Friday, January 21, 2022

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

FRIDAY, JANUARY 21, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0707E
SUNSET:  1644E

A CALMER DAY ON THE SUMMIT WITH VIEWS OF SNOW TO THE EAST….

Today was partly cloudy with a good average visibility of
70 miles. Wind was quiet for the most part, being a gentle
yet chilly north westerly breeze. Wind chill this morning was
-12 degrees at the 7 A.M. observation.

We maintained a snow depth of an inch overnight, rounded up
from the 0.6 inches of snow we received yesterday. Event total
liquid precipitation was 0.17 inches. Snowfall occurred 20 miles
to the east of the observatory, limiting visibility for the
entirety of the 6-hour observation period.

The high so far today is 17F, this is 17 degrees below the normal
high of 34F. The low since midnight is 6F, which is 11 degrees
below the normal low of 17F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken cirrostratus, few stratocumulus offshore
Temperature: 6F; Dew Point: -4F; Relative Humidity: 63%
Wind: N @ 12G17 kts
Sea-level pressure: 1032.3 mb; 30.48 in. Hg: rising, then
more rapidly
Visibility: 40 miles, then 20 miles NE-E-SE due to some
ocean effect snow bands
6-hr Max temp: 14F
6-hr Min temp:  6F
24-hr Precip:  0.09 ins.
24-hr Snowfall: 0.6 ins.
Snow Depth: 1 inch
BHO SA 1155 250 BKN 40 323/6/-4/3612G17/048/ FEW SC OFFSHR
NE-E-SE VIRGA NE-E-SE VSBY 20 MI NE-E-SE WIND CHILL -12F
NEW SNW PST 24 HRS 0.6 INS/ 8/506 4/001 53027 70009 10014
20006

10 A.M.
Weather: Broken cirrostratus, few stratocumulus offshore
Temperature: 10F; Dew Point: 1F; Relative Humidity: 66%
Wind: N @ 8G14 kts
Sea-level pressure: 1035.5 mb; 30.55 in Hg; rising, then
more slowly
Visibility: 75 miles, then 20 miles NE-E-SE due to some
ocean effect snow bands
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 250 BKN 75 355/10/1/3608G14/055/ FEW SC OFFSHR
NE-E-SE VIRGA NE-E-SE VSBY 20 MI NE-E-SE/ 8/506 51022

1 P.M.
Weather: Broken cirrostratus, few stratocumulus offshore
Temperature: 17F, Dew point: -1F; Relative Humidity: 45%
Wind: NNW @ 7G12 kts
Sea-level pressure: 1034.6 mb; 30.52 in Hg; falling, then
more rapidly
Visibility: 75 miles, then 20 miles NE-E-SE due to some
ocean effect snow bands
6-hr Max temp: 17F
6-hr Min temp: 5F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1755 250 BKN 75 346/17/-1/3407G12/052/ FEW SC OFFSHR
NE-E-SE VIRGA NE-E-SE VSBY 20 MI NE-E-SE/ 8/506 58009 10017
20005

SUMMARY FOR THURSDAY, JANUARY 20, 2022

TEMPERATURE (DEGREES F)
MAX…….38     NORMAL…..34
MIN…….16     NORMAL…..18
MEAN……27     NORMAL…..26

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+1
TOTAL DEPARTURE FOR THE MONTH……………………….+2 [-0.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………38  DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH…………..759  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE SEASON…………2645  DEPARTURE……-327
TOTAL HEATING UNITS LAST SEASON TO DATE…….2570  DEPARTURE…….+75

