BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, APRIL 8, 2007 EASTER SUNDAY ALL TIMES ARE IN EASTERN STANDARD TIME UNSEASONABLY COLD EARLY APRIL TEMPERATURES CONTINUE PARTLY SUNNY TO MOSTLY CLOUDY, BREEZY AND COLD EASTER SUNDAY APRIL TEMPERATURES AVERAGING MORE THAN 6 DEGREES ON THE COLD SIDE OF NORMAL FIRST WEEK OF APRIL--11 DEGREES COLDER THAN 1ST WEEK OF JANUARY! Moderate cumulus and stratocumulus were forming rapidly this Easter Sunday morning as the strong April sunshine started heating the cold air near the ground. Temperatures are very cold just a few thousand feet above ground level with near to slightly below zero F readings being recorded on Mt. Washington this morning. Amazingly, the first week of April has averaged 11 degrees colder than the first week of January this year. Today's observations: 7 A.M. Weather: High thin scattered cirrus Temperature: 28F, Dew point: 13F, Wind: WSW at 12G21 kts Sea-level pressure: 29.72 inches Hg, rising Visibility: 55 miles 6-hour min. temp: 25F BHO SA 1155 250 –SCT 300 –SCT 55 067/28/13/2512G21/972/ FEW CUFRA FRMG ENE-E AND CU FRMG DSNT W/ 8/100 51015 10028 20025 10 A.M. Weather: Broken stratocumulus clouds Temperature: 34F, Dew point: 12F, Wind: WSW at 18G24 kts Peak wind: 26 kts WSW at 30 mins. past the hour Sea-level pressure: 29.72 inches of Hg, falling Visibility: 60 miles, 45 W-NW BHO SA 1455 E50 BKN 60 064/34/12/2518G24/972/ VIRGA DSNT WSW-N VSBY W-NW 45 PK WND 2426/30/ 8/400 58003 WEATHER SUMMARY FOR SATURDAY, APRIL 7 TEMPERATURE (DEGREES F) MAX.....40 NORMAL.....52 MIN.....26 NORMAL.....34 MEAN....33 NORMAL.....43 DEPARTURE FROM 30-YEAR NORMAL..........-10 TOTAL DEPARTURE FOR THE MONTH..........-43 (-6.3 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........32 DEPARTURE........+10 TOTAL HEATING UNITS FOR THE MONTH.........202 DEPARTURE........+43 TOTAL HEATING UNITS FOR THE SEASON.......5196 DEPARTURE.......-427 TOTAL HEATING UNITS LAST SEASON TO DATE..5081 DIFFERENCE......+115 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............35 W AT 7:43 P.M. AEROVANE............ 34 W AT 7:43 P.M. ASOS.................32 W AT 7:44 P.M. DAVIS................35 W AT 7:42 P.M. FASTEST MILE FOR YESTERDAY..............25 W AT 7:43 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........24 W AT 7:44 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........26 W AT 7:44 P.M. AVERAGE WIND SPEED AND DIRECTION.......8.5 W ASOS.............. 8.8 DAVIS............. 8.4 W [280 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE.....-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.90 DEPARTURE.....+0.85 ASOS..............1.79 TOTAL PRECIPITATION FOR THE YEAR..........13.64 DEPARTURE.....-1.04 ASOS.............13.43 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......-0.6 TOTAL SNOWFALL FOR THE SEASON..............27.6 DEPARTURE.....-30.1 PRELIMINARY CLIMATE SUMMARY FOR APRIL 2007......CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 4/1 59/33/46/+5/0.42/0/511/67 30 S 4/2 39/35/37/-5/0.33/0/000/00 27 E 4/3 41/32/37/-5/0.04/0/000/00 28 ENE 4/4 36/32/34/-8/0.90/0.2/000/00 38 E 4/5 43/26/35/-8/0.21/T/.../.. 36 WSW 4/6 39/23/31/-12/0/0/.../.. 36 WSW 4/7 40/26/33/-10/0/0/.../.. 35 W 4/8 morning low temp. 25 deg; normal low now 35 deg. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 8 HIGH 87 IN 1991 LOW 17 IN 1888 PRECIP 1.78 IN. IN 1956 SNOWFALL 9.3 IN. IN 1956 PEAK GUST 70 MPH S IN 2000 RECORDS FOR APRIL 9 HIGH 83 IN 1991 LOW 18 IN 1888 PRECIP 2.38 IN. IN 1935 SNOWFALL 11.0 IN. IN 1917 PEAK GUST 72 MPH WNW IN 1962 TODAY'S REPORT By: Robert Skilling