Tuesday, June 27, 2023

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

TUESDAY, JUNE 27, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0409E
SUNSET: 1925E

BELOW NORMAL TEMPERATURES WITH RAIN AND HUMID CONDITIONS…

Today started off similar to yesterday, however, the warm
temperatures did not return by the 10E observation as they
had yesterday. As of the 1pm observation, we are still slightly
below the normal temperature, mostly due to the rain and cloud
cover.

Temperatures were below average for most of the day, though with
the clearing of the stratus clouds and a bit of blue sky we have
seen a quick jump in temperatures at the 1pm observation. With the
dew points in the upper 60’s it feels very sticky, although the
wind is offering a bit of relief.

The wind has been very busy today, with an average speed so far of
around 14mph and winds mostly from the south. The peak gust today
so far occurred this morning before the 8am observation and was
around 36mph.

Visibility has remained between 40-50 miles for most of the day,
even with the rain showers in the late morning hours. The morning
sky had stratus and stratusfractus clouds with some cumulus making
a debut this afternoon.

The maximum temperature so far today is 74F, this is 5 degrees
below the normal high of 79F. The minimum since midnight is 65F,
which is 4 degrees above the normal low of 61F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratus, few stratafracta all quadrants
Temperature: 68F; Dew Point: 67F; Relative Humidity: 100%
Wind: SSE @ 18 kts, peak wind 28 kts @ 06:54E
Sea-level pressure: 1008.7 mb; 29.79 in. Hg: rising, then more
quickly
Visibility: 40 miles
6-hr Max temp: 68F
6-hr Min temp: 65F
24-hr Precip: 0.37 inches
BHO SA 1155 E3 OVC 40 087/68/67/1618/979/ FEW STFRA ALQDS PK WND
1628/54/ 8/620 53008 70040 10068 20065

10 A.M.
Weather: Light rain showers, overcast stratus, few strafracta all
quadrants
Temperature: 68F; Dew Point: 67F; Relative Humidity: 96%
Wind: S @ 9 kts
Sea-level pressure: 1010.1 mb; 29.83 in. Hg: decreasing, then rising
more quickly
Visibility: 40 miles
3-hr Precip: 0.01 inches
BHO SA 1455 E3 OVC 40RW- 101/68/67/1809/983 FEW STFRA ALQDS 8/620
53014 6001/

1 P.M.
Weather: Few cumulus all quadrants, few altocumulus all quadrants
Temperature: 73F; Dew Point: 67F; Relative Humidity: 81%
Wind: S @ 11 kts
Sea-level pressure: 1008.9 mb; 29.79 in. Hg: falling, then more
rapidly
Visibility: 50 miles
6-hr Max temp: 73F
6-hr Min temp: 68F
6-hr Precip: 0.01 inches
BHO SA 1755 E30 BKN 120 BKN 50 089/73/67/1911/979/ 8/250 58012 6001/
10073 20068

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SUMMARY FOR MONDAY, JUNE 26, 2023

TEMPERATURE (DEGREES F)
MAX…….82 NORMAL…..79
MIN…….66 NORMAL…..61
MEAN……74 NORMAL…..70

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+4
TOTAL DEPARTURE FOR THE MONTH………………..-53 [-2.2 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……-913
TOTAL HEATING UNITS LAST SEASON TO DATE…….5607 DEPARTURE……-312

COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….9 DEPARTURE……..+3
TOTAL COOLING UNITS FOR THE MONTH……………68 DEPARTURE…….-19
TOTAL COOLING UNITS FOR THE SEASON…………..99 DEPARTURE…….-16
TOTAL COOLING UNITS LAST SEASON TO DATE……..138 DEPARTURE…….-39

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)……….E23 S @ 04:17 P.M.
VECTOR #1 (1-Sec)……….25 S @ 04:07 P.M.
VECTOR #2 (1-Sec)……….25 S @ 04:15 P.M.
DAVIS #1……………….24 S @ 04:16 P.M.
DAVIS #2 ………………24 S @ 02:35 P.M.
RMY #1 (Instantaneous)…..25 S @ 04:07 P.M.
RMY #2 (Instantaneous)…..26 S @ 04:07 P.M.
MERLIN…………………31 S
RICHARDS (C5C) (Inst)……24 @ 04:07 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 S @ 04:17 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 04:17 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19 @ 04:16 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 S @ 11:46 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 S @ 03:43 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 S @ 04:17 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 SSW @ 04:16 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 @ 04:17 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……….. 9.0 S [217 total miles] VECTOR #1………………… 9.3
VECTOR #2……………….. 10.0
DAVIS #1…………………. 8.6 S
DAVIS #2…………………. 9.1 SSW
RMY #1…………………… 9.1 S
RMY #2……………………10.1 S
RICHARDS (C5C)……………. 9.4

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.37 DEPARTURE…..+0.24
TOTAL PRECIPITATION FOR THE MONTH…………..4.15 DEPARTURE…..+0.04
TOTAL PRECIPITATION FOR THE YEAR…………..24.90 DEPARTURE…..-1.99

————————————————————–

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/…/.. 20 E VEC1 20 NE RMY 20
6/22 70/58/62/-7/0.01/…/.. 22 ENE VEC1 23 NE RMY 22
6/23 80/58/69/+0/0.04/…/.. 18 SSW VEC1 19 SSW RMY 19
6/24 77/66/72/+3/0.12/…/.. 29 SW VEC1 29 SW RMY 31
6/25 85/67/76/+6/0.00/…/.. 21 SSW VEC1 21 S RMY 21 TSTM
6/26 82/66/74/+4/0.37/…/.. 23 S VEC1 27 S RMY 25