Monday, June 22, 2020

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

MONDAY, JUNE 22, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

NOT AS WARM, BUT STILL HUMID WITH AN ONSHORE FLOW TODAY….

Isolated thunderstorms developed yesterday along a
sea breeze boundary. Blue Hill was lucky enough to
get into one of them. This storm brought a period
of downpours which measured 0.83″ both in the ASOS
and standard rain gauges. A modest wind gust to 33
mph also occurred as the outflow boundary of the storm
pushed through. This gust was quite the anomaly for
the day compared to how light winds were outside of
this storm. The average speed for the day was only
7.5 mph!

Today began with dense fog and a touch of drizzle
this morning. By around 11 A.M the fog lifted and
the stratus deck opened up allowing warm sunshine to
finally come out. Temperatures quickly responded,
rising from the mid 60s into the low to mid 70s.
However this is still considerably cooler than the
90 degree temperatures we’ve recorded over the last
2 weekend days.

Despite the dose of rain yesterday, we are still
officially in an abnormally dry pattern. Our monthly
deficit improved some, but we’re still 0.52″ below
normal. For the year we’re still 3.39″ below normal!

The high so far today is 75 degrees, this is 2 degrees
below the daily normal high of 77F. The low since
midnight is 65F, which is 6 degrees above the daily
normal low of 59F.

Today’s Observations:

7 A.M.
Weather: Vertical visibility 200 feet, sky obscured
Temperature: 66F; Dew Point: 66F; Relative Humidity: 100%
Wind: NE at 4 kts, wind light
Sea-level pressure: 30.00 ins. Hg: rising, then more slowly
Visibility: 1/4 mile, fog
6-hr Max temp: 66F
6-hr Min temp: 65F
24-hr Precip: 0.83 ins
24-hr Frozen: 0.0 ins.
BHO SA 1155 W2 X 1/4F 160/66/66/0404/000/ WND LGT/ 8////
51006 70083 10066 20065

10 A.M.
Weather: Vertical visibility 200 feet, sky obscured,
light drizzle
Temperature: 66F; Dew Point: 64F; Relative Humidity: 93%
Wind: ENE at 7 kts
Sea-level pressure: 30.03 ins. Hg: rising, then more rapidly
Visibility: 1/2 mile, fog
3-hr Precip: Trace
3-hr Frozen: 0.0 ins.
BHO SA 1455 W2 X 1/2L-F 168/66/64/0607/003/ OCCL L-
PCPN VRY LGT/ 8//// 53008 6000

1 P.M.
Weather: Scattered Stratocumulus/Cumulus, broken altocumulus,
broken cirrus, cumulonimbus distant SW and WNW-NW
Temperature: 74F; Dew Point: 65F; Relative Humidity: 74%
Wind: E at 5 kts, light and variable
Sea-level pressure: 30.00 ins. Hg: falling, then more rapidly
Visibility: 30 miles, 20 NE 15 E, hazy
6-hr Max temp: 75F
6-hr Min temp: 65F
6-hr Precip: Trace
6-hr Frozen: 0.0 ins.
BHO SA 1755 15 SCT E130 BKN 250 BKN 30 159/74/65/0805/000/
CB DSNT SW AND WNW-NW F BNK OFFSHR NE-E VSBY NE 20 E 15
HAZY WND L/V/ 8/372 58009 6000 10075 20065

SUMMARY FOR SUNDAY, JUNE 21, 2020

TEMPERATURE (DEGREES F)
MAX…..90 NORMAL…..77
MIN…..66 NORMAL…..59
MEAN….78 NORMAL…..68

DEPARTURE FROM 30-YEAR NORMAL……………..+10
TOTAL DEPARTURE FOR THE MONTH……………..+53 [+2.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……. -1
TOTAL HEATING UNITS FOR THE MONTH……………40 DEPARTURE…….-25
TOTAL HEATING UNITS FOR THE SEASON…………5852 DEPARTURE……-516
TOTAL HEATING UNITS LAST SEASON TO DATE…….6254 DEPARTURE……-402

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………13 DEPARTURE……. +9
TOTAL COOLING UNITS FOR THE MONTH……………90 DEPARTURE…….+31
TOTAL COOLING UNITS FOR THE SEASON………….122 DEPARTURE…….+39
TOTAL COOLING UNITS LAST SEASON TO DATE………40 DEPARTURE…….+82

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..33 ESE AT 3:06 P.M.
AERO…………………….35 ESE AT 3:06 P.M.
ASOS…………………….34 ESE AT 3:06 P.M.
DAVIS……………………32 ESE AT 3:28 P.M. RMY 33
FASTEST MILE FOR YESTERDAY………………….25 ESE AT 3:08 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….24 ESE AT 3:06 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………25 ESE AT 3:06 P.M.
AVERAGE WIND SPEED AND DIRECTION……………7.5 SW
ASOS………………….. 7.6
DAVIS…………………. 7.8 SSW [197 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.83 DEPARTURE……+0.71
ASOS…………..0.83
TOTAL PRECIPITATION FOR THE MONTH……….2.74 DEPARTURE……-0.52
ASOS…………..2.74
TOTAL PRECIPITATION FOR THE YEAR……….22.53 DEPARTURE……-3.39
ASOS………….23.05

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 64/42/53/-9/T/0.0/…/.. 28 WNW AERO 29 WNW RMY 28
06/02 72/45/59/-3/…./0.0/…/.. 28 W AERO 27 W RMY 28
06/03 79/55/67/+5/T/0.0/…/.. 29 W AERO 28 W RMY 26
06/04 87/62/75/+12/…./0.0/…/.. 26 W AERO 25 S RMY N/A
06/05 80/65/73/+10/…./0.0/…/.. 28 SSW AERO 28 SSW RMY N/A TSTM
06/06 86/57/72/+9/…./0.0/…/.. 55 SW AERO 59 SW RMY 59 TSTM
06/07 68/54/61/-3/0.00/0.0/…/.. 24 NW AERO 24 NW RMY N/A
06/08 77/51/64/0/0.00/0.0/…/.. 25 W AERO 24 W RMY 25
06/09 77/60/69/+5/T/0.0/…/.. 23 E AERO 21 E RMY N/A
06/10 70/58/64/-1/T/0.0/…/.. 25 E AERO 24 E RMY N/A
06/11 71/64/68/+3/0.62/0.0/…/.. 40 S AERO 40 S RMY 42
06/12 82/63/73/+8/0.00/0.0/…/.. 26 W AERO 25 W RMY 27
06/13 71/53/62/-3/0.00/0.0/…/.. 21 WNW AERO 20 WNW RMY N/A
06/14 67/49/58/-8/0.00/0.0/…/.. 21 E AERO 21 ENE RMY 21
06/15 67/53/60/-6/5/0/0.0/…/.. 21 NE AERO 16 ENE RMY 20
06/16 73/54/64/-2/0.00/0.0/…/.. 18 E AERO 18 E RMY 18
06/17 78/57/68/+1/0.00/0.0/…/.. 20 S AERO 20 S RMY 20
06/18 86/59/73/+6/0.00/0.0/…/.. 22 S AERO 22 SSW RMY 22
06/19 86/66/76/+9/0.00/0.0/…/.. 22 S AERO 22 S RMY 21
06/20 90/65/78/+10/0.00/0.0/…/.. 22 S AERO 21 S RMY 21
06/21 90/66/78/+10/0.83/0.0/…/.. 33 ESE AERO 35 ESE RMY 33 TSTM