Tuesday, January 17, 2023

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

TUESDAY, JANUARY 17, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0710E
SUNSET:  1639E

PARTLY CLOUDY WITH A WESTERLY BREEZE FOLLOWING
YESTERDAY’S SNOWFALL….

Today we observed partly cloudy skies with excellent
visibility in the afternoon hours. Today’s weather
was on the milder side considering snow and below
freezing temperatures were the name of the game
yesterday. The event total for snow was 3.8 inches
with 2.7 inches of it falling yesterday after 7 EST.
The liquid total was 0.38 for the whole event.

The latest rain and snow dial us back on the precipitation
deficit, bringing us to 2.60 inches for rain on the year
and 7.9 inches of snow on the season. The annual rain
departure is 0.19 inches on the year. The snow departure
is -16.3 inches for the season.

Visibility today started around 60 miles, but rose to an
excellent 85 miles by the 1 P.M. observation.

The high so far today is 47F, which is 13 degrees above
the normal maximum of 34F. The low since midnight is 25F,
which is 7 degrees above the normal minimum of 18F.

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Today’s Observations:

7 A.M.
Weather: Clear, few altocumulus NE-E and cirrus
Temperature: 27F; Dew Point: 25F; Relative Humidity: 93%
Wind: W @ 11G15 kts
Sea-level pressure: 1004.8 mb; 29.67 in. Hg: rising unsteadily
Visibility: 60 miles
6-hr Max temp: 28F
6-hr Min temp: 25F
24-hr Precip:  0.18 ins.
24-hr Snowfall: 2.7 ins.
Snow Depth: 4 in
BHO SA 1155 CLR 60 048/27/25/2711G15/967/ FEW AC NE-E FEW CI NE-E-S
NEW SNW PST 24 HRS 2.7 INS/ 8/052 4/004 52004 70018 10028 20025
10 A.M.
Weather: Clear, few altocumulus NE-E and cirrus
Temperature: 36F; Dew Point: 26F; Relative Humidity: 67%
Wind: WNW @ 10 kts
Sea-level pressure: 1004.9 mb; 29.67 in. Hg: rising then falling
Visibility: 70 miles
3-hr Precip:  0.00 ins
3-hr Snowfall: 0.0 ins
BHO SA 1455 CLR 70 049/36/26/3010/967/ FEW AC NE-E FEW CI ALQDS/
8/052 50001

1 P.M.
Weather: Broken cirrus
Temperature: 46F; Dew Point: 32F; Relative Humidity: 58%
Wind: W @ 9G14 kts
Sea-level pressure: 1003.3 mb; 29.62 in. Hg: falling, then more rapidly
Visibility: 85 miles
6-hr Max temp: 47F
6-hr Min temp: 27F
6-hr Precip:  0.00 ins
6-hr Snowfall: 0.0 ins
Snow Depth: 2 ins.
BHO SA 1755 250 BKN 85 033/46/32/2709G14/962/ 8/002 58016 10047 20027

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SUMMARY FOR MONDAY, JANUARY 16, 2023

TEMPERATURE (DEGREES F)
MAX…….30   NORMAL…..34
MIN…….26   NORMAL…..18
MEAN……28   NORMAL…..26

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+2
TOTAL DEPARTURE FOR THE MONTH……………….+137 [+8.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………37  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH…………..468  DEPARTURE……-138
TOTAL HEATING UNITS FOR THE SEASON…………2378  DEPARTURE……-438
TOTAL HEATING UNITS LAST SEASON TO DATE…….2506  DEPARTURE……-128

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….36 NNE @  1:35 A.M.
VECTOR #2 (Instantaneous)..39     @  1:34 A.M.
DAVIS #2 ………………31 NE  @  1:34 A.M.
RMY #2 (Instantaneous)…..37 NNE @  1:34 A.M.
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………………22 NNE @  1:38 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24     @  1:36 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 NNE @  1:36 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 NNE @  1:36 A.M.
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…….13.0 NNW [312 total miles] VECTOR #2……………..MISSING
DAVIS #2………………12.6 N
RMY #2………………..12.5 NNW
RMY #1……….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……..0.18 DEPARTURE…..+0.03
TOTAL PRECIPITATION FOR THE MONTH…………..2.60 DEPARTURE…..+0.19
TOTAL PRECIPITATION FOR THE YEAR……………2.60 DEPARTURE…..+0.19

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..2.7 DEPARTURE……+1.9
TOTAL SNOWFALL FOR THE MONTH………………..5.2 DEPARTURE……-3.9
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….7.9 DEPARTURE…..-16.3

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PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
VEC1: Vector #1 1-second gust
RMY:  R.M. Young wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M:    Missing data

1/1   53/38/46/+17/0.04/0.0/412/75        39 WNW  VEC1 N/A    RMY 60
1/2   49/33/41/+13/0.00/0.0/044/08        39 WNW  VEC1 N/A    RMY 39
1/3   48/37/43/+15/0.50/0.0/000/00        23 S    VEC1 N/A    RMY 24
1/4   43/37/40/+12/0.31/0.0/000/00        23 NE   VEC1 N/A    RMY 23
1/5   43/33/38/+10/0.23/0.0/000/00        34 ENE  VEC1 N/A    RMY 37
1/6   35/31/33/+5/0.18/1.0/000/00         19 NNE  VEC1 N/A    RMY 19
1/7   40/30/35/+8/0.00/0.0/105/19         22 NW   VEC1 N/A    RMY 23
1/8   36/20/28/+1/0.00/0.0/517/93         26 NNW  VEC1 N/A    RMY 28
1/9   42/26/34/+7/T/0.1/267/48            27 NW   VEC1 N/A    RMY 27
1/10  41/25/33/6/0.00/0.0/318/57          28 NW   VEC1 N/A    RMY 28
1/11  33/18/26/-1/T/0.1/358/64            19 N    VEC1 N/A    RMY 18
1/12  48/28/38/+11/0.29/0.1/000/00        45 S    VEC1 N/A    RMY 46
1/13  55/36/46/+20/0.62/0.0/000/00        54 SSW  VEC1 N/A    RMY 56
1/14  36/29/33/+7/0.11/T/000/00           30 NNE  VEC1 N/A    RMY M
1/15  33/26/30/+4/0.10/1.2/000/00         45 NNE  VEC1 N/A    RMY 45
1/16  30/26/28/+2/0.22/2.7/000/00         36 NNE  VEC1 N/A    RMY 37

1/17 The low since midnight is 25F, the daily normal low is 18F

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

RECORDS FOR JANUARY 17
HIGH 55F IN 1973,1995
LOW -8F IN 1907,1982
PRECIP 1.43 INS. IN 1956
SNOWFALL 13.4 INS. IN 1956
PEAK GUST 65 MPH ESE IN 2022

RECORDS FOR JANUARY 18
HIGH 62F IN 1973, 1990
LOW -10F IN 1982
PRECIP 1.68 INS. IN 1915
SNOWFALL 13.0 INS. IN 1948
PEAK GUST 85 MPH SSE IN 2006

TODAY’S REPORT PREPARED BY: Benjamin Turner