Sunday, October 3, 2021

| October 3, 2021 | Reply

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

SUNDAY, OCTOBER 3RD, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0544E
SUNSET:  1722E

MOSTLY CLOUDY WITH LIMITED VISIBILITY….

We observed mostly cloudy skies for the majority of the
day. Visibility went from a 1/2 mile in fog this morning to
45 miles this afternoon.

Wind is easterly and light at an average of 5 mph, and a peak
gust so far of 14 mph.

Last month ended off a degree above average with a rain surplus
of 2.58 inches.

The high so far today is 65F, a degree below the normal
max of 66F. The low since midnight is 55F, 6 degrees above

the normal low of 49F.

PRELIMINARY STATS FOR SEPTEMBER 2021

TEMPERATURE, Deg. F
Avg. Max. 73.2 [+0.5]
Avg. Min. 57.4 [+1.8]
Mean      65.3 [+1.1]
24-hour corrected mean: 64.8
Max. for month: 82F on the 15th
Min. for month: 45F on the 29th

HEATING DEGREE DAYS
Total heating units:     46 [-54]
Total for the season:    74 [+25]
Total for last season:   98

COOLING DEGREE DAYS
Total cooling units:      62 [-12]
Total for the season:    712 [+42]
Total for last season:   830

PRECIPITATION, Inches
Total: 6.64 [+2.58]
Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed:  10.5 mph
Avg. corrected wind speed:    10.7 mph
Prevailing wind direction:   NW [11%]
Peak gust and direction:     43 ENE on the 2nd

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes: N/A


Today’s Observations:

7 A.M.
Weather: Fog, 300 feet vertical visibility
Temperature: 58F; Dew Point: 58F; Relative Humidity: 100%
Wind: ENE @ 7 kts
Sea-level pressure: 1015.6 mb; 29.99 in. Hg: rising, rising then
falling
Visibility: 1/2 mile, fog  
6-hr Max temp: 59F
6-hr Min temp: 55F
24-hr Precip: 0.00 ins.
BHO SA 1155 X W3 1/2F 156/58/58/0707/999/ 8//// 55001 10059 20055

10 A.M.
Weather: Overcast stratus
Temperature: 61F; Dew Point: 59F; Relative Humidity: 94%
Wind: ENE @ 4 kts, light and variable
Sea-level pressure: 1016.2 mb; 30.01 in Hg; rising then more
slowly
Visibility: 30 miles, thin fog
3-hr Precip: 0.00 ins.
BHO SA 1455 10 OVC 30 162/61/59/0604/001/ THN F ALQDS WND L/V/
8/6// 51006

1 P.M.
Weather: Scattered stratocumulus, broken altocumulus
Temperature: 65F, Dew point: 59F; Relative Humidity: 81%
Wind: ESE @ 5 kts, wind light
Sea-level pressure: 1014.7 mb; 29.96 in Hg; steady then falling
Visibility: 45 miles
6-hr Max temp: 65F
6-hr Min temp: 57F
6-hr Precip: 0.00 ins.
BHO SA 1755 20 SCT 100 BKN 45 147/65/59/1105/996/ WND LGT/ 8/870
58015 10065 20057

SUMMARY FOR SATURDAY, OCTOBER 2, 2021

TEMPERATURE (DEGREES F)
MAX…….73     NORMAL…..66
MIN…….47     NORMAL…..49
MEAN……60     NORMAL…..58

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………. +2
TOTAL DEPARTURE FOR THE MONTH……………………. -2 [-1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….5  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH……………16  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE SEASON…………..90  DEPARTURE…….-43
TOTAL HEATING UNITS LAST SEASON TO DATE……..107  DEPARTURE…….-17

COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH…………….0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE SEASON………….712  DEPARTURE…….+40
TOTAL COOLING UNITS LAST SEASON TO DATE……..831  DEPARTURE……-119

