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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, JULY 2, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0412E
SUNSET: 1925E
OVERCAST SKIES WITH OFF AND ON SHOWERS AND INCREASING HUMIDITY…
The morning started with dense fog once again, which limited the
visibility to around 1/8 to 1/4 of a mile for a while. The fog
burned off by mid morning, but the visibility only improved to
around 8-10 miles, until what appears to be a warm front passed
through just right around the 1pm observation. Once this front
came through, the visibility improved further to around 30 miles
for a time, before more showers moved into the area.
The temperature mainly held in the 60s this morning, then pushed
into the low to mid 70s following the warm frontal passage,
despite having no sunshine. The dew point also jumped from the
mid 60s to low 70s following the front, so it has become quite
humid out there.
The wind was light all morning, but has picked up this afternoon
following the wind shift from southeast to south/south-southwest.
The average speed for the day is only around 8mph, but has jumped
to around 19mph in the last hour. As a matter of fact, a heavy
rain shower moved through just after 2pm bringing wind gusts to
35mph with it!
As mentioned above, the visibility was limited due to dense fog
early this morning, then haziness thereafter. The view was
generally under 1/2 mile early, improving to around 30 miles by
early this afternoon.
The maximum temperature so far today is 74F, this is 6 degrees
below the normal high of 80F. The minimum since midnight is 63F,
which is 1 degree above the normal low of 62F.
————————————————————–
PRELIMINARY STATS FOR JUNE 2023
TEMPERATURE, Deg. F
Avg. Max. 73.3 [-2.1]
Avg. Min. 56.2 [-1.4]
Mean 64.8 [-1.7]
24-hour corrected mean: 63.7
Max. for month: 91F on the 2nd
Min. for month: 43F on the 3rd and 4th
HEATING DEGREE DAYS
Total heating units: 99 [+033]
Total for the season: 5295 [-915]
Total for last season: 5610
COOLING DEGREE DAYS
Total cooling units: 97 [-014]
Total for the season: 128 [-011]
Total for last season: 155
PRECIPITATION, Inches
Total: 4.43 [-0.20]
Greatest in 24 hrs: 1.91 on the 17th-18th
SNOWFALL, Inches
Total: 0.0 [0.0]
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 8.5 mph
Avg. corrected wind speed: 9.2 mph
Prevailing wind direction: South-southwest [16%]
Peak gust and direction: 38 S on the 14th, SSW on the 27th
SUNSHINE:
Campbell-Stokes card minutes: 11718 of a possible 26376, or 44%
Astronomical total minutes: 12192 of a possible 27409, or 44%
————————————————————–
Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 200ft, light rain shower
Temperature: 65F; Dew Point: 65F; Relative Humidity: 99%
Wind: SSE @ 5 kts, wind light
Sea-level pressure: 1016.3 mb; 30.01 in. Hg: rising, then more slowly
Visibility: 1/4 mile, fog
6-hr Max temp: 65F
6-hr Min temp: 63F
24-hr Precip: Trace
BHO SA 1155 X W2 1/4RW-F 163/65/65/1605/001/ RW-B10E30B42
PCPN VRY LGT WND LGT/ 8//// 51006 6000/ 70000 10065 20063
10 A.M.
Weather: Broken stratocumulus, overcast altocumulus/altostratus,
smoke layer all quadrants
Temperature: 69F; Dew Point: 65F; Relative Humidity: 86%
Wind: SSE @ 6 kts, wind light
Sea-level pressure: 1015.0 mb; 29.97 in. Hg: falling, then more slowly
Visibility: 9 miles, hazy
3-hr Precip: Trace
BHO SA 1455 E65 BKN 90 OVC 9 150/69/65/1506/997/ RW-E14 K LYR ALQDS
HAZY WND LGT/ 8/57/ 56013 6000/
1 P.M.
Weather: Broken stratus fractus, broken stratocumulus, overcast
altocumulus/altostratus, fog bank distant N-NE, virga WNW-NNW
Temperature: 72F; Dew Point: 71F; Relative Humidity: 95%
Wind: SE @ 7 kts
Sea-level pressure: 1013.2 mb; 29.92 in. Hg: falling, then more rapidly
Visibility: 30 miles, 10 miles WNW-N-NE
6-hr Max temp: 73F
6-hr Min temp: 65F
6-hr Precip: 0.05 inches
BHO SA 1755 E15 BKN 25 BKN 95 OVC 30 132/72/71/1407/992/
FBNK DSNT N-NE VIRGA WNW-NNW RW-E14 VSBY 10 WNW-N-NE/ 8/77/
58018 6005/ 10073 20065
————————————————————–
SUMMARY FOR SATURDAY, JULY 1, 2023
TEMPERATURE (DEGREES F)
MAX…….80 NORMAL…..80
MIN…….61 NORMAL…..62
MEAN……71 NORMAL…..71
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….0
TOTAL DEPARTURE FOR THE MONTH………………….0 [ 0.0 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………0
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE………0
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….6 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….6 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE SEASON………….134 DEPARTURE…….-12
TOTAL COOLING UNITS LAST SEASON TO DATE……..167 DEPARTURE…….-33
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 SSE @ 09:41 P.M.
