Wednesday, January 18, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JANUARY 18, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

WINTER STORM CONTINUES TO BRING LIGHT DRIZZLE AND FOG

The winter storm hit Blue Hill around 4:00PM last night,
bringing mixed precip. of sleet, snow, and rain.  The
total precip. at 7:00AM this morning was 0.42 in. with
an additional 0.07 in. falling by 1:00PM.  Precip. was
liquid all day with no snow or freezing rain/drizzle
observed as temperatures remained above freezing.

Fog limited visibility to 1-2 miles and obscured any
vertical visibility to just 300 feet all day.  Winds
remained out of the E-ENE and were moderate with a peak
gust of approximately 25 MPH so far today.

Today’s Observations:

7 A.M.
Weather: Light drizzle and fog
Temperature: 35F; Dew Point: 34F; Wind: E at 13G18 kts
Sea-level pressure: 29.97 ins. Hg, rising, then falling
Visibility: 1 1/2 miles
6-hr Max temp: 35F
6-hr Min temp: 34F
24-hr precip: 0.42 in.
24-hr snowfall: Trace
BHO SA 1155 W3 X 1 1/2L-F 148/35/34/0913G18/997/ 8////
58004 MANUAL 70042 ASOS 70041 10035 20034

10 A.M.
Weather: Light drizzle and fog
Temperature: 37F; Dew Point: 37F; Wind: ENE at 10G17 kts
Sea-level pressure: 29.98 ins. Hg, rising steadily
Visibility: 1 1/2 miles, Variable 1-2 miles
3-hr precip: 0.02 in.
3-hr snowfall: 0.0 in.
BHO SA 1455 W3 X 1 1/2VL-F 152/37/37/0710G17/998/ VSBY 1V2/ 8////
51004 MANUAL 6002/ ASOS 60005

1 P.M.
Weather: Light rain and fog
Temperature: 38F; Dew Point: 37F; Wind: ENE at 13G23 kts
Sea-level pressure: 29.93 ins. Hg, falling, then less quickly
Visibility: 1 1/2 miles, Variable 1-2 miles
6-hr Max temp: 38F
6-hr Min temp: 35F
6-hr precip: 0.07 in.
6-hr snowfall: 0.00 in.
BHO SA 1755 W3 X 1 1/2VR-F 136/38/37/0613G23/993/ VSBY 1V2/ 8//// 56016
MANUAL 6007/ ASOS 60011 10038 20035

SUMMARY FOR TUESDAY, JANUARY 17, 2017

TEMPERATURE (DEGREES F)
MAX…..40   NORMAL…..33
MIN…..29   NORMAL…..17
MEAN….35   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL…………………..+10
TOTAL DEPARTURE FOR THE MONTH…………………..+86 [+5.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..30   DEPARTURE………-10
TOTAL HEATING UNITS FOR THE MONTH………….583   DEPARTURE………-85
TOTAL HEATING UNITS FOR THE SEASON………..2615   DEPARTURE……..-357
TOTAL HEATING UNITS LAST SEASON TO DATE……2236   DIFFERENCE…….+379

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….23 E   AT  9:56 P.M.
ASOS……………………23 ESE AT  3:59 A.M.
DAVIS…………………..19 W   AT 12:49 P.M.  RMY 25
FASTEST MILE FOR YESTERDAY…………………19 E   AT  9:56 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………18 E   AT  9:57 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..16 ESE AT 11:37 A.M.
AVERAGE WIND SPEED AND DIRECTION………….11.2 E
ASOS………………….11.7
DAVIS………………….9.7 ENE [64 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.42  DEPARTURE……+0.27
ASOS…………..0.41
TOTAL PRECIPITATION FOR THE MONTH……….3.02  DEPARTURE……+0.59
ASOS…………..3.27
TOTAL PRECIPITATION FOR THE YEAR………..3.02  DEPARTURE……+0.59
ASOS…………..3.27

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..Trace  DEPARTURE…….-0.6
TOTAL SNOWFALL FOR THE MONTH……………11.2  DEPARTURE…….+1.6
TOTAL SNOWFALL FOR THE SEASON…………..19.0  DEPARTURE…….-6.6

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

1/1   41/29/35/+8/0.09/0.0/533/97           35 W   AERO 36 W   RMY 34
1/2   38/29/34/+7/0.00/0.0/011/02           21 E   AERO 20 E   RMY N/A
1/3   42/37/40/+14/1.14/0.0/000/00          39 ENE AERO 41 ENE RMY 34
1/4   44/30/37/+11/0.11/T/000/00            41 WNW AERO 46 WNW RMY 45
1/5   30/23/27/+1/0.00/0.0/343/62           37 W   AERO 39 W   RMY 38
1/6   30/20/25/-1/0.05/1.7/072/13           20 W   AERO 20 W   RMY N/A
1/7   22/14/18/-8/0.74/9.5/000/00           32 NNW AERO 39 NNW RMY 38
1/8   20/06/13/-13/0.01/T/512/92            26 NNW AERO 29 NNW RMY N/A
1/9   17/4/11/-15/0.00/0.0/335/60           23 SSW AERO 23 SSW RMY 25
1/10  41/14/28/+3/0.18/0.0/…/..           35 SE  AERO 37 SE  RMY N/A
1/11  53/40/47/+22/0.13/0.0/…/..          51 SSW AERO 48 SSW RMY 57
1/12  59/42/51/+26/0.15/0.0/…/..          37 SSW AERO 40 S   RMY 40
1/13  55/23/39/+14/0.00/0.0/…/..          39 WNW AERO 43 WNW RMY 42
1/14  30/14/22/-3/0.00/0.0/…/..           20 SSW AERO 20 SSW RMY 22
1/15  35/23/29/+4/0.00/0.0/…/..           28 NW  AERO 28 NW  RMY 28
1/16  40/22/31/+6/0.00/0.0/…/..           28 SW  AERO 25 SW  RMY 27
1/17  40/29/35/+10/…./T/…/..            23 E   AERO 23 E   RMY 25

1/18 Low temp since midnight is 34F; normal low is now 17F

DAILY RECORDS FOR JANUARY 2017

1/12/17: NEW DAILY RECORD HIGH MAXIMUM TEMP. OF 59F,
PREVIOUS RECORD WAS 57F SET 1913 AND TIED IN 1975
1/12/17: NEW DAILY RECORD HIGH MINIMUM TEMP. OF 42F,
PREVIOUS RECORD WAS 40F SET 2006

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

RECORDS FOR JANUARY 18
HIGH 62F IN 1973,1990
LOW -10F IN 1982
PRECIP 1.68 INS. IN 1915
SNOWFALL 13.0 INS. IN 1948
PEAK GUST 85 MPH SSE IN 2006

RECORDS FOR JANUARY 19
HIGH 59F IN 1973
LOW -11F IN 1887
PRECIP 2.34 INS. IN 1936
SNOWFALL 10.5 INS. IN 1936
PEAK GUST 93e MPH WNW IN 1943

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle and Kaitlin Geagan