Saturday, June 20, 2020

| June 22, 2020 | Reply

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

SATURDAY, JUNE 20, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

HOT WITH INCREASING CLOUDS AND A
SOUTHWESTERLY WIND….

Today we experienced abundant sunshine in
the morning, with skies becoming mostly
cloudy in the afternoon hours. Visibility
was 65 miles on average due to a distant
haze. A distant cumulonimbus cloud was
seen to the northwest at the 10 P.M.
observation, later seen to be a
thunderstorm near Laconia, NH.

Great Blue Hill is officially in an abnormally
dry pattern. The on-going drought places us at
1.10 inches below the monthly normal, yet nearly
4 inches below the average for the year! There
does not appear to be any notable rainmakers over
the next several days. -Andrew Swanson

The high so far today is 89 degrees, this
is 13 degrees above the daily normal high
of 76F. The low since midnight is 65F,
which is 7 degrees above the daily normal
low of 58F.

Today’s Observations:

7 A.M.
Weather: Broken cirrus, few cumulus
Temperature: 72F; Dew Point: 65F; Relative Humidity: 79%
Wind: W at 7 kts
Sea-level pressure: 30.05 ins. Hg: rising unsteadily
Visibility: 70 miles
6-hr Max temp: 72F
6-hr Min temp: 65F
24-hr Precip:  0.00 ins
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E250 BKN 70 175/72/65/2607/005/ FEW CU ALQDS/
8/102 52001 10072 20065

10 A.M.
Weather: Scattered cumulus, broken cirrus, with a
distant cumulonimbus cloud to the northwest
Temperature: 84F; Dew Point: 65F; Relative Humidity: 54%
Wind: SW at 7 kts
Sea-level pressure: 30.06 ins. Hg: steady, then rising
Visibility: 60 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 50 SCT E250 BKN 60 179/84/65/2207/006/ DSNT CB
NW/ 8/202 51004

1 P.M.
Weather: Broken cumulus and cirrus
Temperature: 88F; Dew Point: 64F; Relative Humidity: 45%
Wind: WSW at 9 kts
Sea-level pressure: 30.02 ins. Hg: falling, then more rapidly
Visibility: 65 miles
6-hr Max temp: 89F
6-hr Min temp: 72F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E50 BKN 250 BKN 65 166/88/64/2509/002/ 8/202 58013
10089 20072

SUMMARY FOR FRIDAY, JUNE 19, 2020

TEMPERATURE (DEGREES F)
MAX…..86   NORMAL…..76
MIN…..66   NORMAL…..58
MEAN….76   NORMAL…..67

DEPARTURE FROM 30-YEAR NORMAL………………+9
TOTAL DEPARTURE FOR THE MONTH……………..+33 [+1.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……. -2
TOTAL HEATING UNITS FOR THE MONTH……………40  DEPARTURE…….-22
TOTAL HEATING UNITS FOR THE SEASON…………5852  DEPARTURE……-513
TOTAL HEATING UNITS LAST SEASON TO DATE…….6252  DEPARTURE……-400

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………11  DEPARTURE……. +7
TOTAL COOLING UNITS FOR THE MONTH……………64  DEPARTURE…….+13
TOTAL COOLING UNITS FOR THE SEASON…………..96  DEPARTURE…….+21
TOTAL COOLING UNITS LAST SEASON TO DATE………40  DEPARTURE…….+56

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..22 S   AT  6:28 P.M.
AERO…………………….22 S   AT  6:28 P.M.
ASOS…………………….22 S   AT  6:30 P.M.
DAVIS……………………23 S   AT  5:09 P.M. RMY 21
FASTEST MILE FOR YESTERDAY………………….17 S   AT  5:12 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 S   AT  6:04 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………16 S   AT  5:11 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.3 SW
ASOS…………………..11.6
DAVIS………………….11.1 SW [227 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……-1.10
ASOS…………..1.91
TOTAL PRECIPITATION FOR THE YEAR……….21.70  DEPARTURE……-3.97
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  78/57/68/+1/0.00/…/..             20 S    AERO 20 S   RMY 20
06/18  86/59/73/+6/0.00/…/..             22 S    AERO 22 SSW RMY 22
06/19 86/66/76/+9/…./…/.. 22 S AERO 22 S RMY 21

06/20 The low since midnight is 65F, the daily normal low is 59F

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

RECORDS FOR JUNE 20
HIGH 94F IN 1953
LOW 41F IN 1918
PRECIP 2.62 INS 1945
PEAK GUST 63 MPH NE IN 1967, SSW IN 2010

RECORDS FOR JUNE 21
HIGH 94F IN 2012
LOW 42F IN 1940
PRECIP 1.40 INS 1903
PEAK GUST 51 MPH SSW IN 2000

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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