Saturday, November 28, 2020

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

SATURDAY, NOVEMBER 28, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

A NICE LATE FALL DAY ATOP GREAT BLUE HILL….

Today we observed improving conditions as the day went on,
including the sun breaking out of the clouds a little before
the 1 P.M. observation. Wind was westerly, at 16 mph on average
with a peak gust around 23 mph. Visibility went from 20 miles
this morning to almost 70 miles this afternoon, despite
humidity holding in the mid-50 percents and a steady drop in
pressure.

The high so far today is 51F, 5 degrees above the daily normal
high of 46F. The low since midnight is 43F, 13 degrees above the
normal low of 30F.

Today’s Observations:

7 A.M.
Weather: Broken altostratus
Temperature: 43F; Dew Point: 39F; Relative Humidity: 85%
Wind: NW at 7 kts
Sea-level pressure: 29.93 in Hg; steady, then rising
Visibility: 20 miles (thin fog)
6-hr Max temp: 46F
6-hr Min temp: 43F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 65 BKN 20 135/43/39/3107/993/ THN F ALQDS/ 8/010
52001 10046 20043

10 A.M.
Weather: Overcast stratocumulus
Temperature: 47F; Dew Point: 39F; Relative Humidity: 75%
Wind: W at 7 kts
Sea-level pressure: 29.94 in Hg; rising, then falling
Visibility: 35 miles, hazy
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 65 OVC 35 138/47/39/2807/994/ HAZY/ 8/01/ 51003

1 P.M.
Weather: Broken Stratocumulus and altostratus
Temperature: 50F; Dew Point: 37F; Relative Humidity: 59%
Wind: W at 14G20 kts
Sea-level pressure: 29.90 in Hg; falling, then falling more slowly
Visibility: 65 miles
6-hr Max temp: 51F
6-hr Min temp: 43F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 35 BKN 140 BKN 65 124/50/37/2814G20/990/ 8/810
56014 10051 20043

SUMMARY FOR FRIDAY, NOVEMBER 27, 2020

TEMPERATURE (DEGREES F)
MAX…….53   NORMAL…..46
MIN…….46   NORMAL…..30
MEAN……50   NORMAL…..38

DEPARTURE FROM 30-YEAR NORMAL………………..+13
TOTAL DEPARTURE FOR THE MONTH……………….+142 [+5.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………15  DEPARTURE……-13
TOTAL HEATING UNITS FOR THE MONTH…………..464  DEPARTURE…..-151
TOTAL HEATING UNITS FOR THE SEASON………….916  DEPARTURE…..-262
TOTAL HEATING UNITS LAST SEASON TO DATE…….1143  DEPARTURE…..-227

PEAK WIND GUST FOR YESTERDAY (MPH):
420C/Official…………..23 WNW  AT   5:38 A.M.
AEROVANE (south tower)…..23 WNW  AT   5:28 A.M.
ASOS…………………..22 WNW  AT   5:38 A.M.
DAVIS #1……………….22 WNW  AT   5:38 A.M.
DAVIS #2 (south tower)…..23 W    AT   5:38 A.M.
RMY……………………23
VECTOR…………………24
MERLIN…………………N/A

FASTEST MILE FOR YESTERDAY:
CONTACTING/OFFICIAL………………………..16 NW   AT   6:14 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 NW   AT   6:15 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 NW   AT   5:51 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 WNW  AT   4:46 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…… 8.3 W    [200 total miles] ASOS………………… 8.8      [211 total miles] DAVIS #1…………….. 8.9 WNW  [214 total miles] DAVIS #2…………….. 9.1 WNW  [218 total miles] RMY…………………. 8.2 W    [197 total miles] VECTOR………………. 8.7      [202 total miles]

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………….3.88  DEPARTURE….-0.39
ASOS………….3.97
TOTAL PRECIPITATION FOR THE YEAR………….45.05  DEPARTURE….-2.99
ASOS………..45.92

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HOURS ENDING 7 A.M………..0.0  DEPARTURE…..-0.1
TOTAL SNOWFALL FOR THE MONTH……………..Trace  DEPARTURE…..-1.8
TOTAL SNOWFALL FOR THE SEASON………………6.5  DEPARTURE…..+4.4

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/…/..     40 SW    AERO 44 SW   RMY 45
11/12   64/46/55/+12/0.04/0.0/…/..     32 NNW   AERO 31 NNW  RMY 33
11/13   48/38/43/0/0.30/0.0/…/..       22 NW    AERO 21 NW   RMY 25
11/14   49/32/41/-1/0.00/0.0/…/..      26 NW    AERO 28 NW   RMY 29
11/15   58/30/44/+2/0.62/0.0/…/..      60 S     AERO 67 S    RMY 65
11/16   53/39/46/+4/0.00/0.0/…/..      40 WNW   AERO 41 WNW  RMY 43
11/17   47/32/40/-1/0.00/0.0/…/..      28 NW    AERO 28 NW   RMY 30
11/18   32/19/26/-15/0.00/0.0/…/..     40 NW    AERO 46 NW   RMY 43
11/19   44/18/31/-10/0.00/0.0/…/..     37 SW    AERO 39 SW   RMY 43
11/20   63/44/54/+14/0.00/0.0/…/..     33 SSW   AERO 35 SSW  RMY 37
11/21   62/40/51/+11/0.00/0.0/…/..     24 W     AERO 23 W    RMY 27
11/22   45/33/39/-1/T/0.0/…/..         28 SE    AERO 28 SE   RMY 31
11/23   58/32/45/+6/1.77/0.0/…/..      42 WNW   AERO 48 WNW  RMY 46 TSTM
11/24   42/27/35/-4/0.00/0.0/…/..      31 WNW   AERO 32 WNW  RMY 33
11/25   50/26/38/-1/…./0.0/…/..      23 SSE   AERO 23 SSE  RMY 26
11/26   58/45/52/+14/…/0.0/…/..      36 S     AERO 37 S    RMY 41
11/27   53/46/50/+12/…./…/…/..     23 WNW   AERO 23      RMY 23

11/28 The low since midnight is 43F, the daily normal low is 30F

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

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR NOVEMBER 28
HIGH 70 IN 1990
LOW 10 IN 1901,1930,1936
PRECIP 1.84 INCHES IN 1889
SNOWFALL 3.0 INS IN 1917
PEAK GUST 90 SSW IN 1958

RECORDS FOR NOVEMBER 29
HIGH 66 IN 2011
LOW 6 IN 1901
PRECIP 2.69 INCHES IN 1963
SNOWFALL 6.0 INS IN 2012
PEAK GUST 86 SSE IN 1963

TODAY’S REPORT PREPARED BY: Benjamin Turner