Monday, November 11, 2019

| November 11, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, NOVEMBER 11, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

A MOSTLY CLOUDY DAY WITH NEAR SEASONABLE TEMPS ….

Clouds have definitely been the theme for today with reduced
visibility. Visibility has been no higher than 30 miles today
with hazy conditions.

Temperatures briefly got into the low 50s early this afternoon,
but has since dropped back into the upper 40s due to thicker
clouds and an increasing onshore wind.

The high so far today is 52F, which is exactly normal for
today. The low since midnight is 39F, which is 4 degrees above
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: Overcast altocumulus, breaks in overcast SE-S
Temperature: 42F; Dew Point: 29F; Wind: SSW at 7 kts
Sea-level pressure: 30.12 ins. Hg, rising, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 42F
6-hr Min temp: 39F
24-hr Precip: 0.00 ins.
BHO SA 1155 E65 OVC 30 198/42/29/2007/012/ BINOVC SE-S HAZY/
8/05/ 53015 10042 20039

10 A.M.
Weather: Overcast altocumulus, few stratocumulus NE and S-SW,
breaks in overcast SE-SSW
Temperature: 48F; Dew Point: 35F; Wind: SW at 3 kts
Sea-level pressure: 30.14 ins. Hg, rising, then more slowly
Visibility: 25 miles, hazy
BHO SA 1455 E60 OVC 25 206/48/35/2303/014/ FEW SC NE AND S-SW
BINOVC SE-SSW HAZY WND LGT/ 8/55/ 51008

1 P.M.
Weather: Scattered stratocumulus, broken altocumulus,
thin overcast cirrus
Temperature: 52F; Dew Point: 36F; Wind: NE at 6 kts
Sea-level pressure: 30.08 ins. Hg, falling, then more rapidly
Visibility: 25 miles, 15 miles NW-N
6-hr Max temp: 52F
6-hr Min temp: 42F
BHO SA 1755 40 SCT E65 BKN 250 –OVC 25 187/52/36/0406/008/
VSBY 15 NW-N HAZY WND LGT/ 8/551 58019 10052 20042

SUMMARY FOR SUNDAY, NOVEMBER 10, 2019

TEMPERATURE (DEGREES F)
MAX…..51   NORMAL…..52
MIN…..30   NORMAL…..35
MEAN….41   NORMAL…..44

DEPARTURE FROM 30-YEAR NORMAL………………..-4
TOTAL DEPARTURE FOR THE MONTH……………….-30 [-3.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………24  DEPARTURE………+3
TOTAL HEATING UNITS FOR THE MONTH…………..229  DEPARTURE……..+29
TOTAL HEATING UNITS FOR THE SEASON………….669  DEPARTURE……..-94
TOTAL HEATING UNITS LAST SEASON TO DATE……..702  DEPARTURE……..-33

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..30 SW  AT 12:10 P.M.
AERO…………………….30 SW  AT 12:10 P.M
ASOS…………………….32 SW  AT 12:11 P.M.
DAVIS……………………31 S   AT 11:42 P.M. RMY 31
FASTEST MILE FOR YESTERDAY………………….24 SSW AT 12:33 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….24 SSW AT 12:32 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………24 SSW AT 12:31 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….12.4 SSW
ASOS…………………….12.8
DAVIS……………………12.2 SW [224 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……-0.84
ASOS…………..0.74
TOTAL PRECIPITATION FOR THE YEAR……….46.06  DEPARTURE……+0.72
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…….-0.4
TOTAL SNOWFALL FOR THE SEASON……………0.0  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 The low since midnight is 39F, 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 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

RECORDS FOR NOVEMBER 12
HIGH 74 IN 1909
LOW 18 IN 1926
PRECIP 3.25 INCHES IN 1947
SNOWFALL 8.1 INCHES IN 1987
PEAK GUST 79e MPH NW IN 1947

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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