Saturday, February 18, 2023

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

SATURDAY, FEBRUARY 18, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0638E
SUNSET:  1720E

MOSTLY CLEAR AND COOLER WITH EXCELLENT VISIBILITY….

Today was mostly clear with a few lower level clouds moving
offshore and a few higher level clouds moving in from the
northwest. It’s been quite an enjoyable and seasonable day
following a trace of snow that fell overnight. Wind is
northwesterly with an average speed around 10 mph and some
gusts around 20 mph.

Visibility has been excellent so far today, almost perfect
at 85 miles! Quite a contrast to the warm and overcast day
yesterday.

The high so far today is 34F, which is 4 degrees below the
normal maximum of 38F. The low since midnight is 19F, which
is a degree below the normal low of 20F.

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Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus
Temperature: 19F; Dew Point: 12F; Relative Humidity: 73%
Wind: NW @ 9G14 kts
Sea-level pressure: 1022.5 mb; 30.19 in. Hg: rising steadily
Visibility: 85 miles
6-hr Max temp: 22F
6-hr Min temp: 19F
24-hr Precip:  0.02 ins.
24-hr Snowfall: Trace
Snow Depth: Trace
BHO SA 1155 CLR 85 225/19/12/3209G14/019/ FEW SC NE-E-S NEW SNW PST 24 TRACE/
8/500 4/000 52049 70002 10022 20019

10 A.M.
Weather: Few stratocumulus NE-E-S
Temperature: 27F; Dew Point: 14F; Relative Humidity: 58%
Wind: W @ 7 kts
Sea-level pressure: 1024.8 mb; 30.26 in. Hg: rising, then more slowly
Visibility: 85 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 85 248/27/14/2707/026/ FEW SC NE-E-S/ 8/500 51023

1 P.M.
Weather: Few stratocumulus NE-E-S, few cirrostratus SW-W-N
Temperature: 34F; Dew Point: 15F; Relative Humidity: 45%
Wind: W @ 9G22 kts
Sea-level pressure: 1024.3 mb; 30.24 in. Hg: falling, then more rapidly
Visibility: 85 miles
6-hr Max temp: 34F
6-hr Min temp: 19F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 CLR 85 243/34/15/2709G22/024/ FEW SC NE-E-S FEW CS SW-W-N/ 8/505
58005 10034 20019

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SUMMARY FOR FRIDAY, FEBRUARY 17, 2023

TEMPERATURE (DEGREES F)
MAX…….56   NORMAL…..37
MIN…….23   NORMAL…..20
MEAN……40   NORMAL…..29

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..+11
TOTAL DEPARTURE FOR THE MONTH……………….+121 [+6.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………25  DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE MONTH…………..522  DEPARTURE……-121
TOTAL HEATING UNITS FOR THE SEASON…………3345  DEPARTURE……-701
TOTAL HEATING UNITS LAST SEASON TO DATE…….3709  DEPARTURE……-364

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
420C, Contacting, Merlin and Richards are all Main Tower.

420C (Official)…………44 NNW @ 11:02 P.M.
VECTOR #1 (1-Sec)……….46 NNW @ 11:02 P.M.
VECTOR #2 (1-Sec)……….47     @ 11:57 P.M.
DAVIS #1……………….44 NW  @ 11:02 P.M.
DAVIS #2 ………………42 NW  @ 11:02 P.M.
RMY #1 (Instantaneous)…..M
RMY #2 (Instantaneous)…..49 NNW @ 11:57 P.M.
MERLIN…………………43 NW
RICHARDS (C5C) (Inst)……47     @ 11:02 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………33 NNW @ 11:04 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..30     @ 11:03 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..29     @ 11:06 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………31 NW  @ 10:06 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 NW  @ 10:06 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..M
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 NNW @ 10:06 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………30     @ 10:06 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……15.6 SSW [375 total miles] VECTOR #1…………….M
VECTOR #2…………….15.8
DAVIS #1……………..14.8 WSW
DAVIS #2……………..15.8 WSW
RMY #1……………….M
RMY #2……………….15.7 WSW
RICHARDS (C5C)………..M

