Sunday, November 7, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, NOVEMBER 7, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0625E
SUNSET: 1630E
PARTLY CLOUDY WITH GREAT VISIBILITY ATOP GREAT BLUE HILL….
We observed another fair weather day with light and variable wind.
Skies were partly cloudy with most of them being seen overhead or
south of the observatory. Visibility was excellent, with a max of
85 miles being seen at the 7 A.M. observation.
Pressure is dropping as the high pressure center is moving
out of the region. There was a drop of over 3 millibars during the
observation period.
The high so far today is 55F, 2 degrees above the normal max of
53F. The low since midnight is 37F, a degree above the normal low
of 36F.
PRELIMINARY STATS FOR OCTOBER 2021
TEMPERATURE, Deg. F
Avg. Max. 64.1 [+3.1]
Avg. Min. 49.4 [+5.4]
Mean 56.9 [+4.3]
24-hour corrected mean: 56.3
Max. for month: 75F on the 13th
Min. for month: 37F on the 24th
HEATING DEGREE DAYS
Total heating units: 253 [-67]
Total for the season: 327 [-185]
Total for last season: 452
COOLING DEGREE DAYS
Total cooling units: 3 [-4]
Total for the season: 717 [-114]
Total for last season: 831
PRECIPITATION, Inches
Total: 7.87 [+2.38]
Greatest in 24 hrs: 2.23 inches on the 26th-27th
WIND, mph
Avg. uncorrected wind speed: 10.9 mph
Avg. corrected wind speed: 11.4 mph
Prevailing wind direction: WNW [10%]
Peak gust and direction: 66 NNE on the 27th
SUNSHINE:
Campbell-Stokes card minutes: 10494 minutes of a possible 19824 or 53%
Astronomical total minutes: 10865 minutes of a possible 20522 or 53%
Today’s Observations:
7 A.M.
Weather: Clear (few distant altocumulus E-S, few distant cirrocumulus
E-S-SW)
Temperature: 38F; Dew Point: 27F; Relative Humidity: 63%
Wind: W @ 6 kts, wind light
Sea-level pressure: 1023.9 mb; 30.24 in. Hg: rising then falling
Visibility: 85 miles
6-hr Max temp: 39F
6-hr Min temp: 37F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 85 239/38/27/2706/024/ FEW AC E-S FEW CC E-S-SW
WND LGT/ 8/059 55002 10039 20037
10 A.M.
Weather: Scattered cirrus
Temperature: 47F; Dew Point: 31F; Relative Humidity: 53%
Wind: SSW @ 3 kts (wind light and variable)
Sea-level pressure: 1023.7 mb; 30.23 in Hg; steady then falling
Visibility: 80 miles, thin smoke layer
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 80 237/47/31/2003/023/ THN K LYR ALQDS WND L/V/
8/004 58002
1 P.M.
Weather: Scattered cirrus
Temperature: 54F, Dew point: 28F; Relative Humidity: 36%
Wind: WNW @ 4 kts, (wind light and variable)
Sea-level pressure: 1020.9 mb; 30.17 in Hg; falling unsteadily
Visibility: 80 miles
6-hr Max temp: 55F
6-hr Min temp: 37F
6-hr Precip: 0.00 ins.
BHO SA 1755 250 SCT 80 209/54/28/3004/017/ WND L/V/ 8/001 57028 10055 20037
SUMMARY FOR SATURDAY, NOVEMBER 6, 2021
TEMPERATURE (DEGREES F)
MAX…….51 NORMAL…..54
MIN…….34 NORMAL…..37
MEAN……43 NORMAL…..45
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………… -2
TOTAL DEPARTURE FOR THE MONTH……………………… -12 [-2.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………22 DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH…………..125 DEPARTURE…….+11
TOTAL HEATING UNITS FOR THE SEASON………….452 DEPARTURE……-174
TOTAL HEATING UNITS LAST SEASON TO DATE……..562 DEPARTURE……-110
PEAK WIND GUST (MPH):
Official (1-SEC AVG)…….18 SSW @ 8:24 P.M.
AEROVANE……………….17 SW @ 9:42 P.M.
VECTOR #2 (Instantaneous)..19 @ 8:24 P.M.
DAVIS #2 ………………18 SW @ 9:16 P.M.
