Wednesday, July 5, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, JULY 5, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0413E
SUNSET: 1924E
EARLY MORNING FOG QUICKLY BURNED OFF, LEADING TO HAZY SUNSHINE,
VERY WARM, AND HUMID CONDITIONS….
Dense fog was observed early this morning, but it quickly burned
off prior to the 7am observation. Hazy sunshine has thus been
the theme today, which is a welcomed sight after all the clouds
and rain over the holiday weekend.
Temperatures have risen quite well with readings reaching the mid
to upper 80s by early this afternoon. With a dew point in the
upper 60s to around 70, it’s rather sticky outside today.
The wind has been light for most of the day with an average speed
of only about 5mph. The highest gust so far has only been around
14mph, occurring just after 4:30am.
Visibility has been limited today due to fog early, and then just
general haziness the remainder of the day. Views of 25-30 miles
has been the theme all day after the fog burned off.
The maximum temperature so far today is 88F, this is 7 degrees
above the normal high of 81F. The minimum since midnight is 66F,
which is 3 degrees above the normal low of 63F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratus fractus all quadrants
Temperature: 70F; Dew Point: 70F; Relative Humidity: 100%
Wind: NNW @ 5 kts, wind light
Sea-level pressure: 1015.4 mb; 29.99 in. Hg: rising, then more rapidly
Visibility: 25 miles, thin fog
6-hr Max temp: 70F
6-hr Min temp: 66F
24-hr Precip: 0.17 inches
BHO SA 1155 CLR 25 154/70/70/3305/999/ FEW STFRA ALQDS THN F ALQDS
WND LGT/ 8/700 53005 70017 10070 20066
10 A.M.
Weather: Clear, few cumulus distant ESE-SW-W
Temperature: 79F; Dew Point: 68F; Relative Humidity: 70%
Wind: NNW @ 3 kts, wind light and variable
Sea-level pressure: 1015.9 mb; 30.00 in. Hg: rising, then more slowly
Visibility: 25 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 25 159/79/68/3303/000/ FEW CU DSNT ESE-SW-W HAZY
WND L/V/ 8/200 51005
1 P.M.
Weather: Scattered cumulus, thin scattered cirrus
Temperature: 84F; Dew Point: 67F; Relative Humidity: 57%
Wind: WSW @ 2 kts, wind light and variable
Sea-level pressure: 1015.3mb; 29.98 in. Hg: steady, then falling
Visibility: 30 miles, hazy
6-hr Max temp: 85F
6-hr Min temp: 70F
6-hr Precip: 0.00 inches
BHO SA 1755 20 SCT 250 -SCT 30 153/84/67/2402/998/ HAZY WND L/V/
8/201 58006 10085 20070
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SUMMARY FOR TUESDAY, JULY 4, 2023
TEMPERATURE (DEGREES F)
MAX…….71 NORMAL…..81
MIN…….65 NORMAL…..63
MEAN……68 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………-4
TOTAL DEPARTURE FOR THE MONTH…………………-7 [-2.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
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 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….3 DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE MONTH……………19 DEPARTURE……..-8
TOTAL COOLING UNITS FOR THE SEASON………….147 DEPARTURE…….-19
TOTAL COOLING UNITS LAST SEASON TO DATE……..194 DEPARTURE…….-47
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)……….E17 NE @ 02:59 P.M.
VECTOR #1 (1-Sec)……….18 NE @ 03:01 P.M.
VECTOR #2 (1-Sec)……….19 NE @ 02:59 P.M.
DAVIS #1……………….17 ENE @ 03:01 P.M.
DAVIS #2 ………………18 ENE @ 02:59 P.M.
RMY #1 (Instantaneous)…..17 NE @ 02:59 P.M.
RMY #2 (Instantaneous)…..19 NE @ 02:59 P.M.
MERLIN…………………16 NE
RICHARDS (C5C) (Inst)……16 @ 02:58 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………12 NE @ 02:50 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..12 @ 02:48 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 02:59 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 ENE @ 02:48 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 ENE @ 03:00 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..12 ENE @ 02:48 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 S @ 12:42 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………12 @ 12:05 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….. 5.2 E [124 total miles]
VECTOR #1………………… 5.7
VECTOR #2………………… 6.0
DAVIS #1…………………. 5.4 ESE
DAVIS #2…………………. 5.6 ESE
RMY #1…………………… 5.7 E
RMY #2…………………… 6.0 E
RICHARDS (C5C)……………. 6.3
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.17 DEPARTURE…..+0.06
TOTAL PRECIPITATION FOR THE MONTH…………..1.55 DEPARTURE…..+1.10
TOTAL PRECIPITATION FOR THE YEAR…………..26.73 DEPARTURE…..-0.95
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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 80/61/71/0/0.00/567/62 17 SSE VEC1 16 SSE RMY 17
7/2 74/63/69/-2/0.34/027/03 35 S VEC1 35 S RMY 35
7/3 79/63/72/-1/0.40/265/29 18 NNW VEC1 18 NNW RMY 17 TSTM
7/4 71/65/68/-4/0.81/000/00 17 NE VEC1 18 NE RMY 17 TSTM
7/5 The low since midnight is 66, the daily normal low is 63F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
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
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
TODAY’S REPORT PREPARED BY: Matt Douglas
