Monday, October 7, 2019

| October 7, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, OCTOBER 7, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM, HUMID, AND WINDY TODAY….

A warm humid airmass has returned to Blue Hill after the
cool and dry conditions of the past few days. Temperatures
this afternoon have risen into the mid 70s with a dew point
in the upper 50s.

The big story today has been the wind. South-southwest
wind has peaked so far at 47mph officially, although ASOS is
reporting a peak gust of 50mph.

Visibility isn’t stellar today thanks to the higher humidity
with 30 miles being the theme all day.

The high so far today is 76F, which is 13 degrees above the
normal high of 63F. The low this morning was a toasty 65F,
which is 19 degrees above the daily normal minimum of 46F.

PRELIMINARY STATS FOR SEPTEMBER 2019

TEMPERATURE, Deg. F
Avg. Max. 73.6 [+2.0]
Avg. Min. 54.5 [-0.1]
Mean      64.1 [+1.0]
24-hour corrected mean: 63.4
Max. for month: 88F on the 23rd
Min. for month: 43F on the 19th

HEATING DEGREE DAYS
Total heating units:    81 [-36]
Total for the season:   93 [-49]
Total for last season:  87

COOLING DEGREE DAYS
Total cooling units:    58  [-2]
Total for the season:  680 [+83]
Total for last season: 863

PRECIPITATION, Inches
Total: 1.27 [-2.79]
Greatest in 24 hrs: 0.37 ins. on the 2nd

WIND, mph
Avg. uncorrected wind speed: 10.3 mph
Avg. corrected wind speed:   10.9 mph
Prevailing wind direction:   SSW [11%]
Peak gust and direction:     39 W on the 2nd

SUNSHINE:
Campbell-Stokes card minutes: N/A
Astronomical total minutes:   N/A

Today’s Observations:

7 A.M.
Weather: Broken altocumulus, broken thin cirrus
Temperature: 67F; Dew Point: 57F; Wind: S at 15 kts, gusting to 26 kts
Sea-level pressure: 30.19 ins. Hg, rising then falling
Visibility: 30 miles
6-hr Max temp: 67F
6-hr Min temp: 65F
24-hr Precip: 0.00 ins.
BHO SA 1155 E70 BKN 100 BKN 250 –BKN 30 222/67/57/1915G26/019/
PK WND 1929/37/ 8/081 50000 10067 20065

10 A.M.
Weather: Broken cumulus, broken altocumulus, broken thin cirrus
Temperature: 74F; Dew Point: 59F; Wind: SSW at 17, gusting to 30 kts
Sea-level pressure: 30.16 ins. Hg, falling, then falling more rapidly
Visibility: 30 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 E35 BKN 100 BKN 250 –BKN 30 212/74/59/2017G30/016/
PK WND 2032/30/ 8/281 58010

1 P.M.
Weather: Broken cumulus, broken altocumulus, broken thin cirrus
Temperature: 74F; Dew Point: 58F; Wind: SSW at 24, gusting to 41 kts,
Peak wind: 47 MPH (41 kts) SSW at 12:45 P.M.
Sea-level pressure: 30.08 ins. Hg, falling, then falling more slowly
Visibility: 30 miles
6-hr Max temp: 74F
6-hr Min temp: 58F
6-hr Precip: 0.00 ins.
BHO SA 1755 E40 BKN 150 BKN 250 –BKN 30 187/74/58/2024G41/008/
PK WND 2041/45/ 8/281 56025 10076 20067

SUMMARY FOR SUNDAY, OCTOBER 6, 2019

TEMPERATURE (DEGREES F)
MAX…..65   NORMAL…..64
MIN…..44   NORMAL…..47
MEAN….55   NORMAL…..55

DEPARTURE FROM 30-YEAR NORMAL…………………. 0
TOTAL DEPARTURE FOR THE MONTH………………….-14 [-2.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..10   DEPARTURE……… 0
TOTAL HEATING UNITS FOR THE MONTH…………..67   DEPARTURE……..+11
TOTAL HEATING UNITS FOR THE SEASON…………160   DEPARTURE……..-38
TOTAL HEATING UNITS LAST SEASON TO DATE…….129   DEPARTURE……..+31

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE……… 0
TOTAL COOLING UNITS FOR THE MONTH……………0   DEPARTURE………-2
TOTAL COOLING UNITS FOR THE SEASON…………680   DEPARTURE……..+81
TOTAL COOLING UNITS LAST SEASON TO DATE…….863   DEPARTURE…….-183

