Saturday, December 1, 2018

| December 1, 2018 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, DECEMBER 1, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR VISIBILITY DAY WITH FAIRLY LIGHT WIND SPEEDS…
NOVEMBER AND FALL FINISH AS THE WETTEST ON RECORD…

The day started with very few clouds, which increased in
quantity as the day progressed. Visibility has remained
fairly reasonable throughout the day, with Mount Monadnock
being faintly visible 70 miles away. The high temperature
so far today is 41F, 3 degrees below our normal daily
maximum of 44F. Wind speeds have remained fairly light,
only occasionally gusting over 10 knots.

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: Few stratocumulus in all directions
Temperature: 29F; Dew Point: 27F; Wind: NNW at 11G16 kts,
Sea-level pressure: 30.15 ins. Hg, rising unsteadily
Visibility: 70 miles
6-hr Max temp: 30F
6-hr Min temp: 28F
24-hr Precip: 0.00 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 CLR 70 209/29/27/3411G16/015/ FEW SC ALQDS 8/400
50022 10030 20028

10 A.M.
Weather: Scattered stratocumulus
Temperature: 37F; Dew Point: 28F; Wind: NNW at 4 kts,
Wind: light
Sea-level pressure: 30.18 ins. Hg, rising unsteadily
Visibility: 70 miles
3-hr Precip: 0.00 ins.
3-hr snowfall: 0.0 ins.
BHO SA 1455 25 SCT 70 220/37/28/3404/018 WND LGT/ 8/400 51011

1 P.M.
Weather: Scattered stratocumulus, scattered cirrocumulus
Temperature: 39F; Dew Point: 28F; Wind: calm
Sea-level pressure: 30.20 ins. Hg, falling then rising
Visibility: 70 miles
6-hr Max temp: 41F
6-hr Min temp: 29F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 30 SCT 250 SCT 70 226/39/28/0000/020/ WND CALM
8/409 53006 10041 20029

SUMMARY FOR FRIDAY, NOVEMBER 30, 2018

TEMPERATURE (DEGREES F)
MAX…..39   NORMAL…..45
MIN…..27   NORMAL…..29
MEAN….33   NORMAL…..37

DEPARTURE FROM 30-YEAR NORMAL……………………-4
TOTAL DEPARTURE FOR THE MONTH…………………..-79 [-2.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..32   DEPARTURE……….4
TOTAL HEATING UNITS FOR THE MONTH………….776   DEPARTURE……..+78
TOTAL HEATING UNITS FOR THE SEASON………..1320   DEPARTURE……..+59
TOTAL HEATING UNITS LAST SEASON TO DATE…….969   DIFFERENCE……+351

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..18 NW AT 12:44 A.M.
AERO…………………….16 NW AT 12:42 A.M.
ASOS…………………….18 NW AT 12:46 A.M.
DAVIS……………………18 NW AT 12:45 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….13 NW AT  6:25 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….13 NW AT  3:06 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………13 NW AT  3:06 A.M.
AVERAGE WIND SPEED AND DIRECTION……………6.1 NW
ASOS……………………6.5
DAVIS…………………..6.8 WNW [302 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……….0.00  DEPARTURE……..0.00
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….63.37  DEPARTURE……+15.03
ASOS………….65.63

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………0.0
TOTAL SNOWFALL FOR THE SEASON……………7.6  DEPARTURE……..+5.0

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

12/01 Low temp since midnight is 28F; normal low is 29F

DAILY RECORDS FOR NOVEMBER 2018

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

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

RECORDS FOR DECEMBER 1
HIGH 70 IN 2001
LOW 3 IN 1887
PRECIP 1.46 INS. IN 1917
SNOW 2.0 INS. IN 1902
PEAK GUST 72 MPH NW IN 1964

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

TODAY’S REPORT PREPARED BY: Samantha Richard

 

Category: Daily Discussions

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