BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 29, 2012
ALL TIMES ARE IN EASTERN STANDARD TIME
 
HAZY, HOT AND HUMID WITH EARLY MORNING SHOWERS LEAVING 0.04 INCH
 
The warm-up has begun as temperatures soar into the mid 80s by early this afternoon.
A couple of brief showers passed over earlier this morning leaving only 0.04 inch.
Visibility has been down to about 20-30 miles for most of the day due to hazy
conditions. Winds have also been rather calm today, only between 5-12 mph out of the
south. Dew points have been in the mid to upper 60s, but have recently entered the
low 70s, providing very uncomfortable conditions. This warm and humid air mass will
stick around for the weekend.
 
June 2012 will be the first month since June 2011 to finish below average
temperature-wise. In addition, June 2012 will be the first month since November 2011
to finish above normal in precipitation.
 
Today's observations:
 
7 A.M.
Weather: Overcast altostratus undulatus opacus, few stratus fractus overhead, smoke
layer all quadrants except NE, hazy
Temperature: 68F; Dew Point: 64F;  
Wind: SSW at 10 kts
Sea-level pressure: 29.68 in Hg, decreasing then increasing
Visibility: 30 miles, 35 miles SE-SSW, 20 miles NNW-NNE, hazy  
6-hour min. temp: 65F
BHO SA 1155 E75 OVC 30 052/68/64/2010/968/ FEW STFRA OVD K LYR ALQDS XCPT NE VSBY
HIER SE-SSW 35 VSBY LWR NNW-NNE 20 HAZY/ 8/77/ 53007 10068 20065
 
10 A.M.
Weather: Broken altostratus, few stratus fractus drifting below summit NE-WSW, lone
cumulus forming distant NNE, patches of thin fog all quadrants, fog dissipating
ESE-WSW, hazy, rain shower began @ 09:23E and ended @ 09:28E.
Temperature: 71F; Dew Point: 69F
Wind: SE at 5 kts 
Sea-level pressure: 29.69 in Hg, increasing then decreasing 
Visibility: 20 miles, 25 miles ENE-ESE, 15 miles S-W, hazy
3-hour precip: 0.04 inch 
BHO SA 1455 E80 BKN 20 055/71/69/1405/969/ FEW STFRA DRFTG BLO SMT NE-WSW LONE CU
FRMG DSNT NNE PTCHS THN F ALQDS F DSPTNG ESE-WSW HAZY VSBY HIER ENE-ESE 25 VSBY LWR
S-W 15 RWB23E28/ 8/770 50003 ASOS 60004 MANUAL 60004
 
1 P.M.
Weather: Clear, few lower dense cirrus E-S, hazy
Temperature: 83F; Dew Point: 71F
Wind: SSW at 10 kts,
Sea-level pressure: 29.63 in Hg, falling
Visibility: 25 miles, 15 miles N-NE
6-hour max. temp: 83F 
6-hour precip: 0.04 inch
BHO SA 1755 CLR 25 034/83/71/2010/963/ FEW LWR DNS CI DSNT E-S HAZY VSBY LWR N-NE 15/
8/003 56021 ASOS 60004 MANUAL 60004 10083 20068
 
WEATHER SUMMARY FOR THURSDAY, JUNE 28
 
TEMPERATURE (DEGREES F)
MAX.....83    NORMAL.....79
MIN.....59    NORMAL.....61
MEAN....71    NORMAL.....70
 
DEPARTURE FROM 30-YEAR NORMAL.......................+1
TOTAL DEPARTURE FOR THE MONTH......................-47 [-1.9 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE..........-1
TOTAL HEATING UNITS FOR THE MONTH..............96   DEPARTURE.........+24
TOTAL HEATING UNITS FOR THE SEASON...........4984   DEPARTURE.......-1385
TOTAL HEATING UNITS LAST SEASON TO DATE......6239   DIFFERENCE......-1255
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.............25 WNW AT 12:38 P.M. *
                   AERO..................24 WNW AT 12:38 P.M. *
                   ASOS..................24 WNW AT 12:24 P.M.
                   DAVIS.................24 W   AT 12:24 P.M. RMY 26
THE FASTEST MILE FOR YESTERDAY...........19 W   AT 11:24 A.M. *  
MAXIMUM 2-MINUTE ASOS AVERAGE............18 W   AT 11:24 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE...........16 W   AT 11:24 A.M.
AVERAGE WIND SPEED AND DIRECTION.......11.4 W
                   ASOS................11.2
                   DAVIS................9.9 W [266 deg]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE...........-0.10
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........4.41   DEPARTURE...........+0.33
                         ASOS..............4.33
TOTAL PRECIPITATION FOR THE YEAR..........17.65   DEPARTURE...........-9.09
                         ASOS.............17.58
 
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/-8/0.00/761/83        21 S   AERO 20 MPH S   RMY 20
6/19 73/53/63/-4/0.00/284/31        24 SW  AERO 23 MPH SW  RMY 24 
6/20 93/62/78/+10/0.00/844/92       22 SW  AERO 22 MPH SW  RMY N/A
6/21 94/74/84/+16/0.00/872/95       22 NW  AERO 22 MPH NW  RMY 21
6/22 93/69/81/+13/0.13/633/69       42 W   AERO 39 MPH W   RMY 43 TSTM
6/23 85/61/71/+5/0.35/504/55        48 NNW AERO 50 MPH NNW RMY 46 TSTM  
6/24 82/59/71/+2/0.00/715/78        22 NW  AERO 21 MPH NW  RMY 21
6/25 71/59/65/-4/1.38/193/21        32 S   AERO 32 MPH S   RMY 32 TSTM
6/26 71/56/64/-5/T/339/37           35 NW  AERO 36 MPH NW  RMY 36
6/27 76/55/66/-3/T/321/35           29 W   AERO 28 MPH W   RMY 30
6/28 83/59/71/+1/0.00/.../..        25 WNW AERO 24 MPH WNW RMY 26
 
6/29 our morning low temp: 65F; the normal low is now 61F
 
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 - TIED DAILY RECORD HIGH MINIMUM TEMP OF 74F;
ties the current record of 74F in 1923.
6/22 - TIED DAILY RECORD HIGH MAXIMUM TEMP OF 93F;
ties the current record of 93F in 1921.
6/22 - TIED DAILY RECORD HIGH MINIMUM TEMP OF 69F;
ties the current record of 69F in 1892.
6/25 - NEW DAILY RECORD MAXIMUM PRECIPITATION OF 1.38 INS;
surpasses the previous record of 1.10 ins. in 2006.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JUNE 29
HIGH 93F IN 1933
LOW 42F IN 1919
PRECIP 1.60 INS IN 1889
PEAK GUST 49 MPH S IN 1957
 
RECORDS FOR JUNE 30
HIGH 94F IN 1964
LOW 47F IN 1919
PRECIP 3.04 INS IN 1921
PEAK GUST 51 MPH WNW IN 1957
 
TODAY'S REPORT PREPARED BY: George Tabeek