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..36 SSW  AT 10:21 P.M.
AERO…………………….35 SSW  AT 10:21 P.M.
ASOS…………………….38 SSW  AT 10:22 P.M.
DAVIS……………………36 S    AT 10:09 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….28 SSW  AT 10:36 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….26 S    AT 10:07 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………26 SSW  AT 10:05 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….16.8 SSW
ASOS…………………….16.8
DAVIS……………………15.8 S [194 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.59  DEPARTURE……-0.30
ASOS…………..0.58
TOTAL PRECIPITATION FOR THE YEAR……….39.01  DEPARTURE……-0.97
ASOS………….38.81

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

9/01  73/56/65/-3/0.00/703/89                21 ENE AERO 14 ENE RMY 18
9/02  75/57/66/-2/0.37/165/21                39 W   AERO 41 W   RMY 41
9/03  77/61/69/+2/0.00/643/82                18 S   AERO 16 S   RMY N/A
9/04  83/61/72/+5/0.00/375/48                30 SW  AERO 28 SW  RMY 30
9/05  68/54/61/-6/0.00/513/66                23 NW  AERO 17 NW  RMY N/A
9/06  65/56/61/-6/0.03/054/07                37 ENE AERO 36 ENE RMY 36
9/07  70/51/61/-5/0.27/325/42                37 N   AERO 37 N   RMY N/A
9/08  73/53/63/-3/0.00/631/82                25 W   AERO 21 W   RMY N/A
9/09  71/54/63/-3/0.00/537/70                17 SE  AERO 16 SE  RMY 16
9/10  73/57/65/0/0.00/207/27                 25 S   AERO 25 S   RMY N/A
9/11  83/63/73/+8/0.00/419/55                31 SW  AERO 32 SW  RMY N/A
9/12  70/52/61/-4/0.11/015/02                29 ENE AERO 28 ENE RMY 28
9/13  65/49/57/-7/0.00/741/98                29 ENE AERO 27 ENE RMY 27
9/14  69/49/59/-5/0.19/030/04                36 S   AERO 37 S   RMY 37
9/15  78/62/70/+6/0.00/600/80                24 W   AERO 23 W   RMY 22
9/16  72/54/63/0/T/673/90                    25 WNW AERO 23 WNW RMY 25
9/17  67/49/58/-5/0.00/611/82                23 NW  AERO 23 N   RMY N/A
9/18  61/49/55/-7/0.00/579/78                26 NE  AERO 25 NE  RMY 25
9/19  67/43/55/-7/0.00/709/96                17 NE  AERO 18 NE  RMY N/A
9/20  78/50/64/+2/0.00/677/92                21 W   AERO 18 W   RMY 20
9/21  83/60/72/+11/0.00/711/97               21 WNW AERO 18 WNW RMY N/A
9/22  85/62/74/+13/0.00/687/94               24 SW  AERO 23 SW  RMY 25
9/23  88/65/77/+17/0.00/539/74               29 SSW AERO 28 SSW RMY 29
9/24  76/56/66/+6/0.04/616/85                26 W   AERO 26 W   RMY 27
9/25  73/50/62/+2/0.00/686/95                22 W   AERO 21 W   RMY 21
9/26  79/55/67/+8/0.25/388/54                38 SW  AERO 37 SW  RMY 39
9/27  72/50/61/+2/0.00/695/97                23 S   AERO 23 S   RMY 22
9/28  78/55/67/+9/0.00/664/93                31 S   AERO 29 S   RMY 30
9/29  75/53/64/+6/0.00/619/87                24 NW  AERO 23 NW  RMY 23
9/30  62/49/56/-2/0.00/609/86                23 NNE AERO 16 NNE 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  67/52/60/+3/0.06/…/..               28 SW  AERO 25 SSW RMY 29
10/02  74/49/62/+5/0.42/…/..               30 ENE AERO 25 ENE RMY 28
10/03  51/46/49/-7/…./…/..               28 ENE AERO 26 ENE RMY N/A
10/04  59/40/50/-6/…./…/..               38 NNW AERO 38 NNW RMY 38
10/05  58/35/47/-9/0.00/…/..               21 N   AERO 18 SSW RMY N/A
10/06  65/44/55/0/0.00/…/..                36 SSW AERO 35 SSW RMY N/A

10/07  The low since midnight is 65F, normal daily minimum is 46F

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

RECORDS FOR OCTOBER 7
HIGH 88F IN 1963 (RECORD FOR MONTH)
LOW 30F IN 1904,1986
PRECIP 1.75 INCHES IN 1972
PEAK GUST 54 W IN 2009

RECORDS FOR OCTOBER 8
HIGH 81F IN 1916,1990
LOW 28F IN 1919
PRECIP 2.31 INCHES IN 1891
SNOWFALL TRACE IN 1988, 2001 (EARLIEST DATE)
PEAK GUST 60 MPH NE IN 1996

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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