Thursday, November 4, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, NOVEMBER 4, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0622E
SUNSET: 1633E
NICE WEATHER FOLLOWING AN OVERNIGHT FREEZE ATOP GREAT BLUE HILL….
Today we observed 85 miles for the average visibility and cool,
fair weather. Wind is light at an average speed of 5 mph from the
north. The sky is partly cloudy and dew points are stuck in the
lower 30’s!
This followed the first overnight freeze of the season, with
the temperature reaching 31F earlier on this morning.
The high so far today is 49F, 5 degrees below the normal max of
54F. The low since midnight is 31F, 6 degrees below the normal low
of 37F.
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: Scattered cirrus, few cumulus NE-E-S, few
altocumulus
Temperature: 32F; Dew Point: 30F; Relative Humidity: 93%
Wind: NNE @ 10 kts
Sea-level pressure: 1028.1 mb; 30.36 in. Hg: rising, then more
rapidly
Visibility: 85 miles
6-hr Max temp: 35F
6-hr Min temp: 31F
24-hr Precip: 0.00 ins.
BHO SA 1155 250 SCT 85 281/32/30/0310/036/ FEW CU NE-E-S FEW AC
ALQDS/ 8/271 53012 10035 20031
10 A.M.
Weather: Clear, few cumulus and cirrostratus
Temperature: 43F; Dew Point: 31F; Relative Humidity: 61%
Wind: N @ 3 kts, light and variable
Sea-level pressure: 1028.3 mb; 30.37 in Hg; rising, then more slowly
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 85 283/43/31/3603/037/ FEW CU FEW CS ALQDS WND L/V/ 8/106
51002
1 P.M.
Weather: Scattered cumulus, broken cirrostratus
Temperature: 48F, Dew point: 28F; Relative Humidity: 45%
Wind: SSW @ 2 kts, light and variable
Sea-level pressure: 1026.2 mb; 30.31 in Hg; falling then more rapidly
Visibility: 80 miles
6-hr Max temp: 49F
6-hr Min temp: 32F
6-hr Precip: 0.00 ins.
BHO SA 1755 50 SCT 250 BKN 80 263/48/28/2202/031/ WND L/V/ 8/106 58020
10049 20032
SUMMARY FOR WEDNESDAY, NOVEMBER 3, 2021
TEMPERATURE (DEGREES F)
MAX…….51 NORMAL…..55
MIN…….35 NORMAL…..38
MEAN……43 NORMAL…..46
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………… -3
TOTAL DEPARTURE FOR THE MONTH……………………… +1 [+0.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………22 DEPARTURE……. +3
TOTAL HEATING UNITS FOR THE MONTH………….. 54 DEPARTURE……. -2
TOTAL HEATING UNITS FOR THE SEASON………….381 DEPARTURE……-186
TOTAL HEATING UNITS LAST SEASON TO DATE……..532 DEPARTURE……-151
PEAK WIND GUST (MPH):
Official (1-Sec avg)…….28 W @ 1:14 P.M.
AEROVANE……………….25 W @ 1:14 P.M.
VECTOR #2 (Instantaneous)..28 @ 1:14 P.M.
DAVIS #2 ………………26 WNW @ 1:14 P.M.
RMY #2 (Instantaneous)…..27 WNW @ 1:14 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………………18 W @ 1:41 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 1:16 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 WNW @ 1:16 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 WNW @ 1:16 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……. 9.5 WNW [227 total miles]
VECTOR #2…………….. 10.4
DAVIS #2……………… 10.2 NW
RMY #2……………….. 10.3 NW
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….-0.45
TOTAL PRECIPITATION FOR THE YEAR………….54.85 DEPARTURE…+10.50
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……-0.1
TOTAL SNOWFALL FOR THE SEASON (2021-2022)……0.0 DEPARTURE……-0.8
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 The low since midnight is 31F, 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 4
HIGH 77 IN 1987
LOW 22 IN 1891
PRECIP 3.27 INCHES IN 1910
SNOWFALL 6.4 IN 1945
PEAK GUST 73 WNW IN 1965
RECORDS FOR NOVEMBER 5
HIGH 76 IN 1994
LOW 18 IN 1908
PRECIP 4.26 INCHES IN 1955
SNOWFALL 2.0 IN 1894
PEAK GUST 69 W IN 2004
TODAY’S REPORT PREPARED BY: Benjamin Turner
