Wednesday, September 1, 2021

| September 1, 2021 | Reply

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

WEDNESDAY, SEPTEMBER 1, 2021
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNRISE: 0508E
SUNSET:  1817E
 
SOME RAIN STARTING UP WITH THE IDA REMNANTS….

After leaving significant damage down south, measurable rainfall
began around 10 A.M. from Ida. So far today we have only measured
0.09 inches, but rain intensified following the 1 P.M. observation.

Visibility was good this morning at 70 miles, but decreased to a
mile as the fog and rainfall moved in.

Wind has been on the lighter side, being almost calm at 10 A.M.

The high so far today is 68F, this is 10 degrees below the daily
normal maximum of 78F. The low so far today is 64F, which is 4
degrees above the daily normal minimum of 60F.


Today’s Observations:

7 A.M.
Weather: Broken altocumulus/altostratus aspiritas, overcast
cirrostratus
Temperature: 65F; Dew Point: 60F; Relative Humidity: 83%
Wind: N @ 7 kts
Sea-level pressure: 1011.3 mb; 29.86 in. Hg; rising, then more rapidly
Visibility: 70 miles, virga to the west
6-hr Max temp: 65F
6-hr Min temp: 64F
24-hr Precip: 0.00 ins.
BHO SA 1155 E70 BKN 140 BKN 250 OVC 70 113/65/60/3607/986/ VIRGA DSNT
W/ 8/077 53015 10065 20064

10 A.M.
Weather: Overcast altocumulus/altostratus, very light rain  
Temperature: 65F; Dew Point: 64F; Relative Humidity: 93%
Wind: Calm
Sea-level pressure: 1012.5 mb; 29.90 in Hg; rising, then more slowly
Visibility: 25 miles, thin fog
3-hr Precip: Trace
BHO SA 1455 E90 OVC 25R- 125/65/64/0000/990/ THN F ALQDS WND CALM
PCPN VRY LGT/ 8/02/ 600// 51012

1 P.M.
Weather: Overcast stratus, rain intensifying from light to
moderate around 12:45 P.M.
Temperature: 64F, Dew point: 64F; Relative Humidity: 100%
Wind: NW @ 3 kts, light and variable
Sea-level pressure: 1019.9 mb; 29.88 in Hg; falling unsteadily
Visibility: 1 mile, fog
6-hr Max temp: 68F
6-hr Min temp: 64F
6-hr Precip: 0.09 ins.
BHO SA 1755 E40 OVC 1RF 119/64/64/3103/988/ R-BCMG R45 WND L/V/ 8/6//
6009/ 56006 10068 20064

SUMMARY FOR TUESDAY, AUGUST 31, 2021

TEMPERATURE (DEGREES F)
MAX…….80     NORMAL…..78
MIN…….65     NORMAL…..60
MEAN……73     NORMAL…..69

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……….. +4
TOTAL DEPARTURE FOR THE MONTH…………………..+72 [+2.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022)
TOTAL HEATING UNITS FOR YESTERDAY…………….0  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………….0  DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE SEASON…………..28  DEPARTURE…….+10
TOTAL HEATING UNITS LAST SEASON TO DATE……….3  DEPARTURE…….+25

COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021)
TOTAL COOLING UNITS FOR YESTERDAY…………….8  DEPARTURE……..+3
TOTAL COOLING UNITS FOR THE MONTH…………..271  DEPARTURE…….+62
TOTAL COOLING UNITS FOR THE SEASON………….650  DEPARTURE…….+54
TOTAL COOLING UNITS LAST SEASON TO DATE……..757  DEPARTURE……-107

PEAK WIND GUST (MPH):
                     Official……………….27 WNW @  3:15 P.M.
                     AEROVANE (south tower)…..28 WNW @  3:15 P.M.
                     VECTOR #2 (south tower)….29     @  3:15 P.M.
                     DAVIS #2 (south tower)…..27 W   @  3:15 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…………OUT OF SERVICE D/T RENOVATIONS  
                     MERLIN………OUT OF SERVICE D/T RENOVATIONS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 WNW @  3:26 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19     @  3:26 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 WNW @  3:26 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 AVERAGE……..OUT OF SERVICE D/T RENOVATIONS

