Wednesday, November 4, 2015

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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, NOVEMBER 4, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

71F ON TUESDAY FOUR DEGREES SHORT OF TYING RECORD,
QUIET, WARM STRETCH CONTINUES TODAY

Yesterday, temperatures climbed to a peak of 71F, recorded
after 2:30 PM. The record of 75F, set back in 1990 was never
quite in any danger; however forecast temperatures for the
end of the week may reach record territory once again.

Overnight another inversion set up, with cool air and valley
fog found below the summit at this morning’s 7:00 AM EST
observation. Skies were completely clear with temperatures
falling to a seasonably-warm 49F.

By the 1:00 PM EST observation skies were still completed clear
of clouds in all directions. Hazy conditions were observed with
a prevailing visibility of 50 miles and a sector visibility of
40 miles from the WNW-ENE. A maximum temperature of 65F had
been recorded.
PRELIMINARY STATS FOR OCTOBER 2015

TEMPERATURE, Deg. F
Avg. Max. 59.9 [-0.4] Avg. Min. 43.1 [+0.2] Mean 51.5 [-0.1] Corrected mean: 51.1
Max. for month: 76 on 12th
Min. for month: 26 on 19th

COOLING DEGREE DAYS
Total cooling units: 0 [-5] Total for the season: 810 [+208] Total for last season: 595

HEATING DEGREE DAYS
Total heating units: 411 [-10] Total for the season: 454 [-109] Total for last season: 422

PRECIPITATION, Inches
Total: 2.69 [-2.00] Greatest in 24 hrs: 1.58 from 28th-29th

WIND, mph
Avg. uncorrected wind speed: 12.6
Avg. corrected wind speed: 12.9
Prevailing wind direction: NNW @ 13%
Peak gust and direction: 53 SSE on the 28th, S on the 29th

SUNSHINE:
Campbell-Stokes card minutes: 11238/19824 or 57%
Astronomical total minutes: 11666/20566 or 57%

Today’s Observations:

7 A.M.
Weather: Sky clear, inversion present, thin fog below
the inversion in all directions, patchy valley fog SW
Temperature: 52F; Dew Point: 44F; Wind: NE at 7 kts,
Sea-level pressure: 30.37 ins. Hg, rising, then more quickly
Visibility: 40 miles, thin fog below inversion in all directions
6-hr Max temp: 53F
6-hr Min temp: 49F
24-hr precip: 0.00 ins.
BHO SA 1155 CLR 40 285/52/44/0507/037/ SKC INVSN PRSNT
THN FG BLO INVSN ALQDS PTCHY VLY FG SW/ 8/000 53013 10053 20049

10 A.M.
Weather: Sky clear
Temperature: 60F; Dew Point 45F; Wind: estimated NE at 3 kts
Wind Speed and Direction: Light and Variable
Sea-level pressure: 30.41 ins. Hg, rising, then more slowly
Visibility: 40 miles, thin fog and hazy
BHO SA 1455 CLR 40 298/60/45/E0403/041/
SKC THN FG ALQDS HAZY WND LGT AND VRB/ 8/000 51013

1 P.M.
Weather: Sky clear
Temperature: 64F; Dew Point 43F; Wind: estimated SSW @ 2 kts
Wind Speed and Direction: Light and Variable
Sea-level pressure: 30.36 ins. Hg, falling then more quickly
Visibility: 50 miles, except 40 miles WNW-ENE, hazy
6-hr max. temp. 65F
6-hr min. temp. 52F
BHO SA 1755 CLR 50 281/64/43/E2102/036/ SKC
VSBY WNW-ENE 30 MI HAZY WNW-ENE LGT DSNT HZ E-W
WND LGT AND VRB/ 8/000 58017 10065 20052
SUMMARY FOR TUESDAY, NOVEMBER 3, 2015

TEMPERATURE (DEGREES F)
MAX…..71 NORMAL…..54
MIN…..44 NORMAL…..37
MEAN….58 NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL…………………+12
TOTAL DEPARTURE FOR THE MONTH…………………+27 [+8.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………7 DEPARTURE………-12
TOTAL HEATING UNITS FOR THE MONTH…………..30 DEPARTURE………-27
TOTAL HEATING UNITS FOR THE SEASON…………484 DEPARTURE……..-136
TOTAL HEATING UNITS LAST SEASON TO DATE…….501 DIFFERENCE……..-17

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….25 W AT 3:06 P.M.
ASOS……………………26 W AT 3:06 P.M.
DAVIS…………………..24 W AT 2:19 P.M. RMY 25
FASTEST MILE FOR YESTERDAY…………………18 W AT 2:19 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………18 W AT 3:06 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..17 SW AT 11:07 A.M.
AVERAGE WIND SPEED AND DIRECTION……………10.3 W
ASOS……………………10.4
DAVIS……………………9.1 WNW [297 Deg.] *ADDITIONAL PEAK GUST OR FASTEST MILE OCCURRENCES

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.00 DEPARTURE…..-0.16
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH……….TRACE DEPARTURE…..-0.47
ASOS……………0.00
TOTAL PRECIPITATION FOR THE YEAR………..36.83 DEPARTURE…..-7.41
ASOS…………….N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER & NOVEMBER CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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

10/1 55/51/53/-4/0.03/000/00 39 NE RMY N/A
10/2 51/47/49/-8/0.18/000/00 40 NE RMY 43
10/3 51/45/48/-8/0.31/000/00 38 NE RMY N/A
10/4 55/49/52/-4/0.00/474/68 35 E RMY 40
10/5 59/46/53/-3/T/125/18 21 NE RMY 20
10/6 68/43/56/+1/0.00/663/96 17 NW RMY 17
10/7 69/46/58/+3/0.00/640/93 20 W RMY 20
10/8 63/49/56/+2/0.00/678/99 21 S RMY N/A
10/9 68/50/59/+5/0.27/130/19 45 S RMY 49
10/10 59/44/53/-2/0.00/673/99 33 NNW RMY N/A
10/11 67/46/57/+4/0.00/582/86 26 SW RMY 28
10/12 76/50/63/+10/0.00/647/96 22 SSW RMY 24
10/13 70/55/63/+10/0.27/208/31 23 S RMY 24
10/14 66/46/56/+4/0.00/428/64 26 W RMY 29
10/15 60/41/51/-1/0.00/659/99 20 SW RMY 27
10/16 60/44/52/+1/T/471/71 31 W RMY 34
10/17 54/35/45/-6/T/482/73 30 WNW RMY 33
10/18 45/28/37/-14/0.00/480/73 24 NNW RMY 25
10/19 47/26/37/-13/0.00/648/99 25 SSW RMY 30
10/20 65/43/54/+4/0.00/306/47 28 SW RMY 28
10/21 59/51/55/+5/0.01/039/06 18 SSE RMY 21
10/22 71/51/61/+12/T/149/23 31 W RMY 34
10/23 55/34/45/-4/0.00/541/84 31 NNW RMY 34
10/24 46/33/40/-9/0.00/000/00 15 SSE RMY N/A
10/25 59/44/52/+3/0.04/019/03 29 N RMY 31
10/26 53/38/46/-2/0.00/636/100 23 NNW RMY 20
10/27 56/35/46/-2/0.00/531/81 15 SE RMY N/A
10/28 64/44/54/+6/…./019/03 53 SSE RMY N/A
10/29 72/52/62/+15/…./257/41 53 S RMY N/A
10/30 59/38/49/+2/0.00/626/100 33 WNW RMY 35
10/31 54/32/43/-4/0.00/573/92 18 SSW RMY N/A