Thursday, July 4, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, JULY 4, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0413E
SUNSET: 1924E
WARM AND HUMID FOR INDEPENDENCE DAY….
Happy Independence Day! Weather conditions have been pleasant
enough so far for any outdoor activities. With a southwest flow,
the dew point has been on the rise, and it is now quite sticky out
there. Still, there has been a fair amount of sunshine despite the
mid and high level clouds, and we have remained mostly dry to this
point, aside from a few brief showers that came through mid-morning.
The temperature began the day in the low 60s, and we have managed to
reach the low 80s by early afternoon, a touch above normal for early July.
The dew point began in the low 60s and has climbed to the upper 60s, creating
the sticky feel.
The winds have been steady, gusting frequently in the 15-20mph range. The
average speed is around 14mph. The peak gust took place just before 6am this
morning, with a value of 28mph out of the south-southwest.
The visibility has been dropping as the air mass moistens, falling from
a maximum of 60 miles this morning to only 30 miles by the afternoon.
The maximum temperature so far today is 83F, which is 2 degrees
above the normal high of 81F. The minimum temperature since
midnight is 62F, which is 1 degree below the normal low of 63F.
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Today’s Observations:
7 A.M.
Weather: Overcast altocumulus/altostratus, few breaks in overcast,
higher clouds visible distant NE-E-S, virga distant SW-NW-NE
Temperature: 67F; Dew Point: 63F; Relative Humidity: 88%
Wind: SSW @ 12 kts
Sea-level pressure: 1016.2 mb; 30.01 in. Hg: falling, then rising
Visibility: 60 miles
6-hr Max temp: 67F
6-hr Min temp: 62F
24-hr Precip: 0.00 inches
BHO SA 1155 E120 OVC 60 162/67/63/2112/001/ FEW BINOVC ALQDS
HIER CLDS VSBL DSNT NE-E-S VIRGA DSNT SW-NW-NE/ 8/07/ 58005
10067 20062
10 A.M.
Weather: Scattered altocumulus, thin broken cirrus
Temperature: 76F; Dew Point: 65F; Relative Humidity: 70%
Wind: SW @ 11 kts
Sea-level pressure: 1014.5 mb; 29.96 in. Hg: falling unsteadily
Visibility: 40 miles, hazy
3-hr Precip: Trace
BHO SA 1455 90 SCT E250 -BKN 40 145/76/65/2211/996/ HAZY/ 8/071
57017 6000/
1 P.M.
Weather: Scattered altocumulus, scattered cirrus, few small cumulus
Temperature: 83F; Dew Point: 69F; Relative Humidity: 64%
Wind: SW @ 11 kts
Sea-level pressure: 1013.2 mb; 29.92 in. Hg: falling unsteadily
Visibility: 30 miles, hazy
6-hr Max temp: 83F
6-hr Min temp: 67F
6-hr Precip: Trace
BHO SA 1755 120 SCT 250 SCT 30 132/83/69/2211/992/ FEW SML CU ALQDS
HAZY/ 8/151 57013 6000/ 10083 20067
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SUMMARY FOR WEDNESDAY, JULY 3, 2024
TEMPERATURE (DEGREES F)
MAX…….84 NORMAL…..81
MIN…….62 NORMAL…..63
MEAN……73 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+1
TOTAL DEPARTURE FOR THE MONTH……………………..-1 [-0.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-1
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….8 DEPARTURE……..+1
TOTAL COOLING UNITS FOR THE MONTH……………18 DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE SEASON………….196 DEPARTURE…….+37
TOTAL COOLING UNITS LAST SEASON TO DATE……..144 DEPARTURE…….+52
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated
F420C (Official)……….E25 S @ 05:40 P.M.
VECTOR #1 (1-Sec)……….25 S @ 05:58 P.M.
VECTOR #2 (1-Sec)……….26 S @ 05:41 P.M.
DAVIS #1……………….26 S @ 04:02 P.M.
DAVIS #2 ………………32 S @ 05:58 P.M.
RMY #1 (Instantaneous)…..26 S @ 05:41 P.M.
RMY #2 (Instantaneous)…..29 S @ 05:41 P.M.
MERLIN…………………25 SW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 SSW @ 04:34 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 04:18 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 04:33 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 S @ 04:18 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 S @ 04:33 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 SSW @ 04:18 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 SSW @ 04:33 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….9.8 SSW [234 total miles]
VECTOR #1…………….10.0
VECTOR #2…………….10.8
DAVIS #1………………9.8 SW
DAVIS #2……………..10.6 SW
RMY #1………………..9.8 SW
RMY #2……………….10.8 SW
RICHARDS (C5C)…………OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..0.07 DEPARTURE…..-0.27
TOTAL PRECIPITATION FOR THE YEAR (2024)…….35.75 DEPARTURE…..+8.18
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PRELIMINARY CLIMATE SUMMARY FOR JULY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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
7/1 77/63/70/-1/0.07/722/79 29 N VEC1 27 N RMY 28 TSTM
7/2 80/60/70/-1/0.00/886/97 20 N VEC1 20 N RMY 19
7/3 84/62/73/+1/0.00/…/.. 25 S VEC1 25 S RMY 26
7/4 The low since midnight is 62F, the daily normal low is 63F.
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JULY 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 JULY 4
HIGH 99F IN 1911
LOW 48F IN 1914
PRECIP 2.48 IN 2014
PEAK GUST 50e MPH WNW IN 1949
RECORDS FOR JULY 5
HIGH 98F IN 1911
LOW 48F IN 1920, 1927 & 1979
PRECIP 1.45 INS IN 1922
PEAK GUST 49e N IN 1944
TODAY’S REPORT PREPARED BY: Joshua Polen
