Saturday, October 23, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, OCTOBER 23, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0607E
SUNSET: 1652E
DECREASING CLOUD COVER WITH EXCELLENT VISIBILITY IN
THE MORNING HOURS….
Today we observed an excellent visibility of 85 miles, and
almost overcast skies in the morning. Skies cleared up as
the day went on, with scattered clouds being seen
at the 1 P.M. observation. This is fair weather day with
dew points in the lower 40’s. Great hiking weather!
The high so far today is 60F, a degree above the normal max
of 59F. The low since midnight is 46F, 5 degrees above the
normal low of 41F.
Today’s Observations:
7 A.M.
Weather: Broken stratus, overcast altocumulus, break in
overcast S-W-NNW
Temperature: 46F; Dew Point: 39F; Relative Humidity: 75%
Wind: N @ 8G14 kts
Sea-level pressure: 1014.1 mb; 29.95 in. Hg: rising, then more rapidly
Visibility: 85 miles
6-hr Max temp: 51F
6-hr Min temp: 46F
24-hr Precip: 0.00 ins.
BHO SA 1155 20 BKN 80 OVC 85 141/46/39/3608G14/995/ BINOVC S-W-NNW/
8/670 53010 10051 20046
10 A.M.
Weather: Scattered stratocumulus, broken cirrocumulus
Temperature: 53F; Dew Point: 43F; Relative Humidity: 68%
Wind: N @ 4 kts, light and variable
Sea-level pressure: 1014.1 mb; 29.95 in Hg; rising then falling
Visibility: 80 miles, hazy
3-hr Precip: 0.00 ins.
BHO SA 1455 20 SCT 250 BKN 80 141/53/43/3604/995/ WND L/V/ 8/809 50000
1 P.M.
Weather: Scattered altocumulus, few cumulus
Temperature: 59F, Dew point: 42F; Relative Humidity: 53%
Wind: WNW @ 11G15 kts
Sea-level pressure: 1012.3 mb; 29.89 in Hg; falling unsteadily
Visibility: 80 miles, hazy
6-hr Max temp: 60F
6-hr Min temp: 46F
6-hr Precip: 0.00 ins.
BHO SA 1755 80 SCT 80 123/59/42/3011G15/989/ FEW CU ALQDS 8/150 57018
10060 20046
SUMMARY FOR FRIDAY, OCTOBER 22, 2021
TEMPERATURE (DEGREES F)
MAX…….71 NORMAL…..59
MIN…….51 NORMAL…..42
MEAN……61 NORMAL…..50
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………+11
TOTAL DEPARTURE FOR THE MONTH……………………..+124 [+5.4 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….4 DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE MONTH…………..118 DEPARTURE……-128
TOTAL HEATING UNITS FOR THE SEASON………….192 DEPARTURE……-171
TOTAL HEATING UNITS LAST SEASON TO DATE……..279 DEPARTURE…….-87
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……………….27 S @ 4:32 P.M.
AEROVANE (south tower)…..30 S @ 4:33 P.M.
VECTOR #2 (south tower)….29 @ 4:32 P.M.
DAVIS #2 (south tower)…..34 S @ 4:07 P.M.
RMY #2 (south tower)…….29 S @ 4:32 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………………21 S @ 3:22 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 @ 4:34 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 S @ 3:23 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 S @ 4:34 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……..12.3 W [296 total miles]
VECTOR #2………………13.2
DAVIS #2……………….13.0 WSW
RMY #2…………………13.1 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….-0.18
TOTAL PRECIPITATION FOR THE MONTH………….2.42 DEPARTURE….-1.43
TOTAL PRECIPITATION FOR THE YEAR………….49.40 DEPARTURE….+7.14
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 The low since midnight is 46F, 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 23
HIGH 82F IN 1947
LOW 24F IN 1969
PRECIP 3.66 INCHES IN 2014
SNOWFALL 3.0 INCHES IN 1891
PEAK GUST 78e MPH NW IN 1941
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
TODAY’S REPORT PREPARED BY: Benjamin Turner
