BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 24, 2012
ALL TIMES ARE IN EASTERN STANDARD TIME
 
SCATTERED THUNDERSHOWERS YESTERDAY AFTERNOON LEAVE 0.20 INCH RAINFALL ON SUMMIT
SEASONABLE TEMPERATURES RETURN ALONG WITH EXCELLENT VISIBILITY AND MOSTLY CLEAR SKIES
 
A late afternoon thundershower passed over the region yesterday leaving 0.20 inch
of rainfall here on the summit and a peak gust of 48 mph. The rainfall, although
not much, was much needed after our three day dry spell. Blue Hill still remains
about half an inch below normal for the month. Today has been an excellent
hiking/biking day as plenty of people are out and about on the Reservation. Humidity
values have dropped off tremendously since this morning, providing a crisp, clear
view of Grand Monadnock out to the northwest. Skies have been mostly clear with some
diurnal cumulus clouds passing over the Observatory beginning early this afternoon
in addition to some appealing contrails.
 
Yesterday marked the fourth straight day of above normal temperatures. This is slowly
chipping away at our monthly average temperature departure, which is now only about
2 deg F below normal after a cool start to June.
 
Today's observations:
 
7 A.M.
Weather: Clear, few faint altocumulus/altocumulus lenticularis distant NNE-NE
Temperature: 65F, Dew Point: 59F; Wind: WNW at 11 kts,
Wind: Direction variable W-NNW
Sea-level pressure: 29.96 inches Hg, steady then increasing
Visibility: 75 miles
6-hour min. temp: 65F
24-hour precip: 0.20 inch
BHO SA 1155 CLR 146/65/59/3011/996/ FEW FAINT AC/ACSL DSNT NNE-NE WND 27V33/ 8/040
53017 MANUAL 70020 ASOS 70023 10065 20059
 
10 A.M.
Weather: Clear, few cumulus/cumulus fractus forming distant WSW-NW and SE, few cirrus
SE-WNW
Temperature: 77F, Dew Point: 54F; Wind: NW at 12 kts,
Wind: Direction variable W-NNW
Sea-level pressure: 29.96 inches Hg, increasing then decreasing
Visibility: 75 miles
BHO SA 1455 CLR 147/77/54/3112/996/ FEW CU/CUFRA FRMG DSNT WSW-NW AND SE FEW CI SE-WNW
WND 26V33/ 8/101 50001
 
1 P.M.
Weather: Scattered cumulus humilis, scattered dense cirrus, scattered thin cirrus,
contrails all quadrants
Temperature: 81F, Dew Point: 50F; Wind: W at 11 kts,
Wind: Direction variable WSW-NNW
Sea-level pressure: 29.93 inches Hg, decreasing
Visibility: 75 miles
6-hour max. 81F
6-hour min. 65F
BHO SA 1755 35 SCT 200 SCT 250 –SCT 75 137/81/50/2811/993/ CONTRAILS ALQDS WND 25V33/
8/101 58010 10081 20065
 
