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Thursday, September 15, 2022

September 15, 2022

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, SEPTEMBER 15, 2022 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

THURSDAY, SEPTEMBER 15, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0524E
SUNSET:  1754E

ALMOST CLEAR SKIES WITH VERY LITTLE HUMIDITY AND EXCELLENT
VISIBILITY….

We observed amazing weather today, with visibility of 85 miles
and nearly cloudless skies. A cool northwesterly breeze was
coming in at around 15 mph on average with frequent gusts
above 20 mph. Combined with the dew point of 42F and temperatures
below 70F, this is the makings of great hiking weather.

The drought monitor showed fewer areas of extreme drought today,
with everywhere but the north shore area being out of that
category. The observatory is still showing a deficit of -9.94
inches on the year with a surplus of 1.09 inches on the month
so far.

The high so far today is 69F, which is 4 degrees below the
normal maximum of 73F. The low since midnight is 55F, which is
a degree below the normal minimum of 56F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few small cumulus in most of the horizon
with thin cirrus
Temperature: 56F; Dew Point: 42F; Relative Humidity: 58%
Wind: NNW @ 12G18 kts
Sea-level pressure: 1018.8 mb; 30.09 in. Hg: rising, then
more slowly
Visibility: 85 miles
6-hr Max temp: 62F
6-hr Min temp: 55F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 85 188/56/42/3412G18/009/ FEW SML CU E-S-W FEW
THN CI ALQDS/ 8/101 51026 10062 20055

10 A.M.
Weather: Clear, few small cumulus and thin cirrus
Temperature: 64F; Dew Point: 42F; Relative Humidity: 44%
Wind: NW @ 14G21 kts
Sea-level pressure: 1010.8 mb; 29.85 in Hg: rising then falling
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 85 189/64/42/3214G21/009/ FEW SML CU ALQDS
FEW THN CI ALQDS/ 8/101 50001

1 P.M.
Weather: Clear, few small distant cumulus
Temperature: 68F, Dew point: 42F; Relative Humidity: 38%
Wind: WNW @ 12G18 kts
Sea-level pressure: 1018.6 mb; 30.08 in Hg: falling, then
more slowly
Visibility: 85 miles
6-hr Max temp: 69F
6-hr Min temp: 56F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 85 186/68/42/3012G18/008/ FEW SML CU DSNT ALQDS/
8/100 56003 10069 20056

————————————————————–

SUMMARY FOR WEDNESDAY, SEPTEMBER 14, 2022

TEMPERATURE (DEGREES F)
MAX…….78   NORMAL…..74
MIN…….56   NORMAL…..56
MEAN……67   NORMAL…..65

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+2
TOTAL DEPARTURE FOR THE MONTH………………….+8 [+0.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE MONTH…………….7  DEPARTURE…….-16
TOTAL HEATING UNITS FOR THE SEASON……………7  DEPARTURE…….-34
TOTAL HEATING UNITS LAST SEASON TO DATE………38  DEPARTURE…….-31

COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY…………….2  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………44  DEPARTURE……..-7
TOTAL COOLING UNITS FOR THE SEASON………….880  DEPARTURE……+233
TOTAL COOLING UNITS LAST SEASON TO DATE……..684  DEPARTURE……+196

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….29 WNW @ 11:12 A.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..31     @ 11:12 A.M.
DAVIS #2 ………………29 WNW @ 11:12 A.M.
RMY #2 (Instantaneous)…..31 WNW @ 11:12 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………………23 WNW @ 11:14 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21     @ 11:12 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 WNW @ 11:13 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 WNW @ 11:12 A.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……..12.0 W  [287 total miles] VECTOR #2………………12.6
DAVIS #2……………….12.9 WNW
RMY #2…………………12.4 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……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..2.79 DEPARTURE…..+1.09
TOTAL PRECIPITATION FOR THE YEAR…………..26.37 DEPARTURE…..-9.94

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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

9/1   78/59/69/0/0.00/757/96            36 WNW  AERO N/A    RMY 37
9/2   73/53/63/-6/0.00/762/97           19 N    AERO N/A    RMY 19
9/3   80/59/70/+2/0.00/673/86           23 S    AERO N/A    RMY 24
9/4   86/61/74/+6/0.00/554/71           20 SSW  AERO N/A    RMY 20
9/5   75/60/68/0/0.83/000/00            20 E    AERO N/A    RMY 19
9/6   63/60/62/-6/1.57/000/00           27 NE   AERO N/A    RMY 26
9/7   70/57/64/-3/T/309/40              22 NE   AERO N/A    RMY 21
9/8   71/56/64/-3/0.01/684/89           20 ENE  AERO N/A    RMY 20
9/9   77/55/66/-1/0.00/513/67           19 WNW  AERO N/A    RMY 19
9/10  85/61/73/+7/0.00/657/86           22 NW   AERO N/A    RMY 21
9/11  76/62/69/+3/0.06/015/02           22 WSW  AERO N/A    RMY 23
9/12  74/62/68/+2/0.04/121/16           14 WSW  AERO N/A    RMY 15
9/13  74/66/70/+5/…./…/..           22 W    AERO N/A    RMY 22
9/14  78/56/67/+2/…./…/..           29 WNW  AERO N/A    RMY 29

9/15  The low since midnight is 55F, the daily normal low is 56F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR SEPTEMBER 15
HIGH 89F IN 1931
LOW 35F IN 1913
PRECIP 3.93 INCHES IN 1904 (Extra-tropical storm making landfall in New England on 9/15/1904 passing east of BHO and bringing a storm total of 4.11 inches 9/14-15/1904)
PEAK GUST 65e MPH NW IN 1944 (In the wake of Great Atlantic Hurricane)

RECORDS FOR SEPTEMBER 16
HIGH 91F IN 1939,1941
LOW 39F IN 1984
PRECIP 5.12 INCHES IN 1933 (Hurricane)
PEAK GUST 59 MPH SSE IN 1999

TODAY’S REPORT PREPARED BY: Benjamin Turner

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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§ 01

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