Saturday, November 6, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, NOVEMBER 6, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0624E
SUNSET: 1631E
GOOD FALL WEATHER WITH ALMOST CLEAR SKIES AND A
LIGHT WESTERLY WIND….
We observed another fair weather day with a light northwesterly wind.
Skies were almost cloudless save for some distant cirrus clouds to the
south. Visibility was excellent, with a max of 85 miles being seen at
the 1 P.M. observation.
The observer also witnessed alpacas on leashes today on the summit.
The high so far today is 50F, 4 degrees below the normal max of
54F. The low since midnight is 34F, 2 degrees below 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: N/A
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 cumulus NE-SE, few distant cirrus
NE-SE-S)
Temperature: 35F; Dew Point: 27F; Relative Humidity: 70%
Wind: NW @ 6 kts, wind light
Sea-level pressure: 1031.1 mb; 30.45 in. Hg: rising then steady
Visibility: 80 miles
6-hr Max temp: 36F
6-hr Min temp: 34F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 80 311/35/27/3206/045/ FEW CU DSNT NE-SE FEW CI DSNT
NE-SE-S WND LGT/ 8/102 51004 10036 20034
10 A.M.
Weather: Clear (few distant cirrostratus SE-SW)
Temperature: 45F; Dew Point: 30F; Relative Humidity: 55%
Wind: NNW @ 2 kts (wind light and variable)
Sea-level pressure: 1031.0 mb; 30.45 in Hg; rising then falling
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 80 310/45/30/3402/045/ FEW CS DSNT SE-SW WND L/V/
8/005 55001
1 P.M.
Weather: Clear (few distant cirrostratus SE-SW)
Temperature: 50F, Dew point: 28F; Relative Humidity: 42%
Wind: NW @ 3 kts, (wind light and variable)
Sea-level pressure: 1028.8 mb; 30.38 in Hg; rising then falling
Visibility: 85 miles
6-hr Max temp: 50F
6-hr Min temp: 35F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 85 288/50/28/3203/038/ FEW CS DSNT SE-SW WND L/V/
8/005 55022 10050 20035
SUMMARY FOR FRIDAY, NOVEMBER 5, 2021
TEMPERATURE (DEGREES F)
MAX…….49 NORMAL…..54
MIN…….32 NORMAL…..37
MEAN……41 NORMAL…..46
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………… -5
TOTAL DEPARTURE FOR THE MONTH……………………… -10 [-2.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………24 DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH…………..103 DEPARTURE……..+9
TOTAL HEATING UNITS FOR THE SEASON………….430 DEPARTURE……-176
TOTAL HEATING UNITS LAST SEASON TO DATE……..561 DEPARTURE……-131
PEAK WIND GUST (MPH):
Official (1-SEC AVG)…….25 NW @ 1:30 P.M.
AEROVANE……………….24 NW @ 1:31 P.M.
VECTOR #2 (Instantaneous)..25 @ 1:31 P.M.
DAVIS #2 ………………24 NW @ 1:31 P.M.
RMY #2 (Instantaneous)…..24 NW @ 1:30 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 NNW @ 1:37 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 1:37 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 NNW @ 1:37 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 NNW @ 1:37 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……. 8.6 N [206 total miles]
VECTOR #2…………….. 9.2
DAVIS #2……………… 8.8 N
RMY #2……………….. 9.1 N
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…..-0.14
TOTAL PRECIPITATION FOR THE MONTH………….0.00 DEPARTURE…..-0.74
TOTAL PRECIPITATION FOR THE YEAR………….54.85 DEPARTURE….+10.21
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………….0.0 DEPARTURE……-0.1
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 The low since midnight is 34F, the daily normal low is 37F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR NOVEMBER 6
HIGH 72 IN 2020
LOW 22 IN 1951
PRECIP 1.72 INCHES IN 1907
SNOWFALL 6.0 IN 1894
PEAK GUST 63 W IN 1973
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
TODAY’S REPORT PREPARED BY: Benjamin Turner
