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Wednesday, July 10, 2024

July 10, 2024

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, JULY 10, 2024 ALL TIMES ARE…

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

WEDNESDAY, JULY 10, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0417E
SUNSET:  1922E

HOT TEMPERATURES AND OPPRESSIVE HUMIDITY LEVELS MAKING FOR
A DANGEROUS DAY TO BE OUTDOORS….

The summer weather continues as we have yet another day with
temperatures above normal along with oppressive levels of
humidity. Temperatures are pushing into the upper 80s early
this afternoon under filtered sunshine.

The dew point however is in the mid 70s making for very
oppressive conditions. The heat index has pushed into mid to
upper 90s early this afternoon, as such it’s not a good
day to be doing any prolonged activity outdoors.

The one saving grace is the wind. It’s definitely more active
than it’s been over the past few days. The average speed for
the day so far is around 10mph, but it’s been increasing this
afternoon with frequent gusts exceeding 20mph. The peak gust
so far is 28mph, which occurred just after the 1pm observation.

Visibility has been limited today due to fog and then just
haziness. We started the day with less than 1/4 mile visibility,
and it has only improved to around 30 miles by early this
afternoon.

The maximum temperature so far today is 88F, which is 6 degrees
above the normal high of 82F. The minimum temperature since
midnight is 72F, which is 8 degrees above the normal low of 64F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 75F; Dew Point: 75F; Relative Humidity: 100%
Wind: SSW @ 7 kts
Sea-level pressure: 1013.9 mb; 29.94 in. Hg: falling unsteadily
Visibility: 4 miles, fog
6-hr Max temp: 75F
6-hr Min temp: 72F
24-hr Precip:  Trace
BHO SA 1155 E3 OVC 4F 139/75/75/2107/994/ 8/6// 52006 70000
10075 20072

10 A.M.
Weather: Scattered cirrocumulus, thin broken cirrus, few cumulus/
cumulus fractus all quadrants
Temperature: 84F; Dew Point: 76F; Relative Humidity: 76%
Wind: SSW @ 8 kts
Sea-level pressure: 1013.5 mb; 29.93 in. Hg: falling, then more rapidly
Visibility: 20 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 190 SCT 250 -BKN 20 135/84/76/2008/993/ FEW CU/CUFRA
ALQDS HAZY/ 8/209 58004

1 P.M.
Weather: Scattered cumulus, thin broken cirrus
Temperature: 87F; Dew Point: 75F; Relative Humidity: 67%
Wind: SSW @ 14G23 kts
Sea-level pressure: 1012.4 mb; 29.90 in. Hg: falling, then more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 88F
6-hr Min temp: 75F
6-hr Precip: 0.00 inches
BHO SA 1755 25 SCT 250 -BKN 30 124/87/75/2114G23/990/ HAZY HX 96/
8/201 56011 10088 20075

————————————————————–

SUMMARY FOR TUESDAY, JULY 9, 2024

TEMPERATURE (DEGREES F)
MAX…….88  NORMAL…..82
MIN…….72  NORMAL…..64
MEAN……80  NORMAL…..73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+7
TOTAL DEPARTURE FOR THE MONTH…………………….+31 [+3.2 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……..-3
TOTAL HEATING UNITS FOR THE SEASON……………0  DEPARTURE……..-3
TOTAL HEATING UNITS LAST SEASON TO DATE……….0  DEPARTURE………0

COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY……………15  DEPARTURE……..+7
TOTAL COOLING UNITS FOR THE MONTH……………93  DEPARTURE…….+28
TOTAL COOLING UNITS FOR THE SEASON………….271  DEPARTURE…….+67
TOTAL COOLING UNITS LAST SEASON TO DATE……..210  DEPARTURE…….+61

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)……….E26 SSW  @   04:14 P.M.
VECTOR #1 (1-Sec)……….27 SSW  @   03:51 P.M.
VECTOR #2 (1-Sec)……….27 S    @   03:32 P.M.
DAVIS #1……………….28 S    @   04:14 P.M.
DAVIS #2 ………………31 S    @   04:34 P.M.
RMY #1 (Instantaneous)…..29 SSW  @   03:51 P.M.
RMY #2 (Instantaneous)…..28 SSW  @   04:15 P.M.
MERLIN…………………26 SW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 SSW  @   03:54 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20      @   04:15 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21      @   04:15 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 S    @   04:15 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 SSW  @   04:15 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 SSW  @   04:15 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 SSW  @   04:15 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….9.1 SSW [218 total miles] VECTOR #1……………..9.5
VECTOR #2……………..9.8
DAVIS #1………………9.0 SSW
DAVIS #2………………9.6 SSW
RMY #1………………..9.3 SSW
RMY #2……………….10.0 SSW
RICHARDS (C5C)…………OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..0.43 DEPARTURE…..-0.55
TOTAL PRECIPITATION FOR THE YEAR (2024)…….36.11 DEPARTURE…..+7.90

————————————————————–

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/…/..             25 S   VEC1 25 S   RMY 26
7/4   85/62/74/+2/0.04/…/..             28 SSW VEC1 28 SSW RMY 28
7/5   84/68/76/+4/0.22/…/..             29 SSW VEC1 29 SSW RMY 29
7/6   77/71/74/+2/0.10/…/..             31 SW  VEC1 33 SSW RMY 33
7/7   88/72/80/+8/0.00/…/..             15 SW  VEC1 15 SW  RMY 14
7/8   91/71/81/+9/0.00/…/..             17 NW  VEC1 18 NW  RMY 18
7/9   88/72/80/+7/T/…/..                26 SSW VEC1 27 SSW RMY 29

7/10  The low since midnight is 72F, the daily normal low is 64F.

————————————————————–

JULY DAILY RECORDS TO DATE

NONE.

————————————————————–

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR JULY 10
HIGH 99F IN 1911
LOW 46F IN 1890
PRECIP 1.95 INS IN 2015
WIND 75 MPH W IN 1985

RECORDS FOR JULY 11
HIGH 98F IN 1911
LOW 49F IN 1890
PRECIP 1.87 INS IN 1959
WIND 53 MPH NW IN 1988

TODAY’S REPORT PREPARED BY: Matt Douglas

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Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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