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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JANUARY 14, 2015    
ALL TIMES ARE IN EASTERN STANDARD TIME

OCEAN EFFECT SNOW PERSISTS ALONG THE COAST,
BRINGS FLURRIES AND OVERCAST SKIES TO GREAT BLUE HILL TODAY

Ocean effect snow that was present offshore and along
Cape Cod yesterday has persisted and moved inland overnight,
bringing flurries to the summit of Great Blue Hill. Visibility
has remained poor for most of the day, with a minimum of 
7 miles reported during this morning's 7:00 AM EST observation
to the SW due to spotty dense snow showers.

This morning's overnight low of 11F lingered from 11:00 
PM EST last night through 5:00 AM EST this morning. By
the 1:00 PM EST observation only a trace of snow had been
recorded with 20F recorded as a daytime maximum temperature
so far.

 
Today's Observations:

7 A.M.
Weather: Snow flurries, overcast nimbostratus,
SNOW showers in all directions
Temperature: 13F; Dew Point: 3F; Wind: NNW at 8 kts
Sea-level pressure: 30.52 ins. Hg, decreasing, then more slowly                    
Visibility: 25 miles, except 7 miles SW-WSW obscured by snow
showers
6-hr max temp: 13F
6-hr min temp: 11F 
24-hr precip.: Trace 
24-hr snowfall: Trace
Snow Depth: Trace
BHO SA 1155 E17 OVC 25S- 336/13/3/3408/052/ VSBY SW-WSW 7 MI 
SNW SHWRS ALQDS PRCP VRY LGT NEW SNW PST 24 HRS TRACE/ 8/6// 
56013 MANUAL 6000/ 10013 20011

10 A.M. 
Weather: Snow flurries, overcast nimbostratus
Temperature: 16F; Dew Point: 8F; Wind: NNW at 9 kts
Sea-level pressure: 30.48 ins. Hg, falling, then rising
Visibility: 30 miles, except 20 miles WSW
3-hr precip: Trace
3-hr snowfall: Trace
BHO SA 1455 E19 OVC 30S- 321/16/8/3409/048/ 
VSBY WSW 20 MI PRCP VRY LGT NEW SNW PST 3 HRS TRACE/ 
8/6// 55015 MANUAL 6000/

1 P.M. 
Weather: Snow flurries, overcast nimbostratus,
snow showers in all directions
Temperature: 20F; Dew Point: 11F; Wind: NNW at 10 kts,
Sea-level pressure: 30.37 ins. Hg, rising, then falling
Visibility: 15 miles, except 12 miles WNW-NE
6-hr max temp: 20F
6-hr min temp: 12F
6-hr precip: Trace
6-hr snowfall: Trace
BHO SA 1755 E19 OVC 15S- 284/20/11/3310/037/ VSBY WNW-NE 12 MI 
SNW SHWRS ALQDS PRCP VRY LGT NEW SNW PST 6 HRS TRACE/ 8/6// 
58037 MANUAL 6000/ 10020 20012


SUMMARY FOR TUESDAY, JANUARY 13, 2015

TEMPERATURE (DEGREES F)
MAX.....33   NORMAL.....34
MIN.....11   NORMAL.....17
MEAN....22   NORMAL.....25

DEPARTURE FROM 30-YEAR NORMAL..........................-3
TOTAL DEPARTURE FOR THE MONTH.........................-33 [-2.7 DEGREES/DAY] 
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............43  DEPARTURE...........-3
TOTAL HEATING UNITS FOR THE MONTH.............542  DEPARTURE..........+34     
TOTAL HEATING UNITS FOR THE SEASON...........2602  DEPARTURE.........-210
TOTAL HEATING UNITS LAST SEASON TO DATE......2800  DIFFERENCE........-198

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY..................30  NNW  AT  5:06 A.M.   
                   ASOS.......................33  NNW  AT  5:05 A.M.  
                   DAVIS......................27  NNW  AT 12:17 A.M. RMY 29
FASTEST MILE FOR YESTERDAY....................23  NW   AT  5:35 A.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE.................23  NNW  AT  5:35 A.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE................19  NW   AT  5:35 A.M.   
AVERAGE WIND SPEED AND DIRECTION.............11.2 NNW
                   ASOS......................11.6    
                   DAVIS.....................9.3 NNW [343 degrees] 
* last of several occurrences....               

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...TRACE  DEPARTURE.....-0.15 
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.49  DEPARTURE.....-0.36 
                         ASOS..............1.53  
TOTAL PRECIPITATION FOR THE YEAR...........1.49  DEPARTURE.....-0.36
                         ASOS..............1.53  

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M........TRACE  DEPARTURE......-0.5
TOTAL SNOWFALL FOR THE MONTH................4.1  DEPARTURE......-3.2
TOTAL SNOWFALL FOR THE SEASON..............15.1  DEPARTURE......-8.2  

PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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

1/1  31/18/25/-2/0.00/0.0/.../..              29 SSW RMY 30 
1/2  37/26/32/+5/0.00/0.0/.../..              35 WSW RMY 38
1/3  34/21/28/+2/0.67/2.5/.../..              25 SE  RMY 26   
1/4  51/33/42/+16/0.48/0.0/000/00             30 SSW RMY N/A
1/5  46/13/30/+4/0.00/0.0/.../..              48 W   RMY 54
1/6  15/10/13/-13/0.02/0.4/.../..             29 W   RMY N/A
1/7  22/01/12/-14/0.01/0.3/.../..             43 WNW RMY 47  
1/8  16/-5/6/-20/0.00/0.0/.../..              39 WNW RMY N/A 
1/9  27/16/22/-4/0.08/0.9/.../..              35 WSW RMY 38  
1/10 22/11/17/-8/0.00/0.0/.../..              26 WNW RMY 27
1/11 31/9/20/-5/45/0.00/0.0/.../..            26 SSW RMY N/A 
1/12 36/31/34/+9/0.23/T/000/00                29 NNW RMY N/A
1/13 33/11/22/-3/0.00/0.0/.../..              30 NNW RMY 29

1/14 morning low temp: 11F since midnight; normal low is now 17F


DAILY RECORDS FOR JANUARY 2015
None so far.

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

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

RECORDS FOR JANUARY 15
HIGH 64F IN 1995
LOW -16F IN 1957 [RECORD FOR MONTH]
PRECIP 2.63 INS. IN 1958
SNOWFALL 8.8 INS. IN 1983
PEAK GUST 69e MPH SE IN 1940

TODAY'S REPORT PREPARED BY: Brian Fitzgerald