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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 20, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FOGGY WITH SOME RAIN THIS MORNING AND A 
LIGHT SOUTHEASTERLY WIND....

Overnight rainfall left 0.01 inches in the gauge at 7 A.M.
Since then, we measured another 0.25 inches, with the 
majority of it falling between 7 A.M. and 10 A.M. Fog was
significant throughout the day, limiting visibility to an
1/8th mile on average. A light drizzle persists following 
the 1 P.M. observation. Wind has picked up slightly since
this morning, with a peak gust this afternoon of 17 mph. 
The high so far today is 67F, 9 degrees below the daily 
maximum temperature of 76F. Our low since midnight was 
61F, which is 3 degrees above our normal minimum temperature 
for today of 58F.   


Today's Observations:

7 A.M.
Weather: Fog
Temperature: 63F; Dew Point: 63F; Wind: E at 3 kts,
Wind: Light and variable
Sea-level pressure: 29.73 ins. Hg, falling steadily
Visibility: 1/2 mile, fog
6-hr Max temp: 63F
6-hr Min temp: 61F
24-hr Precip: 0.01 ins.
BHO SA 1155 X W3 1/2F 067/63/63/0903/973/ WND L/V/ 8//// 
70001 56005 10063 20061

10 A.M.
Weather: Rain
Temperature: 64F; Dew Point: 64F; Wind: SE at 7 kts
Sea-level pressure: 29.68 ins. Hg, falling steadily 
Visibility: 1/2 mile, fog
3-hr Precip: 0.22 ins.
BHO SA 1455 X W3 1/2RF 052/64/64/1307/968/ RCTD/ 8//// 
6022/ 58015

1 P.M.
Weather: Light drizzle
Temperature: 67F; Dew Point: 67F; Wind: SSE at 8G17 kts
Sea-level pressure: 29.61 ins. Hg, falling, then more slowly
Visibility: 1/16 mile, fog
6-hr Max temp: 67F
6-hr Min temp: 63F
6-hr Precip: 0.25 ins. 
BHO SA 1755 X W2 1/16L-F 026/67/67/1608G17/961/ L-CTD/ 
8//// 6025/ 58024 10067 20063 


SUMMARY FOR WEDNESDAY, JUNE 19, 2019 

TEMPERATURE (DEGREES F)
MAX.....74   NORMAL.....76
MIN.....61   NORMAL.....58
MEAN....68   NORMAL.....67

DEPARTURE FROM 30-YEAR NORMAL......................+1
TOTAL DEPARTURE FOR THE MONTH......................+7 [+0.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE.........-2
TOTAL HEATING UNITS FOR THE MONTH..............31   DEPARTURE........-31
TOTAL HEATING UNITS FOR THE SEASON...........6250   DEPARTURE.......-115
TOTAL HEATING UNITS LAST SEASON TO DATE......5909   DIFFERENCE......+341

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............3   DEPARTURE.........-1
TOTAL COOLING UNITS FOR THE MONTH..............32   DEPARTURE........-19
TOTAL COOLING UNITS FOR THE SEASON.............40   DEPARTURE........-35
TOTAL COOLING UNITS LAST SEASON TO DATE.......110   DEPARTURE........-70

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................16 SSE AT  5:11 P.M.
                   AERO.........................20 SSE AT  5:07 P.M.
                   ASOS.........................18 S   AT  6:48 P.M.
                   DAVIS........................18 SE  AT  4:26 P.M.  RMY 19
FASTEST MILE FOR YESTERDAY......................13 S   AT  6:02 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................14 S   AT  5:05 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................13 SE  AT  4:28 P.M.
AVERAGE WIND SPEED AND DIRECTION..............5.8 S
                   ASOS.......................6.4
                   DAVIS......................6.2 SE [140 deg.]
 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01  DEPARTURE.......-0.14
                         ASOS..............0.01
TOTAL PRECIPITATION FOR THE MONTH..........2.48  DEPARTURE.......-0.53
                         ASOS..............2.48
TOTAL PRECIPITATION FOR THE YEAR..........28.27  DEPARTURE.......+2.60
                         ASOS.............28.21


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 71/54/63/+1/0.00/.../..               21 E   AERO 20 E   RMY 18
06/02 75/51/63/+1/..../.../..               23 S   AERO 21 S   RMY N/A
06/03 69/50/60/-2/..../.../..               41 W   AERO 39 W   RMY 43
06/04 70/45/58/-5/0.00/.../..               29 W   AERO 23 W   RMY N/A
06/05 81/57/69/+6/..../.../..               33 SSW AERO 33 SSW RMY N/A
06/06 75/64/70/+6/..../.../..               28 SSW AERO 28 SSW RMY N/A
06/07 80/59/70/+6/0.00/.../..               23 S   AERO 23 S   RMY 22
06/08 78/57/68/+4/0.00/.../..               23 ENE AERO 21 SW  RMY 21
06/09 78/55/67/+3/0.00/.../..               22 S   AERO 21 S   RMY 21
06/10 79/54/67/+2/..../.../..               26 SSE AERO 25 SSE RMY 33 
06/11 73/58/66/+1/..../.../..               32 NW  AERO 30 NW  RMY 35
06/12 75/52/64/-1/..../.../..               25 SSW AERO 25 S   RMY 28
06/13 55/49/52/-13/..../.../..              36 NE  AERO 35 NE  RMY 35
06/14 72/50/61/-5/0.00/.../..               38 W   AERO 39 W   RMY 38
06/15 79/54/67/+1/0.00/.../..               38 SSW AERO 41 SSW RMY 40
06/16 70/62/66/0/..../.../..                32 SW  AERO 35 SW  RMY N/A
06/17 74/62/68/+1/..../.../..               12 SSE AERO 18 NW  RMY 17
06/18 71/62/67/0/..../.../..                17*S   AERO 17 S   RMY 16
06/19 74/61/68/+1/..../.../..               16 SSE AERO 20 SSE RMY 19

06/20 Low temp since midnight is 61F; normal low is 59F

*Estimated

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 2.62 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: Benjamin Turner