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Tuesday, January 26, 2021

January 26, 2021

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, JANUARY 26, 2021 ALL TIMES ARE…

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

TUESDAY, JANUARY 26, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0703E
SUNSET:  1651E

INCREASING CLOUDS AND CHILLY WITH AN ONSHORE WIND….

After a decent amount of sunshine through mid morning, clouds
have quickly increased from both the west-southwest and from
the east. The former being mid level clouds ahead of a system
approaching the region and the latter low clouds pushing in
from off the ocean. Eventually we expect some snow to develop
later this afternoon.

Wind started the day out of the north but has since veered
through the northeast to east. However speeds have been on
the light side averaging around 8 mph since 7 A.M. with a
peak gust of 21 mph.

Visibility has been sitting around 60 miles all day with a bit
of haziness in the air under an inversion.

The high temperature so far today is 36F, this is 2 degrees
above the daily normal maximum of 34F. The low since midnight
is 20F, which is 3 degrees above the normal minimum of 17F.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, few stratocumulus offshore distant ENE-SE,
thin smoke layer along horizon all quadrants
Temperature: 20F; Dew Point: 14F; Relative Humidity: 77%
Wind: N @ 9 kts
Sea-level pressure: 30.07 in Hg; falling, then rising
Visibility: 60 miles
6-hr Max temp: 23F
6-hr Min temp: 20F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 120 SCT 60 183/20/14/3609/007/ FEW SC OFFSHR DSNT ENE-SE
THN K LYR ALNG HRZN ALQDS/ 8/550 55001 10023 20020

10 A.M.
Weather: Scattered altocumulus, scattered cirrus, few stratocumulus ENE-SE,
thin smoke layer along horizon all quadrants
Temperature: 30F; Dew Point: 18F; Relative Humidity: 61%
Wind: NE @ 6 kts
Sea-level pressure: 30.07 in Hg; rising, then falling
Visibility: 60 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 120 SCT 200 SCT 60 182/30/18/0506/007/ FEW SC ENE-SE
THN K LYR ALNG HRZN ALQDS/ 8/551 58001

1 P.M.
Weather: Scattered stratocumulus, overcast altocumulus/altostratus,
breaks in overcast distant NNW-NE, virga distant SW-W
Temperature: 34F, Dew point: 21F; Relative Humidity: 59%
Wind: E @ 7 kts
Sea-level pressure: 30.01 inches Hg, rising, then falling
Visibility: 60 miles
6-hr Max temp: 36F
6-hr Min temp: 20F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 30 SCT E90 OVC 60 163/34/21/0807/001/ BINOVC DSNT NNW-NE
VIRGA DSNT SW-W/ 8/57/ 58019 10036 20020

SUMMARY FOR MONDAY, JANUARY 25, 2021

TEMPERATURE (DEGREES F)
MAX…….35   NORMAL…..34
MIN…….15   NORMAL…..17
MEAN……25   NORMAL…..25

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……..  0
TOTAL DEPARTURE FOR THE MONTH……………….+152 [+5.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………40  DEPARTURE……  0
TOTAL HEATING UNITS FOR THE MONTH…………..837  DEPARTURE…..-152
TOTAL HEATING UNITS FOR THE SEASON…………2767  DEPARTURE…..-526
TOTAL HEATING UNITS LAST SEASON TO DATE…….3043  DEPARTURE…..-276

PEAK WIND GUST (MPH):
420C/Official…………..28 NW  @ 12:26 A.M.
AEROVANE (south tower)…..29 NW  @ 10:29 A.M.
ASOS…………………..28 NW  @ 12:26 A.M.
DAVIS #1……………….29 NW  @ 12:25 A.M.
DAVIS #2 (south tower)…..28 NW  @ 12:06 A.M.
RMY……………………30     @ 12:24 A.M
VECTOR…………………30     @ 12:25 A.M.
MERLIN…………………N/A

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………21 WNW @  6:31 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….20 NW  @ 10:30 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 NW  @ 10:30 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 WNW @ 12:07 A.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..20 NW  @ 10:27 A.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..20     @ 10:28 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…12.6 NW  [302 total miles] ASOS………………11.8     [283 total miles] DAVIS #1…………..12.9 NW  [310 total miles] DAVIS #2…………..13.2 NW  [317 total miles] RMY……………….12.0 NNW [288 total miles] VECTOR…………….12.6     [302 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….-1.60
ASOS………….2.00
TOTAL PRECIPITATION FOR THE YEAR…………..1.94  DEPARTURE….-1.60
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……………… 2.0  DEPARTURE….-11.9
TOTAL SNOWFALL FOR THE SEASON……………..28.2  DEPARTURE…..-1.7

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/+7/0.00/0.0/438/78       23 WNW  AERO 23 WNW  RMY 24
01/13   40/26/33/+8/0.00/0.0/389/69       15 SW   AERO 14 SW   RMY 19
01/14   38/31/35/+10/0.09/T/000/00        16 SSW  AERO 16 SSW  RMY 19
01/15   40/32/36/+11/0.00/0.0/266/47      25 ESE  AERO 23 ESE  RMY 27 TSTM
01/16   52/33/43/+18/1.00/0.0/000/00      48 ESE  AERO 53 SE   RMY 54
01/17   41/32/37/+12/0.00/0.0/314/55      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/T/T/…/..            25 WNW  AERO 25 WNW  RMY 27
01/20   37/22/30/+5/T/T/…/..            32 WNW  AERO 33 WNW  RMY 34
01/21   31/17/24/-1/T/0.1/…/..          23 WNW  AERO 24 SSW  RMY 24
01/22   42/29/36/+11/0.00/0.0/…/..      28 WNW  AERO 24 WNW  RMY 29
01/23   29/14/22/-3/0.00/0.0/…/..       41 WNW  AERO 41 WNW  RMY 46
01/24   29/13/21/-4/0.00/0.0/…/..       43 WNW  AERO 48 WNW  RMY 44
01/25   35/15/25/0/0.00/0.0/…/..        28 NW   AERO 29 NW   RMY 30

01/26  The low since midnight is 20F, 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 26
HIGH 68F IN 1950 [RECORD FOR MONTH] LOW -5F IN 1920
PRECIP 1.60 INS. IN 1958
SNOW 9.0 INS. IN 1898
WIND 90e MPH SE IN 1978

RECORDS FOR JANUARY 27
HIGH 63F IN 1974
LOW -12F IN 1924
PRECIP 1.59 INS. IN 1996
SNOWFALL 25.2 INS. IN 2015 [RECORD FOR MONTH] PEAK GUST 91 MPH SSE IN 1996

TODAY’S REPORT PREPARED BY: Matt Douglas

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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