Monday, January 23, 2023

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

MONDAY, JANUARY 23, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0706E
SUNSET:  1646E

HEAVY RAIN OVERNIGHT, TRANSITIONED TO ICE THEN SNOW TODAY…

Precipitation started as a brief burst of snow yesterday
afternoon, with which a quick 0.2″ of accumulation occurred.
Thereafter it changed to rain, with periods of rain continuing
into this morning. The rain overnight was moderate to heavy
at times with 0.94″ of liquid being measured at 7am. Light
rain tapered to drizzle early this morning, and it continued
until just after noon before becoming freezing drizzle,
freezing rain, and then sleet. Snow began mixing in just
after the 1pm observation.

Of course with all the precipitation around today, this means
yet another day with no sunshine. Today marks the 5th
consecutive day of overcast skies. The sunshine percentage
for the month through yesterday is a paltry 22% of possible!
This means only 45.8 hours of sunshine has been recorded for
the month so far, ouch!

Temperatures were holding steady at 33F degrees through late
this morning, then started to slowly fall, dropping below
freezing between 11am-noon.

The wind has been mainly north-northeasterly so far today with
an average speed for the day around 15mph. Winds were gusty
this morning with a peak occurring around 4:30am of 36mph.

The high so far today is 34F, which is equal to the normal
maximum of 34F. The low since midnight is 31F, which is 14
degrees above the normal minimum of 17F.

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Today’s Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 200ft, light drizzle
Temperature: 33F; Dew Point: 33F; Relative Humidity: 100%
Wind: NNE @ 15G25 kts, peak wind NNE 33mph at 6:12 A.M.
Sea-level pressure: 1000.4 mb; 29.54 in. Hg: falling, then more slowly
Visibility: 1/8 mile, fog
6-hr Max temp: 34F
6-hr Min temp: 32F
24-hr Precip:  0.94 ins.
24-hr Snowfall: 0.2 ins.
Snow Depth: Trace
BHO SA 1155 X W2 1/8L-F 004/33/33/0215G25/954/ PK WND 0329/12/
TOTAL NEW SNW PST 24 HRS 0.2 INS/ 8//// 4/000 56033 6063/
70094 10034 20032

10 A.M.
Weather: Sky obscured, vertical visibility 300ft, light drizzle
Temperature: 33F; Dew Point: 33F; Relative Humidity: 100%
Wind: NNE @ 14G24 kts, peak wind NNE 33mph at 9:03 A.M.
Sea-level pressure: 999.4 mb; 29.51 in. Hg: rising, then falling
Visibility: 1/4 mile, fog
3-hr Precip:  0.03 ins
3-hr Snowfall: 0.0 ins.
BHO SA 1455 X W3 1/4L-F 994/33/33/0214G24/951/ PK WND 0329/03/
8//// 58010 6003/

1 P.M.
Weather: Sky obscured, vertical visibility 200ft, light freezing rain
and light sleet
Temperature: 31F; Dew Point: 31F; Relative Humidity: 100%
Wind: N @ 8G16 kts
Sea-level pressure: 996.5 mb; 29.43 in. Hg: falling, then more rapidly
Visibility: 1/4 mile, fog
6-hr Max temp: 34F
6-hr Min temp: 31F
6-hr Precip:  0.07 ins
6-hr Snowfall: Trace
Snow Depth: Trace
BHO SA 1755 X W2 1/4ZR-IP-F 965/31/31/0108G16/043/ THN GLZ ON
NON-PAVED SFCS L-E38 ZL-B38E48 ZR-IP-B48 NEW SNW PST 6 HRS TRACE/
8//// 4/000 58029 6007/ 10034 20031

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SUMMARY FOR SUNDAY, JANUARY 22, 2023

TEMPERATURE (DEGREES F)
MAX…….35   NORMAL…..34
MIN…….25   NORMAL…..17
MEAN……30   NORMAL…..26

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+4
TOTAL DEPARTURE FOR THE MONTH……………….+184 [+8.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………35  DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH…………..655  DEPARTURE……-186
TOTAL HEATING UNITS FOR THE SEASON…………2566  DEPARTURE……-485
TOTAL HEATING UNITS LAST SEASON TO DATE…….2745  DEPARTURE……-180

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….21 N   @ 11:47 P.M.
VECTOR #2 (Instantaneous)..22     @ 11:47 P.M.
DAVIS #2 ………………19 ESE @  7:17 P.M.
RMY #2 (Instantaneous)…..20 ESE @  7:17 P.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………………15 ESE @  7:06 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16     @ 11:48 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 ESE @  7:22 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 ESE @  7:13 P.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……..6.2 WNW [149 total miles] VECTOR #2………………7.0
DAVIS #2……………….6.4 S
RMY #2…………………7.1 SSW
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……..0.94 DEPARTURE…..+0.80
TOTAL PRECIPITATION FOR THE MONTH…………..4.89 DEPARTURE…..+1.64
TOTAL PRECIPITATION FOR THE YEAR……………4.89 DEPARTURE…..+1.64

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.2 DEPARTURE……-0.4
TOTAL SNOWFALL FOR THE MONTH………………..7.2 DEPARTURE……-5.5
TOTAL SNOWFALL FOR THE SEASON (2022-2023)…….9.9 DEPARTURE…..-17.9

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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  47/25/36/+10/0.02/0.0/415/73        22 WSW  VEC1 N/A    RMY 23
1/18  49/35/42/+16/0.01/0.0/314/55        37 NW   VEC1 N/A    RMY 38
1/19  38/32/35/+9/0.75/T/000/00           31 NNE  VEC1 N/A    RMY 32
1/20  35/29/32/+6/0.56/1.6/000/00         52 NE   VEC1 N/A    RMY 54
1/21  31/25/28/+2/0.01/0.2/000/00         21 NW   VEC1 N/A    RMY 21
1/22  35/25/30/+4/0.25/0.2/000/00         21 N    VEC1 N/A    RMY 20

1/23 The low since midnight is 31F, 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 23
HIGH 62F IN 1906
LOW -10F IN 1976
PRECIP 1.69 INS. IN 1966
SNOWFALL 14.6 INS. IN 1966
PEAK GUST 85 MPH S IN 1992

RECORDS FOR JANUARY 24
HIGH 60F IN 1967
LOW -12F IN 1907
PRECIP 2.40 INS. IN 1935
SNOWFALL 11.3 INS. IN 1935
PEAK GUST 82 MPH S IN 1996

TODAY’S REPORT PREPARED BY: Matt Douglas