Thursday, September 29, 2022

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

THURSDAY, SEPTEMBER 29, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0539E
SUNSET:  1729E

COOL AND FALL-LIKE WITH CONDITIONS BECOMING MORE CLOUDY
IN THE AFTERNOON HOURS….

Today was cool with a northerly breeze around 10 mph.
Conditions were mostly clear with skies becoming cloudier
around noontime. Visibility was decent at around 75 miles
for most of the day.

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

The high so far today is 64F, which is 4 degrees below the
normal maximum of 68F. The low since midnight is 47F, which is
4 degrees below the normal minimum of 51F.

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Today’s Observations:

7 A.M.
Weather: Clear, few cirrus
Temperature: 50F; Dew Point: 46F; Relative Humidity: 86%
Wind: N @ 8 kts
Sea-level pressure: 1026.3 mb; 30.31 in. Hg: rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 52F
6-hr Min temp: 47F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 70 263/50/46/3608/031/ FEW CI ALQDS/ 8/002 51014 10052 20047

10 A.M.
Weather: Scattered cumulus and cirrus
Temperature: 62F; Dew Point: 46F; Relative Humidity: 55%
Wind: N @ 7 kts
Sea-level pressure: 1027.5 mb; 30.35 in Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 40 SCT 250 SCT 70 275/62/46/3607/035/ 8/102 51012

1 P.M.
Weather: Broken cumulus and cirrus
Temperature: 61F, Dew point: 48F; Relative Humidity: 67%
Wind: NE @ 7 kts
Sea-level pressure: 1027.0 mb; 30.33 in Hg: falling unsteadily
Visibility: 80 miles
6-hr Max temp: 64F
6-hr Min temp: 50F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 BKN 250 BKN 80 270/61/48/0407/033/ 8/202 57005 10064 20050

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SUMMARY FOR WEDNESDAY, SEPTEMBER 28, 2022

TEMPERATURE (DEGREES F)
MAX…….70   NORMAL…..68
MIN…….50   NORMAL…..51
MEAN……60   NORMAL…..59

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+1
TOTAL DEPARTURE FOR THE MONTH…………………-17 [-0.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….5  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH……………77  DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE SEASON…………..77  DEPARTURE…….-27
TOTAL HEATING UNITS LAST SEASON TO DATE………51  DEPARTURE…….+26

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…….-25
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)…….22 W   @ 10:12 A.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..23     @ 10:12 A.M.
DAVIS #2 ………………21 WNW @ 10:46 A.M.
RMY #2 (Instantaneous)…..23 WNW @ 12:18 P.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………………13 WNW @ 11:08 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15     @ 10:15 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 WNW @ 11:05 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 W   @ 10:15 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……..9.0 W [215 total miles] VECTOR #2………………9.7
DAVIS #2……………….9.7 WNW
RMY #2…………………9.6 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…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..4.41 DEPARTURE…..+0.66
TOTAL PRECIPITATION FOR THE YEAR…………..27.99 DEPARTURE….-10.37

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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  The low since midnight is 47F, the daily normal low is 51F

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

RECORDS FOR SEPTEMBER 29
HIGH 85F IN 1952
LOW 28F IN 1914 (SEPTEMBER MINIMUM RECORD)
PRECIP 2.61 INCHES IN 1907
PEAK GUST 62 MPH S IN 2005

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

TODAY’S REPORT PREPARED BY: Benjamin Turner