BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 20, 2012
ALL TIMES ARE IN EASTERN STANDARD TIME
 
TEMPERATURES REACH 90F SHORTLY BEFORE 1 P.M. EDT TODAY
VERY HUMID WITH DEW POINTS 72 TO 73F BY LATE MORNING
MAY COME UP SHORT OF THE RECORD 94F SET IN 1953
 
Today's high temperature as of 2 P.M. EDT was 91F which
is 3 degrees shy of the record for the date.  The dew
point temperature seems to have settled out to right
about 72F making it feel extremely humid.  A couple of
times the dew point has hit 73F.  A thick haze limits
visibility to 12 early this afternoon and there a just
some scattered cumulus clouds to be seen in the hazy sky.
 
The summer equinox will occur at 7:09 PM EDT today, June 20,
and astronomical summer will then begin.
Meteorological summer began on June 1.
 
CURRENT RECORD HIGHS FOR BLUE HILL
6/20  94F in 1953
6/21  92F in 1949
6/22  93F in 1921
 
Today's observations:
 
7 A.M.
Weather: Thin scattered cirrus, patch altocumulus
vicinity of station NW
Temperature: 71F, Dew Point: 66F; Wind: WSW at 8 kts,
Sea-level pressure: 30.01 inches Hg, rising slightly then steady
Visibility: 10 miles, hazy, except 12 miles ENE
6-hour min. temp: 62F
BHO SA 1155 250 –SCT 10 164/71/66/2508/001/ SML PTCH AC VC NW
VSBY ENE 12 HAZY ALQDS/ 8/031 50003 10071 20063
 
10 A.M.
Weather Clear, SKC 
Temperature: 85F, Dew Point: 72F; Wind: WNW at 7 kts,
Wind: Direction variable WSW-NW
Sea-level pressure: 30.00 inches Hg, falling slightly
Visibility: 10 miles, hazy, ENE 12 miles 
BHO SA 1455 CLR [SKC] 10 158/85/72/2907/000/ VSBY ENE 12
WND 25V32/ 58006
 
1 P.M.
Weather: Scattered cumulus, hazy 
Temperature: 90F, Dew Point: 72F; Wind: W at 10 kts,
Wind: Direction variable WSW-NW 
Sea-level pressure: 29.96 inches Hg, falling, then more rapidly
Visibility: 12 miles, hazy
6-hour max. 91F
6-hour min. 71F
BHO SA 1755 45 SCT 12 145/90/72/2810/996/ WND 25V31
HAZY/ 8/100 58013 10091 20071
 
WEATHER SUMMARY FOR TUESDAY, JUNE 19
 
TEMPERATURE (DEGREES F)
MAX.....73    NORMAL.....76
MIN.....53    NORMAL.....58
MEAN....63    NORMAL.....67
 
DEPARTURE FROM 30-YEAR NORMAL.......................-4
TOTAL DEPARTURE FOR THE MONTH......................-82 [-4.5 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY...............2   DEPARTURE...........0
TOTAL HEATING UNITS FOR THE MONTH..............95   DEPARTURE.........+35
TOTAL HEATING UNITS FOR THE SEASON...........4983   DEPARTURE.......-1374
TOTAL HEATING UNITS LAST SEASON TO DATE......6223   DIFFERENCE......-1240
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............24 SW  AT 10:09 P.M.
                   AERO..................23 SW  AT 10:09 P.M.
                   ASOS..................23 SW  AT 10:09 P.M. .
                   DAVIS.................23 SW  AT 10:08 P.M. RMY 24
THE FASTEST MILE FOR YESTERDAY...........18 SSW AT 10:03 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE............18 SW  AT 10:16 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........18 SSW AT 10:04 P.M. .
AVERAGE WIND SPEED AND DIRECTION.......12.1 SW
                   ASOS................11.5
                   DAVIS...............11.2 SW [215 deg.]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE...........-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........2.55   DEPARTURE...........-0.46
                         ASOS..............2.47
TOTAL PRECIPITATION FOR THE YEAR..........15.79   DEPARTURE...........-9.88
                         ASOS.............15.72
 
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 our morning low temp: 62F; the normal low is now 59F
 
DAILY RECORDS FOR JUNE 2012
6/4 - NEW DAILY RECORD LOW MAXIMUM TEMP OF 50F;
surpasses the previous record of 51F in 1891.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JUNE 20
HIGH 94F IN 1953
LOW 41F IN 1918
PRECIP 2.62 INS 1945
PEAK GUST 63 MPH NE IN 1967, SSW IN 2010
 
RECORDS FOR JUNE 21
HIGH 92F IN 1949
LOW 42F IN 1940
PRECIP 1.40 INS 1903
PEAK GUST 51 MPH SSW IN 2000
 
TODAY'S REPORT PREPARED BY: Robert Skilling