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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, NOVEMBER 16, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

SIGNIFICANT SNOWFALL AND WANDERING TEMPERATURES...

Today's observation period was marked by significant 
temperature fluctuation oscillating about the freezing point, 
with overnight temperatures rising above 32F just after
2 A.M. this morning.  The trend continued with temperatures 
rising to 40F by 8 A.M., coupled with the snow of late last night 
transitioning to rainfall in the early hours of the day.  
In total, 6.5 ins. of snow were recorded for the 7 A.M. 
observation, with rain continuing to fall at that time.  
Alongside the steady overnight precipitation, pressure has been largely 
in free fall, with the lowest readings of the month gathered during
today's observations.  After finally bottoming out, the mercury 
appears to be on the rise again at the time of 1 P.M.  Also 
noteworthy has been the transition back to northwesterly winds
throughout the day.  This shift has helped drive temperatures back
down below freezing in time for the afternoon hours.     

Today's Observations:

7 A.M.
Weather: Overcast nimbostratus, light rain, fog
Temperature: 39F; Dew Point: 39F; Wind: E at 26G35 kts,
Peak wind: 35 kts (40 MPH) E at 6:48 A.M.  
Sea-level pressure: 29.53 ins. Hg, falling rapidly      
Visibility: 1 mile
6-hr Max temp: 39F
6-hr Min temp: 30F
24-hr Precip: 1.10 ins.
24-hr snowfall: 6.5 ins.
Snow depth: 7 ins.   
BHO SA 1155 –X E15 OVC 1R-F 000/39/39/0826G35/953/ 
NEW SNW PST 24 HRS 6.5 INS R-CTD PK WND 0935/48/ 8/02/ 
4/007 57072 70110 10039 20030

10 A.M.
Weather: Overcast nimbostratus, light drizzle, fog 
Temperature: 39F; Dew Point: 39F; Wind: N at 18G32 kts, 
Peak wind: 32 kts (37 MPH) N at 9:39 A.M.  
Sea-level pressure: 29.40 ins. Hg, falling steadily 
Visibility: 4 miles
3-hr Precip: 0.30 ins.
3-hr snowfall: 0.0 ins. 
BHO SA 1455 E15 OVC 4L-F 957/39/39/0118G32/940/ 
L-CTD PK WND 0132/39 8/02/ 56043 60030

1 P.M.
Weather: Overcast nimbostratus, light drizzle, fog
Temperature: 31F; Dew Point: 31F; Wind: NW at 16G26 kts, 
Peak wind: 29 kts (33 MPH) WNW at 12:02 P.M. 
Sea-level pressure: 29.53 ins. Hg, rising steadily   
Visibility: 10 miles
6-hr Max temp: 41F
6-hr Min temp: 31F 
6-hr Precip: 0.30 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 3 ins.
BHO SA 1755 E15 OVC 10L-F 999/31/31/3216G26/953/ 
L-CTD PK WND 2929/02 8/02/ 53039 60030 10041 20031
 
SUMMARY FOR THURSDAY, NOVEMBER 15, 2018 

TEMPERATURE (DEGREES F)
MAX.....30   NORMAL.....50
MIN.....19   NORMAL.....34
MEAN....25   NORMAL.....42

DEPARTURE FROM 30-YEAR NORMAL......................-17
TOTAL DEPARTURE FOR THE MONTH.......................+2 [0.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............40   DEPARTURE........+17
TOTAL HEATING UNITS FOR THE MONTH.............310   DEPARTURE.........-2
TOTAL HEATING UNITS FOR THE SEASON............854   DEPARTURE........-21
TOTAL HEATING UNITS LAST SEASON TO DATE.......590   DIFFERENCE......+264

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................33 E   AT 11:48 P.M.
                   AERO.........................36 E   AT 11:44 P.M. 
                   ASOS.........................37 ENE AT 11:47 P.M. 
                   DAVIS........................36 E   AT 11:47 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................24 E   AT 11:35 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................23 E   AT 11:39 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................26 E   AT 11:48 P.M.
AVERAGE WIND SPEED AND DIRECTION...............7.8 NW
                   ASOS........................8.4  
                   DAVIS.......................8.1 NE [43 deg.]  

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....1.10  DEPARTURE.......+0.94
                         ASOS..............1.13
TOTAL PRECIPITATION FOR THE MONTH..........7.08  DEPARTURE.......+4.73
                         ASOS..............7.35 
TOTAL PRECIPITATION FOR THE YEAR..........60.12  DEPARTURE......+14.18
                         ASOS.............62.21 

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........6.5  DEPARTURE........+6.4
TOTAL SNOWFALL FOR THE MONTH................6.5  DEPARTURE........+5.9
TOTAL SNOWFALL FOR THE SEASON...............6.5  DEPARTURE........+5.6


PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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

11/01 65/49/57/+11/..../006/01         25 SSW AERO 24 SSW RMY N/A
11/02 65/52/59/+13/..../000/00         37 SSW AERO 41 SSW RMY N/A
11/03 64/42/53/+7/..../148/24          59 W   AERO 60 W   RMY 58
11/04 52/37/45/0/..../588/96           31 W   AERO 30 W   RMY N/A
11/05 49/40/45/0/..../000/00           30 ENE AERO 29 ENE RMY 28
11/06 58/45/52/+7/..../.../..          29 SSW AERO 29 SSW RMY 31
11/07 60/50/55/+10/..../.../..         30 WSW AERO 30 WSW RMY 32
11/08 52/37/45/+1/..../.../..          29 WNW AERO 26 WNW RMY 23
11/09 48/34/41/-3/..../.../..          43 E   AERO 40 E   RMY 42
11/10 45/32/39/-5/..../.../..          45 W   AERO 47 WNW RMY 46
11/11 43/30/37/-6/0.00/.../..          32 WNW AERO 30 W   RMY 32
11/12 48/27/38/-5/0.00/.../..          18 SW  AERO 18 SW  RMY N/A
11/13 52/37/45/+2/..../.../..          44 WNW AERO 44 WNW RMY 48
11/14 37/20/29/-13/..../.../..         45 WNW AERO 50 WNW RMY 50
11/15 30/19/25/-17/..../.../..         33 E   AERO 36 E   RMY N/A

11/16 Low temp since midnight is 30F; normal low is 34F

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

RECORDS FOR NOVEMBER 16
HIGH 73 IN 1927
LOW 8 IN 1933
PRECIP 2.25 INCHES IN 1981
SNOWFALL 2.0 IN 1913
PEAK GUST 78 S IN 1989

RECORDS FOR NOVEMBER 17
HIGH 74 IN 1928
LOW 10 IN 1924
PRECIP 1.92 INCHES IN 1920
SNOWFALL 1.0 INS IN 1980
PEAK GUST 61 SSE IN 2006

TODAY'S REPORT PREPARED BY: Nate Iannuccillo