Saturday, November 23, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 23, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR WEATHER WITH ALMOST PERFECT VISIBILITY
ATOP GREAT BLUE HILL….

We observed partly cloudy skies today, along with a perfect
visibility of 90 miles. We measured 0.12 inches from last
night’s rainfall. Wind has been consistent from the west,
blowing at an average of 10 mph. Dew points have remained
in the teens, with humidity decreasing to 30% by the 1 P.M.
observation.

The high so far today is 43F, which is 4 degrees below
the daily normal maximum of 47F. The low since midnight
is 27F, which is 4 degrees below the normal minimum of 31F.

Today’s Observations:

7 A.M.
Weather: Broken cirrus
Temperature: 27F; Dew Point: 17F; Wind: WNW at 10 kts
Sea-level pressure: 29.96 ins. Hg, rising steadily
Visibility: 90 miles
6-hr Max temp: 32F
6-hr Min temp: 27F
24-hr Precip:  0.12 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 E250 BKN 90 146/27/17/2910/996/ 8/001 70012
53016 10032 20027

10 A.M.
Weather: Broken cirrus
Temperature: 36F; Dew Point: 14F; Wind: W at 10 kts
Sea-level pressure: 29.98 ins. Hg, rising steadily
Visibility: 90 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E250 BKN 90 153/36/14/2710/998/ 8/001 51007

1 P.M.
Weather: Broken cirrus
Temperature: 43F; Dew Point: 15F; Wind: WSW at 8 kts
Sea-level pressure: 29.92 ins. Hg, falling steadily
Visibility: 85 miles
6-hr Max temp: 43F
6-hr Min temp: 27F
3-hr Precip: 0.00 ins.
BHO SA 1755 E250 BKN 85 135/43/15/2508/992/ 8/002 56018
10043 20027

SUMMARY FOR FRIDAY, NOVEMBER 22, 2019

TEMPERATURE (DEGREES F)
MAX…..52   NORMAL…..48
MIN…..32   NORMAL…..32
MEAN….42   NORMAL…..40

DEPARTURE FROM 30-YEAR NORMAL………………. +2
TOTAL DEPARTURE FOR THE MONTH……………….-95 [-4.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………23  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH…………..591  DEPARTURE……+109
TOTAL HEATING UNITS FOR THE SEASON…………1031  DEPARTURE…….-14
TOTAL HEATING UNITS LAST SEASON TO DATE…….1081  DEPARTURE…….-50

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..46 W   AT  5:49 P.M.
AERO…………………….47 W   AT  3:07 P.M
ASOS…………………….48 W   AT  5:51 P.M.
DAVIS……………………50 W   AT  5:46 P.M. RMY 47
FASTEST MILE FOR YESTERDAY………………….34 W   AT  3:08 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….32 WNW AT  3:09 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………35 WNW AT  3:07 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..19.7 SSW
ASOS…………………..18.0
DAVIS………………….19.1 WSW [245 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.12  DEPARTURE……-0.04
ASOS…………..0.12
TOTAL PRECIPITATION FOR THE MONTH……….1.83  DEPARTURE……-1.64
ASOS…………..1.90
TOTAL PRECIPITATION FOR THE YEAR……….47.17  DEPARTURE……-0.08
ASOS………….47.37

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.1
TOTAL SNOWFALL FOR THE MONTH…………….0.1  DEPARTURE…….-1.0
TOTAL SNOWFALL FOR THE SEASON……………0.1  DEPARTURE…….-1.3

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 The low since midnight is 27F, daily normal minimum is 31F

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 NOVEMBER 23
HIGH 73 IN 1931
LOW 9 IN 1888, 2018
PRECIP 2.33 INS IN 2006
SNOWFALL 5.5 INS IN 1989
PEAK GUST 64e S IN 1953

RECORDS FOR NOVEMBER 24
HIGH 69 IN 1931
LOW 7 IN 1897
PRECIP 1.76 INCHES IN 1901
SNOWFALL 4.5 INS IN 1936
PEAK GUST 69 SSW IN 1959

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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