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

SUNDAY, JUNE 20, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0407E
SUNSET:  1924E

WARM AND A TAD HUMID WITH A MIX OF SUN AND CLOUDS....

Some rain showers moved through the region last evening
leaving 0.09" of water in the rain gauged, other than
that quiet weather prevails with a rather warm air mass
in place.

While not quite as humid as yesterday, the dew point is
still hanging out around 60 degrees, which makes it
noticable.

The wind has been on the light side for the most part
only averaging around 6mph since 7 A.M. The direction
was variable this morning, but it has finally settled
out of the southwest this afternoon.  

Visibility has been pretty decent for this time of year,
holding at around 65 miles all day!

The high so far today is 83F, which is 7 degrees above
the normal high of 76F. The low since midnight is 63F,
which is 4 degrees above the daily normal low of 59F.


Today's Observations:

7 A.M.
Weather: Clear, few altocumulus all quadrants,
few altocumulus castellanus distant NNE-NE
Temperature: 68F; Dew Point: 63F; Relative Humidity: 84%
Wind: WSW @ 9 kts
Sea-level pressure: 29.81 in. Hg; rising, then more slowly
Visibility: 65 miles
6-hr Max temp: 68F
6-hr Min temp: 63F
24-hr Precip: 0.09 ins.
BHO SA 1155 CLR 65 096/68/63/2509/981/ FEW AC ALQDS
FEW ACC DSNT NNE-NE/ 8/080 51013 70009 10068 20063

10 A.M.
Weather: Thin broken cirrus, few cumulus distant W-N and SE,
few altocumulus castellanus distant SW and distant NE
Temperature: 79F; Dew Point: 62F; Relative Humidity: 57%
Wind: WSW @ 4 kts, wind light and variable
Sea-level pressure: 29.82 in Hg; rising unsteadily
Visibility: 65 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E250 -BKN 65 099/79/62/2504/982/ FEW CU DSNT W-N
AND SE FEW ACC DSNT SW AND DSNT NE WND L/V/ 8/281 52003

1 P.M.
Weather: Thin broken cirrus, few cumulus all quadrants
Temperature: 82F, Dew point: 59F; Relative Humidity: 46%
Wind: SW @ 12G18 kts
Sea-level pressure: 29.79 in Hg; falling, then more rapidly
Visibility: 65 miles
6-hr Max temp: 83F
6-hr Min temp: 68F
6-hr Precip: 0.00 ins.
BHO SA 1755 E250 -BKN 65 088/82/59/2212G18/979/ FEW CU ALQDS/
8/201 58011 10083 20068


SUMMARY FOR SATURDAY, JUNE 19, 2021

TEMPERATURE (DEGREES F)
MAX.......86     NORMAL.....76
MIN.......63     NORMAL.....58
MEAN......75     NORMAL.....67

DEPARTURE FROM 30-YEAR (1981-2010) NORMAL........+8
TOTAL DEPARTURE FOR THE MONTH...................+92 [+4.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL THRU JUN)
TOTAL HEATING UNITS FOR YESTERDAY............... 0  DEPARTURE.......-2
TOTAL HEATING UNITS FOR THE MONTH...............16  DEPARTURE......-46
TOTAL HEATING UNITS FOR THE SEASON............5594  DEPARTURE.....-771
TOTAL HEATING UNITS LAST SEASON TO DATE.......5852  DEPARTURE.....-258

COOLING DEGREE DAYS (SEASON JAN THRU DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............10  DEPARTURE.......+6
TOTAL COOLING UNITS FOR THE MONTH...............99  DEPARTURE......+48
TOTAL COOLING UNITS FOR THE SEASON.............128  DEPARTURE......+53
TOTAL COOLING UNITS LAST SEASON TO DATE.........96  DEPARTURE......+32

PEAK WIND GUST (MPH):
                     420C/Official..............30 SW  @  8:43 P.M.
                     AEROVANE (south tower).....32 SW  @  8:38 P.M.
                     ASOS.......................29 SW  @  8:43 P.M.
                     VECTOR #1..................33     @  8:37 P.M.
                     VECTOR #2 (south tower)....33     @  9:35 P.M.
                     DAVIS #1...................31 SSW @  9:50 P.M.
                     DAVIS #2 (south tower).....31 SSE @  3:05 A.M.
                     RMY........................32     @  9:49 P.M.
                     MERLIN.....................29

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL..................24 SSW @  9:48 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................22 SW  @  8:44 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..............22     @  8:43 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............22 SSW @  9:50 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............23 S   @  9:57 P.M.
MAXIMUM 2-MINUTE RMY AVERAGE....................21 SW  @  8:43 P.M.

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL.....13.3 SSW [320 total miles]
                     ASOS....................13.8
                     VECTOR #1...............13.5
                     DAVIS #1................13.2 WSW
                     DAVIS #2................13.7 SW
                     RMY.....................13.0 SW


PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.09  DEPARTURE....-0.06
                             ASOS.............0.07
TOTAL PRECIPITATION FOR THE MONTH.............1.39  DEPARTURE....-1.62
                             ASOS.............1.32
TOTAL PRECIPITATION FOR THE YEAR.............22.05  DEPARTURE....-3.62
                              ASOS...........22.18

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   74/50/62/0/0.00/425/47            20 WSW  AERO 24 WSW  RMY 22
06/02   80/55/68/+6/0.00/553/61           28 S    AERO 25 S    RMY 28
06/03   73/56/65/+3/0.01/073/08           29 SSW  AERO 29 SSW  RMY 29
06/04   77/61/69/+6/0.02/054/06           23 SW   AERO 25 WSW  RMY 25 TSTM
06/05   87/60/74/+11/0.00/801/88          32 SSW  AERO 37 SSW  RMY 35
06/06   91/69/80/+17/0.00/819/90          30 WSW  AERO 31 WSW  RMY 32
06/07   92/69/81/+17/0.00/838/92          31 SSW  AERO 35 SSW  RMY 34
06/08   92/69/81/+17/0.06/456/50          24 WSW  AERO 25 WSW  RMY 27 TSTM
06/09   88/70/79/+15/0.02/530/58          21 N    AERO 23 NNW  RMY 23
06/10   70/53/62/-3/0.00/795/87           28 NE   AERO 28 NE   RMY 28
06/11   70/51/61/-4/0.13/411/45           21 SSE  AERO 22 SSE  RMY 22
06/12   72/53/63/-2/0.43/430/47           20 WSW  AERO 18 WSW  RMY 20
06/13   82/56/69/+4/0.00/860/94           26 SSW  AERO 29 SSW  RMY 29
06/14   65/56/61/-5/0.63/027/03           28 S    AERO 30 SSE  RMY 29
06/15   77/61/69/+3/T/.../..              18 NE   AERO 20 NE   RMY 18 TSTM
06/16   73/56/65/-1/0.00/.../..           27 NNW  AERO 31 NNW  RMY 27
06/17   77/52/65/-2/0.00/.../..           21 WNW  AERO 21 NW   RMY 23
06/18   82/56/69/+2/T/.../..              26 WSW  AERO 28 WSW  RMY 30
06/19   86/63/75/+8/0.09/.../..           30 SW   AERO 32 SW   RMY 32

06/20 The low since midnight is 63F, the daily normal low is 59F

RECORDS FOR THE MONTH:

High minimum on the 7th of 69F, beating the old record of
66F set in 1922 and 1953.


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 2.61 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: Matt Douglas