Thursday, October 1, 2020
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, OCTOBER 1, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME
CLEARER THIS MORNING BECOMING MOSTLY
CLOUDY IN THE AFTERNOON HOURS….
Following an eventful day wind-wise, the observatory
was relatively quiet today. Clouds were very few this
morning, increasing to almost overcast in the afternoon
hours. Wind has stayed tame, at barely 15 mph from the
south. The max wind as of yet is 27 mph. Pressure is
steady for the most part, dropping ever so slightly
after noontime.
Despite some late-month rainfall, we are still under the
influence of a severe drought, with some parts of the
region in extreme drought. The rainfall total for
September is 1.61 inches, but this is still 2.45 inches
below normal. For the year to date, we are still more
than 4.50″ below normal.
The high so far today is 74F, 8 degrees above the daily
normal max of 66F. The low since midnight is 56F, which
is 7 degrees above the normal low of 49F.
Today’s Observations:
7 A.M.
Weather: Few altostratus
Temperature: 58F; Dew Point: 53F; Relative Humidity: 82%
Wind: SSW at 13 kts
Sea-level pressure: 29.88 ins. Hg: falling, then rising
Visibility: 65 miles
6-hr Max temp: 58F
6-hr Min temp: 56F
24-hr Precip: 0.11 ins.
BHO SA 1155 CLR 65 118/58/53/2013/988/ FEW AS ALQDS/ 8/020 50000
10058 20056
10 A.M.
Weather: Scattered altocumulus and cirrostratus
Temperature: 70F; Dew Point: 53F; Relative Humidity: 54%
Wind: S at 10G16 kts
Sea-level pressure: 29.89 ins. Hg: rising, then more slowly
Visibility: 75 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 110 SCT 250 SCT 75 120/70/53/1810G16/989/ 8/058 51002
1 P.M.
Weather: Broken cumulus/stratocumulus and altocumulus
Temperature: 71F; Dew Point: 55F; Relative Humidity: 56%
Wind: S at 8 kts
Sea-level pressure: 29.87 ins. Hg: falling steadily
Visibility: 75 miles
6-hr Max temp: 74F
6-hr Min temp: 58F
6-hr Precip: 0.00 ins.
BHO SA 1755 55 BKN 80 BKN 75 112/71/55/1908/987/ 8/850 58006
10074 20058
SUMMARY FOR WEDNESDAY, SEPTEMBER 30, 2020
TEMPERATURE (DEGREES F)
MAX…..72 NORMAL…..67
MIN…..56 NORMAL…..49
MEAN….64 NORMAL…..58
DEPARTURE FROM 30-YEAR NORMAL…………….+6
TOTAL DEPARTURE FOR THE MONTH…………….+33 [+0.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………. 1 DEPARTURE….. -7
TOTAL HEATING UNITS FOR THE MONTH………….95 DEPARTURE…..-15
TOTAL HEATING UNITS FOR THE SEASON…………98 DEPARTURE…..-37
TOTAL HEATING UNITS LAST SEASON TO DATE…….93 DEPARTURE…..+13
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………. 4 DEPARTURE….. -1
TOTAL COOLING UNITS FOR THE MONTH………… 73 DEPARTURE…..+13
TOTAL COOLING UNITS FOR THE SEASON………..830 DEPARTURE….+233
TOTAL COOLING UNITS LAST SEASON TO DATE……680 DEPARTURE….+150
PEAK WIND GUST FOR YESTERDAY (MPH)
420C/Official…………….71 S AT 6:48 A.M.
AERO…………………….88 S AT 6:44 A.M.
ASOS…………………….72 S AT 6:39 A.M.
DAVIS……………………71 S AT 6:39 A.M.
