Friday, September 30, 2022

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

FRIDAY, SEPTEMBER 30, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0540E
SUNSET:  1727E

OVERCAST WITH GOOD VISIBILITY THROUGHOUT THE DAY….

Today was cool with a northeasterly breeze around 10 mph.
Conditions were overcast with a thin cirrostratus veil.
Visibility was decent at around 65 miles for most of the day.

Today’s dew points persisted in the mid 40’s, giving us
another comfortable and cool fall day. Pretty close to a
carbon copy of yesterday, yet cooler.

The high so far today is 60F, which is 7 degrees below the
normal maximum of 67F. The low since midnight is 44F, which is
6 degrees below the normal minimum of 50F.

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Today’s Observations:

7 A.M.
Weather: Scattered cumulus, broken altocumulus, overcast
thin cirrostratus
Temperature: 46F; Dew Point: 43F; Relative Humidity: 88%
Wind: NE @ 11 kts
Sea-level pressure: 1028.5 mb; 30.38 in. Hg: rising, then steady
Visibility: 65 miles
6-hr Max temp: 46F
6-hr Min temp: 44F
24-hr Precip: 0.00 inches
BHO SA 1155 40 SCT 110 BKN 250 -OVC 65 285/46/43/0411/038/ 8/857 53004
10046 20044

10 A.M.
Weather: Scattered cumulus, broken altocumulus, overcast
thin cirrostratus
Temperature: 57F; Dew Point: 47F; Relative Humidity: 68%
Wind: ENE @ 7 kts
Sea-level pressure: 1028.6 mb; 30.38 in Hg: rising then falling
Visibility: 60 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 40 SCT 110 BKN 250 -OVC 60 286/57/47/0707/038/ 8/857 50001

1 P.M.
Weather: Scattered cumulus and overcast thin cirrostratus
Temperature: 60F, Dew point: 46F; Relative Humidity: 59%
Wind: ENE @ 7 kts
Sea-level pressure: 1026.1 mb; 30.31 in Hg: falling, then
more rapidly
Visibility: 70 miles
6-hr Max temp: 60F
6-hr Min temp: 46F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 SCT BKN 250 -OVC 70 261/60/46/0707/031/ 8/107
58025 10060 20046

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SUMMARY FOR THURSDAY, SEPTEMBER 29, 2022

TEMPERATURE (DEGREES F)
MAX…….65   NORMAL…..68
MIN…….47   NORMAL…..51
MEAN……56   NORMAL…..59

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-3
TOTAL DEPARTURE FOR THE MONTH…………………-20 [-0.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….9  DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH……………86  DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE SEASON…………..86  DEPARTURE…….-25
TOTAL HEATING UNITS LAST SEASON TO DATE………62  DEPARTURE…….+24

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…….-26
TOTAL COOLING UNITS FOR THE SEASON………….884  DEPARTURE……+215
TOTAL COOLING UNITS LAST SEASON TO DATE……..714  DEPARTURE……+170

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….23 NNW @ 12:16 A.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..23     @ 12:16 A.M.
DAVIS #2 ………………19 NNW @ 12:10 A.M.
RMY #2 (Instantaneous)…..22 NNW @ 12:16 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………………14 NNW @ 12:16 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15     @ 12:17 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 N   @ 12:17 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 NNW @ 12:17 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……..8.3 N [199 total miles] VECTOR #2………………8.9
DAVIS #2……………….8.5 N
RMY #2…………………8.8 N
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…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..4.41 DEPARTURE…..+0.51
TOTAL PRECIPITATION FOR THE YEAR…………..27.99 DEPARTURE….-10.52

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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/-3/0.05/000/00           19 NW   AERO N/A    RMY 19
9/21  68/54/61/-1/0.03/190/26           27 SSW  AERO N/A    RMY 28
9/22  68/50/59/-3/1.07/000/00           36 NW   AERO N/A    RMY 37 TSTM
9/23  59/45/52/-10/0.00/705/97          48 NNW  AERO N/A    RMY 48
9/24  68/42/55/-6/0.00/681/94           37 NW   AERO N/A    RMY 39
9/25  69/50/60/-1/0.01/144/20           28 S    AERO N/A    RMY 28
9/26  73/56/65/+5/0.20/531/74           35 SSW  AERO N/A    RMY 37
9/27  73/53/63/+3/…./…/..           33 SW   AERO N/A    RMY 33
9/28  70/50/60/+1/0.00/…/..           22 W    AERO N/A    RMY 23
9/29  65/47/56/-3/0.00/…/..           23 NNW  AERO N/A    RMY 22

9/30  The low since midnight is 44F, the daily normal low is 50F

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

RECORDS FOR SEPTEMBER 30
HIGH 84F IN 1986
LOW 31F IN 1992
PRECIP 2.44 INCHES IN 2015
PEAK GUST 71 MPH S IN 2020

RECORDS FOR OCTOBER 1
HIGH 85F IN 1927
LOW 30F IN 1992
PRECIP 1.63 INCHES IN 2014
PEAK GUST 68e MPH SSE IN 1977

TODAY’S REPORT PREPARED BY: Benjamin Turner