BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, MARCH 30, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED Today's observations: 8 A.M. EDT Weather: Clear Temperature: 24F, Dew point: 8F Wind: WNW at 10 kt Sea-level pressure: 30.63 inches Hg, rising Visibility: 65 miles 6-hour min temp: 19F BHO SA 1155 CLR 65 372/24/8/2910/063/ 8/000 53024 10024 20019 11 A.M. EDT Weather: Clear Temperature: 36F, Dew point: 8F, Wind: NW at 10G12 kt Sea-level pressure: 30.69 inches Hg, rising Visibility: 65 miles BHO SA 1455 CLR 65 392/36/8/3110G12/069/ 8/000 51020 2 P.M. EDT Weather: Clear Temperature: 41F, Dew point: 10F, Wind: ENE at 8 kt, variable Sea-level pressure: 30.69 inches Hg, steady Visibility: 65 miles 6-hourly max. 42 temp. F BHO SA 1755 CLR 65 392/41/10/0608/069/ WND 35V13/ 8/000 55000 10042 20024 WEATHER SUMMARY FOR SATURDAY, MARCH 29 TEMPERATURE (DEGREES F) MAX.....35 NORMAL.....49 MIN.....24 NORMAL.....32 MEAN....30 NORMAL.....40 DEPARTURE FROM 30-YEAR NORMAL..........-10 TOTAL DEPARTURE FOR THE MONTH..........+13 [+0.3 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............35 DEPARTURE.......+11 TOTAL HEATING UNITS FOR THE MONTH...........829 DEPARTURE.......-16 TOTAL HEATING UNITS FOR THE SEASON.........5077 DEPARTURE......-339 TOTAL HEATING UNITS LAST SEASON TO DATE....4955 DIFFERENCE.....+122 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............42 WNW AT 12:41 P.M. AEROVANE.............42 WNW AT 12:20 P.M. ASOS.................38 NW AT 12:41 P.M. DAVIS................40 WNW AT 12:29 P.M. FASTEST MILE FOR YESTERDAY..............34 WNW AT 12:41 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........30 NW AT 12:41 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........32 WNW AT 12:41 P.M. AVERAGE WIND SPEED AND DIRECTION......17.3 WNW ASOS...............16.7 DAVIS..............17.2 WNW [295 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE......-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........5.39 DEPARTURE......+0.90 ASOS..............5.36 TOTAL PRECIPITATION FOR THE YEAR..........17.43 DEPARTURE......+4.10 ASOS.............19.67 # # Includes erroneous ASOS precipitation data on 2/13/08. SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.2 TOTAL SNOWFALL FOR THE MONTH................6.4 DEPARTURE.....-4.7 TOTAL SNOWFALL FOR THE SEASON..............66.5 DEPARTURE....+10.0 PRELIMINARY CLIMATE SUMMARY FOR MARCH 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 3/1 37/20/29/-3/0.34/3.2/034/05 38 W Aero 40 MPH W 3/2 37/23/30/-2/0/0/564/83 40 WNW 3/3 46/24/35/+3/0/0/327/48 42 S Aero 43 MPH S 3/4 58/36/47/+14/0.41/0/089/13 42 S Aero 43 MPH S 3/5 57/33/45/+12/0.31/0/199/29 45 S 3/6 46/27/37/+4/0/0/573/83 27 WSW 3/7 44/31/38/+5/0.28/0/395/57 29 NE 3/8 61/35/48/+14/2.20/0/000/00 69 SSW Aero 70 MPH S 3/9 47/24/36/+2/0/0/698/100 65 W Aero 65 MPH W 3/10 38/19/29/-5/0/0/687/98 31 W 3/11 42/19/31/-4/0/0/690/98 31 S 3/12 40/30/35/0/0.26/0.6/120/17 41 WNW 3/13 43/25/34/-1/T/T/490/69 31 W 3/14 53/30/42/+6/0.01/0/135/19 24 ENE 3/15 37/32/35/-1/0.51/1.9/000/00 39 NNE 3/16 40/31/36/0/T/T/014/02 42 WNW Aero 42 MPH WNW 3/17 41/25/33/-4/0/0/692/96 42 WNW Aero 39 MPH WNW 3/18 43/24/34/-3/0.02/0.1/493/68 22 NNE 3/19 43/30/37/0/0.53/0.5/000/00 28 ESE 3/20 50/32/41/+3/0.27/0/007/01 51 W 3/21 38/26/32/-6/0/0/704/96 61 W Aero 58 MPH W 3/22 45/25/35/-3/0/0/692/94 44 W Aero 44 MPH W 3/23 43/24/34/-4/0/0/717/97 25 WNW 3/24 46/24/35/-4/0/0/659/89 21 WNW 3/25 39/25/32/-7/T/T/618/83 35 S 3/26 57/35/46/+7/T/T/.../.. 46 S 3/27 52/35/44/+4/T/0/.../.. 31 SSW 3/28 40/32/36/-4/.../0/000/00 29 ENE 3/29 35/24/30/-10/.../../.../.. 42 WNW Aero 42 MPH WNW NEW DAILY RECORDS FOR MARCH 2008 3/8 PEAK WIND GUST - 69 MPH SSW; PREVIOUSLY 68e MPH NE, 1941 3/8 NEW RECORD MAXIMUM DAILY RAINFALL of 2.20 inches; the previous record was 1.73 inches in 1933. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MARCH 30 HIGH 83 IN 1977 LOW 10 IN 1887 PRECIP 2.82 INCHES IN 2001 SNOWFALL 3.9 INCHES IN 1957 PEAK GUST 60 MPH NW IN 1999 RECORDS FOR MARCH 31 HIGH 89 IN 1998 [RECORD HIGH FOR MONTH] LOW 16 IN 1923 PRECIP 2.89 INCHES IN 1987 SNOWFALL 15.0 INCHES IN 1997 PEAK GUST 81 MPH SSE IN 1987 TODAY'S REPORT PREPARED By: Andrew Hoell