Tuesday, July 9, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, JULY 9, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0417E
SUNSET: 1922E
THE SUMMER PATTERN CONTINUES WITH HAZY, HOT, AND HUMID WEATHER
PERSISTING ….
The summer weather continues as we have yet another day with
temperatures above normal along with high levels of humidity.
An area of mid level clouds moved over the area from late
morning into the very early part of the afternoon, which has
helped to cap the temperature in the upper 80s so far. If not
for this cloud patch, we would have easily made it to the mid
90s. Either way, as the cloud patch moves out and the sun
returns, the temperature should still reach 90F today.
The dew point is in the mid 70s, so it’s oppressive out there.
The heat index at the 1pm observation is 99F with an air
temperature of 88F and a dew point of 76F!
Making matters a bit worse is the fact that today is another
low wind day. The average speed for the day so far is only
around 8mph. The peak gust so far is 18mph, which occurred
just after the 1pm observation.
Visibility has been limited today due to haziness, generally
holding around 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 72F, which is 8 degrees above the normal low of 64F.
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Today’s Observations:
7 A.M.
Weather: Borken cirrus, stratus layer distant ESE-S-W
Temperature: 76F; Dew Point: 72F; Relative Humidity: 94%
Wind: SW @ 6 kts, wind light
Sea-level pressure: 1016.4 mb; 30.01 in. Hg: rising, then falling
Visibility: 30 miles, thin fog
6-hr Max temp: 76F
6-hr Min temp: 72F
24-hr Precip: 0.00 inches
BHO SA 1155 E250 BKN 30 164/76/72/2206/001/ ST LYR DSNT ESE-S-W
THN F ALQDS WND LGT/ 8/604 50000 10076 20072
10 A.M.
Weather: Broken altocumulus/castellanus/altostratus, overcast cirrus,
few stratus fractus distant SE-SSW
Temperature: 84F; Dew Point: 72F; Relative Humidity: 67%
Wind: SSW @ 7 kts
Sea-level pressure: 1016.1 mb; 30.01 in. Hg: falling, then steady
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E120 BKN 250 OVC 30 161/84/72/2107/001/ FEW STFRA DSNT
SE-SSW SUN DMLY VSBL HAZY/ 8/772 56003
1 P.M.
Weather: Broken cirrus, few cumulus distant SW-NW, few altocumulus
W-NNW
Temperature: 88F; Dew Point: 76F; Relative Humidity: 67%
Wind: SSW @ 6 kts, wind light
Sea-level pressure: 1014.9 mb; 29.97 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 88F
6-hr Min temp: 76F
6-hr Precip: 0.00 inches
BHO SA 1755 E250 BKN 30 149/88/76/2006/997/ FEW CU DSNT SW-NW
FEW AC W-NNW HAZY WND LGT HX 99/ 8/252 58012 10088 20076
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SUMMARY FOR MONDAY, JULY 8, 2024
TEMPERATURE (DEGREES F)
MAX…….91 NORMAL…..81
MIN…….71 NORMAL…..63
MEAN……81 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………..+9
TOTAL DEPARTURE FOR THE MONTH…………………….+24 [+2.8 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……..-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……………16 DEPARTURE……..+8
TOTAL COOLING UNITS FOR THE MONTH……………78 DEPARTURE…….+21
TOTAL COOLING UNITS FOR THE SEASON………….256 DEPARTURE…….+60
TOTAL COOLING UNITS LAST SEASON TO DATE……..200 DEPARTURE…….+56
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)……….E17 NW @ 03:13 P.M.
VECTOR #1 (1-Sec)……….18 NW @ 03:13 P.M.
VECTOR #2 (1-Sec)……….18 SSE @ 08:14 P.M.
DAVIS #1……………….18 S @ 08:42 P.M.
DAVIS #2 ………………22 S @ 08:42 P.M.
RMY #1 (Instantaneous)…..18 S @ 08:30 P.M.
RMY #2 (Instantaneous)…..18 SSE @ 08:14 P.M.
MERLIN…………………16 NW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………12 S @ 08:28 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 @ 08:15 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 @ 08:15 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………12 WNW @ 03:14 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 S @ 07:22 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 S @ 08:31 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 SSE @ 08:15 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….5.5 W [131 total miles]
VECTOR #1……………..6.4
VECTOR #2……………..6.4
DAVIS #1………………5.9 W
DAVIS #2………………5.8 W
RMY #1………………..6.2 W
RMY #2………………..6.5 W
RICHARDS (C5C)…………OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.10
TOTAL PRECIPITATION FOR THE MONTH…………..0.43 DEPARTURE…..-0.44
TOTAL PRECIPITATION FOR THE YEAR (2024)…….36.11 DEPARTURE…..+8.01
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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/+2/0.10/…/.. 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 The low since midnight is 72F, the daily normal low is 64F.
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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 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
