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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, NOVEMBER 18, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

COOL, CALM CONDITIONS ON TOP OF GREAT BLUE HILL...

The high temperature so far today is 40F, which is 9 
degrees lower than our normal maximum temperature of 49F.
Winds have remained calm for a majority of the day, only 
occasionally gusting to or above 10 knots, and only before 3 
A.M. Our peak wind speed so far today is 16 knots recorded by
our 420C anemometer at 12:20 A.M. Our low since midnight was
30F at around 4 this morning, which is 3 degrees below our 
normal minimum temperature of 33F. Only one inch of snow
remained today from Thursday night's storm that accumulated
8 inches of snow overall. Cloudy conditions persisted through
each observation from 7 A.M. to 1 P.M., however, visibility has 
remained at a good 80 miles all day.

Today's Observations:

7 A.M.
Weather: Scattered stratocumulus
Temperature: 33F; Dew Point: 27F; Wind: NNW at 6 kts,
Wind light  
Sea-level pressure: 30.35 ins. Hg, rising steadily      
Visibility: 80 miles
6-hr Max temp: 34F
6-hr Min temp: 30F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 1 ins.   
BHO SA 1155 30 SCT 220 SCT 80 276/33/27/3306/035/ WND LGT/ 
8/402 4/001 51024 10034 20030

10 A.M.
Weather: Broken cirrostratus, few cumulus in all directions
Temperature: 37F; Dew Point: 25F; Wind: N at 2 kts,
Wind light  
Sea-level pressure: 30.37 ins. Hg, falling then rising 
Visibility: 80 miles
3-hr Precip: 0.00 ins.
3-hr snowfall: 0.0 ins. 
BHO SA 1455 E220 BKN 80 285/37/25/3602/037/ FEW CU ALQDS 
WND LGT/ 8/108 4/001 51009


1 P.M.
Weather: Overcast cirrostratus, broken altostratus, 
scattered cumulus
Temperature: 39F; Dew Point: 33F; Wind: SW at 2 kts,
Wind light 
Sea-level pressure: 30.37 ins. Hg, falling then steady   
Visibility: 80 miles
6-hr Max temp: 40F
6-hr Min temp: 33F 
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 1 ins.
BHO SA 1755 100 SCT E240 BKN 260 OVC 80 262/39/33/2202/037/ 
WND LGT/ 8/416 4/001 58014 10040 20033
 
SUMMARY FOR SATURDAY, NOVEMBER 17, 2018 

TEMPERATURE (DEGREES F)
MAX.....45   NORMAL.....50
MIN.....34   NORMAL.....33
MEAN....40   NORMAL.....41

DEPARTURE FROM 30-YEAR NORMAL.......................-1
TOTAL DEPARTURE FOR THE MONTH.......................-5 [-0.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............25   DEPARTURE.........+1
TOTAL HEATING UNITS FOR THE MONTH.............364   DEPARTURE.........+5
TOTAL HEATING UNITS FOR THE SEASON............908   DEPARTURE........-14
TOTAL HEATING UNITS LAST SEASON TO DATE.......640   DIFFERENCE......+268

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................28 W   AT 1:45  P.M.
                   AERO.........................27 W   AT 10:37 P.M. 
                   ASOS.........................27 W   AT 4:59  A.M. 
                   DAVIS........................29 WNW AT 10:12 P.M. RMY 28
FASTEST MILE FOR YESTERDAY......................20 W   AT 10:13 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................21 W   AT 1:45  P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................23 W   AT 10:27 A.M.
AVERAGE WIND SPEED AND DIRECTION..............12.8 W
                   ASOS.......................12.7
                   DAVIS......................13.4 W [272 deg.]  

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..........7.38  DEPARTURE.......+4.72
                         ASOS..............7.67 
TOTAL PRECIPITATION FOR THE YEAR..........60.42  DEPARTURE......+14.17
                         ASOS.............62.53

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........-0.1
TOTAL SNOWFALL FOR THE MONTH................7.0  DEPARTURE........+6.2
TOTAL SNOWFALL FOR THE SEASON...............7.0  DEPARTURE........+5.9


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 41/30/36/-6/..../.../..          43 E   AERO 44 ENE RMY N/A
11/17 45/34/40/-1/0.00/.../..          28 W   AERO 27 W   RMY 28

11/18 Low temp since midnight is 30F; normal low is 33F

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

RECORDS FOR NOVEMBER 18
HIGH 72 IN 1963
LOW 10 IN 1936
PRECIP 1.80 INS IN 1929
SNOWFALL 6.3 INS IN 1980
PEAK GUST 60 SW IN 1987

RECORDS FOR NOVEMBER 19
HIGH 72 IN 1941
LOW 10 IN 1936
PRECIP 1.92 INCHES IN 1926
SNOWFALL 11.0 INS IN 1986
PEAK GUST 59e E IN 1945

TODAY'S REPORT PREPARED BY: Samantha Richard