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….34 N   @  8:52 P.M.
AEROVANE……………….35 N   @  8:52 P.M.
VECTOR #2 (Instantaneous)..36     @  8:52 P.M.
DAVIS #2 ………………30 N   @  9:37 P.M.
RMY #2 (Instantaneous)…..34 N   @  8:52 P.M.
ASOS………..OUT OF SERVICE D/T RENOVATIONS
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
RMY #1………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………21 N   @  8:51 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22     @  8:54 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 N   @  8:54 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 N   @  8:54 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY #1 AVERAGE…..OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…..10.5 NNW  [252 total miles] VECTOR #2……………10.8
DAVIS #2…………….10.5 NW
RMY #2………………11.0 NW
RMY #1…………..OUT OF SERVICE D/T RENOVATIONS
ASOS…………….OUT OF SERVICE D/T RENOVATIONS
VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.09  DEPARTURE…..-0.04
TOTAL PRECIPITATION FOR THE MONTH………….2.68  DEPARTURE…..-0.29
TOTAL PRECIPITATION FOR THE YEAR…………. 2.68  DEPARTURE…..-0.29

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.6  DEPARTURE……+0.0
TOTAL SNOWFALL FOR THE MONTH………………16.7  DEPARTURE……+5.2
TOTAL SNOWFALL FOR THE SEASON (2021-2022)…..19.4  DEPARTURE……-7.2

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

1/01  51/43/47/+18/0.08/0.0/000/00        21 SSE AERO 21 SSE RMY 22
1/02  48/29/39/+11/0.29/0.0/000/00        35 NW  AERO 36 NW  RMY 35
1/03  29/18/24/-4/0.00/0.0/000/00         31 NNW AERO 30 N   RMY 30
1/04  30/12/21/-7/0.00/0.0/546/99         25 S   AERO 24 S   RMY 25
1/05  49/25/37/+9/0.21/0.0/000/00         45 S   AERO 48 S   RMY 47
1/06  40/27/34/+6/0.00/0.0/316/57         36 WNW AERO 36 WNW RMY 36
1/07  28/17/23/-4/0.78/15.7/000/00        39 WNW AERO 38 WNW RMY 39
1/08  26/11/19/-8/0.00/0.0/556/100        34 WNW AERO 32 WNW RMY 34
1/09  41/19/30/+3/0.01/T/017/03           50 SW  AERO 51 SW  RMY 53
1/10  36/17/27/0/T/T/469/84               44 WNW AERO 43 WNW RMY 46
1/11  17/4/11/-16/T/0.1/560/100           36 NW  AERO 37 NW  RMY 35
1/12  40/5/23/-4/42/0.00/0.0/533/95       43 SSW AERO 44 SSW RMY 44
1/13  45/28/37/+11/0.00/0.0/332/59        22 SW  AERO 22 SW  RMY 22
1/14  38/12/25/-1/0.00/0.0/470/83         44 NW  AERO 41 N   RMY 43
1/15  13/1/7/-19/0.00/0.0/488/86          40 NW  AERO 39 NW  RMY 40
1/16  31/0/16/-10/0.00/0.0/…/..         29 ESE AERO 28 ESE RMY 30
1/17  46/31/39/+13/1.14/0.3/…/..        65 ESE AERO 74 ESE RMY 72
1/18  32/17/25/-1/…./…/…/..         46 WNW AERO 44 WNW RMY 45
1/19  44/16/30/+4/0.00/0.0/…/..         50 SSW AERO 53 SSW RMY 51
1/20  38/16/27/+1/0.17/0.6/…/..         34 N   AERO 35 N   RMY 34

1/21  The low since midnight is 6F, the daily normal low is 17F

DAILY RECORDS FOR JANUARY 2022

1/1/22: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 43F
SURPASSES PREVIOUS RECORD OF 42F SET IN 1966

1/17/22: DAILY RECORD PEAK GUST OF 65 MPH ESE,
SURPASSES THE PREVIOUS RECORD OF 62 MPH S IN 1994

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

RECORDS FOR JANUARY 21
HIGH 65F IN 1906
LOW -4F IN 1888
PRECIP 2.49 INS. IN 1979
SNOWFALL 9.0 INS. IN 2014
PEAK GUST 78e MPH SE IN 1979

RECORDS FOR JANUARY 22
HIGH 59F IN 1916
LOW -8F IN 1888,1976
PRECIP 1.24 INS. IN 1891,1987
SNOWFALL 10.0 INS. IN 2005
PEAK GUST 67 MPH W IN 1976

TODAY’S REPORT PREPARED BY: Benjamin Turner