Friday, January 13, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JANUARY 13, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

EVEN HIGHER RECORD TEMP. OF 59F SET YESTERDAY,
MOSTLY SUNNY SKIES AND GUSTY WINDS TODAY

Temperatures continued to rise past the 1:00PM ob. yesterday to a new
record high of 59F.  The average temperature of 51F was 26F warmer than
normal.  Today’s temps. have been cooler with a max. temp. of 44F by 1:00PM.

Blustery conditions continue on top of Great Blue Hill. Wind direction
shifted W-NW early this morning, and winds have been gusting up to 40 MPH.
Skies have been mostly sunny, and visibility has remained at 70 miles all day.

Today’s Observations:

7 A.M.
Weather: Few altocumulus NE-SSW, scattered cirrus
Temperature: 40F; Dew Point: 32F; Wind: WNW at 20G24 kts
Sea-level pressure: 30.19 ins. Hg rising, then more quickly
Visibility: 70 miles
6-hr Max temp: 54F
6-hr Min temp: 39F
24-hr precip: 0.01 in.
24-hr snowfall: 0.0 in.
BHO SA 1155 250 SCT 70 223/40/32/2914G22/019/ FEW AC NE-SSW/
8/081 53043 MANUAL 70001 ASOS 70004 10054 20039

10 A.M.
Weather: Few cumulus WSW-NE, Few altocumulus ESE-SSE, scattered cumulus
Temperature: 41F; Dew Point: 27F; Wind: WNW at 17G28 kts,
Peak Wind: 30 kts (35 MPH) WNW at 9:30AM
Sea-level pressure: 30.04 ins. Hg, falling, then more slowly
Visibility: 70 miles
BHO SA 1455 280 SCT 70 248/41/27/2917G28/026/ FEW CU WSW-NE
FEW AC ESE-SSE PK WND 3030/30/ 8/181 51025

1 P.M.
Weather: Few distant cumulus W-ENE, few cirrus ENE-WSW
Temperature: 42F; Dew Point: 20F; Wind: WNW at 20G28 kts,
Peak Wind: 34 kts (39 MPH) WNW at 12:32PM
Sea-level pressure: 30.30 ins. Hg, rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 44F
6-hr Min temp: 39F
BHO SA 1755 CLR 70 260/42/20/2920G28/030/ FEW DSNT CU W-ENE
FEW CI ENE-WSW PK WND 2934/32/ 8/101 51012 10044 20039

SUMMARY FOR THURSDAY, JANUARY 12, 2017

TEMPERATURE (DEGREES F)
MAX…..59   NORMAL…..34
MIN…..42   NORMAL…..17
MEAN….51   NORMAL…..25

DEPARTURE FROM 30-YEAR NORMAL…………………..+26
TOTAL DEPARTURE FOR THE MONTH…………………..+55 [+4.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..14   DEPARTURE………-26
TOTAL HEATING UNITS FOR THE MONTH………….414   DEPARTURE………-54
TOTAL HEATING UNITS FOR THE SEASON………..2446   DEPARTURE……..-327
TOTAL HEATING UNITS LAST SEASON TO DATE……2057   DIFFERENCE…….+389

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….37 SSW AT 4:22 A.M.
ASOS……………………40 S   AT 7:06 A.M.
DAVIS…………………..Missing             RMY 40
FASTEST MILE FOR YESTERDAY…………………31 SSW AT 4:23 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………32 SSW AT 4:24 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..Missing
AVERAGE WIND SPEED AND DIRECTION………….19.5 SSW
ASOS………………….19.5
DAVIS…………………Missing

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01  DEPARTURE……-0.13
ASOS…………..0.04
TOTAL PRECIPITATION FOR THE MONTH……….2.60  DEPARTURE……+0.90
ASOS…………..2.85
TOTAL PRECIPITATION FOR THE YEAR………..2.60  DEPARTURE……+0.90
ASOS…………..2.85

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…….+4.4
TOTAL SNOWFALL FOR THE SEASON…………..19.0  DEPARTURE…….-3.8

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/-8/0.74/9.5/…/..           32 NNW AERO 39 NNW RMY 38
1/8   20/06/13/-13/0.01/T/…/..            26 NNW AERO 29 NNW RMY N/A
1/9   17/4/11/-15/0.00/0.0/…/..           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 Low temp since midnight is 39F; normal low is now 17F

DAILY RECORDS FOR JANUARY 2017

1/12/17: NEW DAILY RECORD MAXIMUM TEMP. OF 59F
PREVIOUS RECORD OF 57F SET 1913 AND TIED IN 1975

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

RECORDS FOR JANUARY 13
HIGH 57F IN 1890,1932
LOW -10F IN 1912,1914
PRECIP 1.54 INS. IN 1979
SNOWFALL 12.6 INS. IN 1964
PEAK GUST 74 MPH NE IN 1964

RECORDS FOR JANUARY 14
HIGH 65F IN 1995
LOW -12F IN 1914
PRECIP 1.45 INS. IN 2008
SNOWFALL 10.3 INS. IN 2008
PEAK GUST 68 MPH WNW IN 1976, S IN 2005

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle