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Thursday, July 11, 2024

July 11, 2024

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JULY 11, 2024 ALL TIMES ARE…

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

THURSDAY, JULY 11, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0418E
SUNSET:  1921E

WARM AND VERY HUMID AIR MASS REMAINS IN PLACE OVER THE AREA….

Clouds and thin fog dominated during the morning hours with a
few light rain showers very early this morning and a very light
drizzle that continued into the late morning hours. Clouds have
finally broken early this afternoon. The sun quickly went to
work allowing temperatures to rapidly rise into the mid 80s.

Dew point readings remain on the high side with readings
holding in the mid 70s, so the air mass continues to be on the
oppressive side. Despite the air temperature in the mid 80s
early this afternoon, the heat index is approaching the mid
90s thanks to the high humidity levels.

The wind has been busy all day with an average speed for the
day so far of around 17mph. Gusts have been frequently reaching
between 25-30mph today. The peak gust so far is 33mph, which
occurred just before the 1pm observation.

Visibility was quite limited this morning thanks to the thin
fog and drizzle with the view generally around 10 miles,
however it did dip to as low as 4 miles at times. The view has
improved early this afternoon to around 35 miles with general
haziness the theme now.

The maximum temperature so far today is 85, which is 3 degrees
above the normal high of 82F. The minimum temperature since
midnight is 73F, which is 9 degrees above the normal low of 64F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratus, very light drizzle
Temperature: 75F; Dew Point: 74F; Relative Humidity: 97%
Wind: SSW @ 13G22 kts, peak wind SSW 30mph at 6:07 A.M.
Sea-level pressure: 1011.9 mb; 29.88 in. Hg: rising steadily
Visibility: 10 miles, 4 miles E-SSW, thin fog
6-hr Max temp: 75F
6-hr Min temp: 74F
24-hr Precip:  0.01 inches
BHO SA 1155 E7 OVC 10L- 119/75/74/2013G22/988/ THN F ALQDS RW-B11E17
L-B45 PCPN VRY LGT VSBY 4 E-SSW PK WND 2126/07/ 8/6// 52012 6001/
70001 10075 20074

10 A.M.
Weather: Overcast stratus, very light drizzle
Temperature: 76F; Dew Point: 74F; Relative Humidity: 95%
Wind: SSW @ 12G18 kts
Sea-level pressure: 1012.8 mb; 29.91 in. Hg: rising, then more slowly
Visibility: 15 miles, thin fog
3-hr Precip: Trace
BHO SA 1455 E7 OVC 15L- 128/76/74/2012G18/991/ THN F ALQDS PCPN VRY LGT/
8/6// 51009 6000/

1 P.M.
Weather: Scattered cumulus/cumulus fractus, scattered altocumulus,
thin scattered cirrus
Temperature: 85F; Dew Point: 74F; Relative Humidity: 71%
Wind: SSW @ 15G26 kts, peak wind SW 33mph at 12:44 P.M.
Sea-level pressure: 1013.1 mb; 29.92 in. Hg: rising, then falling
Visibility: 35 miles, hazy
6-hr Max temp: 85F
6-hr Min temp: 75F
6-hr Precip: Trace
BHO SA 1755 27 SCT 100 SCT 250 -SCT 35 131/85/74/2115G26/992/
HAZY PK WND 2229/44/ 8/251 50003 10085 20075

————————————————————–

SUMMARY FOR WEDNESDAY, JULY 10, 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…………………….+38 [+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……..-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…………..108  DEPARTURE…….+35
TOTAL COOLING UNITS FOR THE SEASON………….286  DEPARTURE…….+74
TOTAL COOLING UNITS LAST SEASON TO DATE……..214  DEPARTURE…….+72

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)……….E38 SSW  @   09:42 P.M.
VECTOR #1 (1-Sec)……….37 SSW  @   08:13 P.M.
VECTOR #2 (1-Sec)……….38 SSW  @   05:59 P.M.
DAVIS #1……………….38 S    @   07:20 P.M.
DAVIS #2 ………………40 S    @   04:38 P.M.
RMY #1 (Instantaneous)…..38 SSW  @   05:59 P.M.
RMY #2 (Instantaneous)…..40 SSW  @   05:59 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………30 SSW  @   11:38 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..26      @   11:38 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..27      @   11:38 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 S    @   05:19 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 S    @   05:19 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..26 SSW  @   05:35 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..28 SSW  @   11:38 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……14.2 SSW [340 total miles] VECTOR #1…………….14.1
VECTOR #2…………….15.0
DAVIS #1……………..13.7 SSW
DAVIS #2……………..15.0 SSW
RMY #1……………….13.9 SSW
RMY #2……………….15.2 SSW
RICHARDS (C5C)…………OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.01 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..0.44 DEPARTURE…..-0.66
TOTAL PRECIPITATION FOR THE YEAR (2024)…….36.12 DEPARTURE…..+7.79

————————————————————–

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  The low since midnight is 73F, 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 11
HIGH 98F IN 1911
LOW 49F IN 1890
PRECIP 1.87 INS IN 1959
WIND 53 MPH NW IN 1988

RECORDS FOR JULY 12
HIGH 96F IN 1908
LOW 48F IN 1945
PRECIP 1.43 INS IN 1975
WIND 48e MPH SSW IN 1944

TODAY’S REPORT PREPARED BY: Matt Douglas

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

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