Sunday, October 30, 2016
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 30, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
Today marks the 25th anniversary of the start of the “Perfect Storm” here
at the Observatory. A total of 5.76 inches fell over the 3-day period from
October 30th to November 1st, 1991, and the daily total on October 31st
of 3.74 inches remains the record for that date. Precipitation began as a
mix of light rain and sleet at mid-day on the 30th with rain of varying
intensity, becoming occasionally heavy the next day. The peak wind gust
for the storm reached 52 mph from the northeast the evening of the 30th.
Temperatures generally remained in the 40’s throughout the storm.
For today, warm temperatures prevailed with 50’s climbing up into the 60s
under cloudy skies with calm winds. Conditions are generally dry with the
relative humidity slowly falling into the low 50s.
7 A.M.
Weather: Broken Altostratus, Broken Dense Cirrus
Temperature: 56F; Dew Point: 49F; Wind: W at 12 kts
Sea-level pressure: 29.85 ins. Hg, rising then more quickly
Visibility: 45 miles, light distant haze
6-hr Max temp: 57F
6-hr Min temp: 56F
24-hr precip: TRACE
BHO SA 1155 E160 BKN 250 BKN 45 110/56/49/2812/985/
LGT DSNT HZ/ 8/012 53019 10057 20056
10 A.M.
Weather: Few cumulus, broken altostratus
Temperature: 59F; Dew Point: 47F; Wind: NW at 7 kts,
Sea-level pressure: 29.88 ins. Hg, falling, then more quickly
Visibility: 45 miles, light distant haze
BHO SA 1455 E160 BKN 45 117/59/47/3107/988/ FEW CU ALQDS
LGT DSNT HZ/ 8/11/ 50007
1 P.M.
Weather: Few Cumulus WNW-NNE Broken Altostratus
Temperature: 61F; Dew Point: 44F; Wind: WNW at 4 kts
Wind: Light
Sea-level pressure: 29.84 ins. Hg, falling, then more slowly
Visibility: 50 miles
6-hr Max. temp: 61F
6-hr Min. temp: 57F
BHO SA 1755 E150 BKN 50 104/61/44/3004/984/ FEW CU WNW-NNE
WND LGT LGT DSNT HZ/ 8/11/ 58013 10063 20057
SUMMARY FOR SATURDAY, OCTOBER 29, 2016
TEMPERATURE (DEGREES F)
MAX…..55 NORMAL…..56
MIN…..37 NORMAL…..39
MEAN….46 NORMAL…..47
DEPARTURE FROM 30-YEAR NORMAL……………………-1
TOTAL DEPARTURE FOR THE MONTH…………………..+73 [+2.4 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE………..0
TOTAL COOLING UNITS FOR THE MONTH……………7 DEPARTURE……….+2
TOTAL COOLING UNITS FOR THE SEASON…………901 DEPARTURE……..+299
TOTAL COOLING UNITS LAST SEASON TO DATE…….810 DIFFERENCE……..+91
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..19 DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE MONTH………….312 DEPARTURE………-73
TOTAL HEATING UNITS FOR THE SEASON…………387 DEPARTURE……..-140
TOTAL HEATING UNITS LAST SEASON TO DATE…….413 DIFFERENCE……..-45
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….24 SSW AT 9:28 P.M.*
ASOS……………………26 SSW AT 9:28 P.M.
DAVIS…………………..25 SW AT 8:26 P.M. RMY 26
FASTEST MILE FOR YESTERDAY…………………20 SSW AT 8:53 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………21 SSW AT 8:53 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..20 SSW AT 8:53 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.7 SSW
ASOS………………….12.2
DAVIS…………………10.9 SW [225 Deg.]
*last of several 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……….6.77 DEPARTURE……+2.39
ASOS…………..6.81
TOTAL PRECIPITATION FOR THE YEAR……….34.09 DEPARTURE……-9.37
ASOS………….34.45
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
10/1 57/52/55/-2/1.22/000/00 33 NNE AERO M RMY 34
10/2 55/52/54/-3/0.19/000/00 23 N AERO M RMY N/A
10/3 69/53/61/+5/0.00/404/58 21 ENE AERO M RMY 20
10/4 61/47/54/-2/T/493/71 26 NE AERO M RMY 27
10/5 61/44/53/-3/0.00/630/91 22 NE AERO M RMY 21
10/6 71/46/59/+4/0.00/682/99 16 SW* AERO M RMY 15
10/7 75/54/65/+10/0.00/679/99 16 S AERO M RMY 16
10/8 69/53/61/+7/0.00/130/19 23 SSW AERO M RMY 23
10/9 63/44/54/0/1.89/000/00 28 N AERO M RMY 34
10/10 57/40/49/-5/0.00/658/97 32 NW AERO M RMY 32
10/11 62/39/51/-2/0.00/655/97 17 N AERO M RMY N/A
10/12 68/49/59/+6/0.00/645/96 17 S AERO M RMY 17
10/13 71/52/62/+9/T/348/52 24 SSW AERO M RMY 28
10/14 58/41/50/-2/0.00/667/100 26 NNW AERO M RMY 25
10/15 58/38/48/-4/0.00/578/87 23 S AERO M RMY 26
10/16 68/46/57/+6/0.00/562/85 28 SSW AERO M RMY 30
10/17 76/58/67/+16/0.00/494/75 23 WSW AERO M RMY N/A
10/18 74/56/65/+14/0.54/210/32 35 SSW AERO M RMY 37
10/19 79/58/69/+19/0.00/549/84 29 SSW AERO M RMY N/A
10/20 64/54/59/+9/0.05/429/66 23 ENE AERO M RMY 22
10/21 75/57/66/+16/1.60/142/22 30 ESE AERO M RMY 31
10/22 65/40/53/+4/0.23/…/.. 37 WSW AERO M RMY N/A
10/23 56/41/49/0/0.00/…/.. 47 W AERO M RMY 50
10/24 59/41/50/+1/T/…/.. 38 W AERO M RMY 40
10/25 48/33/41/-8/0.00/…/.. 33 WNW AERO M RMY 35
10/26 47/32/40/-8/0.00/…/.. 29 WNW AERO M RMY 31
10/27 46/28/37/-11/…./…/.. 28 ESE AERO 28 ESE RMY N/A
10/28 51/41/46/-2/…./…/.. 40 WNW AERO 41 WNW RMY 43
10/29 55/37/46/-1/T/…/.. 24 SSW AERO 24 SSW RMY 26
10/30 Low temp since midnight is 50F; normal low is now 39F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR OCTOBER 30
HIGH 75F IN 1946,1989
LOW 21F IN 1928
PRECIP 1.85 INCHES IN 1917
SNOWFALL 2.0 INCHES IN 2011
PEAK GUST 66 NW IN 1963
RECORDS FOR OCTOBER 31
HIGH 79F IN 1946
LOW 22F IN 1904
PRECIP 3.74 INCHES IN 1991
SNOWFALL TRACE IN 1906
PEAK GUST 70e S IN 1945
TODAY’S REPORT PREPARED BY: Robert Millette