PEAK WIND GUST (MPH):
                     Official……………….24 WSW @  2:03 P.M.
                     AEROVANE (south tower)…..23 WSW @  2:15 P.M.
                     VECTOR #2 (south tower)….25     @ 12:53 P.M.
                     DAVIS #2 (south tower)…..24 WSW @  2:03 P.M.
                     ASOS………..OUT OF SERVICE D/T RENOVATIONS
                     VECTOR #1……OUT OF SERVICE D/T RENOVATIONS
                     DAVIS #1…….OUT OF SERVICE D/T RENOVATIONS
                     RMY…………OUT OF SERVICE D/T RENOVATIONS  
                     MERLIN………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 WSW  @  2:03 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18      @  2:04 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 WSW  @  2:04 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE…….OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS
MAXIMUM 2-MINUTE RMY AVERAGE……..OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL……..10.8 WSW [260 total miles]
                     VECTOR #2………………11.7
                     DAVIS #2……………….11.8 WSW
                     RMY……………..OUT OF SERVICE D/T RENOVATIONS
                     ASOS…………….OUT OF SERVICE D/T RENOVATIONS
                     VECTOR #1………..OUT OF SERVICE D/T RENOVATIONS
                     DAVIS #1…………OUT OF SERVICE D/T RENOVATIONS   

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….0.00  DEPARTURE….-0.17
TOTAL PRECIPITATION FOR THE MONTH………….0.00  DEPARTURE….-0.34
TOTAL PRECIPITATION FOR THE YEAR………….46.98  DEPARTURE….+8.23

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   68/56/62/-7/1.47/000/00          34 NNE AERO 37 NNE RMY N/A    
09/02   71/55/63/-6/2.53/322/41          49 ENE AERO 52 ENE RMY N/A
09/03   72/52/62/-6/0.00/735/94          23 NW  AERO 23 NW  RMY N/A
09/04   76/55/66/-2/0.00/757/97          22 WNW AERO 21 WNW RMY N/A
09/05   72/60/66/-2/0.04/008/01          27 S   AERO 29 S   RMY N/A
09/06   80/61/71/+3/0.00/557/72          24 WNW AERO 25 WNW RMY N/A
09/07   78/57/68/+1/0.00/732/95          23 WSW AERO 22 WSW RMY N/A
09/08   81/61/71/+4/0.00/646/84          43 S   AERO 45 S   RMY N/A
09/09   71/64/68/+1/0.90/000/00          33 S   AERO 36 S   RMY N/A
09/10   74/55/65/-1/0.04/595/78          31 NW  AERO 32 WNW RMY N/A
09/11   75/51/63/-3/0.00/730/96          24 SW  AERO 24 SW  RMY N/A
09/12   79/60/70/+4/0.00/591/78          33 SW  AERO 32 SW  RMY N/A
09/13   77/62/70/+5/0.06/559/74          22 NW  AERO 23 NW  RMY N/A
09/14   75/59/67/+2/0.00/444/59          23 S   AERO 25 S   RMY N/A
09/15   82/65/74/+9/T/539/72             32 SSW AERO 35 SSW RMY N/A
09/16   69/61/65/+1/0.27/037/05          24 ENE AERO 24 ENE RMY N/A TSTM      
09/17   66/60/63/-1/0.02/000/00          22 NE  AERO 23 NE  RMY N/A
09/18   74/62/68/+5/0.04/207/28          17 WNW AERO 18 WNW RMY N/A TSTM
09/19   71/57/64/+1/0.15/619/84          23 NNE AERO 24 NNE RMY N/A
09/20   71/55/63/0/0.00/588/80           20 SE  AERO 20 SE  RMY N/A
09/21   75/55/65/+3/0.00/…/..          19 SSE AERO 20 SSE RMY N/A
09/22   75/65/70/+8/0.02/…/..          30 S   AERO 30 S   RMY N/A
09/23   78/65/72/+10/0.08/…/..         36 SSE AERO 37 SSE RMY N/A
09/24   75/62/69/+8/0.02/…/..          43 SSE AERO 45 SSE RMY N/A
09/25   74/59/67/+6/0.02/…/..          14 N   AERO 14 NNW RMY N/A
09/26   73/54/64/+4/0.57/…/..          33 WNW AERO 32 WNW RMY N/A
09/27   73/52/63/+3/T/…/..             30 SW  AERO 30 SW  RMY N/A
09/28   67/52/60/+1/0.40/…/..          27 SSW AERO 25 SSW RMY N/A TSTM
09/29   63/45/54/-5/0.00/…/..          25 NNW AERO 25 NNW RMY N/A
09/30   60/46/53/-6/…/…/..           22 NNW AERO 21 NNW 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   64/44/54/-4/…./…/..          20 WNW AERO 20 WNW RMY N/A
10/02   73/47/60/+2/…./…/..          24 WSW AERO 23 WSW RMY N/A

10/03   The low since midnight is 55F, 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 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

Category: Daily Discussions

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