 
WEATHER SUMMARY FOR SATURDAY, JUNE 23
 
TEMPERATURE (DEGREES F)
MAX.....85    NORMAL.....77
MIN.....61    NORMAL.....59
MEAN....73    NORMAL.....68
 
DEPARTURE FROM 30-YEAR NORMAL.......................+5
TOTAL DEPARTURE FOR THE MONTH......................-38 [-1.9 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE..........-1
TOTAL HEATING UNITS FOR THE MONTH..............95   DEPARTURE.........+28
TOTAL HEATING UNITS FOR THE SEASON...........4983   DEPARTURE.......-1381
TOTAL HEATING UNITS LAST SEASON TO DATE......6228   DIFFERENCE......-1245
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............48 NNW AT 4:29 P.M.
                   AERO..................50 NNW AT 4:29 P.M. 
                   ASOS..................49 W   AT 4:29 P.M.
                   DAVIS.................45 WNW AT 4:30 P.M. RMY 46
THE FASTEST MILE FOR YESTERDAY...........34 NNW AT 4:30 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE............32 WNW AT 4:31 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........32 WNW AT 4:31 P.M.
AVERAGE WIND SPEED AND DIRECTION........7.4 NNW
                   ASOS.................6.9
                   DAVIS................6.8 NW [315 deg.]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.20   DEPARTURE...........+0.09
                         ASOS..............0.23
TOTAL PRECIPITATION FOR THE MONTH..........3.03   DEPARTURE...........-0.47
                         ASOS..............2.93
TOTAL PRECIPITATION FOR THE YEAR..........16.27   DEPARTURE...........-9.89
                         ASOS.............16.18
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE 2012 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust when significant
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  67/53/60/-2/0.00/742/82        28 ENE AERO 28 MPH ENE RMY 29
6/2  63/52/58/-4/0.80/000/00        39 SE  AERO 39 MPH SE  RMY 40
6/3  62/50/56/-6/0.01/082/09        31 N   AERO 28 MPH N   RMY 29
6/4  50/47/49/-14/0.58/000/00       44 NNE AERO 43 MPH NNE RMY 43
6/5  54/47/51/-12/0.23/009/01       23 NNE AERO 18 MPH NNE RMY N/A
6/6  63/48/56/-7/0.01/310/34        16 ENE AERO 14 MPH ENE RMY 15
6/7  70/50/60/-4/0.27/328/36        31 NE  AERO 31 MPH NE  RMY 32 TSTM,1/8" HAIL
6/8  76/51/64/0/0.03/502/55         25 WSW AERO 25 MPH WNW RMY 26 TSTM
6/9  76/56/66/+2/T/822/90           25 WNW AERO 24 MPH WNW RMY 24
6/10 78/56/67/+2/0.00/868/95        21 E   AERO 18 MPH E   RMY 18
6/11 76/55/66/+1/0.00/521/57        23 S   AERO 21 MPH S   RMY 22
6/12 73/57/65/0/0.03/320/35         29 S   AERO 29 MPH S   RMY 30
6/13 63/60/62/-3/0.59/000/00        25 S   AERO 23 MPH S   RMY N/A
6/14 69/58/64/-2/0.00/624/68        32 NNE AERO 29 MPH NE  RMY 31
6/15 68/54/61/-5/0.00/890/97        28 ENE AERO 24 MPH ENE RMY 25
6/16 64/51/58/-8/T/485/53           28 NE  AERO 24 MPH NE  RMY 27
6/17 67/50/59/-8/0.00/752/82        21 E   AERO 17 MPH E   RMY 19
6/18 68/50/59/-8/0.00/.../..        21 S   AERO 20 MPH S   RMY 20
6/19 73/53/63/-4/0.00/.../..        24 SW  AERO 23 MPH SW  RMY 24 
6/20 93/62/78/+10/0.00/.../..       22 SW  AERO 22 MPH SW  RMY N/A
6/21 94/74/84/+16/0.00/.../..       22 NW  AERO 22 MPH NW  RMY 21
6/22 93/69/81/+13/..../.../..       40 W   AERO 39 MPH W   RMY 43 TSTM
6/23 85/61/73/+5/...../.../..       48 NNW AERO 50 MPH NNW RMY 46 TSTM
 
6/24 morning low temp: 59F; the normal low is now 60F
 
DAILY RECORDS FOR JUNE 2012
6/4 - NEW DAILY RECORD LOW MAXIMUM TEMP OF 50F;
surpasses the previous record of 51F in 1891.
 
6/21 - NEW DAILY RECORD HIGH MAXIMUM TEMP OF 94F;
surpasses the previous record of 92F in 1949.
 
6/21 - DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F;
ties the current record of 74F in 1923.
 
6/22 - DAILY RECORD HIGH MAXIMUM TEMP OF 93F;
ties the current record of 93F in 1921.
 
6/22 - DAILY RECORD HIGH MINIMUM TEMP OF 69F;
ties the current record of 69F in 1892.
 
 
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 46 MPH S IN 1985
 
RECORDS FOR JUNE 25
HIGH 93F IN 1943,1980, 2005
LOW 47F IN 1903
PRECIP 1.10 INS IN 2006
PEAK GUST 51 MPH W IN 1960
 
TODAY'S REPORT PREPARED BY: George Tabeek