Friday, December 30, 2016
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, DECEMBER 30, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
OVERNIGHT SNOW WITH THUNDER AND INCREASING WIND
Yesterday’s storm left us with 0.87 ins of precipitation and 1.8 ins. of snow.
By the 7:00 A.M. EST observation, the sky was clear with few clouds. The
temperature warmed from a low of 30F this morning to a high of 36 by 1:00 P.M.
Winds increased today with a peak gust of 37 before 1:00 P.M.
There was a quick burst of snow at Blue Hill around 1:45 P.M. This didn’t leave
us with anything measurable, but it did bring us a new peak gust of 46 MPH. The
snow and clouds cleared from above the observatory within minutes.
7 A.M.
Weather: Few stratocumulus NW-SW, few altocumulus SW-NE
Temperature: 30F; Dew Point: 27F; Wind: WSW at 16G23 kts
Sea-level pressure: 29.41 ins. Hg, rising, then more quickly
Visibility: 40 miles
6-hr Max temp: 31F
6-hr Min temp: 30F
24-hr precip: 0.87 in.
24-hr snowfall: 1.8 in.
BHO SA 1155 CLR 40 959/30/27/2516G23/941/ FEW SC NW-SW FEW AC SW-NE NEW
SNW PST 24 HRS 1.8 INS/ 8/570 53021 MANUAL 70087 ASOS 70097 10031 20030
10 A.M.
Weather: Scattered cumulus, few altocumulus SW-NW
Temperature: 34F; Dew Point: 26F; Wind: WSW at 15G26 kts,
Peak Wind: 26 kts WSW at 9:46 A.M.
Sea-level pressure: 29.49 ins. Hg, rising, then more quickly
Visibility: 50 miles
BHO SA 1455 36 SCT 60 985/34/26/2416G26/949/ FEW AC SW-NW PK WND 2426/46/
8/170 52026
1 P.M.
Weather: Broken cumulus, few altostratus in all directions
Temperature: 36F; Dew Point: 26F; Wind: WSW at 19G32 kts,
Peak Wind: 32 kts WSW at 12:46 P.M.
Sea-level pressure: 29.48 ins. Hg, falling steadily
Visibility: 80 miles, except 30 miles W
6-hr Max temp: 36F
6-hr Min temp: 30F
BHO SA 1755 E39 BKN 80 984/36/26/2519G32/948/ FEW AS ALQDS PK WND 2532/46
VSBY W 30/ 8/110 55001 10036 20030
SUMMARY FOR THURSDAY, DECEMBER 29, 2016
TEMPERATURE (DEGREES F)
MAX…..40 NORMAL…..35
MIN…..28 NORMAL…..20
MEAN….34 NORMAL…..27
DEPARTURE FROM 30-YEAR NORMAL……………………+7
TOTAL DEPARTURE FOR THE MONTH…………………..+29 [+0.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..31 DEPARTURE……….-7
TOTAL HEATING UNITS FOR THE MONTH………….936 DEPARTURE………-31
TOTAL HEATING UNITS FOR THE SEASON………..1966 DEPARTURE……..-263
TOTAL HEATING UNITS LAST SEASON TO DATE……1593 DIFFERENCE…….+373
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….38 NW AT 8:26 P.M.
ASOS……………………42 NW AT 8:14 P.M.
DAVIS…………………..41 NW AT 8:24 P.M. RMY 42
FASTEST MILE FOR YESTERDAY…………………28 NW AT 8:14 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………30 NW AT 8:24 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..29 ESE AT 8:24 P.M.
