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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 7, 2018  
ALL TIMES ARE IN EASTERN STANDARD TIME

DRY CONDITIONS CONTINUE AND CLOUDS INCREASE AFTER
A SUNNY MORNING... 

We had a wind shift yesterday around 2:00 P.M.
from being light and from the north to stronger and
from the S/SSW. Wind continued to be from the SSW 
today and this caused temperatures to be closer to  
seasonable on Great Blue Hill with a high of 69F so 
far today. This is 4 degrees from the daily normal of 
73F. The day began with partly sunny skies but as the
pressure began to decrease we had an increase in cloud 
cover today. 
Humidity was high overnight but has dropped during the
day today. This allowed for visibility to increase from 
40 miles to 60 miles by 10:00 A.M but a lingering distant 
haze obscured visibility back to 40 miles at 1:00 P.M. 
    
Today's Observations:

7 A.M.
Weather: Scattered altocumulus, scattered cirrus, few 
cumulus NE-SW 
Temperature: 56F; Dew Point: 51F; Wind: SSW at 6 kts
Wind: Light
Sea-level pressure: 30.11 ins. Hg, rising, then falling
Visibility: 40 miles, distant haze in all directions 
6-hr Max temp: 56F
6-hr Min temp: 50F
24-hr Precip: 0.00 ins.
BHO SA 1155 80 SCT 250 SCT 40 198/56/51/2006/011/ FEW CU 
DSNT NE-SW DSNT HZ ALQDS WND LGT/ 8/161 50011 10056 20050

10 A.M.
Weather: Scattered stratocumulus/cumulus, scattered 
altocumulus, broken cirrostratus, broken cirrus  
Temperature: 67F; Dew Point: 54F; Wind: S at 10G14 kts
Sea-level pressure: 30.14 ins. Hg, rising, then more slowly
Visibility: 60 miles, distant haze in all directions
3-hr Precip: 0.00 ins. 
BHO SA 1455 45 SCT 90 SCT E200 BKN 250 BKN 60 207/67/54/
1910G14/014/ DSNT HZ ALQDS/ 8/838 51009 

1 P.M.
Weather: Scattered stratocumulus/cumulus, broken 
altocumulus, broken cirrostratus
Temperature: 68F; Dew Point: 54 F; Wind: S at 12G20 kts
Sea-level pressure: 30.11 ins. Hg, decreasing, then more rapidly
Visibility: 40 miles, distant haze in all directions 
6-hr Max temp: 69F
6-hr Min temp: 56F
6-hr precip: 0.00 ins.
BHO SA 1755 25 SCT E80 BKN 250 BKN 40 197/68/54/1912G20/011/
 DSNT HZ ALQDS/ 8/836 58010 10069 20056 

SUMMARY FOR WEDNESDAY, JUNE 6, 2018

TEMPERATURE (DEGREES F)
MAX.....66   NORMAL.....72
MIN.....50   NORMAL.....54
MEAN....58   NORMAL.....63

DEPARTURE FROM 30-YEAR NORMAL.........................-5
TOTAL DEPARTURE FOR THE MONTH........................-23 [-4.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............7   DEPARTURE...........+3
TOTAL HEATING UNITS FOR THE MONTH.............45   DEPARTURE..........+19
TOTAL HEATING UNITS FOR THE SEASON..........5892   DEPARTURE.........-437
TOTAL HEATING UNITS LAST SEASON TO DATE.....5711   DIFFERENCE........+181

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE MONTH...............7   DEPARTURE..........-4
TOTAL COOLING UNITS FOR THE SEASON.............69   DEPARTURE.........+34
TOTAL COOLING UNITS LAST SEASON TO DATE........58   DEPARTURE.........+11

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................23 S AT  9:09 P.M.
                   AERO.........................21 S AT 11:07 P.M. 
                   ASOS.........................23 S AT  9:10 P.M.
                   DAVIS........................23 M AT  8:32 P.M.** RMY 22
FASTEST MILE FOR YESTERDAY......................17 S AT  9:09 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................17 S AT  9:08 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..................17 M AT  8:15 P.M.**
AVERAGE WIND SPEED AND DIRECTION...............6.2 N
                   ASOS........................6.7
                   DAVIS.......................6.2 
** Davis direction malfunctioning 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.17
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.01  DEPARTURE......+0.01
                         ASOS..............1.04  
TOTAL PRECIPITATION FOR THE YEAR..........28.33  DEPARTURE......+4.85
                         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  Low temp since midnight is 50F; normal low is now 54F

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 7
HIGH 93F IN 1999
LOW 40F IN 1932
PRECIP 4.01 INS IN 2006
PEAK GUST 58 MPH NE IN 1982

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]

TODAY'S REPORT PREPARED BY: Kaitlin Geagan/Devin Richardt