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

WEDNESDAY, NOVEMBER 25, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

A CHILLY START, TURNING MUCH MILDER THIS AFTERNOON....

The day started on the chilly side ahead of a warm
front moving through the region today. Temperatures
rose from the mid 20s early this morning to the
upper 40s by early this afternoon, a rise of more 
than 20 degrees! All of this happening under cloudy
skies.

In addition to the rising temperatures, the air has
moistened up significantly as well. The dew point 
started the day around 20, but has now risen to the
upper 30s by the 1 P.M. observation. Normally you'd
see the relative humidity dropping during the day
(part of the diurnal cycle), however it's been 
rising steadily from 59% at 7 A.M. to 70% at 1 P.M.

Visibility has been rather limited today, starting 
the day around 50 miles, but slipping back to 40 miles
by mid morning with increasing haziness.

The high so far today is 49F, 2 degrees above the daily
normal high of 47F. The low since midnight is 26F, 
5 degrees below the normal low of 31F.  


Today's Observations:

7 A.M.
Weather: Overcast stratocumulus 
Temperature: 33F; Dew Point: 20F; Relative Humidity: 59%
Wind: SE at 7 kts
Sea-level pressure: 30.46 in Hg; falling unsteadily
Visibility: 50 miles
6-hr Max temp: 33F
6-hr Min temp: 26F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 E40 OVC 50 316/33/20/1207/046/ FEW BINOVC DSNT E-SE 
HIR CLDS VSBL DSNT E-SE THN K LYR ALNG HRZN ALQDS/ 8/5// 57003 
10033 20026

10 A.M.
Weather: Overcast stratocumulus
Temperature: 39F; Dew Point: 29F; Relative Humidity: 67%
Wind: SE at 12 kts
Sea-level pressure: 30.41 in Hg; falling, then more rapidly
Visibility: 40 miles, hazy
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 E30 OVC 40 299/39/29/1312/041/ FEW BINOVC DSNT S-SW 
HIR CLDS VSBL DSNT S-SW THN K LYR ALNG HRZN ALQDS HAZY/ 8/5// 
58017

1 P.M.
Weather: Broken stratocumulus, broken altostratus, 
overcast cirrostratus
Temperature: 48F; Dew Point: 39F; Relative Humidity: 70%
Wind: S at 8 kts
Sea-level pressure: 30.32 in Hg; falling, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 49F
6-hr Min temp: 33F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 E35 BKN 100 BKN 180 OVC 40 266/48/39/1808/032/ THN 
SPTS IOVC ALQDS SUN DMLY VSBL HAZY/ 8/557 58033 10049 20033


SUMMARY FOR TUESDAY, NOVEMBER 24, 2020

TEMPERATURE (DEGREES F)
MAX.......42   NORMAL.....47 
MIN.......27   NORMAL.....31
MEAN......35   NORMAL.....39

DEPARTURE FROM 30-YEAR NORMAL...................  -4
TOTAL DEPARTURE FOR THE MONTH...................+116 [+4.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............30  DEPARTURE...... +4
TOTAL HEATING UNITS FOR THE MONTH..............409  DEPARTURE.....-125
TOTAL HEATING UNITS FOR THE SEASON.............861  DEPARTURE.....-236
TOTAL HEATING UNITS LAST SEASON TO DATE.......1085  DEPARTURE.....-224

PEAK WIND GUST FOR YESTERDAY (MPH):
                     420C/Official..............31 WNW  AT  12:48 A.M.
                     AEROVANE (south tower).....32 WNW  AT  12:56 A.M.
                     ASOS.......................29 WNW  AT  12:49 A.M.
                     DAVIS #1...................29 WNW  AT  12:49 A.M.
                     DAVIS #2 (south tower).....30 NW   AT  12:54 A.M.
                     RMY........................33 
                     VECTOR.....................32
                     MERLIN.....................N/A

FASTEST MILE FOR YESTERDAY:
CONTACTING/OFFICIAL.............................21 NW   AT  12:58 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................20 NW   AT  12:56 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............21 NW   AT   1:03 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............21 WNW  AT  12:49 P.M.

AVERAGE WIND SPEED AND DIRECTION:
                    CONTACTING/OFFICIAL......12.3 WNW [294 total miles]
                    ASOS.....................11.5     [276 total miles]
                    DAVIS #1.................12.6 NW  [302 total miles]
                    DAVIS #2.................13.1 NW  [314 total miles]
                    RMY......................11.4 NNW [274 total miles]
                    VECTOR...................12.2     [293 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.............3.51  DEPARTURE....-0.28
                             ASOS.............3.60
TOTAL PRECIPITATION FOR THE YEAR.............44.68  DEPARTURE....-2.88
                              ASOS...........45.55

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.....-1.5
TOTAL SNOWFALL FOR THE SEASON..................6.5  DEPARTURE.....+4.7


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 The low since midnight is 26F, the daily normal low is 31F


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 25
HIGH 71 IN 1979
LOW 13 IN 1938
PRECIP 3.10 INCHES IN 1983
SNOWFALL 8.0 INS IN 1888
PEAK GUST 94e E IN 1950

RECORDS FOR NOVEMBER 26
HIGH 66 IN 1979
LOW 6 IN 1938
PRECIP 2.22 INS IN 1888
SNOWFALL 3.0 INS IN 1974
PEAK GUST 78 SSE IN 1964

TODAY'S REPORT PREPARED BY: Matt Douglas