BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, FEBRUARY 17, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME POSTPONED: EXTREME WEATHER PRESENTATION AND BOOK SIGNING WITH AUTHOR H. MICHAEL MOGIL; RESCHEDULED FOR SUNDAY MAY 4, 2008 On Sunday May 4, H. Michael Mogil, author of Tornadoes and his new book Extreme Weather, will give an engaging talk about all kinds of weather including blizzards, hurricanes, tornadoes and more! For more information, please visit our website: http://www.bluehill.org Today's observations: 7 A.M. Weather: Thin broken cirrus Temperature: 22F, Dew point: 8F, Wind: SSE at 12G16 kt Sea-level pressure: 30.36 inches Hg, rising Visibility: 55 miles 6-hour min temp: 18F BHO SA 1155 200 SCT 250 -BKN 55 282/22/8/1612G16/036/ 8/001 51008 10022 20018 10 A.M. Weather: Thin scattered cirrus Temperature: 33F, Dew point: 15F, Wind: S at 15G23 Sea-level pressure: 30.33 inches Hg, falling Visibility: 40 miles BHO SA 1455 250 -SCT 40 272/33/15/1715G23/033/ 8/001 58010 WEATHER SUMMARY FOR SATURDAY, FEBRUARY 16 TEMPERATURE (DEGREES F) MAX.....29 NORMAL.....36 MIN.....16 NORMAL.....20 MEAN....23 NORMAL.....28 DEPARTURE FROM 30-YEAR NORMAL..........- 5 TOTAL DEPARTURE FOR THE MONTH..........+73 [+4.6 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............42 DEPARTURE......+ 5 TOTAL HEATING UNITS FOR THE MONTH...........534 DEPARTURE......-75 TOTAL HEATING UNITS FOR THE SEASON.........3771 DEPARTURE.....-375 TOTAL HEATING UNITS LAST SEASON TO DATE....3654 DIFFERENCE....+117 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............32 W AT 12:42 A.M. AEROVANE.............29 W AT 12:40 A.M. ASOS.................31 W AT 12:42 A.M. DAVIS................34 WSW AT 12:41 A.M. FASTEST MILE FOR YESTERDAY..............24 W AT 1:43 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........22 WNW AT 1:44 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........24 W AT 12:43 A.M. AVERAGE WIND SPEED AND DIRECTION......10.0 W ASOS................9.7 DAVIS..............10.5 WNW [285 deg] * last of sveral 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..........6.37 DEPARTURE......+4.06 ASOS..............N/A # TOTAL PRECIPITATION FOR THE YEAR...........10.24 DEPARTURE......+3.15 ASOS..............N/A # # ASOS PRECIPITATION DATA ERROR ON 2/13/08 MONTHLY AND 2008 ASOS TOTAL NOT AVAILABLE SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.5 TOTAL SNOWFALL FOR THE MONTH................7.4 DEPARTURE.....-2.6 TOTAL SNOWFALL FOR THE SEASON..............51.5 DEPARTURE....+12.1 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2008 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: 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 TSTM 2/2 51/34/43/+17/T/0/391/65 52 SW Aero 52 MPH SW 2/3 45/33/39/+13/0/0/381/63 21 SW 2/4 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 TSTM 2/7 34/26/30/+3/0.59/1.9/000/00 40 NE Aero 40 MPH NE TSTM 2/8 28/24/26/-1/0.08/0.5/000/00 21 W 2/9 36/21/29/+2/0.09/1.0/118/19 30 ESE 2/10 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 W 2/12 26/9/18/-10/0.27/2.0/.../.. 25 W 2/13 53/22/38/+10/2.80/1.0/000/00 52 S Aero 54 MPH S 2/14 36/26/31/+3/0/0/.../.. 39 WNW 2/15 46/24/35/+7/0/0/.../.. 47 W Aero 50 MPH W 2/16 29/16/23/-5/0/0/.../.. 32 W NEW DAILY RECORDS FOR FEBRUARY 2008: 2/13 - New record daily precipitation 2.80 inches; surpasses previous record of 1.90 inches in 1966 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 65e MPH NNW IN 1952 TODAY'S REPORT PREPARED By: Andrew Hoell