Tuesday, September 27, 2022

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

TUESDAY, SEPTEMBER 27, 2022
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0537E
SUNSET:  1733E

MORNING CLOUDS GIVE WAY TO PLENTY OF SUNSHINE; WARM AND BREEZY….

A line of showers moved through last evening leaving 0.09″ in
the gauge. It’s nice seeing more instances of rainfall this
month, even if amounts are on the smaller side. It all adds up!

Clouds where the theme this morning before finally sliding off
to the east leaving us with plenty of sunshine this afternoon.
Temperatures have responded nicely with readings getting into
the low to mid 70s. The dew point has dropped off this afternoon
making for a very pleasant feeling air. The dew point was in the
upper 50s this morning, but has dropped into the upper 40s this
afternoon, simply delightful!

A nice breeze picked up late this morning into this afternoon as
well, mainly out of a south-southwesterly direction. The average
speed for the day so far is around 11mph with frequent gusts of
25-30mph. The peak gust for the day so far is 33mph occurring
late this morning.

Visibility has been quite decent all day, averaging between
60-70 miles.

While we’re certainly doing better in terms of rainfall than we
were all summer, we are still running a significant deficit for
the year. The annual deficit is at -10.07 inches, despite the
month of September seeing a +0.96″ surplus!

The high so far today is 72F, which is 4 degrees above the
normal maximum of 68F. The low since midnight is 57F, which is
6 degrees above the normal minimum of 51F.

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Today’s Observations:

7 A.M.
Weather: Broken cirrostratus, few stratocumulus all quadrants,
few altocumulus/castellanus NE-S
Temperature: 59F; Dew Point: 57F; Relative Humidity: 93%
Wind: S @ 6 kts, wind light
Sea-level pressure: 1009.8 mb; 29.82 in. Hg: falling then rising
Visibility: 60 miles, thin fog
6-hr Max temp: 59F
6-hr Min temp: 57F
24-hr Precip: 0.09 inches
BHO SA 1155 E200 BKN 60 098/59/57/1806/982/ FEW SC ALQDS
FEW AC/ACC NE-S THN F ALQDS WND LGT/ 8/586 53004 70009 10059 20057

10 A.M.
Weather: Broken cirrostratus, thin broken cirrus, few stratocumulus
all quadrants, few altocumulus/castellanus NE-S
Temperature: 66F; Dew Point: 54F; Relative Humidity: 65%
Wind: SW @ 5 kts, wind light
Sea-level pressure: 1010.3 mb; 29.83 in Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E200 BKN 250 -BKN 70 103/66/54/2305/983/ FEW SC ALQDS
FEW AC/ACC NE-S WND LGT/ 8/588 51005

1 P.M.
Weather: Clear, few cumulus all quadrants, few cirrus distant NW-NE-S
Temperature: 71F, Dew point: 49F; Relative Humidity: 46%
Wind: SW @ 14G23 kts, peak wind SW 30mph at 12:38 P.M.
Sea-level pressure: 1009.2 mb; 29.80 in Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 72F
6-hr Min temp: 59F
6-hr Precip: 0.00 ins.
BHO SA 1755 CLR 60 092/71/49/2214G23/980/ FEW CU ALQDS
FEW CI DSNT NW-NE-S PK WND 2326/38/ 8/201 58011 10072 20059

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SUMMARY FOR MONDAY, SEPTEMBER 26, 2022

TEMPERATURE (DEGREES F)
MAX…….73   NORMAL…..69
MIN…….56   NORMAL…..52
MEAN……65   NORMAL…..60

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….+5
TOTAL DEPARTURE FOR THE MONTH…………………-21 [-1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2022 THRU JUN 2023)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE MONTH……………70  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE SEASON…………..70  DEPARTURE…….-21
TOTAL HEATING UNITS LAST SEASON TO DATE………44  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…….-23
TOTAL COOLING UNITS FOR THE SEASON………….884  DEPARTURE……+217
TOTAL COOLING UNITS LAST SEASON TO DATE……..714  DEPARTURE……+170

PEAK WIND GUST (MPH):
Official (1-Sec AVG)…….35 SSW @  6:07 P.M.
AEROVANE……………….N/A
VECTOR #2 (Instantaneous)..36     @  6:07 P.M.
DAVIS #2 ………………39 S   @  6:07 P.M.
RMY #2 (Instantaneous)…..37 SSW @  6:07 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 SSW @  3:57 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24     @  6:08 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 S   @  6:09 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 SSW @  4:29 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…….13.3 SW [319 total miles] VECTOR #2……………..13.9
DAVIS #2………………13.7 SW
RMY #2………………..14.0 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……..0.09 DEPARTURE…..-0.05
TOTAL PRECIPITATION FOR THE MONTH…………..4.41 DEPARTURE…..+0.96
TOTAL PRECIPITATION FOR THE YEAR…………..27.99 DEPARTURE….-10.07

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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  The low since midnight is 57F, 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 27
HIGH 86F IN 2017
LOW 32F IN 1947
PRECIP 2.26 INCHES IN 1962
PEAK GUST 100 MPH SSE IN 1985 (HURRICANE GLORIA)

RECORDS FOR SEPTEMBER 28
HIGH 86F IN 2014
LOW 33F IN 1897,1947
PRECIP 2.46 INCHES IN 2004
PEAK GUST 69 MPH NE IN 1962

TODAY’S REPORT PREPARED BY: Matt Douglas