Saturday, February 11, 2023

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

SATURDAY, FEBRUARY 11, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0646E
SUNSET:  1711E

MOSTLY CLEAR DAY WITH GUSTY WIND AND GREAT VISIBILITY….

Although not quite as warm as yesterday, which captured a daily high temperature
record of 60F beating the previous record of 54F in 1909, today has been warmer
than average with a high of 42F, which is 6 degrees warmer than the normal
high temperature for today of 36F. Visibility has been excellent with
Monadnock’s tree line fully visible, making for a 90 mile view at the
10 o’clock observation and only becoming slightly hazier by 1 o’clock.

Winds have been moderately strong today, frequently gusting over 25 knots
as a high pressure system moves into the area from the west. Besides this,
observing has been pleasant, and I hope these conditions persist!

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Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus in all directions
Temperature: 31F; Dew Point: 21F; Relative Humidity: 52%
Wind: WNW @ 11G19 kts
Sea-level pressure: 1019.1 mb; 30.10 in. Hg: rising, then more slowly
Visibility: 90 miles
6-hr Max temp: 37F
6-hr Min temp: 31F
24-hr Precip:  0.00
24-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1155 CLR 90 191/31/21/2911G19/010/ FEW SC ALQDS/ 8/500
53038 10037 20031

10 A.M.
Weather: Scattered stratocumulus
Temperature: 39F; Dew Point: 24F; Relative Humidity: n/a
Wind: ENE @ 14G25 kts
Sea-level pressure: 1022.6 mb; 30.20 in. Hg: rising, then more slowly
Visibility: 90 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 50 SCT 90 226/39/24/0614G25/020/ 8/500 51035

1 P.M.
Weather: Clear, few stratocumulus in all directions
Temperature: 32F; Dew Point: 25F; Relative Humidity: 52%
Wind: NNW @ 13G21 kts
Sea-level pressure: 1024.1 mb; 30.24 in. Hg: rising, then more slowly
Visibility: 80 miles
6-hr Max temp: 42F
6-hr Min temp: 31F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: 0 ins.
BHO SA 1755 CLR 80 241/32/25/3413G21/024/ FEW SC ALQDS/ 8/500 53015
10042 20031

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SUMMARY FOR FRIDAY, FEBRUARY 10, 2023

TEMPERATURE (DEGREES F)
MAX…….60   NORMAL…..36
MIN…….31   NORMAL…..19
MEAN……46   NORMAL…..27

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……..+19
TOTAL DEPARTURE FOR THE MONTH………………..+20 [+1.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………19  DEPARTURE…….-19
TOTAL HEATING UNITS FOR THE MONTH…………..364  DEPARTURE…….-20
TOTAL HEATING UNITS FOR THE SEASON…………3187  DEPARTURE……-600
TOTAL HEATING UNITS LAST SEASON TO DATE…….3481  DEPARTURE……-294

PEAK WIND GUST (MPH):
420C (Official)…………43 W   @ 4:30 P.M.
VECTOR #2 (1-Sec)……….50     @ 2:32 P.M.
DAVIS #1……………….N/A
DAVIS #2 ………………47 WNW @ 3:32 P.M.
RMY #2 (Instantaneous)…..51 WNW @ 2:32 P.M.
MERLIN…………………42 W
VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
RMY #1………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………38 WNW @ 2:33 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..37     @ 2:32 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………N/A
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………37 WNW @ 2:33 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..36 WNW @ 2:32 P.M.
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……18.8 NW  [451 total miles] VECTOR #2…………….19.7
DAVIS #1……………..N/A
DAVIS #2……………..N/A
RMY #2……………….18.8 W
RMY #1……….OUT OF SERVICE D/T RENOVATIONS
VECTOR #1…….OUT OF SERVICE D/T RENOVATIONS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.01 DEPARTURE…..-1.33
TOTAL PRECIPITATION FOR THE YEAR……………6.80 DEPARTURE…..+0.96

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE MONTH………………..0.1 DEPARTURE……-6.7
TOTAL SNOWFALL FOR THE SEASON (2022-2023)……15.0 DEPARTURE…..-25.5

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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/…/..        30 NW   VEC1 N/A    RMY 34
2/9   49/33/41/+14/…./0.0/…/..        31 SSE  VEC1 N/A    RMY 32
2/10  60/31/46/+19/0.00/0.0/…/..        43 W    VEC1 N/A    RMY 51

2/11 The low since midnight is 31F, the daily normal low is 19F

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 56 SET IN 1909

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

RECORDS FOR FEBRUARY 11
HIGH 60F IN 1981
LOW -10F IN 1899
PRECIP 1.07 INCHES IN 1955
SNOWFALL 9.6 INCHES IN 1933
PEAK GUST 95 MPH S IN 1981

RECORDS FOR FEBRUARY 12
HIGH 59F IN 2022
LOW -14F IN 1914
PRECIP 4.85 INCHES IN 1886 [RECORD FOR MONTH] SNOWFALL 15.0 INCHES IN 2006
PEAK GUST 70 MPH E IN 1985

TODAY’S REPORT PREPARED BY: Samantha Richard