BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, FEBRUARY 17, 2012
ALL TIMES ARE IN EASTERN STANDARD TIME
 
LIGHT PRECIPITATION AND FOG OVERNIGHT AND THIS MORNING...WARM TREND
CONTINUES
 
A band of showers passed through the region last night and this
morning, bringing a total of 0.07 inch of rain to the summit. A brief
second period of rain occurred between 7 and 8 AM that measured 0.01 inch.
Heavy fog persisted throughout the morning, at times drifting over the summit
and lowering visibilities to 1/8 mile. Our overnight low of 35F was 16 degrees
above normal and should help push the average February temperature departure
to almost 7 degrees per day!
 
 
Today's observations:
 
7 A.M. 
Weather: Full obscurement, very light rain and fog, fog drifting over summit
Temperature: 40F, Dew point: 40F, Wind: SSW @ 12 kts
Sea-level pressure: 29.96 inches Hg, falling then rising slightly
Visibility: 1 1/2 miles, ENE-SSE 3 miles
6-hour min. temp: 35F
24-hour precip: 0.07 inch
BHO SA 1155 W3 X 11/2R-F 145/40/40/2112/996/ FG DRFTG OVR SMT VSBY
ENE-SSE 3/ 8//// 55003 600// 70007 10040 20035
 
10 A.M.
Weather: Scattered cumulus, broken stratocumulus, overcast stratocumulus,
thin spots in overcast NNW-overhead, ceiling ragged
Temperature: 42F, Dew Point: 42F; Wind: WSW at 7 KT 
Wind: Direction variable SSW-W
Sea-level pressure: 29.96 inches Hg, steady
Visibility: 35 miles
3-hour precip: 0.01 inch
BHO SA 1455 5 SCT 10 BKN 65 OVC 35 146/42/42/2507/996/ THN SPTS IOVC
NNW-OVHD CLG RGGD WND 21V28/ 8/7// 50001 6001/
 
 
WEATHER SUMMARY FOR THURSDAY, FEBRUARY 16
 
TEMPERATURE (DEGREES F)
MAX.....45    NORMAL.....37
MIN.....30    NORMAL.....19
MEAN....38    NORMAL.....28
 
DEPARTURE FROM 30-YEAR NORMAL.....................+10
TOTAL DEPARTURE FOR THE MONTH....................+107 [+6.5 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..............27   DEPARTURE.........-10
TOTAL HEATING UNITS FOR THE MONTH.............503   DEPARTURE........-107
TOTAL HEATING UNITS FOR THE SEASON...........3284   DEPARTURE........-862
TOTAL HEATING UNITS LAST SEASON TO DATE......4111   DIFFERENCE.......-827
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............24 S   AT  9:33 P.M.   
                   AERO..................27 S   AT  9:33 P.M.  
                   ASOS..................25 S   AT  9:34 P.M.  
                   DAVIS.................25 S   AT  9:33 P.M. RMY N/A
THE FASTEST MILE FOR YESTERDAY...........18 S   AT 11:40 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE............18 S   AT  9:34 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE...........18 S   AT  9:34 P.M. 
AVERAGE WIND SPEED AND DIRECTION........9.5
                   ASOS.................8.7
                   DAVIS................8.3 WSW (242 deg)
 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.07  DEPARTURE..........-0.07
                         ASOS..............0.07
TOTAL PRECIPITATION FOR THE MONTH..........0.22  DEPARTURE..........-1.99
                         ASOS..............0.21
TOTAL PRECIPITATION FOR THE YEAR...........3.41  DEPARTURE..........-3.15
                        ASOS...............3.45
     
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE..........-0.5
TOTAL SNOWFALL FOR THE MONTH................0.6  DEPARTURE..........-9.4
TOTAL SNOWFALL FOR THE SEASON..............17.1  DEPARTURE.........-22.3
 
PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2012 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
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
 
2/1  58/31/45/+19/T/0.0/174/29      39 WNW AERO 40 MPH WNW RMY 41
2/2  40/28/34/+8/T/0.0/000/00       25 WNW AERO 25 MPH WNW RMY N/A
2/3  37/22/30/+4/0.00/0.0/574/95    28 NW  AERO 28 MPH NW  RMY 29
2/4  43/24/34/+8/0.00/0.0/498/82    28 WNW AERO 31 MPH WNW RMY 30
2/5  34/18/26/0/0.00/0.0/597/98     18 W   AERO 17 MPH W   RMY N/A
2/6  49/24/37/+11/0.00/0.0/599/98   33 WSW AERO 32 MPH WSW RMY 34
2/7  43/27/35/+8/0.00/0.0/596/97    24 NNW AERO 28 MPH NNW RMY 24
2/8  37/17/27/0/0.00/0.0/388/63     22 N   AERO 21 MPH N   RMY 24
2/9  45/26/36/+9/0.00/0.0/607/98    21 NW  AERO 21 MPH W   RMY 21
2/10 49/30/40/+13/0.02/0.0/467/75   32 SSW AERO 35 MPH SSW RMY 34
2/11 36/27/32/+5/0.13/0.6/012/02    33 NW  AERO 33 MPH NW  RMY N/A
2/12 28/13/21/-6/0.00/0.0/621/99    46 WNW AERO 48 MPH WNW RMY 50
2/13 40/12/26/-2/0.00/0.0/535/85    43 W   AERO 42 MPH W   RMY 44 
2/14 43/29/36/+8/0.00/0.0/082/13    23 SSW AERO N/A        RMY 23
2/15 43/36/40/+12/T/0.0/.../..      21 SSW AERO 22 MPH SSW RMY N/A  
2/16 45/30/38/+12/0.07/0.0/.../..   24 S   AERO 27 MPH S   RMY N/A
 
2/17 our morning low temp: 35F; the normal low is now 19F
 
DAILY RECORDS FOR FEBRUARY 2012
None so far.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR FEBRUARY 17
HIGH 61F IN 1981
LOW -16F IN 1896
PRECIP 1.86 INCHES IN 2003
SNOWFALL 20.0 INCHES IN 2003
PEAK GUST 72 MPH NW IN 1968
 
RECORDS FOR FEBRUARY 18
HIGH 65F IN 1981
LOW -10F IN 1958
PRECIP 1.97 INCHES IN 1887
SNOWFALL 9.2 INCHES IN 1952
PEAK GUST 70 MPH S IN 2008
 
TODAY'S REPORT PREPARED BY: Eli Melaas