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

FRIDAY, JUNE 26, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

A TRANQUIL MORNING GIVES WAY TO AFTERNOON DISTANT
THUNDERSTORMS...

Mild, dry, and sunny conditions ruled for the majority
of the morning. Dew points remained in the upper-50s
to low-60s, though as the early afternoon approached
dew points nudged up a few degrees. With a boundary
layer approaching from the southeast, sunshine gave
way to developing cumulus. Amidst the 1PM observation,
moderate to towering cumulus were observed to our southeast
with a notable cumulonimbus/thunderstorm cell embedded in
that direction. Winds have been fairly gentle for most
of the day, though reaching 23 MPH as the outflow from
that thunderstorm cell passed through.

We continue to return to the nearly 4 inch precipitation
deficient from last week - sitting at 3.87 inches at
the moment.  

The high so far today is 83 degrees, this is 5
degrees above the daily normal high of 78F. The 
low since midnight is 65F, which is 5 degrees
above the daily normal low of 60F.


Today's Observations:

7 A.M.
Weather: Scattered Cirrus/Cirrostratus (few altocumulus SW-NW)
Temperature: 70F; Dew Point: 60F; Relative Humidity: 70%
Wind: WSW at 8 kts
Sea-level pressure: 29.95 ins. Hg: Rising, then falling
Visibility: 70 miles
6-hr Max temp: 70F
6-hr Min temp: 65F
24-hr Precip: 0.0
24-hr Frozen: 0.0 ins.
BHO SA 1155 250 SCT 70 141/70/60/2408/995/ FEW AC SW-NW/ 8/035
58001 10070 20065

10 A.M.
Weather: Scattered Altocumulus (SW-N); Scattered Cirrus/Cirrostratus (E-S);
few cumulus 
Temperature: 79F; Dew Point: 59F; Relative Humidity: 51%
Wind: WSW at 9 kts
Sea-level pressure: 29.93 ins. Hg: Steady, then falling
Visibility: 65 miles
3-hr Precip:  0.00 ins.
3-hr Frozen:   0.0 ins.
BHO SA 1455 140 SCT 250 SCT 65 137/79/59/2409/993/ SCT AC SW-N
SCT CI/CS E-S FEW CU ALQDS/ 8/135 58004

1 P.M.
Weather: Broken Cumulus; few moderate cumulus (SE-S), few
towering cumulus (SE-S), cumulonimbus (SSE), Virga SE-S
Temperature: 77F; Dew Point: 61F; Relative Humidity: 59%
Wind: SSE at 11G20 kts
Sea-level pressure: 29.88 ins. Hg: Falling, then more slowly
Visibility: 75 miles (3 miles SE-S)
6-hr Max temp: 83F
6-hr Min temp: 70F
6-hr Precip:  0.00 ins.
6-hr Frozen:   0.0 ins.
BHO SA 1755 E50 BKN 75 119/77/61/1611G20/988/ FEW MDT CU SE-S
FEW TCU SE-S CB SSE VSBY SE-S 3 VIRGA SSE/ 8/300 56018 10083 20070


SUMMARY FOR THURSDAY, JUNE 25, 2020 

TEMPERATURE (DEGREES F)
MAX.....84   NORMAL.....78
MIN.....63   NORMAL.....60
MEAN....74   NORMAL.....69

DEPARTURE FROM 30-YEAR NORMAL................. +5
TOTAL DEPARTURE FOR THE MONTH.................+74 [+2.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE....... -1
TOTAL HEATING UNITS FOR THE MONTH...............40  DEPARTURE.......-30
TOTAL HEATING UNITS FOR THE SEASON............5852  DEPARTURE......-520
TOTAL HEATING UNITS LAST SEASON TO DATE.......6254  DEPARTURE......-402

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY................ 9  DEPARTURE....... +4
TOTAL COOLING UNITS FOR THE MONTH...............125  DEPARTURE.......+48
TOTAL COOLING UNITS FOR THE SEASON..............157  DEPARTURE.......+56
TOTAL COOLING UNITS LAST SEASON TO DATE..........58  DEPARTURE.......+99

