Monday, August 5, 2024

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

MONDAY, AUGUST 5, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0441E
SUNSET:  1858E

WARM AND HUMID ONCE AGAIN UNDER MAINLY SUNNY SKIES….

Showers and thunderstorms yesterday afternoon and evening
left 0.20″ of rain in the gauge, but brought heavier amounts
to areas just north and south of the Hill.

As for today, skies were mainly clear into early this
afternoon, however both low convective and high cirrus clouds
have begun to increase in coverage as we progress through
the afternoon.

Temperatures have warmed well into the 80s, so it’s another
very warm day out there. The dew point remains in the upper
60s to low 70s, thus the muggy feel continues to be with us.
The combination of the temperature and dew point is still
making the heat index reach the low 90s.

Winds have been decreasing since the overnight hours. The
average speed for the day so far is around 8mph, but it’s
been averaging around 3-4mph for the past couple of hours.
The peak gust for the day to this point is 18mph, which
occurred after midnight.

Visibility has been limited today due to thin fog early this
morning, and general haziness thereafter. The views has been
held to around 25-30 miles all day.

The maximum temperature so far today is 88F, which is 6 degrees
above the normal high of 82F. The minimum temperature since
midnight is 67F, which is 3 degrees above the normal low of 64F.

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Today’s Observations:

7 A.M.
Weather: Clear, few cirrus distant W-N
Temperature: 71F; Dew Point: 70F; Relative Humidity: 97%
Wind: NW @ 7 kts
Sea-level pressure: 1016.7 mb; 30.02 in. Hg: rising, then more rapidly
Visibility: 25 miles, thin fog
6-hr Max temp: 71F
6-hr Min temp: 67F
24-hr Precip:  0.20 inches
BHO SA 1155 CLR 25 167/71/70/3207/002/ FEW CI DSNT W-N THN F ALQDS/
8/001 53020 70020 10071 20067

10 A.M.
Weather: Clear, few cumulus distant WNW-NW and distant ESE-SE,
few cirrus distant NW-N
Temperature: 80F; Dew Point: 70F; Relative Humidity: 72%
Wind: NW @ 5 kts, wind light
Sea-level pressure: 1017.0 mb; 30.03 in. Hg: rising, then falling
Visibility: 25 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 25 170/80/70/3205/003/ FEW CU DSNT WNW-NW AND DSNT
ESE-SE FEW CI DSNT NW-N HAZY WND LGT/ 8/201 50003

1 P.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 86F; Dew Point: 69F; Relative Humidity: 57%
Wind: SSW @ 6 kts, wind light
Sea-level pressure: 1015.7 mb; 29.99 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 88F
6-hr Min temp: 71F
6-hr Precip: 0.00 inches
BHO SA 1755 45 SCT 250 SCT 30 157/86/69/2006/999/ HAZY WND LGT/
8/204 58013 10088 20071

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SUMMARY FOR SUNDAY, AUGUST 4, 2024

TEMPERATURE (DEGREES F)
MAX…….85  NORMAL…..82
MIN…….68  NORMAL…..64
MEAN……77  NORMAL…..73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+4
TOTAL DEPARTURE FOR THE MONTH…………………….+35 [+8.6 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……..-1
TOTAL HEATING UNITS FOR THE SEASON……………0  DEPARTURE……..-8
TOTAL HEATING UNITS LAST SEASON TO DATE……….0  DEPARTURE………0

COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY……………12  DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE MONTH……………67  DEPARTURE…….+35
TOTAL COOLING UNITS FOR THE SEASON………….564  DEPARTURE……+145
TOTAL COOLING UNITS LAST SEASON TO DATE……..433  DEPARTURE……+131

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)……….E29 WSW  @   01:25 P.M.
VECTOR #1 (1-Sec)……….29 WSW  @   01:25 P.M.
VECTOR #2 (1-Sec)……….30 WSW  @   01:24 P.M.
DAVIS #1……………….27 W    @   01:25 P.M.
DAVIS #2 ………………29 WSW  @   01:24 P.M.
RMY #1 (Instantaneous)…..31 WSW  @   01:25 P.M.
RMY #2 (Instantaneous)…..33 WSW  @   01:24 P.M.
MERLIN…………………29 WSW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 WSW  @   01:50 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21      @   01:26 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23      @   01:26 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 WSW  @   01:25 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 WSW  @   01:26 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 WSW  @   01:26 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 WSW  @   01:26 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….9.9 SW [238 total miles] VECTOR #1…………….10.2
VECTOR #2…………….10.6
DAVIS #1……………..10.0 WSW
DAVIS #2……………..10.4 WSW
RMY #1……………….10.1 WSW
RMY #2……………….10.5 SW
RICHARDS (C5C)…………OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.20 DEPARTURE…..+0.07
TOTAL PRECIPITATION FOR THE MONTH…………..0.21 DEPARTURE…..-0.31
TOTAL PRECIPITATION FOR THE YEAR (2024)…….38.46 DEPARTURE…..+7.24

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PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1   92/71/82/+9/T/…/..                24 W   VEC1 24 W   RMY 23
8/2   94/73/84/+11/0.01/…/..            31 SSW VEC1 31 SSW RMY 30 TSTM
8/3   92/75/84/+11/0.00/…/..            29 W   VEC1 28 W   RMY 28
8/4   85/68/77/+4/0.20/…/..             29 WSW VEC1 29 WSW RMY 31 TSTM

8/5  The low since midnight is 67F, the daily normal low is 64F.

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AUGUST DAILY RECORDS TO DATE

8/3  RECORD HIGH MINIMUM TEMPERATURE OF 75F,
TIED THE PREVIOUS RECORD SET IN 2020

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

RECORDS FOR AUGUST 5
HIGH 98F IN 1955
LOW 48F IN 1929,1972
PRECIP 2.97 INCHES IN 1893
PEAK GUST 60e MPH SW 1977

RECORDS FOR AUGUST 6
HIGH 95F IN 1931, 2022
LOW 48F IN 1934
PRECIP 1.47 INCHES IN 1995
PEAK GUST 44e MPH SSW IN 1940

TODAY’S REPORT PREPARED BY: Matt Douglas