins. Snow Depth: 0 ins. BHO SA 1755 E45 BKN 250 BKN 60 018/43/22/2616G27/958/ VIRGA DSNT WNW-N-NE PK WND 2627/48/ 8/501 58020 10043 20034 SUMMARY FOR SUNDAY, JANUARY 17, 2021 TEMPERATURE (DEGREES F) MAX.......41   NORMAL.....33 MIN.......32   NORMAL.....17 MEAN......37   NORMAL.....25 DEPARTURE FROM 30-YEAR (1981-2010) NORMAL.......+12 TOTAL DEPARTURE FOR THE MONTH...................+128 [+7.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............28  DEPARTURE......-12 TOTAL HEATING UNITS FOR THE MONTH..............541  DEPARTURE.....-127 TOTAL HEATING UNITS FOR THE SEASON............2471  DEPARTURE.....-501 TOTAL HEATING UNITS LAST SEASON TO DATE.......2749  DEPARTURE.....-278 PEAK WIND GUST (MPH):                      420C/Official..............47 W   @  2:33 P.M.                      AEROVANE (south tower).....46 W   @  2:33 P.M.                      ASOS.......................46 W   @  2:32 P.M.                      DAVIS #1...................49 WNW @  2:23 P.M.                      DAVIS #2 (south tower).....46 W   @  2:31 P.M.                      RMY........................54     @  2:31 P.M.                      VECTOR.....................52     @  2:31 P.M.                      MERLIN.....................48 FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................35 W   @ 11:00 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................33 W   @  2:33 P.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............36 W   @  2:33 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............36 W   @  2:33 P.M. MAXIMUM 2-MINUTE RMY AVERAGE....................33 W   @ 10:58 A.M. MAXIMUM 2-MINUTE VECTOR AVERAGE.................32     @ 10:59 A.M. AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL...19.6 WSW [471 total miles]                      ASOS..................18.7     [449 total miles]                      DAVIS #1..............19.9 W   [478 total miles]                      DAVIS #2..............19.4 W   [466 total miles]                      RMY...................18.0 W   [432 total miles]                      VECTOR................18.3     [439 total miles] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00  DEPARTURE....-0.14                              ASOS.............0.00 TOTAL PRECIPITATION FOR THE MONTH.............1.94  DEPARTURE....-0.48                              ASOS.............2.00 TOTAL PRECIPITATION FOR THE YEAR..............1.94  DEPARTURE....-0.48                               ASOS............2.00 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HOURS ENDING 7 A.M...........0.0  DEPARTURE.....-0.5 TOTAL SNOWFALL FOR THE MONTH.................. 1.9  DEPARTURE.....-7.6 TOTAL SNOWFALL FOR THE SEASON.................28.1  DEPARTURE.....+2.6 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 The low since midnight is 34F, 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 18 HIGH 62F IN 1973,1990 LOW -10F IN 1982 PRECIP 1.68 INS. IN 1915 SNOWFALL 13.0 INS. IN 1948 PEAK GUST 85 MPH SSE IN 2006 RECORDS FOR JANUARY 19 HIGH 59F IN 1973 LOW -11F IN 1887 PRECIP 2.34 INS. IN 1936 SNOWFALL 10.5 INS. IN 1936 PEAK GUST 93e MPH WNW IN 1943 TODAY'S REPORT PREPARED BY: Matt Douglas