BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, MARCH 29, 2009 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Obscured by light drizzle and fog Temperature: 38F, Dew point: 38F, Wind: NNE at 20G28 kt Sea-level pressure: 29.75 inches Hg, falling Visibility: 1/16 of a mile 6-hour minimum temperature: 37F 24-hour precipitation: 0.08 inches BHO SA 1155 W2 X1 1/16L-F 073/38/38/0320G28/975/ PK WND 0328/1148/ 8//// 58031 6//// 70008 10039 20037 10 A.M. Weather: Obscured; rain and fog Temperature: 38F, Dew point: 38F, Wind: NE at 18G26 kt Sea-level pressure: 29.68 inches Hg, falling Visibility: 1/16 of a mile BHO SA 1455 W2 X1 1/16RF 051/38/38/0518G26/968/ PK WND 0434/1427 WND VEERING/ 8//// 58022 6//// 1 P.M. Weather: Obscured by light drizzle and fog Temperature: 41F, Dew point: 41F, Wind: N at 14G19 kt Sea-level pressure: 29.57 inches Hg, falling Visibility: 1/16 of a mile 6-hour maximum temperature: 41F 6-hour precipitation: 0.42 inches BHO SA 1755 W2 X1 1/16L-F 012/41/41/3514G19/957/ WND BACKING/ 8//// 56039 6042/ 10041 20038 WEATHER SUMMARY FOR SATURDAY, MARCH 28, 2009 TEMPERATURE (DEGREES F) MAX.....58 NORMAL.....49 MIN.....39 NORMAL.....31 MEAN....49 NORMAL.....40 DEPARTURE FROM 30-YEAR NORMAL..................+9 TOTAL DEPARTURE FOR THE MONTH..................-1 [0 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............16 DEPARTURE.........-9 TOTAL HEATING UNITS FOR THE MONTH............818 DEPARTURE.........-3 TOTAL HEATING UNITS FOR THE SEASON..........5345 DEPARTURE........-46 TOTAL HEATING UNITS LAST SEASON TO DATE.....5042 DIFFERENCE......+303 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............22 S AT 12:00 A.M. AEROVANE.............18 SSE AT 3:50 A.M. ASOS.................20 S AT 3:56 A.M. DAVIS................21 SSE AT 3:51 A.M. FASTEST MILE FOR YESTERDAY..............15 SSE AT 3:56 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........16 S AT 3:57 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........N/A AVERAGE.............8.0 SSE ASOS................7.7 DAVIS...............8.3 ESE [110 DEGREES] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.08 DEPARTURE.........-0.07 ASOS...............0.08 TOTAL PRECIPITATION FOR THE MONTH...........2.88 DEPARTURE.........-1.46 ASOS...............2.80 TOTAL PRECIPITATION FOR THE YEAR............9.41 DEPARTURE.........-3.77 ASOS..............10.42 # # 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.........-0.2 TOTAL SNOWFALL FOR THE MONTH...............13.4 DEPARTURE.........+2.5 TOTAL SNOWFALL FOR THE SEASON..............78.7 DEPARTURE........+22.4 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/-13/1.21/8.2/000/00 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/0/152/22 43 S AERO 41 MPH S 3/7 60/42/51/+18/0.06/0/429/62 37 S 3/8 57/42/50/+16/0/0/445/64 39 WNW AERO 40 MPH WNW 3/9 42/28/35/+1/0.72/3.2/000/00 33 N 3/10 42/26/34/0/0.02/0/470/67 23 SSE 3/11 50/33/42/+7/0.13/0/000/00 51 W 3/12 39/25/32/-3/0/0/685/97 44 W AERO 45 MPH W 3/13 37/19/28/-7/0/0/660/93 26 SSE 3/14 50/25/38/+2/0/0/613/86 24 SSW 3/15 59/34/47/+11/0/0/686/96 17 SSW 3/16 42/29/36/0/0/0/000/00 30 NE 3/17 47/28/38/0/+1/671/93 21 SSW 3/18 59/31/45/+8/0/0/448/62 37 SSW AERO 40 MPH S 3/19 45/36/41/+4/0.04/0/000/00 22 S 3/20 36/25/31/-7/0/0/650/89 26 NNE 3/21 43/23/33/-5/0/0/704/96 21 S 3/22 50/27/39/+1/0/0/206/28 29 NW AERO 31 MPH WNW 3/23 32/18/25/-13/0/0/694/94 38 NW 3/24 44/18/31/-8/0/0/630/85 33 NW AERO 37 MPH NW 3/25 49/29/39/0/0/0/670/90 25 N 3/26 53/33/43/+4/0.25/0/298/40 23 SE 3/27 57/36/47/+7/0.10/0/.../.. 22 S 3/28 58/39/49/+9/0/0/.../.. 22 S NEW DAILY RECORDS FOR MARCH 2009... 3/2: DAILY SNOWFALL 8.2 INS. SURPASSES PREVIOUS RECORD OF 7.1 INS. IN 1948 3/7: DAILY MINIMUM 42 TIES RECORD HIGH MINIMUM FOR DATE PREVIOUSLY SET IN 1974 AND 1987 3/8: DAILY MINIMUM 42 TIES RECORD HIGH MINIMUM FOR DATE PREVIOUSLY SET IN 1995 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 INS. IN 2001 SNOWFALL 3.9 INS. 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 IN 1987 SNOWFALL 15.0 IN 1997 PEAK GUST 81 MPH SSE IN 1987 TODAY'S REPORT PREPARED BY: Andrew Hoell