BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, JUNE 5, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME   A SLIGHTLY WARMER BUT BEAUTIFUL SUNNY JUNE DAY AIR CONTINUES VERY DRY WITH DEW POINTS IN THE 40'S   The high temperature early this afternoon was running a couple of degrees warmer than yesterday while the morning low was 3 degrees less cool than on Tuesday morning.  The air continues dry with temperature reaching the lower 70's and dew points in the lower 40's. Visibility is 70 miles with light distant just like on Tuesday. Winds are lighter with the peak gust lower than 20 MPH as of early this afternoon.   A few preliminary spring statistics have been included below the May statistics.  It was a slightly warm, dry but very snowy spring.   MAY 2013 PRELIMINARY STATISTICS: (departures relative to 1981-2010 average)   TEMPERATURE: Average Max Temp:  69.5F [+3.2F] Average Min Temp:  48.2F [+0.4F] Mean Temp:  58.9F [+1.8F] 24-hr. Corr. Mean Temp:  58.2F [+2.0F] Max Temp:  92F on 31st Min Temp:  37F on 5th and 26th Total heating degree day units (month):    212 [ -56] *NCDC method Total heating degree day units (season): 5,734 [-569] *start July 1 (NCDC)   PRECIPITATION: Total precipitation:  3.71 inches [-0.40 inches] Greatest 24-hr precipitation:  1.17 on 29th Total snowfall:  0.0 [-0.0 inches] Total seasonal snowfall:  99.0 inches [+36.3 inches]   WIND: Avg wind speed:  10.9 MPH Avg corrected wind speed:  11.3 MPH Prevailing wind direction: S [18%] Peak gust: 44 MPH NW on 26th Peak fastest mile: 33 MPH SSW on 11th   SUNSHINE: Astronomical minutes: 15,304 of a possible 27,136, or 57%  Campbell-Stokes card minutes: 14,850 of a possible 26,226, or 57% Long term average: 52%     METEOROLOGICAL SPRING PRELIMINARY STATISTICS (March 1 - May 31): (departures relative to 1981-2010 average)   TEMPERATURE: 24-hr. Corr. Mean Temp:  46.8F [+0.7F]   PRECIPITATION Total precipitation:  11.70 inches [-2.54 inches] Total snowfall:  37.8 inches [+22.1 inches]    *8th snowiest Spring (records 1885-2013)     Today's observations:   7 A.M. Weather: Thin scattered cirrus and thin broken cirrus Temperature: 59F; Dew Point: 46F; Wind: WNW at 10 kts, Wind: Direction variable W-NNW Sea-level pressure: 30.19 ins. Hg, rising then more slowly Visibility: 70 miles, light distant haze 24-hr precip: 0.00 inch 6-hr min. temp: 51F BHO SA 1155 250 –SCT 300 –BKN 70 222/59/46/3306/019/ THN K LYR ALG HRZN DSNT S-SSW LGT DSNT HZ/ 8/001 51017 10059 20051   10 A.M. Weather: Scattered thin cirrus, thin broken cirrus  Temperature: 66F; Dew Point: 43F; Wind: WNW at 6 kts, Wind: Light and variable Sea-level pressure: 30.20 ins. Hg, rising Visibility: 70 miles, light distant haze BHO SA 1455 250 –SCT 300 –BKN 70 226/66/43/3006/020/ SML CUFRA/CU FRMG LGT DSNT HZ/ 8/001 51004   1 P.M. Weather: Scattered small cumulus, cumulus fractus, thin scattered cirrus (2 levels) Temperature: 71F; Dew Point: 42F; Wind: W at 7 kts, Wind: Direction variable WSW-NW Sea-level pressure: 30.16 ins. Hg, falling then more rapidly Visibility:  70 miles, 6-hour max. temp: 72F BHO SA 1755 65 SCT 250 –SCT 300 –SCT 70 215/71/42/2707/016/ SML CUFRA/ CU/ LGT DSNT HZ WND 24V32/ 8/101 58011 10072 20059   WEATHER SUMMARY FOR TUESDAY, JUNE 4, 2013   TEMPERATURE (DEGREES F) MAX.....70     NORMAL.....72 MIN.....48     NORMAL.....54 MEAN....59     NORMAL.....63   DEPARTURE FROM 30-YEAR NORMAL....................-4 TOTAL DEPARTURE FOR THE MONTH...................+31 [+7.6 DEGREES/DAY]   HEATING DEGREE DAYS  TOTAL HEATING UNITS FOR YESTERDAY.............6   DEPARTURE..........+2 TOTAL HEATING UNITS FOR THE MONTH.............6   DEPARTURE.........-12 TOTAL HEATING UNITS FOR THE SEASON.........5740   DEPARTURE........-581 TOTAL HEATING UNITS LAST SEASON TO DATE....4925   DIFFERENCE.......+815   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...............25 W   AT 10:44 A.M.                    AERO....................25 W   AT 10:44 A.M. *                    ASOS....................25 W   AT 10:44 A.M.                     