BLUE HILL METEOROLOGICAL OBSERVATORY 
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, FEBRUARY 14, 2011
ALL TIMES ARE IN EASTERN STANDARD TIME
 
TEMPERATURES REACH HIGHEST SINCE JANUARY 1ST
AND ARE ONLY A FEW DEGREES SHORT OF RECORD...
LINE OF CLEARING EARLY THIS AFTERNOON
 
The early morning low temperature of 36F was the
warmest morning low temperature since 37F on
January 1st. Then, despite high cloudiness our
temperature rose to 53F by early 12:20 p.m.
A line of clearing sky was approaching from the
west in the early afternoon so temperatures may
rise a bit more closer to the record high maximum
of 56 degrees.
 
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) 19 days, 27 Jan - 14 Feb, 2011 (through Feb 14th)
6) 11 days, 15 - 25 Mar 1916
   11 days, 5 - 15 Jan 1961
 
Today's observations:
 
7 A.M.  
Weather: Overcast altostratus, altocumulus, bright sky along horizon distant
to the ENE-ESE and higher dense cirrus visible along horizon SE-SSW with
small breaks in overcast  
Temperature: 38F, Dew point: 27F; Wind: SW at 11 kts
Sea-level pressure: 29.53 inches Hg, falling
Visibility: 40 miles   
6-hour min. temp: 36F
Total snow depth on ground: 22 inches
BHO SA 1155 E110 OVC 40 001/38/27/1617/953/ BRGHT SKY BND ALG HRZN DSNT 
ENE-ESE HIER CLDS/DNS CI VSB AND BINOVC ALG HRZN DSNT SE-SSW LGT HZ/
8/072 4/022 58031 10039 20036 
 
10 A.M.  
Weather: Overcast dense cirrus, few altocumulus and altocumulus lenticularis,
numerous thin spots and small breaks in overcast, higher cirrus E-S
Temperature: 46F, Dew point: 29F; Wind: S at 18G28 kts,
Wind: Peak wind gust from south at 31 kts at 9:22 a.m.
Sea-level pressure: 29.45 inches Hg, falling
Visibility: 45 miles, distant haze
BHO SA 1455 E200 OVC 45 973/46/29/1918G28/945/ FEW SML AC/ACSL NMRS THN 
SPTS AND SML BINOVC PK WND 1931/22/ 8/042 56028 
 
1 P.M.  
Weather: Scattered altocumulus/altostratus, overcast dense cirrus,
few altocumulus castellanus NE, few altocumulus lenticularis E-S
virga overhead-W-NE-E, dense cirrus all quadrants, sun disc visible,
break in overcast to the distant E-S, line of clearing extending
from SSW to NNW advancing
Temperature: 50F, Dew point: 28F; Wind: SSW at 18G27 kts,
Wind: Peak wind gust from south at 30 kts at 12:33 p.m. 
Sea-level pressure: 29.35 inches Hg, falling
Visibility: 60 miles, NW 70 miles, distant light haze
6-hour max. temp.: 53F
BHO SA 1755 160 SCT E200 OVC 60 940/50/28/2118G27/935/ FEW ACC NE FEW 
AC/ACSL E-S DNS CI ALQDS VIRGA OVHD-W-N-E SUN DISC VSB BINOVC ESE-S CLR 
SKY BND XTDNG SW-NNW ADVCNG VSBY NW 70 DSNT LGT HZ PK WND 2030/33/ 
WND 16V25/ 8/082 58033 10053 20038

WEATHER SUMMARY FOR SUNDAY, FEBRUARY 13
 
TEMPERATURE (DEGREES F)
MAX.....36     NORMAL.....36
MIN.....19     NORMAL.....20
MEAN....28     NORMAL.....28
 
DEPARTURE FROM 30-YEAR NORMAL.................. 0
TOTAL DEPARTURE FOR THE MONTH.................-14 [-1.3 DEGREES/DAY]
 
HEATING DEGREE DAYS    
TOTAL HEATING UNITS FOR YESTERDAY............37    DEPARTURE.........0
TOTAL HEATING UNITS FOR THE MONTH...........510    DEPARTURE.......+11
TOTAL HEATING UNITS FOR THE SEASON.........4011    DEPARTURE.......-24
TOTAL HEATING UNITS LAST SEASON TO DATE....3937    DIFFERENCE......+74
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............37 S  AT 2:57 P.M.
                   AEROVANE............. .42 S  AT 2:58 P.M.
                   ASOS...................38 S  AT 2:57 P.M.
                   DAVIS..................38 S  AT 2:57 P.M.
THE FASTEST MILE FOR YESTERDAY............27 S  AT 1:57 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE.............26 S  AT 1:57 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE............27 S  AT 1:57 P.M.  
AVERRAGE WIND SPEED AND DIRECTION.......17.6 S  
                   ASOS.................17.0               
                   DAVIS................16.4 SSW [210 DEG]
 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.......-0.14
                         ASOS..............0.00   
TOTAL PRECIPITATION FOR THE MONTH..........2.49  DEPARTURE.......+0.60
                         ASOS..............2.41   
TOTAL PRECIPITATION FOR THE YEAR...........8.50  DEPARTURE.......+1.83
                        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........  0.0  DEPARTURE........-0.6
TOTAL SNOWFALL FOR THE MONTH...............12.6  DEPARTURE........+4.3
TOTAL SNOWFALL FOR THE SEASON..............83.8  DEPARTURE.......+46.1 
 
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 TSTM *
2/3  25/15/20/-6/T/T/067/11          21 WNW
2/4  32/13/23/-3/0.00/0.0/595/98     28 SW
2/5  45/22/34/+7/0.24/0.0/000/00     36 SW   AERO 42 MPH SW   TSTM
2/6  41/30/36/+9/0.00/0.0/532/87     53 W    AERO 58 MPH W
2/7  43/28/36/+9/.../049/049/08      20 SSE
2/8  36/13/25/-2/.../../000/00       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 36/19/28/0/0.00/0.0/.../..      37 S    AERO 42 MPH S
 
* TSTM day added
 
2/14 our morning low temp: 36F; the normal low temp: 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 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
 
RECORDS FOR FEBRUARY 15
HIGH 60F IN 1954
LOW -18F IN 1943
PRECIP 1.28 INCHES IN 1950
SNOWFALL 11.2 INCHES IN 1940
PEAK GUST 94e MPH WNW IN 1946
 
TODAY'S REPORT PREPARED BY: Robert Skilling/Chris Torchia