Thursday, September 22, 2022

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

THURSDAY, SEPTEMBER 22, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0532E
SUNSET:  1741E

SOME THUNDERSTORMS THIS MORNING WITH STEADY RAINFALL THROUGH
THE REST OF THE DAY….

We observed some thunderstorms that passed through this morning,
leaving 0.32 inches by 10 A.M. There was a steadier rainfall
that started around 11 A.M., leaving us with 0.87 inches by the
1 P.M. observation.

Wind was cool and westerly at around 20 mph, with frequent gusts
in the mid to upper 20’s. Visibility was limited, being 10 miles
at most before the thunderstorms passed through this morning.

The high so far today is 68F, which is 2 degrees below the
normal maximum of 70F. The low since midnight is 60F, which is
3 degrees below the normal minimum of 63F.

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Today’s Observations:

7 A.M.
Weather: Overcast altostratus, few stratus fractus
Temperature: 66F; Dew Point: 66F; Relative Humidity: 100%
Wind: S @ 15G23 kts
Sea-level pressure: 1002.6 mb; 29.61 in. Hg: falling, then
more rapidly
Visibility: 10 miles, thin fog
6-hr Max temp: 66F
6-hr Min temp: 62F
24-hr Precip: Trace
BHO SA 1155 110 OVC 10 026/66/66/1815G23/961/ FEW STFRA ALQDS THN
F ALQDS/ 8/62/ 58022 70000 10066 20062

10 A.M.
Weather: Fog
Temperature: 65F; Dew Point: 65F; Relative Humidity: 100%
Wind: SSE @ 8G20 kts
Sea-level pressure: 1000.4 mb; 29.39 in Hg: falling unsteadily
Visibility: 1/16th mile, fog
3-hr Precip: 0.32 ins.
BHO SA 1455 X W3 1/16F 004/65/65/1508G20/939/ 8//// 57022 6032/

1 P.M.
Weather: Rain, broken cumulus fractus and overcast
nimbostratus
Temperature: 67F, Dew point: 67F; Relative Humidity: 100%
Wind: WNW @ 17G23 kts
Sea-level pressure: 998.1 mb; 29.32 in Hg: falling, then
more rapidly
Visibility: 1 mile, fog
6-hr Max temp: 68F
6-hr Min temp: 65F
6-hr Precip: 0.87 ins.
BHO SA 1755 30 BKN 80 OVC 1RF 981/67/67/3017G23/932/ 8/72/
57023 6087/ 10068 20065

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SUMMARY FOR WEDNESDAY, SEPTEMBER 21, 2022

TEMPERATURE (DEGREES F)
MAX…….68   NORMAL…..71
MIN…….54   NORMAL…..54
MEAN……61   NORMAL…..62

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-1
TOTAL DEPARTURE FOR THE MONTH………………….-6 [-0.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….4  DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH……………36  DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE SEASON…………..36  DEPARTURE…….-29
TOTAL HEATING UNITS LAST SEASON TO DATE………43  DEPARTURE……..-7

COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE MONTH……………48  DEPARTURE…….-17
TOTAL COOLING UNITS FOR THE SEASON………….884  DEPARTURE……+223
TOTAL COOLING UNITS LAST SEASON TO DATE……..696  DEPARTURE……+188

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….27 SSW @ 11:30 P.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..28     @ 11:58 P.M.
DAVIS #2 ………………26 S   @  7:13 P.M.
RMY #2 (Instantaneous)…..28 SSW @ 11:30 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………………21 SSW @ 11:30 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21     @ 11:30 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 SSW @ 11:30 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 SSW @ 11:30 P.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……..7.2 SSW [173 total miles] VECTOR #2………………7.7
DAVIS #2……………….7.4 SW
RMY #2…………………7.9 SW
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…….TRACE DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..3.13 DEPARTURE…..+0.42
TOTAL PRECIPITATION FOR THE YEAR…………..26.71 DEPARTURE….-10.61

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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/…./…/..           19 NW   AERO N/A    RMY 19
9/21  68/54/61/-1/…./…/..           27 SSW  AERO N/A    RMY 28

9/22  The low since midnight is 60F, the daily normal low is 53F

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

RECORDS FOR SEPTEMBER 22
HIGH 90F IN 1895, 1914
LOW 30F IN 1904 (Earliest freeze)
PRECIP 1.16 INCHES IN 2001
PEAK GUST 60 MPH SSW IN 1989

RECORDS FOR SEPTEMBER 23
HIGH 93F IN 1895,1914
LOW 33F IN 1904
PRECIP 2.67 INCHES IN 1994
PEAK GUST 62 MPH SSW IN 1989

TODAY’S REPORT PREPARED BY: Benjamin Turner