Friday, December 27, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, DECEMBER 27, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
MILDER TODAY, BUT CLOUDS DOMINATE…
We can add another day of non-measurable precipitation
to our records, clocking in with 9 consecutive days thus far!
Overnight precipitation left us with only a trace. This
appears to be our second longest dry stretch of the year
(January 10th-19th at 10 days is our lengthiest). It
appears we may break that heading into the weekend.
Clouds and haze have dominated throughout the day. It
has been accompanied with limited visibility, though
with winds from the south, milder and above average
temperatures have been observed.
The high so far today is 47F, which is 11 degrees
above the daily normal maximum of 36F. The low since
midnight is 31F, which is 11 degrees above the normal
minimum of 20F.
Today’s Observations:
7 A.M.
Weather: Overcast Stratus
Temperature: 33F; Dew Point: 30F; Wind: S at 14G19 kts
Sea-level pressure: 30.31 ins. Hg, falling, then falling more rapidly
Visibility: 45 miles, hazy
6-hr Max temp: 33F
6-hr Min temp: 31F
24-hr Precip: Trace
24-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1155 E035 OVC 45 265/33/30/1714G19/031/
HAZY/ 8/6// 58012 10033 20031
10 A.M.
Weather: Overcast Stratus, Few lower Stratocumulus
Temperature: 38F; Dew Point: 35F; Wind: S at 13G19 kts,
Sea-level pressure: 30.27 ins. Hg, falling, then falling more rapidly
Visibility: 40 miles, hazy
3-hr Precip: 0.00 ins.
3-hr Snowfall: 0.0 ins.
BHO SA 1455 E020 OVC 40 251/38/35/1813G19/027/
FEW LWR SC ALQDS HAZY/ 8/6// 58014
1 P.M.
Weather: Broken Stratocumulus, Overcast Altocumulus, sun dimly
visible
Temperature: 46F; Dew Point: 40F; Wind: SSW at 18G23 kts
Peak Wind: 33 MPH (29 kts) SSW at 11:11 AM
Sea-level pressure: 30.13 ins. Hg, falling, then falling more slowly
Visibility: 35 miles, hazy
6-hr Max temp: 47F
6-hr Min temp: 33F
6-hr Precip: 0.00 ins.
6-hr Snowfall: 0.0 ins.
Snow Depth: Trace
BHO SA 1755 E020 BKN E090 OVC 35 203/46/40/2018G23/013/
PK WND 2028/1611 HAZY SUN DMLY VSBL/ 8/49/ 56048 10047 20033
SUMMARY FOR THURSDAY, DECEMBER 26, 2019
TEMPERATURE (DEGREES F)
MAX…..39 NORMAL…..36
MIN…..29 NORMAL…..20
MEAN….34 NORMAL…..28
DEPARTURE FROM 30-YEAR NORMAL………………….+6
TOTAL DEPARTURE FOR THE MONTH…………………-19 [-0.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………31 DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE MONTH…………..872 DEPARTURE…….+17
TOTAL HEATING UNITS FOR THE SEASON…………2109 DEPARTURE……..-8
TOTAL HEATING UNITS LAST SEASON TO DATE…….2148 DEPARTURE…….-39
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..22 ENE AT 11:36 A.M.
AERO…………………….20 ENE AT 11:47 A.M.
ASOS…………………….24 NE AT 11:36 A.M.
DAVIS……………………23 ENE AT 11:32 A.M. RMY 22
FASTEST MILE FOR YESTERDAY………………….17 ENE AT 11:51 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 ENE AT 12:30 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………18 ENE AT 11:44 A.M.
AVERAGE WIND SPEED AND DIRECTION………….. 7.1 ENE
ASOS………………….. 7.7
DAVIS…………………. 7.9 ENE [069 deg.]
