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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JUNE 6, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

PASSING STORM IN THE AFTERNOON LEFT SOME
MUCH NEEDED RAIN ATOP GREAT BLUE HILL....

Today started off pretty conventional for 
a humid early summers' day. there was fog in 
the early morning and hazy conditions as the 
the day went on, leaving us with 25 miles of 
visibility at most. An approaching line of
storms made the day much more interesting,
occurring between 2:30 P.M. and 3:30 P.M.
Multiple lightning strikes and flashes were
witnessed before and throughout this time, 
as well as heavy rainfall. While hail was
reported in areas north and west of the
observatory, there was no hail seen here.
Wind maxed out at around 60 mph, with rain
amounting to over an inch for just that one
hour. After the storm, we were left with a 
much better visibility of 70 miles, and a 
light rain still falling. 

The rain deficit as of this morning was 0.68 
inches, with an annual deficit 3.55 inches below
the normal amount.   

The high so far today is 85 degrees, this is 13
degrees above the daily normal high of 72F. The 
low since midnight is 66F, which is 12 degrees 
above the daily normal low of 54F.


Today's Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 67F; Dew Point: 67F; Relative Humidity: 100%
Wind: SSW at 10 kts   
Sea-level pressure: 29.78 ins. Hg: falling steadily
Visibility: 10 miles, fog
6-hr Max temp: 67F
6-hr Min temp: 66F
24-hr Precip:  0.01 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E20 OVC 10 086/67/67/2010/978/ THN FG ALQDS/ 
8/6// 58003 10067 20066

10 A.M.
Weather: Scattered cumulus, broken cirrostratus
Temperature: 76F; Dew Point: 69F; Relative Humidity: 79%
Wind: SW at 9G16 kts
Sea-level pressure: 29.73 ins. Hg: falling
Visibility: 25 miles, hazy
3-hr Precip:  0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 20 SCT 250 BKN 25 072/76/69/2309G16/973/ HAZY/ 
8/102 58014 

1 P.M.
Weather: Broken cumulus, building to the west, broken
cirrostratus
Temperature: 85F; Dew Point: 68F; Relative Humidity: 57%
Wind: SW at 8 kts
Sea-level pressure: 29.65 ins. Hg: falling, then more rapidly
Visibility: 25 miles, hazy
6-hr Max temp: 85F
6-hr Min temp: 67F
6-hr Precip:  0.00 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 55 SCT 250 BKN 25 046/85/68/2208/965/ HAZY/ 8/208 
58026 10085 20067


SUMMARY FOR FRIDAY, JUNE 5, 2020 

TEMPERATURE (DEGREES F)
MAX.....80   NORMAL.....72
MIN.....65   NORMAL.....54
MEAN....73   NORMAL.....63

DEPARTURE FROM 30-YEAR NORMAL.................+10
TOTAL DEPARTURE FOR THE MONTH.................+15 [+2.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE........-4
TOTAL HEATING UNITS FOR THE MONTH...............18  DEPARTURE........-4
TOTAL HEATING UNITS FOR THE SEASON............5830  DEPARTURE......-495
TOTAL HEATING UNITS LAST SEASON TO DATE.......6234  DEPARTURE......-404

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............8   DEPARTURE........+6
TOTAL COOLING UNITS FOR THE MONTH...............20  DEPARTURE........11
TOTAL COOLING UNITS FOR THE SEASON..............52  DEPARTURE.......+19
TOTAL COOLING UNITS LAST SEASON TO DATE.........12  DEPARTURE.......+40

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................28 SSW AT  3:35 A.M.  
                   AERO.........................28 SSW AT  3:35 A.M.  
                   ASOS.........................28 SSW AT  3:35 A.M. 
                   DAVIS........................28 SW  AT  3:33 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................22 SSW AT  3:36 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................22 SSW AT  3:36 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................22 SSW AT  3:35 A.M.
AVERAGE WIND SPEED AND DIRECTION.................11.9 SSW               
                   ASOS..........................12.3
                   DAVIS.........................11.4 SW [214 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01 DEPARTURE.......-0.16
                         ASOS..............0.01
TOTAL PRECIPITATION FOR THE MONTH..........0.15  DEPARTURE......-0.68
                         ASOS..............0.15
TOTAL PRECIPITATION FOR THE YEAR..........19.94  DEPARTURE......-3.55
                         ASOS.............20.46


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 The low since midnight is 66F, the daily normal low is 54F

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

RECORDS FOR JUNE 6
HIGH 95F IN 1925
LOW 42F IN 1885, 1894, 1920, 1945
PRECIP 3.61 INS IN 2000
PEAK GUST 58 MPH NE IN 2000

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

TODAY'S REPORT PREPARED BY: Benjamin Turner