Friday, June 28, 2019

| June 28, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 28, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

ABUNDANT SUNSHINE WITH DECENT VISIBILITY
AND LIGHT WINDS….

We observed a visibility of 70 miles on average throughout
the day. An offshore fog was seen this morning, decreasing
visibility to the north and east by 60 miles. Wind has been
light, shifting from north to west following the 1 P.M.
observation. The highest gust so far is 15 mph, with an
average speed around 6 mph. Fair weather today has led to
some significant surface heating, bringing temperatures
above seasonal averages. The high so far today is 87F,
8 degrees above the daily normal of 79F. The low since
midnight is 64F, 3 degrees above the daily normal minimum
of 61F.

Today’s Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 70F; Dew Point: 62F; Wind: NW at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.14 ins. Hg, falling then rising
Visibility: 70 miles due to a thin smoke layer, and 10
miles N-SE due to offshore fog
6-hr Max temp: 70F
6-hr Min temp: 64F
24-hr Precip: 0.00 ins.
BHO SA 1155 250 SCT 70 208/70/62/3303/014/ THN K LYR
ALQDS DSNT FG OFFSHR VSBY 10 N-SE WND L/V/ 8/002 53010
10070 20064

10 A.M.
Weather: Broken cirrus
Temperature: 82F; Dew Point: 60F; Wind: N at 6 kts,
Wind: Light
Sea-level pressure: 30.16 ins. Hg, rising steadily
Visibility: 65 miles, thin smoke layer
3-hr Precip: 0.00 ins.
BHO SA 1455 E250 BKN 65 212/82/60/3506/016/ THN K
LYR ALQDS WND LGT/ 8/002 51004

1 P.M.
Weather: Scattered cumulus, broken cirrus
Temperature: 87F; Dew Point: 62F; Wind: N at 5 kts,
Wind: Light
Sea-level pressure: 30.10 ins. Hg, falling steadily
Visibility: 75 miles
6-hr Max temp: 87F
6-hr Min temp: 70F
6-hr Precip: 0.00 ins.
BHO SA 1755 70 SCT E250 BKN 75 198/87/62/0105/010/
WND LGT/ 8/202 58014 10087 20070

SUMMARY FOR THURSDAY, JUNE 27, 2019

TEMPERATURE (DEGREES F)
MAX…..81   NORMAL…..78
MIN…..57   NORMAL…..60
MEAN….69   NORMAL…..69

DEPARTURE FROM 30-YEAR NORMAL…………………..0
TOTAL DEPARTURE FOR THE MONTH………………….+5 [+0.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE………-1
TOTAL HEATING UNITS FOR THE MONTH…………..33   DEPARTURE……..-38
TOTAL HEATING UNITS FOR THE SEASON………..6252   DEPARTURE…….-122
TOTAL HEATING UNITS LAST SEASON TO DATE……5916   DIFFERENCE……+336

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………4   DEPARTURE……….0
TOTAL COOLING UNITS FOR THE MONTH…………..60   DEPARTURE……..-28
TOTAL COOLING UNITS FOR THE SEASON………….68   DEPARTURE……..-44
TOTAL COOLING UNITS LAST SEASON TO DATE…….130   DEPARTURE……..-62

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 NE  AT  1:40 A.M.
AERO…………………….18 NE  AT  1:40 A.M.
ASOS…………………….20 NE  AT  2:11 A.M.
DAVIS……………………20 NE  AT  1:42 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….14 NE  AT  1:46 A.M
MAXIMUM 2-MINUTE ASOS AVERAGE……………….14 NE  AT  1:46 A.M
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 ENE AT  1:44 A.M
AVERAGE WIND SPEED AND DIRECTION…………..6.0 NE
ASOS…………………..6.9
DAVIS………………….6.9 SE [118 deg.]
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……….3.48  DEPARTURE……-0.32
ASOS…………..3.46
TOTAL PRECIPITATION FOR THE YEAR……….29.27  DEPARTURE……+2.81
ASOS………….29.19

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 71/54/63/+1/0.00/551/61               21 E   AERO 20 E   RMY 18
06/02 75/51/63/+1/…./417/46               23 S   AERO 21 S   RMY N/A
06/03 69/50/60/-2/…./753/83               41 W   AERO 39 W   RMY 43
06/04 70/45/58/-5/0.00/717/79               29 W   AERO 23 W   RMY N/A
06/05 81/57/69/+6/…./527/58               33 SSW AERO 33 SSW RMY N/A
06/06 75/64/70/+6/…./428/47               28 SSW AERO 28 SSW RMY N/A
06/07 80/59/70/+6/0.00/692/76               23 S   AERO 23 S   RMY 22
06/08 78/57/68/+4/0.00/885/97               23 ENE AERO 21 SW  RMY 21
06/09 78/55/67/+3/0.00/840/92               22 S   AERO 21 S   RMY 21
06/10 79/54/67/+2/…./712/78               26 SSE AERO 25 SSE RMY 33
06/11 73/58/66/+1/…./247/27               32 NW  AERO 30 NW  RMY 35
06/12 75/52/64/-1/…./869/95               25 SSW AERO 25 S   RMY 28
06/13 55/49/52/-13/…./…/..              36 NE  AERO 35 NE  RMY 35
06/14 72/50/61/-5/0.00/…/..               38 W   AERO 39 W   RMY 38
06/15 79/54/67/+1/0.00/…/..               38 SSW AERO 41 SSW RMY 40
06/16 70/62/66/0/…./…/..                32 SW  AERO 35 SW  RMY N/A
06/17 74/62/68/+1/…./…/..               12 SSE AERO 18 NW  RMY 17
06/18 71/62/67/0/…./…/..                17*S   AERO 17 S   RMY 16
06/19 74/61/68/+1/…./…/..               16 SSE AERO 20 SSE RMY 19
06/20 69/61/65/-3/…./…/..               26 S   AERO 26 S   RMY 29
06/21 68/58/63/-5/…./…/..               32 NW  AERO 28 NW  RMY 33
06/22 77/56/67/-1/…./…/..               33 NW  AERO 32 NW  RMY 35
06/23 82/59/71/+3/…./…/..               30 NW  AERO 25 WNW RMY 29
06/24 84/61/73/+4/…./…/..               22 NW  AERO 21 NW  RMY 22
06/25 73/61/67/-2/0.18/…/..               35 S   AERO 37 S   RMY 37
06/26 77/64/71/+2/0.00/…/..               12 ENE AERO 18 SE  RMY N/A
06/27 81/57/69/0/0.00/…/..                21 NE  AERO 18 NE  RMY N/A

06/28 Low temp since midnight is 64F; normal low is 61F

*Estimated

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

RECORDS FOR JUNE 28
HIGH 95F IN 1991
LOW 47F IN 1970
PRECIP 2.09 INS IN 1938
PEAK GUST 52 MPH WSW IN 1993

RECORDS FOR JUNE 29
HIGH 93F IN 1933
LOW 42F IN 1919
PRECIP 1.60 INS IN 1889
PEAK GUST 49 MPH S IN 1957

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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