Monday, July 3, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, JULY 3, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0412E
SUNSET: 1925E
DECENT AMOUNT OF RAINFALL OVERNIGHT, CLOUDY AND HUMID TODAY…
Rain, heavy at times, moved through the region overnight leaving
0.73″ of water in the gauge. Even a rumble or two of thunder was
observed just after midnight. The rain tapered off very early
this morning leaving us with a lot of low clouds and fog, which
only gradually burned off through the morning, finally lifting
completely early this afternoon.
So far, not much sunshine has been seen, but temperatures are
still rising into the low to mid 70s here on the Hill. The dew-
point has been fluctuating between the mid 60s and near 70 as a
wavy warm front has been straddling the area.
The wind has been fairly steady between 5-10mph most of the day.
The direction on the other hand has been nothing close to steady,
going from the east in the wee hours, to the south and southwest
for a time during mid morning, then to the north and northwest.
The average speed for the day so far has been around 7mph.
Visibility was limited all morning due to fog. We could only see
around 1/4 mile. It has improved markedly early this afternoon
as the clouds and fog have lifted. Views of around 60 miles can
now be seen.
The maximum temperature so far today is 74F, this is 7 degrees
below the normal high of 81F. The minimum since midnight is 63F,
which is equal to the normal low of 63F.
————————————————————–
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
Temperature: 69F; Dew Point: 69F; Relative Humidity: 100%
Wind: SSW @ 7 kts
Sea-level pressure: 1009.6 mb; 29.81 in. Hg: rising, then falling
Visibility: 1/4 mile, fog
6-hr Max temp: 69F
6-hr Min temp: 63F
24-hr Precip: 0.73 inches
BHO SA 1155 X W2 1/4F 096/69/69/2007/981/ 8//// 50003 6020/
70073 10069 20063
10 A.M.
Weather: Sky obscured, vertical visibility 200ft, light drizzle
Temperature: 66F; Dew Point: 66F; Relative Humidity: 100%
Wind: NNW @ 9 kts
Sea-level pressure: 1010.9 mb; 29.85 in. Hg: rising, then more rapidly
Visibility: 1/4 mile, fog
3-hr Precip: Trace
BHO SA 1455 X W2 1/4L-F 109/66/66/3409/985/ L-B21/ 8//// 53013 6000/
1 P.M.
Weather: Overcast stratocumulus, few breaks in overcast NNW-N,
higher clouds visible NNW-N
Temperature: 72F; Dew Point: 67F; Relative Humidity: 83%
Wind: NW @ 7 kts
Sea-level pressure: 1011.8 mb; 29.88 in. Hg: rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 74F
6-hr Min temp: 66F
6-hr Precip: Trace
BHO SA 1755 E15 OVC 60 118/72/67/3207/988/ FEW BINOVC NNW-N
HIER CLDS VSBL NNW-N/ 8/5// 51009 6000/ 10074 20066
————————————————————–
SUMMARY FOR SUNDAY, JULY 2, 2023
TEMPERATURE (DEGREES F)
MAX…….74 NORMAL…..80
MIN…….63 NORMAL…..62
MEAN……69 NORMAL…..71
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………-2
TOTAL DEPARTURE FOR THE MONTH…………………-2 [-1.2 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……..-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 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….4 DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE MONTH……………10 DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE SEASON………….138 DEPARTURE…….-14
TOTAL COOLING UNITS LAST SEASON TO DATE……..177 DEPARTURE…….-39
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)……….E35 S @ 02:20 P.M.
VECTOR #1 (1-Sec)……….35 S @ 02:20 P.M.
VECTOR #2 (1-Sec)……….35 S @ 02:18 P.M.
DAVIS #1……………….34 S @ 02:16 P.M.
DAVIS #2 ………………40 S @ 02:18 P.M.
RMY #1 (Instantaneous)…..35 S @ 02:20 P.M.
RMY #2 (Instantaneous)…..37 S @ 02:18 P.M.
MERLIN…………………32 S
RICHARDS (C5C) (Inst)……34 @ 02:20 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………26 S @ 02:20 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..24 @ 02:19 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..26 @ 02:19 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………23 S @ 02:19 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………28 S @ 02:19 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..24 S @ 02:19 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..27 S @ 02:19 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………23 @ 02:19 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….. 9.4 SSW [225 total miles]
VECTOR #1………………… 9.7
VECTOR #2…………………10.4
DAVIS #1…………………. 9.1 S
DAVIS #2………………….10.3 S
RMY #1…………………… 9.4 S
RMY #2……………………10.5 S
RICHARDS (C5C)……………. 9.7
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.73 DEPARTURE…..+0.62
TOTAL PRECIPITATION FOR THE MONTH…………..0.73 DEPARTURE…..+0.50
TOTAL PRECIPITATION FOR THE YEAR…………..25.91 DEPARTURE…..-1.55
————————————————————–
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 74/63/69/-2/0.34/…/.. 35 S VEC1 35 S RMY 35
7/3 The low since midnight is 63F, 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 3
HIGH 99F IN 1911
LOW 47F IN 1914
PRECIP 1.98 IN 2021
PEAK GUST 52 MPH NW IN 1963
RECORDS FOR JULY 4
HIGH 99F IN 1911
LOW 48F IN 1914
PRECIP 2.48 IN 2014
PEAK GUST 50e MPH WNW IN 1949
TODAY’S REPORT PREPARED BY: Matt Douglas
