Friday, July 14, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, JULY 14, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0420E
SUNSET: 1920E
OVERNIGHT STORMS GIVES WAY TO PARTIAL CLEARING OF SKIES
THIS AM…
Storms from overnight produced a little over 0.30 inches of
precipitation and once they moved out we had a little bit of sun
this morning. By the 10E observation, however, clouds moved in
fairly quickly and we remained overcast for most of the day
while showers and light rain moved in around the area. As of our
13E we have not received any additional precipitation.
Temperatures held steady in the low to mid 70s, with a little dip
in the high in the late morning due to a passing front. Dew points
remained in the upper 60s to low 70s making for a sticky and humid
feel even with a light breeze.
The wind was fairly active yesterday evening but today has remained
low with an average about 8mph. Our highest gust for the day so far
has been 24mph which was recorded at 3:30am.
Visibility started out at 50 miles and steadily declined throughout
the morning and afternoon to about 40 miles by the last observation.
Humid conditions and increasing clouds continue to limit visibility.
The maximum temperature so far today is 77F, this is 5 degrees
below the normal high of 82F. The minimum since midnight is 65F,
which is 1 degree below the normal low of 64F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus all quadrants, few altocumulus
distant W-N, few cirrus all quadrants, thin smoke layer aloft N-NNW
Temperature: 72F; Dew Point: 64F; Relative Humidity: 80%
Wind: SSE @ 5 kts, wind light
Sea-level pressure: 1014.1 mb; 29.95 in. Hg: falling unsteadily
Visibility: 50 miles
6-hr Max temp: 72F
6-hr Min temp: 65F
24-hr Precip: 0.31 inches
BHO SA 1155 CLR 50 141/72/64/1605/995/ FEW SC ALQDS FEW ACC DSNT W-N
FEW CI ALQDS THN K LYR ALF N-NNW/ 8/581 57010 6018/ 70031 10072 20065
10 A.M.
Weather: Few lower stratus fractus SE-SW-WNW, few stratocumulus all
quadrants
Temperature: 73F; Dew Point: 69F; Relative Humidity: 88%
Wind: S @ 7 kts
Sea-level pressure: 1015.1 mb; 29.98 in. Hg: rising unsteadily
Visibility: 40 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E150 BKN 200 BKN 40 151/73/69/1707/998/ FEW LWR STFRA
SE-SW-WNW FEW SC ALQDS/ 8/786/ 52010
1 P.M.
Weather: Overcast, few stratocumulus all quadrants
Temperature: 76F; Dew Point: 69F; Relative Humidity: 79%
Wind: SW @ 4 kts, wind light
Sea-level pressure: 1014.6mb; 29.96 in. Hg: decreasing then increasing
Visibility: 40 miles
6-hr Max temp: 77F
6-hr Min temp: 72F
6-hr Precip: 0.00 inches
BHO SA 1755 E150 OVC 40 146/76/71/2304/996/ FEW SC ALQDS WND LGT/ 8/55/
53005 6000/ 10077 20072
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SUMMARY FOR THURSDAY, JULY 13, 2023
TEMPERATURE (DEGREES F)
MAX…….88 NORMAL…..82
MIN…….67 NORMAL…..64
MEAN……78 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+5
TOTAL DEPARTURE FOR THE MONTH…………………+30 [+2.1 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……..-4
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-4
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY……………13 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH…………..124 DEPARTURE…….+27
TOTAL COOLING UNITS FOR THE SEASON………….252 DEPARTURE…….+16
TOTAL COOLING UNITS LAST SEASON TO DATE……..261 DEPARTURE……..-9
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 SSW @ 04:47 P.M.
VECTOR #1 (1-Sec)……….39 SSW @ 02:29 P.M.
VECTOR #2 (1-Sec)……….38 SSW @ 04:46 P.M.
DAVIS #1……………….36 S @ 03:31 P.M.
DAVIS #2 ………………40 S @ 02:04 P.M.
RMY #1 (Instantaneous)…..38 SSW @ 02:29 P.M.
RMY #2 (Instantaneous)…..38 SSW @ 04:46 P.M.
MERLIN…………………34 S
RICHARDS (C5C) (Inst)……37 @ 02:29 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………27 SSW @ 04:46 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..24 @ 03:33 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..25 @ 04:46 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………24 S @ 03:33 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………27 S @ 03:34 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..24 SSW @ 04:46 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..26 SSW @ 04:46 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………23 @ 03:33 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….11.2 SSW [269 total miles]
VECTOR #1………………..11.3
VECTOR #2………………..12.2
DAVIS #1…………………10.7 SSW
DAVIS #2…………………12.5 SSW
RMY #1…………………..11.1 SSW
RMY #2…………………..12.3 SSW
RICHARDS (C5C)……………11.1
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.31 DEPARTURE…..+0.19
TOTAL PRECIPITATION FOR THE MONTH…………..2.54 DEPARTURE…..+1.09
TOTAL PRECIPITATION FOR THE YEAR…………..27.72 DEPARTURE…..-0.96
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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 88/66/77/+5/0.00/720/79 17 S VEC1 16 SE RMY 15
7/6 92/69/81/+9/0.00/683/75 23 SSW VEC1 22 SSW RMY 23
7/7 87/70/78/+6/0.00/763/84 23 SW VEC1 22 SW RMY 23
7/8 84/70/77/+5/0.00/463/51 20 W VEC1 20 W RMY 19
7/9 81/69/75/+2/T/200/22 17 ESE VEC1 18 E RMY 17
7/10 71/66/69/-4/0.68/000/00 22 ESE VEC1 21 ESE RMY 22
7/11 85/62/74/+1/0.00/796/88 24 WNW VEC1 25 WNW RMY 25
7/12 91/70/81/+8/0.00/…/.. 21 WSW VEC1 22 SSW RMY 20
7/13 88/67/78/+5/…/…/.. 35 SSW VEC1 35 SSW RMY 38 TSTM
7/14 The low since midnight is 65, the daily normal low is 64F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JULY 14
HIGH 98F IN 1952
LOW 51F IN 1895, 1937
PRECIP 2.28 INS IN 1948
WIND 110e MPH NW IN 1942 [THUNDERSTORM GUST; RECORD FOR MONTH]
RECORDS FOR JULY 15
HIGH 94F IN 1995
LOW 50F IN 1929, 1930
PRECIP 1.64 INS IN 1896
WIND 71 MPH WNW IN 2002
TODAY’S REPORT PREPARED BY: Amanda Joly
