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Sunday, July 9, 2023

July 9, 2023

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, JULY 9, 2023 ALL TIMES ARE…

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

SUNDAY, JULY 9, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0416E
SUNSET:  1923E

WARM AND HUMID WITH A LOT OF CLOUD COVER TODAY AT BLUE HILL….

We started the day with dense fog limiting visibility to a 1/4
mile or less. The fog gradually lifted by mid morning, but the
clouds have been hanging around with very little sunshine.

Despite the lack of sunshine, temperatures have risen into the
upper 70s and low 80s after a morning low in the upper 60s.
The dew point continues on the high side with readings in the
low 70s. So there is plenty of moisture in the air making it
feel quite sticky.

Winds have been light yet again today with an average speed of
only around 5mph. Wind direction has been generally variable with
such light speeds. The highest gust so far today is only around
15mph!

Visibility improved from 1/4 mile early this morning to around
30 miles early this afternoon.

The maximum temperature so far today is 81F, this is 1 degrees
below the normal high of 82F. The minimum since midnight is 69F,
which is 5 degrees above the normal low of 64F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 200ft, light drizzle
Temperature: 70F; Dew Point: 70F; Relative Humidity: 100%
Wind: SE @ 2 kts, wind light
Sea-level pressure: 1013.1 mb; 29.92 in. Hg: falling, then rising
Visibility: 1/4 mile, fog
6-hr Max temp: 70F
6-hr Min temp: 69F
24-hr Precip: Trace
BHO SA 1155 X W2 1/4L-F 131/70/70/1402/992/ WND LGT/ 8////
53008 6000/ 70000 10070 20069

10 A.M.
Weather: Broken stratocumulus, broken altocumulus, thin broken cirrus
Temperature: 77F; Dew Point: 70F; Relative Humidity: 78%
Wind: E @ 3 kts, wind light and variable
Sea-level pressure: 1013.0 mb; 29.91 in. Hg: falling, then steady
Visibility: 25 miles, hazy
3-hr Precip: Trace
BHO SA 1455 E15 BKN 150 BKN 250 -BKN 25 130/77/70/0903/991/
HAZY WND L/V/ 8/251 56001 6000/

1 P.M.
Weather: Scattered cumulus, broken altocumulus, broken cirrostratus,
towering cumulus all quadrants, fog bank offshore NE-ESE
Temperature: 78F; Dew Point: 71F; Relative Humidity: 80%
Wind: NE @ 7 kts
Sea-level pressure: 1011.8mb; 29.88 in. Hg: falling, then more rapidly
Visibility: 30 miles, 15 miles NE-ESE, hazy
6-hr Max temp: 81F
6-hr Min temp: 70F
6-hr Precip: Trace
BHO SA 1755 20 SCT E150 BKN 220 BKN 30 118/78/71/0507/988/
TCU ALQDS F BNK OFFSHR NE-ESE VSBY 15 NE-ESE HAZY/ 8/256
58012 6000/ 10081 20070
————————————————————–

SUMMARY FOR SATURDAY, JULY 8, 2023

TEMPERATURE (DEGREES F)
MAX…….84   NORMAL…..81
MIN…….70   NORMAL…..63
MEAN……77   NORMAL…..72

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+5
TOTAL DEPARTURE FOR THE MONTH…………………+18 [+2.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
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 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY……………12  DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE MONTH……………72  DEPARTURE…….+15
TOTAL COOLING UNITS FOR THE SEASON………….200  DEPARTURE……..+4
TOTAL COOLING UNITS LAST SEASON TO DATE……..220  DEPARTURE…….-20

PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated

F420C (Official)……….E20 W     @  12:44 A.M.
VECTOR #1 (1-Sec)……….20 W     @  12:43 A.M.
VECTOR #2 (1-Sec)……….19 WNW   @  12:44 A.M.
DAVIS #1……………….18 W     @  12:43 A.M.
DAVIS #2 ………………17 W     @  12:43 A.M.
RMY #1 (Instantaneous)…..19 W     @  12:43 A.M.
RMY #2 (Instantaneous)…..19 W     @  12:46 A.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……17       @  12:43 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………12 ESE @  04:56 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14     @  04:57 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13     @  04:48 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 W   @  12:45 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 ESE @  04:58 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 ESE @  04:57 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 ESE @  04:48 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………14     @  04:57 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………..5.8 WSW [139 total miles] VECTOR #1…………………6.3
VECTOR #2…………………6.5
DAVIS #1………………….5.9 SSE
DAVIS #2………………….6.1 SSE
RMY #1……………………6.1 SSW
RMY #2……………………6.4 SSW
RICHARDS (C5C)…………….6.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.10
TOTAL PRECIPITATION FOR THE MONTH…………..1.55 DEPARTURE…..+0.68
TOTAL PRECIPITATION FOR THE YEAR…………..26.73 DEPARTURE…..-1.37

————————————————————–

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   80/61/71/0/0.00/567/62              17 SSE  VEC1 16 SSE RMY 17
7/2   74/63/69/-2/0.34/027/03             35 S    VEC1 35 S   RMY 35
7/3   79/63/72/-1/0.40/265/29             18 NNW  VEC1 18 NNW RMY 17 TSTM
7/4   71/65/68/-4/0.81/000/00             17 NE   VEC1 18 NE  RMY 17 TSTM
7/5   88/66/77/+5/0.00/…/..             17 S    VEC1 16 SE  RMY 15
7/6   92/69/81/+9/0.00/…/..             23 SSW  VEC1 22 SSW RMY 23
7/7   87/70/78/+6/0.00/…/..             23 SW   VEC1 22 SW  RMY 23
7/8   84/70/77/+5/0.00/…/..             20 W    VEC1 20 W   RMY 19

7/9 The low since midnight is 69, the daily normal low is 64F

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

RECORDS FOR JULY 9
HIGH 98F IN 1912
LOW 47F IN 1909
PRECIP 3.74 INS IN 1921
WIND 46 MPH NW IN 1992

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

TODAY’S REPORT PREPARED BY: Matt Douglas

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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