Sunday, October 31, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, OCTOBER 31, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0617E
SUNSET: 1638E
A FAIR WEATHER DAY FOLLOWING A GOOD AMOUNT OF OVERNIGHT
RAINFALL….
Today we observed mild and mostly cloudy conditions with good visibility
after some fog this morning. Visibility increased to 80 miles by 10 A.M.
This is after overnight rainfall that totaled 1.63 inches.
The wind is cool and westerly with an average speed of 15 mph and a max
gust of 35 mph.
The high so far today is 63F, 7 degrees above the normal max of
56F. The low since midnight is 52F, 13 degrees above the normal low
of 39F.
Today’s Observations:
7 A.M.
Weather: Scattered stratocumulus, broken altocumulus and cirrus
Temperature: 54F; Dew Point: 54F; Relative Humidity: 100%
Wind: SSW @ 14G23 kts, peak of 35 mph E @ 5:59 A.M.
Sea-level pressure: 996.5 mb; 29.43 in. Hg: rising, then more
rapidly
Visibility: 10 miles, thin fog
6-hr Max temp: 56F
6-hr Min temp: 52F
24-hr Precip: 1.63 ins.
BHO SA 1155 30 SCT 100 BKN 250 BKN 10 965/54/54/2214G23/943/ THN F
ALQDS PK WND 2230/0559/ 8/871 53029 70163 10056 20052
10 A.M.
Weather: Scattered cumulus, broken cirrus
Temperature: 57F; Dew Point: 54F; Relative Humidity: 88%
Wind: WSW @ 11G21 kts, peak of 32 WSW at 9:16 A.M.
Sea-level pressure: 999.0 mb; 29.51 in Hg; rising, then more rapidly
Visibility: 80 miles
3-hr Precip: 0.100 ins.
BHO SA 1455 20 SCT 250 BKN 80 990/57/54/2411G21/951/ PK WND 2428/16/
8/201 53029
1 P.M.
Weather: Scattered cumulus, broken cirrus
Temperature: 62F, Dew point: 50F; Relative Humidity: 63%
Wind: W @ 10G16 kts
Sea-level pressure: 999.4 mb; 29.52 in Hg; rising unsteadily
Visibility: 60 miles
6-hr Max temp: 63F
6-hr Min temp: 54F
6-hr Precip: 0.00 ins.
BHO SA 1755 30 SCT 250 BKN 60 994/62/50/2710G16/952/ 8/201 52004 10063
20054
SUMMARY FOR SATURDAY, OCTOBER 30, 2021
TEMPERATURE (DEGREES F)
MAX…….59 NORMAL…..56
MIN…….49 NORMAL…..39
MEAN……54 NORMAL…..48
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………… +7
TOTAL DEPARTURE FOR THE MONTH……………………..+126 [+4.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………11 DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH…………..246 DEPARTURE……-130
TOTAL HEATING UNITS FOR THE SEASON………….320 DEPARTURE……-174
TOTAL HEATING UNITS LAST SEASON TO DATE……..419 DEPARTURE…….-99
COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………….3 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE SEASON………….717 DEPARTURE…….+40
TOTAL COOLING UNITS LAST SEASON TO DATE……..831 DEPARTURE……-114
PEAK WIND GUST (MPH):
Official……………….33 E @ 7:10 A.M.
AEROVANE (south tower)…..32 E @ 7:10 A.M.
VECTOR #2 (south tower)….34 @ 6:43 P.M.
DAVIS #2 (south tower)…..34 E @ 7:10 A.M.
RMY #2 (south tower)…….35 E @ 7:10 A.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………………25 E @ 7:15 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24 @ 7:15 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 E @ 7:15 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 E @ 7:15 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 #1 AVERAGE…..OUT OF SERVICE D/T RENOVATIONS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….13.7 ESE [329 total miles]
VECTOR #2……………..14.0
DAVIS #2………………14.1 ESE
RMY #2………………..13.9 ESE
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…….1.63 DEPARTURE….+1.46
TOTAL PRECIPITATION FOR THE MONTH………….7.85 DEPARTURE….+2.54
TOTAL PRECIPITATION FOR THE YEAR………….54.83 DEPARTURE…+11.11
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/…/.. 20 NE AERO 21 NE RMY N/A
10/12 72/54/63/+9/0.00/…/.. 15 SW AERO 15 SW RMY N/A
10/13 75/55/65/+11/0.00/…/.. 18 SW AERO 18 SW RMY N/A
10/14 73/56/65/+12/0.00/…/.. 19 N AERO 20 N RMY N/A
10/15 74/55/67/+14/0.00/…/.. 24 S AERO 24 SSW RMY N/A
10/16 73/59/66/+14/0.06/…/.. 43 S AERO 50 S RMY 44
10/17 62/47/55/+3/0.25/…/.. 32 WNW AERO 31 WNW RMY 31
10/18 60/42/51/-1/0.01/…/.. 31 NW AERO 32 NW RMY 33
10/19 59/40/50/-1/0.00/…/.. 35 WNW AERO 37 W RMY 38
10/20 70/49/60/+9/0.00/…/.. 23 W AERO 23 W RMY 23
10/21 74/56/65/+14/0.00/…/.. 30 SSW AERO 32 S RMY 32
10/22 71/51/61/+11/0.00/…/.. 27 S AERO 30 S RMY 29
10/23 60/44/52/+2/0.00/…/.. 24 NW AERO 22 NW RMY 24
10/24 57/37/47/-3/0.01/…/.. 25 NNW AERO 25 NNW RMY 25
10/25 56/47/52/+3/0.63/…/.. 29 NE AERO 30 NE RMY 32
10/26 61/47/54/+5/…./…/.. 49 NNE AERO 56 N RMY 54
10/27 48/44/46/-3/…./…/.. 66 NNE AERO 74 NNE RMY 65
10/28 48/39/44/-4/0.00/…/.. 26 NNE AERO 26 NNE RMY 28
10/29 49/37/43/-5/…./…/.. 25 ENE AERO 24 ENE RMY 24
10/30 59/49/54/+7/…./…/.. 33 E AERO 32 E RMY 33
10/31 The low since midnight is 52F, the daily normal low is 39F
RECORDS FOR THE MONTH:
Peak gust of 66 NNE on the 27th, beating the old record of
54 WNW, NE set in 1968 and 2018.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR OCTOBER 31
HIGH 79F IN 1946
LOW 22F IN 1904
PRECIP 3.74 INCHES IN 1991
SNOWFALL TRACE IN 1906
PEAK GUST 70e S IN 1945
RECORDS FOR NOVEMBER 1
HIGH 75 IN 2003
LOW 22 IN 1913,1923
PRECIP 2.93 INCHES IN 1985
SNOWFALL TRACE IN 1906,1951
PEAK GUST 78 ESE IN 1997
TODAY’S REPORT PREPARED BY: Benjamin Turner
