BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, FEBRUARY 13, 2011
ALL TIMES ARE IN EASTERN STANDARD TIME
 
BHO Longest Periods with 20"+ Snow Depth (1895-2011):
1) 53 days, 27 Dec 1947 - 17 Feb 1948
2) 34 days, 5 Feb - 9 Mar 1920
   34 days, 7 Feb - 12 Mar 1978
4) 23 days, 25 Feb - 19 Mar 1969
5) 18 days, 27 Jan - 13 Feb, 2011 (through Feb 13th)
6) 11 days, 15 - 25 Mar 1916
   11 days, 5 - 15 Jan 1961
 
Today's observations:
 
7 A.M.  
Weather: Broken cirrus, broken stratocumulus, few small cumulus
and stratocumulus offshore distant NE-E
Temperature: 20F, Dew point: 10F; Wind: SW at 11 kts
Sea-level pressure: 30.06 inches Hg, rising
Visibility: 70 miles   
6-hour min. temp: 19F
Total snow depth on ground: 23 inches
BHO SA 1155 35 BKN 250 -BKN 70 178/20/10/2311/006/ FEW SML
CU & SC OFFSHR DSNT NE-E/ 8/801 4/023 51010 10022 20019
 
WEATHER SUMMARY FOR SATURDAY, FEBRUARY 12
 
TEMPERATURE (DEGREES F)
MAX.....38     NORMAL.....35
MIN.....21     NORMAL.....20
MEAN....30     NORMAL.....28
 
DEPARTURE FROM 30-YEAR NORMAL..................+2
TOTAL DEPARTURE FOR THE MONTH.................-14 [-1.4 DEGREES/DAY]
 
HEATING DEGREE DAYS    
TOTAL HEATING UNITS FOR YESTERDAY............35    DEPARTURE........-3
TOTAL HEATING UNITS FOR THE MONTH...........473    DEPARTURE.......+11
TOTAL HEATING UNITS FOR THE SEASON.........3974    DEPARTURE.......-24
TOTAL HEATING UNITS LAST SEASON TO DATE....3897    DIFFERENCE......+77
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............39 W  AT 10:50 P.M.
                   AEROVANE............. .46 W  AT 10:12 P.M.
                   ASOS...................38 W  AT 10:49 P.M.
                   DAVIS..................42 W  AT  9:12 P.M.
THE FASTEST MILE FOR YESTERDAY............29 W  AT 10:49 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE.............26 W  AT  9:36 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE............29 W  AT  9:23 P.M.  
AVERAGE WIND SPEED AND DIRECTION........17.9 S  
                   ASOS.................17.7               
                   DAVIS................16.6 SW [222 DEG]
* Last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace  DEPARTURE.......-0.14
                         ASOS..............0.00   
TOTAL PRECIPITATION FOR THE MONTH..........2.49  DEPARTURE.......+0.74
                         ASOS..............2.41   
TOTAL PRECIPITATION FOR THE YEAR...........8.50  DEPARTURE.......+1.97
                        ASOS...............9.13**
** ASOS data is in error due to system failure on 1/12-13   
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M........Trace  DEPARTURE........-0.6
TOTAL SNOWFALL FOR THE MONTH...............12.6  DEPARTURE........+4.9
TOTAL SNOWFALL FOR THE SEASON..............83.8  DEPARTURE.......+47.3
 
PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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
 
2/1  20/15/18/-8/0.80/7.5/000/00     27 N
2/2  34/18/26/0/1.17/3.1/000/00      35 NNE  AERO 37 MPH NNE
2/3  25/15/20/-6/T/T/.../..          21 WNW
2/4  32/13/23/-3/0.00/0.0/.../..     28 SW
2/5  45/22/34/+7/0.24/0.0/.../..     36 SW   AERO 42 MPH SW   TSTM
2/6  41/30/36/+9/0.00/0.0/.../..     53 W    AERO 58 MPH W
2/7  43/28/36/+9/.../../.../..       20 SSE
2/8  36/13/25/-2/.../../.../..       53 W    AERO 62 MPH W
2/9  28/9/19/-8/0.00/0.0/.../..      42 WNW  AERO 45 MPH WNW
2/10 26/13/20/-7/0.00/0.0/.../..     25 W
2/11 28/11/20/-7/0.00/0.0/.../..     23 SW
2/12 38/21/30/+2/T/T/.../..          39 W    AERO 46 MPH W
 
2/13 morning low temp. 19F; the normal low is 20F
 
DAILY RECORDS FOR FEBRUARY 2011
None so far.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR FEBRUARY 13
HIGH 64F IN 1951
LOW -10F IN 1967
PRECIP 2.80 INCHES IN 2008
SNOWFALL 13.5 INCHES IN 1894
PEAK GUST 60 MPH SE IN 1972
 
RECORDS FOR FEBRUARY 14
HIGH 56F IN 1949
LOW -8F IN 1979
PRECIP 2.09 INCHES IN 2007
SNOWFALL 11.0 INCHES IN 1914
PEAK GUST 83 MPH SSW IN 2000
  
TODAY'S REPORT PREPARED BY: Eli Melaas
 
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