AVERAGE WIND SPEED AND DIRECTION………….13.3 ESE
ASOS………………….13.6
DAVIS…………………12.0 SW [210 Deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.87 DEPARTURE……+0.73
ASOS…………..0.97
TOTAL PRECIPITATION FOR THE MONTH……….2.77 DEPARTURE……-1.84
ASOS…………..3.12
TOTAL PRECIPITATION FOR THE YEAR……….39.74 DEPARTURE…..-13.40
ASOS………….40.55
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….1.8 DEPARTURE…….+1.3
TOTAL SNOWFALL FOR THE MONTH…………….7.8 DEPARTURE…….-4.5
TOTAL SNOWFALL FOR THE SEASON……………7.8 DEPARTURE…….-7.1
PRELIMINARY CLIMATE SUMMARY FOR DECEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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
12/1 55/39/47/+10/0.20/0.0/385/69 36 W AERO 37 W RMY 36
12/2 48/34/41/+5/0.00/0.0/535/96 32 W AERO 32 W RMY N/A
13/3 44/31/38/+2/0.00/0.0/445/80 37 WNW AERO 39 WNW RMY 40
12/4 39/27/33/-2/0.00/0.0/355/64 25 NW AERO 25 NW RMY N/A
12/5 36/27/32/-3/0.13/0.4/000/00 26 W AERO 25 W RMY 29
12/6 42/30/36/+1/0.00/0.0/392/71 22 W AERO 21 W RMY N/A
12/7 39/34/37/+3/0.10/0.0/000/00 21 E AERO 21 E RMY N/A
12/8 40/29/35/+1/0.00/0.0/033/06 30 W AERO 31 W RMY 33
12/9 35/21/28/-6/0.00/0.0/549/100 35 W AERO 36 WNW RMY 34
12/10 27/17/22/-11/0.00/0.0/544/99 26 WNW AERO 27 WNW RMY 29
12/11 33/16/25/-8/0.06/0.4/411/75 17 SSW AERO 15 SW RMY N/A
12/12 41/27/34/+1/0.35/0.9/038/07 29 ESE AERO 29 SE RMY 30
12/13 41/30/36/+4/0.00/0.0/427/78 25 WSW AERO 25 W RMY 27
12/14 40/26/33/+1/0.00/0.0/530/97 30 WNW AERO 31 WNW RMY N/A
12/15 29/13/21/-11/T/T/420/77 50 W AERO 62 W RMY 56
12/16 18/01/10/-21/0.00/0.0/485/89 39 WNW AERO 51 WNW RMY N/A
12/17 36/18/27/-4/0.60/4.3/000/00 25 SSW AERO 28 SSW RMY N/A
12/18 55/30/43/+12/0.05/0.0/000/00 47 WSW AERO 53 S RMY 53
12/19 30/17/24/-6/0.00/0.0/273/50 26 WNW*AERO 28 NW RMY 26
12/20 32/13/23/-7/0.00/0.0/359/66 28 SSE AERO 29 SSW RMY N/A
12/21 40/25/33/+3/0.00/0.0/354/65 28 SSE AERO 28 SSW RMY 30
12/22 38/29/34/+5/T/T/033/06 28 SSE AERO 29 S RMY 30
12/23 44/29/37/+8/0.00/0.0/…/.. 25 WNW AERO 25 WNW RMY N/A
12/24 41/34/38/+9/0.39/0.0/…/.. 30 SSW AERO 31 SSW RMY 30
12/25 43/25/34/+6/0.00/0.0/…/.. 35 NW AERO 37 NW RMY 36
12/26 46/20/33/+5/…./0.0/…/.. 39 S AERO 40 S RMY N/A
12/27 56/35/46/+18/…./0.0/…/.. 51 SW AERO 55 SW RMY N/A
12/28 40/29/35/+7/0.00/0.0/…/.. 31 W AERO 32 W RMY 26
12/29 40/28/34/+7/…./…/…/.. 38 NW AERO 44 NW RMY 42 TSTM
12/30 Low temp since midnight is 30F; normal low is now 20F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR DECEMBER 30
HIGH 60 IN 1984
LOW -18 IN 1933
PRECIP 1.48 INS. IN 1891
SNOWFALL 7.5 INS. IN 1956
PEAK GUST 81 MPH WNW IN 1962
RECORDS FOR DECEMBER 31
HIGH 62 IN 1965
LOW -12 IN 1917
PRECIP 0.96 INS. IN 1906
SNOWFALL 7.5 INS. IN 2008
PEAK GUST 78 MPH NW IN 1990
TODAY’S REPORT PREPARED BY: Lizzy Suzedell
