BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, MARCH 8, 2009 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Overcast with a few breaks Temperature: 45F, Dew point: 42F, Wind: WNW at 13 kt Sea-level pressure: 29.75 inches Hg, rising Visibility: 6 miles, hazy 6-hour minimum temperature: 45F Snow depth on ground: None BHO SA 1155 30 BKN 120 OVC 6 073/45/42/3013/975/ HIER CLDS VSBL FEW BINOVC ALQDS/ 8/764 53034 70006 10052 20045 10 A.M. Weather: Overcast with thin spots in the high overcast Temperature: 50F, Dew point: 39F, Wind: WNW at 24G32 kt Sea-level pressure: 29.85 inches Hg, rising Visibility: 60 miles BHO SA 1455 30 SCT 160 SCT 200 OVC 60 109/50/39/3024G32/985/ FEW THN SPTS IOVC ALQDS PK WND 3034/1455/ 8/754 51036 1 P.M. Weather: Few stratocumulus, scattered altocumulus, thin broken cirrus Temperature: 55F, Dew point: 34F, Wind: WNW at 14G21 kt Sea-level pressure: 29.88 inches Hg, rising Visibility: 80 miles 6-hour maximum temperature: 55F BHO SA 1755 160 SCT 200 –BKN 80 119/55/34/3014G21/988/ FEW SC DSNT NW-N/ 8/441 50010 10055 20044 WEATHER SUMMARY FOR SATURDAY, MARCH 7, 2009 TEMPERATURE (DEGREES F) MAX.....60 NORMAL.....42 MIN.....42 NORMAL.....25 MEAN....51 NORMAL.....33 DEPARTURE FROM 30-YEAR NORMAL.................+18 TOTAL DEPARTURE FOR THE MONTH.................-29 [-4.3 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............14 DEPARTURE........-18 TOTAL HEATING UNITS FOR THE MONTH............256 DEPARTURE........+27 TOTAL HEATING UNITS FOR THE SEASON..........4783 DEPARTURE........-16 TOTAL HEATING UNITS LAST SEASON TO DATE.....4442 DIFFERENCE......+341 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............37 S AT 11:56 P.M. AEROVANE.............35 SSE AT 11:45 P.M. ASOS.................36 S AT 11:44 P.M. DAVIS................36 S AT 11:57 P.M. FASTEST MILE FOR YESTERDAY..............26 S AT 11:57 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........26 S AT 11:57 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........26 S AT 11:48 P.M. AVERAGE............14.4 SW ASOS...............13.3 DAVIS..............13.3 SSW [216 DEGREES] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.06 DEPARTURE.........-0.09 ASOS...............0.06 TOTAL PRECIPITATION FOR THE MONTH...........1.54 DEPARTURE.........+0.49 ASOS...............1.40 TOTAL PRECIPITATION FOR THE YEAR............8.07 DEPARTURE.........-1.82 ASOS...............9.02 # # Includes erroneous ASOS precipitation data on 1/1/09, 1/2/09 and 2/27/09. SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.........-0.4 TOTAL SNOWFALL FOR THE MONTH...............10.2 DEPARTURE.........+6.8 TOTAL SNOWFALL FOR THE SEASON..............75.5 DEPARTURE........+26.7 PRELIMINARY CLIMATE SUMMARY FOR MARCH 2009 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 3/1 28/21/25/-7/0.26/1.9/000/00 38 NNE 3/2 22/15/19/-13/1.16/8.2/000/00 40 NNE AERO 37 MPH NNE 3/3 25/11/18/-14/0.01/0.1/640/94 33 NW 3/4 30/6/18/-14/0/0/684/100 31 WNW 3/5 39/16/28/-5/0/0/659/96 25 WSW 3/6 49/30/40/+7/T/0/.../.. 43 S AERO 41 MPH S 3/7 60/42/51/+18/.../.../.../.. 37 S NEW DAILY RECORDS FOR MARCH 2009... 3/2: DAILY SNOWFALL 8.2 INS. SURPASSES PREVIOUS RECORD OF 7.1 INS. IN 1948 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MARCH 8 HIGH 63 IN 1942, 1995 LOW 2 IN 1986 PRECIP 2.20 INS. IN 2008 SNOWFALL 8.3 INS. IN 1941 PEAK GUST 69 MPH SSW IN 2008 RECORDS FOR MARCH 9 HIGH 71 IN 2000 LOW 1 IN 2007 PRECIP 2.67 INS. IN 1998 SNOWFALL 6.3 INS. IN 2001 PEAK GUST 102e MPH S IN 1942 [RECORD FOR MONTH] TODAY'S REPORT PREPARED BY: Andrew Hoell