Tuesday, October 13, 2020

| October 13, 2020 | Reply

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

TUESDAY, OCTOBER 13, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

FINALLY, A SOAKING RAINFALL ACROSS THE AREA!…

We’ve longed to say it, and we finally can, today has
been a wet day! Rain started shortly after 2:30 A.M.
this morning and has continued at varying rates through
the day. At times its just a light drizzle while at other
times we get a bit of a downpour. All in all it’s the
perfect kind of rain where it comes somewhat slow and
steady, which allows it to soak in nicely.

Through 1 P.M. this afternoon we’ve measured a total of
0.79″. With some heavier elements having moved through
since the observation, we’ve likely approached, if not
exceeded an inch since then. A good soaking that is
much needed!

It has also been breezy most of the day with a gradually
backing wind from east this morning to northeast this
afternoon. The peak gust for the day thus far is 32 mph.

The high so far today is 57, 4 degrees below the daily
normal of 61F. The low since midnight is 50F, which is
6 degrees above the normal low of 44F.

PRELIMINARY STATS FOR SEPTEMBER 2020

TEMPERATURE, Deg. F
Avg. Max. 73.2 [+1.6]
Avg. Min. 54.9 [+0.3]
Mean      64.1 [+1.0]
24-hour corrected mean: 63.6
Max. for month: 82F on the 8th
Min. for month: 39F on the 22nd

HEATING DEGREE DAYS
Total heating units:    95 [-22]
Total for the season:   98 [-44]
Total for last season:  93

COOLING DEGREE DAYS
Total cooling units:     73  [+13]
Total for the season:   830  [+233]
Total for last season:  680

PRECIPITATION, Inches
Total: 1.61 [-2.45]
Greatest in 24 hrs: 1.02 ins. on 29th-30th

WIND, mph
Avg. uncorrected wind speed: 10.6 mph
Avg. corrected wind speed:   11.1 mph
Prevailing wind direction:   S [20%]
Peak gust and direction:     71 S on the 30th

SUNSHINE:
Campbell-Stokes card minutes: 12150 minutes of a possible 21582 or 56%
Astronomical total minutes: 12593 minutes of a possible 22403 or 56%

Today’s Observations:

7 A.M.
Weather: Overcast stratus, light drizzle
Temperature: 53F; Dew Point: 51F; Relative Humidity: 93%
Wind: E at 17 kts, peak wind E 26 kts at 6:01 A.M.
Sea-level pressure: 30.06 ins. Hg: falling, then more slowly
Visibility: 2 miles, fog
6-hr Max temp: 53F
6-hr Min temp: 50F
24-hr Precip: 0.32 ins.
BHO SA 1155 E1 OVC 2L-F 178/53/51/0817/006/ PK WND 0826/01/ 8/6//
56014 6032 70032 10053 20050

10 A.M.
Weather: Sky obscured, vertical visibility 300 feet, light rain
Temperature: 55F; Dew Point: 55F; Relative Humidity: 100%
Wind: ENE at 15G21 kts
Sea-level pressure: 30.01 ins. Hg: falling, then more rapidly
Visibility: 1 mile, fog
3-hr Precip: 0.22 ins.
BHO SA 1455 X W3 1R-F 163/55/55/0715G21/001/ 8//// 58015 6022

1 P.M.
Weather: Sky obscured, vertical visibility 200 feet, light drizzle
Temperature: 56F; Dew Point: 56F; Relative Humidity: 100%
Wind: ENE at 13 kts
Sea-level pressure: 29.89 ins. Hg: falling, then more rapidly
Visibility: 1/2 mile, fog
6-hr Max temp: 57F
6-hr Min temp: 53F
6-hr Precip: 0.47
BHO SA 1755 X W2 1/2L-F 122/56/56/0613/989/ 8//// 58041 6047
10057 20053

SUMMARY FOR MONDAY, OCTOBER 12, 2020

TEMPERATURE (DEGREES F)
MAX…..52   NORMAL…..62
MIN…..48   NORMAL…..44
MEAN….50   NORMAL…..53

DEPARTURE FROM 30-YEAR NORMAL……………. -3
TOTAL DEPARTURE FOR THE MONTH…………….+22 [+1.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY………….15  DEPARTURE….. +3
TOTAL HEATING UNITS FOR THE MONTH………….99  DEPARTURE…..-26
TOTAL HEATING UNITS FOR THE SEASON………..197  DEPARTURE…..-70
TOTAL HEATING UNITS LAST SEASON TO DATE……225  DEPARTURE…..-28

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………. 0  DEPARTURE…… 0
TOTAL COOLING UNITS FOR THE MONTH…………. 1  DEPARTURE….. -3
TOTAL COOLING UNITS FOR THE SEASON………..831  DEPARTURE….+230
TOTAL COOLING UNITS LAST SEASON TO DATE……682  DEPARTURE….+149

PEAK WIND GUST FOR YESTERDAY (MPH)
420C/Official……………28 E   AT   4:52 P.M.
AEROVANE………………..27 E   AT   9:11 P.M.
ASOS……………………29 ENE AT   4:53 P.M.
DAVIS #1………………..29 E   AT   4:52 P.M.
DAVIS #2………………..27 E   AT   9:44 A.M.
RMY N/A  MERLIN N/A
FASTEST MILE FOR YESTERDAY…………………23 ENE AT  11:44 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………21 ENE AT  11:45 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………..22 E   AT  11:45 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………..21 ENE AT  11:45 A.M.
AVERAGE WIND SPEED AND DIRECTION………….14.0 ENE (337 total miles)
ASOS………………….13.8
DAVIS #1………………14.7 E [093 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.32  DEPARTURE….+0.17
ASOS…………..0.33
TOTAL PRECIPITATION FOR THE MONTH……….0.48  DEPARTURE….-1.31
ASOS…………..0.45
TOTAL PRECIPITATION FOR THE YEAR……….34.90  DEPARTURE….-5.97
ASOS………….35.66

