BLUE HILL METEOROLOGICAL OBSERVATORYMILTON, MASSACHUSETTS 02186ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARYWEDNESDAY, FEBRUARY 13, 2008ALL TIMES ARE IN EASTERN STANDARD TIME SNOW CHANGED TO LIGHT FREEZING RAIN AFTER 3.0 INCHES    A total of 3.0 inches of snow covered by a thin glaze (crust)was measured at 7 a.m. An estimated 2 inches had fallen bymidnight after snow began about 7:30 p.m. A brief mixture ofsleet likely occurred between 1 and 2 a.m. before lightfreezing rain began as temperatures rose from 22 degrees at1 a.m. to 33 degrees at 7 a.m.  Precipation ended by 6 a.m.as light freezing rain.  The glaze accumulation was small andnot enough to measure. ASOS WIND AND PRECIPITATION ERROS FOR SEVERAL HOURS THIS MORNING Icing on the ASOS sonic wind sensors caused erroneous wind readingsto begin before 3 a.m. and then the system was shut down and data waslost. In addition, extremely erroneous hourly melted precipitationdata was reported between midnight and 3 a.m. and the correct datafor those hours in completely lost! Precipitation appeared to resumenormal reporting between 3 and 4 a.m. and wind data returned tonormal as temperatures rose above freezing between 7 and 8 a.m. WINDS GUSTS OVER 50 MPH S-SSE DURING NOON HOUR TODAY Wind increased rapidly as we broke into the warm air late thismorning. Temperatures reached 50 degrees while, for a time,the temperatures at the base of the hill we still in the middle30's late this morning!  Precipitation totaled 1.06 inches forboth last evening's snowfall and today's rainfall as of 1 p.m.this afternoon. Today's observations: 7 A.M.Weather: Obscurement with heavy fogTemperature: 33F, Dew point: 33F, Wind: ENE at 11 ktsWind: gradually veeringSea-level pressure: 29.90 inches Hg, falling Visibility: 1/16 mile6-hour min temp: 22F24-hour precipitation: unavailable at this time24-hour snowfall: 3.0 ins.Total snowcover on ground: 4 inchesBHO SA 1155 W2 X 1/16F 124/33/33/0711/990/ THN GLZ ALL SFCSWND GRDLY VEERING PRESFR TOTAL NEW SNW PST 24 HRS 3.0 INS/ 8////58047 ASOS 6//// ASOS 7//// MANUAL 6XXX/ MANUAL 7XXXX10033 20022 10 A.M.Weather: Obscurement with heavy fog and light rain occurringTemperature: 41F, Dew point: 41F, Wind: S at 13 ktsSea-level pressure: 29.78 inches Hg, falling rapidlyVisibility: 50 miles BHO SA 1455 W2 X 1/16R-F 085/41/41/1813/978/ RBXX/8//// 56039 ASOS 60005 MANUAL 6004/ 1 P.M.Weather: Low overcast stratus fractus with light rain and fogTemperature: 51F, Dew point: 51F, Wind: S at 22G36 ktsWind: Peak wind gust 45 kts from south at 14 minutes past this hourWind: Variable in direction ESE TO SSea-level pressure: 29.63 inches Hg, fallingVisibility: 4 miles  BHO SA 1755 E3 OVC 4R-F 033/51/51/1722G36/963/ STRA/STEAMFOG DRFTG OVR SMT VSBY OCNLY LWR PK WND 1745/14/ WND 12V19/8/7// 58052 MANUAL 6053/ ASOS 60059 10051 20033  WEATHER SUMMARY FOR TUESDAY, FEBRUARY 12 TEMPERATURE (DEGREES F)MAX.....26    NORMAL.....35MIN..... 9    NORMAL.....20MEAN....18    NORMAL.....28DEPARTURE FROM 30-YEAR NORMAL..........-10TOTAL DEPARTURE FOR THE MONTH..........