VECTOR #1 (1-Sec)……….16 SSE @ 09:39 P.M.
VECTOR #2 (1-Sec)……….16 S @ 09:40 P.M.
DAVIS #1……………….15 S @ 06:45 P.M.
DAVIS #2 ………………19 S @ 09:40 P.M.
RMY #1 (Instantaneous)…..17 SSE @ 09:39 P.M.
RMY #2 (Instantaneous)…..17 S @ 09:40 P.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……16 @ 09:39 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………12 SSE @ 09:41 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..12 @ 09:16 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..12 @ 09:41 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………11 SSE @ 09:16 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 S @ 07:02 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..11 SSE @ 09:40 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 S @ 09:41 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………12 @ 09:40 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………..5.9 S [141 total miles]
VECTOR #1…………………6.3
VECTOR #2…………………6.7
DAVIS #1………………….6.0 SE
DAVIS #2………………….6.4 SSE
RMY #1……………………6.3 SE
RMY #2……………………6.6 SE
RICHARDS (C5C)…………….6.8
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH………….TRACE DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE YEAR…………..25.18 DEPARTURE…..-2.17
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR JUNE 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
6/1 88/56/72/+10/0.00/859/95 21 WSW VEC1 21 WSW RMY 21
6/2 91/53/72/+10/0.53/634/70 37 ENE VEC1 39 ENE RMY 37 TSTM
6/3 53/43/48/-14/0.16/000/00 36 NE VEC1 38 NE RMY 36
6/4 52/43/48/-15/0.17/009/01 30 N VEC1 32 N RMY 29
6/5 58/47/53/-10/0.08/027/03 22 N VEC1 24 N RMY 23
6/6 72/50/61/-2/T/582/64 31 NNW VEC1 31 NNW RMY 26 TSTM
6/7 65/50/58/-6/0.00/301/33 28 NW VEC1 29 NW RMY 29
6/8 64/51/58/-6/T/191/21 13 WNW VEC1 13 WNW RMY 10
6/9 64/49/57/-7/0.47/210/23 20 WNW VEC1 21 ESE RMY 20 TSTM
6/10 67/51/59/-6/0.05/365/40 26 WNW VEC1 26 WNW RMY 26 TSTM
6/11 80/55/68/+3/0.00/823/90 23 S VEC1 24 S RMY 24
6/12 79/60/70/+5/0.15/439/48 32 SSE VEC1 33 SSE RMY 31
6/13 78/59/69/+3/0.03/421/46 26 SE VEC1 27 SE RMY 24
6/14 78/57/68/+2/0.06/448/49 38 S VEC1 39 S RMY 39 TSTM
6/15 77/56/67/+1/0.00/559/61 23 WNW VEC1 22 WNW RMY 22
6/16 81/61/71/+4/T/513/56 20 W VEC1 19 SSW RMY 19
6/17 64/55/60/-7/1.86/000/00 21 NE VEC1 21 NE RMY 21
6/18 70/56/63/-4/0.05/321/35 20 WNW VEC1 20 WNW RMY 20
6/19 67/54/61/-7/0.00/284/31 20 SE VEC1 20 SE RMY 18
6/20 71/53/62/-6/T/367/40 20 ESE VEC1 20 ESE RMY 20
6/21 69/53/61/-7/0.00/826/90 20 E VEC1 20 NE RMY 20
6/22 70/58/62/-7/0.01/789/86 22 ENE VEC1 23 NE RMY 22
6/23 80/58/69/+0/0.04/303/33 18 SSW VEC1 19 SSW RMY 19
6/24 77/66/72/+3/0.12/220/24 29 SW VEC1 29 SW RMY 31
6/25 85/67/76/+6/0.00/660/72 21 SSW VEC1 21 S RMY 21 TSTM
6/26 82/66/74/+4/T/385/42 23 S VEC1 27 S RMY 25
6/27 77/65/71/+1/0.38/275/30 38 SSW VEC1 39 SSW RMY 39 TSTM
6/28 78/66/72/+2/0.25/238/26 29 SSW VEC1 29 SSW RMY 28 TSTM
6/29 81/64/73/+2/0.02/494/54 18 S VEC1 21 S RMY 22
6/30 82/63/73/+2/0.00/649/71 18 E VEC1 17 SSE RMY 17
DAILY RECORDS
06/02/2023: TIED RECORD HIGH MAXIMUM TEMPERATURE OF 91F,
ALSO SET IN 1895
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/…/.. 17 SSE VEC1 16 SSE RMY 17
7/2 The low since midnight is 63F, the daily normal low is 62F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JULY 2
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.49 INS IN 2021
PEAK GUST 45 MPH SW IN 1999
RECORDS FOR JULY 3
HIGH 99F IN 1911
LOW 47F IN 1914
PRECIP 1.98 IN 2021
PEAK GUST 52 MPH NW IN 1963
TODAY’S REPORT PREPARED BY: Matt Douglas
