Saturday, September 24, 2022

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

SATURDAY, SEPTEMBER 24, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0534E
SUNSET:  1738E

ANOTHER BEAUTIFUL FALL DAY ON THE SUMMIT….

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
25 mph. Sky conditions were mostly clear, consisting of a few
cirrus clouds.

The monthly rain total is still 4.20 inches, and our
annual total to 27.78 inches! We now have a monthly rain
surplus of 1.19 inches, but an annual deficit of -9.84 inches.
We are still in a severe drought, at the least.

The high so far today is 67F, which is 3 degrees below the
normal maximum of 70F. The low since midnight is 42F, which is
11 degrees below the normal minimum of 53F.

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Today’s Observations:

7 A.M.
Weather: Clear, few cirrus
Temperature: 46F; Dew Point: 35F; Relative Humidity: 69%
Wind: NW @ 15G22 kts
Sea-level pressure: 1011.8 mb; 29.88 in. Hg: rising, then
more rapidly
Visibility: 85 miles
6-hr Max temp: 46F
6-hr Min temp: 42F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 85 118/46/35/3115G22/988/ FEW CI ALQDS/
8/002 53008 10046 20042

10 A.M.
Weather: Clear, few cirrus
Temperature: 59F; Dew Point: 35F; Relative Humidity: 40%
Wind: NW @ 10G22 kts
Sea-level pressure: 1011.7 mb; 29.88 in Hg: rising then falling
Visibility: 85 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 85 117/59/35/3110G22/988/ FEW CI ALQDS/ 8/002
50001

1 P.M.
Weather: Clear, few cirrus
Temperature: 67F, Dew point: 36F; Relative Humidity: 31%
Wind: NW @ 17G24 kts
Sea-level pressure: 1010.6 mb; 29.85 in Hg: falling unsteadily
Visibility: 85 miles
6-hr Max temp: 67F
6-hr Min temp: 46F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 85 106/67/36/3117G24/985/ FEW CI ALQDS/ 8/002
57011 10067 20046

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SUMMARY FOR FRIDAY, SEPTEMBER 23, 2022

TEMPERATURE (DEGREES F)
MAX…….59   NORMAL…..70
MIN…….45   NORMAL…..53
MEAN……52   NORMAL…..62

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………-10
TOTAL DEPARTURE FOR THE MONTH…………………-19 [-1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….6  DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE MONTH……………55  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON…………..55  DEPARTURE…….-20
TOTAL HEATING UNITS LAST SEASON TO DATE………43  DEPARTURE…….+12

COOLING DEGREE DAYS (SEASON: JAN 2022 THRU DEC 2022)
TOTAL COOLING UNITS FOR YESTERDAY……………13  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………48  DEPARTURE…….-20
TOTAL COOLING UNITS FOR THE SEASON………….884  DEPARTURE……+221
TOTAL COOLING UNITS LAST SEASON TO DATE……..708  DEPARTURE……+176

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….48 NNW @  4:33 P.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..51     @  4:33 P.M.
DAVIS #2 ………………43 NNW @  4:33 P.M.
RMY #2 (Instantaneous)…..48 NNW @  4:33 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………………31 NNW @  4:33 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..31     @  4:49 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………30 NNW @  4:49 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..30 NNW @  4:49 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…….16.9 NNW [406 total miles] VECTOR #2……………..16.7
DAVIS #2………………16.3 NNW
RMY #2………………..16.2 NNW
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…………..4.20 DEPARTURE…..+1.19
TOTAL PRECIPITATION FOR THE YEAR…………..27.78 DEPARTURE…..-9.84

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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  59/45/52/-10/…./…/..          48 NNW  AERO N/A    RMY 48

9/24  The low since midnight is 42F, 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 24
HIGH 87F IN 1959
LOW 33F IN 1885,1950,1963
PRECIP 1.19 INCHES IN 1955
PEAK GUST 54e MPH SW IN 1940

RECORDS FOR SEPTEMBER 25
HIGH 87F IN 1970
LOW 31F IN 1950
PRECIP 2.68 INCHES IN 1961
PEAK GUST 63 MPH SSW IN 1991

TODAY’S REPORT PREPARED BY: Benjamin Turner