Monday, December 3, 2018

| December 3, 2018 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, DECEMBER 3, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

FOG LIFTS AMIDST UNSEASONABLY WARM DAY, BUT CLOUD COVER PERSISTS…

The fog that lurked over the hill for the majority
of December 2 finally lifted in the morning hours of the observation
period, producing a clear sky in its wake that proved to be short lived.
Since then, low pressure has continued to endure with the
mercury holding steady throughout the day.  The maintained low
can partially account for the quick turnaround to a near overcast
sky by the time of the 1 P.M. observation, with a dense
stratocumulus layer replacing the relatively clear skies observed
at 10 P.M.  Southerly winds have been replaced by more zonal westerlies
that should help bring a return to more seasonal temperatures as the week
progresses.  Speeds have elevated throughout the day with a peak wind of
35 mph recorded at 12:45 P.M.. The rainfall total from this past storm has
started December off with a noteworthy 1.04 inches collected.

BHO Wettest Novembers, inches (1886-2018):

1) 10.32 in 2018
2) 9.78 in 1983
3) 9.29 in 1945
4) 9.17 in 1972
5) 8.95 in 1895
6) 8.93 in 1988
7) 8.79 in 1963

BHO Wettest Falls (Sep-Nov), inches (1886-2018):

1) 25.42 in 2018
2) 23.18 in 2005
3) 23.13 in 1996
4) 22.47 in 1888
5) 20.65 in 2011
6) 20.64 in 1932
7) 20.08 in 1962
Today’s Observations:

7 A.M.
Weather: Fog
Temperature: 48F; Dew Point: 48F; Wind: W at 10G18 kts
Sea-level pressure: 29.54 ins. Hg, rising slowly
Visibility: 1/16 mile
6-hr Max temp: 48F
6-hr Min temp: 45F
24-hr Precip: 0.71 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 W2 X 1/16F 003/48/48/2610G18/954/
8//// 70071 53004 10048 20045

10 A.M.
Weather: Few Cumulus, few altocumulus, few cirrus
Temperature: 51F; Dew Point: 49F; Wind: WSW at 9G15 kts
Sea-level pressure: 29.53 ins. Hg, falling slowly
Visibility: 40 miles
3-hr Precip: 0.00 ins.
3-hr snowfall: 0.0 ins.
BHO SA 1455 CLR 40 000/51/49/2509G15/953/
FEW CU FEW AC FEW CI 8192/ 56003

1 P.M.
Weather: Broken stratocumulus
Temperature: 50F; Dew Point: 35F; Wind: W at 19G30 knots
Peak wind: W 35 mph (30 knots) at 12:45 P.M.
Sea-level pressure: 29.51 ins. Hg, falling
Visibility: 70 miles
6-hr Max temp: 54F
6-hr Min temp: 47F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 E55 BKN 70 992/50/35/2819G30/951 PK WND 2830/45/
8/400 55008 10054 20047

SUMMARY FOR SUNDAY, DECEMBER 2, 2018

TEMPERATURE (DEGREES F)
MAX…..52   NORMAL…..44
MIN…..35   NORMAL…..28
MEAN….44   NORMAL…..36

DEPARTURE FROM 30-YEAR NORMAL……………………+8
TOTAL DEPARTURE FOR THE MONTH……………………+6 [+2.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..21   DEPARTURE………-8
TOTAL HEATING UNITS FOR THE MONTH…………..51   DEPARTURE………-7
TOTAL HEATING UNITS FOR THE SEASON………..1371   DEPARTURE……..+52
TOTAL HEATING UNITS LAST SEASON TO DATE……1048   DIFFERENCE……+351

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..28 ESE AT 9:46 A.M.
AERO…………………….25 ESE AT 9:31 A.M.
ASOS…………………….27 ESE AT 9:33 A.M.
DAVIS……………………27 ESE AT 9:13 A.M. RMY 27
FASTEST MILE FOR YESTERDAY………………….19 ESE AT 9:10 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….20 ESE AT 9:14 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………20 ESE AT 6:26 A.M.
AVERAGE WIND SPEED AND DIRECTION……………10.5 ESE
ASOS……………………11.4
DAVIS…………………..11.1 SSE [155 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.71  DEPARTURE…….+0.55
ASOS…………..0.47
TOTAL PRECIPITATION FOR THE MONTH……….1.04  DEPARTURE…….+0.56
ASOS…………..0.80
TOTAL PRECIPITATION FOR THE YEAR……….64.41  DEPARTURE……+15.59
ASOS………….66.43

