Wednesday, June 28, 2023

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

WEDNESDAY, JUNE 28, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0410E
SUNSET: 1925E

MORE CLOUDS THAN SUN WITH SHOWERS AROUND THIS MORNING, STILL HUMID…

The day started off with more showers which lingered around into
the mid morning hours. It’s been dry since, but clouds have mainly
been the theme with only some splashes of sunshine from time to
time. Rainfall this morning amounted to 0.16″. No thunder was
observed here on the Hill today, but areas to the south had loud
thunder early this morning. We’ll see if we get a thunderstorm
later this afternoon or evening.

The temperature has gradually warmed into the mid to upper 70s
this afternoon. Dew points have been hanging out in the upper
60s all day, so it continued to feel sticky out there.

The wind started off on the lighter side this morning, but has
since picked up this afternoon. The average speed so far for the
day is around 11mph. The peak gust so far is just under 30mph,
occurring just before the 1pm observation.

Visibility has been limited all day, generally running 20 miles
or less.

The maximum temperature so far today is 77F, this is 2 degrees
below the normal high of 79F. The minimum since midnight is 66F,
which is 4 degrees above the normal low of 62F.

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Today’s Observations:

7 A.M.
Weather: Broken altocumulus/castellanus, broken nimbostratus,
broken cirrostratus, light rain showers, few stratus fractus
all quadrants few towering cumulus distant W-WNW
Temperature: 67F; Dew Point: 67F; Relative Humidity: 100%
Wind: S @ 7 kts
Sea-level pressure: 1011.0 mb; 29.86 in. Hg: rising, then steady
Visibility: 20 miles, thin fog
6-hr Max temp: 68F
6-hr Min temp: 66F
24-hr Precip: 0.17 inches
BHO SA 1155 E65 BKN 100 BKN 180 OVC 20RW- 110/67/67/1807/986/
FEW STFRA ALQDS FEW TCU DSNT W-NNW THN F ALQDS PCPN VRY LGT/
8/787 51006 6016/ 70017 10068 20066

10 A.M.
Weather: Overcast stratus fractus
Temperature: 70F; Dew Point: 68F; Relative Humidity: 94%
Wind: SSE @ 9 kts
Sea-level pressure: 1010.6 mb; 29.84 in. Hg: falling, then rising
Visibility: 15 miles, thin fog
3-hr Precip: Trace
BHO SA 1455 E10 OVC 15 106/70/68/1609/984/ THN F ALQDS RW-B47E54
VIRGA WNW-NNW VSBY 10 WNW-NNW/ 8/7// 55004 6000/

1 P.M.
Weather: Broken cumulus, broken altocumulus/castellanus,
broken cirrus
Temperature: 75F; Dew Point: 68F; Relative Humidity: 79%
Wind: SSW @ 13G25 kts
Sea-level pressure: 1009.8 mb; 29.82 in. Hg: rising, then falling
Visibility: 20 miles, hazy
6-hr Max temp: 76F
6-hr Min temp: 67F
6-hr Precip: Trace
BHO SA 1755 E20 BKN 150 BKN 250 BKN 20 098/75/68/2013G25/982/
HAZY/ 8/286 58008 6000/ 10076 20067

————————————————————–

SUMMARY FOR TUESDAY, JUNE 27, 2023

TEMPERATURE (DEGREES F)
MAX…….77 NORMAL…..79
MIN…….65 NORMAL…..61
MEAN……71 NORMAL…..70

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+1
TOTAL DEPARTURE FOR THE MONTH………………..-52 [-2.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH……………99 DEPARTURE…….+35
TOTAL HEATING UNITS FOR THE SEASON…………5295 DEPARTURE……-914
TOTAL HEATING UNITS LAST SEASON TO DATE…….5610 DEPARTURE……-315

COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….6 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………74 DEPARTURE…….-19
TOTAL COOLING UNITS FOR THE SEASON………….105 DEPARTURE…….-16
TOTAL COOLING UNITS LAST SEASON TO DATE……..138 DEPARTURE…….-33

