Sunday, June 7, 2020

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 7, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

COOL HUMID DAY ATOP GREAT BLUE HILL….

It was a cool humid day on top of the
Great Blue Hill with increasing clouds
into the afternoon hours. 1.14 inches
of rain was observed at the 7 A.M
observation from the thunderstorms that
moved through yesterday afternoon.
Wind was light and southwesterly with
an average speed under 10 mph. Visibility
stayed around 40 miles during the day.
The high so far today is 65 degrees, this
is 8 degrees below the daily normal high
of 73F. The low since midnight is 54F,
which is the same as the daily normal
low of 54F.

Today’s Observations:

7 A.M.
Weather: Broken stratus
Temperature: 56F; Dew Point: 55F; Relative Humidity: 90%
Wind: SW at 9 kts
Sea-level pressure: 29.80 ins. Hg: Increasing, then steady
Visibility: 40 miles
6-hr Max temp: 86F
6-hr Min temp: 54F
24-hr Precip:  1.14 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E40 BKN 45 094/56/55/3309/980/ 8/600 51016 70114
10086 20054

10 A.M.
Weather: Overcast stratus
Temperature: 60F; Dew Point: 55F; Relative Humidity: 73%
Wind: SW at 9 kts
Sea-level pressure: 29.84 ins. Hg: Increasing steadily
Visibility: 35 miles
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E35 OVC 38 106/60/55/3309/984/ 8/6// 52012

1 P.M.
Weather: Broken stratus
Temperature: 63F; Dew Point: 53F; Relative Humidity: 70%
Wind: W at 6 kts
Sea-level pressure: 29.85 ins. Hg: Increasing, then steady
Visibility: 35 miles
6-hr Max temp: 65F
6-hr Min temp: 56F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E35 BKN 39 111/63/53/3606/985/ 8/600 51005 10065
20056

SUMMARY FOR SUNDAY, JUNE 6, 2020

TEMPERATURE (DEGREES F)
MAX…..86   NORMAL…..72
MIN…..57   NORMAL…..54
MEAN….72   NORMAL…..63

DEPARTURE FROM 30-YEAR NORMAL……………..+9
TOTAL DEPARTURE FOR THE MONTH…………….+24 [+3.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH……………18  DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE SEASON…………5830  DEPARTURE……-499
TOTAL HEATING UNITS LAST SEASON TO DATE…….6234  DEPARTURE……-404

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………7   DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………27  DEPARTURE……..16
TOTAL COOLING UNITS FOR THE SEASON…………..59  DEPARTURE…….+24
TOTAL COOLING UNITS LAST SEASON TO DATE………16  DEPARTURE…….+43

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..55 SW AT  2:54 P.M.
AERO…………………….59 SW AT  2:54 P.M.
ASOS…………………….59  W AT  2:54 P.M.
DAVIS……………………57  W AT  2:53 P.M. RMY 59
FASTEST MILE FOR YESTERDAY………………….44 SW AT  2:53 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….40  W AT  2:59 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………44  W AT  2:54 P.M.
AVERAGE WIND SPEED AND DIRECTION……………..10.9 SSW
ASOS……………………..11.4
DAVIS…………………….10.8 SW [236 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….1.14 DEPARTURE…….0.98
ASOS…………..1.12
TOTAL PRECIPITATION FOR THE MONTH……….1.29  DEPARTURE……0.29
ASOS…………..1.27
TOTAL PRECIPITATION FOR THE YEAR……….21.08  DEPARTURE……-2.58
ASOS………….21.58

PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

05/01  64/52/58/+5/…./0.0/000/00         46 SSE  AERO 44 SSE RMY N/A
05/02  70/42/56/+3/…./0.0/729/86         41 NW   AERO 40 NW  RMY N/A
05/03  78/55/67/+14/0.00/0.0/613/72        35 SSW  AERO 35 SSW RMY 36
05/04  72/45/59/+5/T/0.0/247/29            37 NW   AERO 40 WNW RMY 39
05/05  60/40/50/-4/0.00/0.0/821/96         31 NW   AERO 32 NW  RMY N/A
05/06  57/38/48/-6/T/0.0/498/58            24 ESE  AERO 22 ENE RMY 22
05/07  63/37/50/-5/0.00/0.0/576/67         30 WSW  AERO 29 WSW RMY N/A
05/08  57/40/49/-6/…./0.0/328/38         31 W    AERO 32 W   RMY N/A
05/09  44/32/38/-17/…./T/484/56          52 W    AERO 53 W   RMY 54
05/10  59/31/45/-10/0.00/0.0/763/88        46 W    AERO 46 W   RMY 49
05/11  65/43/54/-2/0.22/0.0/322/37         39 S    AERO 43 S   RMY 41
05/12  55/37/46/-10/0.00/0.0/801/92        37 W    AERO 37 W   RMY 37
05/13  59/32/46/-10/0.00/0.0/864/99        37 WNW  AERO 37 WNW RMY 38
05/14  70/40/55/-2/0.00/0.0/831/95         29 W    AERO 26 W   RMY 27
05/15  78/50/64/+7/…./0.0/535/61         40 WSW  AERO 40 WSW RMY 43
05/16  69/47/58/+1/…./0.0/730/83         31 NW   AERO 31 NW  RMY 32
05/17  67/47/57/0/0.00/0.0/132/15          22 SSW  AERO N/A    RMY 21
05/18  60/47/54/-4/T/0.0/053/06            24 W    AERO 22 ENE RMY N/A
05/19  56/45/51/-7/0.00/0.0/797/90         35 ENE  AERO 34 ENE RMY 32
05/20  63/43/53/-5/0.00/0.0/869/98         22 ESE  AERO 20 SE  RMY 19
05/21  76/42/59/0/0.00/0.0/862/97          26 S    AERO 25 S   RMY 25
05/22  82/50/66/+7/0.00/0.0/864/97         29 W    AERO 29 W   RMY 28
05/23  67/44/56/-3/0.02/0.0/187/21         42 ENE  AERO 43 ENE RMY 40
05/24  58/43/51/-8/T/0.0/822/92            27 ENE  AERO 24 ENE RMY N/A
05/25  66/46/56/-4/0.00/0.0/072/08         18 ENE  AERO 18 ENE RMY N/A
05/26  82/56/69/+9/0.00/0.0/215/24         21 S    AERO 21 S   RMY 21
05/27  84/59/72/+12/0.00/0.0/728/81        31 SSW  AERO 31 SSW RMY 31
05/28  77/63/70/+9/…./0.0/027/03         33 SSW  AERO 33 S   RMY 33
05/29  78/66/72/+11/…./…/072/08        41 SSW  AERO 41 SSW RMY 43
05/30  79/63/71/+10/…./…/713/79        30 S    AERO 30 S   RMY N/A
05/31  67/45/56/-5/0.00/0.0/805/89         33 WNW  AERO 33 WNW RMY 32

DAILY RECORDS FOR MAY 2020

5/13/2020: NEW RECORD LOW OF 32F, REPLACING 35F SET IN
1914 AND 2005

PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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/…./…/..             28 W    AERO 27 W   RMY 28
06/03  79/55/67/+5/T/…/..                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/…./…/..            28 SSW  AERO 28 SSW RMY N/A TSTM
06/06  86/57/72/+9/…./…/..             55 SW   AERO 59 SW  RMY 59 TSTM

06/07 The low since midnight is 54F, the daily normal low is 55F

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

RECORDS FOR JUNE 7
HIGH 93F IN 1999
LOW 40F IN 1932
PRECIP 4.01 INS IN 2006
PEAK GUST 58 MPH NE IN 1982

RECORDS FOR JUNE 8
HIGH 94F IN 1984
LOW 37F IN 1932
PRECIP 1.53 INS IN 1947
PEAK GUST 86e MPH WNW IN 1946 [Record for month]

TODAY’S REPORT PREPARED BY: Nicholas Rousseau