Wednesday, October 30, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, OCTOBER 30, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

A FOGGY START WITH SOME AFTERNOON CLEARING,
THEN MORE FOG….

This morning, the observatory experienced a fog that brought
visibility down to a 1/16th mile. However, some clearing this
morning exposed partly cloudy skies, and a visibility up to
almost 40 miles at 10 A.M. Since then, fog rolled in from the
east, and we are back in the fog around 2 P.M. Wind has remained
light and southerly, with a max gust so far barely over 10 mph.
A whole 1/100th inch fell yesterday between 7 and 10 yesterday,
bringing the monthly rain total to 6.56 inches. That is 2.18
inches above the normal total of 4.38 inches.

Despite abundant cloud cover and light winds, temperatures
held above seasonal averages. The high so far today is
66F, 10 degrees above the daily normal maximum of 56F.
The low since midnight is 51F, 13 degrees above the
normal minimum of 38F.

Today’s Observations:

7 A.M.
Weather: Fog
Temperature: 53F; Dew Point: 53F; Wind: S at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.33 ins. Hg, rising, then more
rapidly
Visibility: 1/16th mile, fog
6-hr Max temp: 53F
6-hr Min temp: 51F
24-hr Precip: 0.01 ins.
BHO SA 1155 X W3 1/16F 270/53/53/1804/033/ WND L/V/ 8////
70001 53009 10053 20051

10 A.M.
Weather: Scattered stratocumulus and cirrus
Temperature: 60F; Dew Point: 57F; Wind: S at 6 kts,
Wind: Light
Sea-level pressure: 30.33 ins. Hg, steady
Visibility: 35 miles, distant fog
3-hr Precip: 0.00 ins.
BHO SA 1455 15 SCT 250 SCT 35 270/60/57/1806/033/ DSNT FG ALQDS
WND LGT/ 8/802 50000

1 P.M.
Weather: Overcast stratocumulus
Temperature: 65F; Dew Point: 57F; Wind: S at 5 kts,
Wind: Light
Sea-level pressure: 30.28 ins. Hg, falling steadily
Visibility: 30 miles, except 15 miles N-ENE due to an offshore
fog bank
6-hr Max temp: 65F
6-hr Min temp: 53F
6-hr Precip: 0.00 ins.
BHO SA 1755 E25 OVC 30 253/65/57/1805/028/ DSNT FG OFFSHR VSBY
15 N-ENE WND LGT/ 8/8// 58017 10065 20053

SUMMARY FOR TUESDAY, OCTOBER 29, 2019

TEMPERATURE (DEGREES F)
MAX…..54 NORMAL…..56
MIN…..47 NORMAL…..39
MEAN….51 NORMAL…..47

DEPARTURE FROM 30-YEAR NORMAL…………………+4
TOTAL DEPARTURE FOR THE MONTH………………..+42 [+1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………14 DEPARTURE………-4
TOTAL HEATING UNITS FOR THE MONTH…………..338 DEPARTURE……..-47
TOTAL HEATING UNITS FOR THE SEASON………….431 DEPARTURE……..-96
TOTAL HEATING UNITS LAST SEASON TO DATE……..497 DEPARTURE……..-66

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………………..15 ESE AT 9:33 A.M.
AERO…………………….15 ESE AT 9:33 A.M.
ASOS…………………….14 ESE AT 10:10 A.M.
DAVIS……………………15 ESE AT 9:31 A.M. RMY 14
FASTEST MILE FOR YESTERDAY…………………..9 ESE AT 9:33 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….10 SE AT 9:12 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………11 ESE AT 9:33 A.M.
AVERAGE WIND SPEED AND DIRECTION…………….4.8 ESE
ASOS…………………….5.3
DAVIS……………………5.3 SE [141 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01 DEPARTURE……-0.15
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….6.56 DEPARTURE……+2.18
ASOS…………..6.89
TOTAL PRECIPITATION FOR THE YEAR……….44.98 DEPARTURE……+1.51
ASOS………….45.12

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 28 SSW RMY 29
10/25 64/47/56/+7/…/…/.. 20 WSW AERO 21 SW RMY N/A
10/26 58/45/52/+4/…/…/.. 20 N AERO 18 N RMY N/A
10/27 52/45/49/+1/1.43/…/.. 37 ESE AERO 35 ESE RMY 37
10/28 53/46/50/+2/…/…/.. 24 NNW AERO 24 NNW RMY N/A
10/29 54/47/51/+4/…./…/.. 15 ESE AERO 15 ESE RMY 14