RMY #2 (Instantaneous)…..19 SSW @ 8:22 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 #1………OUT OF SERVICE D/T RENOVATIONS
MERLIN………OUT OF SERVICE D/T RENOVATIONS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 SW @ 8:24 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 @ 9:43 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 WSW @ 9:43 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 WSW @ 9:42 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 #1 AVERAGE…..OUT OF SERVICE D/T RENOVATIONS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……. 6.4 SW [153 total miles]
VECTOR #2…………….. 7.3
DAVIS #2……………… 6.8 WSW
RMY #2……………….. 7.2 W
RMY #1…………..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…..-0.15
TOTAL PRECIPITATION FOR THE MONTH………….0.00 DEPARTURE…..-0.89
TOTAL PRECIPITATION FOR THE YEAR………….54.85 DEPARTURE….+10.06
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0 DEPARTURE……-0.0
TOTAL SNOWFALL FOR THE MONTH……………….0.0 DEPARTURE……-0.2
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……0.0 DEPARTURE……-0.9
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/-4/0.00/583/83 20 WNW AERO 20 WNW RMY N/A
10/02 73/47/60/+2/0.00/567/81 24 WSW AERO 23 WSW RMY N/A
10/03 65/55/60/+3/0.09/070/10 19 E AERO 19 E RMY N/A
10/04 59/51/55/-2/1.69/000/00 30 E AERO 30 E RMY N/A
10/05 58/50/54/-3/0.30/000/00 22 NNE AERO 23 NE RMY N/A
10/06 69/50/60/+4/0.00/407/59 15 N AERO 16 N RMY N/A
10/07 73/55/64/+8/0.00/550/80 15 WSW AERO 15 W RMY N/A
10/08 69/55/62/+7/T/616/90 24 ENE AERO 23 ENE RMY N/A
10/09 62/54/58/+3/0.01/273/40 23 E AERO 23 E RMY N/A
10/10 62/54/58/+3/T/000/00 22 E AERO 21 E RMY N/A
10/11 67/56/62/+8/0.01/371/55 20 NE AERO 21 NE RMY N/A
10/12 72/54/63/+9/0.00/612/91 15 SW AERO 15 SW RMY N/A
10/13 75/55/65/+11/0.00/630/94 18 SW AERO 18 SW RMY N/A
10/14 73/56/65/+12/0.00/614/92 19 N AERO 20 N RMY N/A
10/15 74/55/67/+14/0.00/452/68 24 S AERO 24 SSW RMY N/A
10/16 73/59/66/+14/0.06/351/53 43 S AERO 50 S RMY 44
10/17 62/47/55/+3/0.25/580/88 32 WNW AERO 31 WNW RMY 31
10/18 60/42/51/-1/0.01/544/83 31 NW AERO 32 NW RMY 33
10/19 59/40/50/-1/0.00/653/100 35 WNW AERO 37 W RMY 38
10/20 70/49/60/+9/0.00/560/86 23 W AERO 23 W RMY 23
10/21 74/56/65/+14/0.00/473/73 30 SSW AERO 32 S RMY 32
10/22 71/51/61/+11/0.00/535/83 27 S AERO 30 S RMY 29
10/23 60/44/52/+2/0.00/475/74 24 NW AERO 22 NW RMY 24
10/24 57/37/47/-3/0.01/589/92 25 NNW AERO 25 NNW RMY 25
10/25 56/47/52/+3/0.63/000/00 29 NE AERO 30 NE RMY 32
10/26 61/47/54/+5/2.23/000/00 49 NNE AERO 56 N RMY 54
10/27 48/44/46/-3/0.87/000/00 66 NNE AERO 74 NNE RMY 65
10/28 48/39/44/-4/0.00/000/00 26 NNE AERO 26 NNE RMY 28
10/29 49/37/43/-5/0.00/000/00 25 ENE AERO 24 ENE RMY 24
10/30 59/49/54/+7/1.02/000/00 33 E AERO 32 E RMY 33
10/31 64/51/58/+11/0.69/360/58 33 WNW AERO 35 SW RMY 35
RECORDS FOR THE MONTH:
Peak Gust of 66 MPH NNE on the 27th, beating the old record of
54 WNW, NE set in 1968 and 2018.
Daily Precipitation of 2.23 inches on the 26th, beating the old
record of 1.57 inches in 1898.
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 59/41/50/+3/0.00/0.0/…/.. 38 WNW AERO 39 WNW RMY 39
11/02 56/40/48/+1/0.00/0.0/…/.. 25 SW AERO 25 SW RMY 26
11/03 51/35/43/-3/0.00/0.0/…/.. 28 W AERO 25 W RMY 27
11/04 49/31/40/-6/0.00/0.0/…/.. 17 NNE AERO 17 NNW RMY 16
11/05 49/32/41/-5/0.00/0.0/…/.. 25 NW AERO 24 NW RMY 24
11/06 51/34/43/-2/0.00/0.0/…/.. 18 SSW AERO 17 SW RMY 19
11/07 The low since midnight is 37F, the daily normal low is 36F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR NOVEMBER 7
HIGH 75 IN 1938, 2020
LOW 21 IN 1894, 1930
PRECIP 2.02 INCHES IN 1953
SNOWFALL 3.5 IN 2012
PEAK GUST 69e ENE IN 1953
RECORDS FOR NOVEMBER 8
HIGH 73 IN 2020
LOW 20 IN 1921
PRECIP 2.24 INCHES IN 1972
SNOWFALL 4.0 IN 1894
PEAK GUST 72e SE IN 1947
TODAY’S REPORT PREPARED BY: Benjamin Turner
