Friday, November 29, 2019

| November 29, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, NOVEMBER 29, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

WINDY AND COLD, BUT FAIR WEATHER…

A much better weather day today following yesterday’s showery
conditions. Visibility has been very good today increasing to
around 70 miles by early this afternoon.

Winds continue to be gusty today with gusts of 30-35 mph at
times. With the dew point in the low 20s, it makes it feel
pretty chilly out there today.

The high so far today is 39F, which is 6 degrees below the
daily normal maximum of 45F. The low since midnight is 28F,
which is 1 degree below the normal minimum of 29F.

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus distant offshore NE-SE
Temperature: 28F; Dew Point: 23F; Wind: NW at 13, gusting to 18 kts
Sea-level pressure: 30.12 ins. Hg, rising, then more rapidly
Visibility: 60 miles
6-hr Max temp: 30F
6-hr Min temp: 28F
24-hr Precip:  0.01 ins.
24-hr Snowfall: Trace.
BHO SA 1155 CLR 60 198/28/23/3213G18/012/ SC OFFSHR DSNT NE-SE
FEW CS SSE-SW-W/ 8/506 53015 70001 10030 20028

10 A.M.
Weather: Thin scattered Cirrus
Temperature: 34F; Dew Point: 21F; Wind: NW at 12, gusting to 18 kts
Sea-level pressure: 30.12ins. Hg, rising, then falling
Visibility: 65 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 250 –SCT 65 198/34/21/3212G18/012/ FEW SC DSNT ALQDS/ 8/501 50000

1 P.M.
Weather: Thin broken Cirrus
Temperature: 38F; Dew Point: 21F; Wind: NW at 18, gusting to 26 kts
Peak Wind: 29 kts at 12:35 P.M.
Sea-level pressure: 30.05 ins. Hg, falling, then more slowly
Visibility: 70 miles,
6-hr Max temp: 39F
6-hr Min temp: 28F
6-hr Precip: 0.00 ins.
BHO SA 1755 E250 –BKN 70 177/38/21/3218G26/005/ FEW SC OFFSHR DSNT NE-SE
AND W-NW PK WND 3229/35/ 8/502 56021 10039 20028

SUMMARY FOR THURSDAY, NOVEMBER 28, 2019

TEMPERATURE (DEGREES F)
MAX…..48   NORMAL…..45
MIN…..30   NORMAL…..30
MEAN….39   NORMAL…..38

DEPARTURE FROM 30-YEAR NORMAL……………….. +1
TOTAL DEPARTURE FOR THE MONTH………………..-88 [-3.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………26  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………..729  DEPARTURE…….+87
TOTAL HEATING UNITS FOR THE SEASON…………1169  DEPARTURE…….-36
TOTAL HEATING UNITS LAST SEASON TO DATE…….1259  DEPARTURE…….-90

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..42  NW AT 12:02 P.M.
AERO…………………….44  NW AT 12:02 P.M
ASOS…………………….42  NW AT  2:21 A.M.
DAVIS……………………43  NW AT  5:10 A.M. RMY 44
FASTEST MILE FOR YESTERDAY………………….33  NW AT 12:02 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….30  NW AT 12:03 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………31  NW AT 12:02 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..20.5  NW
ASOS…………………..18.1
DAVIS………………….20.1  NW [313 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01  DEPARTURE……-0.15
ASOS…………..0.03
TOTAL PRECIPITATION FOR THE MONTH……….3.74  DEPARTURE……-0.70
ASOS…………..3.93
TOTAL PRECIPITATION FOR THE YEAR……….49.08  DEPARTURE……+0.86
ASOS………….49.40

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..TRACE  DEPARTURE…….-0.1
TOTAL SNOWFALL FOR THE MONTH…………….0.1  DEPARTURE…….-1.8
TOTAL SNOWFALL FOR THE SEASON……………0.1  DEPARTURE…….-2.1

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 The low since midnight is 28F, 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 NOVEMBER 29
HIGH 66 IN 2011
LOW 6 IN 1901
PRECIP 2.69 INCHES IN 1963
SNOWFALL 6.0 INS IN 2012
PEAK GUST 86 SSE IN 1963

RECORDS FOR NOVEMBER 30
HIGH 67 IN 2006
LOW 7 IN 1887, 1929
PRECIP 2.42 INCHES IN 1944
SNOWFALL 10.2 INS IN 1945
PEAK GUST 90 SSW IN 1963

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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