BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, FEBRUARY 28, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME ABOVE NORMAL TEMPERATURES TO END COLD FEBRUARY BRIEF SNOW FLURRY VERY EARLY LEFT JUST A TRACE Today's temperatures will average several degrees warmer than average and February will end up averaging about four and a half degrees colder than normal at 23.8 degrees. A very light snow flurry very early today left a very light dusting and so February snowfall remains at 7.3 inches or less than half the normal for the month. The seasonal snowfall is 13.9 inches and may be our second lowest total on record. Today's observations: 7 A.M. Weather: Scattered clouds and light fog Temperature: 29F, Dew point: 28F, Wind: WNW at 06 kts Sea-level pressure: 30.02 inches Hg, rising Visibility: 5 miles, SE-S 2 miles, higher SW-N 6-hourly min. temp. 28 deg. 24-hourly snowfall: trace Snow depth: 2 inches BHO SA 1155 70 SCT 5F 165/29/28/3006/002/ FG BLO SMT/INVSN ALQDS ESTMTD TOP 6 HND VSBY SE-S 2 SW-NW 8 ABV INVSN N 10 ABV INVSN VSBY INCRSD RPDLY PST HR FROST AND PTCHS BLACK ICE/ 8/070 4/002 53014 10032 20028 10 A.M. Weather: Scattered clouds Temperature: 38F, Dew point: 23F, Wind: NW at 10 kts Sea-level pressure: 30.04 inches Hg, rising Visibility: 30 miles BHO SA 1455 70 SCT 30 173/38/23/3210/004/ CU/MDT CU FRMG SE-S AND FEW CU FRMG DSNT SW-NW LGT HZ VSBY NE-SE 20/ 8/230 51008 1 P.M. Weather: Scattered clouds Temperature: 42F, Dew point: 21F, Wind: WNW at 08 kts Sea-level pressure: 30.02 inches Hg, falling Visibility: 50 miles, lower NE-SE BHO SA 1755 50 SCT 80 SCT 50 165/42/21/2908/002/ WND 26V33 VSBY LWR NE-SE LGT HZ/ 8/440 58008 10043 20029 WEATHER SUMMARY FOR TUESDAY, FEBRUARY 27 TEMPERATURE (DEGREES F) MAX.....39 NORMAL.....39 MIN.....27 NORMAL.....23 MEAN....33 NORMAL.....31 DEPARTURE FROM 30-YEAR NORMAL..........+2 TOTAL DEPARTURE FOR THE MONTH........-124 (-4.8 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........32 DEPARTURE........-2 TOTAL HEATING UNITS FOR THE MONTH........1118 DEPARTURE......+118 TOTAL HEATING UNITS FOR THE SEASON.......4062 DEPARTURE......-474 TOTAL HEATING UNITS LAST SEASON TO DATE..4048 DIFFERENCE......+14 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............14 SSW AT 11:22 P.M. AEROVANE.............10 SSW AT 11:18 P.M. ** ASOS.................12 SSW AT 11:42 P.M. DAVIS................14 S AT 10:54 P.M. FASTEST MILE FOR YESTERDAY..............09 SSW AT 11:19 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........10 SSW AT 11:18 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........11 S AT 11:13 P.M. AVERAGE WIND SPEED AND DIRECTION...... 4.5 W ASOS.............. 5.4 DAVIS............. 4.6 SW [230 deg] ** last of several occurrences and possible malfunction.... 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..........2.78 DEPARTURE.....-1.13 ASOS..............2.76 TOTAL PRECIPITATION FOR THE YEAR...........5.72 DEPARTURE.....-2.97 ASOS..............5.63 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M........trace DEPARTURE......-0.5 TOTAL SNOWFALL FOR THE MONTH................7.3 DEPARTURE......-8.2 TOTAL SNOWFALL FOR THE SEASON..............13.9 DEPARTURE.....-31.0 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2007......CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 2/1 35/20/28/+2/0/0/126/21 37 S Aero 34 MPH S 2/2 35/28/32/+6/0.18/0.3/000/00 20 NW 2/3 32/19/26/0/0.05/0.4/574/95 39 W Aero 47 MPH W 2/4 22/10/16/-10/0/0/601/99 39 WSW Aero 40 MPH WSW 2/5 16/5/11/-16/0/0/493/81 61 W Aero 60 MPH W 2/6 24/10/17/-10/0/0/593/97 38 W Aero 36 MPH W 2/7 21/8/15/-12/0/0/474/77 43 W Aero 41 MPH W 2/8 25/11/18/-9/0/0/370/60 48 WSW 2/9 26/15/21/-6/0/0/600/97 44 WSW Aero 42 MPH WSW 2/10 32/13/23/-4/0/0/199/32 28 W 2/11 31/14/23/-4/0/0/456/73 27 SSW 2/12 36/20/28/0/0/0/602/96 43 WSW Aero 40 MPH W 2/13 22/6/14/-14/0.02/0.2/226/36 28 NW 2/14 36/13/25/-3/2.09/1.4/000/00 47 NE Aero 52 MPH NE 2/15 21/9/15/-13/0/0/616/97 46 W Aero 53 MPH W 2/16 27/9/18/-10/0/0/624/98 51 W Aero 49 MPH W 2/17 34/17/26/-3/0/0/596/93 42 W 2/18 33/16/25/-4/0/0/289/45 38 WNW Aero 40 MPH WNW 2/19 20/5/13/-16/0/0/646/100 46 WNW Aero 51 MPH WNW 2/20 48/17/33/+4/T/0/266/41 35 SSW Aero 34 MPH SSW 2/21 44/30/37/+8/0.01/0/606/93 29 W 2/22 39/28/34/+4/0.02/0.2/007/01 22 SSE 2/23 32/14/23/-7/0.10/1.3/466/71 55 WNW Aero 56 MPH WNW 2/24 33/11/22/-8/0/0/652/99 40 WNW Aero 43 MPH WNW 2/25 41/19/30/-1/0/0/617/93 22 WNW 2/26 33/28/31/0/0.31/3.5/000/00 23 NNE 2/27 39/27/33/+2/T/T/147/22 14 SSW 2/28 morning low temp. 28 deg; normal now 23 deg. a trace of snow and precip. since midnight 2/14 - NEW RECORD DAILY PRECIPITATION OF 2.09 INCHES; the previous record was 1.95 inches in 1940. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR FEBRUARY 28 HIGH 62F IN 1976 LOW -2F IN 1907,1934 PRECIP 1.79 INCHES IN 1958 SNOWFALL 8.5 INCHES IN 2005 PEAK GUST 88e MPH SSW IN 1943 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 TODAY'S REPORT By: Robert Skilling