Wednesday, July 24, 2024

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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

WEDNESDAY, JULY 24, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0429E
SUNSET: 1912E

ONCE AGAIN OVERCAST AND COOL WITH A FEW LIGHT RAIN SHOWERS….

Today has featured plenty of cloud cover with periods of light
rain showers occurring off and on since the predawn hours. A
total of 0.09″ of rain has been measured, 0.07″ of which fell
before 7am, and the remaining 0.02″ falling in the hour prior
to the 1pm observation.

Thanks to the overcast skies, temperatures are once again being
held down, spending most of the day so far in the 60s, but did
briefly reach 70F between 12-1pm. The dew point remains on the
higher side with values in the mid 60s, so it does still feel
a bit muggy out there today.

The wind has been on the light side once again with an average
speed of around 6mph. The peak gust for the day so far is 16mph,
which occurred just after 4am this morning.

Visibility has been limited today of course with the thin fog
and rain shower activity. The view has generally been around
20-30 miles, but has briefly been as low as 1/4 mile during
the predawn hours.

The maximum temperature so far today is 70F, which is 12
degrees below the normal high of 82F. The minimum temperature
since midnight is 64F, which is equal to the normal low of 64F.

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Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, overcast cirrostratus, few breaks in
overcast distant NNE-NE, few lower stratus fractus all quadrants
Temperature: 66F; Dew Point: 65F; Relative Humidity: 97%
Wind: SE @ 6 kts, wind light
Sea-level pressure: 1022.7 mb; 30.20 in. Hg: falling, then rising
Visibility: 20 miles, thin fog
6-hr Max temp: 66F
6-hr Min temp: 64F
24-hr Precip: 0.07 inches
BHO SA 1155 E35 BKN 200 OVC 20 227/66/65/1306/020/ FEW BINOVC DSNT
NNE-NE FEW LWR STFRA ALQDS THN F ALQDS WND LGT/ 8/707 53001 6007/
70007 10066 20064

10 A.M.
Weather: Overcast stratocumulus
Temperature: 67F; Dew Point: 65F; Relative Humidity: 92%
Wind: ESE @ 4 kts, wind light
Sea-level pressure: 1023.3 mb; 30.22 in. Hg: rising, then steady
Visibility: 30 miles, thin fog
3-hr Precip: Trace
BHO SA 1455 E10 OVC 30 233/67/65/1104/022/ THN F ALQDS L-E05 WND LGT/
8/5// 51006 6000/

1 P.M.
Weather: Broken stratocumulus, overcast nimbostratus, few lower
stratus fractus all quadrants, very light rain showers
Temperature: 68F; Dew Point: 66F; Relative Humidity: 90%
Wind: ENE @ 4 kts, wind light
Sea-level pressure: 1022.6 mb; 30.20 in. Hg: rising, then falling
Visibility: 20 miles, 30 miles SE-SSW, 15 miles SW-NW, 10 miles N-NE
6-hr Max temp: 70F
6-hr Min temp: 66F
6-hr Precip: 0.02 inches
BHO SA 1755 E10 BKN 120 OVC 20RW- 226/68/66/0704/020/ FEW LWR STFRA
ALQDS THN F ALQDS PCPN VRY LGT VSBY 30 SE-SSW 15 SW-NW 10 N-NE/
8/72/ 58007 6002/ 10070 20066

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SUMMARY FOR TUESDAY, JULY 23, 2024

TEMPERATURE (DEGREES F)
MAX…….75 NORMAL…..82
MIN…….65 NORMAL…..64
MEAN……70 NORMAL…..73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..-3
TOTAL DEPARTURE FOR THE MONTH…………………….+88 [+3.6 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…………….5 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH…………..262 DEPARTURE…….+81
TOTAL COOLING UNITS FOR THE SEASON………….440 DEPARTURE……+120
TOTAL COOLING UNITS LAST SEASON TO DATE……..350 DEPARTURE…….+90

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 ESE @ 10:40 A.M.
VECTOR #1 (1-Sec)……….17 SSE @ 02:31 A.M.
VECTOR #2 (1-Sec)……….18 SSE @ 03:30 A.M.
DAVIS #1……………….16 S @ 12:04 A.M.
DAVIS #2 ………………21 S @ 12:00 A.M.
RMY #1 (Instantaneous)…..17 SSE @ 02:29 A.M.
RMY #2 (Instantaneous)…..19 SSE @ 03:30 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………12 SSE @ 02:17 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 @ 02:33 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 @ 02:32 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………12 ESE @ 10:41 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 S @ 12:00 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..12 SSE @ 03:48 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 SSE @ 02:32 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….6.8 SE [162 total miles] VECTOR #1……………..7.1
VECTOR #2……………..7.5
DAVIS #1………………6.8 SE
DAVIS #2………………6.9 SE
RMY #1………………..6.8 SE
RMY #2………………..7.5 SE
RICHARDS (C5C)…………OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.07 DEPARTURE…..-0.04
TOTAL PRECIPITATION FOR THE MONTH…………..2.21 DEPARTURE…..-0.34
TOTAL PRECIPITATION FOR THE YEAR (2024)…….37.89 DEPARTURE…..+8.11

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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/…/.. 18 WSW VEC1 18 WSW RMY 18
7/22 83/66/75/+2/T/…/.. 24 SSW VEC1 23 SSW RMY 23
7/23 75/65/70/-3/0.02/…/.. 17 ESE VEC1 17 SSE RMY 17