Thursday, November 14, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, NOVEMBER 14, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
OVERCAST WITH A LIGHT SOUTHERLY WIND
ATOP GREAT BLUE HILL….
Following a record setting day, weather conditions
have been overcast with light winds out of the south.
Visibility was 70 miles on average, despite a distant
haze. The high so far today is 37F, which is 14 degrees
below the normal maximum of 51F. Yesterday’s high was
28F, setting a new low maximum record. This will replace
the last record of 30F in 1920. The low since midnight
is 17F, 17 degrees below the normal minimum of 34F.
PRELIMINARY STATS FOR OCTOBER 2019
TEMPERATURE, Deg. F
Avg. Max. 60.5 [+0.2]
Avg. Min. 46.7 [+3.8]
Mean 53.6 [+2.0]
24-hour corrected mean: 53.3
Max. for month: 77F on the 7th
Min. for month: 35F on the 5th
HEATING DEGREE DAYS
Total heating units: 347 [-74]
Total for the season: 440 [-123]
Total for last season: 543
PRECIPITATION, Inches
Total: 6.92 [+2.23]
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 12.2 mph
Avg. corrected wind speed: 12.6 mph
Prevailing wind direction: NE [13%]
Peak gust and direction: 61 S,E on the 17th, 31st
SUNSHINE:
Campbell-Stokes card minutes: 7074 minutes of possible 19824 or 36%
Astronomical total minutes: 7330 minutes of possible 20566 or 36%
This was the second cloudiest October on record!
BHO Lowest October Sunshine, hours (1886-2019):
1) 80.5 in 1913 [24%] 2) 117.9 in 2019 [36%] 3) 120.3 in 1896 [36%] 4) 121.6 in 1919 [37%] 5) 124.9 in 1888 [38%]
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, broken cirrus,
few cumulus offshore
Temperature: 19F; Dew Point: 6F; Wind: WNW at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.48 ins. Hg, falling then rising
Visibility: 75 miles, thin smoke layer
6-hr Max temp: 19F
6-hr Min temp: 17F
24-hr Precip: 0.00 ins.
24-hr Snowfall: 0.0 ins.
BHO SA 1155 150 SCT E250 BKN 75 323/19/6/3003/048/ FEW
CU OFFSHR THN K LYR ALQDS WND L/V/ 8/122 50003 10019 20017
10 A.M.
Weather: Scattered cumulus, broken altostratus, overcast
cirrus
Temperature: 30F; Dew Point: 16F; Wind: S at 6 kts,
Wind: Light
Sea-level pressure: 30.51 ins. Hg, falling then rising
Visibility: 65 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 50 SCT E150 BKN 250 OVC 65 331/30/16/1706/051/
WND LGT/ 8/822 50008
1 P.M.
Weather: Scattered cumulus, broken altostratus, overcast
cirrus
Temperature: 37F; Dew Point: 25F; Wind: SSE at 9 kts
Sea-level pressure: 30.42 ins. Hg, falling steadily
Visibility: 65 miles
6-hr Max temp: 37F
6-hr Min temp: 19F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT E150 BKN 250 OVC 65 305/37/25/1609/042/ 8/822
58026 10037 20019
SUMMARY FOR WEDNESDAY, NOVEMBER 13, 2019
TEMPERATURE (DEGREES F)
MAX…..28 NORMAL…..51
MIN…..15 NORMAL…..34
MEAN….22 NORMAL…..43
DEPARTURE FROM 30-YEAR NORMAL……………….-21
TOTAL DEPARTURE FOR THE MONTH……………….-59 [-4.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………43 DEPARTURE……..+21
TOTAL HEATING UNITS FOR THE MONTH…………..325 DEPARTURE……..+59
TOTAL HEATING UNITS FOR THE SEASON………….765 DEPARTURE……..-64
TOTAL HEATING UNITS LAST SEASON TO DATE……..777 DEPARTURE……..-12
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..32 WNW AT 11:42 A.M.
AERO…………………….32 WNW AT 11:40 A.M
ASOS…………………….34 W AT 11:14 A.M.
