BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, DECEMBER 27, 2014    
ALL TIMES ARE IN EASTERN STANDARD TIME
 
SUNNY, DRY, AND VERY MILD AGAIN TODAY
 
Our very mild December is continuing today, with the temperature rising
into to 50F for a high so far this afternoon.  December is now running
nearly 3.5 degrees above average so far.  Today is another mostly sunny day
in a month that has been dominated by cloud cover.  With data updated
through December 24, the percentage of possible sunshine for the month
stands at a remarkably low 25%.  Another interesting aspect of this month's
weather has been low winds, with an uncorrected monthly mean wind speed so
far of 12.0 mph.  The record for the least windy December occurred last
year, when the uncorrected speed for the month was 11.9 mph.  Today, winds
have generally been light out of the WSW, blowing at 5-10 mph for most of
the day, though they were a little stronger early this morning.
 
Today's Observations:
 
7 A.M.
Weather: Scattered altocumulus
Temperature: 35F; Dew Point: 28F; Wind: WSW at 11 kts
Sea-level pressure: 30.18 ins. Hg, rising then rising more rapidly                     
Visibility: 45 miles, distant haze
6-hr max temp: 37F
6-hr min temp: 35F
24-hr precip.: 0.14 ins.
BHO SA 1155 110 SCT 45 220/35/28/2611/018/ DSNT HZ/ 8/050 53012 10037 20035
 
10 A.M.
Weather: Scattered cirrus, few altocumulus distant NW, thin smoke layer
above horizon WSW-NW and N-NE
Temperature: 42F; Dew Point: 30F; Wind: WSW at 6 kts
Sea-level pressure: 30.23 ins. Hg, rising then steady
Visibility: 45 miles, distant haze
BHO SA 1455 240 SCT 45 237/42/30/2406/023/ FEW AC DSNT NW
THN K LYR ABV HRZN WSW-NW AND N-NE DSNT HZ/ 8/051 51017
 
1 P.M.
Weather: Scattered cirrus, few altocumulus distant WNW-NE
Temperature: 49F; Dew Point: 32F; Wind: WSW at 8 kts,
Wind: Direction variable SSW-W
Sea-level pressure: 30.16 ins. Hg, falling then falling more slowly
Visibility: 45 miles, distant haze
6-hr max temp: 50F
6-hr min temp: 35F
BHO SA 1755 240 SCT 45 213/49/32/2408/016/ FEW AC DSNT WNW-NE
DSNT HZ WND 21V27/ 8/051 56024 10050 20035
 
SUMMARY FOR FRIDAY, DECEMBER 26, 2014
 
TEMPERATURE (DEGREES F)
MAX.....47   NORMAL.....36
MIN.....35   NORMAL.....20
MEAN....41   NORMAL.....28
 
DEPARTURE FROM 30-YEAR NORMAL........................+13
TOTAL DEPARTURE FOR THE MONTH........................+93 [+3.4 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............24  DEPARTURE.........-13
TOTAL HEATING UNITS FOR THE MONTH.............745  DEPARTURE.........-110    
TOTAL HEATING UNITS FOR THE SEASON...........1904  DEPARTURE.........-213
TOTAL HEATING UNITS LAST SEASON TO DATE......2099  DIFFERENCE........-195
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................24  WSW  AT  10:56 A.M. *     
                   ASOS.......................29  W    AT  12:17 A.M.     
                   DAVIS......................27  W    AT  12:36 A.M. RMY 28
FASTEST MILE FOR YESTERDAY....................20  W    AT  12:35 A.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE.................20  W    AT  10:57 A.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE................19  WSW  AT  10:56 A.M.      
AVERAGE WIND SPEED AND DIRECTION.............12.5 WSW
                   ASOS......................12.7  
                   DAVIS.....................11.0 W [261 degrees] 
* last of several occurrences...               
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.....-0.16
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........7.19  DEPARTURE.....+3.01      
                         ASOS..............7.41 
TOTAL PRECIPITATION FOR THE YEAR..........54.95  DEPARTURE.....+2.24
                         ASOS.............55.60  
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.5
TOTAL SNOWFALL FOR THE MONTH................2.3  DEPARTURE......-8.4
TOTAL SNOWFALL FOR THE SEASON..............11.0  DEPARTURE......-2.3 
 
PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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
 
12/1  63/37/50/+13/0.01/0.0/391/70             28 WNW RMY 31
12/2  37/30/34/-2/0.10/T/000/00                26 E   RMY 29
12/3  49/34/42/+6/0.31/0.0/000/00              40 W   RMY 43
12/4  41/27/34/-1/0.00/0.0/505/91              29 WNW RMY N/A
12/5  42/23/33/-2/0.12/0.0/382/69              21 E   RMY 22
12/6  43/36/40/+5/0.99/0.0/000/00              25 NNW RMY N/A
12/7  36/18/27/-7/0.15/0.0/193/35              31 N   RMY 34
12/8  25/16/21/-13/0.01/0.1/000/00             24 N   RMY N/A
12/9  48/25/37/+3/3.23/0.0/000/00              48 ENE RMY 52
12/10 47/35/41/+8/0.43/0.0/000/00              35 NNE RMY 37
12/11 35/29/32/-1/0.05/0.5/000/00              27 SW  RMY 27 
12/12 36/26/31/-2/0.00/0.0/230/42              23 WNW RMY 25
12/13 40/27/34/+2/0.00/0.0/191/35              28 NW  RMY 28
12/14 43/28/36/+4/0.00/0.0/377/69              20 NW  RMY 20
12/15 41/28/35/+3/0.00/0.0/536/98              17 NW  RMY 17
12/16 42/33/38/+7/T/T/011/02                   17 E   RMY N/A
12/17 45/37/41/+10/0.43/0.0/000/00             27 W   RMY N/A
12/18 41/32/37/+6/0.02/T/213/39                35 WNW RMY 38  
12/19 34/25/30/0/0.00/0.0/000/00               26 NW  RMY 29
12/20 32/24/28/-2/..../.../164/30              21 NNE RMY 23
12/21 31/29/30/+0/..../.../000/00              20 NNE RMY 22
12/22 42/29/36/+7/..../0.0/.../..              23 E   RMY N/A
12/23 44/39/42/+13/..../0.0/000/00             28 ENE RMY 30
12/24 61/40/51/+22/..../0.0/000/00             32 SSW RMY 41
12/25 61/41/51/+23/..../0.0/.../..             37 W   RMY 43
12/26 47/35/41/+13/0.00/0.0/.../..             24 WSW RMY 28
 
12/27 morning low temp: 35F since midnight; normal low is now 20F
 
DAILY RECORDS FOR DECEMBER 2014:
     
-DAILY PRECIPITATION RECORD FOR DECEMBER 9 2014
      Old record of 1.51 inches set in 1952,
      replaced with new record of 3.23 inches.
 
-DAILY TEMPERATURE RECORD FOR DECEMBER 24 2014
        Old record of 58F set in 1996,
        replaced with new record of 61F.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):    
 
RECORDS FOR DECEMBER 27
HIGH 57 IN 1895,1949
LOW -4 IN 1903
PRECIP 2.43 INS. IN 1969
SNOWFALL 11.2 INS. IN 1947
PEAK GUST 73 S IN 2011
 
RECORDS FOR DECEMBER 28
HIGH 60 IN 1982
LOW -2 IN 1933
PRECIP 2.16 INS. IN 1967
SNOWFALL 9.5 INS. IN 1967
PEAK GUST 89 MPH SSE IN 1983
 
TODAY'S REPORT PREPARED BY: Jonathan O'Brien