Monday, February 19, 2024

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

MONDAY, FEBRUARY 19, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0636E
SUNSET:  1721E

MOSTLY SUNNY AND BREEZY FOR PRESIDENTS’ DAY….

Though we began with some stratocumulus clouds in place this morning,
these quickly dissipated and moved offshore to provide mostly clear
skies. It is a great day to get outside and enjoy the sunshine!

Temperatures began in the mid 20s and quickly rose into the mid 30s
by early afternoon. The dew point has remained in the mid to upper
teens throughout the day.

There has been a steady and noticeable breeze, with wind speeds averaging
around 12mph to this point. Our peak gust thus far is around 28mph,
occurring just after 9am.

Visibility has been great all day today, ranging from 60-80 miles, allowing
us to see all the way to Mount Monadnock!

The maximum temperature so far today is 36F degrees, which is 2
degrees below the normal high of 38F. The minimum temperature
since midnight is 26F degrees, which is 6 degrees above the normal
low of 20F.

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Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, thin scattered cirrus
Temperature: 26F; Dew Point: 15F; Relative Humidity: 63%
Wind: WSW @ 9 kts
Sea-level pressure: 1015.2 mb; 29.98 in. Hg: rising, then more rapidly
Visibility: 60 miles
6-hr Max temp: 28F
6-hr Min temp: 26F
24-hr Precip: 0.00 ins
24-hr Snowfall: 0.0 ins
Snow Depth: 3 inches
BHO SA 1155 45 SCT 250 -SCT 60 152/26/15/2509/998/ 8/501 4/003 53033
10028 20026

10 A.M.
Weather: Clear, few stratocumulus all quadrants
Temperature: 33F; Dew Point: 17F; Relative Humidity: 51%
Wind: W @ 11G18 kts
Sea-level pressure: 1017.8 mb; 30.06 in. Hg: rising unsteadily
Visibility: 70 miles
3-hr Precip:  0.00 ins
3-hr Snowfall: 0.0 ins
BHO SA 1455 CLR 70 178/33/17/2811G18/006/ FEW SC ALQDS/ 8/500 52026

1 P.M.
Weather: Clear, few stratocumulus distant E-SE
Temperature: 35F; Dew Point: 16F; Relative Humidity: 45%
Wind: NW @ 9G18 kts
Sea-level pressure: 1018.8 mb; 30.09 in. Hg: rising, then steady
Visibility: 80 miles
6-hr Max temp: 36F
6-hr Min temp: 26F
6-hr Precip:  0.00 ins
6-hr Snowfall: 0.0 ins
Snow Depth: 3 inches
BHO SA 1755 CLR 80 188/35/16/3109G18/009/ FEW SC DSNT E-SE/ 8/500 4/003
51010 10036 20026

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SUMMARY FOR SUNDAY, FEBRUARY 18, 2024

TEMPERATURE (DEGREES F)
MAX…….35   NORMAL…..38
MIN…….17   NORMAL…..20
MEAN……26   NORMAL…..29

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………-3
TOTAL DEPARTURE FOR THE MONTH………………….+104 [+5.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………39  DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH…………..575  DEPARTURE……-104
TOTAL HEATING UNITS FOR THE SEASON…………3541  DEPARTURE……-541
TOTAL HEATING UNITS LAST SEASON TO DATE…….3381  DEPARTURE……+160

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated

F420C (Official)……….E39 SW   @  10:12 A.M.
VECTOR #1 (1-Sec)……….40 SW   @  10:05 A.M.
VECTOR #2 (1-Sec)……….39 SSW  @  10:05 A.M.
DAVIS #1……………….40 SW   @  10:05 A.M.
DAVIS #2 ………………38 SW   @  10:05 A.M.
RMY #1 (Instantaneous)…..41 SW   @  10:11 A.M.
RMY #2 (Instantaneous)…..41 SSW  @  10:05 A.M.
MERLIN…………………37 SW
RICHARDS (C5C) (Inst)……42      @  10:11 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………29 SW   @  10:12 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..28      @  10:12 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..29      @  10:12 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………28 SW   @  10:12 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………30 WSW  @  10:12 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..28 SW   @  10:12 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 SW   @  10:12 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………26      @  10:12 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…..13.7 SW [329 total miles] VECTOR #1……………13.6
VECTOR #2……………14.3
DAVIS #1…………….13.8 WSW
DAVIS #2…………….14.2 WSW
RMY #1………………13.4 WSW
RMY #2………………14.2 WSW
RICHARDS (C5C)……….13.3

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..0.73 DEPARTURE…..-1.73
TOTAL PRECIPITATION FOR THE YEAR (2024)……..9.97 DEPARTURE…..+3.01

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.7
TOTAL SNOWFALL FOR THE MONTH………………..4.7 DEPARTURE……-7.2
TOTAL SNOWFALL FOR THE SEASON (2023-2024)……25.6 DEPARTURE…..-20.0

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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
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY:  R.M. Young #1 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   40/30/35/+9/0.00/0.0/012/02         25 SW  VEC1 24 SW  RMY 26
2/2   39/31/35/+9/0.03/T/000/00           23 N   VEC1 24 N   RMY 25
2/3   35/26/31/+5/0.00/0.0/338/56         26 N   VEC1 26 NNW RMY 28
2/4   39/20/30/+4/0.00/0.0/607/100        28 NNW VEC1 28 NNW RMY 27
2/5   39/22/31/+4/0.00/0.0/597/98         29 N   VEC1 29 N   RMY 30
2/6   35/26/31/+4/0.00/0.0/251/41         26 N   VEC1 26 N   RMY 26
2/7   39/26/33/+6/0.00/0.0/436/71         21 NE  VEC1 21 NE  RMY 24
2/8   44/29/37/+10/0.00/0.0/457/74        16 S   VEC1 16 S   RMY 16
2/9   47/30/39/+12/0.00/0.0/229/37        31 SSW VEC1 31 SSW RMY 31
2/10  58/35/47/+20/0.02/0.0/385/62        26 NW  VEC1 26 NW  RMY 30
2/11  45/34/40/+13/0.00/0.0/119/19        30 NW  VEC1 30 NW  RMY 31
2/12  47/29/38/+10/0.00/0.0/470/75        21 N   VEC1 20 N   RMY 20
2/13  35/25/30/+2/0.65/4.3/000/00         40 NNE VEC1 41 NNE RMY M
2/14  29/21/25/-3/0.00/0.0/562/89         53 NW  VEC1 53 NW  RMY 54
2/15  38/18/28/0/0.03/0.4/…/..          37 SW  VEC1 36 SW  RMY 37
2/16  37/26/32/+4/0.00/0.0/…/..         50 WNW VEC1 47 WNW RMY 51
2/17  33/21/27/-2/T/T/…/..              36 WNW VEC1 38 WNW RMY 38
2/18  35/17/26/-3/0.00/0.0/…/..         39 SW  VEC1 40 SW  RMY 41

2/19 The low since midnight is 26F, the daily normal low is 20F

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FEBRUARY DAILY RECORDS TO DATE

NONE…

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

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 72 MPH NW IN 1968

RECORDS FOR FEBRUARY 20
HIGH 68F IN 2018
LOW -4F IN 1966
PRECIP 1.90 INCHES IN 1934
SNOWFALL 15.0 INCHES IN 1921,1934
PEAK GUST 78 MPH NW IN 1972

TODAY’S REPORT PREPARED BY: Joshua Polen