BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JANUARY 10, 2011
ALL TIMES ARE IN EASTERN STANDARD TIME
 
TEMPS. EDGE UP CLOSE TO 32F BY EARLY AFTERNOON
JANUARY TEMPS. STILL AVERAGE 4 DEG. ABOVE NORMAL
 
Sunshine and temperatures rising to the lower 30's
followed a morning low of 18F. January temperatures
continue to cool but only slowly--down to +4 deg.
but no really cold air has yet arrived.  Precipitation
for the month is an inch below normal.
 
Today's observations: 
 
7 A.M.  
Weather: Clear, stratocumulus layer and few cumulus  along and
off shore NE-S, altocumulus layer distant NW-NE
Temperature: 19F, Dew point: 10F; Wind: W at 16G23 kts, 
Wind: Direction variable W to NW
Sea-level pressure: 29.98 inches Hg, rising
Visibility: 50 miles, light distant haze
6-hour min. temp: 18F
Total snow depth on ground: 3 inches
BHO SA 1155 CLR 50 153/19/10/2816G23/998/ SC LYR/FEW CU ALG/
OFFSHR DSNT NE-S AC LYR DSNT NW-NE OCNL DRFTG SNW/
8/870 4/003 53015 10021 20018 
 
10 A.M.  
Weather: Scattered altocumulus clouds decreasing
Temperature: 23F, Dew point: 10F; Wind: W at 15G25 kts,
Wind: Peak wind gust 26 kts from W @ 9:38 a.m. 
Sea-level pressure: 30.03 inches Hg, rising 
Visibility: 60 miles, NW 70 miles  
BHO SA 1455 90 SCT 60 171/23/10/2815G25/003/ AC CLDS DCRSNG 
VSBY NW 70/ LGT DSNT HZ PK WND 2826/38/ 8/030 50018
 
1 P.M.   
Weather: Clear, few stratocumulus distant NNW, few altocumulus
lenticularis distant NNE, CS layer distant S-SW along horizon
Temperature: 31F, Dew point: 15F; Wind: WNW at 18G24 kts, 
Wind: Direction variable W to NW
Sea-level pressure: 30.01 inches Hg, falling 
Visibility: 70 miles
6-hour max. temp: 31F
BHO SA 1755 CLR 70 164/31/15/2918G24/001/ FEW SC DSNT NNW
FEW ACSL DSNT NNE CI LYR ALG HRZN DSNT S-SW WND 26V32/
8/548 58007 10031 20018 
 
WEATHER SUMMARY FOR SUNDAY, JANUARY 9
 
TEMPERATURE (DEGREES F)
MAX.....32     NORMAL.....34
MIN.....20     NORMAL.....18
MEAN....26     NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL................. 0
TOTAL DEPARTURE FOR THE MONTH................+40 [+4.2 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............39    DEPARTURE........-2
TOTAL HEATING UNITS FOR THE MONTH...........306    DEPARTURE.......-39
TOTAL HEATING UNITS FOR THE SEASON.........2558    DEPARTURE......-116
TOTAL HEATING UNITS LAST SEASON TO DATE....2617    DIFFERENCE......-59
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............38 W   AT  8:02 P.M.
                   AEROVANE...............42 W   AT  4:45 P.M.
                   ASOS...................37 W   AT  8:02 P.M. 
                   DAVIS..................38 W   AT  8:02 P.M. 
THE FASTEST MILE FOR YESTERDAY........... 30 W   AT  8:02 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE.............29 W   AT  8:03 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE............29 W   AT  8:03 P.M.  
AVERAGE WIND SPEED AND DIRECTION.........19.0 W
                   ASOS..................17.6              
                   DAVIS.................18.6 W [280 DEG]
   
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..........0.37  DEPARTURE........-0.99
                         ASOS..............0.37  
TOTAL PRECIPITATION FOR THE YEAR...........0.37  DEPARTURE........-0.99
                        ASOS...............0.37
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........-0.5
TOTAL SNOWFALL FOR THE MONTH................2.2  DEPARTURE........-2.3
TOTAL SNOWFALL FOR THE SEASON..............25.2  DEPARTURE........+7.1 
 
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2011 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
1/1  57/37/47/+20/0.00/0.0/.../..    25 S
1/2  47/33/40/+13/0.21/0.0/.../..    38 WNW  AERO 44 MPH WNW
1/3  33/23/28/+1/0.00/0.0/.../..     40 NW   AERO 48 MPH NW
1/4  37/21/29/+2/0.00/0.0/.../..     29 SSW  AERO 35 MPH SSW
1/5  37/22/30/+3/0.00/0.0/.../..     35 W    AERO 38 MPH W
1/6  30/17/24/-2/0.00/0.0/.../..     16 WNW
1/7  33/20/27/+1/T/T/.../..          19 NNE
1/8  30/26/28/+2/0.14/1.7/.../..     23 NNW
1/9  32/20/26/0/0.02/0.5/.../..      38 W   AERO 42 MPH W
 
1/10 our morning low temp: 18F; the normal low is now 18F
 
DAILY RECORDS FOR JANUARY 2011
None so far.                             
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JANUARY 10
HIGH 54F IN 2000
LOW -7F IN 2004
PRECIP 2.16 INS. IN 1935
SNOWFALL 6.3 INS. IN 1977
PEAK GUST 73e SE IN 1977
 
RECORDS FOR JANUARY 11
HIGH 59F IN 1975
LOW -7F IN 1968
PRECIP 1.58 INS. IN 2008
SNOW 10.2 INS. 1927
PEAK GUST 95e MPH S IN 1980
 
TODAY'S REPORT PREPARED BY: Robert Skilling/Chris Torchia