+58 [+4.6 DEGREES/DAY] HEATING DEGREE DAYSTOTAL HEATING UNITS FOR YESTERDAY............47  DEPARTURE......+ 9TOTAL HEATING UNITS FOR THE MONTH...........401  DEPARTURE......-61TOTAL HEATING UNITS FOR THE SEASON.........3638  DEPARTURE.....-360TOTAL HEATING UNITS LAST SEASON TO DATE....3466  DIFFERENCE....+172  PEAK GUST AND AVERAGE WIND SPEED (MPH)PEAK WIND GUST FOR YESTERDAY............25 W   AT  1:10 A.M.*                     AEROVANE.............25 w   AT  1:10 A.M.                      ASOS.................24 W   AT  1:11 A.M.                      DAVIS................25 W   AT 12:01 A.M.      FASTEST MILE FOR YESTERDAY..............17 W   AT 12:07 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........18 W   AT 12:02 A.M.      MAXIMUM 2-MINUTE DAVIS AVERAGE..........20 W   AT 12:02 A.M.   AVERAGE WIND SPEED AND DIRECTION......  8.8 W                   ASOS.................8.4                   DAVIS................8.9 WSW [250 deg]    * Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.53  DEPARTURE......+0.39                           ASOS..............N/A *TOTAL PRECIPITATION FOR THE MONTH..........3.83  DEPARTURE......+2.08                         ASOS..............3.25# TOTAL PRECIPITATION FOR THE YEAR...........7.70  DEPARTURE......+1.17                         ASOS..............7.21# * ASOS PRECIPITATION DATA IN ERROR# ASOS PRECIPITATION NOT UPDATED FOR 2/12-13 EVENT SNOWFALL (INCHES) THROUGH THIS MORNING (EST)TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........3.0  DEPARTURE.....+2.4TOTAL SNOWFALL FOR THE MONTH................7.4  DEPARTURE.....-0.3TOTAL SNOWFALL FOR THE SEASON..............51.5  DEPARTURE....+14.4  PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2008 CALENDAR DAY DATADATA REPORTED:DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUSTAERO: Aerovane recording wind system when significantTSTM: Thunderstorm day....: Data not yet available, records not finalized 2/1  53/26/40/+14/1.16/0.1/000/00  54 SSE  Aero 59 MPH SSE TSTM2/2  51/34/43/+17/T/0/391/65       52 SW   Aero 52 MPH SW2/3  45/33/39/+13/0/0/381/63       21 SW2/4  38/29/34/+8/0/0/006/01        18 SE 2/5  45/33/39/+12/0.42/0/000/00    36 SE   Aero 37 MPH SE 2/6  46/34/40/+13/0.88/0/000/00    36 NE   Aero 33 MPH NE  TSTM2/7  34/26/30/+3/0.59/1.9/000/00   40 NE   Aero 40 MPH NE  TSTM2/8  28/24/26/-1/0.08/0.5/000/00   21 W2/9  36/21/29/+2/0.09/1.0/118/19   30 ESE2/10 40/11/26/-1/0.08/0.9/090/11   56 W    Aero 61 MPH W 2/11 22/7/15/-12/0/0/612/98        56 W    Aero 60 MPH W2/12 26/9/18/-10/X.XX/2.0/.../..   25 W  2/13 morning low temp. 22F; normal low is now 20F DAILY EXTREMESTemperature and precipitation records back to 1885, andwind records back to 1940 (e = estimated): RECORDS FOR FEBRUARY 13HIGH 64F IN 1951LOW -10F IN 1967PRECIP 1.90 INCHES IN 1966SNOWFALL 13.5 INCHES IN 1894PEAK GUST 60 MPH SE IN 1972 RECORDS FOR FEBRUARY 14HIGH 56F IN 1949LOW -8F IN 1979PRECIP 2.09 INCHES IN 2007SNOWFALL 11.0 INCHES IN 1914PEAK GUST 83 MPH SSW IN 2000 TODAY'S REPORT PREPARED By: Robert Skilling