Wednesday, November 28, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, NOVEMBER 28, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

A DISTANT FOG ACCOMPANIED BY AN OVERCAST SKY
IN THE AFTERNOON….

Visibility decreased from 70 miles to 35 miles today,
due to an increasing distant fog. Winds increased
after noontime, with an average wind speed of 20
mph and multiple gusts of almost 30 mph. The pressure
trend today has remained steady, with variation of less
than half a millibar. The high temperature reached so far
today is 39F, seven degrees below the daily normal of 46F.
The low since midnight is 31F, a degree above the normal
minimum of 30F.

BHO Wettest Novembers, inches (1886-2018):

1) 10.32 in 2018 (through 7 AM on 11/28)
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 (through 7 AM on 11/28)
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: Broken altostratus, few distant cumulus NE-W
Temperature: 32F; Dew Point: 28F; Wind: W at 13G16 kts
Sea-level pressure: 29.27 ins. Hg, steady
Visibility: 70 miles
6-hr Max temp: 33F
6-hr Min temp: 31F
24-hr Precip: 0.02 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 E150 BKN 70 991/32/28/2713G16/927/ FEW DSNT
CU NE-W/ 8/110 70002 50000 10033 20031

10 A.M.
Weather: Scattered cumulus, scattered altostratus,
broken cirrus
Temperature: 39F; Dew Point: 29F; Wind: WNW at 14G24 kts
Sea-level pressure: 29.29 ins. Hg, rising steadily
Visibility: 50 miles
3-hr Precip: 0.00 ins.
3-hr snowfall: 0.0 ins.
BHO SA 1455 35 SCT 150 SCT E250 BKN 50 916/39/29/2914G24/929/
8/122 51005

1 P.M.
Weather: Broken stratocumulus
Temperature: 38F; Dew Point: 30F; Wind: WNW at 15G25 kts,
Peak wind: 30 mph (26 kts) WNW at 12:44 P.M.
Sea-level pressure: 29.27 ins. Hg, rising steadily
Visibility: 35 miles
6-hr Max temp: 39F
6-hr Min temp: 32F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 E50 BKN 35 913/38/30/2915G25/927/ PK WND
2926/44/ 8/02/ 56003 10039 20032

SUMMARY FOR TUESDAY, NOVEMBER 27, 2018

TEMPERATURE (DEGREES F)
MAX…..45   NORMAL…..46
MIN…..33   NORMAL…..30
MEAN….39   NORMAL…..38

DEPARTURE FROM 30-YEAR NORMAL……………………+1
TOTAL DEPARTURE FOR THE MONTH…………………..-72 [-2.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..26   DEPARTURE………-1
TOTAL HEATING UNITS FOR THE MONTH………….686   DEPARTURE……..+71
TOTAL HEATING UNITS FOR THE SEASON………..1230   DEPARTURE……..+52
TOTAL HEATING UNITS LAST SEASON TO DATE…….887   DIFFERENCE……+343

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..44 ENE AT  1:02 A.M.
AERO…………………….44 ENE AT  1:02 A.M.
ASOS…………………….46 ENE AT  1:05 A.M.
DAVIS……………………46 ENE AT  1:04 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….32 ENE AT 12:40 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….30 ENE AT 12:40 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………31 E   AT 12:40 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..16.7 WSW
ASOS…………………..15.3
DAVIS………………….16.7 W [262 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02  DEPARTURE…….-0.14
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE MONTH………10.32  DEPARTURE…….+6.06
ASOS………….10.76
TOTAL PRECIPITATION FOR THE YEAR……….63.37  DEPARTURE……+15.52
ASOS………….65.63

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE……..-0.1
TOTAL SNOWFALL FOR THE MONTH…………….7.6  DEPARTURE……..+5.8
TOTAL SNOWFALL FOR THE SEASON……………7.6  DEPARTURE……..+5.5

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 Low temp since midnight is 31F; 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 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

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

TODAY’S REPORT PREPARED BY: Benjamin Turner