Monday, January 7, 2019

| January 7, 2019 | Reply

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JANUARY 7, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR SKIES AND COLDER TEMPERATURES….

Today the skies were mostly clear and the visibility was excellent
at 80 miles. The temperatures dropped this morning down to a low
of 14F shortly after 7:00 A.M. EST and rose to a maximum of 26F by
the 1:00 P.M. observation. These temperatures are a few degrees
below normal for this time of year. Yesterday, the temperatures
were still above normal, with a maximum of 42F and a minimum of 21F.
Dew points today were very low around 0F, and at 1:00 P.M., the
relative humidity was just 33%. The wind was also quite blustery
yesterday. A peak gust of 42 MPH out of the northwest at 4:14 P.M.
was recorded, and the average wind speed for the day was 16.4 MPH
out of the northwest. The winds have slowed since this morning. The
pressure has also been climbing over the past few days in addition
to the higher wind speeds.

Today’s Observations:

7 A.M.
Weather: Clear, few distant cumulus NE-SE, few cirrus S-NW
Temperature: 15F; Dew Point: -1F; Wind: NNW at 16G21 kts,
Peak Wind: 28 kts (32 MPH) NNW at 6:39 A.M.
Sea-level pressure: 30.34 ins. Hg, rising, then more quickly
Visibility: 80 miles
6-hr Max temp: 20F
6-hr Min temp: 15F
24-hr Precip: Trace
24-hr snowfall: Trace
Snow depth: 0 ins.
BHO SA 1155 CLR 80 276/15/M1/3316G21/034/ FEW DSNT CU NE-SE FEW CI S-NW
PK WND 3328/39/ 8/101 53021 10020 20015

10 A.M.
Weather: Clear, few cirrus in all directions
Temperature: 19F; Dew Point: -1F; Wind: NNW at 10G18 kts
Sea-level pressure: 30.42 ins. Hg, rising, then less quickly
Visibility: 80 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 CLR 80 303/19/M1/3310G18/042/ FEW CI ALQDS/ 8/001 51027

1 P.M.
Weather: Scattered cirrus
Temperature: 26F; Dew Point: 1F; Wind: NW at 8 kts
Sea-level pressure: 30.39 ins. Hg, falling, then rising
Visibility: 80 miles
6-hr Max temp: 26F
6-hr Min temp: 14F
6-hr Precip: 0.00 ins.
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 250 SCT 292/26/1/3208/039/ 8/001 55011 10026 20014

SUMMARY FOR SUNDAY, JANUARY 6, 2019

TEMPERATURE (DEGREES F)
MAX…..42   NORMAL…..34
MIN…..21   NORMAL…..18
MEAN….32   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL……………………+6
TOTAL DEPARTURE FOR THE MONTH…………………..+54 [+8.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..33   DEPARTURE………-6
TOTAL HEATING UNITS FOR THE MONTH………….178   DEPARTURE……..-54
TOTAL HEATING UNITS FOR THE SEASON………..2474   DEPARTURE……..-62
TOTAL HEATING UNITS LAST SEASON TO DATE……2445   DIFFERENCE…….+29

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..42 NW AT 4:14 P.M.
AERO…………………….46 NW AT 4:12 P.M.
ASOS…………………….46 NW AT 4:14 P.M.
DAVIS……………………47 NW AT 4:14 P.M. RMY 50
FASTEST MILE FOR YESTERDAY………………….32 NW AT 4:15 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….30 NW AT 8:29 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………32 NW AT 4:15 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..16.4 NW
ASOS…………………..15.5
DAVIS………………….16.3 NW [312 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE…….-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.01  DEPARTURE…….+1.15
ASOS…………..2.02
TOTAL PRECIPITATION FOR THE YEAR………..2.01  DEPARTURE…….+1.15
ASOS…………..2.01

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..Trace  DEPARTURE……..-0.5
TOTAL SNOWFALL FOR THE MONTH…………..Trace  DEPARTURE……..-3.4
TOTAL SNOWFALL FOR THE SEASON……………7.7  DEPARTURE…….-11.7

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 Low temp since midnight is 15F; normal low is 18F

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR JANUARY 7
HIGH 60F IN 1930
LOW -8F IN 2018
PRECIP 1.97 INS. IN 1977
SNOWFALL 16.0 INS. IN 1977
PEAK GUST 74 MPH NW IN 1968

RECORDS FOR JANUARY 8
HIGH 65F IN 2008
LOW -8F IN 1968
PRECIP 1.70 INS. IN 1958,1979
SNOWFALL 12.5 INS. IN 1996
PEAK GUST 77 MPH NNW IN 1958

TODAY’S REPORT PREPARED BY:  Lizzy Suzedell

Category: Daily Discussions

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