BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, APRIL 3, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] Today's observations: 7 A.M. Weather: Overcast with breaks Temperature: 46F, Dew point: 45F, Wind: SSE at 20 kt Sea-level pressure: 29.42 inches Hg, rising Visibility: 10 miles 24-hour precipitation: 1.48 inches BHO SA 1155 20 BKN 50 OVC 10 963/46/45/1520G28/942/ BINOVC OVHD STN 1431/37/ 8/4// 53015 ASOS 60055 MANUAL 70148 ASOS 70149 10053 20046 10 A.M. Weather: Broken stratocumulus Temperature: 52F, Dew Point: 39F, Wind: SE at 25 kt Visibility: 20 miles Sea-level pressure: 29.43 inches Hg, steady BHO SA 1455 20 BKN 150 BKN 20 967/52/39/1625G32/943/ PK WND 1732/50 WND BACKING/ 8/570 55004 WEATHER SUMMARY FOR SATURDAY, APRIL 2: TEMPERATURE (DEGREES F) MAX.....56 NORMAL.....50 ASOS.....55 AT 10:37 P.M. MIN.....35 NORMAL.....33 ASOS.....35 AT 7:16 A.M. MEAN....46 NORMAL.....42 DEPARTURE FROM 30-YEAR NORMAL......+4 TOTAL DEPARTURE FOR THE MONTH......+9 (+4.3 DEGREES/DAY) HEATING DEGREE DAY INFORMATION TOTAL HEATING DEGREE DAYS FOR FRIDAY.........19 DEPARTURE.....-5 TOTAL HEATING DEGREE DAYS FOR THE MONTH......19 DEPARTURE....-10 TOTAL HEATING DEGREE DAYS FOR THE SEASON...5511 DEPARTURE....-45 TOTAL HEATING DEGREE DAYS FOR LAST YEAR....5518 DIFFERENCE...-37 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........53 SE AT 10:21 P.M. AEROVANE.........53 SE AT 10:20 P.M. ASOS.............52 SE AT 10:22 P.M. FASTEST MILE FOR YESTERDAY..........35 SE AT 10:23 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......33 SSE AT 10:23 P.M. AVERAGE WIND SPEED AND DIRECTION..17.4 NE ASOS...........16.4 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....1.48 DEPARTURE....+1.33 ASOS..............1.49 TOTAL PRECIPITATION FOR THE MONTH..........1.68 DEPARTURE....+1.23 ASOS..............1.69 TOTAL PRECIPITATION FOR THE YEAR..........18.14 DEPARTURE....+4.21 ASOS.............17.17* *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..........0.0 DEPARTURE.....-0.2 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE.....-0.6 TOTAL SNOWFALL FOR THE SEASON.............119.2* DEPARTURE....+61.7 * THIRD GREATEST SEASONAL SNOW TOTAL ON RECORD. PRELIMINARY CLIMATE SUMMARY FOR APRIL 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 4/1 56/36/46/+5/0.01/0/.../.. 23 MPH SE 4/2 56/35/46/+4/.../0/.../.. 53 MPH SE PRELIMINARY CLIMATE SUMMARY FOR MARCH 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 3/1 29/23/26/-6/0.53/3.6/000/00 52 MPH NNE Aero 52 MPH NNE 3/2 33/20/27/-5/T/T/264/39 42 MPH W Aero 45 MPH W 3/3 28/15/22/-10/0/0/640/94 43 MPH W Aero 43 MPH W 3/4 31/12/22/-11/0/0/561/82 40 MPH W Aero 44 MPH W 3/5 39/18/29/-4/0/0/679/99 29 MPH W 3/6 40/24/32/-1/0/0/345/50 42 MPH SSW Aero 44 MPH SSW 3/7 47/33/40/+7/0/0/201/29 45 MPH S Aero 50 MPH SSE 3/8 42/12/27/-7/1.20/5.7/000/00 63 MPH WNW Aero 66 MPH WNW 3/9 21/06/14/-20/0.02/0.3/663/95 54 MPH W Aero 58 MPH W 3/10 29/11/20/-14/0/0/673/96 29 MPH WSW 3/11 32/18/26/-10/0.07/1.0/134/19 29 MPH E 3/12 34/28/31/-4/1.19/8.9/000/00 27 MPH NE 3/13 37/25/31/-4/0.01/0.1/291/41 25 MPH W 3/14 39/21/30/-6/0/0/669/94 31 MPH WNW 3/15 44/24/34/-2/0/0/512/72 30 MPH WNW 3/16 43/26/35/-1/0/0/675/94 29 MPH W 3/17 43/23/33/-4/0/0/606/84 25 MPH WNW 3/18 43/29/36/-1/0/0/506/70 27 MPH WNW 3/19 45/25/35/-2/0/0/697/96 28 MPH WNW Aero 31 MPH WNW 3/20 48/28/38/0/T/0/365/50 27 MPH SSW 3/21 41/33/37/-1/0/0/007/01 21 MPH NNE 3/22 52/29/41/+3/0/0/720/98 29 MPH W 3/23 42/30/36/-2/0.12/1.0/022/03 36 MPH ENE 3/24 37/31/34/-5/0.47/4.4/022/03 40 MPH N Aero 41 MPH NNE 3/25 47/30/39/0/0/0/461/62 30 MPH W 3/26 40/26/33/-6/0/0/709/95 22 MPH 3/27 52/28/40/0/0/0/705/94 24 MPH SSW 3/28 42/32/37/-3/2.15/0/000/00 27 MPH N *** 3/29 47/38/43/+3/0.36/0/000/00 38 MPH NNW 3/30 52/34/43/+2/0/0/682/90 33 MPH N 3/31 48/35/42/+1/0/0/632/83 25 MPH NE DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 3 HIGH 76 IN 1892 LOW 16 IN 1894 PRECIP 2.18 INCHES IN 1990 SNOWFALL 8.0 INCHES IN 1915 PEAK GUST 83e MPH NW IN 1977 [RECORD FOR MONTH] RECORDS FOR APRIL 4 HIGH 71 IN 1950 LOW 12 IN 1954 PRECIP 1.45 INCHES IN 1987 SNOWFALL 3.7 INCHES IN 1975 PEAK GUST 80 MPH WNW IN 1963 [RECORD FOR MONTH] TODAY'S REPORT BY: Andrew Hoell