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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 5, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

INTERMITTENT DRIZZLE ACCOMPANY A MILD AND
MUGGY FRIDAY...

We began the day collecting 0.13 inches of
beneficial overnight rainfall. On and off
periods of drizzle during the morning tacked
on another 0.01 inches by 1 PM. With dew points
in the mid to upper-60s, the air has been
noticeably muggier than yesterday. This has
created a mix bag of distant fog and haze limiting
visibility to an average of 25 miles. Winds
have remained on the light side with most gusts
in the 15-20 MPH range. 

The high so far today is 74 degrees, this is 2
degrees above the daily normal high of 72F. The 
low since midnight is 65F, which is 11 degrees 
above the daily normal low of 54F.


Today's Observations:

7 A.M.
Weather: Overcast Altostratus & Altocumulus; few stratus
fractus SE-SW; Very light drizzle
Temperature: 67F; Dew Point: 64F; Relative Humidity: 92%
Wind: SW at 6 kts   
Sea-level pressure: 29.88 ins. Hg: falling, then rising
Visibility: 35 miles (20 miles SE-SW), distant fog
6-hr Max temp: 67F
6-hr Min temp: 65F
24-hr Precip:  0.13 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E70 OVC 35L- 120/67/64/2206/988/ FEW SF DSNT SE-SW
VSBY 20 MI SE-SW PCPN VRY LGT DSNT FG ALQDS/ 8/72/ 55014 70013 
10067 20065

10 A.M.
Weather: Overcast Stratus, Very light drizzle
Temperature: 67F; Dew Point: 65F; Relative Humidity: 93%
Wind: SSW at 8G18 kts
Sea-level pressure: 29.91 ins. Hg: rising, then falling
Visibility: 20 miles, distant fog
3-hr Precip:  0.01 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E10 OVC 20L- 130/67/65/2008G18/991/ PCPN VRY LGT
DSNT FG ALQDS/ 8/6// 50010 6001

1 P.M.
Weather: Broken Cumulus/Stratocumulus; (thin) Overcast
Cirrostratus
Temperature: 73F; Dew Point: 67F; Relative Humidity: 81%
Wind: SSW at 11G18 kts
Sea-level pressure: 29.89 ins. Hg: falling, then more rapidly
Visibility: 25 miles, hazy
6-hr Max temp: 74F
6-hr Min temp: 65F
6-hr Precip:  0.01 ins.
6-hr Snowfall: 0.0 ins.
BHO SA 1755 E18 BKN E250 –OVC 25 121/73/67/2011G18/989/
SUN DMLY VSBL HAZY/ 8/805 58009 6001 10074 20065


SUMMARY FOR THURSDAY, JUNE 4, 2020 

TEMPERATURE (DEGREES F)
MAX.....87   NORMAL.....72
MIN.....62   NORMAL.....54
MEAN....75   NORMAL.....63

DEPARTURE FROM 30-YEAR NORMAL.................+12
TOTAL DEPARTURE FOR THE MONTH..................+5 [+1.1 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.........0
TOTAL HEATING UNITS FOR THE SEASON............5830  DEPARTURE......-491
TOTAL HEATING UNITS LAST SEASON TO DATE.......6234  DEPARTURE......-404

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............10  DEPARTURE........+8
TOTAL COOLING UNITS FOR THE MONTH...............12  DEPARTURE.........5
TOTAL COOLING UNITS FOR THE SEASON..............44  DEPARTURE.......+13
TOTAL COOLING UNITS LAST SEASON TO DATE..........8  DEPARTURE.......+36

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................26 W   AT 12:28 P.M.  
                   AERO.........................25 S   AT  4:50 P.M.  
                   ASOS.........................26 S   AT  4:51 P.M. 
                   DAVIS........................26 W   AT 12:28 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................18 SSW AT  3:26 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................18 S   AT  3:59 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................18 SSW AT  3:26 P.M.
AVERAGE WIND SPEED AND DIRECTION.................10.0 W               
                   ASOS..........................10.2
                   DAVIS.........................9.9 SW [230 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.13 DEPARTURE.......-0.04
                         ASOS..............0.13
TOTAL PRECIPITATION FOR THE MONTH..........0.14  DEPARTURE......-0.52
                         ASOS..............0.14
TOTAL PRECIPITATION FOR THE YEAR..........19.93  DEPARTURE......-3.39
                         ASOS.............20.45


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/.../..         18 ENE  AERO 18 ENE RMY N/A
05/26  82/56/69/+9/0.00/0.0/.../..         21 S    AERO 21 S   RMY 21
05/27  84/59/72/+12/0.00/0.0/.../..        31 SSW  AERO 31 SSW RMY 31  
05/28  77/63/70/+9/..../0.0/.../..         33 SSW  AERO 33 S   RMY 33
05/29  78/66/72/+11/..../.../.../..        41 SSW  AERO 41 SSW RMY 43
05/30  79/63/71/+10/..../.../.../..        30 S    AERO 30 S   RMY N/A
05/31  67/45/56/-5/0.00/0.0/.../..         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 The low since midnight is 65F, 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 5
HIGH 95F IN 1930
LOW 41F IN 1891
PRECIP 2.83 INS IN 1982
PEAK GUST 57 MPH NNW IN 1988

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

TODAY'S REPORT PREPARED BY: Andrew Swanson