Sunday, July 7, 2024

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

SUNDAY, JULY 7, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0415E
SUNSET:  1923E

HOT AND HUMID WITH VERY LITTLE WIND….

The tropical air mass remains in place, as we yet again experienced
temperatures in the low 80’s and dew points in the mid 70’s. We
observed very little wind, being light and variable around 2 knots
on average.

Visibility was limited this morning, but reached 70 miles by the
1 PM observation. Skies were mostly cloudy this morning, but the
sun broke out half past noontime.

The maximum temperature so far today is 82F, which is a degree
above the normal high of 81F. The minimum temperature since
midnight is 72F, which is 9 degrees above the normal low of 63F.

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Today’s Observations:

7 A.M.
Weather: Scattered cumulus, broken altocumulus, few stratus fractus
Temperature: 75F; Dew Point: 74F; Relative Humidity: 97%
Wind: WNW @ 2 kts, wind light and variable
Sea-level pressure: 1015.9 mb; 29.99 in. Hg: rising unsteadily
Visibility: 40 miles, thin fog
6-hr Max temp: 75F
6-hr Min temp: 72F
24-hr Precip:  0.10 inches
BHO SA 1155 20 SCT 120 BKN 40 159/75/74/3002/999/ FEW STFRA ALQDS
THN F ALQDS WND L/V/ 8/550 52011 70010 10075 20072

10 A.M.
Weather: Scattered altocumulus, overcast cirrocumulus with breaks
Temperature: 81F; Dew Point: 70F; Relative Humidity: 70%
Wind: S @ 2 kts, light and variable
Sea-level pressure: 1016.3 mb; 30.00 in. Hg: rising unsteadily
Visibility: 50 miles
3-hr Precip: 0.00 inches
BHO SA 1455 120 SCT 220 OVC 50 163/81/70/1802/000/ FEW CU E-S-SSW
FEW BINOVC ALQDS WND L/V/ 8/159 52004

1 P.M.
Weather: Scattered cumulus, broken altocumulus and cirrocumulus
Temperature: 82F; Dew Point: 70F; Relative Humidity: 68%
Wind: W @ 4 kts, light and variable
Sea-level pressure: 1016.1 mb; 29.99 in. Hg: steady, falling then rising
Visibility: 70 miles, hazy E-S-SW, visibility 30 miles in that sector
6-hr Max temp: 82F
6-hr Min temp: 75F
6-hr Precip: 0.00 inches
BHO SA 1755 30 SCT 180 BKN 220 BKN 70 161/82/70/2704/999/ HAZY E-S-SW
VSBY 30 MI E-S-SW WND L/V/ 8/159 50002 10082 20075

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SUMMARY FOR SATURDAY, JULY 6, 2024

TEMPERATURE (DEGREES F)
MAX…….77  NORMAL…..81
MIN…….71  NORMAL…..63
MEAN……74  NORMAL…..72

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+2
TOTAL DEPARTURE FOR THE MONTH……………………..+7 [+0.8 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……..-2
TOTAL HEATING UNITS FOR THE SEASON……………0  DEPARTURE……..-2
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……..+2
TOTAL COOLING UNITS FOR THE MONTH……………47  DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE SEASON………….225  DEPARTURE…….+44
TOTAL COOLING UNITS LAST SEASON TO DATE……..175  DEPARTURE…….+50

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)……….E30 SSW  @   12:06 P.M.
VECTOR #1 (1-Sec)……….33 SSW  @   12:05 P.M.
VECTOR #2 (1-Sec)……….33 SSW  @   12:12 P.M.
DAVIS #1……………….33 S    @   10:44 P.M.
DAVIS #2 ………………36 S    @   10:30 P.M.
RMY #1 (Instantaneous)…..33 SSW  @   12:07 P.M.
RMY #2 (Instantaneous)…..34 SSW  @   12:07 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………25 SSW  @   12:10 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..24      @   12:07 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..25      @   12:07 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………23 S    @   12:07 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 SSW  @   12:07 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..23 SSW  @   12:07 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..25 SSW  @   12:07 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……13.8 SSW [331 total miles] VECTOR #1…………….13.8
VECTOR #2…………….14.6
DAVIS #1……………..13.3 SSW
DAVIS #2……………..14.6 SSW
RMY #1……………….13.5 SSW
RMY #2……………….14.8 SSW
RICHARDS (C5C)…………OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.10 DEPARTURE…..-0.01
TOTAL PRECIPITATION FOR THE MONTH…………..0.43 DEPARTURE…..-0.24
TOTAL PRECIPITATION FOR THE YEAR (2024)…….36.11 DEPARTURE…..+8.21

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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/…/..             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/…./…/..             30 SW  VEC1 33 SSW RMY 33

7/7  The low since midnight is 72F, the daily normal low is 63F.

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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 7
HIGH 97F IN 1908,1993
LOW 48F IN 1902
PRECIP 2.11 INS IN 1966
PEAK GUST 63 MPH NW IN 2021

RECORDS FOR JULY 8
HIGH 95F IN 1981
LOW 50F IN 1919
PRECIP 1.74 INS IN 1916
PEAK GUST 46e SSW IN 1941

TODAY’S REPORT PREPARED BY: Benjamin Turner