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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, NOVEMBER 15, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR SKIES AND SEASONABLE TEMPERATURES ATOP 
GREAT BLUE HILL....

The 7 AM observation yielded clear skies that remained clear
throughout the course of the day. Winds have been out 
of the southwest, bumping up our max temperature to 50F 
before our 1 PM observation. Despite somewhat limited 
visibility due to haze, today has been a splendid reprieve 
from the bitter cold and cloudy skies that have dominated 
this week.

The high so far today is 50F, which equals the normal
maximum of 50F. The low since midnight is 32F, 2 degrees
below the normal minimum of 34F.  


PRELIMINARY STATS FOR OCTOBER 2019

TEMPERATURE, Deg. F
Avg. Max. 60.5 [+0.2]
Avg. Min. 46.7 [+3.8]
Mean      53.6 [+2.0]
24-hour corrected mean: 53.3
Max. for month: 77F on the 7th
Min. for month: 35F on the 5th

HEATING DEGREE DAYS
Total heating units:   347  [-74]
Total for the season:  440 [-123]
Total for last season: 543

PRECIPITATION, Inches
Total: 6.92 [+2.23]
Greatest in 24 hrs: N/A 

WIND, mph
Avg. uncorrected wind speed: 12.2 mph
Avg. corrected wind speed:   12.6 mph
Prevailing wind direction:   NE [13%]
Peak gust and direction:     61 S,E on the 17th, 31st

SUNSHINE:
Campbell-Stokes card minutes: 7074 minutes of possible 19824 or 36%
Astronomical total minutes: 7330 minutes of possible 20566 or 36%

This was the second cloudiest October on record!

BHO Lowest October Sunshine, hours (1886-2019):

1) 80.5 in 1913  [24%]
2) 117.9 in 2019  [36%]
3) 120.3 in 1896  [36%]
4) 121.6 in 1919  [37%]
5) 124.9 in 1888  [38%]

Today's Observations:

7 A.M.
Weather: Clear, Few Altostratus & Altocumulus Offshore, Hazy
Temperature: 33F; Dew Point: 22F; Wind: WSW AT 10 kts,
Sea-level pressure: 30.19 ins. Hg, rising then falling
Visibility: 50 miles
6-hr Max temp: 37F
6-hr Min temp: 32F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 CLR 50 225/33/22/2410/019/ FEW AS/AC OFFSHR HAZY/ 
8/080 58002 10037 20032

10 A.M.
Weather: Clear, Few Distant Cirrostratus and Few Distant 
Altostratus and Altocumulus Offshore, Hazy
Temperature: 44F; Dew Point: 20F; Wind: SW at 11 kts,
Sea-level pressure: 30.17 ins. Hg, rising then falling
Visibility: 40 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 40 218/44/20/2311/017/ FEW AS/AC FEW CS 
OFFSHR HAZY/ 8/088 58009 


1 P.M.
Weather: Clear, Few Cirrostratus SE-SW
Temperature: 49F; Dew Point: 23F; Wind: WSW at 11G19 kts
Sea-level pressure: 30.08 ins. Hg, falling then falling more slowly
Visibility: 50 miles
6-hr Max temp: 50F
6-hr Min temp: 33F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 50 187/49/23/24011G19/008/ FEW CS SE-SW 
HAZY/ 8/008 56031 10050 20033


SUMMARY FOR THURSDAY, NOVEMBER 14, 2019 

TEMPERATURE (DEGREES F)
MAX.....39   NORMAL.....51
MIN.....17   NORMAL.....34
MEAN....28   NORMAL.....42

DEPARTURE FROM 30-YEAR NORMAL...................-14
TOTAL DEPARTURE FOR THE MONTH...................-59 [-5.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............37  DEPARTURE........+14
TOTAL HEATING UNITS FOR THE MONTH..............362  DEPARTURE........+73
TOTAL HEATING UNITS FOR THE SEASON.............802  DEPARTURE........-50
TOTAL HEATING UNITS LAST SEASON TO DATE........813  DEPARTURE........-11

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................18 SW AT 10:49 P.M.  
                   AERO.........................17 SW AT 10:40 P.M  
                   ASOS.........................20 SW AT 10:52 P.M.
                   DAVIS........................20 S  AT 12:55 P.M. RMY 20
FASTEST MILE FOR YESTERDAY......................15 SW AT 11:04 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................15 SW AT 10:52 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................15 SW AT  9:57 P.M.
AVERAGE WIND SPEED AND DIRECTION................7.7 SSE                   
                   ASOS.........................8.4  
                   DAVIS........................8.1 SSW [198 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..........0.80  DEPARTURE......-1.40
                         ASOS..............0.84
TOTAL PRECIPITATION FOR THE YEAR..........46.14  DEPARTURE......+0.16
                         ASOS.............46.31

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.0
TOTAL SNOWFALL FOR THE MONTH................0.1  DEPARTURE.......-0.4
TOTAL SNOWFALL FOR THE SEASON...............0.1  DEPARTURE.......-0.7


PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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

