Tuesday, October 1, 2019

| October 1, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, OCTOBER 1, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST DAY THUS FAR FOLLOWING EARLY MORNING RAIN SHOWERS….

The string of fair weather days has come to an end. After some early
morning rain showers, which brought a paltry 0.06″, the day has remained
cloudy. Temperature and dew point have been slowly creeping up despite
the cloud cover along with a freshening south-southwest wind this afternoon, indicative of a warm front pushing into the region. The dew point has reached 60F as for 1 P.M., as such there is a bit of a humid feel to the air. As a result of the increased humidity and overcast conditions,  visibility has been limited to 30-40 miles today.

The high so far today is 67F degrees, which is only 1 degree above normal high of 66F. The low this morning was 52 degrees, which is 3 degrees above the normal low of 49F degrees.

Today’s Observations:

7 A.M.
Weather: Overcast stratus, light rain
Temperature: 54F; Dew Point: 53F; Wind: S at 12 kts, gusting to 17 kts
Sea-level pressure: 30.13 ins. Hg, falling, then falling more slowly
Visibility: 25 miles
6-hr Max temp: 54F
6-hr Min temp: 52F
24-hr Precip: 0.06 ins.
BHO SA 1155 E25 OVC 25R- 203/54/53/1912G17/013/ VSBY 15 ESE-S
PCPN VRY LGT/ 8/6// 56008/ 6006 70006 10054 20052

10 A.M.
Weather: Overcast stratus, few breaks in overcast overhead
Temperature: 58F; Dew Point: 54F; Wind: S at 10 kts, gusting to 17 kts
Sea-level pressure: 30.07 ins. Hg, falling, then falling more rapidly
Visibility: 30 miles
3-hr Precip: Trace
BHO SA 1455 E25 OVC 30 184/58/54/1810G17/007/ FEW BINOVC OVHD/
8/6// 58019 6000

1 P.M.
Weather: Overcast stratus, few breaks in overcast overhead through N
Temperature: 66F; Dew Point: 60F; Wind: SSW at 12 kts, gusting to 18 kts
Sea-level pressure: 30.01 ins. Hg, falling, then falling more rapidly
Visibility: 40 miles
6-hr Max temp: 67F
6-hr Min temp: 54F
6-hr Precip: Trace
BHO SA 1755 E15 OVC 40 162/66/60/2012G18/001/ FEW BINOVC OVHD-N/
8/6// 58022 6000 10067 20054

SUMMARY FOR MONDAY, SEPTEMBER 30, 2019

TEMPERATURE (DEGREES F)
MAX…..62   NORMAL…..66
MIN…..49   NORMAL…..49
MEAN….56   NORMAL…..58

DEPARTURE FROM 30-YEAR NORMAL………………….-2
TOTAL DEPARTURE FOR THE MONTH…………………+32 [+0.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………9   DEPARTURE………+1
TOTAL HEATING UNITS FOR THE MONTH…………..81   DEPARTURE……..-36
TOTAL HEATING UNITS FOR THE SEASON………….93   DEPARTURE……..-49
TOTAL HEATING UNITS LAST SEASON TO DATE……..87   DEPARTURE………+6

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE………-1
TOTAL COOLING UNITS FOR THE MONTH…………..58   DEPARTURE………-2
TOTAL COOLING UNITS FOR THE SEASON…………680   DEPARTURE……..+83
TOTAL COOLING UNITS LAST SEASON TO DATE…….863   DEPARTURE…….-183

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..23 NNE  AT 1:32 A.M.
AERO…………………….16 NNE  AT 2:22 A.M.
ASOS…………………….20 NNE  AT 1:32 A.M.
DAVIS……………………20 NE   AT 1:30 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………….14 NNE  AT 1:38 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….14 NNE  AT 2:03 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………24 NE   AT 2:02 A.M.
AVERAGE WIND SPEED AND DIRECTION…………….9.0 NNE
ASOS…………………….9.6
DAVIS……………………9.6 E [081 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.06  DEPARTURE……-0.10
ASOS…………..0.06
TOTAL PRECIPITATION FOR THE MONTH……….0.06  DEPARTURE……-0.10
ASOS…………..0.06
TOTAL PRECIPITATION FOR THE YEAR……….38.48  DEPARTURE……-0.62
ASOS………….38.29

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  72/54/63/0/0.00/673/90                 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/…/..                26 NE  AERO 25 NE  RMY 25
9/19  67/43/55/-7/0.00/…/..                17 NE  AERO 18 NE  RMY N/A
9/20  78/50/64/+2/0.00/…/..                21 W   AERO 18 W   RMY 20
9/21  83/60/72/+11/0.00/…/..               21 WNW AERO 18 WNW RMY N/A
9/22  85/62/74/+13/0.00/…/..               24 SW  AERO 23 SW  RMY 25
9/23  88/65/77/+17/0.00/…/..               29 SSW AERO 28 SSW RMY 29
9/24  76/56/66/+6/0.04/…/..                26 W   AERO 26 W   RMY 27
9/25  73/50/62/+2/0.00/…/..                22 W   AERO 21 W   RMY 21
9/26  79/55/67/+8/0.25/…/..                38 SW  AERO 37 SW  RMY 39
9/27  72/50/61/+2/0.00/…/..                23 S   AERO 23 S   RMY 22
9/28  78/55/67/+9/0.00/…/..                31 S   AERO 29 S   RMY 30
9/29  75/53/64/+6/0.00/…/..                24 NW  AERO 23 NW  RMY 23
9/30  62/49/56/-2/0.00/…/..                23 NNE AERO 16 NNE RMY N/A

10/01  The low since midnight is 52F, normal daily minimum is 49F

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

RECORDS FOR OCTOBER 1
HIGH 85F IN 1927
LOW 30F IN 1992
PRECIP 1.63 INCHES IN 2014
PEAK GUST 68e MPH SSE IN 1977

RECORDS FOR OCTOBER 2
HIGH 85F IN 1968
LOW 29F IN 1899
PRECIP 1.75 INCHES IN 1984
PEAK GUST 52e MPH S IN 1952, 52 NNW IN 1984

TODAY’S REPORT PREPARED BY: Matt Douglas

Category: Daily Discussions

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