BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSSION AND CLIMATE SUMMARY MONDAY, JUNE 24, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME TEMPERATURES EQUAL RECORD FOR THIS DATE--91F AIR MASS CONTINUES VERY HUMID--DEW POINT NEAR 70F SUNNY AND VERY HAZY CONDITIONS TODAY CHANCE OF THUNDERSTORM LATER TODAY The temperature has reached 90F early this afternoon for the second day this month; also 90F on June 1. Today's high has reached 91F; also recorded on this date in 1914 and 1976. Very hazy and humid contions today are only allowing a maximum visibility of barely 20 miles as dew points flirt with the 70-degree mark. We're expecting a possible thunderstorm late this afternoon or evening. Hot weather today and tomorrow may challenge record highs. Blue Hill Current Record High Maximum Temperatures (1885-2012) Jun 24 91F in 1914, 1976 Jun 25 93F in 1943, 1980, 2005 Blue Hill Wettest Junes, inches (1886-2013) 1) 17.32 in 1998 2) 13.73 in 1982 3) 12.31 in 2006 4) 11.13 in 2013 (through 6/23) 5) 10.78 in 1922 Today's Observations: 7 A.M. Weather: Clear, stratus layer along horizon SE-SW, few altocumulus lenticularis W-N, few cirrus NNW-N, and south Temperature: 74F; Dew Point: 70F; Wind: WSW at 8 kts. Sea-level pressure: 30.01 ins. Hg, rising slightly Visibility: 15 miles, except 20 miles WNW, hazy 6-hour min. temp: 68F BHO SA 1155 CLR 15 166/74/70/2408/001/ STRA LYR ALG HRZN SE-SW FEW ACSL W-N FEW CI NW-N AND S VSBY WNW 20 HAZY ALQDS/ 8/641 53002 10074 20068 10 A.M. Weather: Clear, perfectly clear, SKC Temperature: 84F; Dew Point: 71F; Wind: W at 10 kts, Wind: Direction variable WSW-WNW Sea-level pressure: 30.00 ins. Hg, falling slightly Visibility: 20 miles, hazy BHO SA 1455 CLR 20 159/84/71/2610/000/ SKC HAZY WND 24V30/ 58007 1 P.M. Weather: Scattered cirrus, thin scattered cirrus (2 levels), few cumulus fractus, cumulus forming Temperature: 89F; Dew Point: 70F; Wind: W at 10 kts, Wind: Direction variable WSW-WNW Wind: Wind gust to 19 kts past hour Sea-level pressure: 29.98 ins. Hg, falling then falling more rapidly Visibility: 20 miles, hazy 6-hr max. 90F BHO SA 1755 250 SCT 300 –SCT 20 151/89/70/2710/998/ SML CUFRA/CU FRMG ALQDS WND GST 19 KTS PST HR WND 24V30/ 8/101 58008 10090 20074 WEATHER SUMMARY FOR SUNDAY, JUNE 23, 2013 TEMPERATURE (DEGREES F) MAX.....87 NORMAL.....77 MIN.....63 NORMAL.....59 MEAN....75 NORMAL.....68 DEPARTURE FROM 30-YEAR NORMAL....................+7 TOTAL DEPARTURE FOR THE MONTH...................+12 [+0.3 DEGREE/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..............0 DEPARTURE..........-1 TOTAL HEATING UNITS FOR THE MONTH.............47 DEPARTURE.........-20 TOTAL HEATING UNITS FOR THE SEASON..........5781 DEPARTURE........-589 TOTAL HEATING UNITS LAST SEASON TO DATE.....4983 DIFFERENCE.......+798 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...............29 SW AT 5:54 P.M. AERO....................31 SW AT 5:17 P.M. * ASOS....................31 SW AT 5:55 P.M. DAVIS...................31 SSW AT 5:54 P.M. RMY 32 FASTEST MILE FOR YESTERDAY.................22 SW AT 5:55 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..............23 SSW AT 5:55 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.............23 SSW AT 3:47 P.M. AVERAGE WIND SPEED AND DIRECTION.........14.3 SSW ASOS..................14.5 DAVIS.................13.4 SSW [210 deg] * last of several occurrences... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M... 0.00 DEPARTURE............-0.11 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH.........11.13 DEPARTURE............+7.63 ASOS.............11.20 TOTAL PRECIPITATION FOR THE YEAR..........31.22 DEPARTURE............+5.06 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/.../.. 45 NW AERO 51 MPH NW RMY 48 TSTM 6/18 74/56/65/-2/0.61/.../.. 32 ENE AERO 32 MPH ENE RMY 33 TSTM 6/19 71/53/62/-5/T/.../.. 20 NNE AERO 20 MPH NNE RMY N/A 6/20 78/53/66/-2/0.00/.../.. 18 SSW AERO 20 MPH SSW RMY N/A 6/21 82/57/70/+2/0.00/.../.. 22 SW AERO 22 MPH SW RMY 23 6/22 82/62/72/+4/0.00/.../.. 23 SW AERO 24 MPH SW RMY 25 6/23 87/63/75/+7/T/.../.. 29 SW AERO 31 MPH SW RMY 32 6/24 morning low temp: 68F; 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 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 24 HIGH 91F IN 1914,1976 LOW 40F IN 1932 PRECIP 2.80 INS IN 1929 PEAK GUST 54 MPH WNW IN 2010 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 TODAY'S REPORT PREPARED BY: Robert Skilling; Mark Medlinskas