Sunday, July 16, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, JULY 16, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0421E
SUNSET: 1919E
RAINY DAY WITH GUSTY WIND AND A HINT OF THUNDER IN THE AFTERNOON…
This morning started considerably dry considering the amount
of rain that was falling not far to our west. On the hill, we got
rain early this morning, and then none again until the 10 o’clock
hour. Our temperature has remained relatively stable between 74
and 75 at each observation. We could feel the dew point on the hill
with it consistently staying at 74 throughout the day. Rain has
been on and off since 10 o’clock, and about 0.88″ of rain have
fallen so far today. Thunder was heard briefly at about 2 PM.
Our peak gust so far was about 43 mph at around 10 this morning.
Winds have been consistently gusting over 30 mph throughout the day.
Our high since midnight was 76F, and our low was 73F.
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Today’s Observations:
7 A.M.
Weather: Overcast stratus
Temperature: 75F; Dew Point: 74F; Relative Humidity: 96%
Wind: SSE @ 16G17 kts
Sea-level pressure: 1012.9 mb; 29.91 in. Hg: falling unsteadily
Visibility: 30 miles
6-hr Max temp: 76F
6-hr Min temp: 74F
24-hr Precip: 0.23 inches
BHO SA 1155 E13 OVC 30 129/75/74/1616G17/991/ 8/6// 57015 70023
10076 20074
10 A.M.
Weather: Overcast stratus
Temperature: 75F; Dew Point: 74F; Relative Humidity: 96%
Wind: S @ 19G23 kts
Sea-level pressure: 1011.8 mb; 29.88 in. Hg: falling unsteadily
Visibility: 30 miles
3-hr Precip: 0.12 inches
BHO SA 1455 E13 OVC 30 118/75/74/1719G23/988/ 8/6// 57011 6012/
1 P.M.
Weather: Rain, fog
Temperature: 75F; Dew Point: 74F; Relative Humidity: 100%
Wind: S @ 16G23 kts
Sea-level pressure: 1011.6mb; 29.87 in. Hg: rising then falling
Visibility: 1/8 mile
6-hr Max temp: 76F
6-hr Min temp: 73F
6-hr Precip: 0.65 inches
BHO SA 1755 X W3 1/8RW-F 116/75/74/1916G23/987/ 8//// 58002 6065/
10076 20073
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SUMMARY FOR SATURDAY, JULY 15, 2023
TEMPERATURE (DEGREES F)
MAX…….86 NORMAL…..82
MIN…….70 NORMAL…..64
MEAN……78 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+5
TOTAL DEPARTURE FOR THE MONTH…………………+34 [+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…………..144 DEPARTURE…….+31
TOTAL COOLING UNITS FOR THE SEASON………….272 DEPARTURE…….+20
TOTAL COOLING UNITS LAST SEASON TO DATE……..272 DEPARTURE……..-7
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)……….E28 SSW @ 06:44 P.M.
VECTOR #1 (1-Sec)……….28 SSW @ 06:44 P.M.
VECTOR #2 (1-Sec)……….27 SSW @ 06:43 P.M.
DAVIS #1……………….31 S @ 05:18 P.M.
DAVIS #2 ………………32 S @ 05:59 P.M.
RMY #1 (Instantaneous)…..29 SSW @ 06:15 P.M.
RMY #2 (Instantaneous)…..28 SSW @ 06:43 P.M.
MERLIN…………………28 S
RICHARDS (C5C) (Inst)……26 @ 06:44 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 SSW @ 06:45 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 @ 06:45 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 06:44 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 S @ 06:45 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 S @ 06:45 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 SSW @ 06:45 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 SSW @ 06:44 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20 @ 06:45 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………..10.6 S [254 total miles]
VECTOR #1…………………10.8
VECTOR #2…………………11.7
DAVIS #1………………….10.1
DAVIS #2………………….12.0
RMY #1……………………10.5 SSW
RMY #2……………………11.8 SSW
RICHARDS (C5C)…………….10.6
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.23 DEPARTURE…..+0.11
TOTAL PRECIPITATION FOR THE MONTH…………..2.77 DEPARTURE…..+1.09
TOTAL PRECIPITATION FOR THE YEAR…………..27.95 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/+5/0.13/…/.. 35 SSW VEC1 35 SSW RMY 38 TSTM
7/14 78/65/72/-1/0.18/…/.. 29 SSW VEC1 32 SSW RMY 32 TSTM
7/15 86/70/78/+5/0.23/…/.. 28 SSW VEC1 30 SSW RMY 29
7/15 The low since midnight is 70, 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 16
HIGH 94F IN 1968, 1980, 1983, 1999
LOW 50F IN 1903
PRECIP 0.98 INS IN 2014
WIND 48e MPH SW 1944
RECORDS FOR JULY 17
HIGH 96F IN 1999
LOW 47F IN 1892
PRECIP 1.39 INS IN 1989
WIND 46 MPH WNW IN 1971
TODAY’S REPORT PREPARED BY: Samantha Richard
