Friday, June 21, 2024
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, JUNE 21, 2024
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0408E
SUNSET: 1925E
MUCH COOLER AND BECOMING LESS HUMID WITH INCREASING SUNSHINE….
The heatwave has come to an end with today featuring a warm
and very humid start, then cooling off into the afternoon as
a brisk onshore flow took over. Varying amounts of cloud
cover was observed this morning, however with the stabilizing
effect of the onshore flow, the convective clouds have cleared
the area leaving us with mainly clear skies early this
afternoon.
Temperatures rose quickly into the low to mid 80s this morning,
but has since dropped back into the mid 70s thanks to the
refreshing ocean air infiltrating the area. The dew point,
which started the day in the low 70s, has dropped back into
the low to mid 60s, making for a much better feel to the air,
especially compared to yesterday.
The wind started the day on the light side, but has freshened
markedly since shifting to onshore. The average speed for
the day so far is around 10mph, although it’s been averaging
around 14-15mph for the past couple of hours. The peak gust
so far is 28mph, which occurred just after noon time.
Visibility has been limited once again today due to the
haziness. The view has been between 25-30 miles all day.
The maximum temperature so far today is 83F degrees, which is
6 degrees above the normal high of 77F. The minimum temperature
since midnight is 68F, which is 8 degrees above the normal
low of 60F.
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Today’s Observations:
7 A.M.
Weather: Thin broken cirrus, few altocumulus/castellanus all
quadrants
Temperature: 73F; Dew Point: 69F; Relative Humidity: 88%
Wind: NNW @ 5 kts, wind light
Sea-level pressure: 1022.7 mb; 30.20 in. Hg: rising, then falling
Visibility: 25 miles, thin fog
6-hr Max temp: 73F
6-hr Min temp: 68F
24-hr Precip: 0.10 inches
BHO SA 1155 E250 -BKN 25 227/73/69/3305/020/ FEW AC/ACC ALQDS
THN F ALQDS WND LGT/ 8/081 50002 70010 10073 20068
10 A.M.
Weather: Scattered cumulus, broken altocumulus/castellanus,
thin broken cirrus
Temperature: 81F; Dew Point: 70F; Relative Humidity: 70%
Wind: NE @ 8 kts
Sea-level pressure: 1022.7 mb; 30.29 in. Hg: falling, then rising
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 20 SCT 120 BKN 250 -BKN 30 227/81/70/0508/020/ HAZY/
8/281 55000
1 P.M.
Weather: Clear, few cumulonimbus distant W-WNW, few cumulus distant
SSW-NW, few stratocumulus distant ESE-SSE, few altocumulus distant
NW-NE, few cirrus distant NE
Temperature: 75F; Dew Point: 63F; Relative Humidity: 66%
Wind: E @ 11G20 kts
Sea-level pressure: 1022.5 mb; 30.19 in. Hg: rising, then falling
Visibility: 30 miles, hazy
6-hr Max temp: 83F
6-hr Min temp: 73F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 30 225/75/63/0811G20/019/ FEW CB DSNT W-WNW
FEW CU DSNT SSW-NW FEW SC DSNT ESE-SSE FEW AC DSNT NW-NE
FEW CI DSNT NE HAZY/ 8/331 58002 10083 20073
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SUMMARY FOR THURSDAY, JUNE 20, 2024
TEMPERATURE (DEGREES F)
MAX…….94R NORMAL…..77
MIN…….68R NORMAL…..59
MEAN……81 NORMAL…..68
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….+13
TOTAL DEPARTURE FOR THE MONTH…………………….
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH……………11 DEPARTURE…….-48
TOTAL HEATING UNITS FOR THE SEASON…………5390 DEPARTURE……-813
TOTAL HEATING UNITS LAST SEASON TO DATE…….5288 DEPARTURE……+102
COOLING DEGREE DAYS (SEASON: JAN 2024 THRU DEC 2024)
TOTAL COOLING UNITS FOR YESTERDAY……………16 DEPARTURE…….+12
TOTAL COOLING UNITS FOR THE MONTH……………84 DEPARTURE…….+27
TOTAL COOLING UNITS FOR THE SEASON………….121 DEPARTURE…….+36
TOTAL COOLING UNITS LAST SEASON TO DATE………68 DEPARTURE…….+53
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)……….E36 NNW @ 08:25 P.M.
