BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, APRIL 14, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME CLOUDS FOLLOW MORNING SUNSHINE, TEMPS STUCK IN THE MID-HIGH 40S An overnight low of only 41F set up today to get back on track temperature-wise. Early morning sun quickly bumped us into the upper 40s but as the banks of cumulus and stratocumulus rolled in temperatures stagnated before finally reaching 50F around 1:00 PM. A fairly steady 10 MPH west wind has been present most of the day, rarely gusting to ~25 MPH. Today's observations: 7 A.M. Weather: Sunny through broken cumulus/cumulus fractus, few cirrocumulus and cirrostratus distant WNW-NNW and NE Temperature: 44F; Dew Point: 36F; Wind: WNW at 8 kts, Sea-level pressure: 29.99 ins. Hg, steady then rising Visibility: 70 miles, light distant haze 24-hr precip: Trace 6-hour max. temp: 44 6-hour min. temp: 41 BHO SA 1155 E60 BKN 70 155/44/36/3008/999/ FEW CC WSW AND NE FEW CS WNW-NNW LT DSNT HZ ALQDS/ 8/057 53012 10044 20041 10 A.M. Weather: Broken altocumulus and stratocumulus with virga distant WNW-NNW and distant NE Temperature: 47F; Dew Point: 31F; Wind: WNW at 12 kts, Sea-level pressure: 30.01 ins. Hg, steady then rising Visibility: 70 miles, light distant haze BHO SA 1455 E40 BKN 60 BKN 70 162/47/31/3012/001/ VRGA DSNT WNW-NNW AND DSNT NE LT DSNT HZ/ 8/08/ 53007 1 P.M. Weather: Few breaks in overcast, light rain distant NW, virga distant SE Temperature: 50F; Dew Point: 26F; Wind: WNW at 12 kts, Sea-level pressure: 30.01 ins. Hg, rising then steady Visibility: 70 miles, light distant haze 6-hour max temp: 50 F 6-hour min temp: 44 F BHO SA 1755 E50 BKN 60 OVC 70 163/50/26/2912/001/ FEW BINOVC RW- DSNT NW VRGA DSNT SE LT DSNT HZ/ 8/08/ 51001 10050 20044 WEATHER SUMMARY FOR SATURDAY, APRIL 13 TEMPERATURE (DEGREES F) MAX.....52 NORMAL.....55 MIN.....34 NORMAL.....37 MEAN....43 NORMAL.....46 DEPARTURE FROM 30-YEAR NORMAL....................-3 TOTAL DEPARTURE FOR THE MONTH...................+13 [+1.0 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............22 DEPARTURE..........+3 TOTAL HEATING UNITS FOR THE MONTH...........268 DEPARTURE.........-13 TOTAL HEATING UNITS FOR THE SEASON.........5288 DEPARTURE........-477 TOTAL HEATING UNITS LAST SEASON TO DATE....4534 DIFFERENCE.......+754 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...............31 NNE AT 3:20 A.M. AERO....................27 NNE AT 3:08 A.M. ASOS....................31 NE AT 2:43 A.M. DAVIS...................29 NNE AT 2:42 A.M. RMY: N/A THE FASTEST MILE FOR YESTERDAY.............21 NNE AT 3:10 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..............21 NNE AT 2:43 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.............20 NNE AT 2:42 A.M. AVERAGE WIND SPEED AND DIRECTION..........9.0 NNW ASOS...................8.5 DAVIS..................8.2 NNW [346 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE...........-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.18 DEPARTURE...........-1.02 ASOS..............1.13 TOTAL PRECIPITATION FOR THE YEAR..........15.27 DEPARTURE...........-0.93 ASOS..............N/A* *ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M...........0 DEPARTURE............-0.1 TOTAL SNOWFALL FOR THE MONTH.............Trace DEPARTURE............-2.0 TOTAL SNOWFALL FOR THE SEASON.............99.0 DEPARTURE...........+37.3 PRELIMINARY CLIMATE SUMMARY FOR APRIL 2013 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust 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 61/31/46/+5/0.34/0.0/458/60 40 W AERO 44 MPH WNW RMY 46 TSTM 4/2 40/27/34/-7/T/T/460/60 45 W AERO 42 MPH W RMY 47 4/3 45/27/36/-6/0.00/0.0/755/98 44 W AERO 43 MPH W RMY 47 4/4 55/26/41/-1/0.00/0.0/719/93 30 WSW AERO 27 MPH WSW RMY 31 4/5 59/36/48/+5/0.00/0.0/403/52 33 NNW AERO 28 MPH NNW RMY 38 4/6 47/30/39/-4/0.00/0.0/747/96 38 NW AERO 35 MPH NW RMY 40 4/7 52/31/42/-1/0.00/0.0/.../.. 51 S AERO 46 MPH S RMY 50 4/8 65/43/54/+10/T/0.0/.../.. 29 SSW AERO 22 MPH SSW RMY N/A 4/9 72/44/58/+14/T/0.0/.../.. 35 WNW AERO 35 MPH WNW RMY 39 TSTM 4/10 64/43/54/+9/0.13/0.0/.../.. 23 SE AERO 20 MPH SE RMY 25 4/11 52/40/46/+1/..../0.0/.../.. 18 ENE AERO 14 MPH ENE RMY N/A 4/12 40/34/37/-8/..../T/.../.. 38 E AERO 32 MPH E RMY 41 4/13 52/34/43/-3/0.00/0/.../.. 31 NNE AERO 27 MPH NNE RMY 21 4/14 the morning low temp: 41F; the normal low is now 37F DAILY RECORDS FOR APRIL 2013 None so far. 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 1.75 IN. IN 2007 SNOWFALL 1.0 IN. IN 1916, 1962 PEAK GUST 66 MPH E IN 2007 TODAY'S REPORT PREPARED BY: Forrest Iwanik