Thursday, November 7, 2019

| November 7, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, NOVEMBER 7, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

SEASONABLE AND OVERCAST WITH LIMITED VISIBILITY….

Following yesterday’s almost clear skies, weather conditions
are overcast and dry, with an average visibility of 40 miles.
Wind was southwesterly and steady at 20 mph, with a max gust
of almost 30 mph. Pressure has fallen by around 6 millibars
since this morning, and an increase in lower level clouds
has been observed.

The high so far today is 55F, which is 2 degrees above the
normal of 53F. The low since midnight is 39F, which is 3
degrees above 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: Broken altocumulus
Temperature: 43F; Dew Point: 30F; Wind: SSW at 16G23 kts
Sea-level pressure: 30.22 ins. Hg, falling steadily
Visibility: 60 miles
6-hr Max temp: 43F
6-hr Min temp: 39F
24-hr Precip: 0.00 ins.
BHO SA 1155 E110 BKN 60 232/43/30/2016G23/022/ 8/070 56021
10043 20039

10 A.M.
Weather: Overcast altocumulus
Temperature: 50F; Dew Point: 38F; Wind: S at 16G21 kts
Sea-level pressure: 30.15 ins. Hg, falling steadily
Visibility: 35 miles, distant haze
BHO SA 1455 E110 OVC 35 211/50/38/1916G21/015/ DSNT HZ
ALQDS/ 8/07/ 56021

1 P.M.
Weather: Overcast altocumulus with a few stratus fractus
Temperature: 54F; Dew Point: 38F; Wind: SW at 17G23 kts
Sea-level pressure: 30.04 ins. Hg, falling, then more rapidly
Visibility: 40 miles
6-hr Max temp: 55F
6-hr Min temp: 43F
BHO SA 1755 E110 OVC 40 177/54/38/2117G23/004/ FEW STFA
ALQDS/ 8/77/ 58034 10055 20043

SUMMARY FOR WEDNESDAY, NOVEMBER 6, 2019

TEMPERATURE (DEGREES F)
MAX…..51   NORMAL…..53
MIN…..36   NORMAL…..36
MEAN….44   NORMAL…..45

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

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………21  DEPARTURE………+1
TOTAL HEATING UNITS FOR THE MONTH…………..118  DEPARTURE………+2
TOTAL HEATING UNITS FOR THE SEASON………….558  DEPARTURE…….-122
TOTAL HEATING UNITS LAST SEASON TO DATE……..622  DEPARTURE……..-64

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..28 WSW AT  2:31 P.M.
AERO…………………….23 W   AT 10:21 A.M
ASOS…………………….29 WNW AT 12:16 A.M.
DAVIS……………………29 WNW AT 12:15 A.M. RMY 27
FASTEST MILE FOR YESTERDAY………………….22 WSW AT  2:32 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 W   AT  1:18 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………22 W   AT  1:11 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….11.5 W
ASOS…………………….10.1
DAVIS……………………12.3 W [270 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……….0.45  DEPARTURE……-0.64
ASOS…………..0.47
TOTAL PRECIPITATION FOR THE YEAR……….45.79  DEPARTURE……+0.92
ASOS………….45.94

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…….-0.2
TOTAL SNOWFALL FOR THE SEASON……………0.0  DEPARTURE…….-0.5

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 The low since midnight is 39F, 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 7
HIGH 75 IN 1938
LOW 21 IN 1930
PRECIP 2.02 INCHES IN 1953
SNOWFALL 3.5 IN 2012
PEAK GUST 69e ENE IN 1953

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

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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