Tuesday, July 4, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, JULY 4, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0413E
SUNSET: 1924E
MORNING FOG, OVERCAST CONDITIONS, AND LIGHT RAIN AT BLUE HILL TODAY…
Today has been overcast with light rain throughout the day. There
was an overnight thunderstorm and some rain that amounted to 0.65″
of precipitation. Due to the lack of sunshine temperatures have
remained under average with the maximum temperature reaching 71
degrees so far. The dew point has remained in the upper 60’s
throughout the day with relative humidity at or near 100% for most
in the morning and afternoon.
The wind has been relatively low for most of the day with an
average of only about 6 mph mostly from the East. The peak gust
for the day so far occurred shortly after midnight at 16 mph.
Visibility was under 2 miles for most of the day with a noticeable
clearing of about 30 miles during the last observation. Fog was
present for most of the day.
The maximum temperature so far today is 71F, this is 10 degrees
below 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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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: ENE @ 4 kts, wind light and variable
Sea-level pressure: 1013.9 mb; 29.94 in. Hg: rising, then more rapidly
Visibility: 2 miles, fog
6-hr Max temp: 69F
6-hr Min temp: 66F
24-hr Precip: 0.65 inches
BHO SA 1155 X W2 2F 139/69/69/0604/994/ WND L/V/ 8//// 53013/ 6038/ 70065 10069 20066
10 A.M.
Weather: Sky obscured, vertical visibility 200ft, light rain showers
Temperature: 69F; Dew Point: 69F; Relative Humidity: 100%
Wind: ENE @ 2 kts, wind light
Sea-level pressure: 1014.3 mb; 29.95 in. Hg: rising, then more slowly
Visibility: 1/8 mile, fog
3-hr Precip: 0.07 inches
BHO SA 1455 X W2 1/8RW-F 143/69/69/0602/995/ RW-E01B15E23B50 WND LGT/ 8//// 51004/ 6007/
1 P.M.
Weather: Overcast nimbostratus, few stratacumulus all quadrants, few lower stratusfractus all quadrants, virga S-SW
Temperature: 68F; Dew Point: 67F; Relative Humidity: 96%
Wind: NE @ 9 kts
Sea-level pressure: 1013.6 mb; 29.93 in. Hg: falling, then rising
Visibility: 30 miles, 7 miles S-SW
6-hr Max temp: 71F
6-hr Min temp: 68F
6-hr Precip: 0.08 inches
BHO SA 1755 E20 OVC 30 136/68/67/0509/993/ FEW SC ALQDS FEW LWR STFRA ALQDS VIRGA S-SW VSBY 7 S-SW 8/72/ 55007 6008/ 10071 20068
————————————————————–
SUMMARY FOR MONDAY, JULY 3, 2023
TEMPERATURE (DEGREES F)
MAX…….79 NORMAL…..81
MIN…….63 NORMAL…..63
MEAN……72 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……… 0
TOTAL DEPARTURE FOR THE MONTH…………………-2 [-0.9 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…………….6 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………16 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE SEASON………….144 DEPARTURE…….-15
TOTAL COOLING UNITS LAST SEASON TO DATE……..187 DEPARTURE…….-43
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)……….E18 NNW @ 09:45 A.M.
VECTOR #1 (1-Sec)……….18 NNW @ 09:44 A.M.
VECTOR #2 (1-Sec)……….18 NNW @ 09:44 A.M.
DAVIS #1……………….17 WSW @ 07:49 A.M.
DAVIS #2 ………………17 S @ 06:19 A.M.
RMY #1 (Instantaneous)…..17 NNW @ 09:39 A.M.
RMY #2 (Instantaneous)…..18 NNW @ 09:47 A.M.
MERLIN…………………16 N
RICHARDS (C5C) (Inst)……16 @ 09:04 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………13 SE @ 09:49 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 @ 09:06 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 09:06 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 SE @ 09:49 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 SE @ 09:57 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..12 NNW @ 09:04 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 N @ 09:07 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………13 @ 09:49 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….. 7.0 NW [167 total miles]
VECTOR #1………………… 7.2
VECTOR #2………………… 7.6
DAVIS #1…………………. 7.1 ESE
DAVIS #2…………………. 7.4 E
RMY #1…………………… 7.1 ENE
RMY #2…………………… 7.6 ENE
RICHARDS (C5C)……………. 7.8
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.65 DEPARTURE…..+0.54
TOTAL PRECIPITATION FOR THE MONTH…………..1.38 DEPARTURE…..+1.04
TOTAL PRECIPITATION FOR THE YEAR…………..26.56 DEPARTURE…..-1.01
————————————————————–
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 79/63/72/-1/0.40/…/.. 18 NNW VEC1 18 NNW RMY 17 TSTM
7/4 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 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: Amanda Joly
