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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, NOVEMBER 8, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR WEATHER WITH UNUSUALLY COLD TEMPERATURES AND A BUSY 
NORTHWEST WIND....

Following yesterday's mild temperatures in the mid-50s, a cold 
front swung through the area overnight leaving us with 0.27 inches
of rain, blustery NW winds, and colder than normal air. Nearly
clear skies were observed at 7:00 AM which quickly transitioned to 
broken fair weather cumulus clouds by the 10:00 AM observation. 
Visibility has remained 70+ miles throughout the day with the 3,165
foot peak of Mt. Monadnock in good view. Virga in the form of snow
showers were seen to our west at times. Max wind so far today is 
35 MPH with average wind chill ranging from the upper-teens to 
lower-twenties much of the day.

The high so far today is 36F, which is 17 degrees below the 
normal of 53F. The low since midnight is 28F, which is 8 
degrees below the normal minimum of 36F.

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: Few Altostratus & Altocumulus offshore, Few Cumulus SSW
Temperature: 29F; Dew Point: 20F; Wind: NW at 10G21 kts
Sea-level pressure: 39.97 ins. Hg, rising then rising more rapidly
Visibility: 70 miles
6-hr Max temp: 36F
6-hr Min temp: 28F
24-hr Precip: 0.27 ins.
BHO SA 1155 E030 FEW E050 70 149/29/20/31010G21/997/
FEW DSNT AS/AC OFFSHR FEW CU SSW 8/280 53011 10036 20029 70027

10 A.M.
Weather: Broken Cumulus
Temperature: 31F; Dew Point: 18F; Wind: NW at 14G23 kts 
Sea-level pressure: 30.00 ins. Hg, rising then rising more slowly
Visibility: 80 miles
BHO SA 1455 E045 BKN 80 158/31/18/31014G23/000/ BKN CU ALQDS
8/100 51009

1 P.M.
Weather: Broken cumulus
Temperature:32F; Dew Point: 12F; Wind: NW at 17G30 kts
Sea-level pressure: 30.01 ins. Hg, increasing then steady
Peak Wind: 35 MPH (30 kts) NW at 12:29 PM
Visibility: 80 miles
6-hr Max temp:32F
6-hr Min temp: 29F 
BH0 SA 1755 E050 BKN 80 162/32/12/31017G31/001/
BKN CU ALQDS VIRGA SW-N PK WND 3130/29 8/100 58004 10032 20029

SUMMARY FOR THURSDAY, NOVEMBER 7, 2019 

TEMPERATURE (DEGREES F)
MAX.....55   NORMAL.....53
MIN.....38   NORMAL.....36
MEAN....47   NORMAL.....45

DEPARTURE FROM 30-YEAR NORMAL....................+2
TOTAL DEPARTURE FOR THE MONTH....................+1 [-0.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............18  DEPARTURE.........-2
TOTAL HEATING UNITS FOR THE MONTH..............136  DEPARTURE.........-1
TOTAL HEATING UNITS FOR THE SEASON.............576  DEPARTURE.......-124
TOTAL HEATING UNITS LAST SEASON TO DATE........632  DEPARTURE........-56

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................30 S   AT  9:23 A.M.  
                   AERO.........................26 SSW AT 11:50 A.M  
                   ASOS.........................32 S   AT  9:22 A.M.
                   DAVIS........................31 S   AT  8:15 A.M. RMY 32
FASTEST MILE FOR YESTERDAY......................22     AT  9:20 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...................22 SSW AT  9:38 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................21 S   AT  9:32 A.M.
AVERAGE WIND SPEED AND DIRECTION................13.8 SSW                   
                   ASOS.........................14.1  
                   DAVIS........................13.6 SW [230 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.27  DEPARTURE......+0.11
                         ASOS..............0.27
TOTAL PRECIPITATION FOR THE MONTH..........0.72  DEPARTURE......-0.68
                         ASOS..............0.74
TOTAL PRECIPITATION FOR THE YEAR..........46.06  DEPARTURE......+0.88
                         ASOS.............46.21

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.1
TOTAL SNOWFALL FOR THE MONTH................0.0  DEPARTURE.......-0.3
TOTAL SNOWFALL FOR THE SEASON...............0.0  DEPARTURE.......-0.6


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 The low since midnight is 28F, daily normal minimum is 36F

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

RECORDS FOR NOVEMBER 8
HIGH 72 IN 1938
LOW 20 IN 1921
PRECIP 2.24 INCHES IN 1972
SNOWFALL 4.0 IN 1894
PEAK GUST 72e SE IN 1947

RECORDS FOR NOVEMBER 9
HIGH 72 IN 1975
LOW 17 IN 1971
PRECIP 1.37 INCHES IN 1969
SNOWFALL 0.2 IN 1921,1923
PEAK GUST 73e S IN 1943

TODAY'S REPORT PREPARED BY: Andrew Swanson