BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, FEBRUARY 21, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] Today's observations: 7 A.M. Weather: Obscured sky with snow Temperature: 22F, Dew point: 21F, Wind: E at 9 kt Sea-level pressure: 30.25 inches Hg, falling Visibility: 1/4 of a mile BHO SA 1155 W2 X1 1/4S 243/22/21/0809/025/ TOTAL NEW SNW PST 24 HR 2.0 IN/ 8//// 4/002 58013 6017/ 70017 10024 20021 10 A.M. Weather: Obscured with snow Temperature: 25F, Dew Point: 24F, Wind: E at 15 kt Visibility: 1/2 of a mile Sea-level pressure: 30.19 inches of Hg, falling BHO SA 1455 W2 X1 1/2S 224/25/24/0815G22/019/ TOTAL NEW SNW PST 3 HR 1.0 IN VSBY 1/4V2/ 8//// 58019 ASOS 60009 1 P.M. Weather: Obscured with snow Temperature: 28F, Dew Point: 27F, Wind: ENE at 15 kt Visibility: 1/2 of a mile BHO SA 1755 W2 X1 1/2S- 211/28/27/0715G20/015/ TOTAL NEW SNW PST 6 HR 1.6 IN/ 8//// 56032 6014/ 10028 20022 WEATHER SUMMARY FOR SUNDAY, FEBRUARY 20: TEMPERATURE (DEGREES F) MAX.....30 NORMAL.....37 ASOS.....29F AT 3:27 A.M. MIN.....17 NORMAL.....21 ASOS.....17F AT 7:24 A.M. MEAN....24 NORMAL.....29 DEPARTURE FROM 30-YEAR NORMAL......-5 TOTAL DEPARTURE FOR THE MONTH.....+99 (+5.0 DEGREES/DAY) HEATING DEGREE DAY INFORMATION TOTAL HEATING DEGREE DAYS FOR FRIDAY.........41 DEPARTURE.....+5 TOTAL HEATING DEGREE DAYS FOR THE MONTH.....552 DEPARTURE....-99 TOTAL HEATING DEGREE DAYS FOR THE SEASON...4132 DEPARTURE...-159 TOTAL HEATING DEGREE DAYS FOR LAST YEAR....4278 DIFFERENCE..-234 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........28 W AT 11:45 A.M. AEROVANE.........29 W AT 11:47 A.M. ASOS.............25 W AT 11:53 A.M. FASTEST MILE FOR YESTERDAY..........21 W AT 1:05 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......22 W AT 1:04 P.M. AVERAGE WIND SPEED AND DIRECTION..11.3 W ASOS...........11.8 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...TRACE DEPARTURE....-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.15 DEPARTURE....-0.44 ASOS..............2.09 TOTAL PRECIPITATION FOR THE YEAR...........8.39 DEPARTURE....+1.02 ASOS..............7.92* *EXCLUDES 3.19 INCHES OF ERRONEOUS PRECIPITATION RECORDED FROM 1/23-1/28. SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........2.0 DEPARTURE.....+1.5 TOTAL SNOWFALL FOR THE MONTH................6.0 DEPARTURE.....-6.0 TOTAL SNOWFALL FOR THE SEASON..............74.8 DEPARTURE....+32.4 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2005......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 2/1 38/18/28/+2/0/0/600/100 13 MPH NNW 2/2 35/20/28/+2/0/0/549/91 23 MPH N 2/3 36/20/28/+2/0.28/0.2/012/02 27 MPH NNE 2/4 33/30/32/+6/0.02/0.1/000/00 33 MPH N 2/5 49/30/40/+13/0/0/605/99 30 MPH N 2/6 41/30/36/+9/0/0/613/100 31 MPH N 2/7 50/29/40/+13/0/0/400/65 22 MPH S 2/8 47/36/42/+15/0/0/012/02 24 MPH SSW 2/9 50/36/43/+16/0.01/0/099/16 25 MPH W 2/10 38/30/34/+7/0.97/2.9/000/00 32 MPH NNW 2/11 30/21/26/-1/0.05/0.5/451/72 44 MPH WNW Aero 51 MPH WNW 2/12 36/24/30/+2/0/0/182/29 36 MPH W 2/13 37/21/29/+1/0/0/429/68 27 MPH WNW 2/14 38/19/29/+1/0.06/0.1/323/51 38 MPH SE 2/15 48/36/42/+14/0.58/0/293/46 52 MPH SE Aero 53 MPH SE 2/16 52/33/43/+15/0.17/0/160/25 42 MPH S Aero 43 MPH S 2/17 38/26/32/+3/0/0/.../.. 30 MPH W Aero 30 MPH W 2/18 33/14/24/-5/0.01/0.2/.../.. 37 MPH W Aero 38 MPH W 2/19 26/9/18/-11/0/0/.../.. 31 MPH WNW 2/20 30/17/24/0/0/.../.. 28 MPH W DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): There are no new daily extremes established for this month to date.... RECORDS FOR FEBRUARY 21 HIGH 62F IN 1930 LOW -6F IN 1950 PRECIP 2.42 INCHES IN 1898 SNOWFALL 9.0 INCHES IN 1929 PEAK GUST 72 MPH WNW IN 1967 RECORDS FOR FEBRUARY 22 HIGH 63F IN 1997 LOW -1F IN 1918 PRECIP 1.38 INCHES IN 1900 SNOWFALL 8.0 INCHES IN 1893 PEAK GUST 74 MPH S IN 1974 TODAY'S REPORT BY: Andrew Hoell