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

09/01  76/59/68/0/0.00/698/88              22 SSE  AERO 21 SE   RMY 20
09/02  69/59/64/-4/0.18/102/13             23 SSE  AERO 23 SSE  RMY 24
09/03  75/66/71/+4/0.04/000/00             22 SSW  AERO 21 SSW  RMY N/A
09/04  82/62/72/+5/0.00/763/98             26 WNW  AERO 26 WNW  RMY 25
09/05  76/55/66/-1/0.00/760/98             25 W    AERO 25 W    RMY 24
09/06  78/58/68/+1/0.00/356/46             24 W    AERO 24 W    RMY N/A
09/07  79/61/70/+4/0.00/632/82             27 SSE  AERO 30 SSE  RMY 28
09/08  82/61/72/+6/0.00/545/71             17 S    AERO 16 S    RMY 17
09/09  80/62/71/+5/0.00/214/28             16 S    AERO 15 S    RMY 16
09/10  81/69/75/+10/0.28/015/02            21 SSW  AERO 21 SSW  RMY N/A
09/11  72/55/64/-1/0.01/152/20             25 N    AERO 25 N    RMY N/A
09/12  68/51/60/-5/0.00/666/88             21 ENE  AERO 21 ENE  RMY 21
09/13  74/53/64/0/0.00/611/81              26 SSW  AERO 26 SSW  RMY 26
09/14  74/50/62/-2/0.00/511/68             29 NNW  AERO 33 NNW  RMY 30
09/15  64/44/54/-10/0.00/583/78            18 S    AERO 18 S    RMY N/A
09/16  72/49/61/-2/0.00/603/81             31 SSW  AERO 31 SSW  RMY 31
09/17  76/57/67/+4/0.00/453/61             26 WSW  AERO 28 W    RMY N/A
09/18  64/48/56/-6/0.00/163/22             28 NE   AERO 30 NNW  RMY N/A
09/19  59/42/51/-11/0.00/722/98            23 N    AERO 23 N    RMY N/A
09/20  58/40/49/-13/0.00/602/82            25 NE   AERO 25 NE   RMY 27
09/21  61/41/51/-10/0.00/694/95            29 NE   AERO 27 NE   RMY 29
09/22  63/39/51/-10/0.00/022/03            28 NNW  AERO 30 NNW  RMY 29
09/23  78/50/64/+4/0.00/617/85             31 NW   AERO 32 WNW  RMY 32
09/24  76/57/67/+7/0.00/347/48             20 SW   AERO 18 WSW  RMY 19
09/25  77/57/67/+7/0.00/655/91             18 ENE  AERO 18 WSW  RMY N/A
09/26  77/57/67/+8/0.00/516/72             21 S    AERO 21 S    RMY 21
09/27  79/64/72/+13/0.01/121/17            24 S    AERO 25 S    RMY 24
09/28  78/64/71/+13/0.07/199/28            24 SSE  AERO 24 S    RMY 25
09/29  76/62/69/+11/0.01/234/33            30 S    AERO 30 S    RMY N/A
09/30  72/56/64/+6/1.01/395/56             71 S    AERO 88 S    RMY N/A

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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

10/01  75/56/66/+9/0.00/…/..             28 SW   AERO 28 SW   RMY N/A
10/02  63/49/56/-1/0.02/…/..             20 NW   AERO 21 NW   RMY 20
10/03  65/45/55/-1/0.00/…/..             19 WNW  AERO 19 WNW  RMY 19
10/04  65/45/55/-1/0.00/…/..             17 ESE  AERO 18 ESE  RMY 18
10/05  62/52/57/+1/0.00/…/..             17 ENE  AERO 17 ENE  RMY N/A
10/06  69/51/60/+5/0.00/…/..             28 S    AERO 28 S    RMY 29
10/07  73/50/62/+7/0.14/…/..             76 W    AERO 74 W    RMY 70  TSTM
10/08  61/42/52/-2/0.00/…/..             41 W    AERO 41 W    RMY N/A
10/09  60/37/49/-5/0.00/…/..             25 SSW  AERO 28 SSW  RMY N/A
10/10  75/52/64/+10/0.00/…/..            40 SSW  AERO 40 SSW  RMY 38
10/11  64/47/56/+3/0.00/…/..             32 NNW  AERO 35 NNW  RMY N/A
10/12  52/48/50/-3/T/…/..                28 E    AERO 27 E    RMY N/A

10/13  The low since midnight is 50F, the daily normal low is 44F

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

RECORDS FOR OCTOBER 13
HIGH 84F IN 1930,1954
LOW 29F IN 2012
PRECIP 5.92 INCHES IN 1895
SNOWFALL 4.2 INCHES IN 1934
PEAK GUST 46e MPH W IN 1950

RECORDS FOR OCTOBER 14
HIGH 79F IN 2000
LOW 28F IN 1958
PRECIP 2.69 INCHES IN 1990
SNOWFALL 2.0 INCHES IN 1913
PEAK GUST 63e W IN 1976

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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