AVERAGE WIND SPEED AND DIRECTION:
                     CONTACTING/OFFICIAL……..9.8 W  [236 total miles]
                     VECTOR #2……………..10.8
                     DAVIS #2………………10.8 WNW
                     RMY……………..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….-0.11
TOTAL PRECIPITATION FOR THE MONTH………….5.37  DEPARTURE….+1.46
TOTAL PRECIPITATION FOR THE YEAR………….40.34  DEPARTURE….+5.99

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

08/01   77/58/68/-5/T/589/68             23 SSW AERO 24 SSW RMY N/A
08/02   78/61/70/-3/T/821/95             28 WNW AERO 28 WNW RMY N/A
08/03   76/60/68/-5/0.00/302/35          15 N   AERO 16 N   RMY N/A
08/04   75/61/68/-5/0.71/077/09          21 ESE AERO 21 ESE RMY N/A
08/05   68/61/65/-8/1.68/000/00          28 NE  AERO 28 NE  RMY N/A
08/06   85/62/74/+1/0.00/727/85          19 S   AERO 20 WSW RMY N/A
08/07   88/66/77/+4/0.00/520/61          23 SW  AERO 23 SW  RMY N/A
08/08   80/67/74/+2/T/128/15             16 SW  AERO 16 WNW RMY N/A
08/09   75/64/70/-2/0.25/076/09          22 ENE AERO 21 NE  RMY N/A
08/10   78/63/71/-1/0.12/203/24          19 S   AERO 20 S   RMY N/A
08/11   89/70/80/+8/0.00/667/79          29 SSW AERO 28 SSW RMY N/A
08/12   91/71/81/+9/T/580/69             36 WSW AERO 37 WSW RMY N/A TSTM
08/13   92/73/83/+11/0.00/696/83         18 WSW AERO 18 WSW RMY N/A
08/14   87/69/78/+6/T/601/72             25 W   AERO 25 NNW RMY N/A
08/15   80/62/71/-1/0.00/800/96          19 NNW AERO 20 NNW RMY N/A
08/16   78/59/69/-3/0.00/564/68          15 S   AERO 15 S   RMY N/A
08/17   82/63/73/1/0.00/555/67           22 SSW AERO 23 SSW RMY N/A
08/18   86/66/76/+5/0.00/338/41          21 SSW AERO 22 SSW RMY N/A
08/19   81/69/75/+4/0.62/222/27          41 S   AERO 43 S   RMY N/A
08/20   78/70/74/+3/0.01/…/..          21 WSW AERO N/A    RMY N/A
08/21   86/69/78/+7/0.00/…/..          17 S   AERO 17 S   RMY N/A
08/22   74/66/70/-1/0.78/…/..          47 ESE AERO 48 ESE RMY N/A
08/23   83/68/76/+5/1.17/…/..          25 SSE AERO 26 SSE RMY N/A TSTM
08/24   86/67/77/+6/0.01/…/..          21 NNW AERO 21 NNW RMY N/A
08/25   89/70/80/+10/0.00/…/..         17 SW  AERO 18 SW  RMY N/A
08/26   92/72/82/+12/0.00/…/..         19 WSW AERO 18 WSW RMY N/A
08/27   89/70/80/+10/T/…/..            30 ENE AERO 30 ENE RMY N/A
08/28   70/59/65/-5/0.02/…/..          34 ENE AERO 34 ENE RMY N/A
08/29   72/59/66/-4/T/…/..             20 S   AERO 21 S   RMY N/A
08/30   84/67/76/+7/0.00/…/..          25 SW  AERO 26 SW  RMY N/A
08/31   80/65/73/+4/0.00/…/..          27 WNW AERO 28 WNW RMY N/A

09/01   The low since midnight is 64F, the daily normal low is 60F

RECORDS FOR THE MONTH

08/22 NEW PEAK GUST RECORD OF 47 MPH,
      BEATING THE OLD RECORD OF 44 MPH IN 1987

DAILY EXTREMES

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

RECORDS FOR SEPTEMBER 1
HIGH 93F IN 1969, 2010
LOW 47F IN 1975, 2017
PRECIP 2.32 INCHES IN 2013
PEAK GUST 59e MPH S IN 1945, SSW IN 1965

RECORDS FOR SEPTEMBER 2
HIGH 99F IN 1953 (SEPTEMBER MAXIMUM RECORD)
LOW 44F IN 1909
PRECIP 2.73 INCHES IN 1947
PEAK GUST 55e MPH WNW IN 1944

TODAY’S REPORT PREPARED BY: Benjamin Turner

Category: Daily Discussions

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