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

SUNDAY, SEPTEMBER 25, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0535E
SUNSET: 1736E

INCREASING CLOUDS AND HUMIDITY WITH A SOUTHERLY BREEZE….

We certainly have had some very fine early fall weather the
last couple of days. However today is featuring increasing
amounts of cloud cover as a warm front approaches the region.
While the temperature is still quite pleasant reaching the mid
to upper 60s, the dew point has been creeping up all day from
the mid 40s early this morning to the mid 50s early this
afternoon.

A southerly breeze has been picking up a bit as well helping
to transport a more moisture laden air mass into the area.

We are expecting more showers and perhaps some thunderstorms
later this afternoon and especially this evening. While we’re
certainly doing better in terms of rainfall than we were all
summer, we are still running a significant deficit for the
year. The annual deficit is at -9.98 inches, despite the
month of September seeing a 1.05″ surplus!

The high so far today is 67F, which is 2 degrees below the
normal maximum of 69F. The low since midnight is 50F, which is
2 degrees below the normal minimum of 52F.

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Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, thin scattered cirrus
Temperature: 56F; Dew Point: 44F; Relative Humidity: 63%
Wind: SW @ 9 kts
Sea-level pressure: 1009.5 mb; 29.81 in. Hg: rising, then falling
Visibility: 60 miles
6-hr Max temp: 56F
6-hr Min temp: 50F
24-hr Precip: 0.00 inches
BHO SA 1155 140 SCT 250 -SCT 60 095/56/44/2309/981/ 8/051 58008
10056 20050

10 A.M.
Weather: Broken altocumulus/altostratus, overcast cirrostratus,
few stratocumulus distant ESE-SSW
Temperature: 62F; Dew Point: 50F; Relative Humidity: 64%
Wind: SW @ 7 kts
Sea-level pressure: 1009.0 mb; 29.80 in Hg: rising then falling
Visibility: 60 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E140 BKN 200 OVC 60 090/62/50/2307/980/
FEW SC DSNT ESE-SSW/ 8/577 58005

1 P.M.
Weather: Scattered altocumulus/castellanus, broken cirrostratus,
thin overcast cirrus, few cu distant ESE-SSW-W
Temperature: 67F, Dew point: 53F; Relative Humidity: 60%
Wind: SSW @ 10G16 kts
Sea-level pressure: 1006.9 mb; 29.73 in Hg: falling, then more rapidly
Visibility: 50 miles
6-hr Max temp: 67F
6-hr Min temp: 56F
6-hr Precip: 0.00 ins.
BHO SA 1755 100 SCT 200 BKN 250 -OVC 50 069/67/53/2010G16/973/
FEW CU DSNT ESE-SSW-W/ 8/286 58021 10067 20056

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SUMMARY FOR SATURDAY, SEPTEMBER 24, 2022

TEMPERATURE (DEGREES F)
MAX…….68 NORMAL…..70
MIN…….42 NORMAL…..53
MEAN……55 NORMAL…..61

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-6
TOTAL DEPARTURE FOR THE MONTH…………………-25 [-1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY……………10 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE MONTH……………65 DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE SEASON…………..65 DEPARTURE…….-15
TOTAL HEATING UNITS LAST SEASON TO DATE………43 DEPARTURE…….+22

COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………48 DEPARTURE…….-21
TOTAL COOLING UNITS FOR THE SEASON………….884 DEPARTURE……+219
TOTAL COOLING UNITS LAST SEASON TO DATE……..712 DEPARTURE……+172

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….37 NW @ 11:00 A.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..41 @ 11:01 A.M.
DAVIS #2 ………………34 NNW @ 11:01 A.M.
RMY #2 (Instantaneous)…..39 NNW @ 11:01 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………………26 NW @ 1:58 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..25 @ 11:01 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 NNW @ 11:02 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 NNW @ 11:01 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…….14.6 NW [351 total miles] VECTOR #2……………..15.2
DAVIS #2………………15.0 NW
RMY #2………………..14.9 NW
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…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..4.20 DEPARTURE…..+1.05
TOTAL PRECIPITATION FOR THE YEAR…………..27.78 DEPARTURE…..-9.98

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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/+5/0.28/015/02 22 W AERO N/A RMY 22
9/14 78/56/67/+2/0.00/663/88 29 WNW AERO N/A RMY 29
9/15 70/52/61/-4/0.00/713/95 33 NW AERO N/A RMY 33
9/16 70/47/59/-5/0.00/568/76 24 NNW AERO N/A RMY 24
9/17 70/47/59/-5/0.00/684/92 24 SSW AERO N/A RMY 24
9/18 81/57/69/+6/0.04/542/73 28 WSW AERO N/A RMY 29
9/19 66/56/61/-2/0.22/000/00 22 SW AERO N/A RMY 22 TSTM
9/20 63/56/60/-3/0.05/…/.. 19 NW AERO N/A RMY 19
9/21 68/54/61/-1/0.03/…/.. 27 SSW AERO N/A RMY 28
9/22 68/50/59/-3/1.07/…/.. 36 NW AERO N/A RMY 37 TSTM
9/23 59/45/52/-10/0.00/…/.. 48 NNW AERO N/A RMY 48
9/24 68/42/55/-6/0.00/…/.. 37 NW AERO N/A RMY 39