BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, MARCH 1, 2009 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Overcast with light snow Temperature: 26F, Dew point: 21F, Wind: N at 15G21 kt Sea-level pressure: 30.19 inches Hg, falling Visibility: 30 miles prevailing; 80 miles to the NNW 6-hour minimum temperature: 26F 6-hour snowfall: Trace Snow depth on ground: zero BHO SA 1155 30 OVC 30S- 222/26/21/0115G21/019/ CLR DSNT W-NW VSBY W-NW 80 SB50/ 8/4// 58003 6000/ 70000 10027 20026 10 A.M. Weather: Overcast with snow and fog Temperature: 26F, Dew point: 24F, Wind: N at 15G27 kt Sea-level pressure: 30.17 inches Hg, falling Visibility: 1/2 mile BHO SA 1455 E10 OVC 1/2SF 216/26/24/0115G27/017/ WND BACKING PK WND 0232/0925/ 8/6// 600// 58006 1 P.M. Weather: Overcast with snow and fog Temperature: 22F, Dew point: 19F, Wind: N at 12G18 kt Sea-level pressure: 30.12 inches Hg, falling Visibility: 1/2 mile 6-hour maximum temperature: 26F BHO SA 1755 E10 OVC 1/2S-F 196/22/19/3512G18/012/ TOTAL NEW SNW PST 6 HR 0.9 IN PK WND 3428/1724/ 8/6// 56020 6009/ 10026 20022 WEATHER SUMMARY FOR SATURDAY, FEBRUARY 28 TEMPERATURE (DEGREES F) MAX.....49 NORMAL.....40 MIN.....28 NORMAL.....23 MEAN....39 NORMAL.....31 DEPARTURE FROM 30-YEAR NORMAL.................+8 TOTAL DEPARTURE FOR THE MONTH................+69 [+2.3 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............26 DEPARTURE.........-8 TOTAL HEATING UNITS FOR THE MONTH............959 DEPARTURE........-75 TOTAL HEATING UNITS FOR THE SEASON..........4527 DEPARTURE........-43 TOTAL HEATING UNITS LAST SEASON TO DATE.....4199 DIFFERENCE......+328 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............33 WNW AT 9:02 A.M. * AEROVANE.............32 WNW AT 9:02 A.M. * ASOS.................33 SSW AT 12:27 A.M. DAVIS................35 S AT 12:26 A.M. FASTEST MILE FOR YESTERDAY..............26 S AT 12:09 A.M MAXIMUM 2-MINUTE ASOS AVERAGE...........25 SSW AT 12:09 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........25 S AT 1:02 A.M. AVERAGE............14.1 WNW ASOS...............13.2 DAVIS..............13.7 WNW [290 DEGREES] * Last of several occurrences.... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....TRACE DEPARTURE.........-0.15 ASOS...............0.00 TOTAL PRECIPITATION FOR THE MONTH...........2.37 DEPARTURE.........-1.69 ASOS...............2.42 TOTAL PRECIPITATION FOR THE YEAR............6.53 DEPARTURE.........-2.31 ASOS...............7.62 # # 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........TRACE DEPARTURE.........-0.5 TOTAL SNOWFALL FOR THE MONTH...............10.2 DEPARTURE.........-5.8 TOTAL SNOWFALL FOR THE SEASON..............65.3 DEPARTURE........+19.9 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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 2/1 45/15/30/+4/0/0/402/67 35 SW 2/2 50/32/41/+15/0/0/568/94 29 NNW 2/3 33/22/28/+2/0.44/5.6/000/00 39 N AERO 38 MPH N 2/4 24/10/17/-9/0.05/0.9/572/94 37 WNW 2/5 17/3/10/-17/0/0/538/88 33 W 2/6 26/4/15/-12/0/0/509/83 26 W 2/7 42/16/29/+2/0/0/314/51 45 S AERO 44 MPH S 2/8 49/30/40/+13/0/0/433/70 54 W AERO 54 MPH W 2/9 37/21/29/+2/0/0/621/100 38 WNW AERO 38 MPH WNW 2/10 36/22/29/+2/0/0/006/01 21 SSE 2/11 59/34/47/+20/0/0/482/77 29 SSE 2/12 51/37/44/+16/0.13/0/063/10 54 WSW AERO 54 MPH WSW 2/13 38/24/31/+3/0/429/68 47 W AERO 47 MPH W 2/14 39/20/30/+2/0/0/595/94 42 W AERO 40 MPH W 2/15 39/23/31/+3/0/0/637/100 30 NW AERO 28 MPH NW 2/16 35/21/28/0/0/0/633/99 23 NW 2/17 35/19/27/-2/0/0/641/100 21 NW 2/18 41/24/33/+4/0.25/1.6/361/56 33 E 2/19 46/24/35/+6/0.34/0.4/155/24 43 W AERO 44 MPH W 2/20 27/18/23/-6/T/T/364/56 50 W AERO 48 MPH W 2/21 37/23/30/+1/0/0/626/96 42 W AERO 37 MPH W 2/22 41/28/35/+5/0.83/1.7/000/00 46 W AERO 48 MPH W 2/23 31/18/25/-5/T/T/507/77 51 W AERO 53 MPH W 2/24 34/15/25/-5/0/0/661/100 35 WNW AERO 28 MPH WNW 2/25 37/17/27/-4/0/0/431/65 22 NW 2/26 47/26/37/+6/0/0/.../.. 31 S 2/27 58/34/46/+15/.../0/.../.. 58 S AERO 59 MPH S 2/28 49/28/39/+8/.../../.../.. 33 WNW NEW DAILY RECORDS FOR FEBRUARY 2009... None to date DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MARCH 1 HIGH 62 IN 1972 LOW -3 IN 1886 PRECIP 1.65 INS. IN 1900 SNOWFALL 9.4 INS. IN 1949 PEAK GUST 78 WSW IN 1966 RECORDS FOR MARCH 2 HIGH 63 IN 2004 LOW -3 IN 1886 PRECIP 2.15 INS. IN 1983 SNOWFALL 7.1 INS. IN 1948 PEAK GUST 75 MPH NW IN 1966 TODAY'S REPORT PREPARED By: Andrew Hoell