Saturday, November 2, 2019

| November 2, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 2, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR AUTUMN WEATHER WITH EXCELLENT VISIBILITY
FOLLOWING BELOW FREEZING TEMPERATURES OVERNIGHT….

Today we observed very few clouds, and a visibility at or
above 80 miles. Wind was light and variable, with a peak
gust barely exceeding 10 mph. Pressure is steadily dropping,
with a 3 millibar decrease between 10 A.M. and 1 P.M.
Conditions are dry, with dew points in the mid 20’s and an
afternoon humidity of 35%.

October rainfall amounted to 6.92 inches, which is 2.23 inches
above the normal total of 4.69 inches.

The high so far today is 48F, 7 degrees below the
daily normal maximum of 55F. The low since midnight
is 31F, 7 degrees below the normal minimum of 38F.
This marks Blue Hill Observatory’s first overnight
freeze, about two weeks later than the average date
of October 20th!

Today’s Observations:

7 A.M.
Weather: Few distant cumulus offshore
Temperature: 32F; Dew Point: 25F; Wind: NW at 8 kts
Sea-level pressure: 30.25 ins. Hg, rising steadily
Visibility: 80 miles
6-hr Max temp: 34F
6-hr Min temp: 31F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 80 243/32/25/3208/025/ FEW DSNT CU OFFSHR/ 8/100
52006 10034 20031

10 A.M.
Weather: Few cumulus and stratocumulus
Temperature: 42F; Dew Point: 26F; Wind: NW at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.26 ins. Hg, falling then rising
Visibility: 80 miles
BHO SA 1455 CLR 80 245/42/26/3203/026/ FEW DSNT CU/SC NNW-SSE WND
L/V/ 8/800 50002

1 P.M.
Weather: Few cumulus and stratocumulus
Temperature: 48F; Dew Point: 24F; Wind: S at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.16 ins. Hg, falling, then more rapidly
Visibility: 80 miles
6-hr Max temp: 48F
6-hr Min temp: 32F
BHO SA 1755 CLR 80 276/48/24/1704/016/ FEW DSNT CU/SC ALQDS WND L/V/
8/800 56031 10048 20032

SUMMARY FOR FRIDAY, NOVEMBER 1, 2019

TEMPERATURE (DEGREES F)
MAX…..67   NORMAL…..55
MIN…..35   NORMAL…..38
MEAN….51   NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL………………..+5
TOTAL DEPARTURE FOR THE MONTH………………..+5 [+4.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………14  DEPARTURE………-5
TOTAL HEATING UNITS FOR THE MONTH……………14  DEPARTURE………-5
TOTAL HEATING UNITS FOR THE SEASON………….454  DEPARTURE…….-128
TOTAL HEATING UNITS LAST SEASON TO DATE……..551  DEPARTURE……..-97

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……….0
TOTAL COOLING UNITS FOR THE MONTH…………….2  DEPARTURE………-3
TOTAL COOLING UNITS FOR THE SEASON………….682  DEPARTURE……..+80
TOTAL COOLING UNITS LAST SEASON TO DATE……..874  DEPARTURE…….-192

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..67 S   AT 12:02 A.M.
AERO…………………….MISSING
ASOS…………………….70 S   AT 12:00 A.M.
DAVIS……………………66 S   AT 12:17 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….50 S   AT 12:08 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….49 S   AT 12:11 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………48 S   AT 12:10 A.M.
AVERAGE WIND SPEED AND DIRECTION…………….24.0 W
ASOS…………………….21.2
DAVIS……………………23.4 WSW [258 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……….0.12  DEPARTURE……-0.04
ASOS…………..0.12
TOTAL PRECIPITATION FOR THE YEAR……….45.46  DEPARTURE……+1.52
ASOS………….45.81

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/…/…/..                28 SSW AERO 28 SSW RMY 29
10/25  64/47/56/+7/…/…/..                20 WSW AERO 21 SW  RMY N/A
10/26  58/45/52/+4/…/…/..                20 N   AERO 18 N   RMY N/A
10/27  52/45/49/+1/1.43/…/..               37 ESE AERO 35 ESE RMY 37
10/28  53/46/50/+2/…/…/..                24 NNW AERO 24 NNW RMY N/A
10/29  54/47/51/+4/…./…/..               15 ESE AERO 15 ESE RMY 14
10/30  65/51/58/+11/…./…/..              24 S   AERO M  M   RMY N/A
10/31  68/58/63/+16/…./…/..              61 S   AERO M  M   RMY

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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

11/01  67/35/51/+5/…./…/..               67 S   AERO M  M RMY N/A

11/02 The low since midnight is 31F, daily normal minimum is 37F

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

RECORDS FOR NOVEMBER 2
HIGH 81 IN 1950
LOW 22 IN 1965
PRECIP 1.67 INCHES IN 1970
SNOWFALL 1.8 IN 2014
PEAK GUST 63 WSW IN 1973

RECORDS FOR NOVEMBER 3
HIGH 75 IN 1990
LOW 21 IN 1891
PRECIP 1.92 INCHES IN 1951
SNOWFALL 0.1 IN 1951
PEAK GUST 96e SSE IN 1951

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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