Wednesday, June 17, 2020

| June 17, 2020 | Reply

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

WEDNESDAY, JUNE 17, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER DRY, FAIR WEATHER DAY WITH
LIGHT AND VARIABLE WIND….

We observed mostly clear skies, only seeing
some distant cirrostratus at each observation.
Visibility was 75 miles on average, with the
highest of 80 miles being seen at 1 P.M.
Wind was light and variable, coming mostly
from the east. The highest gust so far today
is only 13 mph.

Great Blue Hill is lacking in the rainfall
department, being 0.67 inches below the
monthly normal. While that quantity seems
small, we are currently 3.54 inches below
the normal amount for the year to date.

The high so far today is 77 degrees, this
is a degree above the daily normal high
of 76F. The low since midnight is 57F,
which is a degree lower than the daily normal
low of 58F.

Today’s Observations:

7 A.M.
Weather: Few cirrostratus
Temperature: 64F; Dew Point: 51F; Relative Humidity: 63%
Wind: NNE at 3 kts, light and variable
Sea-level pressure: 30.33 ins. Hg: steady, then rising
Visibility: 75 miles
6-hr Max temp: 64F
6-hr Min temp: 57F
24-hr Precip:  0.00 ins
24-hr Snowfall: 0.0 ins.
BHO SA 1155 CLR 75 272/64/51/0703/033/ FEW CS ALQDS WND
L/V/ 8/005 53011 10064 20057

10 A.M.
Weather: Few cirrostratus
Temperature: 72F; Dew Point: 52F; Relative Humidity: 49%
Wind: E at 4 kts, light and variable
Sea-level pressure: 30.32 ins. Hg: falling steadily
Visibility: 80 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 CLR 80 270/72/52/0904/032/ FEW CS ALQDS WND
L/V/ 8/005 58002

1 P.M.
Weather: Few cirrostratus
Temperature: 75F; Dew Point: 55F; Relative Humidity: 50%
Wind: NE at 8 kts
Sea-level pressure: 30.27 ins. Hg: falling steadily
Visibility: 75 miles
6-hr Max temp: 77F
6-hr Min temp: 64F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 CLR 75 252/75/55/0608/027/ FEW CS ALQDS/ 8/005
58018 10077 20064

SUMMARY FOR TUESDAY, JUNE 16, 2020

TEMPERATURE (DEGREES F)
MAX…..73   NORMAL…..75
MIN…..54   NORMAL…..57
MEAN….64   NORMAL…..66

DEPARTURE FROM 30-YEAR NORMAL………………-2
TOTAL DEPARTURE FOR THE MONTH……………..+17 [+0.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….1  DEPARTURE……. -1
TOTAL HEATING UNITS FOR THE MONTH……………40  DEPARTURE…….-16
TOTAL HEATING UNITS FOR THE SEASON…………5852  DEPARTURE……-507
TOTAL HEATING UNITS LAST SEASON TO DATE…….6252  DEPARTURE……-400

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………… 0  DEPARTURE……. -2
TOTAL COOLING UNITS FOR THE MONTH……………42  DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE SEASON…………..74  DEPARTURE…….+10
TOTAL COOLING UNITS LAST SEASON TO DATE………32  DEPARTURE…….+42

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..18 E   AT  9:34 A.M.
AERO…………………….18 E   AT  9:32 A.M.
ASOS…………………….19 ENE AT  9:53 A.M.
DAVIS……………………18 E   AT  9:33 A.M. RMY 18
FASTEST MILE FOR YESTERDAY………………….15 E   AT 10:42 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 ENE AT  9:53 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 E   AT 10:39 A.M.
AVERAGE WIND SPEED AND DIRECTION……………8.0 ENE
ASOS……………………8.5
DAVIS…………………..8.8 ENE [64 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.91  DEPARTURE……-0.67
ASOS…………..1.91
TOTAL PRECIPITATION FOR THE YEAR……….21.70  DEPARTURE……-3.54
ASOS………….22.22

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/…/..                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/…/..             26 W    AERO 25 W   RMY 27
06/13  71/53/62/-3/0.00/…/..             21 WNW  AERO 20 WNW RMY N/A
06/14  67/49/58/-8/0.00/…/..             21 E    AERO 21 ENE RMY 21
06/15  67/53/60/-6/5/0/…/..              21 NE   AERO 16 ENE RMY 20
06/16  73/54/64/-2/0.00/…/..             18 E    AERO 18 E   RMY 18

06/17 The low since midnight is 57F, the daily normal low is 58F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR JUNE 17
HIGH 93F IN 1894
LOW 44F IN 1920
PRECIP 2.79 INS 2001 (Sub-Tropical storm ALLISON)
PEAK GUST 55e MPH S IN 1977

RECORDS FOR JUNE 18
HIGH 93F IN 1929,1994
LOW 39F IN 1920
PRECIP 3.36 INS 1998
PEAK GUST 48e MPH W IN 1943

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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