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.3
TOTAL SNOWFALL FOR THE MONTH…………….0.0  DEPARTURE……..-0.8
TOTAL SNOWFALL FOR THE SEASON……………7.6  DEPARTURE……..+4.2

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 65/49/57/+11/…./006/01         25 SSW AERO 24 SSW RMY N/A
11/02 65/52/59/+13/…./000/00         37 SSW AERO 41 SSW RMY N/A
11/03 64/42/53/+7/…./144/24          59 W   AERO 60 W   RMY 58
11/04 52/37/45/0/…./570/96           31 W   AERO 30 W   RMY N/A
11/05 49/40/45/0/…./000/00           30 ENE AERO 29 ENE RMY 28
11/06 58/45/52/+7/…./000/00          29 SSW AERO 29 SSW RMY 31
11/07 60/50/55/+10/…./456/98         30 WSW AERO 30 WSW RMY 32
11/08 52/37/45/+1/…./234/78          29 WNW AERO 26 WNW RMY 23
11/09 48/34/41/-3/…./000/00          43 E   AERO 40 E   RMY 42
11/10 45/32/39/-5/…./576/100         45 W   AERO 47 WNW RMY 46
11/11 43/30/37/-6/0.00/462/80          32 WNW AERO 30 W   RMY 32
11/12 48/27/38/-5/0.00/000/00          18 SW  AERO 18 SW  RMY N/A
11/13 52/37/45/+2/…./458/80          44 WNW AERO 44 WNW RMY 48
11/14 37/20/29/-13/…./000/00         45 WNW AERO 50 WNW RMY 50
11/15 30/19/25/-17/…./…/..         33 E   AERO 36 E   RMY N/A
11/16 41/30/36/-6/…./…/..          43 E   AERO 44 ENE RMY N/A
11/17 45/34/40/-1/0.00/…/..          28 W   AERO 27 W   RMY 28
11/18 40/30/35/-6/0.00/…/..          21 W   AERO 21 W   RMY M
11/19 38/33/36/-5/…./…/..          16 E   AERO 14 E   RMY N/A
11/20 38/31/35/-5/…./…/..          30 NE  AERO 30 NE  RMY N/A
11/21 39/20/30/-10/…./…/..         40 WNW AERO 46 WNW RMY 47
11/22 20/09/15/-25/…./…/..         36 NW  AERO 41 NW  RMY 42
11/23 30/09/20/-19/0.00/…/..         25 SW  AERO 25 SW  RMY 27
11/24 43/24/34/-5/…./…/..          27 SW  AERO 27 ESE RMY N/A
11/25 43/40/42/+3/…./…/..          39 ENE AERO 39 ENE RMY 39
11/26 44/39/42/+4/…./…/..          45 E   AERO 44 E   RMY 45
11/27 45/33/39/+1/…./…/..          44 ENE AERO 44 ENE RMY N/A
11/28 39/31/35/-3/…./…/..          37 WNW AERO 41 WNW RMY 42
11/29 43/30/37/0/…./…/..           40 NW  AERO 41 NW  RMY 44
11/30 39/27/33/-4/0.00/…/..          18 NW  AERO 16 NW  RMY N/A

DAILY RECORDS FOR NOVEMBER 2017

11/22/18: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 20F,
BREAKS PREVIOUS RECORD OF 26F SET IN 1972 AND 2008
11/22/18: DAILY RECORD LOW MINIMUM TEMPERATURE OF 9F,
BREAKS PREVIOUS RECORD OF 12F SET IN 1987
11/23/18: DAILY RECORD LOW MINIMUM TEMPERATURE OF 9F,
TIES PREVIOUS RECORD OF 9F SET IN 1888

PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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

12/01 41/28/35/-2/0.00/…/..          20 NNW AERO 18 NNW RMY N/A
12/02 52/35/44/8/1.04/…/..           28 ESE AERO 25 ESE RMY 27

12/03 Low temp since midnight is 45F; normal low is 28F

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

RECORDS FOR DECEMBER 3
HIGH 67 IN 2009
LOW  -1 IN 1890
PRECIP 2.10 INS. IN 1986
SNOWFALL 6.0 INS. IN 1963
PEAK GUST 73e MPH W IN 1942

RECORDS FOR DECEMBER 4
HIGH 67 IN 1998
LOW -4 IN 1940
PRECIP 1.87 INS. IN 1968
SNOWFALL 6.0 INS. IN 1907
PEAK GUST 73 MPH WNW IN 1980

TODAY’S REPORT PREPARED BY: Nate Iannuccillo

 

Category: Daily Discussions

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