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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 17, 2018 
ALL TIMES ARE IN EASTERN STANDARD TIME

COOL AND HAZY DAY ON TOP OF GREAT BLUE HILL...

Today's visibility has been slightly limited due to a distant
haze throughout each observation. Pressure was rising
after 7 o'clock leading to a decrease in cloud cover 
by our 10 o'clock observation, but began to fall slowly
after, leading to a then increase in cloud cover at our
1 o'clock observation. Our high so far today has been 46F, 
4 degrees below our normal maximum temperature of 50F. 

Thursday's snowfall of 6 inches breaks the previous record of 
4 inches set in 1967.

Today's Observations:

7 A.M.
Weather: Broken stratus, distant haze in all directions
Temperature: 39F; Dew Point: 39F; Wind: WSW at 10G16 kts,  
Sea-level pressure: 30.04 ins. Hg, rising quickly      
Visibility: 70 miles
6-hr Max temp: 36F
6-hr Min temp: 34F
24-hr Precip: 0.30 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 3 ins.   
BHO SA 1155 E45 BKN 70 173/36/31/2410G16/004/ DSNT HZ 
ALQDS 8/600 4/003 70030 53035 10036 20034

10 A.M.
Weather: Scattered stratocumulus, few cumulus and distant
haze in all directions
Temperature: 41F; Dew Point: 31F; Wind: WSW at 10G19 kts,  
Sea-level pressure: 30.10 ins. Hg, rising then more slowly 
Visibility: 70 miles
3-hr Precip: 0.00 ins.
3-hr snowfall: 0.0 ins. 
BHO SA 1455 45 SCT 70 192/41/31/2510G19/010/ DSNT HZ 
ALQDS FEW CU ALQDS/ 51019

1 P.M.
Weather: Overcast stratus, distant haze in all directions
Temperature: 42F; Dew Point: 30F; Wind: W at 10G17 kts, 
Sea-level pressure: 30.09 ins. Hg, falling then steady   
Visibility: 70 miles
6-hr Max temp: 46F
6-hr Min temp: 36F 
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 2 ins.
BHO SA 1755 E45 OVC 70 189/42/30/2610G17/009/ DSNT HZ 
ALQDS/ 8/600 4/002 56003 10045 20036
 
SUMMARY FOR FRIDAY, NOVEMBER 16, 2018 

TEMPERATURE (DEGREES F)
MAX.....41   NORMAL.....50
MIN.....30   NORMAL.....34
MEAN....36   NORMAL.....42

DEPARTURE FROM 30-YEAR NORMAL.......................-6
TOTAL DEPARTURE FOR THE MONTH.......................-4 [-0.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............29   DEPARTURE.........+6
TOTAL HEATING UNITS FOR THE MONTH.............339   DEPARTURE.........+4
TOTAL HEATING UNITS FOR THE SEASON............883   DEPARTURE........-15
TOTAL HEATING UNITS LAST SEASON TO DATE.......611   DIFFERENCE......+272

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................43 E   AT 5:12 A.M.
                   AERO.........................44 E   AT 5:07 A.M. 
                   ASOS.........................45 E   AT 4:59 A.M. 
                   DAVIS........................46 E   AT 5:05 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY......................37 E   AT 5:05 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................32 ENE AT 4:59 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................35 E   AT 5:05 A.M.
AVERAGE WIND SPEED AND DIRECTION..............19.1 ENE
                   ASOS.......................18.4
                   DAVIS......................19.2 NE [39 deg.]  

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.30  DEPARTURE.......+0.15
                         ASOS..............0.32
TOTAL PRECIPITATION FOR THE MONTH..........7.38  DEPARTURE.......+4.88
                         ASOS..............7.67 
TOTAL PRECIPITATION FOR THE YEAR..........60.42  DEPARTURE......+14.33
                         ASOS.............62.53

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.........0.0
TOTAL SNOWFALL FOR THE MONTH................7.0  DEPARTURE........+6.4
TOTAL SNOWFALL FOR THE SEASON...............7.0  DEPARTURE........+6.4


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 Low temp since midnight is 34F; normal low is 33F

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

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

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

TODAY'S REPORT PREPARED BY: Samantha Richard