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.02 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.03 DEPARTURE…..-2.28
TOTAL PRECIPITATION FOR THE YEAR……………6.82 DEPARTURE…..+0.01

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE……-0.6
TOTAL SNOWFALL FOR THE MONTH………………..0.1 DEPARTURE…..-11.1
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……15.0 DEPARTURE…..-29.9

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PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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

2/1   30/18/24/-2/T/T/552/92              17 NW   VEC1 N/A    RMY 20
2/2   38/19/29/+3/0.00/0.0/518/86         25 SW   VEC1 N/A    RMY 29
2/3   28/-11/9/-17/T/T/557/92             56 WNW  VEC1 N/A    RMY 64
2/4   14/-14/0/-26/0.00/0.0/473/78        45 NW   VEC1 N/A    RMY 51
2/5   49/14/32/+5/0.00/0.0/359/59         38 SW   VEC1 N/A    RMY 43
2/6   47/30/39/+12/0.00/0.0/025/04        28 NE   VEC1 N/A    RMY 29
2/7   31/22/27/0/0.01/0.1/461/75          29 SSW  VEC1 N/A    RMY 33
2/8   46/31/39/+12/0.00/0.0/413/67        30 NW   VEC1 N/A    RMY 34
2/9   49/33/41/+14/T/0.0/149/24           31 SSE  VEC1 N/A    RMY 32
2/10  60/31/46/+19/0.00/0.0/603/97        43 W    VEC1 N/A    RMY 51
2/11  43/31/37/+10/0.00/0.0/625/100       41 WNW  VEC1 N/A    RMY 46
2/12  48/28/38/+10/0.00/0.0/339/54        22 SW   VEC1 N/A    RMY 24
2/13  42/33/38/+10/0.00/0.0/069/11        28 NE   VEC1 N/A    RMY 36
2/14  50/34/42/+14/0.00/0.0/…/..        30 NW   VEC1 33     RMY 35
2/15  56/35/46/+18/0.00/0.0/…/..        39 SSW  VEC1 44     RMY 49
2/16  61/50/56/+28/T/0.0/…/..           29 W    VEC1 31     RMY 34
2/17  56/23/40/+11/0.02/T/…/..          44 NNW  VEC1 46     RMY 46

2/18  The low since midnight is 19F, the daily normal low is 20F

DAILY RECORDS

02/03/2023: NEW RECORD MINIMUM TEMPERATURE OF -11F,
THIS BEATS THE OLD RECORD OF -7F SET IN 1955

02/04/2023: NEW RECORD MINIMUM TEMPERATURE OF -14F,
THIS BEATS THE OLD RECORD OF -4F SET IN 1886 AND 1908

02/10/2023: NEW RECORD MAXIMUM TEMPERATURE OF 60F,
THIS BEATS THE OLD RECORD OF 56F SET IN 1909

02/16/2023: NEW RECORD HIGH MINIMUM TEMPERATURE OF 50F,
THIS BEATS THE OLD RECORD OF 41F SET IN 1976. THIS ALSO
TIES THE WARMEST MINIMUM TEMPERATURE FOR FEBRUARY SET
IN 2018

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

RECORDS FOR FEBRUARY 18
HIGH 65F IN 1981
LOW -10F IN 1958
PRECIP 1.97 INCHES IN 1887, IN 1952
SNOWFALL 9.2 INCHES IN 1952
PEAK GUST 70 MPH S IN 2008

RECORDS FOR FEBRUARY 19
HIGH 66F IN 1981
LOW -5F IN 1923
PRECIP 2.73 INCHES IN 1972
SNOWFALL 8.9 INCHES IN 1964
PEAK GUST 76 MPH ENE IN 1972

TODAY’S REPORT PREPARED BY: Benjamin Turner