Monday, January 9, 2017

| January 9, 2017 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JANUARY 9, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

HIGH PRESSURE BRINGS DRY CONDITIONS, VERY COLD TEMPERATURES CONTINUE

Clear skies last night allowed temperatures to fall to a minimum
of 4F this morning.  Skies were mostly sunny this morning, but
temps. rebounded to just 17F by 1:00PM before skies became mostly
cloudy with broken cirrus.  Winds became light, keeping wind chill
effects low, and shifted southwest shortly after the 1:00PM ob.

Today’s Observations:

7 A.M.
Weather: Few distant cumulus NNE-S
Temperature: 5F; Dew Point: -3F; Wind: W at 11 kts
Sea-level pressure: 30.63 ins. Hg rising, then less quickly
Visibility: 40 miles
6-hr Max temp: 8F
6-hr Min temp: 4F
24-hr precip: 0.00 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 CLR 40 372/05/M3/2611/063/ FEW DSNT CU NNE-S/
8/100 4/006 51025 10008 20004

10 A.M.
Weather: Few distant cumulus NNE-E, scattered cirrus
Temperature: 12F; Dew Point: 0F; Wind: WNW at 7 kts
Sea-level pressure: 30.68 ins. Hg, rising then steady
Visibility: 70 miles
BHO SA 1455 250 SCT 70 389/12/00/3007/068/ FEW DSNT CU NNE-E/
8/101 4/006 51017

1 P.M.
Weather: Few distant cumulus NNE-E, broken cirrus
Temperature: 16F; Dew Point: -5F; Wind: W at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.65 ins. Hg, falling, then more quickly
Visibility: 70 miles
6-hr Max temp: 17F
6-hr Min temp:  4F
BHO SA 1755 E250 BKN 70 380/16/M5/2605/065/ FEW DSNT CU NNE-E WND LGT/
8/101 4/006 58009 10017 20004

SUMMARY FOR SUNDAY, JANUARY 8, 2017

TEMPERATURE (DEGREES F)
MAX…..20   NORMAL…..34
MIN……6   NORMAL…..18
MEAN….13   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL…………………..-13
TOTAL DEPARTURE FOR THE MONTH…………………..+19 [+2.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..52   DEPARTURE………+13
TOTAL HEATING UNITS FOR THE MONTH………….291   DEPARTURE………-19
TOTAL HEATING UNITS FOR THE SEASON………..2323   DEPARTURE……..-292
TOTAL HEATING UNITS LAST SEASON TO DATE……1945   DIFFERENCE…….+378

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….26 NNW AT 12:18 A.M.
ASOS……………………28 NNW AT 12:18 A.M.
DAVIS…………………..26 N   AT 12:17 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………18 NNW AT 12:19 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………20 NNW AT 12:19 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..19 N   AT 12:00 A.M.
AVERAGE WIND SPEED AND DIRECTION………….11.9 WNW
ASOS………………….11.6
DAVIS…………………10.9 NNW [330 deg.]
*last of multiple occurances

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.14
ASOS…………..0.07
TOTAL PRECIPITATION FOR THE MONTH……….2.14  DEPARTURE……+1.00
ASOS…………..2.28
TOTAL PRECIPITATION FOR THE YEAR………..2.14  DEPARTURE……+1.00
ASOS…………..2.28

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.6
TOTAL SNOWFALL FOR THE MONTH……………11.2  DEPARTURE…….+6.7
TOTAL SNOWFALL FOR THE SEASON…………..19.0  DEPARTURE…….-1.5

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

1/1   41/29/35/+8/0.09/0.0/…/..           35 W   AERO 36 W   RMY 34
1/2   38/29/34/+7/0.00/0.0/…/..           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/…/..            41 WNW AERO 46 WNW RMY 45
1/5   30/23/27/+1/0.00/0.0/…/..           37 W   AERO 39 W   RMY 38
1/6   30/20/25/-1/0.05/1.7/…/..           20 W   AERO 20 W   RMY N/A
1/7   22/14/18/-8/…./…/…/..           32 NNW AERO 39 NNW RMY 38
1/8   20/06/13/-13/…./…/…/..          26 NNW AERO 29 NNW RMY N/A

1/9 Low temp since midnight is 4F; normal low is now 17F

DAILY RECORDS FOR JANUARY 2017
None so far.

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

RECORDS FOR JANUARY 9
HIGH 62F IN 1937
LOW -9F IN 1968
PRECIP 3.00 INS. IN 1956
SNOWFALL 10.0 INS. IN 1904
PEAK GUST 101e MPH SE IN 1978 [RECORD FOR MONTH]

RECORDS FOR JANUARY 10
HIGH 58F IN 2016
LOW -7F IN 2004
PRECIP 2.16 INS. IN 1935
SNOWFALL 6.3 INS. IN 1977
PEAK GUST 73e SE IN 1977

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle

Category: Daily Discussions

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