Sunday, June 27, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, JUNE 27, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0409E
SUNSET: 1925E
WINDY AND TROPICAL-FEELING ATOP GREAT BLUE HILL….
Today we are dealing with high humidity and mostly
cloudy skies. There is a significant breeze from the
southwest that continues to give some relief from a
70 degree dew point. Visibility is limited to 25 miles
at most. Humidity is slightly lower than yesterday, but
temperatures are higher.
Wind speeds are currently 20 mph, with frequent gusts around
30 mph. Building cumulus are seen in the afternoon hours,
which is similar to yesterday.
The high temperature so far today is 83F, this is 5 degrees
above the normal maximum of 78F. The low temperature so
far today is 70F, which is 10 degrees above the normal
minimum of 60F.
Today’s Observations:
7 A.M.
Weather: Overcast stratocumulus
Temperature: 72F; Dew Point: 70F; Relative Humidity: 93%
Wind: SW @ 12G20 kts
Sea-level pressure: 30.19 in. Hg; rising steadily
Visibility: 25 miles, thin fog
6-hr Max temp: 72F
6-hr Min temp: 70F
24-hr Precip: 0.00 ins.
BHO SA 1155 20 OVC 25 224/72/70/2212G20/019/ THN F ALQDS/
8/6// 53008 10072 20070
10 A.M.
Weather: Broken stratocumulus and cirrostratus, some
breaks in overcast
Temperature: 79F; Dew Point: 71F; Relative Humidity: 77%
Wind: SSW @ 12 kts, peak of 31 mph at 9:24 A.M.
Sea-level pressure: 30.17 in Hg; falling unsteadily
Visibility: 25 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 20 BKN 250 BKN 25 219/79/71/2112/017/ HAZY
BINOVC ALQDS PK WND 2327/24/ 8/808 57005
1 P.M.
Weather: Broken cumulus and cirrus, breaks in
overcast
Temperature: 83F, Dew point: 63F; Relative Humidity: 63%
Wind: SW @ 18G25 kts, peak of 37 mph SW at 12:38 P.M.
Sea-level pressure: 30.23 in Hg; falling steadily
Visibility: 30 miles, hazy
6-hr Max temp: 83F
6-hr Min temp: 72F
6-hr Precip: 0.00 ins.
BHO SA 1755 20 BKN 250 BKN 30 210/83/63/2218G25/014/
HAZY BINOVC ALQDS PK WND 2132/38/ 8/202 58009 10083 20072
SUMMARY FOR SATURDAY, JUNE 26, 2021
TEMPERATURE (DEGREES F)
MAX…….81 NORMAL…..78
MIN…….61 NORMAL…..60
MEAN……71 NORMAL…..69
DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……..+2
TOTAL DEPARTURE FOR THE MONTH………………..+97 [+3.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL THRU JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………… 0 DEPARTURE…….-1
TOTAL HEATING UNITS FOR THE MONTH……………19 DEPARTURE……-51
TOTAL HEATING UNITS FOR THE SEASON…………5597 DEPARTURE…..-776
TOTAL HEATING UNITS LAST SEASON TO DATE…….5852 DEPARTURE…..-255
COOLING DEGREE DAYS (SEASON JAN THRU DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………… 6 DEPARTURE…….+1
TOTAL COOLING UNITS FOR THE MONTH…………..131 DEPARTURE……+49
TOTAL COOLING UNITS FOR THE SEASON………….160 DEPARTURE……+54
TOTAL COOLING UNITS LAST SEASON TO DATE……..166 DEPARTURE…….-6
PEAK WIND GUST (MPH):
420C/Official…………..36 SSW @ 8:22 P.M.
AEROVANE (south tower)…..37 SSW @ 1:44 P.M.
ASOS…………………..34 SSW @ 8:22 P.M.
VECTOR #1………………37 @ 1:52 P.M.
VECTOR #2 (south tower)….37 @ 8:21 P.M.
DAVIS #1……………….36 SW @ 8:22 P.M.
DAVIS #2 (south tower)…..35 SSE @ 2:11 P.M.
