BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, APRIL 24, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] Today's observations: 7 A.M. EST Weather: Obscured with rain and fog Temperature: 53F, Dew point: 53F, Wind: SE at 23 kt Sea-level pressure: 29.41 inches of Hg, falling Visibility: 1/4 of a mile BHO SA COR 1155 W3 X 1/4RF 960/53/53/1323G34/941/ PK WND 1334/53/ 8//// 58006 ASOS 60046 MANUAL 6046/ ASOS 70095 MANUAL 70096 10057 20053 10 A.M. EST Weather: Overcast Temperature: 56F, Dew Point: 56F, Wind: SE at 25 kt Visibility: 5 miles Sea-level pressure: 29.39 inches Hg, falling BHO SA COR 1455 E5 OVC 5L- 953/56/56/1225G40/939/ FEW STRA DFTG OVR SMT VSBY NW-NE 10 VSBY SE-SW 2 PK WND 1140/41/ 58007 ASOS 60010 MANUAL 6011/ WEATHER SUMMARY FOR SATURDAY, APRIL 23 TEMPERATURE (DEGREES F) MAX.....62 NORMAL.....58 ASOS.....62 AT 2:19 P.M. MIN.....41 NORMAL.....39 ASOS.....41 AT 2:53 A.M. MEAN....52 NORMAL.....49 DEPARTURE FROM 30-YEAR NORMAL......+3 TOTAL DEPARTURE FOR THE MONTH....+104 (+4.5 DEGREES/DAY) HEATING DEGREE DAY INFORMATION TOTAL HEATING DEGREE DAYS FOR FRIDAY.........13 DEPARTURE.....-3 TOTAL HEATING DEGREE DAYS FOR THE MONTH.....357 DEPARTURE...-102 TOTAL HEATING DEGREE DAYS FOR THE SEASON...5820 DEPARTURE...-103 TOTAL HEATING DEGREE DAYS FOR LAST YEAR....5892 DIFFERENCE...-85 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........52 S AT 2:13 P.M. AEROVANE.........52 S AT 2:13 P.M. ASOS.............52 S AT 2:21 P.M. FASTEST MILE FOR YESTERDAY..........42 S AT 2:23 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......40 S AT 2:22 P.M. AVERAGE WIND SPEED AND DIRECTION...17.0 SSE ASOS............18.4 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.96 DEPARTURE....+0.82 ASOS..............0.95 TOTAL PRECIPITATION FOR THE MONTH..........3.19 DEPARTURE....-0.19 ASOS..............3.14 TOTAL PRECIPITATION FOR THE YEAR..........19.65 DEPARTURE....+2.79 ASOS.............18.62* *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.....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.2 DEPARTURE.....-2.2 TOTAL SNOWFALL FOR THE SEASON.............119.4 DEPARTURE.....+59.8 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/+5/0.01/0/283/37 23 MPH SE 4/2 56/35/46/+4/1.04/0/000/00 53 MPH SE 4/3 53/39/46/+4/0.63/0/254/33 54 MPH SE Aero 55 MPH SE 4/4 52/37/45/+3/0.01/0/131/17 32 MPH W 4/5 63/35/49/+6/0/0/721/93 32 MPH WNW Aero 35 MPH WNW 4/6 66/43/55/+12/0/0/591/76 25 MPH S 4/7 70/44/57/+14/0.07/0/164/21 46 MPH SSW 4/8 56/43/50/+6/0.25/0/212/27 32 MPH NW 4/9 58/39/49/+5/0/0/786/100 22 MPH NW 4/10 70/39/55/+11/0/0/742/94 38 MPH NNE 4/11 48/36/42/-3/0/0/744/94 32 MPH NNE 4/12 48/28/38/-7/0.03/0.2/413/52 32 MPH NE 4/13 50/28/39/-6/0/0/622/78 22 MPH WNW 4/14 50/36/43/-3/0/0/760/95 23 MPH WNW 4/15 48/34/41/-5/0/0/787/98 35 MPH NE 4/16 55/35/45/-1/0/0/790/98 22 MPH ESE 4/17 74/37/56/+9/0/0/784/97 23 MPH WNW 4/18 70/48/59/+12/0/0/795/98 27 MPH NW Aero 30 MPH WNW 4/19 78/46/62/+15/0/0/.../.. 27 MPH SSW 4/20 86/47/67/+19/0.05/0/458/56 44 MPH NNE 4/21 58/38/48/0/0.11/0/.../.. 37 MPH N 4/22 61/38/50/+1/0/0/.../.. 33 MPH SSE 4/23 62/41/52/+3/.../0/.../.. 52 MPH S DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 24 HIGH 82 IN 2001 LOW 22 IN 1930 PRECIP 2.51 INCHES IN 1898 SNOWFALL 1.2 INCHES IN 1967 PEAK GUST 59 MPH NW IN 1962 RECORDS FOR APRIL 25 HIGH 80 IN 1942 LOW 24 IN 1892 PRECIP 1.38 INCHES IN 1901 SNOWFALL 0.7 INCHES IN 2002 PEAK GUST 66 MPH SE IN 1968 TODAY'S REPORT BY: Andrew Hoell