RMY N/A MERLIN N/A
FASTEST MILE FOR YESTERDAY………………….52 S AT 5:52 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….47 S AT 6:50 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………46 S AT 5:48 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..20.8 S (500 total miles)
ASOS…………………..19.5
DAVIS………………….19.7 SW [221 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.11 DEPARTURE….-0.04
ASOS…………..0.10
TOTAL PRECIPITATION FOR THE MONTH……….1.61 DEPARTURE….-2.45
ASOS…………..1.64
TOTAL PRECIPITATION FOR THE YEAR……….34.42 DEPARTURE….-4.66
ASOS………….35.22
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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
09/01 76/59/68/0/0.00/698/88 22 SSE AERO 21 SE RMY 20
09/02 69/59/64/-4/0.18/102/13 23 SSE AERO 23 SSE RMY 24
09/03 75/66/71/+4/0.04/000/00 22 SSW AERO 21 SSW RMY N/A
09/04 82/62/72/+5/0.00/763/98 26 WNW AERO 26 WNW RMY 25
09/05 76/55/66/-1/0.00/760/98 25 W AERO 25 W RMY 24
09/06 78/58/68/+1/0.00/356/46 24 W AERO 24 W RMY N/A
09/07 79/61/70/+4/0.00/632/82 27 SSE AERO 30 SSE RMY 28
09/08 82/61/72/+6/0.00/545/71 17 S AERO 16 S RMY 17
09/09 80/62/71/+5/0.00/214/28 16 S AERO 15 S RMY 16
09/10 81/69/75/+10/0.28/015/02 21 SSW AERO 21 SSW RMY N/A
09/11 72/55/64/-1/0.01/152/20 25 N AERO 25 N RMY N/A
09/12 68/51/60/-5/0.00/666/88 21 ENE AERO 21 ENE RMY 21
09/13 74/53/64/0/0.00/611/81 26 SSW AERO 26 SSW RMY 26
09/14 74/50/62/-2/0.00/511/68 29 NNW AERO 33 NNW RMY 30
09/15 64/44/54/-10/0.00/583/78 18 S AERO 18 S RMY N/A
09/16 72/49/61/-2/0.00/603/81 31 SSW AERO 31 SSW RMY 31
09/17 76/57/67/+4/0.00/453/61 26 WSW AERO 28 W RMY N/A
09/18 64/48/56/-6/0.00/163/22 28 NE AERO 30 NNW RMY N/A
09/19 59/42/51/-11/0.00/722/98 23 N AERO 23 N RMY N/A
09/20 58/40/49/-13/0.00/602/82 25 NE AERO 25 NE RMY 27
09/21 61/41/51/-10/0.00/…/.. 29 NE AERO 27 NE RMY 29
09/22 63/39/51/-10/0.00/…/.. 28 NNW AERO 30 NNW RMY 29
09/23 78/50/64/+4/0.00/…/.. 31 NW AERO 32 WNW RMY 32
09/24 76/57/67/+7/0.00/…/.. 20 SW AERO 18 WSW RMY 19
09/25 77/57/67/+7/0.00/…/.. 18 ENE AERO 18 WSW RMY N/A
09/26 77/57/67/+8/0.00/…/.. 21 S AERO 21 S RMY 21
09/27 79/64/72/+13/0.01/…/.. 24 S AERO 25 S RMY 24
09/28 78/64/71/+13/0.07/…/.. 24 SSE AERO 24 S RMY 25
09/29 76/62/69/+11/0.01/…/.. 30 S AERO 30 S RMY N/A
09/30 72/56/64/+6/1/1.01/…/.. 71 S AERO 88 S RMY N/A
10/01 The low since midnight is 61F, the daily normal low is 49F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 1
HIGH 85F IN 1927
LOW 30F IN 1992
PRECIP 1.63 INCHES IN 2014
PEAK GUST 68e MPH SSE IN 1977
RECORDS FOR OCTOBER 2
HIGH 85F IN 1968
LOW 29F IN 1899
PRECIP 1.75 INCHES IN 1984
PEAK GUST 52e MPH S IN 1952, 52 NNW IN 1984
TODAY’S REPORT PREPARED BY: Benjamin Turner
