Saturday, November 9, 2019

| November 9, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 9, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

DRY AND UNSEASONABLY COLD WITH A LIGHT WESTERLY
BREEZE….

Weather conditions were fair following a deep freeze that
occurred overnight. Visibility was 85 miles or more under
partly cloudy skies. The air is dry, reaching a relative
humidity of 30% in the afternoon. A high pressure center
from the northwest has moved into the region, bringing
with dry and cold continental air. This has kept temperatures
well below seasonal averages. The high so far today is 37F,
which is 15 degrees below the normal of 52F. The low since
midnight is 20F, which is 15 degrees below the normal minimum
of 35F. The low temperature today was just a few degrees
above the record low for the date of 17F set in 1971.

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 distant cirrus and cumulus
Temperature: 20F; Dew Point: 14F; Wind: W at 9 kts
Sea-level pressure: 30.32 ins. Hg, rising steadily
Visibility: 85 miles
6-hr Max temp: 23F
6-hr Min temp: 20F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 85 267/20/14/2809/032/ FEW DSNT CU/CI ALQDS/
8/102 52016 10023 20020

10 A.M.
Weather: Broken cirrus, few distant cumulus offshore
Temperature: 31F; Dew Point: 17F; Wind: WNW at 5 kts,
Wind: Light
Sea-level pressure: 30.34 ins. Hg, falling then rising
Visibility: 85 miles
BHO SA 1455 E250 BKN 85 273/31/17/2905/034/ FEW DSNT CU OFFSHR
WND LGT/ 8/102 50006

1 P.M.
Weather: Broken cirrus, few distant cumulus
Temperature: 37F; Dew Point: 11F; Wind: SW at 7 kts
Sea-level pressure: 30.27 ins. Hg, falling steadily
Visibility: 85 miles
6-hr Max temp: 37F
6-hr Min temp: 20F
BHO SA 1755 E250 BKN 85 251/37/11/2407/027/ FEW DSNT CU ALQDS/
8/102 58022 10037 20020

SUMMARY FOR FRIDAY, NOVEMBER 8, 2019

TEMPERATURE (DEGREES F)
MAX…..38   NORMAL…..53
MIN…..23   NORMAL…..36
MEAN….31   NORMAL…..44

DEPARTURE FROM 30-YEAR NORMAL……………….-13
TOTAL DEPARTURE FOR THE MONTH……………….-12 [-1.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………34  DEPARTURE……..+13
TOTAL HEATING UNITS FOR THE MONTH…………..170  DEPARTURE……..+13
TOTAL HEATING UNITS FOR THE SEASON………….610  DEPARTURE…….-111
TOTAL HEATING UNITS LAST SEASON TO DATE……..652  DEPARTURE……..-42

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..38 NW  AT  1:43 P.M.
AERO…………………….37 WNW AT  2:22 P.M
ASOS…………………….42 NW  AT  1:55 P.M.
DAVIS……………………42 WNW AT  2:20 P.M. RMY 44
FASTEST MILE FOR YESTERDAY………………….29 WNW AT  2:28 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….28 NW  AT  2:27 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………31 NW  AT  2:25 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….15.0 NW
ASOS…………………….14.9
DAVIS……………………15.2 NW [313 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.72  DEPARTURE……-0.52
ASOS…………..0.74
TOTAL PRECIPITATION FOR THE YEAR……….46.06  DEPARTURE……+1.04
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 The low since midnight is 20F, 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 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

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

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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