Wednesday, July 17, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, JULY 17, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0423E
SUNSET: 1917E
THE HEAT CONTINUES, LOWER WINDS, AND NEAR RECORD TEMPS….
Another warm day as the region deals with another day nearing the
90F mark. Lower winds have not been helpful in finding relief from
the heat, however, the dew points stayed in the 60’s today which
is an improvement from the 70’s we were dealing with earlier this
week. It’s still an uncomfortable day to be outside for long periods
of time so hopefully everyone is staying cool.
Winds have been on the light side today, mostly after the wind
shifted yesterday evening. The average speed so far is 9mph,
with a bit more steady wind this afternoon. The peak gust so far
for the day occurred this morning after 1:00am at around 25mph.
Visibility has been marginally better today with about 40 miles
for most of the day. As the temperature increased in the early
afternoon the hazy conditions returned and impacted visibility to
around 30 miles.
The maximum temperature so far today is 87F, which is 5 degrees
above the normal high of 82F. The minimum temperature since
midnight is 71F, which is 7 degrees above the normal low of 64F.
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Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus, few cirrus WSW-NW
Temperature: 75F; Dew Point: 68F; Relative Humidity: 78%
Wind: W @ 3 kts, wind light
Sea-level pressure: 1011.2 mb; 29.86 in. Hg: rising, then
more slowly
Visibility: 40 miles
6-hr Max temp: 75F
6-hr Min temp: 71F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 40 112/75/68/2603/986/ FEW AC FEW CI WSW-NW
WND LGT/ 8/034 51016 10075 20071
10 A.M.
Weather: Scattered altocumulus, thinly scattered cirrostratus,
few cumulus distant W-NW
Temperature: 83F; Dew Point: 64F; Relative Humidity: 55%
Wind: SSW @ 7 kts
Sea-level pressure: 1012.3 mb; 29.89 in. Hg: rising, then more
slowly
Visibility: 40 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 250 SCT 95 -SCT 40 123/83/64/1907/989/ FEW CU DSNT
W-NW HAZY/ 8/136 51011
1 P.M.
Weather: Broken altocumulus, broken cirrostratus
Temperature: 86F; Dew Point: 69F; Relative Humidity: 58%
Wind: SSW @ 7 kts
Sea-level pressure: 1010.6 mb; 29.84 in. Hg: falling, then
more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 87F
6-hr Min temp: 75F
6-hr Precip: 0.00 inches
BHO SA 1755 E150 BKN 250 BKN 30 106/86/69/1907/984/ HAZY/
8/036 56017 10087 20075
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SUMMARY FOR TUESDAY, JULY 16, 2024
TEMPERATURE (DEGREES F)
MAX…….92 NORMAL…..82
MIN…….72 NORMAL…..64
MEAN……82 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+9
TOTAL DEPARTURE FOR THE MONTH…………………….+74 [+4.4 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
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 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY……………17 DEPARTURE……..+9
TOTAL COOLING UNITS FOR THE MONTH…………..192 DEPARTURE…….+70
TOTAL COOLING UNITS FOR THE SEASON………….370 DEPARTURE……+109
TOTAL COOLING UNITS LAST SEASON TO DATE……..281 DEPARTURE…….+89
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated
F420C (Official)……….E33 SW @ 04:13 P.M.
VECTOR #1 (1-Sec)……….34 SW @ 04:13 P.M.
VECTOR #2 (1-Sec)……….34 SW @ 04:13 P.M.
DAVIS #1……………….32 SW @ 04:13 P.M.
DAVIS #2 ………………34 SW @ 04:13 P.M.
RMY #1 (Instantaneous)…..34 SW @ 04:13 P.M.
RMY #2 (Instantaneous)…..34 SW @ 04:13 P.M.
MERLIN…………………32 SW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………24 SW @ 04:03 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23 @ 04:03 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24 @ 04:03 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 SSW @ 04:03 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 SSW @ 04:03 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..23 SW @ 04:03 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 SSW @ 04:03 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……12.2 WSW [292 total miles]
VECTOR #1…………….12.3
VECTOR #2…………….12.8
DAVIS #1……………..12.2 SW
DAVIS #2……………..12.8 WSW
RMY #1……………….12.0 WSW
RMY #2……………….12.7 SW
RICHARDS (C5C)…………OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..1.20 DEPARTURE…..-0.59
TOTAL PRECIPITATION FOR THE YEAR (2024)…….36.88 DEPARTURE…..+7.86
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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 77/63/70/-1/0.07/722/79 29 N VEC1 27 N RMY 28 TSTM
7/2 80/60/70/-1/0.00/886/97 20 N VEC1 20 N RMY 19
7/3 84/62/73/+1/0.00/856/94 25 S VEC1 25 S RMY 26
7/4 85/62/74/+2/0.04/392/43 28 SSW VEC1 28 SSW RMY 28
7/5 84/68/76/+4/0.22/146/16 29 SSW VEC1 29 SSW RMY 29
7/6 77/71/74/+2/0.10/009/01 31 SW VEC1 33 SSW RMY 33
7/7 88/72/80/+8/0.00/345/38 15 SW VEC1 15 SW RMY 14
7/8 91/71/81/+9/0.00/780/86 17 NW VEC1 18 NW RMY 18
7/9 88/72/80/+7/T/534/59 26 SSW VEC1 27 SSW RMY 29
7/10 88/72/80/+7/0.00/552/61 38 SSW VEC1 37 SSW RMY 38
7/11 87/71/79/+6/0.01/470/52 41 SSW VEC1 40 SSW RMY 41
7/12 85/69/77/+4/0.05/…/.. 32 SW VEC1 32 SW RMY 32
7/13 80/72/76/+3/0.64/…/.. 28 SW VEC1 25 SW RMY 26
7/14 88/69/79/+6/0.00/…/.. 18 SW VEC1 18 SW RMY 19
7/15 92/70/81/+8/0.07/…/.. 28 WSW VEC1 27 WSW RMY 28 TSTM
7/16 92/72/82/+9/0.00/…/.. 33 SW VEC1 34 SW RMY 34
7/17 The low since midnight is 70F, the daily normal low is 64F.
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JULY DAILY RECORDS TO DATE
NONE.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JULY 17
HIGH 96F IN 1999
LOW 47F IN 1892
PRECIP 1.39 INS IN 1989
WIND 46 MPH WNW IN 1971
RECORDS FOR JULY 18
HIGH 96F IN 1991, 1999
LOW 54F IN 1892, 1956, 1971
PRECIP 1.65 INS IN 2000
WIND 43e MPH SW IN 1949
TODAY’S REPORT PREPARED BY: Amanda Joly
