Friday, September 23, 2022

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

FRIDAY, SEPTEMBER 23, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0533E
SUNSET:  1740E

COOL AND BREEZY WITH EXCELLENT VISIBILITY ATOP GREAT BLUE HILL….

Today exemplified cool and gorgeous fall weather with an
excellent visibility of 85 miles and a refreshing northerly
breeze. Wind was 15 mph on average with frequent gusts around
30 mph. This is indicative of a significant air mass change
between today’s cool and dry air mass and the rainy weather
of yesterday. By the way, we received 1.07 inches of rainfall
from yesterday’s events.

This brings our monthly rain total to 4.20 inches, and our
annual total to 27.78 inches! We now have a monthly rain
surplus of 1.34 inches, but an annual deficit of -9.69 inches.
We are still in a severe drought, at least.

The high so far today is 59F, which is 11 degrees below the
normal maximum of 70F. The low since midnight is 45F, which is
8 degrees below the normal minimum of 53F.

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Today’s Observations:

7 A.M.
Weather: Clear, few small cumulus
Temperature: 47F; Dew Point: 42F; Relative Humidity: 82%
Wind: S @ 14G30 kts, peak of 35 mph at 6:52 A.M.
Sea-level pressure: 1008.3 mb; 29.78 in. Hg: rising, then
more slowly
Visibility: 85 miles
6-hr Max temp: 49F
6-hr Min temp: 45F
24-hr Precip: 1.07 inches
BHO SA 1155 CLR 85 083/47/42/3414G30/978/ FEW SML CU ALQDS
PK WND 3430/52/ 8/100 51015 70107 10049 20045

10 A.M.
Weather: Scattered cumulus
Temperature: 53F; Dew Point: 41F; Relative Humidity: 63%
Wind: NNW @ 12G21 kts, peak of 37 mph NNW at 8:57 A.M.
Sea-level pressure: 1008.7 mb; 29.82 in Hg: rising unsteadily
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 30 SCT 85 087/53/41/3412G21/982/ PK WND 3432/1357/
8/100 52004

1 P.M.
Weather: Broken cumulus
Temperature: 59F, Dew point: 40F; Relative Humidity: 49%
Wind: NW @ 13G27 kts, peak of 31 mph NW at 12:46 P.M.
Sea-level pressure: 1007.7 mb; 29.79 in Hg: falling unsteadily
Visibility: 85 miles
6-hr Max temp: 59F
6-hr Min temp: 47F
6-hr Precip: 0.00 ins.
BHO SA 1755 30 BKN 85 077/59/40/3113G27/979/ PK WND 3127/46/
8/100 57010 10059 20047

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SUMMARY FOR THURSDAY, SEPTEMBER 22, 2022

TEMPERATURE (DEGREES F)
MAX…….68   NORMAL…..70
MIN…….50   NORMAL…..53
MEAN……59   NORMAL…..62

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….-3
TOTAL DEPARTURE FOR THE MONTH………………….-9 [-0.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….6  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH……………42  DEPARTURE…….-10
TOTAL HEATING UNITS FOR THE SEASON…………..42  DEPARTURE…….-28
TOTAL HEATING UNITS LAST SEASON TO DATE………43  DEPARTURE……..-1

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…….-18
TOTAL COOLING UNITS FOR THE SEASON………….884  DEPARTURE……+222
TOTAL COOLING UNITS LAST SEASON TO DATE……..701  DEPARTURE……+183

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….36 NW  @  1:52 P.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..37     @  1:52 P.M.
DAVIS #2 ………………33 NNW @  1:52 P.M.
RMY #2 (Instantaneous)…..37 NW  @  1:52 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………………26 NW  @  1:58 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..25     @  1:23 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 NW  @  1:23 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 NW  @  1:23 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…….13.8 SSW [332 total miles] VECTOR #2……………..14.3
DAVIS #2………………13.8 WSW
RMY #2………………..14.4 WSW
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……..1.07 DEPARTURE…..+0.92
TOTAL PRECIPITATION FOR THE MONTH…………..4.20 DEPARTURE…..+1.34
TOTAL PRECIPITATION FOR THE YEAR…………..27.78 DEPARTURE…..-9.69

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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  68/50/59/-3/…./…/..           36 NW   AERO N/A    RMY 37 TSTM

9/23  The low since midnight is 45F, 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 23
HIGH 93F IN 1895,1914
LOW 33F IN 1904
PRECIP 2.67 INCHES IN 1994
PEAK GUST 62 MPH SSW IN 1989

RECORDS FOR SEPTEMBER 24
HIGH 87F IN 1959
LOW 33F IN 1885,1950,1963
PRECIP 1.19 INCHES IN 1955
PEAK GUST 54e MPH SW IN 1940

TODAY’S REPORT PREPARED BY: Benjamin Turner