DAVIS...................24 NW  AT 10:28 A.M. RMY: 25 FASTEST MILE FOR YESTERDAY.................18 NW  AT  2:14 P.M.  MAXIMUM 2-MINUTE ASOS AVERAGE..............18 NW  AT  2:15 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.............18 W   AT 10:45 A.M. AVERAGE WIND SPEED AND DIRECTION..........11.1  WNW                      ASOS...................10.4                    DAVIS...................9.8 NW [310 deg] *last of several occurrences...   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE...........-0.17                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.47  DEPARTURE...........-0.19                          ASOS..............0.43 TOTAL PRECIPITATION FOR THE YEAR..........20.56  DEPARTURE...........-2.76                          ASOS..............N/A* *ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals                         PRELIMINARY CLIMATE SUMMARY FOR MAY & 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                                5/1  67/45/56/+3/0.00/845/100        18 E   AERO 16 MPH E   RMY 17 5/2  75/43/59/+6/T/669/79            29 NE  AERO 26 MPH NE  RMY 29 5/3  54/42/48/-5/0.00/706/83         24 NE  AERO 25 MPH NE  RMY 28 5/4  55/40/48/-6/0.00/843/99         21 NE  AERO 23 MPH NE  RMY 23 5/5  58/37/48/-6/0.00/752/88         17 ENE AERO 17 MPH ENE RMY 20 5/6  66/40/53/-1/0.00/600/70         17 S   AERO 18 MPH S   RMY 20 5/7  77/50/64/+9/0.00/807/94         21 S   AERO 23 MPH S   RMY 25 5/8  71/55/63/+8/0.42/112/13         31 SSE AERO 35 MPH SSE RMY 35  TSTM 5/9  66/56/61/+6/0.41/078/09         16 NE  AERO 16 MPH NE  RMY 18  TSTM 5/10 79/54/67/+12/T/546/63  *        18 S   AERO 21 MPH S   RMY N/A 5/11 70/56/63/+7/0.06/026/03         43 SSW AERO 44 MPH SSW RMY 46 5/12 71/47/59/+3/0.05/339/39         30 W   AERO 32 MPH W   RMY 32 5/13 60/41/51/-5/0.00/821/94         25 WSW AERO 28 MPH WSW RMY 30 5/14 58/38/48/-9/T/385/44            22 W   AERO 24 MPH W   RMY 25 5/15 65/41/53/-4/0.02/456/52         35 S   AERO 38 MPH S   RMY 40 5/16 80/51/66/+9/0.00/844/96         40 W   AERO 45 MPH W   RMY 42 5/17 69/50/60/+3/0.00/872/99         24 NW  AERO 28 MPH NW  RMY 27 5/18 73/47/60/+2/0.00/689/78         21 SE  AERO 24 MPH SE  RMY 24 5/19 71/50/61/+3/0.11/407/46         21 S   AERO 23 MPH S   RMY 24 5/20 81/54/68/+10/0.01/496/56        21 S   AERO 21 MPH S   RMY N/A 5/21 81/49/65/+6/0.14/506/57         29 NE  AERO 31 MPH NE  RMY 32  TSTM 5/22 66/48/57/-2/0.04/009/01         27 WNW AERO 25 MPH WNW RMY N/A 5/23 74/53/64/+5/0.09/036/04         35 S   AERO 39 MPH S   RMY 40 5/24 68/49/59/0/0.57/000/00          33 S   AERO 35 MPH S   RMY N/A 5/25 50/39/45/-15/0.59/000/00        32 NW  AERO 35 MPH NW  RMY 32 5/26 58/37/48/-12/0.03/332/37        44 NW  AERO 44 MPH NW  RMY 45 5/27 70/41/56/-4/0.00/880/98         33 WNW AERO 33 MPH WNW RMY 36 5/28 74/55/65/+4/0.00/639/71         20 S   AERO 20 MPH S   RMY 21 5/29 71/56/64/+3/1.17/045/05         25 W   AERO 27 MPH W   RMY 27  TSTM 5/30 86/63/75/+14/0.00/839/93        25 W   AERO 25 MPH W   RMY 27 5/31 92/68/80/+19/0.00/805/89        25 SW  AERO 25 MPH SW  RMY 27   * 5/10; the astronomical sunshine minutes is corrected   from 333 to 546 mins. the percent remains correct @ 63%   6/1  90/69/80/+18/0.00/.../..        30 SW  AERO 32 MPH SW  RMY 33 6/2  86/64/75/+13/T/.../..           42 SSW AERO 44 MPH SSW RMY 46 6/3  75/57/66/+4/0.47/.../..         22 WNW AERO 22 MPH SSW RMY 22 6/4  70/48/59/-4/0.00/.../..         25 W   AERO 25 MPH W   RMY 25   6/5  morning low temp: 51F; the normal low is now 54F   DAILY RECORDS FOR MAY 2013 5/26 - TIED DAILY RECORD MINIMUM TEMPERATURE OF 37F;       previous record of 37F set in 1972. 5/31 - TIED DAILY RECORD MAXIMUM TEMPERATURE OF 92F;       previous record of 92F set in 1937.   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 5 HIGH 95F IN 1930 LOW 41F IN 1891 PRECIP 2.83 INS IN 1982 PEAK GUST 57 MPH NNW IN 1988   RECORDS FOR JUNE 6 HIGH 95F IN 1925 LOW 42F IN 1885, 1894, 1920, 1945 PRECIP 3.61 INS IN 2000 PEAK GUST 58 MPH NE IN 2000   TODAY'S REPORT PREPARED BY: Robert Skilling