Tuesday, November 27, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, NOVEMBER 27, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

WESTERLY WINDS INCREASING WITH LIGHT PRECIPITATION
THROUGHOUT THE DAY….NOVEMBER AND FALL 2018 NOW
THE WETTEST ON RECORD…

Fog this morning limited visibility to 1/16th mile, but
began to break up shortly before the 10 A.M. observation.
The highest visibility so far seen at 1 P.M is 70 miles. We
measured 1.50 inches from yesterday’s rain, and .02 inches from
the drizzle this morning at 10 A.M. We observed a pressure
fall of almost 4 millibars leading up to 7 A.M., but it has
started to trend upward moving into the afternoon. Winds have
increased since this morning, with the highest gust of 36 mph
occurring after 11 A.M. The high temperature reached so far
today is 45F, 1 degree below the daily normal of 46F. The
low since midnight is 36F, 6 degrees above the normal minimum
of 30F. Monthly and seasonal liquid precipitation have exceeded
previous records, statistics are listed below:

BHO Wettest Novembers, inches (1885-2018):

1) 10.30 in 2018 (through 7 AM on 11/27)
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 (Son-Nov), inches (1885-2018):

1) 25.40 in 2018 (through 7 AM on 11/27)
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: Light drizzle and fog
Temperature: 44F; Dew Point: 44F; Wind: SSW at 9G12 kts
Sea-level pressure: 29.20 ins. Hg, falling, then less rapidly
Visibility: 1/16 mile, fog
6-hr Max temp: 45F
6-hr Min temp: 40F
24-hr Precip: 1.50 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 W3 X 1/16L-F 889/44/44/2009G12/920/ L-CTD/ 8////
70150 56032 10045 20040

10 A.M.
Weather: Light drizzle and fog, overcast nimbostratus,
few stratus fractus
Temperature: 37F; Dew Point: 37F; Wind: W at 12G26 kts,
Peak wind: 30 mph (26 kts) W at 9:49 A.M.
Sea-level pressure: 29.23 ins. Hg, rising steadily
Visibility: 5 miles, fog
3-hr Precip: 0.02 ins.
3-hr snowfall: 0.0 ins.
BHO SA 1455 E35 OVC 5L-F 899/37/37/2612G26/923/ FEW STFRA
ALQDS L-CTD PK WND 2626/49/ 8/72/ 6002/ 53010

1 P.M.
Weather: Broken altocumulus
Temperature: 38F; Dew Point: 34F; Wind: W at 18G27 kts,
Peak wind: 32 mph (28 kts) W at 12:43 P.M.
Sea-level pressure: 29.25 ins. Hg, rising steadily
Visibility: 70 miles
6-hr Max temp: 45F
6-hr Min temp: 36F
6-hr Precip: 0.02 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 E30 BKN 70 904/38/34/2618G27/925/ PK WND
2628/43/ 8/020 6002/ 53005 10045 20036

SUMMARY FOR MONDAY, NOVEMBER 26, 2018

TEMPERATURE (DEGREES F)
MAX…..44   NORMAL…..46
MIN…..39   NORMAL…..30
MEAN….42   NORMAL…..38

DEPARTURE FROM 30-YEAR NORMAL……………………+4
TOTAL DEPARTURE FOR THE MONTH…………………..-73 [-3.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..23   DEPARTURE………-4
TOTAL HEATING UNITS FOR THE MONTH………….660   DEPARTURE……..+73
TOTAL HEATING UNITS FOR THE SEASON………..1204   DEPARTURE……..+53
TOTAL HEATING UNITS LAST SEASON TO DATE…….856   DIFFERENCE……+348

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..45 E   AT  9:38 P.M.
AERO…………………….44 E   AT  9:38 P.M.
ASOS…………………….46 E   AT  9:40 P.M.
DAVIS……………………47 E   AT  9:38 P.M. RMY 45
FASTEST MILE FOR YESTERDAY………………….34 E   AT  9:40 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….33 E   AT  9:40 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………36 E   AT  9:39 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..12.0 ESE
ASOS…………………..12.2
DAVIS………………….12.2 ESE [106 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….1.50  DEPARTURE…….+1.34
ASOS…………..1.59
TOTAL PRECIPITATION FOR THE MONTH………10.30  DEPARTURE…….+6.20
ASOS………….10.74
TOTAL PRECIPITATION FOR THE YEAR……….63.35  DEPARTURE……+15.66
ASOS………….65.61

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.2
TOTAL SNOWFALL FOR THE MONTH…………….7.6  DEPARTURE……..+5.9
TOTAL SNOWFALL FOR THE SEASON……………7.6  DEPARTURE……..+5.6

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 Low temp since midnight is 40F; normal low is 30F

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

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

RECORDS FOR NOVEMBER 27
HIGH 68 IN 1896
LOW 5 IN 1932
PRECIP 2.23 INS IN 2013
SNOWFALL 16.0 INS IN 1898
PEAK GUST 68 NW IN 1997

RECORDS FOR NOVEMBER 28
HIGH 70 IN 1990
LOW 10 IN 1901,1930,1936
PRECIP 1.84 INCHES IN 1889
SNOWFALL 3.0 INS IN 1917
PEAK GUST 90 SSW IN 1958

TODAY’S REPORT PREPARED BY: Benjamin Turner / Mike Iacono