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................29 W   AT  2:14 P.M.  
                   AERO.........................29 W   AT  2:12 P.M.  
                   ASOS.........................27 W   AT  2:14 P.M. 
                   DAVIS........................29 W   AT  2:14 P.M RMY 29
FASTEST MILE FOR YESTERDAY......................20 WSW AT  3:15 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................20 W   AT  3:28 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................22 WSW AT  2:27 P.M.
AVERAGE WIND SPEED AND DIRECTION...............9.1 SSW               
                   ASOS....................... 9.7
                   DAVIS...................... 9.3 WSW [252 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..........2.74  DEPARTURE......-1.00
                         ASOS..............2.74
TOTAL PRECIPITATION FOR THE YEAR..........22.53  DEPARTURE......-3.87
                         ASOS.............23.05


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  64/42/53/-9/T/0.0/.../..            28 WNW  AERO 29 WNW RMY 28
06/02  72/45/59/-3/..../0.0/.../..         28 W    AERO 27 W   RMY 28
06/03  79/55/67/+5/T/0.0/.../..            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/..../0.0/.../..        28 SSW  AERO 28 SSW RMY N/A TSTM
06/06  86/57/72/+9/..../0.0/.../..         55 SW   AERO 59 SW  RMY 59  TSTM
06/07  68/54/61/-3/0.00/0.0/.../..         24 NW   AERO 24 NW  RMY N/A
06/08  77/51/64/0/0.00/0.0/.../..          25 W    AERO 24 W   RMY 25
06/09  77/60/69/+5/T/0.0/.../..            23 E    AERO 21 E   RMY N/A
06/10  70/58/64/-1/T/0.0/.../..            25 E    AERO 24 E   RMY N/A
06/11  71/64/68/+3/0.62/0.0/.../..         40 S    AERO 40 S   RMY 42
06/12  82/63/73/+8/0.00/0.0/.../..         26 W    AERO 25 W   RMY 27
06/13  71/53/62/-3/0.00/0.0/.../..         21 WNW  AERO 20 WNW RMY N/A            
06/14  67/49/58/-8/0.00/0.0/.../..         21 E    AERO 21 ENE RMY 21
06/15  67/53/60/-6/5/0/0.0/.../..          21 NE   AERO 16 ENE RMY 20
06/16  73/54/64/-2/0.00/0.0/.../..         18 E    AERO 18 E   RMY 18
06/17  78/57/68/+1/0.00/0.0/.../..         20 S    AERO 20 S   RMY 20
06/18  86/59/73/+6/0.00/0.0/.../..         22 S    AERO 22 SSW RMY 22
06/19  86/66/76/+9/0.00/0.0/.../..         22 S    AERO 22 S   RMY 21
06/20  90/65/78/+10/0.00/0.0/.../..        22 S    AERO 21 S   RMY 21
06/21  90/66/78/+10/0.83/0.0/.../..        33 ESE  AERO 35 ESE RMY 33  TSTM
06/22  77/65/71/+3/0.00/0.0/.../..         15 E    AERO 17 S   RMY 14
06/23  85/65/75/+7/0.00/0.0/.../..         27 S    AERO 24 S   RMY 26
06/24  84/66/75/+6/0.00/0.0/.../..         25 S    AERO 24 S   RMY 25
06/25  84/63/74/+5/0.00/0.0/.../..         29 W    AERO 29 W   RMY 29

06/26  The low since midnight is 65F, the daily normal low is 60F

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

RECORDS FOR JUNE 26
HIGH 96F IN 1952
LOW 45F IN 1986
PRECIP 1.52 INS IN 1945
PEAK GUST 48 MPH N IN 1998

RECORDS FOR JUNE 27
HIGH 93F IN 1999, 2007
LOW 46F IN 1897
PRECIP 1.72 INS IN 1938
PEAK GUST 55e N IN 1945

TODAY'S REPORT PREPARED BY: Andrew Swanson