Saturday, January 12, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JANUARY 12, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
COOLER TEMPERATURES AND CLEAR SKIES….
The temperatures at Great Blue Hill have dropped below normal
and are much colder than they have been over the past several
days. Yesterday, the maximum temperature reached was 26F, which
occurred right around the 1:00 P.M. EST observation. The
temperatures fell to a minimum of only 9F this morning, which
is the coldest temperature so far for the month of January.
This is 8F below the normal low temperature of 17F for this time
of the year. The winds are continuing to be blustery out of the
WNW to NW, and yesterday’s peak gust was 36 MPH out of the WNW at
4:33 A.M. Visibility has been excellent at 80 miles for most of
the day, and skies have been mostly clear with just a few
altocumulus clouds. The dry air could be a factor to this, as
dew points have been staying close to 0F.
Today’s Observations:
7 A.M.
Weather: Clear, few distant cumulus ENE-E, few altocumulus NE-NW
Temperature: 10F; Dew Point: -1F; Wind: WNW at 8 kts
Sea-level pressure: 30.45 ins. Hg, rising, then more quickly
Visibility: 70 miles
6-hr Max temp: 11F
6-hr Min temp: 9F
24-hr Precip: 0.00
24-hr snowfall: 0.0
Snow depth: 0 ins.
BHO SA 1155 CLR 70 312/10/M1/2908/045/ FEW DSNT CU ENE-E FEW AC NE-NW/
8/130 53017 10011 20009
10 A.M.
Weather: Clear, few altocumulus ENE-W
Temperature: 18F; Dew Point: 1F; Wind: NW at 13G20 kts
Sea-level pressure: 30.48 ins. Hg, rising, then less quickly
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 80 321/18/1/3113G20/048/ FEW AC ENE-W/ 8/030 51009
1 P.M.
Weather: Clear, few altocumulus E-SW
Temperature: 26F; Dew Point: 1F; Wind: WNW at 14G22 kts
Sea-level pressure: 30.45 ins. Hg, falling, then less quickly
Visibility: 80 miles
6-hr Max temp: 26F
6-hr Min temp: 9F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 CLR 80 311/26/1/3014G22/045/ FEW AC E-SW/ 8/030 56020
10026 20009
SUMMARY FOR FRIDAY, JANUARY 11, 2019
TEMPERATURE (DEGREES F)
MAX…..26 NORMAL…..34
MIN…..12 NORMAL…..17
MEAN….19 NORMAL…..25
DEPARTURE FROM 30-YEAR NORMAL……………………-6
TOTAL DEPARTURE FOR THE MONTH…………………..+60 [+5.3 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..46 DEPARTURE………+6
TOTAL HEATING UNITS FOR THE MONTH………….369 DEPARTURE……..-59
TOTAL HEATING UNITS FOR THE SEASON………..2665 DEPARTURE……..-68
TOTAL HEATING UNITS LAST SEASON TO DATE……2641 DIFFERENCE…….+24
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..31 WNW AT 4:33 A.M.
AERO…………………….42 WNW AT 7:03 A.M.
ASOS…………………….37 WNW AT 4:34 A.M.
DAVIS……………………40 WNW AT 7:05 A.M. RMY 38
FASTEST MILE FOR YESTERDAY………………….29 WNW AT 4:31 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….26 WNW AT 4:35 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………29 WNW AT 4:34 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..17.4 NW
ASOS…………………..16.6
DAVIS………………….17.5 NW [308 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE…….-0.14
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….2.14 DEPARTURE…….+0.58
ASOS…………..2.15
TOTAL PRECIPITATION FOR THE YEAR………..2.14 DEPARTURE…….+0.58
ASOS…………..2.15
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……..-0.6
TOTAL SNOWFALL FOR THE MONTH…………..Trace DEPARTURE……..-6.2
TOTAL SNOWFALL FOR THE SEASON……………7.7 DEPARTURE…….-14.5
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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
01/01 54/29/42/+15/…./0.0/…/.. 53 W AERO 53 W RMY 54
01/02 34/24/29/+2/…./…/…/.. 22 NW AERO 22 NW RMY N/A
01/03 42/28/35/+9/0.01/T/…/.. 28 WNW AERO 30 WNW RMY 30
01/04 43/30/37/+11/…./…/…/.. 29 SW AERO 29 SW RMY 29
01/05 41/32/37/+11/1.19/…/…/.. 26 NE AERO 25 NNW RMY 27
01/06 42/21/32/+6/0.00/0.0/…/.. 42 NW AERO 46 NW RMY 50
01/07 26/14/20/-6/…/…/…/.. 37 NW AERO 41 NW RMY N/A
01/08 40/24/32/+6/…/…/…/.. 24 SSE AERO 23 SSE RMY N/A
01/09 42/31/37/+11/…/…/…/.. 44 W AERO 46 WNW RMY 45
01/10 32/20/26/+1/T/T/…/.. 37 NW AERO 41 NW RMY 43
01/11 26/12/19/-6/0.00/0.0/…/.. 36 WNW AERO 37 WNW RMY 38
01/12 Low temp since midnight is 9F; normal low is 17F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JANUARY 12
HIGH 60F IN 2018
LOW -15F IN 1886
PRECIP 2.04 INS. IN 2011
SNOW 18.2 INS. IN 2011
WIND 84e MPH S IN 1980
RECORDS FOR JANUARY 13
HIGH 60F IN 2018
LOW -10F IN 1912,1914
PRECIP 1.54 INS. IN 1979
SNOWFALL 12.6 INS. IN 1964
PEAK GUST 74 MPH NE IN 1964
TODAY’S REPORT PREPARED BY: Lizzy Suzedell
