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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JANUARY 7, 2015    
ALL TIMES ARE IN EASTERN STANDARD TIME

TUESDAY MARKS COLDEST DAY OF THE YEAR, AVERAGING
13F, OVERNIGHT LOW OF 10F

Cold air hung in place for Tuesday, suppressing temperatures
in the teens for more than 24 hours. A daytime maximum of
15F was recorded before the 1:00 PM EST observation, which
fell way below the normal daily maximum of 34F. 

Snow showers, which began at the station at 11:13 AM EST and
ended by 4:50 PM EST, dropped 0.4 inches of new snow, 
mostly falling before the 1:00 PM EST observation, 
with a total liquid equivalent of 0.02 inches. 
Snow now totals 2.9 inches for the month so far,
and 13.9 inches for the season, now 7.4 inches below then norm.

Today, temperatures have risen from an overnight low of 10F,
to the lower 20s by the 1:00 PM EST observation. Winds have 
generally been increasing, and gusty over 30 MPH after an
almost calm overnight. A maximum of 22F had been recorded
so far today.


Today's Observations:

7 A.M.
Weather: Scattered cirrus, few stratocumulus distant
offshore NE-ESE, few altocumulus in all directions
Temperature: 12F; Dew Point: 9F; Wind: SW at 7 kts
Sea-level pressure: 29.86 ins. Hg, falling, then more slowly                       
Visibility: 25 miles
6-hr max temp: 12F
6-hr min temp: 10F 
24-hr precip.: 0.02 ins 
24-hr snowfall: 0.4 ins
BHO SA 1155 250 SCT 25 113/12/9/2307/986/ FEW SC DSNT OFFSHR NE-ESE 
FEW AC ALQDS NEW SNW PST 24 HRS 0.4 INS/ 8/531 56020 ASOS 70002 
MANUAL 70002 10012 20010
 
10 A.M. 
Weather: Scattered altocumulus, scattered cirrus, few stratocumulus 
distant offshore NE-ESE, altocumulus lenticularis in all directions,
few cumulus distant WSW-NW
Temperature: 17F; Dew Point: 12F; Wind: W at 7 kts,
Sea-level pressure: 29.83 ins. Hg, falling, then more quickly 
BHO SA 1455 120 SCT 200 SCT 30 100/17/12/2607/983/ 
FEW SC DSNT OFFSHR NE-ESE FEW CU DSNT WSW-NW ACSL ALQDS/ 8/541 58013

1 P.M. 
Weather: Broken stratocumulus, virga distant ESE and WSW
Temperature: 20F; Dew Point: 6F; Wind: W at 18G26 kts,
Peak Wind: 29 kts W @ 12:40 PM EST
Sea-level pressure: 29.76 ins. Hg, falling, then more slowly
Visibility: 35 miles
6-hr max temp: 22F
6-hr min temp: 11F
BHO SA 1755 E42 BKN 35 077/20/6/2718G26/976/ VIRGA DSNT ESE AND WSW 
PK WND 2829/40/ 8/500 56023 10022 20011 


SUMMARY FOR TUESDAY, JANUARY 6, 2015

TEMPERATURE (DEGREES F)
MAX.....15   NORMAL.....34
MIN.....10   NORMAL.....18
MEAN....13   NORMAL.....26

DEPARTURE FROM 30-YEAR NORMAL.........................-13
TOTAL DEPARTURE FOR THE MONTH.........................+12 [+1.8 DEGREES/DAY] 
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............52  DEPARTURE..........+13
TOTAL HEATING UNITS FOR THE MONTH.............220  DEPARTURE..........-12     
TOTAL HEATING UNITS FOR THE SEASON...........2280  DEPARTURE.........-256
TOTAL HEATING UNITS LAST SEASON TO DATE......2544  DIFFERENCE........-264

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY..................29 W    AT   2:04 A.M.*  
                   ASOS.......................30 W    AT   2:05 A.M.  
                   DAVIS......................30 WSW  AT  12:56 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY....................21 W    AT   1:00 A.M.*   
MAXIMUM 2-MINUTE ASOS AVERAGE.................23 W    AT  12:56 A.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE................21 W    AT  12:56 A.M.  
AVERAGE WIND SPEED AND DIRECTION.............6.5 W 
                   ASOS......................6.7    
                   DAVIS.....................5.7 W [264 degrees]                 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.02  DEPARTURE.....-0.12 
                         ASOS..............0.02
TOTAL PRECIPITATION FOR THE MONTH..........1.17  DEPARTURE.....+0.31 
                         ASOS..............1.19  
TOTAL PRECIPITATION FOR THE YEAR...........1.17  DEPARTURE.....+0.31
                         ASOS..............1.19  

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.4  DEPARTURE......-0.2
TOTAL SNOWFALL FOR THE MONTH................2.9  DEPARTURE......-0.5 
TOTAL SNOWFALL FOR THE SEASON..............13.9  DEPARTURE......-7.4  

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 morning low temp: 10F since midnight; normal low is now 18F


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 7
HIGH 60F IN 1930
LOW -7F IN 1896
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: Brian Fitzgerald