BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, APRIL 17, 2004 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] SUNNY AND VERY WARM TODAY... The high temperature so far today of 70 through 1:15 PM EDT is the warmest so far this year. The warm weather is expected to continue through at least Monday. The monthly rainfall of 7.20 inches makes this month already the 7TH WETTEST April on record with two more weeks to go. Almost all of the annual departure has now been erased, with the year now running just about one inch below normal. Today's observations: 8 A.M. EDT Weather: Scattered altocumulus and thin broken cirrus Temperature: 50F, Dewpoint: 17F, Wind: W 12 mph, Sea-level pressure: 30.21 inches, rising BHO SA 1155 80 SCT 100 -SCT 300 -BKN 50 231/50/17/2710/021/ DRK K LYR BLO INVSN N-NE AND SE-S LOOMING BLO INVSN N/ 8/071 53003 10050 20035 METAR KBHO 171155Z 27010KT 50SM FEW080 SCT100 BKN300 10/M08 A3021 RMK SLP231 8/071 T01001083 10100 20017 53003 11 A.M. EDT Weather: Thin scattered cirrus Temperature: 59F, Dew Point: 26F, Wind: SSW 13 mph BHO SA 1455 250 -SCT 40 231/59/26/2111/021/ THN K LYR ALNG HRZN N-NE/ 8/001 55000 METAR KBHO 171455Z 21011KT 40SM FEW250 15/M03 A3021 RMK SLP231 8/001 T01501083 55000 WEATHER SUMMARY FOR FRIDAY, APRIL 16: TEMPERATURE (DEGREES F) MAX.....51 NORMAL.....56 ASOS.....51 AT 3:13 P.M. MIN.....33 NORMAL.....37 ASOS.....33 AT 5:24 A.M. MEAN....42 NORMAL.....46 DEPARTURE FROM 30-YEAR NORMAL.....-4 TOTAL DEPARTURE FOR THE MONTH....-17 (-0.9 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY.......23 DEPARTURE.....+4 TOTAL HEATING DEGREE DAYS FOR THE MONTH......356 DEPARTURE....+17 TOTAL HEATING DEGREE DAYS FOR THE SEASON....5848 DEPARTURE....+45 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6210 DIFFERENCE..-362 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........32 NNW AT 8:17 A.M. AEROVANE.........36 NNW AT 8:17 A.M. ASOS.............31 N AT 8:18 A.M. FASTEST MILE FOR YESTERDAY..........23 NNW AT 8:03 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......24 N AT 8:04 A.M. AVERAGE WIND SPEED AND DIRECTION..13.4 NNW ASOS...........13.0 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE....-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........7.20 DEPARTURE....+4.81 ASOS..............6.78 [CORRECTED] TOTAL PRECIPITATION FOR THE YEAR..........14.87 DEPARTURE....-0.85 ASOS.............13.66 [CORRECTED] SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL FOR 24 HRS ENDING 7 A.M......0.0 DEPARTURE....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.5 DEPARTURE....-1.7 TOTAL SNOWFALL FOR THE SEASON..............58.0 DEPARTURE....+3.4 PRELIMINARY CLIMATE SUMMARY FOR APRIL 2004......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 41/36/39/-2/3.47/0/000/00 44 MPH NE 4/2 37/36/36/-5/0.30/0/000/00 41 MPH NE 4/3 38/35/37/-5/ 0/0/0/000/00 25 MPH NE 4/4 47/35/41/-1/0.22/0/008/01 32 MPH NW 4/5 40/27/34/-9/0.09/0.5/178/23 45 MPH NW Aerovane 46 MPH NW 4/6 49/26/38/-5/ 0/0/747/96 52 MPH WNW Aerovane 56 MPH WNW 4/7 55/32/44/+1/ 0/0/530/68 31 MPH WSW 4/8 58/32/45/+1/ 0/0/.../.. 25 MPH S 4/9 60/39/50/+6/ T/0/.../.. 32 MPH W 4/10 57/34/46/+2/ 0/0/.../.. 40 MPH W 4/11 51/36/44/-1/ 0/0/.../.. 21 MPH W 4/12 47/36/42/-3/0.07/0/.../.. 30 MPH ENE 4/13 59/37/48/+3/2.51/0/000/00 56 MPH S Aerovane 61 MPH S 4/14 59/44/52/+6/0.41/0/000/00 62 MPH S Aerovane 64 MPH S 4/15 52/37/45/-1/0.13/0/.../.. 36 MPH N Aerovane 38 MPH NNW 4/16 51/33/42/-3/ 0/0/.../.. 32 MPH NNW 4/17 overnight low 35... DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 17 HIGH 93 IN 2003 LOW 21 IN 1908 PRECIP 1.68 IN 1954 SNOWFALL 1.0 INCHES IN 1899 PEAK GUST 58 MPH NW IN 1994 RECORDS FOR APRIL 18 HIGH 92 IN 1976 LOW 23 1887 PRECIP 1.48 IN 1954 SNOWFALL 3.7 INCHES IN 1965 PEAK GUST 59 MPH S IN 1982 TODAY'S REPORT BY: Mike Iacono