Wednesday, October 23, 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 23, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

RAIN OVERNIGHT AND EARLY THIS MORNING GIVES WAY TO
A BEAUTIFUL DAY…

The rain and clouds of this morning are but a distant memory this
afternoon. Rainfall totaled 0.41 inches through the 10 A.M. observation.
Since this morning, sunshine has been increasing along with a busy
westerly wind, which has gusted just under 30 mph so far.

Visibility was only 1/4 of a mile at the early morning observation,
but quickly increased to 70 miles by the 10 A.M. observation.

The other story is the mild temperature, which has reached 65 degrees
as of the 1 P.M. observation. This is 7 degrees above the normal high
of 58 degrees. The low so far today is 54 degrees, which is 14 degrees
above the normal low of 40 degrees.

Today’s Observations:

7 A.M.
Weather: Vertical visibility 200 feet, sky obscured in light rain and fog
Temperature: 54F; Dew Point: 54F; Wind: NW at 11 kts
Sea-level pressure: 29.76 ins. Hg, falling, then rising
Visibility: 1/4 miles
6-hr Max temp: 58F
6-hr Min temp: 54F
24-hour Precip.: 0.39 in.
BHO SA 1155 W2 X 1/4R-F 079/54/54/3111/976/ 8//// 53001 60// 70039
10058 20054

10 A.M.
Weather: Broken stratocumulus
Temperature: 57F; Dew Point: 52F; Wind: WNW at 9 kts, gusting to 22 kts
Sea-level pressure: 29.73 ins. Hg, rising, then more rapidly
Visibility: 70 miles
3-hour Precip.: 0.02 in.
BHO SA 1455 E20 BKN 70 069/57/52/3009G22/973/ 8/400 53010 6002

1 P.M.
Weather: Broken cumulus, few towering cumulus distant NE-E, cirrostratus
layer distant E
Temperature: 65F; Dew Point: 45F; Wind: W at 13 kts, gusting to 20 kts
Sea-level pressure: 29.75 ins. Hg, rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 65F
6-hr Min temp: 54F
BHO SA 1755 E40 BKN 70 075/65/45/2813G20/975/ FEW TCU DSNT NE-E
CS LYR DSNT E/ 8/108 51006 6002 10065 20054

SUMMARY FOR TUESDAY, OCTOBER 22, 2019

TEMPERATURE (DEGREES F)
MAX…..58 NORMAL…..58
MIN…..47 NORMAL…..41
MEAN….53 NORMAL…..49

DEPARTURE FROM 30-YEAR NORMAL…………………+4
TOTAL DEPARTURE FOR THE MONTH………………..+10 [ +0.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………12 DEPARTURE………-4
TOTAL HEATING UNITS FOR THE MONTH…………..253 DEPARTURE……..-14
TOTAL HEATING UNITS FOR THE SEASON………….346 DEPARTURE……..-79
TOTAL HEATING UNITS LAST SEASON TO DATE……..342 DEPARTURE………+4

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………………..29 E AT 3:54 P.M.
AERO…………………….28 E AT 3:54 P.M.
ASOS…………………….30 E AT 3:52 P.M.
DAVIS……………………29 E AT 3:48 P.M. RMY 23
FASTEST MILE FOR YESTERDAY………………….22 E AT 3:59 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….21 E AT 3:59 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………22 E AT 3:58 P.M.
AVERAGE WIND SPEED AND DIRECTION……………11.6 E
ASOS……………………12.1
DAVIS…………………..12.3 E [081 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.39 DEPARTURE……+0.23
ASOS…………..0.35
TOTAL PRECIPITATION FOR THE MONTH……….5.02 DEPARTURE……+1.72
ASOS…………..5.24
TOTAL PRECIPITATION FOR THE YEAR……….43.44 DEPARTURE……+1.05
ASOS………….43.47

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