Saturday, October 3, 2020
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, OCTOBER 3, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME
PARTLY CLOUDY AND COOL TODAY WITH NEARLY DEAD
WIND BETWEEN OBSERVATIONS….
Today we observed an excellent visibility of 80 miles on
average under partly cloudy skies. Conditions are dry,
with dew points in the low 40’s, and a humidity of 52%
by the 1 P.M. observation. Wind was westerly, being
calm between 10 A.M. and 11 A.M. The max gust so far
today is only 14 mph.
Some very nice fall weather is upon us, and we are open
for rooftop tours until 4 P.M. It’s currently $3 for
adults and 1$ each for children.
The drought monitor was updated on Thursday revealing yet
another escalation. 55% of MA now in a “severe drought”
and 29% considered in an “extreme drought” (approximately
Boston to Providence and points south and east).
-Drought section written by Andrew Swanson
The high so far today is 65F, the same as the daily
normal. The low since midnight is 45F, which
is 3 degrees below the normal low of 48F.
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 48F; Dew Point: 44F; Relative Humidity: 86%
Wind: WSW at 7 kts
Sea-level pressure: 30.15 ins. Hg: steady, then rising
Visibility: 75 miles
6-hr Max temp: 58F
6-hr Min temp: 45F
24-hr Precip: 0.02 ins.
BHO SA 1155 120 SCT 250 SCT 75 211/48/44/3307/015/ 8/052
70002 53015 10058 20045
10 A.M.
Weather: Scattered cumulus, broken altocumulus and cirrus
Temperature: 59F; Dew Point: 47F; Relative Humidity: 64%
Wind: W at 4 kts (wind light and variable)
Sea-level pressure: 30.19 ins. Hg: falling, then rising
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 35 SCT 120 BKN 250 BKN 80 223/59/47/2704/019/
WND L/V/ 8/152 51012
1 P.M.
Weather: Broken cumulus
Temperature: 52F; Dew Point: 45F; Relative Humidity: 52%
Wind: WSW at 7 kts
Sea-level pressure: 30.16 ins. Hg: rising, then falling
Visibility: 80 miles
6-hr Max temp: 65F
6-hr Min temp: 48F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 BKN 80 214/52/45/2507/016/ 8/100 58009 10065
20048
SUMMARY FOR FRIDAY, OCTOBER 2, 2020
TEMPERATURE (DEGREES F)
MAX…..63 NORMAL…..66
MIN…..49 NORMAL…..49
MEAN….56 NORMAL…..57
DEPARTURE FROM 30-YEAR NORMAL……………..-1
TOTAL DEPARTURE FOR THE MONTH……………..+8 [+3.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………. 9 DEPARTURE….. 0
TOTAL HEATING UNITS FOR THE MONTH…………..9 DEPARTURE….. -8
TOTAL HEATING UNITS FOR THE SEASON………..107 DEPARTURE…..-52
TOTAL HEATING UNITS LAST SEASON TO DATE……101 DEPARTURE…….6
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………. 0 DEPARTURE……-1
TOTAL COOLING UNITS FOR THE MONTH…………. 1 DEPARTURE….. 0
TOTAL COOLING UNITS FOR THE SEASON………..831 DEPARTURE….+233
TOTAL COOLING UNITS LAST SEASON TO DATE……680 DEPARTURE….+151
PEAK WIND GUST FOR YESTERDAY (MPH)
420C/Official…………….20 NW AT 11:10 A.M.
AERO…………………….21 NW AT 10:58 A.M.
ASOS…………………….20 NW AT 11:08 A.M.
DAVIS……………………20 WNW AT 11:11 A.M.
RMY 20 MERLIN 20
FASTEST MILE FOR YESTERDAY………………….15 NW AT 11:11 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 NW AT 11:12 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………16 NW AT 11:12 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.3 WNW (176 total miles)
ASOS…………………..7.7
DAVIS………………….7.8 WNW [301 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02 DEPARTURE….-0.13
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE MONTH……….0.02 DEPARTURE….-0.29
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE YEAR……….34.45 DEPARTURE….-4.94
ASOS………….35.23
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/+6/1.01/…/.. 71 S AERO 88 S RMY N/A
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 75/56/66/+9/0.00/…/.. 28 SW AERO 28 SW RMY N/A
10/02 63/49/56/-1/0.02/…/.. 20 NW AERO 21 NW RMY 20
10/03 The low since midnight is 45F, the daily normal low is 48F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 3
HIGH 82F IN 1922
LOW 28F IN 1899
PRECIP 1.76 INCHES IN 1979
PEAK GUST 62 MPH WNW IN 1964
RECORDS FOR OCTOBER 4
HIGH 84F IN 2007
LOW 28F IN 1888
PRECIP 1.87 INCHES IN 2011
PEAK GUST 59 MPH SSW IN 1990
TODAY’S REPORT PREPARED BY: Benjamin Turner