RMY……………………38 @ 1:46 P.M.
MERLIN…………………34
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………26 SW @ 8:22 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….25 SSW @ 8:23 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..26 @ 8:22 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………26 SW @ 8:23 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………26 SSW @ 8:58 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..26 SW @ 8:20 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……16.1 SSW [387 total miles] ASOS…………………15.6
VECTOR #1…………….15.8
DAVIS #1……………..15.0 SW
DAVIS #2……………..16.0 SSW
RMY………………….15.3 SSW
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00 DEPARTURE…..-0.12
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….2.18 DEPARTURE….-1.68
ASOS………….2.06
TOTAL PRECIPITATION FOR THE YEAR………….22.84 DEPARTURE….-3.68
ASOS………..22.92
PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
06/01 74/50/62/0/0.00/425/47 20 WSW AERO 24 WSW RMY 22
06/02 80/55/68/+6/0.00/553/61 28 S AERO 25 S RMY 28
06/03 73/56/65/+3/0.01/073/08 29 SSW AERO 29 SSW RMY 29
06/04 77/61/69/+6/0.02/054/06 23 SW AERO 25 WSW RMY 25 TSTM
06/05 87/60/74/+11/0.00/801/88 32 SSW AERO 37 SSW RMY 35
06/06 91/69/80/+17/0.00/819/90 30 WSW AERO 31 WSW RMY 32
06/07 92/69/81/+17/0.00/838/92 31 SSW AERO 35 SSW RMY 34
06/08 92/69/81/+17/0.06/456/50 24 WSW AERO 25 WSW RMY 27 TSTM
06/09 88/70/79/+15/0.02/530/58 21 N AERO 23 NNW RMY 23
06/10 70/53/62/-3/0.00/795/87 28 NE AERO 28 NE RMY 28
06/11 70/51/61/-4/0.13/411/45 21 SSE AERO 22 SSE RMY 22
06/12 72/53/63/-2/0.43/430/47 20 WSW AERO 18 WSW RMY 20
06/13 82/56/69/+4/0.00/860/94 26 SSW AERO 29 SSW RMY 29
06/14 65/56/61/-5/0.63/027/03 28 S AERO 30 SSE RMY 29
06/15 77/61/69/+3/T/357/39 18 NE AERO 20 NE RMY 18 TSTM
06/16 73/56/65/-1/0.00/769/84 27 NNW AERO 31 NNW RMY 27
06/17 77/52/65/-2/0.00/880/96 21 WNW AERO 21 NW RMY 23
06/18 82/56/69/+2/T/789/86 26 WSW AERO 28 WSW RMY 30
06/19 86/63/75/+8/0.09/504/55 30 SW AERO 32 SW RMY 32
06/20 85/63/74/+6/0.00/816/89 24 S AERO 25 SSW RMY 25
06/21 83/65/74/+6/0.00/…/.. 37 SSW AERO 39 SSW RMY 39
06/22 84/58/71/+3/0.68/…/.. 30 NW AERO 31 NW RMY 31 TSTM
06/23 73/52/63/-5/0.00/…/.. 25 NW AERO 24 NW RMY 26
06/24 76/58/67/-2/0.00/…/.. 25 SE AERO 24 SE RMY 25
06/25 71/57/64/-5/T/…/.. 23 S AERO 23 S RMY 23
06/26 81/61/71/+2/0.00/…/.. 36 SSW AERO 37 SSW RMY 38
06/27 The low since midnight is 70F, the daily normal low is 61F
RECORDS FOR THE MONTH:
High minimum on the 7th of 69F, beating the old record of
66F set in 1922 and 1953.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JUNE 27
HIGH 93F IN 1999, 2007
LOW 46F IN 1897
PRECIP 1.72 INS IN 1938
PEAK GUST 55e N IN 1945
RECORDS FOR JUNE 28
HIGH 95F IN 1991
LOW 47F IN 1970
PRECIP 3.27 INS IN 2020
PEAK GUST 52 MPH WSW IN 1993
TODAY’S REPORT PREPARED BY: Benjamin Turner
