BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, MAY 3, 2004 ALL TIMES ARE EASTERN DAYLIGHT TIME [unless otherwise noted] APRIL 2004... 2ND WETTEST ON RECORD WITH 9.38 INCHES The wettest Aprils are: 1. 1987 10.37 ins 2. 2004 9.38 ins 3. 1929 8.71 ins 4. 1904 8.53 ins Temperatures averaged 1.7 degrees milder than normal for the month. There are FOUR NEW APRIL RECORDS.... 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. April 13 - Rainfall 2.51 inches for calendar day; previous record 1.95 inches in 1933. TODAY'S OBS... 5/3/2004 MON 8 a.m. obscurement with 1/16 visibility in heavy fog; temp and dewpoint 58; wind south at 18 mph; six hour min. temp. 57; 24 hour precipitation 0.06 inch.. BHO SA 1155 W2 X 1/16F 115/58/58/1716/987/ 8//// 51010 70006 ASOS 70006 10058 20057 11 a.m. low overcast with 6 miles visibility in light fog; temp 60; wind ssw at 07 mph.... BHO SA 1455 E4 OVC 6F 124/60/59/2006/990/ VSBY SE 5 SW 8 N 9/6// 51009 2 p.m. obscurement with 1/16 mile visibility in light rain showers and dense fog; temp/dewpoint 59; wind ssw at 05 mph; six hourly precipitation 0.03 inch; six hourly maximum temp. 60 deg. BHO SA 1755 W2 X 1/16RW-F 117/59/59/2004/988/RBUKN VSBY LWRD PST HR/ 8//// 58007 ASOS 60003 MANUAL 6003/ 10060 20057 WEATHER SUMMARY FOR SUNDAY, MAY 2: TIMES ARE LOCAL DAYLIGHT TIME... TEMPERATURE (DEGREES F) MAX.....72 NORMAL.....62 HAZEN...72.0 @ 12:53 P.M. MIN.....56 NORMAL.....43 HAZEN...56.3 @ 3:57 A.M. MEAN....64 NORMAL.....52 DEPARTURE FROM 30-YEAR NORMAL.....+12 TOTAL DEPARTURE FOR THE MONTH.....+24 (11.8 DEGREES/DAY) HEATING DEGREE DAYS - COOLING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY........1 DEPARTURE....-12 TOTAL HEATING DEGREE DAYS FOR THE MONTH...... 2 DEPARTURE....-24 TOTAL HEATING DEGREE DAYS FOR APRIL..........501 DEPARTURE....-61 TOTAL COOLING DEGREE DAYS FOR APRIL............1 DEPARTURE....- 2 TOTAL HEATING DEGREE DAYS FOR THE SEASON....5995 DEPARTURE....-57 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6471 DIFFERENCE..-476 PEAK GUST AND AVERAGE WIND SPEED (MPH) TIME: EDT PEAK WIND GUST FOR YESTERDAY........45 S AT 4:28 P.M. AEROVANE.........49 S AT 4:28 P.M. ASOS.............47 S AT 4:28 P.M. FASTEST MILE FOR YESTERDAY..........N/A MAXIMUM 2-MINUTE ASOS AVERAGE.......36 S AT 4:30 P.M. AVERAGE WIND SPEED AND DIRECTION... 20.0 SSW ASOS............ 19.5 PRECIPITATION (INCHES) THROUGH THIS MORNING TIME: EDT TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.06 ASOS..............0.06 TOTAL PRECIPITATION FOR THE MONTH..........0.06 DEPARTURE....-0.20 ASOS..............0.06 TOTAL PRECIPITATION FOR THE YEAR..........17.41 ** DEPARTURE....-0.80 ** ASOS.............15.04 ** both the total for the year and departure for the year have been in error during the entire month of April due to a tabulation error... Both of these errors have now been corrected as of today.... TOTAL SNOWFALL FOR THE SEASON..............58.0 DEPARTURE....+1.9 PRELIMINARY CLIMATE SUMMARY FOR APRIL 2004 and MAY 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/ 0/0/564/72 25 MPH S 4/9 60/39/50/+6/ T/0/550/70 32 MPH W 4/10 57/34/46/+2/ 0/0/718/91 40 MPH W 4/11 51/36/44/-1/ 0/0/063/08 21 MPH W 4/12 47/36/42/-3/0.07/0/341/43 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/-1/0.13/0/297/37 36 MPH N Aerovane 38 MPH NNW 4/16 51/33/42/-3/ 0/0/605/75 32 MPH NNW 4/17 74/34/55/+8/ 0/0/501/62 29 MPH S 4/18 63/46/55/+8/ 0/0/608/75 32 MPH SE 4/19 83/44/64/+17/ 0/0/447/55 43 MPH SSW 4/20 67/44/56/+8/ 0/0/326/40 45 MPH W Aerovane 46 MPH W 4/21 62/42/52/+4/ 0/0/450/55 28 MPH SSE 4/22 79/48/64/+15/ T/0/402/49 35 MPH S 4/23 62/39/51/+2/0.88/0/000/00 35 MPH NE 4/24 64/37/51/+2/0.04/0/637/77 46 MPH WNW 4/25 52/34/44/-6/0.04/0/497/60 31 MPH NW 4/26 52/37/45/-5/0.94/0/000/00 28 MPH SSE 4/27 67/47/57/+7/0.28/0/350/42 38 MPH S 4/28 57/41/49/-2/ T/0/560/67 36 MPH WNW Aerovane 37 MPH WNW 4/29 72/42/57/+6/ 0/0/771/92 43 MPH SSW Aerovane 44 MPH SSW 4/30 81/51/66/+14/ 0/0/563/67 32 MPH SSW DAILY SNOWFALL REPORTS DISCONTINUED AT THE END OF APRIL 5/1 78/50/64/+12/ 0/.../.. 39 MPH SSW ** 5/2 72/56/64/+12/0.06/.../.. 45 MPH S Aerovane 49 MPH S 5/3 morning low temp. 57 deg. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 3 HIGH 92F IN 2001 LOW 31F IN 1888 PRECIP 2.25 INCHES IN 1900 SNOWFALL TRACE IN 1908 & 1985 PEAK GUST 71 MPH W IN 2002 RECORDS FOR MAY 4 HIGH 90F IN 2001 LOW 27F IN 1911 (RECORD FOR MAY) PRECIP 1.92 INCHES IN 1893 SNOWFALL 0.1 INCHES IN 1920 PEAK GUST 60 MPH NW IN 1966 TODAY'S REPORT BY: Robert Skilling