BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSSION AND CLIMATE SUMMARY TUESDAY, JUNE 25, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME ANOTHER HOT, HUMID, HAZY SUMMER DAY While it certainly is hot today, the record high for the date of 93F set in 1943, 1980, and 2005 appears to be out reach. The high temperature so far this afternoon has reached 89F. Much like yesterday, it is quite humid with dew point temperatures nearing 70F. The moisture in the air is providing for plenty of haze that is keeping visibility limited to 20-25 miles. Yesterday, afternoon and evening thunderstorms in the area managed to dodge Blue Hill for the most part. Only 0.06 inch of rain was recorded on the summit. Blue Hill Wettest Junes, inches (1886-2013) 1) 17.32 in 1998 2) 13.73 in 1982 3) 12.31 in 2006 4) 11.19 in 2013 (through 6/24) 5) 10.78 in 1922 Today's Observations: 7 A.M. Weather: Scattered altocumulus, broken altocumulus, broken cirrus, thin smoke layer along horizon S-W-NE, hazy Temperature: 71F; Dew Point: 65F; Wind: WSW at 9 kts. Sea-level pressure: 29.91 ins. Hg, steady then falling Visibility: 30 miles, hazy 24-hr. precip: 0.06 inch 6-hour min. temp: 67F BHO SA 1155 120 SCT E140 BKN 250 BKN 30 128/71/65/2509/991/ THN K LYR ALG HRZN S-W-NE HAZY/ 8/031 58007 MANUAL 70006 ASOS 70005 10071 20067 10 A.M. Weather: Scattered thin cirrus (2 levels), few patches dense cirrus distant N-NNE, cirrus mostly distant SW-NW-ENE invading the sky, hazy Temperature: 82F; Dew Point: 68F; Wind: W at 11 kts. Sea-level pressure: 29.91 ins. Hg, rising then falling slightly Visibility: 25 miles, hazy BHO SA 1455 250 –SCT 300 –SCT 25 127/82/68/2611/991/ FEW PTCHS DNS CI DSNT N-NNE CI MSTLY DSNT SW-NW-ENE INVADING HAZY/ 8/004 55001 1 P.M. Weather: Scattered cumulus, scattered thin cirrus, few towering cumulus SSE-SSW moving E, few moderate cumulus and cumulus fractus all quadrants, hazy Temperature: 88F; Dew Point: 69F; Wind: W at 10 kts, Sea-level pressure: 29.86 ins. Hg, falling Visibility: 25 miles, hazy 6-hour max. temp: 89F BHO SA 1755 45 SCT 250 –SCT 25 113/88/69/2710/986/ FEW TCU SSE-SSW MOVG E FEW MDT CU ALQDS FEW CUFRA ALQDS HAZY/ 8/201 58014 10089 20071 WEATHER SUMMARY FOR MONDAY, JUNE 24, 2013 TEMPERATURE (DEGREES F) MAX.....91 NORMAL.....78 MIN.....68 NORMAL.....60 MEAN....80 NORMAL.....69 DEPARTURE FROM 30-YEAR NORMAL...................+11 TOTAL DEPARTURE FOR THE MONTH...................+23 [+0.8 DEGREE/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..............0 DEPARTURE..........-1 TOTAL HEATING UNITS FOR THE MONTH.............47 DEPARTURE.........-22 TOTAL HEATING UNITS FOR THE SEASON..........5781 DEPARTURE........-590 TOTAL HEATING UNITS LAST SEASON TO DATE.....4983 DIFFERENCE.......