Thursday, September 23, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, SEPTEMBER 23, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0533E
SUNSET: 1739E
CLOUDY WITH SOME MORE RAINFALL AROUND NOON….
Today we observed mostly cloudy skies and a max visibility of
35 miles. Wind was a factor today, with an average speed above
15 mph and a max gust of almost 30 mph. The wind is still from
the south like yesterday.
A couple quick rain showers occurred around noon, amounting to
0.08 inches.
The monthly rain total is 5.54 inches, 2.68 inches above normal.
The annual total is 45.88 inches, 8.67 inches above the normal
rain total for this time of year.
The high so far today is 76F, 6 degrees above the normal max of
70F. The low since midnight is 65F, 12 degrees above the normal
low of 53F.
Today’s Observations:
7 A.M.
Weather: Scattered stratocumulus, broken altocumulus
Temperature: 67F; Dew Point: 67F; Relative Humidity: 98%
Wind: SSE @ 13G20 kts
Sea-level pressure: 1019.4 mb; 30.10 in. Hg; rising unsteadily
Visibility: 15 miles, thin fog
6-hr Max temp: 67F
6-hr Min temp: 65F
24-hr Precip: 0.02 ins.
BHO SA 1155 30 SCT 70 BKN 15 194/67/67/1513G20/010/ THN F ALQDS/ 8/150
52001 70002 10067 20065
10 A.M.
Weather: Scattered cumulus, broken altocumulus
Temperature: 74F; Dew Point: 66F; Relative Humidity: 76%
Wind: SSE @ 11G22 kts
Sea-level pressure: 1019.6 mb; 30.11 in Hg; rising unsteadily
Visibility: 30 miles, virga in all directions
3-hr Precip: 0.00 ins.
BHO SA 1455 30 SCT 70 BKN 30 196/74/66/1511G22/011/ VIRGA ALQDS/
8/270 52002
1 P.M.
Weather: Scattered cumulus and altocumulus
Temperature: 75F, Dew point: 67F; Relative Humidity: 77%
Wind: SSE @ 16G26 kts
Sea-level pressure: 1018.9 mb; 30.09 in Hg; rising then falling
Visibility: 35 miles, hazy
6-hr Max temp: 76F
6-hr Min temp: 67F
6-hr Precip: 0.09 ins.
BHO SA 1755 40 SCT 70 SCT 35 189/75/67/1616G26/009/ HAZY/ 8/270 55007
6008/ 10076 20067
SUMMARY FOR WEDNESDAY, SEPTEMBER 22, 2021
TEMPERATURE (DEGREES F)
MAX…….75 NORMAL…..70
MIN…….65 NORMAL…..53
MEAN……70 NORMAL…..62
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………….+8
TOTAL DEPARTURE FOR THE MONTH…………………….+19 [+0.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH……………15 DEPARTURE…….-37
TOTAL HEATING UNITS FOR THE SEASON…………..43 DEPARTURE…….-27
TOTAL HEATING UNITS LAST SEASON TO DATE………82 DEPARTURE…….-53
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….5 DEPARTURE……..+3
TOTAL COOLING UNITS FOR THE MONTH……………49 DEPARTURE…….-17
TOTAL COOLING UNITS FOR THE SEASON………….699 DEPARTURE…….+37
TOTAL COOLING UNITS LAST SEASON TO DATE……..807 DEPARTURE……-108
PEAK WIND GUST (MPH):
Official……………….30 S @ 11:49 P.M.
AEROVANE (south tower)…..30 S @ 11:50 P.M.
VECTOR #2 (south tower)….33 @ 11:49 P.M.
DAVIS #2 (south tower)…..34 S @ 11:49 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………………23 S @ 11:50 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23 @ 11:49 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 S @ 11:50 A.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…….14.4 SSE [345 total miles]
VECTOR #2……………..14.5
DAVIS #2………………14.6 S
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…….0.02 DEPARTURE….-0.13
TOTAL PRECIPITATION FOR THE MONTH………….5.54 DEPARTURE….+2.68
TOTAL PRECIPITATION FOR THE YEAR………….45.88 DEPARTURE….+8.67
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/…/.. 24 WNW AERO 25 WNW RMY N/A
09/07 78/57/68/+1/0.00/…/.. 23 WSW AERO 22 WSW RMY N/A
09/08 81/61/71/+4/0.00/…/.. 43 S AERO 45 S RMY N/A
09/09 71/64/68/+1/0.90/…/.. 33 S AERO 36 S RMY N/A
09/10 74/55/65/-1/0.04/…/.. 31 NW AERO 32 WNW RMY N/A
09/11 75/51/63/-3/0.00/…/.. 24 SW AERO 24 SW RMY N/A
09/12 79/60/70/+4/0.00/…/.. 33 SW AERO 32 SW RMY N/A
09/13 77/62/70/+5/0.06/…/.. 22 NW AERO 23 NW RMY N/A
09/14 75/59/67/+2/0.00/…/.. 23 S AERO 25 S RMY N/A
09/15 82/65/74/+9/T/…/.. 32 SSW AERO 35 SSW RMY N/A
09/16 69/61/65/+1/0.27/…/.. 24 ENE AERO 24 ENE RMY N/A TSTM
09/17 66/60/63/-1/0.02/…/.. 22 NE AERO 23 NE RMY N/A
09/18 74/62/68/+5/0.04/…/.. 17 WNW AERO 18 WNW RMY N/A TSTM
09/19 71/57/64/+1/0.15/…/.. 23 NNE AERO 24 NNE RMY N/A
09/20 71/55/63/0/0.00/…/.. 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/…./…/.. 30 S AERO 30 S RMY N/A
09/23 The low since midnight is 65F, the daily normal low is 53F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR SEPTEMBER 23
HIGH 93F IN 1895,1914
LOW 33F IN 1904
PRECIP 2.67 INCHES IN 1994
PEAK GUST 62 MPH SSW IN 1989
RECORDS FOR SEPTEMBER 24
HIGH 87F IN 1959
LOW 33F IN 1885,1950,1963
PRECIP 1.19 INCHES IN 1955
PEAK GUST 54e MPH SW IN 1940
TODAY’S REPORT PREPARED BY: Benjamin Turner
