Sunday, December 1, 2019

| December 1, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, DECEMBER 1, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST SKIES WITH SOME SNOW IN THE
EARLY AFTERNOON….

The sky has been overcast today, with a light easterly
wind. Visibility this morning was good at an average of
70 miles, but is now less than 20 miles due to a light
snowfall. About a 1/10th inch of snow has fallen since
the 1 P.M. observation.

The daily snowfall records for the next two days are
relatively low and may be surpassed in the upcoming storm.
The current records are:
December 1: 2.0 inches in 1902
December 2: 5.0 inches in 1894 and 1929

The high so far today is 29F, which is 15 degrees below the
daily normal maximum of 44F. The low since midnight is 16F,
which is 13 degrees below the normal minimum of 29F.

Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 17F; Dew Point: 9F; Wind: N at 7 kts
Sea-level pressure: 30.04 ins. Hg, falling, then rising,
now higher
Visibility: 75 miles
6-hr Max temp: 21F
6-hr Min temp: 16F
24-hr Precip:  0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E40 OVC 75 172/17/9/3607/004/ 8/6// 51012
10021 20016

10 A.M.
Weather: Overcast stratus
Temperature: 26F; Dew Point: 19F; Wind: N at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.05 ins. Hg, rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E40 OVC 70 174/26/19/0104/005/ WND L/V/ 8/6//
53002

1 P.M.
Weather: Overcast stratus
Temperature: 29F; Dew Point: 23F; Wind: E at 4 kts,
Wind: Light and variable
Sea-level pressure: 29.97 ins. Hg, falling, then more quickly
Visibility: 65 miles
6-hr Max temp: 29F
6-hr Min temp: 17F
6-hr Precip: 0.00 ins.
BHO SA 1755 E40 OVC 65 147/29/23/0804/997/ WND L/V/ 8/6// 56027
10029 20017

SUMMARY FOR SATURDAY, NOVEMBER 30, 2019

TEMPERATURE (DEGREES F)
MAX…..35   NORMAL…..45
MIN…..22   NORMAL…..29
MEAN….29   NORMAL…..37

DEPARTURE FROM 30-YEAR NORMAL…………………-8
TOTAL DEPARTURE FOR THE MONTH………………..-100 [-3.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………36  DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE MONTH…………..797  DEPARTURE…….+99
TOTAL HEATING UNITS FOR THE SEASON…………1237  DEPARTURE…….-24
TOTAL HEATING UNITS LAST SEASON TO DATE…….1319  DEPARTURE…….-82

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..30  NW AT  6:47 A.M.
AERO…………………….29  NW AT  5:00 A.M.
ASOS…………………….32  NW AT  6:47 A.M.
DAVIS……………………32 WNW AT  1:59 P.M. RMY 31
FASTEST MILE FOR YESTERDAY………………….23  NW AT 12:08 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….23  NW AT 12:08 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………24 WNW AT 12:07 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..15.5  NW
ASOS…………………..15.0
DAVIS………………….15.7  NW [312 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……….3.74  DEPARTURE……-1.02
ASOS…………..3.93
TOTAL PRECIPITATION FOR THE YEAR……….49.08  DEPARTURE……+0.54
ASOS………….49.40

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.2
TOTAL SNOWFALL FOR THE MONTH…………….0.1  DEPARTURE…….-2.2
TOTAL SNOWFALL FOR THE SEASON……………0.1  DEPARTURE…….-2.5

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/…./0.0/534/86            67 S   AERO M  M   RMY N/A
11/02  50/31/41/-5/0.00/0.0/612/99            17 WNW AERO 14 W   RMY N/A
11/03  53/35/44/-2/0.00/0.0/567/92            25 WSW AERO 23 W   RMY 26
11/04  53/33/43/-2/0.00/0.0/546/89            24 S   AERO 20 S   RMY 24
11/05  54/44/49/+4/0.33/0.0/000/00            22 S   AERO 18 WNW RMY 28
11/06  51/36/44/-1/0.00/0.0/596/98            28 WSW AERO 23 W   RMY 27
11/07  55/38/47/+2/0.27/0.0/000/00            30 S   AERO 26 SSW RMY 32
11/08  38/23/31/-13/0.00/0.0/555/92           38 NW  AERO 37 WNW RMY 44
11/09  39/20/30/-14/0.00/0.0/583/97           22 S   AERO 18 S   RMY N/A
11/10  51/30/41/-3/0.00/0.0/174/29            30 SW  AERO 30 SW  RMY 31
11/11  52/39/46/+3/T/0.0/000/00               23 NE  AERO 22 NE  RMY 23
11/12  42/20/31/-12/0.08/0.1/000/00           37 WNW AERO 37 WNW RMY 41
11/13  28/15/22/-21/0.00/0.0/592/100          32 WNW AERO 32 WNW RMY 35
11/14  36/17/28/-14/0.00/0.0/136/23           18 SW  AERO 17 SW  RMY 20
11/15  51/32/42/0/0.00/0.0/553/94             25 WNW AERO 25 WNW RMY N/A
11/16  35/22/29/-13/0.00/0.0/580/99           35 NNW AERO 35 NNW RMY N/A
11/17  40/21/31/-10/T/T/…/..                28 ENE AERO 27 ENE RMY 29
11/18  36/32/34/-7/…./0.0/…/..            28 NNE AERO 29 N   RMY 31
11/19  42/36/39/-2/…./0.0/…/..            12 SSW AERO  9 NNW RMY N/A
11/20  38/33/36/-4/…./T/…/..              20 NW  AERO 18 NW  RMY 21
11/21  46/30/38/-2/0.00/0.0/…/..            21 NW  AERO 21 NW  RMY N/A
11/22  52/32/42/+2/0.12/0.0/…/..            46 W   AERO 47 W   RMY 47
11/23  44/27/36/-3/0.00/0.0/…/..            29 WNW AERO 29 WNW RMY N/A
11/24  44/35/40/+1/1.49/0.0/…/..            45 N   AERO 44 NE  RMY 46 TSTM
11/25  50/34/42/+3/0.00/0.0/…/..            32 WNW AERO 35 WNW RMY 23
11/26  59/39/49/+11/0.00/0.0/…/..           28 SSW AERO 27 SSW RMY 29
11/27  50/42/46/+8/…./0.0/…/..            30 W   AERO 32 W   RMY N/A TSTM
11/28  48/30/39/+1/…./T/…/..              42 NW  AERO 44 NW  RMY 44
11/29  39/27/33/-4/0.00/0.0/…/..            35 NW  AERO 36 NW  RMY 39
11/30  35/22/29/-8/0.00/0.0/…/..            30 NW  AERO 28 WNW RMY 31

12/01 The low since midnight is 16F, daily normal minimum is 29F

DAILY RECORDS FOR NOVEMBER

11/13/19: DAILY RECORD LOW MAXIMUM TEMPERATURE OF 28F,
BREAKS PREVIOUS RECORD OF 30F SET IN 1920.
It was also the third earliest maximum temperature
colder than 30F on record, behind only 28F on 11/8/1894
and 29F on 11/12/1894.

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: Benjamin Turner

Category: Daily Discussions

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