BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, APRIL 14, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Clear, few stratocumulus Temperature: 39F, Dew point: 29F, Wind: W at 15G23 kts Sea-level pressure: 29.88 inches Hg, rising Visibility: 60 miles 6-hour min. temp: 35F BHO SA 1155 CLR 60 120/39/29/2715G23/988/ SC DSNT SW-NNE AND DSNT OFFSHR ENE-E FEW CUFRA VCNTY STN PK WND 2726/33/ 8/500 53017 10039 20035 10 A.M. Weather: Broken stratocumulus Temperature: 47F, Dew point: 29F, Wind: WNW at 18G26 kts Wind: Peak wind last hour 26 kts WNW at 9:33 A.M. Sea-level pressure: 29.90 inches of Hg, rising Visibility: 70 miles BHO SA 1455 E40 BKN 70 127/47/29/2918G26/990/ PK WND 2926/ 34 WND 26V32/ 8/500 51007 1 P.M. Weather: Overcast stratocumulus, few breaks in overcast Temperature: 48F, Dew point: 27F, Wind: WNW at 13 kts Sea-level pressure: 29.92 inches of Hg, rising Visibility: 75 miles BHO SA 1755 E45 OVC 75 134/48/27/2913/992/ BINOVC ALQDS HIR CLDS VSBL WND 26V32/ 8/501 51007 10050 20039 WEATHER SUMMARY FOR FRIDAY, APRIL 13 TEMPERATURE (DEGREES F) MAX.....47 NORMAL.....54 MIN.....31 NORMAL.....36 MEAN....39 NORMAL.....45 DEPARTURE FROM 30-YEAR NORMAL...........-6 TOTAL DEPARTURE FOR THE MONTH..........-85 (-6.7 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........26 DEPARTURE.........+6 TOTAL HEATING UNITS FOR THE MONTH.........367 DEPARTURE........+85 TOTAL HEATING UNITS FOR THE SEASON.......5361 DEPARTURE.......-385 TOTAL HEATING UNITS LAST SEASON TO DATE..5176 DIFFERENCE......+185 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............41 W AT 3:18 P.M. AEROVANE.............42 W AT 3:18 P.M. ASOS.................39 W AT 3:18 P.M. DAVIS................40 W AT 3:17 P.M. FASTEST MILE FOR YESTERDAY..............30 W AT 3:17 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........29 W AT 3:19 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........32 W AT 3:18 P.M. AVERAGE WIND SPEED AND DIRECTION......16.4 W ASOS..............17.2 DAVIS.............16.8 W [270 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..........2.79 DEPARTURE.....+0.84 ASOS..............2.66 TOTAL PRECIPITATION FOR THE YEAR..........14.53 DEPARTURE.....-1.05 ASOS.............14.30 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......-1.2 TOTAL SNOWFALL FOR THE SEASON..............27.6 DEPARTURE.....-30.7 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/163/21 36 WSW 4/6 39/23/31/-12/0/0/590/76 36 WSW 4/7 40/26/33/-10/0/0/405/52 35 W 4/8 40/25/33/-11/0/0/619/79 44 W Aero 42 MPH W 4/9 50/30/40/-4/0/0/746/95 36 W 4/10 43/30/37/-7/0/0/158/20 28 W 4/11 51/28/40/-5/0/0/.../.. 22 SSE 4/12 39/32/36/-9/0.89/T/000/00 42 E Aero 40 MPH E 4/13 47/31/39/-6/0/0/.../.. 41 W Aero 42 MPH W 4/14 morning low temp. 35 deg; normal low now 36 deg. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 14 HIGH 80 IN 1945 LOW 21 IN 1923 PRECIP 2.22 IN. IN 1895 SNOWFALL 8.4 IN. IN 1953 PEAK GUST 71e MPH W IN 1943 RECORDS FOR APRIL 15 HIGH 81 IN 1896 LOW 23 IN 1943 PRECIP 1.29 IN. IN 1990 SNOWFALL 1.0 IN. IN 1916, 1962 PEAK GUST 59e MPH S IN 1946, 1980 TODAY'S REPORT By: Mike Iacono If you do not wish to receive this Daily Discussion and Climate Summary from the Blue Hill Observatory, please send an email to sitemaster@bluehill.org.