BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, APRIL 29, 2004 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] REPORT AT 2 P.M. S-SSW WINDS GUSTING PAST 40 MPH... Our new Davis Vantage Pro system reports a peak gust to 44 mph from the south early this afternoon. Other recorders have gusts around 43 to 44 mph.... 2ND WETTEST APRIL ON RECORD.... The wettest Aprils are: 1. 1987 10.37 ins 2. 2004 9.38 ins 3. 1929 8.71 ins 4. 1904 8.53 ins TODAY'S OBSERVATIONS.... 4/29/2004 THU 8 a.m. clear with 55 miles visibility and 50 deg; wind south at 20 gusting 30 mph; six hour minimum temperature 42 deg. BHO SA 1155 CLR 55 275/50/26/1917G26/034/ FEW ACSL FRMG VCNTY STN ACC/VIRGA NW-NE MOVD E DSSPTD PST HR LGT HZ PK WND 1926/48/ 8/040 55000 10050 20042 11 a.m. scattered clouds and 63 deg; dewpoint 34; visibility 50 miles; wind ssw at 21 gusting 30 mph BHO SA 1455 70 SCT 50 264/63/34/2118G26/031/ FEW ACSL/ACC/ PTCHS TRAILING SNW VIRGA LGT HZ INCRSNG PK WND 1931/1357/ 8/080 58011 2 p.m. high thin scattered clouds with a view of 50 miles; temp. 70; dewpoint 38; wind ssw at 23 gusting 33 mph; six hour max. temp. 70. BHO SA 1755 300 -SCT 50 242/70/38/2020G29/025/ FEW LWR CI/CC LGT HZ PK WND 1931/06/ 8/001 56022 10070 20050 WEATHER SUMMARY FOR WEDNESDAY, APRIL 28: TIMES ARE LOCAL DAYLIGHT TIME... TEMPERATURE (DEGREES F) MAX.....57 NORMAL.....60 HAZEN....57.0 @ 1:13 P.M. MIN.....41 NORMAL.....41 HAZEN....41.0 @ 6:37 P.M. MEAN....49 NORMAL.....50 DEPARTURE FROM 30-YEAR NORMAL.....-2 TOTAL DEPARTURE FOR THE MONTH....+41 (+1.3 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY.......16 DEPARTURE.....+2 TOTAL HEATING DEGREE DAYS FOR THE MONTH......493 DEPARTURE....-41 TOTAL HEATING DEGREE DAYS FOR THE SEASON....5985 DEPARTURE....-13 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6440 DIFFERENCE..-455 PEAK GUST AND AVERAGE WIND SPEED (MPH) TIME: (EDT) PEAK WIND GUST FOR YESTERDAY........36 WNW AT 3:20 P.M. AEROVANE.........37 WNW AT 3:20 P.M. ASOS.............32 WNW AT 3:20 P.M. FASTEST MILE FOR YESTERDAY..........26 WNW AT 3:41 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......26 WNW AT 3:41 P.M. AVERAGE WIND SPEED AND DIRECTION... 16.0 WNW ASOS............ 15.6 PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT) TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.00 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........9.38 DEPARTURE....+5.32 ASOS..............8.92 TOTAL PRECIPITATION FOR THE YEAR..........17.05 DEPARTURE....-0.34 ASOS.............14.98 SNOWFALL (INCHES) THROUGH THIS MORNING (EDT) TOTAL SNOWFALL FOR 24 HRS ENDING 8 A.M......0.0 DEPARTURE....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.5 DEPARTURE....-2.9 TOTAL SNOWFALL FOR THE SEASON..............58.0 DEPARTURE....+2.2 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/ 0/0/564/72 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/+7/0.28/350/42 38 MPH S 4/28 57/41/49/-2/T/0/560/67 36 MPH WNW Aerovane 37 MPH WNW 4/29 a.m. low temp. 42 deg... * 22ND - trace of precipitation added... 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. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 29 HIGH 85 IN 1974 LOW 26 IN 1909 PRECIP 1.65 IN 1923 SNOWFALL 1.0 INCHES IN 1987 PEAK GUST 54 MPH WSW IN 1981 RECORDS FOR APRIL 30 HIGH 86 IN 1942 LOW 30 IN 1931 PRECIP 1.41 IN 1991 SNOWFALL 0.3 INCHES IN 1909 PEAK GUST 64e MPH NW IN 1978 TODAY'S REPORT BY: Robert Skilling