BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MARCH 7, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
 
EARLY MORNING SPECIAL REPORT 
TEMPERATURE FINALLY DROPS BELOW 32 DEGREES BY 3 A.M.
 
Overnight wind gusts on the ASOS system reached
54 MPH NE @ 9:43 P.M.; and 49 MPH ENE @ 12:26 A.M.
The fast 2-min. av. was 35 MPH ENE yesterday
afternoon at 12:50 P.M. 
 
As of 1 P.M. early this afternoon the snow total has
doubled the 7 A.M. reading and the storm total has
reached 5.4 inches here on the summit, maybe half of
that at the base of the hill.  Light snow is continuing.
 
As of 1 P.M. the total melted for the six hours ending
at that time is 0.38 inch for 2.7 inches of snow.
The melted total for the entire event including a small
amount of rain, snow, and ice pellets yesterday is now
over 0.9 inch.
 
Today's observations:
 
7 A.M.
Weather: Obscurement with heavy snow, blowing snow and fog
Temperature: 30F; Dew Point: 30F; Wind: N at 18G28 kts,
Wind: Peak wind from E @ 30 kts at 6:40 A.M.
Sea-level pressure: 29.99 ins. Hg, rising slightly
Visibility: 1/4 miles, variable 1/8 to 1/2 mile
in heavy snow blowing snow and thin fog
6-hr min temp: 30F
24-hr. precip. 0.48 in.  
24-hr snowfall: 2.7 ins. 
Snow depth: 3 ins.  
BHO SA 1155 W2 X 1/4VS+BSF 155/30/30/0116G30/999/ VSBY 1/8V1/2 
PK WND 0231/26/ WND 34V04 SNOINCR ONE TOTAL NEW SNW PST 24 HRS
2.7 INS DRFTNG SNW/ 8//// 4/003 53005 AS0S 60035 ASOS 70048
MANUAL 6XXX/ MANUAL 70048 10034 20030
 
10 A.M. 
Weather: Partial obscurement with 2/10 with snow, broken stratus
fractus, overcast nimbostratus, light snow blowing snow, drifting
snow and thin fog 
Temperature: 31F; Dew Point: 31F; Wind: NNE at 17G32 kts,
Wind: Peak wind NNE at 37 kts and 9:43 A.M. 
Wind: Direction variable NNW to NE
Sea-level pressure: 29.98 ins. Hg, falling slightly 
Visibility: 3/4 mile, light snow and blowing snow, drifting snow,
and thin fog 
3-hour precip: 0.23 in.
3-hour snowfall: 1.7 ins. 
BHO SA 1455 -XE4 BKN 9 OVC 3/4S-BSF 153/31/31/0217G32/998/SF2
DRFTG SNW PK WND 0237/43/ WND 34V05 TOTAL NEW SNW 3 HRS 1.7 INS/
8/72/ 58002 MANUAL 6023/ ASOS 60025
 
1 P.M.
Weather: Partial obscurement with 2/10 snow, broken stratus fractus,
overcast nimbostratus, light snow, blowing snow, drifting snow
and thin fog   
Temperature: 31F; Dew Point: 31F; Wind: NNE at 17G32 kts,
Wind: Peak wind from NNE at 34 kts at 12:23 P.M.
Wind: Direction variable NNW-NE
Sea-level pressure: 29.98 ins. Hg, about steady
Visibility: 7/8 mile, variable 3/4 to 1 mile, light snow,
blowing snow and fog
6-hour max. temp: 31F
6-hour precip: 0.38 in.
6-hour snowfall: 2.7 ins.   
BHO SA 1755 –XE4 BKN 9 OVC 7/8S-BSF 154/31/31/0217G32/998/SF1
DRFTG SNW PK WND 0334/23/ WND 34V05 TOTAL NEW SNW 6 HRS 2.7 INS/
8/72/ 50001 ASOS 60043 MANUAL 6038/ 10031 20030
 
WEATHER SUMMARY FOR WEDNESDAY, MARCH 6
 
TEMPERATURE (DEGREES F)
MAX.....37     NORMAL.....41
MIN.....33     NORMAL.....23                         
MEAN....35     NORMAL.....32  
 
DEPARTURE FROM 30-YEAR NORMAL.......................+3
TOTAL DEPARTURE FOR THE MONTH......................+23 [+3.6 DEGREES/DAY]
 
HEATING DEGREE DAYS 
TOTAL HEATING UNITS FOR YESTERDAY............30   DEPARTURE............-3
TOTAL HEATING UNITS FOR THE MONTH...........177   DEPARTURE...........-23
TOTAL HEATING UNITS FOR THE SEASON.........4297   DEPARTURE..........-470
TOTAL HEATING UNITS LAST SEASON TO DATE....3859   DIFFERENCE.........+438
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...............47 NE   AT  9:43 P.M.    
                   AERO....................46 NE   AT  9:43 P.M. 
                   ASOS....................54 NE   AT  9:43 P.M.   
                   DAVIS...................49 ENE  AT  2:51 P.M. RMY 51
THE FASTEST MILE FOR YESTERDAY.............34 ENE  AT 12:50 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..............35 ENE  AT 12:50 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.............32 RNR  SY 12:50 P.M. 
AVERAGE WIND SPEED AND DIRECTION.........22.6 ENE
                   ASOS..................21.4
                   DAVIS.................19.5 ENE [060 deg]
 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M... 0.48  DEPARTURE...........+0.31
                         ASOS..............0.49
TOTAL PRECIPITATION FOR THE MONTH..........0.55  DEPARTURE...........-0.49
                         ASOS..............0.56
TOTAL PRECIPITATION FOR THE YEAR...........8.94  DEPARTURE...........-0.52
                         ASOS..............N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals
                       
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M.......  2.7   DEPARTURE............+2.2
TOTAL SNOWFALL FOR THE MONTH...............2.9   DEPARTURE............-0.2
TOTAL SNOWFALL FOR THE SEASON.............64.1   DEPARTURE...........+14.0
 
PRELIMINARY CLIMATE SUMMARY FOR MARCH 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
3/1   39/33/36/+5/0.00/0.0/.../..     25 NNW AERO 24 MPH NNW RMY 28
3/2   42/30/36/+5/0.00/0.0/.../..     18 NW  AERO 16 MPH NW  RMY 21
3/3   42/30/36/+4/0.01/0.2/.../..     17 WNW AERO 15 MPH WNW RMY N/A
3/4   39/26/33/+1/T/T/.../..          32 NW  AERO 33 MPH WNW RMY 37
3/5   43/30/37/+5/0/0/.../..          27 WNW AERO 24 MPH WNW RMY N/A
3/6   37/33/35/+3/..../.../000/00     47 NE  AERO 46 MPH NE  RMY 51
 
3/7   the morning low temp: 30F; the normal low is now 24F
 
DAILY RECORDS FOR MARCH 2013
None so far.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR MARCH 7
HIGH 66 IN 1946
LOW -1 IN 1890
PRECIP 2.05 INS. IN 1967
SNOWFALL 11.1 INS. IN 1967
PEAK GUST 66 MPH NE IN 1962
 
RECORDS FOR MARCH 8
HIGH 66 IN 2012
LOW 2 IN 1986
PRECIP 2.20 INS. IN 2008
SNOWFALL 8.3 INS. IN 1941
PEAK GUST 69 MPH SSW IN 2008
 
TODAY'S REPORT PREPARED BY: Robert Skilling