BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, APRIL 23, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] HEAVY RAIN SHOWERS AND FOG THIS MORNING... WIND IS INCREASING THIS AFTERNOON... THUNDERSTORMS HAVE OCCURRED TODAY TO THE SOUTHWEST... Occasionally heavy rain showers have brought 0.41 of new precipitation this morning, most of this in the hour from 11 A.M. to Noon EST, after 0.03 fell between midnight and 7 A.M. Dense fog has covered the summit most of the day, though the cloud layer has lifted somewhat by early afternoon, with the temperature near 60. The sun has been occasionally very dimly visible through the low clouds, which are advancing on an increasing wind this afternoon. The peak gust so far today has been 43 mph SSE at 1:17 P.M. EST. Today's observations: 7 A.M. EST Weather: Sky obscured with light drizzle and dense fog Temperature: 49F, Dew point: 49F, Wind: ESE 12 mph Sea-level pressure: 29.74 inches, steady Visibility: 1/16 miles BHO SA 1155 W1 X 1/16L-F 071/49/49/1211/974/ PCPN VRY LGT/ 8//// 54000 6003/ 70003 10049 20041 1 P.M. EST Weather: Overcast with stratocumulus and thin fog Temperature: 59F, Dew Point: 58F, Wind: SSE 23G37 mph Visibility: 4 miles, fog Sea-level pressure: 29.67 inches, falling BHO SA 1755 E5 BKN 15 OVC 4F 047/59/58/1620G32/967/ RE20 WND 13V19 PK WND 1633/43 SUN OCLY DMLY VSBL/ 8/5// 56014 6041/ 10059 20049 WEATHER SUMMARY FOR FRIDAY, APRIL 22 TEMPERATURE (DEGREES F) MAX.....61 NORMAL.....58 ASOS.....61 AT 1:59 P.M. MIN.....38 NORMAL.....39 ASOS.....38 AT 5:34 A.M. MEAN....50 NORMAL.....49 DEPARTURE FROM 30-YEAR NORMAL......+1 TOTAL DEPARTURE FOR THE MONTH....+101 (+4.4 DEGREES/DAY) HEATING DEGREE DAY INFORMATION TOTAL HEATING DEGREE DAYS FOR FRIDAY.........15 DEPARTURE.....-1 TOTAL HEATING DEGREE DAYS FOR THE MONTH.....344 DEPARTURE....-99 TOTAL HEATING DEGREE DAYS FOR THE SEASON...5807 DEPARTURE...-100 TOTAL HEATING DEGREE DAYS FOR LAST YEAR....5892 DIFFERENCE...-85 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........33 SSE AT 5:18 P.M. AEROVANE.........35 SSE AT 5:18 P.M. ASOS.............31 S AT 6:09 P.M. DAVIS............34 S AT 4:40 P.M. FASTEST MILE FOR YESTERDAY..........26 SSE AT 4:41 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......25 SSE AT 6:10 P.M. AVERAGE WIND SPEED AND DIRECTION...11.5 SSE ASOS............11.5 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.03 DEPARTURE....-0.11 ASOS..............0.03 TOTAL PRECIPITATION FOR THE MONTH..........2.23 DEPARTURE....-1.01 ASOS..............2.19 TOTAL PRECIPITATION FOR THE YEAR..........18.69 DEPARTURE....+1.97 ASOS.............17.67* *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.....-2.1 TOTAL SNOWFALL FOR THE SEASON.............119.4 DEPARTURE....+59.9 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 ..overnight low 41 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 23 HIGH 85 IN 1908 LOW 25 IN 1933,1989 PRECIP 1.51 IN. IN 1998 SNOWFALL 0.5 IN. IN 1911, 1956 PEAK GUST 64 MPH WNW IN 1962 RECORDS FOR APRIL 24 HIGH 82 IN 2001 LOW 22 IN 1930 PRECIP 2.51 INS IN 1898 SNOWFALL 1.2 INS IN 1967 PEAK GUST 59 MPH NW IN 1962 TODAY'S REPORT BY: Mike Iacono/Matt Douglas