BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, MARCH 4, 2010 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Scattered stratus, overcast stratocumulus Temperature: 31F, Dew point: 27F, Wind: NNW at 12G20 kts, Wind: Direction variable WNW to NNE Sea-level pressure: 29.55 inches Hg, rising Visibility: 75 miles 6-hour minimum temp: 30F 24 hour precip: 0.18 in. 24-hour snowfall: 1.6 in. Average snow depth: 1 inch BHO SA 1155 25 SCT E40 OVC 75 007/31/27/3312G20/955/ TOTAL NEW SNW PST 24 HRS 1.6 INS WND 29V02/ 8/5// 4/001 51008 MANUAL 600X/ ASOS 60002 MANUAL 70018 ASOS 70016 10032 20030 10 A.M. Weather: Overcast stratus, light snow and fog Temperature: 31F, Dew point: 31F, Wind: NNW at 10G22 kts, Wind: Direction variable WNW to NNE Sea-level pressure: 29.61 inches Hg, rising Visibility: 2 miles, light snow and fog 3-hourly snowfall: 0.2 inch BHO SA 1455 E30 OVC 2S-F 026/31/31/3410G22/961/ TOTAL NEW SNW PST 3 HRS 0.2 IN WND 29V03/ 8/7// 53019 MANUAL 600X/ ASOS 60001 1 P.M. Weather: Overcast stratus, light snow and fog Temperature: 33F, Dew point: 31F, Wind: NNW at 13G19 kts, Wind: Direction variabile W to N Sea-level pressure: 29.62 inches Hg, rising Visibility: 3 miles, light snow and fog 6-hourly maximum temp: 33F 6-hourly precip: 0.04 inch 6-hourly snowfall: 0.6 inch BHO SA 1755 E10 OVC 3S-F 031/33/31/3313G19/962/ TOTAL NEW SNW PST 6 HRS 0.6 IN WND 26V36/ 8/7// 51005 MANUAL 6004/ ASOS 60005 10033 20031 WEATHER SUMMARY FOR WEDNESDAY, MARCH 3 TEMPERATURE (DEGREES F) MAX.....34 NORMAL.....41 MIN.....31 NORMAL.....24 MEAN....33 NORMAL.....32 DEPARTURE FROM 30-YEAR AVERAGE..............+1 TOTAL DEPARTURE FOR THE MONTH..............+13 [+4.1 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............32 DEPARTURE........-1 TOTAL HEATING UNITS FOR THE MONTH........... 86 DEPARTURE.......-14 TOTAL HEATING UNITS FOR THE SEASON.........4486 DEPARTURE......-184 TOTAL HEATING UNITS LAST SEASON TO DATE....4660 DIFFERENCE.....-174 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............45 NNE AT 1:30 P.M. AEROVANE..............43 NNE AT 1:30 P.M. ASOS..................46 NE AT 1:31 P.M. DAVIS.................46 N AT 1:30 P.M. THE FASTEST MILE FOR YESTERDAY...........29 NNE AT 1:30 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............28 NE AT 1:32 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........28 N AT 3:48 P.M. AVERAGE WIND SPEED AND DIRECTION.........16.1 N ASOS..................15.0 DAVIS.................15.0 NNE [014 DEG] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.18 DEPARTURE....+0.03 ASOS..............0.16 TOTAL PRECIPITATION FOR THE MONTH .........0.58 DEPARTURE....+0.13 ASOS..............0.52 TOTAL PRECIPITATION FOR THE YEAR ..........9.68 DEPARTURE....+0.39 ASOS..............9.64 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........1.6 DEPARTURE......+1.1 TOTAL SNOWFALL FOR THE MONTH............... 5.0 DEPARTURE......+3.5 TOTAL SNOWFALL FOR THE SEASON THRU FEB.....61.5 DEPARTURE.....+14.6 PRELIMINARY CLIMATE SUMMARY FOR MARCH 2010 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 3/1 44/33/38/+6/0.38/3.2/047/07 43 NW AERO 42 MPH NW 3/2 43/32/38/+6/0/0/.../.. 22 NNE 3/3 34/31/33/+1/.../../000/00 45 NNE 3/4 our morning low temp: 30F; the normal low is now 24F NEW DAILY RECORDS FOR MARCH 2010 None. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MARCH 4 HIGH 69 IN 1974 LOW -5 IN 1950 PRECIP 1.80 IN 1960 SNOWFALL 17.3 IN 1960 PEAK GUST 81e MPH SSW IN 1971 RECORDS FOR MARCH 5 HIGH 64 IN 1979 LOW -2 IN 1948 PRECIP 1.76 INS. IN 2001 SNOWFALL 13.0 INS. IN 1891 PEAK GUST 76e MPH WNW IN 1971 TODAY'S REPORT PREPARED BY: Stephanie Radner