Wednesday, October 14, 2020

| October 14, 2020 | Reply

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

Category: Daily Discussions

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