VECTOR #1 (1-Sec)……….37 NNW @ 08:05 P.M.
VECTOR #2 (1-Sec)……….38 NNW @ 07:42 P.M.
DAVIS #1……………….34 N @ 08:05 P.M.
DAVIS #2 ………………32 N @ 07:51 P.M.
RMY #1 (Instantaneous)…..36 NNW @ 08:05 P.M.
RMY #2 (Instantaneous)…..37 NNW @ 07:42 P.M.
MERLIN…………………33 NNW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………..
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..25 @ 08:06 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24 @ 07:43 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 NNW @ 08:06 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 N @ 07:43 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..25 NNW @ 08:06 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 NNW @ 07:43 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….9.7 WSW [232 total miles]
VECTOR #1…………….10.0
VECTOR #2…………….10.1
DAVIS #1………………9.8 WSW
DAVIS #2……………..10.0 WSW
RMY #1………………..9.8 WSW
RMY #2……………….10.1 WSW
RICHARDS (C5C)…………OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.10 DEPARTURE…..-0.06
TOTAL PRECIPITATION FOR THE MONTH…………..1.48 DEPARTURE…..-1.76
TOTAL PRECIPITATION FOR THE YEAR (2024)…….32.30 DEPARTURE…..+6.46
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PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(
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
6/1 79/53/66/+4/0.00/878/97 18 WNW VEC1 20 NW RMY 20
6/2 83/52/68/+6/0.00/780/86 21 W VEC1 21 W RMY 21
6/3 78/57/68/+6/0.00/626/69 22 NE VEC1 22 NE RMY 21
6/4 75/55/65/+2/0.00/817/90 20 SSW VEC1 19 SSW RMY 19
6/5 84/56/70/+7/T/564/62 29 SW VEC1 28 SW RMY 29
6/6 74/60/67/+4/0.01/064/07 20 SSE VEC1 20 SSE RMY 20
6/7 80/60/70/+6/0.14/410/45 26 WNW VEC1 27 WNW RMY 27
6/8 73/54/64/0/T/767/84 48 W VEC1 49 W RMY 47
6/9 67/55/61/-3/0.25/292/32 29 WNW VEC1 28 WNW RMY 26
6/10 75/54/65/0/T/868/95 28 W VEC1 27 W RMY 27
6/11 71/53/62/-3/0.00/320/35 16 WNW VEC1 15 WNW RMY 15
6/12 76/59/68/+3/0.00/531/58 16 S VEC1 16 SSE RMY 17
6/13 82/57/70/+4/0.00/869/95 28 SW VEC1 27 SW RMY 28
6/14 84/63/74/+9/0.75/476/52 50 NW VEC1 50 NW RMY 53 TSTM
6/15 75/54/66/0/0.23/824/90 23 NNW VEC1 27 NW RMY 26
6/16 72/51/62/-5/0.00/815/89 22 SSE VEC1 23 S RMY 23
6/17 80/56/68/+1/0.00/596/65 30 SSW VEC1 31 SSW RMY 31
6/18 92/64/78/+11/0.00/853/93 24 SW VEC1 23 SSW RMY 23
6/19 93/66/80/+12/0.00/642/70 24 SW VEC1 24 SW RMY 25
6/20 94/68/81/+13/0.10/706/77 36 NNW VEC1 37 NNW RMY 36 TSTM
6/21 The low since midnight is 68F, the daily normal low is 60F.
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JUNE DAILY RECORDS TO DATE
6/19 RECORD MAXIMUM TEMPERATURE OF 93F,
BEATING THE PREVIOUS RECORD OF 92F SET IN 1923
6/20 RECORD MAXIMUM TEMPERATURE OF 94F,
TIED WITH PREVIOUS RECORD SET IN 1953
6/20 RECORD HIGH MINIMUM TEMPERATURE OF 68F,
TIED WITH PREVIOUS RECORD SET IN 1923 AND 1931
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JUNE 21
HIGH 94F IN 2012
LOW 42F IN 1940
PRECIP 1.40 INS 1903
PEAK GUST 51 MPH SSW IN 2000
RECORDS FOR JUNE 22
HIGH 93F IN 1921, 2012
LOW 43F IN 1940
PRECIP 1.57 INS IN 1900
PEAK GUST 74 MPH NW IN 1988
TODAY’S REPORT PREPARED BY: Matt Douglas
