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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 8, 2018  
ALL TIMES ARE IN EASTERN STANDARD TIME

BEAUTIFUL SPRINGTIME WEATHER TODAY

The low temperature was a crisp 52F here at Blue Hill this morning, but that
cool start has given way to a very nice spring afternoon. The temperature
has steadily climbed to a high so far of 78F, above our average high of 73F.
The feel outside has been pleasant, with low humidity. Winds have been light,
mostly from the west at around 5-10mph. Plenty of sunshine has been observed,
but a number of cumulus clouds have bubbled up this afternoon. A few of these
have blossomed into light showers to our west, but dry weather has prevailed 
so far at the summit. Some higher level clouds have also increased in coverage
this afternoon. Visibility has decreased from 65 miles early this morning to a
hazy 40 miles by the 1PM EST observation.

Yesterday marked our fifth consecutive day of cooler than average
temperatures, the longest such streak since mid-April.  The first week of
June was about three degrees cooler than normal after our unusually warm May.

Today's Observations:

7 A.M.
Weather: Mostly clear, few altocumulus mostly S-NW, few small altocumulus
lenticularis E-SE (dissipating), few cirrus distant SSE-SW
Temperature: 59F; Dew Point: 54F; Wind: WSW at 9 kts
Sea-level pressure: 30.16 ins. Hg, steady then rising
Visibility: 65 miles
6-hr Max temp: 59F
6-hr Min temp: 52F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 65 214/59/54/2509/016/ FEW AC MSTLY S-NW 
FEW SML ACSL E-SE DSPTG FEW CI DSNT SSE-SW/ 8/031 53008 10059 20052

10 A.M.
Weather: Scattered cirrus, few cumulus developing S-WNW, 
few altocumulus WSW-W
Temperature: 72F; Dew Point: 55F; Wind: W at 8 kts
Sea-level pressure: 30.14 ins. Hg, falling
Visibility: 50 miles, distant haze 
3-hr Precip: 0.00 ins. 
BHO SA 1455 250 SCT 50 207/72/55/2608/014/ FEW CU DVLPG S-WNW 
FEW AC WSW-W DSNT HZ/ 8/131 57007

1 P.M.
Weather: Scattered cumulus and moderate cumulus, scattered cirrostratus,
broken cirrus
Temperature: 78F; Dew Point: 55F; Wind: W at 11 kts,
Wind: Direction variable WSW-WNW
Sea-level pressure: 30.11 ins. Hg, falling, then more rapidly
Visibility: 40 miles, distant haze 
6-hr Max temp: 78F
6-hr Min temp: 59F
6-hr precip: 0.00 ins.
BHO SA 1755 50 SCT 200 SCT E250 BKN 40 198/78/55/2711/011/ 
DSNT HZ WND 24V30/ 8/205 58009 10078 20059

SUMMARY FOR THURSDAY, JUNE 7, 2018

TEMPERATURE (DEGREES F)
MAX.....69   NORMAL.....73
MIN.....50   NORMAL.....55
MEAN....60   NORMAL.....64

DEPARTURE FROM 30-YEAR NORMAL.........................-4
TOTAL DEPARTURE FOR THE MONTH........................-20 [-3.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............5   DEPARTURE...........+1
TOTAL HEATING UNITS FOR THE MONTH.............50   DEPARTURE..........+20
TOTAL HEATING UNITS FOR THE SEASON..........5897   DEPARTURE.........-436
TOTAL HEATING UNITS LAST SEASON TO DATE.....5720   DIFFERENCE........+177

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE MONTH...............7   DEPARTURE..........-9
TOTAL COOLING UNITS FOR THE SEASON.............69   DEPARTURE.........+29
TOTAL COOLING UNITS LAST SEASON TO DATE........58   DEPARTURE.........+11

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................25  S  AT  4:26 P.M.*
                   AERO.........................25  S  AT  4:26 P.M.* 
                   ASOS.........................28  S  AT  3:46 P.M.
                   DAVIS........................28  M  AT  3:29 P.M.** RMY 27
FASTEST MILE FOR YESTERDAY......................21  S  AT  4:28 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................21  S  AT  4:29 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..................21  M  AT  4:29 P.M.**
AVERAGE WIND SPEED AND DIRECTION...............11.5 SSW
                   ASOS........................12.5
                   DAVIS.......................11.7
*Last of several occurrences
** Davis direction malfunctioning 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.16
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.01  DEPARTURE......-0.15
                         ASOS..............1.04  
TOTAL PRECIPITATION FOR THE YEAR..........28.33  DEPARTURE......+4.69
                         ASOS.............29.91

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

6/01 78/62/70/+8/T/.../..            21 S   AERO 21 S   RMY N/A
6/02 79/54/67/+5/0.00/.../..         26 ENE AERO 25 ENE RMY 27
6/03 59/45/52/-10/0.00/.../..        28 ENE AERO 25 ENE RMY N/A  
6/04 52/45/49/-14/.../.../..         29 ENE AERO 26 ENE RMY 29
6/05 64/47/56/-7/..../.../..         24 N   AERO 21 N   RMY 23 TSTM  
6/06 66/50/58/-5/0.00/.../..         23 S   AERO 21 S   RMY 22
6/07 69/50/60/-4/0.00/.../..         25 S   AERO 25 S   RMY 27 

6/08 Low temp since midnight is 52F; normal low is now 55F

DAILY RECORDS FOR JUNE 2018

None so far.

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

RECORDS FOR JUNE 8
HIGH 94F IN 1984
LOW 37F IN 1932
PRECIP 1.53 INS IN 1947
PEAK GUST 86e MPH WNW IN 1946 [Record for month]

RECORDS FOR JUNE 9
HIGH 94F IN 2008
LOW 40F IN 1980
PRECIP 2.08 INCHES IN 1931
PEAK GUST 67 MPH NW IN 1973

TODAY'S REPORT PREPARED BY: Jonathan O'Brien