BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, APRIL 16, 2012 PATRIOTS DAY/MARATHON DAY ALL TIMES ARE IN EASTERN STANDARD TIME MID-SUMMER LIKE HEAT IS ON! NEW DAILY HIGH TEMPERATURE RECORD SET FOR APRIL 16.... LOW TEMPERATURE WILL LIKELY SET NEW DAILY HIGH MINIMUM The maximum temperature equaled the record of 87F shortly after noon today which was set way back in 1896 and surpassed it reaching 89F a short time later. The early morning low of 60F has surpassed the record high minimum for this date of 59F in 1976. The precipitation departure for the year has now surpassed 10 inches and for the month it has passed the two inch mark in below normal rainfall. A severe short-term drought continues in progress. See U.S. Drought Monitor. Today's observations: 7 A.M. Weather: Clear, few cirrus Temperature: 65F, Dew point: 56F, Wind: S at 8 kts, Sea-level pressure: 30.02 inches Hg, rising Visibility: 15 miles, thin fog is disappating 24-hour precip: 0.01 6-hour min. temp: 60F BHO SA 1155 CLR 15 165/65/56/1708/002/ FEW CI THN F DSSPTNG PST HR HAZY/ 8/001 52008 MANUAL 70001 ASOS 70001 10065 20060 10 A.M. Weather: Clear, few cirrus Temperature: 79F, Dew Point: 57F; Wind: SSW at 6 kts, Sea-level pressure: 30.01 inches Hg, falling slightly Visibility: 20 miles, hazy BHO SA 1455 CLR 20 164/79/57/2006/001/ FEW CI HAZY/ 8/001 56001 1 P.M. Weather: Scattered dense cirrus, scattered cirrus, small cumulus fractus, cumulus forming overhead through SW-NW-ENE, dense cirrus overhead through SW-W, few thin cirrus 2 different levels all quadrants Temperature: 87F, Dew Point: 53F; Wind: S at 12G17 kts, Wind: Direction variable SSE-SW Sea-level pressure: 29.96 inches Hg, falling Visibility: 25 miles, hazy 6-hour max. temp: 89F BHO SA 1755 220 SCT 250 SCT 300 SCT 25 147/87/53/1912G17/996/ FEW CUFRA/SML CU FRMG OVHD-SW-NW-ENE PTCHS DNS CI SW-W VCTY OF STN HAZY WND 15V22/ 8/102 58017 10089 20065 WEATHER SUMMARY FOR SUNDAY, APRIL 15 TEMPERATURE (DEGREES F) MAX.....75 NORMAL.....56 MIN.....42 NORMAL.....38 MEAN....64 NORMAL.....47 DEPARTURE FROM 30-YEAR NORMAL......................+17 TOTAL DEPARTURE FOR THE MONTH......................+60 [+3.8 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY...............1 DEPARTURE.........-18 TOTAL HEATING UNITS FOR THE MONTH.............258 DEPARTURE.........-62 TOTAL HEATING UNITS FOR THE SEASON...........4543 DEPARTURE.......-1241 TOTAL HEATING UNITS LAST SEASON TO DATE......5696 DIFFERENCE......-1153 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............23 W AT 2:53 P.M. * AERO..................23 W AT 7:47 P.M. * ASOS..................24 W AT 2:53 P.M. DAVIS.................23 W AT 2:53 P.M. THE FASTEST MILE FOR YESTERDAY...........18 WSW AT 2:39 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............18 W AT 4:28 P.M. DAVIS MAXIMUM 2-MINUTE AVERAGE...........18 WSW AT 4:28 P.M. AVERAGE WIND SPEED AND DIRECTION.......11.5 WNW ASOS................11.1 DAVIS...............10.6 SW [220 deg.] * last of several occurrences... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01 DEPARTURE..........-0.14 ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH..........0.35 DEPARTURE..........-2.16 ASOS..............0.32 TOTAL PRECIPITATION FOR THE YEAR...........6.44 DEPARTURE.........-10.07 ASOS..............6.47 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE..........-0.1 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE..........-1.6 TOTAL SNOWFALL FOR THE SEASON..............24.2 DEPARTURE.........-34.3 PRELIMINARY CLIMATE SUMMARY FOR APRIL 2012 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant RMY: RMY = R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 4/1 50/34/42/+1/0.14/0.0/360/47 20 SSW AERO 20 MPH SSW RMY N/A 4/2 51/35/43/+2/0.04/T/353/46 35 NNW AERO 33 MPH NNW RMY 35 4/3 57/31/44/+2/0.00/0.0/724/94 36 NW AERO 37 MPH NW RMY 40 4/4 62/38/50/+8/T/0.0/688/89 40 NW AERO 39 MPH NW RMY 43 4/5 51/33/42/-1/0.00/0.0/660/85 29 NW AERO 27 MPH NW RMY 30 4/6 51/31/41/-2/0.00/0.0/623/80 26 NNW AERO 26 MPH NNW RMY 28 4/7 54/32/43/0/0.00/0.0/305/39 31 NW AERO 32 MPH NW RMY 32 4/8 51/37/44/0/0.00/0.0/086/11 32 NW AERO 31 MPH NW RMY 33 4/9 57/43/50/+6/T/0.0/323/41 44 W AERO 42 MPH W RMY 44 4/10 61/40/51/+6/0.00/0.0/600/76 32 W AERO 31 MPH W RMY 34 4/11 57/40/49/+4/0.00/0.0/397/50 21 NE AERO 20 MPH NE RMY 22 4/12 54/39/47/+2/0.16/0.0/.../.. 25 NNW AERO 24 MPH NNW RMY 28 4/13 63/36/50/+4/0.00/0.0/.../.. 24 W AERO 23 MPH W RMY 25 4/14 70/44/57/+11/0.00/0.0/.../.. 25 SSW AERO 27 MPH SSW RMY 28 4/15 75/52/64/+17/T/0.0/.../.. 23 W AERO 23 MPH W RMY 25 morning low temp: 60F; the normal low is now 38F DAILY RECORDS FOR APRIL 2012 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR APRIL 16 HIGH 87 IN 1896 LOW 23 IN 1943 PRECIP 2.45 IN. IN 1929 SNOWFALL 2.0 IN. IN 1904, 1962 PEAK GUST 73 MPH E IN 2007 RECORDS FOR APRIL 17 HIGH 93 IN 2002 LOW 21 IN 1908 PRECIP 1.68 IN 1954 SNOWFALL 1.0 IN. IN 1899 PEAK GUST 63 MPH ESE IN 2011 TODAY'S REPORT PREPARED BY: Robert Skilling/Patrick Peters