Thursday, June 24, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, JUNE 24, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0408E
SUNSET: 1925E
COMFORTABLY DRY WEATHER CONTINUES WITH EXCELLENT VISIBILITY….
It’s been another very pleasant day here on the summit
of Blue Hill with abundant sunshine mixing with some
decorative cumulus clouds.
With dew points in the upper 40s and low 50s, the air
just feels wonderful. Definitely a bonus for late June.
This dry air is allowing for excellent visibility again
today. 80 miles has been the theme since yesterday!
Winds started off very light this morning, but has since
picked up a bit this afternoon. High pressure was crested
just to the east-northeast of the region this morning, as
such a light easterly wind was observed this morning.
However, as the high slowly pushes to the east, the flow
has gradually veered around to the south-southeast and
has been increasing. These are the early signs of big
changes to come in terms of warmer temperatures and higher
humidity arriving tomorrow.
The high temperature so far today is 76F, this is 2 degrees
below the normal maximum of 78F. The low temperature so
far today is 58F, which is 2 degrees below the normal
minimum of 60F.
Today’s Observations:
7 A.M.
Weather: Clear, few distant cirrus all quadrants
Temperature: 68F; Dew Point: 52F; Relative Humidity: 56%
Wind: E @ 4 kts, wind light
Sea-level pressure: 30.42 in. Hg; rising, then more slowly
Visibility: 80 miles
6-hr Max temp: 68F
6-hr Min temp: 58F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 80 302/68/52/0904/042/ FEW CI DSNT ALQDS
THN K LYR ALNG HRZN ALQDS WND LGT/ 8/001 51016 10068 20058
10 A.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 72F; Dew Point: 45F; Relative Humidity: 38%
Wind: SSE @ 9 kts
Sea-level pressure: 30.44 in Hg; rising steadily
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 50 SCT 250 SCT 80 308/72/45/1509/044/ 8/101 52006
1 P.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 73F, Dew point: 49F; Relative Humidity: 42%
Wind: SSE @ 8 kts
Sea-level pressure: 30.42 in Hg; falling, then steady
Visibility: 80 miles
6-hr Max temp: 76F
6-hr Min temp: 68F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 250 SCT 80 303/73/49/1508/042/ 8/101 56005 10076 20068
SUMMARY FOR WEDNESDAY, JUNE 23, 2021
TEMPERATURE (DEGREES F)
MAX…….73 NORMAL…..77
MIN…….52 NORMAL…..59
MEAN……63 NORMAL…..68
DEPARTURE FROM 30-YEAR (1981-2010) NORMAL……..-5
TOTAL DEPARTURE FOR THE MONTH………………+102 [+4.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL THRU JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………… 2 DEPARTURE…….+1
TOTAL HEATING UNITS FOR THE MONTH……………18 DEPARTURE……-49
TOTAL HEATING UNITS FOR THE SEASON…………5596 DEPARTURE…..-774
TOTAL HEATING UNITS LAST SEASON TO DATE…….5852 DEPARTURE…..-256
COOLING DEGREE DAYS (SEASON JAN THRU DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………… 0 DEPARTURE…….-4
TOTAL COOLING UNITS FOR THE MONTH…………..123 DEPARTURE……+55
TOTAL COOLING UNITS FOR THE SEASON………….152 DEPARTURE……+60
TOTAL COOLING UNITS LAST SEASON TO DATE……..138 DEPARTURE……+14
PEAK WIND GUST (MPH):
420C/Official…………..25 NW @ 12:38 A.M.
AEROVANE (south tower)…..24 NW @ 12:53 A.M.
ASOS…………………..24 NW @ 12:39 A.M.
VECTOR #1………………27 @ 12:55 A.M.
VECTOR #2 (south tower)….26 @ 12:53 A.M.
DAVIS #1……………….24 NW @ 12:38 A.M.
DAVIS #2 (south tower)…..23 WNW @ 10:31 A.M.
RMY……………………26 @ 9:45 A.M.
MERLIN…………………N/A
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 NW @ 12:53 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 WNW @ 10:33 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 @ 12:39 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 NW @ 12:40 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 WNW @ 10:33 A.M.
MAXIMUM 2-MINUTE RMY AVERAGE………………..16 NNW @ 12:39 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…… 8.4 NW [202 total miles] ASOS………………… 8.0
VECTOR #1……………. 9.0
DAVIS #1…………….. 9.0 NW
DAVIS #2…………….. 8.9 NW
RMY…………………. 8.4 NW
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00 DEPARTURE…..-0.11
ASOS………….0.00
TOTAL PRECIPITATION FOR THE MONTH………….2.07 DEPARTURE….-1.43
ASOS………….1.96
TOTAL PRECIPITATION FOR THE YEAR………….22.73 DEPARTURE….-3.43
ASOS………..22.82
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 73/52/63/0.00/…/.. 25 NW AERO 24 NW RMY 26
06/24 The low since midnight is 58F, the daily normal low is 60F
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 24
HIGH 91F IN 1914, 1976, 2013
LOW 40F IN 1932
PRECIP 2.80 INS IN 1929
PEAK GUST 54 MPH WNW IN 2010
RECORDS FOR JUNE 25
HIGH 93F IN 1943, 1980, 2005
LOW 47F IN 1903
PRECIP 1.38 INS IN 2012
PEAK GUST 51 MPH W IN 1960
TODAY’S REPORT PREPARED BY: Matt Douglas
