Tuesday, October 17, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, OCTOBER 17, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0559E
SUNSET: 1659E
CONTINUED ON THE COOL SIDE WITH A MIX OF SUN AND CLOUDS…
We have seen an interplay of sun and clouds today with the
big puffy cumulus clouds allowing for a rather drastic
contrast to the deep blue sky. The view of the sky today
has been quite enjoyable.
Temperatures are again on the chilly side with readings
reaching the upper 50s to around 60. The dew point has
been varying a bit between the mid 40s and low 50s.
The wind has been on the light side today with an average
speed so far of around 7mph. Our peak gust so far is only
around 14mph, occurring just after 5:30am this morning.
Visibility has been excellent today, with views of 70-80
miles.
The maximum temperature so far today has been 60F, which is 1
degree below the normal high of 61F. The minimum temperature
since midnight is 45F, which is 1 degree above the normal low
of 44F.
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Today’s Observations:
7 A.M.
Weather: Scattered stratocumulus, scattered altocumulus,
thin broken cirrus, few lower stratus fractus distant SW, few
moderate cumulus NE-S
Temperature: 47F; Dew Point: 46F; Relative Humidity: 95%
Wind: N @ 7 kts
Sea-level pressure: 1011.1 mb; 29.86 in. Hg: rising, then more rapidly
Visibility: 80 miles
6-hr Max temp: 47F
6-hr Min temp: 45F
24-hr Precip: 0.03 inches
BHO SA 1155 40 SCT 60 SCT E250 -BKN 80 111/47/46/3607/986/
FEW LWR STFRA DSNT SW FEW MDT CU NE-S/ 8/861 53023 70003 10047 20045
10 A.M.
Weather: Broken cumulus, thin broken cirrus, virga distant ENE-SE
Temperature: 57F; Dew Point: 50F; Relative Humidity: 76%
Wind: NNE @ 5 kts, wind light
Sea-level pressure: 1012.9 mb; 29.91 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E20 BKN 250 -BKN 70 129/57/50/0305/991/ VIRGA DSNT ENE-SE
WND LGT/ 8/201 51018
1 P.M.
Weather: Scattered cumulus, broken stratocumulus, thin broken cirrus
Temperature: 55F; Dew Point: 48F; Relative Humidity: 76%
Wind: NE @ 6 kts, wind light
Sea-level pressure: 1013.3 mb; 29.92 in. Hg: rising unsteadily
Visibility: 70 miles
6-hr Max temp: 60F
6-hr Min temp: 47F
6-hr Precip: Trace
BHO SA 1755 25 SCT 60 BKN 250 -BKN 70 133/55/48/0406/992/ WND LGT/
8/801 52004 10060 20047
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SUMMARY FOR MONDAY, OCTOBER 16, 2023
TEMPERATURE (DEGREES F)
MAX…….58 NORMAL…..61
MIN…….44 NORMAL…..44
MEAN……51 NORMAL…..52
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-1
TOTAL DEPARTURE FOR THE MONTH…………………+64 [+3.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY……………14 DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH…………..107 DEPARTURE…….-55
TOTAL HEATING UNITS FOR THE SEASON………….206 DEPARTURE…….-73
TOTAL HEATING UNITS LAST SEASON TO DATE……..238 DEPARTURE…….-32
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………15 DEPARTURE……..+9
TOTAL COOLING UNITS FOR THE SEASON………….704 DEPARTURE…….+28
TOTAL COOLING UNITS LAST SEASON TO DATE……..884 DEPARTURE……-180
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated
F420C (Official)……….E17 WNW @ 12:13 A.M.
VECTOR #1 (1-Sec)……….17 WNW @ 05:21 A.M.
VECTOR #2 (1-Sec)……….19 NW @ 05:32 A.M.
DAVIS #1……………….17 W @ 12:02 A.M.
DAVIS #2 ………………17 WNW @ 12:48 A.M.
RMY #1 (Instantaneous)…..17 NW @ 08:28 A.M.
RMY #2 (Instantaneous)…..19 NW @ 05:39 A.M.
MERLIN…………………15 NW
RICHARDS (C5C) (Inst)……17 @ 01:08 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………13 WNW @ 12:06 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..13 @ 12:02 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 @ 05:33 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 W @ 12:02 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 NW @ 05:33 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..12 WNW @ 12:02 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 NW @ 05:33 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………13 @ 12:02 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..6.7 NNW [161 total miles]
VECTOR #1………………7.4
VECTOR #2………………8.0
DAVIS #1……………….7.3 NNW
DAVIS #2……………….7.5 NNW
RMY #1…………………7.3 NNW
RMY #2…………………7.8 NNW
RICHARDS (C5C)………….8.0
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.03 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..0.23 DEPARTURE…..-2.50
TOTAL PRECIPITATION FOR THE YEAR…………..47.45 DEPARTURE…..+6.05
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PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
10/1 68/50/59/+1/0.00/458/65 20 NNE VEC1 20 NNE RMY 19
10/2 68/55/62/+4/0.00/681/97 24 NE VEC1 23 NE RMY 24
10/3 81/54/68/+11/0.00/672/96 18 WSW VEC1 18 WSW RMY 18
10/4 81/64/73/+16/0.00/669/96 17 S VEC1 17 S RMY 16
10/5 77/59/68/+11/0.00/638/92 24 S VEC1 24 S RMY 23
10/6 71/60/66/+10/0.00/269/39 20 SE VEC1 19 SE RMY 18
10/7 68/54/61/+5/0.16/007/01 30 WNW VEC1 29 WNW RMY 29
10/8 63/48/56/+1/0.00/651/95 30 W VEC1 30 WNW RMY 30
10/9 61/44/53/-2/0.00/532/78 25 WSW VEC1 24 WSW RMY 25
10/10 64/47/56/+1/T/245/36 23 W VEC1 22 W RMY 21
10/11 68/50/59/+5/0.00/393/58 23 SSW VEC1 22 SW RMY 22
10/12 69/51/60/+6/0.00/…/.. 18 NW VEC1 18 NNW RMY 18
10/13 61/43/52/-2/0.00/…/.. 33 NW VEC1 31 NW RMY 34
10/14 60/44/52/-1/0.00/…/.. 24 NW VEC1 23 NW RMY 23
10/15 59/44/52/-1/0.00/…/.. 24 NNW VEC1 25 NNW RMY 25
10/16 58/44/51/-1/0.07/…/.. 17 WNW VEC1 17 WNW RMY 17
10/17 The low since midnight is 45F, the daily normal low is 44F
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OCTOBER DAILY RECORDS TO DATE
.NONE…
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR OCTOBER 17
HIGH 86F IN 1947
LOW 25F IN 1886
PRECIP 1.87 INCHES IN 1989
SNOWFALL TRACE IN 1970
PEAK GUST 61 MPH E IN 2019
RECORDS FOR OCTOBER 18
HIGH 82F IN 1908
LOW 26F IN 1939
PRECIP 2.79 INCHES IN 1975
SNOWFALL 3.0 INCHES IN 2009
PEAK GUST 66 MPH S IN 1967
TODAY’S REPORT PREPARED BY: Matt Douglas
