Friday, October 25, 2019

| October 25, 2019 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, OCTOBER 25, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

A CLOUDY YET MILD DAY ATOP GREAT BLUE HILL….

We observed a somewhat steady and low visibility throughout the day
of 40 miles. Dew points have been slowly rising with an approaching
low pressure center. Skies have been mostly cloudy with filtered
sun at times and winds generally light and at times variable.

The high so far today is 62F, 5 degrees above the daily normal
maximum of 57F. The low since midnight is 47F, 7 degrees above
the normal low of 40F.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus & altostratus; Broken cirrostratus
Temperature: 51F; Dew Point: 40F; Wind: WNW at 8 kts
Sea-level pressure: 30.32 ins. Hg, rising then rising more slowly
Visibility: 45 miles
6-hr Max temp: 51F
6-hr Min temp: 47F
BHO SA 1155 E150 BKN 200 BKN 45 266/51/40/3008/032/ 8/098 5107 10051
20047

10 A.M.
Weather: Broken altocumulus & altostratus; Broken cirrostratus
Temperature: 60F; Dew Point: 43F; Wind: ENE at 3 kts
Winds Light
Sea-level pressure: 30.30 ins. Hg, rising then falling
Visibility: 50 miles
BHO SA 1455 E170 BKN 250 BKN 50 262/60/43/0703/030/ WND L/V/ 8/098
58004

1 P.M.
Weather: Broken altocumulus & altostratus
Temperature: 62F; Dew Point: 42F; Wind: NE at 6 kts
Sea-level pressure: 30.24 ins. Hg, falling, then more rapidly
Visibility: 50 miles
6-hr Max temp: 62F
6-hr Min temp: 51F
BHO SA 1755 E170 BKN 50 242/62/42/0406/024/ 8/09// 58020 10062 20051

SUMMARY FOR THURSDAY OCTOBER 24, 2019

TEMPERATURE (DEGREES F)
MAX…..67   NORMAL…..58
MIN…..43   NORMAL…..40
MEAN….55   NORMAL…..49

DEPARTURE FROM 30-YEAR NORMAL…………………+6
TOTAL DEPARTURE FOR THE MONTH………………..+24 [+0.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………10 DEPARTURE………-6
TOTAL HEATING UNITS FOR THE MONTH…………..271  DEPARTURE……..-28
TOTAL HEATING UNITS FOR THE SEASON………….364  DEPARTURE……..-77
TOTAL HEATING UNITS LAST SEASON TO DATE……..385  DEPARTURE……..-21

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………….0  DEPARTURE……….0
TOTAL COOLING UNITS FOR THE MONTH…………….2  DEPARTURE………-3
TOTAL COOLING UNITS FOR THE SEASON………….682  DEPARTURE……..+80
TOTAL COOLING UNITS LAST SEASON TO DATE……..874  DEPARTURE…….-192

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..28 SSW  AT  8:36 P.M.
AERO…………………….29 SSW  AT  7:36 P.M.
ASOS…………………….28 SSW  AT  3:18 P.M.
DAVIS……………………28 SSW  AT  6:41 P.M. RMY 29
FASTEST MILE FOR YESTERDAY………………….21 S    AT  6:50 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 SSW  AT  7:40 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………20 S    AT  7:24 P.M.
AVERAGE WIND SPEED AND DIRECTION……………13.5 SW
ASOS……………………13.7
DAVIS…………………..13.2 SW [232 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……….5.04  DEPARTURE……+1.44
ASOS…………..5.30
TOTAL PRECIPITATION FOR THE YEAR……….43.46  DEPARTURE……+0.77
ASOS………….43.53

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  77/57/67/+12/0.12/…/..              47 SSW AERO 46 SSW RMY 49
10/08  60/52/56/+2/T/…/..                  22 NE  AERO 18 NW  RMY N/A
10/09  55/49/52/-2/…./…/..               43 NE  AERO 37 NE  RMY 44
10/10  54/47/51/-3/…./…/..               41 NE  AERO 37 NE  RMY 42
10/11  52/48/50/-3/…./000/00               41 NE  AERO 39 NE  RMY 41
10/12  52/49/51/-2/…./…/..               39 NE  AERO 37 NE  RMY N/A
10/13  66/48/57/+4/…./…/..               18 WNW AERO 17 WNW RMY 18
10/14  67/51/59/+7/…./…/..               18 WSW AERO 17 WSW RMY N/A
10/15  61/43/52/0/…./…/..                18 NNW AERO 17 NNW RMY N/A
10/16  61/45/53/+2/…./…/..               58 ESE AERO 58 ESE RMY N/A
10/17  60/46/53/+2/…./…/..               61 E   AERO 63 E   RMY N/A
10/18  57/41/49/-2/…./…/..               29 WNW AERO 32 W   RMY 32
10/19  58/36/47/-3/…./…/..               18 NW  AERO 18 NW  RMY 19
10/20  60/43/52/+2/T/…/..                  14 NE  AERO 16 NE  RMY N/A
10/21  59/49/54/+4/0.01/…/..               25 E   AERO 21 NE  RMY 23
10/22  58/47/53/+4/…./…/..               29 E   AERO 28 E   RMY 23
10/23  65/48/57/+8/…./…/..               35 W   AERO 35 W   RMY 36
10/24  67/43/55/+6/…/…/..                28 SSW AERO 38 SSW RMY 29

10/25 The low since midnight is 47F, normal daily minimum is 40F

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

RECORDS FOR OCTOBER 25
HIGH 81F IN 1963
LOW 26F IN 1922,1939
PRECIP 2.45 INCHES IN 2005
SNOWFALL 1.2 INCHES IN 1960
PEAK GUST 72 MPH ESE IN 1980

RECORDS FOR OCTOBER 26
HIGH 80F IN 1963
LOW 24F IN 1933
PRECIP 1.72 INCHES IN 1894
SNOW 3.0 INCHES IN 1962
WIND 59 MPH SSE IN 1967

TODAY’S REPORT PREPARED BY: Andrew Swanson

Category: Daily Discussions

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