10/01  67/52/60/+3/0.06/028/04               28 SW  AERO 25 SSW RMY 29
10/02  74/49/62/+5/0.42/021/03               30 ENE AERO 25 ENE RMY 28
10/03  51/46/49/-7/..../000/00               28 ENE AERO 26 ENE RMY N/A
10/04  59/40/50/-6/..../397/57               38 NNW AERO 38 NNW RMY 38
10/05  58/35/47/-9/0.00/687/99               21 N   AERO 18 SSW RMY N/A
10/06  65/44/55/0/0.00/263/38                36 SSW AERO 35 SSW RMY N/A
10/07  77/57/67/+12/0.12/316/46              47 SSW AERO 46 SSW RMY 49
10/08  60/52/56/+2/T/000/00                  22 NE  AERO 18 NW  RMY N/A
10/09  55/49/52/-2/..../000/00               43 NE  AERO 37 NE  RMY 44
10/10  54/47/51/-3/..../000/00               41 NE  AERO 37 NE  RMY 42
10/11  52/48/50/-3/..../000/00               41 NE  AERO 39 NE  RMY 41
10/12  52/49/51/-2/..../000/00               39 NE  AERO 37 NE  RMY N/A
10/13  66/48/57/+4/..../570/85               18 WNW AERO 17 WNW RMY 18
10/14  67/51/59/+7/..../335/50               18 WSW AERO 17 WSW RMY N/A
10/15  61/43/52/0/..../653/98                18 NNW AERO 17 NNW RMY N/A
10/16  61/45/53/+2/..../305/46               58 ESE AERO 58 ESE RMY N/A
10/17  60/46/53/+2/..../086/13               61 E   AERO 63 E   RMY N/A
10/18  57/41/49/-2/..../099/15               29 WNW AERO 32 W   RMY 32
10/19  58/36/47/-3/..../648/99               18 NW  AERO 18 NW  RMY 19
10/20  60/43/52/+2/T/280/43                  14 NE  AERO 16 NE  RMY N/A
10/21  59/49/54/+4/0.01/591/91               25 E   AERO 21 NE  RMY 23
10/22  58/47/53/+4/..../078/12               29 E   AERO 28 E   RMY 23
10/23  65/48/57/+8/..../431/67               35 W   AERO 35 W   RMY 36
10/24  67/43/55/+6/.../635/99                28 SSW AERO 28 SSW RMY 29
10/25  64/47/56/+7/.../217/34                20 WSW AERO 21 SW  RMY N/A
10/26  58/45/52/+4/.../502/79                20 N   AERO 18 N   RMY N/A
10/27  52/45/49/+1/1.43/000/00               37 ESE AERO 35 ESE RMY 37
10/28  53/46/50/+2/.../050/08                24 NNW AERO 24 NNW RMY N/A
10/29  54/47/51/+4/..../000/00               15 ESE AERO 15 ESE RMY 14
10/30  65/51/58/+11/..../138/22              24 S   AERO M  M   RMY N/A
10/31  68/58/63/+16/..../000/00              61 S   AERO M  M   RMY N/A

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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  67/35/51/+5/..../0.0/.../..            67 S   AERO M  M   RMY N/A
11/02  50/31/41/-5/0.00/0.0/.../..            17 WNW AERO 14 W   RMY N/A
11/03  53/35/44/-2/0.00/0.0/.../..            25 WSW AERO 23 W   RMY 26
11/04  53/33/43/-2/0.00/0.0/.../..            24 S   AERO 20 S   RMY 24
11/05  54/44/49/+4/0.33/0.0/.../..            22 S   AERO 18 WNW RMY 28
11/06  51/36/44/-1/0.00/0.0/.../..            28 WSW AERO 23 W   RMY 27
11/07  55/38/47/+2/0.27/0.0/.../..            30 S   AERO 26 SSW RMY 32
11/08  38/23/31/-13/0.00/0.0/.../..           38 NW  AERO 37 WNW RMY 44   
11/09  39/20/30/-14/0.00/0.0/.../..           22 S   AERO 18 S   RMY N/A
11/10  51/30/41/-3/0.00/0.0/.../..            30 SW  AERO 30 SW  RMY 31
11/11  52/39/46/+3/T/0.0/.../..               23 NE  AERO 22 NE  RMY 23
11/12  42/20/31/-12/0.08/0.1/.../..           37 WNW AERO 37 WNW RMY 41
11/13  28/15/22/-21/0.00/0.0/.../..           32 WNW AERO 32 WNW RMY 35
11/14  39/17/28/-14/0.00/0.0/.../..           18 SW  AERO 17 SW  RMY 20 

11/15 The low since midnight is 32F, daily normal minimum is 34F

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

RECORDS FOR NOVEMBER 15
HIGH 74 IN 1993
LOW 15 IN 1933
PRECIP 1.66 INCHES IN 1981
SNOWFALL 4.0 IN 1967
PEAK GUST 65 SSE IN 2008 

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

TODAY'S REPORT PREPARED BY: Andrew Swanson