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……….6.06 DEPARTURE……+1.87
ASOS…………..6.51
TOTAL PRECIPITATION FOR THE YEAR……….55.14 DEPARTURE……+2.41
ASOS………….55.91
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE…….-0.5
TOTAL SNOWFALL FOR THE MONTH……………19.1 DEPARTURE…….+8.4
TOTAL SNOWFALL FOR THE SEASON…………..19.2 DEPARTURE…….+5.9
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
12/01 32/16/24/-13/…./5.8/011/02 33 ENE AERO 32 ENE RMY N/A
12/02 37/25/31/-5/…./2.7/000/00 52 NE AERO 47 NE RMY 53
12/03 30/23/27/-9/…./4.6/000/00 32 N AERO 35 N RMY 36
12/04 34/22/28/-7/…./0.0/000/00 23 WNW AERO 23 NNW RMY N/A
12/05 41/26/34/-1/…./0.0/343/62 33 NW AERO 35 NW RMY 37
12/06 33/23/28/-7/0.02/0.1/000/00 25 NW AERO 23 NW RMY 29
12/07 31/18/25/-9/0.00/0.0/519/94 25 NW AERO 23 NW RMY N/A
12/08 36/15/26/-8/0.00/0.0/…/.. 31 SSW AERO 32 SSW RMY N/A
12/09 57/36/47/+13/…./0.0/…/.. 53 S AERO 52 S RMY 54
12/10 58/37/48/+15/…./0.0/…/.. 35 SW AERO 39 SW RMY N/A
12/11 36/23/30/-3/…./3.0/…/.. 25 NW AERO 25 NW RMY N/A
12/12 29/17/23/-10/…./1.8/…/.. 29 W AERO 30 W RMY 25
12/13 46/22/34/+2/…./0.0/…/.. 25 SSE AERO 25 SSE RMY N/A
12/14 58/46/52/+20/…./0.0/…/.. 45 S AERO 41 S RMY N/A
12/15 48/28/38/+6/0.00/0.0/…/.. 53 W AERO 53 W RMY 50
12/16 30/25/28/-3/0.00/0.0/…/.. 36 W AERO 36 W RMY N/A
12/17 35/23/29/-2/…./1.0/…/.. 22 NNW AERO 21 NE RMY 23
12/18 33/18/26/-5/…/0.0/…/.. 44 WNW AERO 45 WNW RMY N/A
12/19 20/9/15/-15/…/0.0/…/.. 51 W AERO 47 W RMY N/A
12/20 29/11/20/-10/0.00/0.0/…./.. 32 W AERO 30 W RMY 29
12/21 31/16/24/-6/0.00/0.0/…./.. 16 SSE AERO 15 SSE RMY N/A
12/22 40/26/33/+4/0.00/0.0/…./.. 23 SW AERO 21 SW RMY 23
12/23 54/33/44/+15/0.00/0.0/…./.. 30 WSW AERO 30 SW RMY 30
12/24 42/29/36/+7/0.00/0.0/…./.. 30 NW AERO 27 NW RMY 30
12/25 42/25/34/+6/0.00/0.0/…./.. 16 NNE AERO 16 N RMY N/A
12/26 39/29/34/+6/0.00/0.0/…./.. 22 ENE AERO 20 ENE RMY 22
12/27 The low since midnight is 31F, daily normal minimum is 20F
DAILY RECORDS FOR DECEMBER
12/01/19: DAILY RECORD SNOWFALL OF 5.8 INS.,
BREAKS PREVIOUS RECORD OF 2.0 INS. SET IN 1902.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR DECEMBER 27
HIGH 57 IN 1895,1949
LOW -4 IN 1903
PRECIP 2.43 INS. IN 1969
SNOWFALL 11.2 INS. IN 1947
PEAK GUST 73 S IN 2011
RECORDS FOR DECEMBER 28
HIGH 60 IN 1982
LOW -2 IN 1933
PRECIP 2.16 INS. IN 1967
SNOWFALL 9.5 INS. IN 1967
PEAK GUST 89 MPH SSE IN 1983
TODAY’S REPORT PREPARED BY: Andrew Swanson
