BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, FEBRUARY 11, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME MUCH COLDER THAN NORMAL WEATHER DURING PAST WEEK BUT THE COLD HAS FINALLY RELAXED ITS GRIP PAST COUPLE OF DAYS Temperatures averaged 9.4 degrees colder than normal during the week ending yesterday, February 10th. The month is still close to 6 degrees colder than average to date but yesterday the high temperature made it back up to 32 degrees for the first time in a week. After averaging 12 degrees on the cold side of normal from February 4-8, the mean temperature finally got back to just 4 degrees below average on Saturday. Today's observations: 7 A.M. Weather: Scattered high cirrus, cirrocumulus clouds, and stratocumulus clouds offshore NNE-ESE Temperature: 14F, Dew point: 6F, Wind: W at 10 kts Sea-level pressure: 30.17 inces Hg, rising Visibility: 55 miles Snow on ground: trace 6-hourly min. temp. 14 deg. BHO SA 1155 220 SCT 55 215/14/6/2610/017/ SC LYR OFFSHR DSNT NNE-ESE SC ALG HRZN DSNT SSE-S PTCH CI/CC WNW-NNE VSBY NW 65/ 8/501 51019 10018 20014 10 A.M. Weather: Clear, few stratocumulus clouds distant offshore NE-ESE and few thin cirrus clouds SW-N Temperature: 23F, Dew point: 5F, Wind: W at 6 kts Sea-level pressure: 30.21 inches Hg, rising Visibility: 70 miles BHO SA 1455 CLR 70 229/23/5/2606/021/ FEW SC OFFSHR DSNT ENE-ESE FEW CI SW-N/ 8/501 51014 WEATHER SUMMARY FOR SATURDAY, FEBRUARY 10 TEMPERATURE (DEGREES F) MAX.....32 NORMAL.....35 MIN.....13 NORMAL.....19 MEAN....23 NORMAL.....27 DEPARTURE FROM 30-YEAR NORMAL..........-4 TOTAL DEPARTURE FOR THE MONTH.........-59 (-6.1 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........42 DEPARTURE........+4 TOTAL HEATING UNITS FOR THE MONTH.........443 DEPARTURE.......+57 TOTAL HEATING UNITS FOR THE SEASON.......3387 DEPARTURE......-535 TOTAL HEATING UNITS LAST SEASON TO DATE..3405 DIFFERENCE......-18 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............28 W AT 9:49 P.M. * AEROVANE.............25 W AT 9:49 P.M. * ASOS.................24 W AT 7:51 P.M. DAVIS................27 WSW AT 7:15 P.M. FASTEST MILE FOR YESTERDAY..............18 W AT 9:27 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........18 W AT 7:17 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........20 W AT 7:16 P.M. AVERAGE WIND SPEED AND DIRECTION......12.0 W ASOS..............12.2 DAVIS.............12.6 W [260 deg] * last of several occurrences... 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..........0.23 DEPARTURE.....-1.24 ASOS..............0.22 TOTAL PRECIPITATION FOR THE YEAR...........3.17 DEPARTURE.....-3.08 ASOS..............3.09 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE......-0.6 TOTAL SNOWFALL FOR THE MONTH................0.7 DEPARTURE......-5.8 TOTAL SNOWFALL FOR THE SEASON...............7.3 DEPARTURE.....-28.6 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2007......CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 2/1 35/20/28/+2/0/0/126/21 37 S Aero 34 MPH S 2/2 35/28/32/+6/0.18/0.3/000/00 20 NW 2/3 32/19/26/0/0.05/0.4/574/95 39 W Aero 47 MPH W 2/4 22/10/16/-10/0/0/601/99 39 WSW Aero 40 MPH WSW 2/5 16/5/11/-16/0/0/493/81 61 W Aero 60 MPH W 2/6 24/10/17/-10/0/0/593/97 38 W Aero 36 MPH W 2/7 21/8/15/-12/0/0/474/77 43 W Aero 41 MPH W 2/8 25/11/18/-9/0/0/370/60 48 WSW 2/9 26/15/21/-6/0/0/.../.. 44 WSW Aero 42 MPH WSW 2/10 32/13/23/-4/0/0/.../.. 28 W 2/11 morning low temp. 14 deg; normal now 19 deg. a trace of snow remains on the ground DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR FEBRUARY 11 HIGH 60F IN 1981 LOW -10F IN 1899 PRECIP 1.07 INCHES IN 1955 SNOWFALL 9.6 INCHES IN 1933 PEAK GUST 95 MPH S IN 1981 RECORDS FOR FEBRUARY 12 HIGH 56F IN 1999 LOW -14F IN 1914 PRECIP 4.85 INCHES IN 1886 [RECORD FOR MONTH] SNOWFALL 11.0 INCHES IN 1983 PEAK GUST 70 MPH E IN 1985 TODAY'S REPORT By: Robert Skilling