Sunday, November 10, 2019

| November 10, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, NOVEMBER 10, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

MOSTLY CLOUDY WITH A COLD SOUTHWESTERLY WIND ATOP
GREAT BLUE HILL….

Today began partly cloudy, but became overcast before
noontime. Visibility has decreased from 75 miles at the
7 A.M. observation to 65 miles at the 1 P.M. observation.
There has been a stiff westerly wind, blowing at or above
20 mph. The highest gust seen today is 31 mph from the
southwest. In comparison to yesterday, temperatures are
slightly closer to seasonal averages. The high so far today
is 48F, which is 4 degrees below the normal of 52F. The low
since midnight is 30F, which is 5 degrees below the normal
minimum of 35F.

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: Scattered altocumulus, broken cirrostratus
Temperature: 32F; Dew Point: 20F; Wind: SW at 12 kts
Sea-level pressure: 30.11 ins. Hg, rising then falling
Visibility: 75 miles
6-hr Max temp: 32F
6-hr Min temp: 30F
24-hr Precip: 0.00 ins.
BHO SA 1155 140 SCT E250 BKN 75 196/32/20/2212/011/
8/078 55004 10032 20030

10 A.M.
Weather: Scattered altocumulus, broken cirrostratus
Temperature: 33F; Dew Point: 22F; Wind: SW at 11G18 kts
Sea-level pressure: 30.08 ins. Hg, falling steadily
Visibility: 65 miles
BHO SA 1455 140 SCT E250 BKN 65 187/33/22/2211G18/008/
8/078 58009

1 P.M.
Weather: Scattered altocumulus, broken cirrostratus,
few distant cumulus NE-S
Temperature: 47F; Dew Point: 28F; Wind: SW at 17G23 kts
Sea-level pressure: 29.99 ins. Hg, falling steadily
Visibility: 65 miles
6-hr Max temp: 48F
6-hr Min temp: 32F
BHO SA 1755 140 SCT E250 BKN 65 159/47/28/2117G23/999/
FEW DSNT CU NE-S/ 8/178 58028 10048 20032

SUMMARY FOR SATURDAY, NOVEMBER 9, 2019

TEMPERATURE (DEGREES F)
MAX…..39   NORMAL…..52
MIN…..20   NORMAL…..35
MEAN….30   NORMAL…..44

DEPARTURE FROM 30-YEAR NORMAL……………….-14
TOTAL DEPARTURE FOR THE MONTH……………….-26 [-3.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………35  DEPARTURE……..+14
TOTAL HEATING UNITS FOR THE MONTH…………..205  DEPARTURE……..+27
TOTAL HEATING UNITS FOR THE SEASON………….645  DEPARTURE……..-97
TOTAL HEATING UNITS LAST SEASON TO DATE……..676  DEPARTURE……..-31

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..22 S   AT  5:51 P.M.
AERO…………………….18 S   AT  5:39 P.M
ASOS…………………….24 S   AT  5:52 P.M.
DAVIS……………………21 SSW AT  5:50 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….17 S   AT  5:54 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….16 SW  AT  6:57 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………16 S   AT  5:37 P.M.
AVERAGE WIND SPEED AND DIRECTION……………..9.2 SW
ASOS…………………….10.2
DAVIS…………………….9.4 WSW [246 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……….0.72  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……..0.0
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  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 The low since midnight is 30F, daily normal minimum is 35F

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

RECORDS FOR NOVEMBER 10
HIGH 75 IN 1931
LOW 20 IN 2004
PRECIP 2.11 INCHES IN 1888
SNOWFALL 2.2 IN 1987
PEAK GUST 83e S IN 1942

RECORDS FOR NOVEMBER 11
HIGH 68 IN 1984
LOW 17 IN 1956
PRECIP 1.14 INCHES IN 1991
SNOWFALL 2.5 IN 1986
PEAK GUST 64 NW IN 1962

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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