BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, APRIL 14, 2004 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] DISCUSSION...... A new record daily rainfall for April 13 was established yesterday with 2.51 inches of rainfall; the old record was 1.95 inches. Light drizzle and some light rain continues today with the amounts have been small with about 0.1 inch through early afternoon. Strong to gale force south winds have steadily diminished after gusting over 60 MPH during the early morning hours. The Aerovane wind system got three gusts to 64 MPH. TODAY'S OBSERVATIONS.... 8 a.m. obscurement at 100 ft; visibility 1/16 mile in dense fog; temp 54; wind south at 24 hour rainfall 2.20 inches... 4/14/2004 WED BHO SA COR 1155 W1 X 1/16F 073/53/53/1916G25/975/ PK WND 1929/1058/ 8//// 53021 ASOS 60002 MANUAL 6002/ MANUAL 70220 ASOS 70208 10059 20053 11 a.m. low overcast with 6 miles view in light rain and fog; temp 53; wind southwest at 16 mph....three hour rainfall 0.04 inch BHO SA 1455 E8 BKN 40 OVC 6R-F 077/53/52/2214/976/ VSBY SE-S 4 NW 15 RB UKN/ 8/72/ 53004 ASOS 60003 MANUAL 6004/ 2 p.m. low overcast with 3 miles in light rain and fog; temp. 55; dewpoint 54; wind wnw at 02 mph; six hour rainfall 0.12 inch... BHO SA 1755 E3 OVC 3R-F 060/55/54/E2901/971/ CIG RGD STRA DRFTG BLO SMT/ 8/7// 56017 ASOS 60012 MANUAL 6012/ 10055 20052 WEATHER SUMMARY FOR TUESDAY, APRIL 13: TEMPERATURE (DEGREES F) MAX.....59 NORMAL.....54 ASOS.....58.8 AT 10:58 P.M. MIN.....37 NORMAL.....36 ASOS.....37.1 AT 7:29 A.M. MEAN....48 NORMAL.....45 DEPARTURE FROM 30-YEAR NORMAL.....+3 TOTAL DEPARTURE FOR THE MONTH....-18 (-1.6 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY.......17 DEPARTURE.....-3 TOTAL HEATING DEGREE DAYS FOR THE MONTH......300 DEPARTURE....+18 TOTAL HEATING DEGREE DAYS FOR THE SEASON....5792 DEPARTURE....+46 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6185 DIFFERENCE..-393 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........56 S AT 11:53 P.M. ** AEROVANE.........61 S AT 11:29 P.M. ** ASOS.............53 S AT 11:53 P.M. ** FASTEST MILE FOR YESTERDAY..........N/A MAXIMUM 2-MINUTE ASOS AVERAGE.......41 S AT 11:47 P.M. AVERAGE WIND SPEED AND DIRECTION....19.2 ENE ASOS.......... 18.6 ** eastern standard time PRECIPITATION (INCHES) THROUGH THIS MORNING TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....2.20 ASOS..............2.08 TOTAL PRECIPITATION FOR THE MONTH..........6.68 DEPARTURE....+4.73 ASOS..............6.28 TOTAL PRECIPITATION FOR THE YEAR..........14.35 DEPARTURE....-0.93 ASOS.............13.16 SNOWFALL (INCHES) THROUGH THIS MORNING TOTAL SNOWFALL FOR 24 HRS ENDING 8 A.M......0.0 DEPARTURE....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.5 DEPARTURE....-1.4 TOTAL SNOWFALL FOR THE SEASON..............58.0 DEPARTURE....+3.7 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/ 2 p.m. rainfall 0.14 for day 62 MPH S Aerovane 64 MPH S THE NEW APRIL RECORDS.... There are FOUR NEW APRIL RECORDS which have been established thus far this month. April 13 - Rainfall 2.51 inches for calendar day; previous record 1.95 inches in 1933. April 1 - Rainfall 3.47 inches for calendar day; previous record was 2.28 inches in 1962. April record - New greatest daily rainfall 3.47 inches for any date during April occurred on April 1; previous record 3.18 inches on April 21, 1991. April record - New greatest rainfall in "any" twenty-four hour period during April of 3.47 inches occurred on April 1. The previous record was 3.19 inches on April 20-21, 1991. THE DAILY APRIL RECORDS.... RECORDS FOR APRIL 14 HIGH 80 IN 1945 LOW 21 IN 1923 PRECIP 2.22 INCHES IN 1895 SNOWFALL 8.4 INCHES IN 1953 PEAK GUST 71e MPH W IN 1943 RECORDS FOR APRIL 15 HIGH 81 IN 1896 LOW 23 IN 1943 PRECIP 1.29 INCHES IN 1990 SNOWFALL 1.0 INCHES IN 1916, 1962 PEAK GUST 59e MPH S IN 1946, 1980 TODAY'S REPORT BY: Robert Skilling