Thursday, October 17, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, OCTOBER 17, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
VERY WINDY AND OVERCAST FOLLOWING A RECORD
BREAKING STORM….NEW MINIMUM PRESSURE RECORD
FOR OCTOBER SET THIS MORNING…
Today we observed overcast skies with some momentary
breaks. Visibility was limited due to a distant fog,
with the highest of 50 miles being observed to the
east. We measured 1.96 inches of rainfall from last
night’s storm, and a max gust of 60 mph from the E
after midnight, which is a new record for the date.
Wind continues to be strong, with speeds of 30 mph
and a max gust of 55 mph since 7 A.M.
This Nor’easter established a new record minimum
sea-level pressure for the month of October of
28.82 in Hg (975.8 mb), which broke the previous
record of 28.95 in Hg, set on October 25th, 1925.
Overnight, the pressure fell in very rapid fashion
(by almost 50 millibars in 24 hours) as the storm
intensified over New England.
The high so far today is 51F, 9 degrees below the daily
normal maximum of 60F. The low since midnight is 46F,
4 degrees above the normal minimum of 42F.
Today’s Observations:
7 A.M.
Weather: Overcast stratocumulus
Temperature: 47F; Dew Point: 41F; Wind: SW at 19G37 kts,
Peak wind: 47 MPH (41 kts) SW at 6:59 A.M.
Sea-level pressure: 30.07 ins. Hg, rising rapily
Visibility: 50 miles, except 35 WSW-NW due to fog
6-hr Max temp: 60F
6-hr Min temp: 46F
BHO SA 1155 E30 OVC 50 813/47/41/2319G37/897/ DSNT FG
VSBY 35 WSW-NW PRESRR PK WND 2341/59/ 8/4// 53050 10060
20046
10 A.M.
Weather: Overcast stratocumulus
Temperature: 49F; Dew Point: 41F; Wind: SW at 23G32 kts,
Peak wind: 51 MPH (44 kts) SW at 9:08 A.M.
Sea-level pressure: 29.02 ins. Hg, falling then rising
Visibility: 50 miles, except 35 WSW-NW due to fog
3-hr Precip: 0.00 ins.
BHO SA 1455 E30 OVC 50 827/49/41/2423G32/902/ DSNT FG
VSBY 35 WSW-NW PK WND 2344/08/ 8/4// 51014
1 P.M.
Weather: Broken stratocumulus, overcast nimbostratus,
very light rain
Temperature: 50F; Dew Point: 42F; Wind: SW at 21G33 kts,
Peak wind: 53 MPH (46 kts) W at 11:45 A.M.
Sea-level pressure: 29.04 ins. Hg, rising steadily
Visibility: 35 miles, distant fog
6-hr Max temp: 51F
6-hr Min temp: 46F
6-hr Precip: Trace
BHO SA 1755 E30 BKN 60 OVC 35 834/50/42/2321G33/904/ DSNT
FG ALQDS R-CTD PCPN VRY LGT PK WND 2646/1645/ 8/42/ 600//
53007 10051 20046
SUMMARY FOR WEDNESDAY, OCTOBER 16, 2019
TEMPERATURE (DEGREES F)
MAX…..61 NORMAL…..60
MIN…..45 NORMAL…..43
MEAN….53 NORMAL…..51
DEPARTURE FROM 30-YEAR NORMAL…………………+2
TOTAL DEPARTURE FOR THE MONTH…………………+3 [ 0.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………12 DEPARTURE………-2
TOTAL HEATING UNITS FOR THE MONTH…………..171 DEPARTURE………-7
TOTAL HEATING UNITS FOR THE SEASON………….264 DEPARTURE……..-56
TOTAL HEATING UNITS LAST SEASON TO DATE……..219 DEPARTURE……..+45
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……….0
TOTAL COOLING UNITS FOR THE MONTH…………….2 DEPARTURE………-2
TOTAL COOLING UNITS FOR THE SEASON………….682 DEPARTURE……..+81
TOTAL COOLING UNITS LAST SEASON TO DATE……..874 DEPARTURE…….-192
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..58 ESE AT 10:55 P.M.
AERO…………………….58 ESE AT 10:59 P.M.
ASOS…………………….57 ESE AT 11:16 P.M.
DAVIS……………………58 ESE AT 10:54 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….46 ESE AT 10:58 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….43 E AT 10:58 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………47 E AT 10:57 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….15.3 ESE
ASOS…………………….14.5
DAVIS……………………15.3 SE [128 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….1.96 DEPARTURE……+1.81
ASOS…………..2.12
TOTAL PRECIPITATION FOR THE MONTH……….4.62 DEPARTURE……+2.25
ASOS…………..4.88
TOTAL PRECIPITATION FOR THE YEAR……….43.04 DEPARTURE……+1.58
ASOS………….43.11
PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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
10/01 67/52/60/+3/0.06/…/.. 28 SW AERO 25 SSW RMY 29
10/02 74/49/62/+5/0.42/…/.. 30 ENE AERO 25 ENE RMY 28
10/03 51/46/49/-7/…./…/.. 28 ENE AERO 26 ENE RMY N/A
10/04 59/40/50/-6/…./…/.. 38 NNW AERO 38 NNW RMY 38
10/05 58/35/47/-9/0.00/…/.. 21 N AERO 18 SSW RMY N/A
10/06 65/44/55/0/0.00/…/.. 36 SSW AERO 35 SSW RMY N/A
10/07 77/57/67/+12/0.12/…/.. 47 SSW AERO 46 SSW RMY 49
10/08 60/52/56/+2/T/…/.. 22 NE AERO 18 NW RMY N/A
10/09 55/49/52/-2/…./…/.. 43 NE AERO 37 NE RMY 44
10/10 54/47/51/-3/…./…/.. 41 NE AERO 37 NE RMY 42
10/11 52/48/50/-3/…./000/00 41 NE AERO 39 NE RMY 41
10/12 52/49/51/-2/…./…/.. 39 NE AERO 37 NE RMY N/A
10/13 66/48/57/+4/…./…/.. 18 WNW AERO 17 WNW RMY 18
10/14 67/51/59/+7/…./…/.. 18 WSW AERO 17 WSW RMY N/A
10/15 61/43/52/0/…./…/.. 18 NNW AERO 17 NNW RMY N/A
10/16 61/45/53/+2/…./…/.. 58 ESE AERO 58 ESE RMY N/A
10/17 The low since midnight is 46F, normal daily minimum is 42F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 17
HIGH 86F IN 1947
LOW 25F IN 1886
PRECIP 1.87 INCHES IN 1989
SNOWFALL TRACE IN 1970
PEAK GUST 55 MPH NE IN 1964
RECORDS FOR OCTOBER 18
HIGH 82F IN 1908
LOW 26F IN 1939
PRECIP 2.79 INCHES IN 1975
SNOWFALL 3.0 INCHES IN 2009
PEAK GUST 66 MPH S IN 1967
TODAY’S REPORT PREPARED BY: Benjamin Turner
