Sunday, October 24, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, OCTOBER 24, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0608E
SUNSET: 1648E
MOSTLY CLEAR SKIES AND COOL, FAIR WEATHER ATOP GREAT
BLUE HILL….
The sky was almost clear for most of the day with only a
few clouds being seen off in the distance. Wind was around
10 mph and westerly for most of the day. The max gust so
far is in the low 20’s, but it is a cool, refreshing breeze.
Dew points have remained in the low 30’s, making it supreme
hiking weather. This is definitely proven considering the
amount of people on the top of the hill.
Gift shop is open until 4 P.M., by the way!
The high so far today is 55F, 3 degrees below the normal max
of 58F. The low since midnight is 37F, 4 degrees below the
normal low of 41F.
Today’s Observations:
7 A.M.
Weather: Clear, few distant cumulus and distant cirrus E-SE
Temperature: 39F; Dew Point: 36F; Relative Humidity: 85%
Wind: NW @ 9 kts
Sea-level pressure: 1020.6 mb; 30.14 in. Hg: rising, then more rapidly
Visibility: 85 miles
6-hr Max temp: 43F
6-hr Min temp: 37F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 85 206/39/36/3109/014/ FEW CU E-SE FEW CI E-SE/ 8/102
53027 10043 20037
10 A.M.
Weather: Clear, few distant cirrus offshore
Temperature: 48F; Dew Point: 30F; Relative Humidity: 49%
Wind: WNW @ 9G14 kts
Sea-level pressure: 1021.0 mb; 30.15 in Hg; rising then falling
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 85 210/48/30/3009G14/015/ FEW CI DSNT OFFSHR/
8/002 51004
1 P.M.
Weather: Clear, few cumulus, altocumulus, and cirrus distant
S-SW
Temperature: 55F, Dew point: 31F; Relative Humidity: 39%
Wind: W @ 10G20 kts
Sea-level pressure: 1020.3 mb; 30.13 in Hg; falling, then more
rapidly
Visibility: 85 miles
6-hr Max temp: 55F
6-hr Min temp: 39F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 85 203/55/31/2810G20/013/ FEW CU DSNT S-SW FEW AC
DSNT S-SW FEW CI DSNT S-SW/ 8/151 58007 10055 20039
SUMMARY FOR SATURDAY, OCTOBER 23, 2021
TEMPERATURE (DEGREES F)
MAX…….60 NORMAL…..58
MIN…….44 NORMAL…..41
MEAN……52 NORMAL…..50
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………+2
TOTAL DEPARTURE FOR THE MONTH……………………..+126 [+5.3 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………13 DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH…………..131 DEPARTURE……-130
TOTAL HEATING UNITS FOR THE SEASON………….205 DEPARTURE……-173
TOTAL HEATING UNITS LAST SEASON TO DATE……..284 DEPARTURE…….-79
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……………….24 NW @ 7:54 P.M.
AEROVANE (south tower)…..22 NW @ 7:00 P.M.
VECTOR #2 (south tower)….25 @ 7:54 P.M.
DAVIS #2 (south tower)…..22 NW @ 7:54 P.M.
RMY #2 (south tower)…….24 NW @ 7:54 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………………24 NW @ 7:54 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..25 @ 7:29 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 NW @ 7:55 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 NW @ 7:29 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……..8.7 NW [208 total miles]
VECTOR #2………………9.5
DAVIS #2……………….9.2 NW
RMY #2…………………9.3 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….-0.19
TOTAL PRECIPITATION FOR THE MONTH………….2.42 DEPARTURE….-1.62
TOTAL PRECIPITATION FOR THE YEAR………….49.40 DEPARTURE….+6.95
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 The low since midnight is 37F, the daily normal low is 41F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR OCTOBER 24
HIGH 79F IN 1963
LOW 22F IN 1969
PRECIP 2.96 INCHES IN 1890
SNOWFALL 1.8 INCHES IN 1960
PEAK GUST 70 MPH SE IN 1959
RECORDS FOR OCTOBER 25
HIGH 81F IN 1963
LOW 26F IN 1922,1939
PRECIP 2.45 INCHES IN 2005
SNOWFALL 1.2 INCHES IN 1960
PEAK GUST 72 MPH ESE IN 1980
TODAY’S REPORT PREPARED BY: Benjamin Turner