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)……….E38 SSW @ 05:15 P.M.
VECTOR #1 (1-Sec)……….39 SSW @ 05:15 P.M.
VECTOR #2 (1-Sec)……….37 SSW @ 05:15 P.M.
DAVIS #1……………….40 S @ 05:14 P.M.
DAVIS #2 ………………41 S @ 04:56 P.M.
RMY #1 (Instantaneous)…..39 SSW @ 05:15 P.M.
RMY #2 (Instantaneous)…..38 SSW @ 05:15 P.M.
MERLIN…………………35 S
RICHARDS (C5C) (Inst)……37 @ 05:15 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 SW @ 05:19 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..25 @ 05:16 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28 @ 05:16 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………26 S @ 05:20 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 S @ 05:16 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..24 SSW @ 05:16 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 SSW @ 05:16 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………24 @ 05:16 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………..15.3 SSW [368 total miles] VECTOR #1…………………15.1
VECTOR #2…………………16.3
DAVIS #1………………….14.6 S
DAVIS #2………………….16.5 S
RMY #1……………………14.6 S
RMY #2……………………16.4 S
RICHARDS (C5C)…………….14.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.17 DEPARTURE…..+0.04
TOTAL PRECIPITATION FOR THE MONTH…………..4.32 DEPARTURE…..+0.08
TOTAL PRECIPITATION FOR THE YEAR…………..25.07 DEPARTURE…..-1.77

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

6/1 88/56/72/+10/0.00/859/95 21 WSW VEC1 21 WSW RMY 21
6/2 91/53/72/+10/0.53/634/70 37 ENE VEC1 39 ENE RMY 37 TSTM
6/3 53/43/48/-14/0.16/000/00 36 NE VEC1 38 NE RMY 36
6/4 52/43/48/-15/0.17/009/01 30 N VEC1 32 N RMY 29
6/5 58/47/53/-10/0.08/027/03 22 N VEC1 24 N RMY 23
6/6 72/50/61/-2/T/582/64 31 NNW VEC1 31 NNW RMY 26 TSTM
6/7 65/50/58/-6/0.00/301/33 28 NW VEC1 29 NW RMY 29
6/8 64/51/58/-6/T/191/21 13 WNW VEC1 13 WNW RMY 10
6/9 64/49/57/-7/0.47/210/23 20 WNW VEC1 21 ESE RMY 20 TSTM
6/10 67/51/59/-6/0.05/365/40 26 WNW VEC1 26 WNW RMY 26 TSTM
6/11 80/55/68/+3/0.00/823/90 23 S VEC1 24 S RMY 24
6/12 79/60/70/+5/0.15/439/48 32 SSE VEC1 33 SSE RMY 31
6/13 78/59/69/+3/0.03/421/46 26 SE VEC1 27 SE RMY 24
6/14 78/57/68/+2/0.06/448/49 38 S VEC1 39 S RMY 39 TSTM
6/15 77/56/67/+1/0.00/559/61 23 WNW VEC1 22 WNW RMY 22
6/16 81/61/71/+4/T/513/56 20 W VEC1 19 SSW RMY 19
6/17 64/55/60/-7/1.86/000/00 21 NE VEC1 21 NE RMY 21
6/18 70/56/63/-4/0.05/321/35 20 WNW VEC1 20 WNW RMY 20
6/19 67/54/61/-7/0.00/284/31 20 SE VEC1 20 SE RMY 18
6/20 71/53/62/-6/T/367/40 20 ESE VEC1 20 ESE RMY 20
6/21 69/53/61/-7/0.00/826/90 20 E VEC1 20 NE RMY 20
6/22 70/58/62/-7/0.01/789/86 22 ENE VEC1 23 NE RMY 22
6/23 80/58/69/+0/0.04/303/33 18 SSW VEC1 19 SSW RMY 19
6/24 77/66/72/+3/0.12/220/24 29 SW VEC1 29 SW RMY 31
6/25 85/67/76/+6/0.00/660/72 21 SSW VEC1 21 S RMY 21 TSTM
6/26 82/66/74/+4/T/385/42 23 S VEC1 27 S RMY 25
6/27 77/65/71/+1/0.38/275/30 38 SSW VEC1 39 SSW RMY 39 TSTM