Sunday, December 2, 2018

| December 2, 2018 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, DECEMBER 2, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

WARMER, RAINY DAY WITH LOW VISIBILITY ON TOP OF GREAT
BLUE HILL…

Temperatures today have been higher than they have been
in the past several weeks, with a high temperature so far
of 47F. Rain storms moving in throughout the night last
night brought gusty wind and fog, with wind speeds
frequently gusting over 20 knots, and visibility that has
not yet surpassed 1/16th of a mile all day. 0.69 inches of
rain have fallen so far since midnight, with 0.36 inches
falling between 7 A.M. and 1 P.M. Pressure has been dropping
rapidly since around 6 A.M., with an average decrease of about
1.7 millibars of mercury per hour.

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: Moderate rain, fog
Temperature: 38F; Dew Point: 38F; Wind: E at 11G20 kts
Sea-level pressure: 30.03 ins. Hg, falling, then more quickly
Visibility: 1/16 mile
6-hr Max temp: 38F
6-hr Min temp: 35F
24-hr Precip: 0.33 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 W2 X 1/16RF 169/38/38/0911G20/003/ 8//// 70033
58022 10038 20035

10 A.M.
Weather: Moderate rain, fog
Temperature: 43F; Dew Point: 43F; Wind: ESE at 16G22 kts
Sea-level pressure: 29.93 ins. Hg, falling, then more quickly
Visibility: 1/16 mile
3-hr Precip: 0.28 ins.
3-hr snowfall: 0.0 ins.
BHO SA 1455 W2 X 1/16RF 135/43/43/1216G22/993/ 8//// 6028/
58034

1 P.M.
Weather: Light drizzle, fog
Temperature: 47F; Dew Point: 47F; Wind: SSE at 8 knots
Sea-level pressure: 29.74 ins. Hg, falling rapidly
Visibility: 1/16 mile
6-hr Max temp: 47F
6-hr Min temp: 38F
6-hr Precip: 0.36 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 W2 X 1/16L-F 071/47/47/1608/974/ 8//// 6036/
56064 10047 20038

SUMMARY FOR SATURDAY, DECEMBER 1, 2018

TEMPERATURE (DEGREES F)
MAX…..41   NORMAL…..44
MIN…..28   NORMAL…..29
MEAN….35   NORMAL…..37

DEPARTURE FROM 30-YEAR NORMAL……………………-2
TOTAL DEPARTURE FOR THE MONTH……………………-2 [-2.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..30   DEPARTURE……….1
TOTAL HEATING UNITS FOR THE MONTH…………..30   DEPARTURE………+1
TOTAL HEATING UNITS FOR THE SEASON………..1350   DEPARTURE……..+60
TOTAL HEATING UNITS LAST SEASON TO DATE……1020   DIFFERENCE……+359

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..20 NNW AT 7:16 A.M.
AERO…………………….18 NNW AT 7:10 A.M.
ASOS…………………….20 NNW AT 7:23 A.M.
DAVIS……………………20 N   AT 7:03 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….14 NNW AT 7:24 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….14 NNW AT 7:25 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………14 N   AT 7:13 A.M.
AVERAGE WIND SPEED AND DIRECTION……………7.0 ESE
ASOS……………………7.4
DAVIS…………………..7.6 NNE [16 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.33  DEPARTURE…….+0.17
ASOS…………..0.33
TOTAL PRECIPITATION FOR THE MONTH……….0.33  DEPARTURE…….+0.17
ASOS…………..0.33
TOTAL PRECIPITATION FOR THE YEAR……….63.70  DEPARTURE……+15.20
ASOS………….65.96

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.2
TOTAL SNOWFALL FOR THE MONTH…………….0.0  DEPARTURE……..-0.2
TOTAL SNOWFALL FOR THE SEASON……………7.6  DEPARTURE……..+4.7

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 Low temp since midnight is 35F; normal low is 28F

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

RECORDS FOR DECEMBER 2
HIGH 61 IN 1998
LOW 3 IN 1890
PRECIP 2.09 INS. IN 1974
SNOWFALL 5.0 INS. IN 1894, 1929
PEAK GUST 89e MPH SSE IN 1942

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

TODAY’S REPORT PREPARED BY: Samantha Richard

 

Category: Daily Discussions

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