BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JUNE 27, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME MUCH COOLER, DAMP, AND FOGGY TODAY LIGHT NE WINDS AND SOME DRIZZLE Visibility was down to zero in heavy fog at 8 A.M. EDT observation time today. Low stratus clouds and fog had come in from the ocean overnight and was persisting today. Temperatures were much cooler than over the previous week with a low 61F only able to recover to 66F by early this afternoon. Light NE-ENE winds continued with drizzle, mostly very light, at times so far today. Mostly widely scattered rain showers around southern New England have made only a brief appearance here at the summit. June 2013 remains the fourth wettest on record so far at Blue Hill. Some unsettled weather is expected for the final few days of the month, which may move this month higher on the list. Blue Hill Wettest Junes, inches (1886-2013) 1) 17.32 in 1998 2) 13.73 in 1982 3) 12.31 in 2006 4) 11.21 in 2013 (through 13E 6/27) 5) 10.78 in 1922 Today's Observations: 7 A.M. Weather: Obscurement with heavy fog, very light drizzle is occurring Temperature: 61F; Dew Point: 61F; Wind: NE at 7 kts, Sea-level pressure: 29.87 ins. Hg, rising Visibility: 0V1/16 mile in heavy fog, light drizzle occurring 24-hr. precip: 0.02 in. 6-hour min. temp: 61F 6-hour precip: trace BHO SA 1155 W2 X 0VL-F 116/61/61/0507/987/ VSBY 0V1/16 PCPN VRY LGT/ 8//// 51015 MANUAL 6000/ MANUAL 70002 ASOS 70002 10065 20061 10 A.M. Weather: Obscurement with heavy fog Temperature: 64F; Dew Point: 64F; Wind: NE at 4 kts, Sea-level pressure: 29.85 ins. Hg, falling then more rapidly Visibility: 1/16 mile, heavy fog BHO SA 1455 W2X 1/16 109/64/64/0504/985/ 8//// 58007 MANUAL 6000/ 1 P.M. Weather: Partial obscurement with fog, stratus drifting over the summit, fog obscuring 5/10 of sky, light drizzle occurring, a very light rain shower past hour Temperature: 65F; Dew Point: 65F; Wind: NE at 7 kts, Sea-level pressure: 29.83 ins. Hg, falling then more rapidly Visibility: 1/4 mile, variable 1/8 to 1/2 mile, N-NE 1/8, S-W 3/4 6-hour max. temp: 66F 6-hr. precip: trace BHO SA 1755 –X E2 OVC 1/4VL-F 101/65/65/0507/983/ F5 VSBY 1/8V1/2 N-NE 1/8 S-W 3/4 STRA DRFTG OVR SMT RB00EUKNLBUKN/ 8/6// 58008 MANUAL 6000/ 10066 20061 WEATHER SUMMARY FOR WEDNESDAY, JUNE 26, 2013 TEMPERATURE (DEGREES F) MAX.....83 NORMAL.....78 MIN.....65 NORMAL.....60 MEAN....74 NORMAL.....69 DEPARTURE FROM 30-YEAR NORMAL....................+5 TOTAL DEPARTURE FOR THE MONTH...................+37 [+1.2 DEGREE/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..............0 DEPARTURE..........-1 TOTAL HEATING UNITS FOR THE MONTH.............47 DEPARTURE.........-23 TOTAL HEATING UNITS FOR THE SEASON..........5781 DEPARTURE........-592 TOTAL HEATING UNITS LAST SEASON TO DATE.....4984 DIFFERENCE........+797 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...............20 NNE AT 5:49 P.M. AERO....................20 NNE AT 5:49 P.M. ASOS....................20 NNE AT 5:49 P.M. DAVIS...................20 W AT 3:07 A.M. RMY N/A FASTEST MILE FOR YESTERDAY.................15 W AT 12:42 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..............15 NE AT 6:05 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.............14 W AT 3:22 A.M. AVERAGE WIND SPEED AND DIRECTION..........7.8 W ASOS...................7.6 DAVIS..................7.3 WNW [300 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.02 DEPARTURE............-0.10 ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH.........11.21 DEPARTURE............+7.35 ASOS.............11.26 TOTAL PRECIPITATION FOR THE YEAR..........31.30 DEPARTURE............+4.78 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 90/69/78/+9/T/.../.. 32 W AERO 33 MPH W RMY 39 6/26 83/65/74/+5/0.02/.../.. 20 NNE AERO 20 MPH NNE RMY 20 6/27 morning low temp: 61F; 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 27 HIGH 93F IN 1999, 2007 LOW 46F IN 1897 PRECIP 1.72 INS IN 1938 PEAK GUST 55e N IN 1945 RECORDS FOR JUNE 28 HIGH 95F IN 1991 LOW 47F IN 1970 PRECIP 2.09 INS IN 1938 PEAK GUST 52 MPH WSW IN 1993 TODAY'S REPORT PREPARED BY: Robert Skilling/ Mark Medlinskas