Sunday, March 17, 2024

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

SUNDAY, MARCH 17, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0552E
SUNSET:  1753E

A BIT OF RAIN AT THE START OF THE DAY WITH PARTLY CLOUDY CONDITIONS
AND IMPROVED VISIBILITY IN THE AFTERNOON…

Today we observed overcast skies with 0.04 inches of rainfall this
morning, with 10 miles of visibility due to fog. This afternoon, we
improved to 60 miles of visibility with fair weather cumulus. Wind was a
factor today, with a peak gust of 35 mph from the southwest and an average
speed around 15 mph.

The maximum temperature so far today is 57F degrees, which is
13 degrees above the normal high of 44F. The minimum temperature since
midnight is 40F degrees, which is 13 degrees above the normal low
of 27F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast altostratus with a few stratus fractus
Temperature: 42F; Dew Point: 42F; Relative Humidity: 100%
Wind: S @ 15G25 kts, peak of 34 mph S at 6:43 A.M.
Sea-level pressure: 1002.7 mb; 29.61 in. Hg: falling then rising
Visibility: 10 miles, thin fog
6-hr Max temp: 42F
6-hr Min temp: 41F
24-hr Precip:  0.01 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 90 OVC 10 027/42/42/1815G25/961/ FEW STFRA ALQDS THN F ALQDS
PK WND 1829/43/ 8/62/ 55011 70001 10042 20041

10 A.M.
Weather: Overcast altostratus with a few stratus fractus,
Temperature: 44F; Dew Point: 43F; Relative Humidity: 100%
Wind: S @ 11G19 kts
Sea-level pressure: 1000.4 mb; 29.54 in. Hg: falling unsteadily
Visibility: 20 miles, thin fog
3-hr Precip: 0.03 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 90 OVC 20 004/44/43/1811G19/954/ FEW STFRA ALQDS THN
F ALQDS/ 8/62/ 56023 6003/

1 P.M.
Weather: Scattered cumulus
Temperature: 55F; Dew Point: 36F; Relative Humidity: 48%
Wind: WNW @ 16G26 kts
Sea-level pressure: 999.2 mb; 29.51 in. Hg: falling then more
rapidly
Visibility: 60 miles
6-hr Max temp: 57F
6-hr Min temp: 42F
6-hr Precip:  0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 50 SCT 60 992/55/36/2716G26/951/ 8/200 58012 10057 20042

————————————————————–

SUMMARY FOR SATURDAY, MARCH 16, 2024

TEMPERATURE (DEGREES F)
MAX…….58   NORMAL…..44
MIN…….36   NORMAL…..27
MEAN……47   NORMAL…..35

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………..+12
TOTAL DEPARTURE FOR THE MONTH………………….+134 [+8.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………18  DEPARTURE…….-12
TOTAL HEATING UNITS FOR THE MONTH…………..374  DEPARTURE……-135
TOTAL HEATING UNITS FOR THE SEASON…………4262  DEPARTURE……-679
TOTAL HEATING UNITS LAST SEASON TO DATE…….4189  DEPARTURE…….+73

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)……….E29 S    @  11:33 P.M.
VECTOR #1 (1-Sec)……….26 S    @  11:33 P.M.
VECTOR #2 (1-Sec)……….24 S    @  11:33 P.M.
DAVIS #1……………….27 S    @  11:33 P.M.
DAVIS #2 ………………32 S    @  11:33 P.M.
RMY #1 (Instantaneous)…..26 S    @  11:33 P.M.
RMY #2 (Instantaneous)…..26 S    @  11:33 P.M.
MERLIN…………………31 S
RICHARDS (C5C) (Inst)……25      @  11:32 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 S    @  11:33 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20      @  11:32 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19      @  11:48 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 S    @   6:19 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 S    @  11:33 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 S    @  11:33 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 S    @  11:48 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19      @  11:33 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….8.2 WSW [197 total miles] VECTOR #1……………..8.7
VECTOR #2……………..8.9
DAVIS #1………………8.4 SSW
DAVIS #2………………8.7 WSW
RMY #1………………..8.4 WSW
RMY #2………………..8.8 WSW
RICHARDS (C5C)…………8.9

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..4.35 DEPARTURE…..+1.59
TOTAL PRECIPITATION FOR THE YEAR (2024)…….14.91 DEPARTURE…..+3.64

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……-0.5
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE……-9.3
TOTAL SNOWFALL FOR THE SEASON (2023-2024)……26.1 DEPARTURE…..-35.1

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR MARCH 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
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

3/1   41/18/30/-1/0.00/0.0/649/96         30 NW  VEC1 30 WNW RMY 33
3/2   50/32/41/+9/1.16/0.0/000/00         44 SSE VEC1 46 SE  RMY 42
3/3   55/42/49/+17/0.24/0.0/130/19        32 SSE VEC1 33 SSE RMY 32
3/4   49/36/43/+11/0.01/0.0/116/17        24 ENE VEC1 22 ENE RMY 23
3/5   42/36/39/+7/0.14/0.0/000/00         21 E   VEC1 21 E   RMY 21
3/6   51/39/45/+12/0.44/0.0/000/00        28 NE  VEC1 28 NE  RMY 29
3/7   42/37/40/+7/1.06/0.0/000/00         44 NNE VEC1 44 NNE RMY 42
3/8   45/32/39/+6/0.00/0.0/682/98         35 NNE VEC1 36 NNE RMY 38
3/9   40/32/36/+3/0.21/0.0/000/00         32 E   VEC1 32 E   RMY 31
3/10  51/36/44/+10/1.07/0.0/245/35        45 WNW VEC1 46 SE  RMY 45
3/11  43/30/37/+3/T/T/515/73              53 NW  VEC1 54 NW  RMY 58
3/12  54/33/44/+10/0.00/0.0/680/96        43 NW  VEC1 41 NW  RMY 45
3/13  54/33/44/+10/0.00/0.0/667/94        26 SSE VEC1 25 NNW RMY 25
3/14  58/36/47/+12/0.00/0.0/…/..        23 ENE VEC1 22 NE  RMY 21
3/15  44/37/41/+6/0.02/0.0/…/..         24 N   VEC1 23 NNW RMY 25
3/16  58/36/47/+12/…../…/..           29 S   VEC1 26 S   RMY 26

3/17 The low since midnight is 40F, the daily normal low is 27F.

————————————————————–

MARCH DAILY RECORDS TO DATE

NONE…

————————————————————–

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

RECORDS FOR MARCH 17
HIGH 69 IN 2003
LOW 6 IN 1885
PRECIP 1.97 INS. IN 1968
SNOWFALL 6.5 INS. IN 1956
PEAK GUST 70 MPH SSW IN 1973

RECORDS FOR MARCH 18
HIGH 73 IN 2022
LOW 0 IN 1885
PRECIP 5.61 INS. IN 1968 [RECORD FOR MONTH] SNOWFALL 9.3 INS. IN 1985
PEAK GUST 71e MPH WNW IN 1941

TODAY’S REPORT PREPARED BY: Benjamin Turner