Saturday, July 6, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, JULY 6, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0414E
SUNSET: 1923E
ANOTHER DAY OF SHOWERS, LOW CLOUDS, AND FOG…
The tropical air mass remains in place, as we yet again began the
day with showers and fog, and low clouds still remain overhead.
From the showers this morning we received 0.10″ of rainfall.
Temperatures have been rather flat today, beginning the day at 72F and only
rising by 3F to 75F by the early afternoon. The air remains nearly saturated,
as the dew point is in the low 70s.
Winds have picked up through the afternoon, with frequent gusts
of 20-25mph. Our peak so far took place just after noon time, with a value
of approximately 31mph. The flow remains out of the southwest, with an average
speed of 15mph.
Visibility was poor again this morning, with a value of 1/16 of a mile
through at least 10am, due to dense fog. Views have improved up to
40 miles by the 1pm observation.
The maximum temperature so far today is 75F, which is 6 degrees
below the normal high of 81F. The minimum temperature since
midnight is 72F, which is 9 degrees above the normal low of 63F.
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Today’s Observations:
7 A.M.
Weather: Light drizzle and fog, sky obscured, vertical visibility 200ft
Temperature: 72F; Dew Point: 72F; Relative Humidity: 100%
Wind: SSW @ 13G19 kts
Sea-level pressure: 1012.4 mb; 29.90 in. Hg: rising unsteadily
Visibility: 1/16 mile, fog
6-hr Max temp: 72F
6-hr Min temp: 72F
24-hr Precip: 0.01 inches
BHO SA 1155 X W2 1/16L-F 124/72/72/2113G19/990/ PCPN VRY LGT/ 8////
52015 70001 10072 20072
10 A.M.
Weather: Fog, sky obscured, vertical visibility 200ft
Temperature: 72F; Dew Point: 72F; Relative Humidity: 100%
Wind: S @ 13G19 kts
Sea-level pressure: 1011.9 mb; 29.88 in. Hg: rising, then falling
Visibility: 1/16 mile, fog
3-hr Precip: 0.10 inches
BHO SA 1455 X W2 1/16F 119/72/72/1813G19/988/ 8//// 58005 6010/
1 P.M.
Weather: Overcast stratus
Temperature: 75F; Dew Point: 73F; Relative Humidity: 94%
Wind: SSW @ 16G23 kts
Sea-level pressure: 1012.0 mb; 29.88 in. Hg: steady, then rising
Visibility: 40 miles, thin fog all quadrants
6-hr Max temp: 75F
6-hr Min temp: 72F
6-hr Precip: 0.10 inches
BHO SA 1755 E6 OVC 40 120/75/73/2116G23/988/ THN F ALQDS/ 8/6// 53001
6010/ 10075 20072
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SUMMARY FOR FRIDAY, JULY 5, 2024
TEMPERATURE (DEGREES F)
MAX…….84 NORMAL…..81
MIN…….68 NORMAL…..63
MEAN……76 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+4
TOTAL DEPARTURE FOR THE MONTH……………………..+5 [+0.8 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……..-2
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-2
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY……………11 DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE MONTH……………38 DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE SEASON………….216 DEPARTURE…….+43
TOTAL COOLING UNITS LAST SEASON TO DATE……..159 DEPARTURE…….+57
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)……….E29 SSW @ 09:24 P.M.
VECTOR #1 (1-Sec)……….29 SSW @ 11:52 P.M.
VECTOR #2 (1-Sec)……….29 SSW @ 09:24 P.M.
DAVIS #1……………….29 S @ 08:01 P.M.
DAVIS #2 ………………33 S @ 08:48 P.M.
RMY #1 (Instantaneous)…..29 SSW @ 11:52 P.M.
RMY #2 (Instantaneous)…..30 SSW @ 07:36 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 SSW @ 07:37 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 @ 09:24 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 @ 07:38 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 S @ 08:03 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 S @ 08:50 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 SSW @ 09:24 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 SSW @ 07:38 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……10.3 SSW [246 total miles]
VECTOR #1…………….10.6
VECTOR #2…………….11.2
DAVIS #1……………..10.0 SSW
DAVIS #2……………..11.3 SSW
RMY #1……………….10.3 SSW
RMY #2……………….11.4 SSW
RICHARDS (C5C)…………OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.01 DEPARTURE…..-0.10
TOTAL PRECIPITATION FOR THE MONTH…………..0.33 DEPARTURE…..-0.23
TOTAL PRECIPITATION FOR THE YEAR (2024)…….36.01 DEPARTURE…..+8.22
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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 85/62/74/+2/…/…/.. 28 SSW VEC1 28 SSW RMY 28
7/5 84/68/76/+4/…/…/.. 29 SSW VEC1 29 SSW RMY 29
7/6 The low since midnight is 72F, 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 6
HIGH 99F IN 2010
LOW 47F IN 1979
PRECIP 1.43 INS IN 2005
PEAK GUST 56e MPH NNW IN 1942, 56 MPH WNW IN 1999
RECORDS FOR JULY 7
HIGH 97F IN 1908,1993
LOW 48F IN 1902
PRECIP 2.11 INS IN 1966
PEAK GUST 63 MPH NW IN 2021
TODAY’S REPORT PREPARED BY: Joshua Polen
