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Sunday, January 24, 2021

January 24, 2021

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, JANUARY 24, 2021 ALL TIMES ARE…

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

SUNDAY, JANUARY 24, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0705E
SUNSET:  1648E

CHILLY WITH A STRONG WESTERLY WIND, AND
EXCELLENT VISIBILITY….

Today we observed 85 miles of visibility, and daytime
temperatures were again colder than normal despite
abundant sunshine. The weather continues to be dry,
as the dew point is currently in the low single digits.

We are seeing a consistent 25 mph wind from the west,
with frequent gusts above 30 mph. The max gust so far
is 40 mph, being seen after the 1 P.M. observation.

We are slowly falling off in terms of precipitation,
being at a 1.32 inch rainfall deficit. The monthly
deficit for snow is more than 10 inches, but on the
season we are only 0.6 inches below normal. The current
seasonal total is 28.2 inches.

The high temperature so far today is 28F, this is 6 degrees
below the daily normal maximum of 34F. The low since midnight
is 13F, which is 4 degrees below the normal minimum of 17F.

Today’s Observations:

7 A.M.
Weather: Clear, few cumulus offshore
Temperature: 15F; Dew Point: 3F; Relative Humidity: 59%
Wind: WNW @ 18G31 kts, peak of 37 mph at 6:32 A.M.
Sea-level pressure: 29.95 in Hg; rising unsteadily
Visibility: 65 miles
6-hr Max temp: 15F
6-hr Min temp: 13F
24-hr Precip: 0.00 ins.
24-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 CLR 65 142/15/3/3018G31/995/ FEW CU OFFSHR PK
WND 2832/32/ 8/100 52011 10015 20013

10 A.M.
Weather: Clear, few cumulus offshore
Temperature: 23F; Dew Point: 3F; Relative Humidity: 43%
Wind: WNW @ 17G29 kts, peak of 37 mph at 8:58 A.M.
Sea-level pressure: 29.95 in Hg; falling then rising
Visibility: 85 miles
3-hr Precip: 0.00 ins.
3-hr Snow: 0.0 ins.
BHO SA 1455 CLR 85 142/23/3/3017G29/995/ FEW CU OFFSHR PK
WND 2932/1358/ 8/100 51000

1 P.M.
Weather: Clear, few cumulus
Temperature: 28F, Dew point: 4F; Relative Humidity: 36%
Wind: WNW @ 20G32 kts, peak of 37 mph at 12:44 P.M.
Sea-level pressure: 29.88 inches Hg, falling steadily
Visibility: 85 miles
6-hr Max temp: 28F
6-hr Min temp: 14F
6-hr Precip: 0.00 ins.
6-hr Snow: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 CLR 85 118/28/4/3020G32/988/ FEW CU ALQDS PK
WND 2932/44/ 8/100 58024 10028 20014

SUMMARY FOR SATURDAY, JANUARY 23, 2021

TEMPERATURE (DEGREES F)
MAX…….29   NORMAL…..34
MIN…….14   NORMAL…..17
MEAN……22   NORMAL…..25

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……..-3
TOTAL DEPARTURE FOR THE MONTH……………….+156 [+6.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………43  DEPARTURE……+3
TOTAL HEATING UNITS FOR THE MONTH…………..753  DEPARTURE…..-156
TOTAL HEATING UNITS FOR THE SEASON…………2683  DEPARTURE…..-530
TOTAL HEATING UNITS LAST SEASON TO DATE…….2994  DEPARTURE…..-311

PEAK WIND GUST (MPH):
420C/Official…………..41 WNW @  4:19 P.M.
AEROVANE (south tower)…..41 WNW @  4:19 P.M.
ASOS…………………..40 NW  @  8:49 P.M.
DAVIS #1……………….41 NW  @ 12:47 P.M.
DAVIS #2 (south tower)…..39 WNW @  9:18 P.M.
RMY……………………46     @ 12:46 P.M
VECTOR…………………45     @ 12:47 P.M.
MERLIN…………………45

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………26 WNW @  5:02 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….25 WNW @  5:10 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 WNW @  9:19 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 WNW @  3:17 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..25 NW  @  5:07 P.M.
MAXIMUM 2-MINUTE VECTOR AVERAGE……………..26     @  9:16 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…17.4 WNW [417 total miles] ASOS………………16.6     [398 total miles] DAVIS #1…………..17.6 NW  [422 total miles] DAVIS #2…………..18.3 NW  [439 total miles] RMY……………….15.9 NW  [382 total miles] VECTOR…………….17.0     [399 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….-1.32
ASOS………….2.00
TOTAL PRECIPITATION FOR THE YEAR…………..1.94  DEPARTURE….-1.32
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….-10.8
TOTAL SNOWFALL FOR THE SEASON……………..28.2  DEPARTURE…..-0.6

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/+7/0.00/0.0/438/78       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/…./…/…/..      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  The low since midnight is 13F, 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 24
HIGH 60F IN 1967
LOW -12F IN 1907
PRECIP 2.04 INS. IN 1998
SNOWFALL 11.3 INS. IN 1935
PEAK GUST 82 MPH S IN 1996

RECORDS FOR JANUARY 25
HIGH 56F IN 2010
LOW -10F IN 1935
PRECIP 2.24 INS. IN 1979
SNOWFALL 12.5 INS. IN 1941
PEAK GUST 81 MPH WNW IN 1972

TODAY’S REPORT PREPARED BY: Benjamin Turner

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Blue Hill Observatory & Science Center · Legal

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

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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