DAVIS……………………35 WNW AT 10:14 A.M. RMY 35
FASTEST MILE FOR YESTERDAY………………….26 WNW AT 12:00 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….25 NW AT 11:56 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………28 WNW AT 12:00 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….14.2 WNW
ASOS…………………….14.1
DAVIS……………………14.5 WNW [303 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.72 DEPARTURE……-1.24
ASOS…………..0.74
TOTAL PRECIPITATION FOR THE YEAR……….46.06 DEPARTURE……+0.32
ASOS………….46.21
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.1 DEPARTURE…….-0.0
TOTAL SNOWFALL FOR THE MONTH…………….0.1 DEPARTURE…….-0.7
TOTAL SNOWFALL FOR THE SEASON……………0.1 DEPARTURE…….-1.0
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/+3/0.06/028/04 28 SW AERO 25 SSW RMY 29
10/02 74/49/62/+5/0.42/021/03 30 ENE AERO 25 ENE RMY 28
10/03 51/46/49/-7/…./000/00 28 ENE AERO 26 ENE RMY N/A
10/04 59/40/50/-6/…./397/57 38 NNW AERO 38 NNW RMY 38
10/05 58/35/47/-9/0.00/687/99 21 N AERO 18 SSW RMY N/A
10/06 65/44/55/0/0.00/263/38 36 SSW AERO 35 SSW RMY N/A
10/07 77/57/67/+12/0.12/316/46 47 SSW AERO 46 SSW RMY 49
10/08 60/52/56/+2/T/000/00 22 NE AERO 18 NW RMY N/A
10/09 55/49/52/-2/…./000/00 43 NE AERO 37 NE RMY 44
10/10 54/47/51/-3/…./000/00 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/…./000/00 39 NE AERO 37 NE RMY N/A
10/13 66/48/57/+4/…./570/85 18 WNW AERO 17 WNW RMY 18
10/14 67/51/59/+7/…./335/50 18 WSW AERO 17 WSW RMY N/A
10/15 61/43/52/0/…./653/98 18 NNW AERO 17 NNW RMY N/A
10/16 61/45/53/+2/…./305/46 58 ESE AERO 58 ESE RMY N/A
10/17 60/46/53/+2/…./086/13 61 E AERO 63 E RMY N/A
10/18 57/41/49/-2/…./099/15 29 WNW AERO 32 W RMY 32
10/19 58/36/47/-3/…./648/99 18 NW AERO 18 NW RMY 19
10/20 60/43/52/+2/T/280/43 14 NE AERO 16 NE RMY N/A
10/21 59/49/54/+4/0.01/591/91 25 E AERO 21 NE RMY 23
10/22 58/47/53/+4/…./078/12 29 E AERO 28 E RMY 23
10/23 65/48/57/+8/…./431/67 35 W AERO 35 W RMY 36
10/24 67/43/55/+6/…/635/99 28 SSW AERO 28 SSW RMY 29
10/25 64/47/56/+7/…/217/34 20 WSW AERO 21 SW RMY N/A
10/26 58/45/52/+4/…/502/79 20 N AERO 18 N RMY N/A
10/27 52/45/49/+1/1.43/000/00 37 ESE AERO 35 ESE RMY 37
10/28 53/46/50/+2/…/050/08 24 NNW AERO 24 NNW RMY N/A
10/29 54/47/51/+4/…./000/00 15 ESE AERO 15 ESE RMY 14
10/30 65/51/58/+11/…./138/22 24 S AERO M M RMY N/A
10/31 68/58/63/+16/…./000/00 61 S AERO M M RMY N/A
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/…/.. 67 S AERO M M RMY N/A
11/02 50/31/41/-5/0.00/0.0/…/.. 17 WNW AERO 14 W RMY N/A
11/03 53/35/44/-2/0.00/0.0/…/.. 25 WSW AERO 23 W RMY 26
11/04 53/33/43/-2/0.00/0.0/…/.. 24 S AERO 20 S RMY 24
11/05 54/44/49/+4/0.33/0.0/…/.. 22 S AERO 18 WNW RMY 28
11/06 51/36/44/-1/0.00/0.0/…/.. 28 WSW AERO 23 W RMY 27
11/07 55/38/47/+2/0.27/0.0/…/.. 30 S AERO 26 SSW RMY 32
11/08 38/23/31/-13/0.00/0.0/…/.. 38 NW AERO 37 WNW RMY 44
11/09 39/20/30/-14/0.00/0.0/…/.. 22 S AERO 18 S RMY N/A
11/10 51/30/41/-3/0.00/0.0/…/.. 30 SW AERO 30 SW RMY 31
11/11 52/39/46/+3/T/0.0/…/.. 23 NE AERO 22 NE RMY 23
11/12 42/20/31/-12/0.08/0.1/…/.. 37 WNW AERO 37 WNW RMY 41
11/13 28/15/22/-21/0.00/0.0/…/.. 32 WNW AERO 32 WNW RMY 35
11/14 The low since midnight is 17F, daily normal minimum is 34F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR NOVEMBER 14
HIGH 70 IN 1993
LOW 11 IN 1905
PRECIP 2.08 INCHES IN 2009
SNOWFALL 3.5 IN 1997, 2014
PEAK GUST 63 W IN 2003
RECORDS FOR NOVEMBER 15
HIGH 74 IN 1993
LOW 15 IN 1933
PRECIP 1.66 INCHES IN 1981
SNOWFALL 4.0 IN 1967
PEAK GUST 65 SSE IN 2008
TODAY’S REPORT PREPARED BY: Benjamin Turner
