Saturday, October 30, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, OCTOBER 30, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0615E
SUNSET: 1640E
LIGHT RAIN AND FOG WITH A CONSISTENT EASTERLY WIND….
Today is overcast and cool alongside limited visibility. Two miles
were observed at 7A, then slipping to a 1/2 mile quickly by 10A. Cloudy
overcast conditions lasted throughout the night with a slow incremental
increase of temperatures from the low 40’s into the 50’s by morning.
Looking at things in the wind department, the peak gust thus far today
is 31 MPH from the ENE with an average speed of 15 MPH. Overnight
rainfall totaled 0.06 inches with an additional 0.17 inches falling
between the 7 A.M. and 1 P.M. observations.
The high so far today is 57F, 1 degrees above the normal max of
56F. The low since midnight is 49F, 10 degrees above the normal low
of 39F.
Today’s Observations:
7 A.M.
Weather: Overcast Stratus Light Rain
Temperature: 52F; Dew Point: 52F; Relative Humidity: 100%
Wind: E @ 17G27 kts, peak of 31 mph E @ 0653 A.M.
Sea-level pressure: 1008.9 mb; 29.79 in. Hg: decreasing, then
decreasing more rapidly
Visibility: 2 miles
6-hr Max temp: 52F
6-hr Min temp: 49F
24-hr Precip: 0.06 ins.
BHO SA 1155 06 OVC 2R-F 089/52/52/0817G27/979/ PK WND 0827/53/
8/6// 58010 70006 10052 20049
10 A.M.
Weather: Light Rain
Temperature: 55F; Dew Point: 55F; Relative Humidity: 100%
Wind: ESE @ 14 kts
Sea-level pressure: 1010.1 mb; 29.83 in Hg; rising , then falling
Visibility: 1/2 mile (fog)
3-hr Precip: 0.14 ins.
BHO SA 1455 X W3 1/2R-F 101/55/55/1114G22/983/ 8//// 6014/ 50012
1 P.M.
Weather: Overcast Stratus Light Drizzle
Temperature: 57F, Dew point: 57F; Relative Humidity: 100%
Wind: SE @ 13G127 kts, peak of 31 mph SE @ 1238 P.M.
Sea-level pressure: 1007.9 mb; 29.76 in Hg; falling, then levelling
off and rising
Visibility: 3/4 miles (fog)
6-hr Max temp: 57F
6-hr Min temp: 52F
6-hr Precip: 0.17 ins.
BHO SA 1755 20 OVC 3/4L-F 079/57/57/1313G27/976/ PK WND 1327/38/ 8/6//
6017/ 55022 10057 20052
SUMMARY FOR FRIDAY, OCTOBER 29, 2021
TEMPERATURE (DEGREES F)
MAX…….49 NORMAL…..56
MIN…….37 NORMAL…..39
MEAN……43 NORMAL…..48
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………… -5
TOTAL DEPARTURE FOR THE MONTH……………………..+119 [+4.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………22 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE MONTH…………..235 DEPARTURE……-124
TOTAL HEATING UNITS FOR THE SEASON………….309 DEPARTURE……-167
TOTAL HEATING UNITS LAST SEASON TO DATE……..388 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……………….25 NNE @ 10:17 P.M.
AEROVANE (south tower)…..24 ENE @ 10:23 P.M.
VECTOR #2 (south tower)….26 @ 10:17 P.M.
DAVIS #2 (south tower)…..26 E @ 10:17 P.M.
RMY #2 (south tower)…….25 ENE @ 10:17 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 ENE @ 10:17 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19 @ 10:17 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 NNE @ 10:21 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 NNE @ 10:21 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…….10.3 N [247 total miles]
VECTOR #2……………..10.9
DAVIS #2………………10.7 ENE
RMY #2………………..10.7 NE
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…….0.06 DEPARTURE….-0.12
TOTAL PRECIPITATION FOR THE MONTH………….6.22 DEPARTURE….+1.08
TOTAL PRECIPITATION FOR THE YEAR………….53.20 DEPARTURE….+9.65
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 The low since midnight is 49F, 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 30
HIGH 75F IN 1946,1989
LOW 21F IN 1928
PRECIP 1.85 INCHES IN 1917
SNOWFALL 6.5 INCHES IN 2020
PEAK GUST 73 SE IN 2017
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
TODAY’S REPORT PREPARED BY: Augustin Busschaert and Benjamin Turner