+798 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...............28 W AT 7:22 P.M. AERO....................30 W AT 7:22 P.M. ASOS....................31 W AT 7:22 P.M. DAVIS...................29 W AT 7:22 P.M. RMY 30 FASTEST MILE FOR YESTERDAY.................22 W AT 7:22 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..............20 N AT 7:29 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.............19 W AT 7:23 P.M. AVERAGE WIND SPEED AND DIRECTION..........12.0 WSW ASOS...................11.5 DAVIS..................11.1 WSW [250 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.06 DEPARTURE............-0.06 ASOS..............0.05 TOTAL PRECIPITATION FOR THE MONTH.........11.19 DEPARTURE............+7.57 ASOS.............11.25 TOTAL PRECIPITATION FOR THE YEAR..........31.28 DEPARTURE............+5.00 ASOS..............N/A* *ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals PRELIMINARY CLIMATE SUMMARY FOR JUNE 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 6/1 90/69/80/+18/0.00/905/100 30 SW AERO 32 MPH SW RMY 33 6/2 86/64/75/+13/T/761/84 42 SSW AERO 44 MPH SSW RMY 46 6/3 75/57/66/+4/0.47/154/17 22 WNW AERO 22 MPH SSW RMY 22 6/4 70/48/59/-4/0.00/899/99 25 W AERO 25 MPH W RMY 25 6/5 73/51/62/-1/0.00/727/80 20 SSW AERO 21 MPH S RMY 22 6/6 74/54/64/+1/0.03/455/50 22 SSE AERO 22 MPH S RMY 22 6/7 57/51/54/-10/3.28/000/00 33 NE AERO 32 MPH NE RMY 34 6/8 77/52/65/+1/0.78/356/39 29 W AERO 29 MPH W RMY 29 TSTM 6/9 78/57/68/+4/0.00/886/97 25 W AERO 23 MPH W RMY 25 6/10 69/55/62/-3/0.76/119/13 24 E AERO 24 MPH E RMY N/A 6/11 65/53/59/-6/1.61/000/00 29 E AERO 29 MPH E RMY N/A 6/12 69/54/62/-3/0.01/320/35 38 NW AERO 41 MPH NW RMY 41 6/13 65/50/58/-7/0.93/110/12 32 NE AERO 33 MPH NE RMY 34 6/14 70/61/61/-5/1.38/421/46 32 NE AERO 32 MPH NE RMY 29 6/15 77/56/67/+1/0.00/907/99 23 NW AERO 24 MPH NW RMY 26 6/16 74/57/66/0/0.00/266/29 25 S AERO 24 MPH S RMY 27 6/17 84/60/72/+5/1.27/734/80 45 NW AERO 51 MPH NW RMY 48 TSTM 6/18 74/56/65/-2/0.61/440/48 32 ENE AERO 32 MPH ENE RMY 33 TSTM 6/19 71/53/62/-5/T/761/83 20 NNE AERO 20 MPH NNE RMY N/A 6/20 78/53/66/-2/0.00/889/97 18 SSW AERO 20 MPH SSW RMY N/A 6/21 82/57/70/+2/0.00/724/79 22 SW AERO 22 MPH SW RMY 23 6/22 82/62/72/+4/0.00/743/81 23 SW AERO 24 MPH SW RMY 25 6/23 87/63/75/+7/T/834/91 29 SW AERO 31 MPH SW RMY 32 6/24 91/68/80/+11/0.06/.../.. 28 W AERO 30 MPH W RMY 30 TSTM 6/25 morning low temp: 67F; the normal low is now 60F DAILY RECORDS FOR JUNE 2013 6/1 - TIED DAILY RECORD MAXIMUM TEMPERATURE OF 90F; previous record of 90F set in 1937 6/1 - NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 69F; surpasses previous record of 68F set in 1944, 1987 6/24 - TIED DAILY RECORD MAXIMUM TEMPERATURE OF 91F; previous record of 91F set in 1914, 1976 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 25 HIGH 93F IN 1943,1980,2005 LOW 47F IN 1903 PRECIP 1.38 INS IN 2012 PEAK GUST 51 MPH W IN 1960 RECORDS FOR JUNE 26 HIGH 96F IN 1952 LOW 45F IN 1986 PRECIP 1.52 INS IN 1945 PEAK GUST 48 MPH N IN 1998 TODAY'S REPORT PREPARED BY: Sean Fankhauser