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Wednesday, October 14, 2020

October 14, 2020

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, OCTOBER 14, 2020 ALL TIMES ARE…

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

WEDNESDAY, OCTOBER 14, 2020
ALL TIMES ARE IN EASTERN STANDARD TIME

A CRYSTAL CLEAR DAY FOLLOWING SOME MUCH-NEEDED
RAINFALL….

Yesterday was the first time in a while that we’ve had
a good rain storm! The total for the whole event was
1.74 inches, with the majority of it falling yesterday.
This evens out our monthly departure, but the annual
departure of -4.69 inches still looms.

Today we’ve had mostly clear skies, with a visibility
of 80 miles at the 1 P.M. observation. Wind is about
15 mph on average from the west, with a max gust of
22 mph so far. Dew points are in the mid 40’s, and
the afternoon humidity is 44%.

The high so far today is 66, 5 degrees above the daily
normal of 61F. The low since midnight is 47F, which is
4 degrees above the normal low of 43F.

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: Clear
Temperature: 49F; Dew Point: 48F; Relative Humidity: 98%
Wind: WNW at 10G17 kts
Sea-level pressure: 29.86 ins. Hg: rising steadily
Visibility: 65 miles, fog
6-hr Max temp: 49F
6-hr Min temp: 47F
24-hr Precip: 1.42 ins.
BHO SA 1155 CLR 65 112/49/48/3010G17/986/ 70142 53020 10049
20047

10 A.M.
Weather: Clear
Temperature: 58F; Dew Point: 49F; Relative Humidity: 72%
Wind: WNW at 8 kts
Sea-level pressure: 29.90 ins. Hg: rising steadily
Visibility: 75 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 75 125/58/49/3008/990/ 51013

1 P.M.
Weather: Clear, few distant cumulus
Temperature: 65F; Dew Point: 43F; Relative Humidity: 44%
Wind: W at 9 kts
Sea-level pressure: 29.90 ins. Hg: rising steadily
Visibility: 80 miles
6-hr Max temp: 49F
6-hr Min temp: 66F
6-hr Precip: 0.00
BHO SA 1755 CLR 80 126/65/43/2709/990/ FEW CU DSNT ALQDS/ 8/100
50001 10066 20049

SUMMARY FOR TUESDAY, OCTOBER 13, 2020

TEMPERATURE (DEGREES F)
MAX…..57   NORMAL…..61
MIN…..49   NORMAL…..44
MEAN….53   NORMAL…..53

DEPARTURE FROM 30-YEAR NORMAL……………. 0
TOTAL DEPARTURE FOR THE MONTH…………….+22 [+1.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY………….12  DEPARTURE….. -1
TOTAL HEATING UNITS FOR THE MONTH…………111  DEPARTURE…..-27
TOTAL HEATING UNITS FOR THE SEASON………..209  DEPARTURE…..-71
TOTAL HEATING UNITS LAST SEASON TO DATE……233  DEPARTURE…..-24

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……………32 E   AT   7:10 A.M.
AEROVANE………………..33 E   AT   6:34 A.M.
ASOS……………………34 ENE AT   7:10 A.M.
DAVIS #1………………..33 E   AT   7:10 A.M.
DAVIS #2………………..29 E   AT   7:10 A.M.
RMY N/A  MERLIN N/A
FASTEST MILE FOR YESTERDAY…………………23 ENE AT   5:46 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………23 E   AT   7:14 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………..23 E   AT   6:02 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………..23 E   AT   6:02 A.M.
AVERAGE WIND SPEED AND DIRECTION………….14.6 ENE (351 total miles)
ASOS………………….15.1
DAVIS #1………………15.0 ENE [060 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….1.90  DEPARTURE….+1.27
ASOS…………..1.91
TOTAL PRECIPITATION FOR THE MONTH……….1.90  DEPARTURE….-0.03
ASOS…………..1.91
TOTAL PRECIPITATION FOR THE YEAR……….36.32  DEPARTURE….-4.69
ASOS………….37.12

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  57/49/53/0/1.74/…/..              32 E    AERO 33 E    RMT N/A

10/14  The low since midnight is 47F, the daily normal low is 43F

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

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

RECORDS FOR OCTOBER 15
HIGH 83F IN 1897
LOW 29F IN 1887,1937
PRECIP 4.58 INCHES IN 2005
SNOWFALL TRACE IN 1961,1972
PEAK GUST 69 MPH W IN 2003

TODAY’S REPORT PREPARED BY: Benjamin Turner

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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