Sunday, July 28, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, JULY 28, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0433E
SUNSET: 1907E
SEASONABLE WITH LIMITED VISIBILITY AND A LIGHT SEA BREEZE IN THE
AFTERNOON….
We observed a lower visibility today due to smoke from the Canadian wildfires,
only observing 20 miles of visibility at most. Skies were mostly cloudy by the
1 P.M. observation, with a light breeze off the ocean to bring the temperature
down slightly. Weather conditions were comfortable outside of the poorer air
quality, with humidity decreasing as the day went on.
Temperatures today are considered seasonable so far!
The maximum temperature so far today is 82F, the same as the
normal high. The minimum temperature since midnight
is 64F, which is the same as the normal low.
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Today’s Observations:
7 A.M.
Weather: Clear, few cumulus and cirrus
Temperature: 71F; Dew Point: 65F; Relative Humidity:82%
Wind: E @ 4 kts, light and variable
Sea-level pressure: 1022.1 mb; 30.18 in. Hg: rising, then more slowly
Visibility: 10 miles, thin smoke layer aloft, hazy
6-hr Max temp: 71F
6-hr Min temp: 64F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 10 221/71/65/0904/018/ FEW CU ALQDS FEW CI ALQDS
K LYR ALF HAZY WND L/V/ 8/101 51010 10071 20064
10 A.M.
Weather: Scattered altocumulus, few cumulus
Temperature: 80F; Dew Point: 60F; Relative Humidity: 51%
Wind: E @ 10 kts
Sea-level pressure: 1021.6 mb; 30.17 in. Hg: falling, then more rapidly
Visibility: 20 miles, thin smoke layer aloft, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 160 SCT 20 216/80/60/0910/017/ FEW CU ALQDS K LYR ALF HAZY/
8/230 58005
1 P.M.
Weather: Scattered cumulus, scattered altocumulus, broken cirrocumulus
Temperature: 80F; Dew Point: 59F; Relative Humidity: 49%
Wind: ENE @ 8 kts, wind light
Sea-level pressure: 1020.5 mb; 30.14 in. Hg: falling, then more rapidly
Visibility: 10 miles, thin smoke layer aloft, hazy
6-hr Max temp: 82F
6-hr Min temp: 71F
6-hr Precip: 0.00 inches
BHO SA 1755 50 SCT 160 SCT 250 BKN 10 205/80/59/0608/014/ K LYR ALF HAZY/
8/259 58009 10082 20071
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SUMMARY FOR SATURDAY, JULY 27, 2024
TEMPERATURE (DEGREES F)
MAX…….84 NORMAL…..82
MIN…….63 NORMAL…..64
MEAN……74 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+1
TOTAL DEPARTURE FOR THE MONTH…………………….+80 [+2.7 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……..-6
TOTAL HEATING UNITS FOR THE SEASON……………0 DEPARTURE……..-6
TOTAL HEATING UNITS LAST SEASON TO DATE……….0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY…………….9 DEPARTURE……..+1
TOTAL COOLING UNITS FOR THE MONTH…………..286 DEPARTURE…….+71
TOTAL COOLING UNITS FOR THE SEASON………….464 DEPARTURE……+110
TOTAL COOLING UNITS LAST SEASON TO DATE……..393 DEPARTURE…….+71
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)……….E17 SE @ 4:27 P.M.
VECTOR #1 (1-Sec)……….17 SE @ 5:56 P.M.
VECTOR #2 (1-Sec)……….17 SE @ 4:32 P.M.
DAVIS #1……………….17 S @ 8:13 P.M.
DAVIS #2 ………………19 S @ 8:13 P.M.
RMY #1 (Instantaneous)…..16 SE @ 4:26 P.M.
RMY #2 (Instantaneous)…..18 SE @ 4:23 P.M.
MERLIN…………………15 SE
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………11 SE @ 4:31 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..12 @ 4:27 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..12 @ 4:28 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………12 S @ 8:15 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 S @ 8:15 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..12 SE @ 4:27 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 SE @ 4:28 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….7.0 NNW [168 total miles]
VECTOR #1……………..7.6
VECTOR #2……………..8.0
DAVIS #1………………7.3 WNW
DAVIS #2………………7.7 NNW
RMY #1………………..7.5 WNW
RMY #2………………..8.0 WNW
RICHARDS (C5C)…………OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..2.35 DEPARTURE…..-0.65
TOTAL PRECIPITATION FOR THE YEAR (2024)…….38.03 DEPARTURE…..+7.80
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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/+4/0.05/478/53 32 SW VEC1 32 SW RMY 32
7/13 80/72/76/+3/0.64/234/26 28 SW VEC1 25 SW RMY 26
7/14 88/69/79/+6/0.00/809/90 18 SW VEC1 18 SW RMY 19
7/15 92/70/81/+8/0.07/539/60 28 WSW VEC1 27 WSW RMY 28 TSTM
7/16 92/72/82/+9/T/797/89 33 SW VEC1 34 SW RMY 34
7/17 89/71/80/+7/0.37/599/67 38 W VEC1 36 W RMY 37 TSTM
7/18 85/68/77/+4/0.55/429/48 37 W VEC1 37 W RMY 38 TSTM
7/19 82/61/72/-1/0.00/864/97 24 N VEC1 24 NNW RMY 23
7/20 85/63/74/+1/T/747/84 30 WSW VEC1 31 WSW RMY 32
7/21 86/68/77/+4/T/630/71 18 WSW VEC1 18 WSW RMY 18
7/22 83/66/75/+2/T/452/51 24 SSW VEC1 23 SSW RMY 23
7/23 75/65/70/-3/0.02/027/03 17 ESE VEC1 17 SSE RMY 17
7/24 70/64/67/-6/0.09/009/01 16 ESE VEC1 16 ESE RMY 15
7/25 80/64/72/-1/0.12/…/.. 28 WNW VEC1 28 WNW RMY 29 TSTM
7/26 83/59/71/-2/0.00/…/.. 25 N VEC1 25 N RMY 26
7/27 84/63/74/+1/0.00/…/.. 17 SE VEC1 17 SE RMY 16
7/28 The low since midnight is 64F, 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 28
HIGH 97F IN 1931
LOW 49F IN 1903
PRECIP 3.32 INS IN 1911
PEAK GUST 62 MPH SW IN 2006
RECORDS FOR JULY 29
HIGH 97F IN 1949
LOW 53F IN 1888,1914
PRECIP 1.53 INS IN 1901
PEAK GUST 40e MPH E IN 1941
TODAY’S REPORT PREPARED BY: Benjamin Turner
