Monday, October 25, 2021
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, OCTOBER 25, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0609E
SUNSET: 1647E
RAIN OVERNIGHT TAPERS TO DRIZZLE BY LATE MORNING….
Big difference today from yesterday. Clouds quickly moved
into the region last evening with rainfall not far behind.
Rain fell all night into mid-late morning before tapering to
drizzle. Fog and drizzle has been the theme since.
Rainfall through 7 A.M. totaled 0.41″ with an additional 0.06″
falling through 1 P.M.
Today’s rain is just an appetizer to what looks to be a fairly
powerful nor’easter heading this way for tomorrow into Wednesday.
Wind this morning was blowing mainly out of the east, however it
has backed more to the north-northeast early this afternoon. Wind
speeds have averaged around 11mph with a peak gust so far of 27mph,
again, just an appetizer of things to come!
Visibility has been holding between 1/8 and 1/4 of a mile as the
summit has been socked in with dense fog (we’re technically in
the low ceiling).
The high so far today is 56F, 2 degrees below the normal max
of 58F. The low since midnight is 47, 6 degrees above the
normal low of 41F.
The low temperature of 37F on Sunday was the first temperature
Of the season below 40F, which ties the record for the latest
Date for the first temperature below 40F.
BHO Latest First Fall Temperature Below 40F, deg F (1885-2021):
1) 36 on 24 October 2013
37 on 24 October 2021
3) 34 on 22 October 1955
4) 39 on 21 October 2005
5) 38 on 20 October 1960
6) 39 on 19 October 2014
Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 300ft, light rain
Temperature: 49F; Dew Point: 49F; Relative Humidity: 100%
Wind: E @ 14G19 kts
Sea-level pressure: 1019.4 mb; 30.10 in. Hg: falling, then more slowly
Visibility: 1/4 mile, fog
6-hr Max temp: 49F
6-hr Min temp: 47F
24-hr Precip: 0.41 ins.
BHO SA 1155 X W3 1/4R-F 194/49/49/0814G19/010/ 8//// 56018 6037/ 70041
10049 20047
10 A.M.
Weather: Sky obscured, vertical visibility 200ft, light drizzle
Temperature: 52F; Dew Point: 52F; Relative Humidity: 100%
Wind: E @ 10G15 kts
Sea-level pressure: 1017.5 mb; 30.05 in Hg; falling, then more rapidly
Visibility: 1/8 mile, fog
3-hr Precip: 0.05 ins.
BHO SA 1455 X W2 1/8L-F 175/52/52/0810G15/005/ PCPN VRY LGT/ 8//// 58019 6005/
1 P.M.
Weather: Sky obscured, vertical visibility 200ft, light drizzle
Temperature: 54F, Dew point: 54F; Relative Humidity: 100%
Wind: NNE @ 10G18 kts
Sea-level pressure: 1015.3 mb; 29.98 in Hg; falling, then more rapidly
Visibility: 1/8 mile, fog
6-hr Max temp: 56F
6-hr Min temp: 49F
6-hr Precip: 0.06 ins.
BHO SA 1755 X W2 1/8L-F 153/54/54/0210G18/998/ 8//// 58022 6006/ 10056 20049
SUMMARY FOR SUNDAY, OCTOBER 24, 2021
TEMPERATURE (DEGREES F)
MAX…….57 NORMAL…..58
MIN…….37 NORMAL…..41
MEAN……47 NORMAL…..50
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………… -3
TOTAL DEPARTURE FOR THE MONTH……………………..+123 [+4.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY……………18 DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH…………..149 DEPARTURE……-127
TOTAL HEATING UNITS FOR THE SEASON………….223 DEPARTURE……-171
TOTAL HEATING UNITS LAST SEASON TO DATE……..294 DEPARTURE…….-71
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 NNW @ 8:57 A.M.
AEROVANE (south tower)…..25 NNW @ 8:57 A.M.
VECTOR #2 (south tower)….26 @ 8:57 A.M.
DAVIS #2 (south tower)…..23 NNW @ 8:57 A.M.
RMY #2 (south tower)…….25 NW @ 8:57 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………………16 W @ 12:40 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 12:42 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 WNW @ 12:42 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 WNW @ 12:42 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……..9.0 WNW [215 total miles]
VECTOR #2………………9.9
DAVIS #2……………….9.8 WNW
RMY #2…………………9.8 WNW
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…….0.41 DEPARTURE….+0.23
TOTAL PRECIPITATION FOR THE MONTH………….2.83 DEPARTURE….-1.39
TOTAL PRECIPITATION FOR THE YEAR………….49.81 DEPARTURE….+7.18
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 The low since midnight is 47F, 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 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
RECORDS FOR OCTOBER 26
HIGH 80F IN 1963
LOW 24F IN 1921,1933
PRECIP 1.57 INCHES IN 1898
SNOW 3.0 INCHES IN 1962
WIND 59 MPH SSE IN 1967
TODAY’S REPORT PREPARED BY: Matt Douglas
