BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 26, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
 
WARM, HAZY, AND HUMID WITH SHOWERS DEVELOPING
 
Today has been another warm day, though not as hot as the previous 3, with
a maximum temperature recorded so far of 83F, and a high dew point making
it feel warmer than that.  The morning began with very hazy sunshine. 
Cumulus clouds began to develop by mid-morning and grew rapidly, allowing
for numerous showers to develop by noon.  The showers have mostly avoided
Blue Hill so far, with only 0.02 inches of rain recorded in a late morning
shower.  Winds have been light and variable for most of the day, with an
average speed of only 5-7mph since 7AM this morning.  Visibility has been
limited to 25 miles or less because of haze, and has occasionally been
lower in certain directions as showers move through and reduce visibility.
 
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 6/26)
5) 10.78 in 1922
 
Today's Observations:
 
7 A.M.
Weather: Scattered altocumulus, broken altocumulus, broken cirrus, few
cumulus fractus SE, few altocumulus lenticularis N-NNE, altocumulus
castellanus NW
Temperature: 75F; Dew Point: 68F; Wind: W at 6 kts,
Wind: Light and variable
Sea-level pressure: 29.79 ins. Hg, rising
Visibility: 15 miles, hazy
24-hr. precip: Trace
6-hour min. temp: 69F
BHO SA 1155 80 SCT E120 BKN 250 BKN 15 088/75/68/2706/979/ FEW CUFRA SE
FEW ACSL N-NNE ACC NW HAZY WND LGT/ 8/181 52007 MANUAL 7000/ 10075 20069
 
10 A.M.
Weather: Scattered cumulus, scattered cirrus, cumulus building, few
moderate cumulus, cirrostratus ENE-ESE and NW-N
Temperature: 82F; Dew Point: 69F; Wind: W at 4 kts,
Wind: Light and variable
Sea-level pressure: 29.80 ins. Hg, rising slowly
Visibility: 20 miles, hazy
BHO SA 1455 35 SCT 250 SCT 20 090/82/68/2904/980/ CU BLDG FEW MDT CU
CS ENE-ESE AND NW-N HAZY WND LGT/ 8/101 51002 
 
1 P.M.
Weather: Scattered cumulus, broken cumulus, broken altocumulus, moderate
cumulus all quadrants, cumulonimbus NW-NNE, cirrus visible SE-W, rain
showers distant NW-E
Temperature: 80F; Dew Point: 70F; Wind: N at 6 kts
Sea-level pressure: 29.78 ins. Hg, falling then rising
Visibility: 25 miles, except 15 miles NNW-NE, distant haze
6-hour max. temp: 83F
6-hr. precip: 0.02 ins.
BHO SA 1755 40 SCT E55 BKN 90 BKN 25 086/80/70/0106/978/ MDT CU ALQDS
CB NW-NNE HIER CI VSBL SE-W SHRA DSNT NW-E DSNT HZ VSBY NNW-NE 15 WND LGT
8/371 55004 MANUAL 60002 ASOS 60001 10083 20075
 
WEATHER SUMMARY FOR TUESDAY, JUNE 25, 2013
 
TEMPERATURE (DEGREES F)
MAX.....90     NORMAL.....78
MIN.....67     NORMAL.....60
MEAN....78     NORMAL.....69
 
DEPARTURE FROM 30-YEAR NORMAL...................+9
TOTAL DEPARTURE FOR THE MONTH...................+32 [+1.1 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........-591
TOTAL HEATING UNITS LAST SEASON TO DATE.....4983   DIFFERENCE.......+798
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...............32 W   AT  7:43 P.M.
                   AERO....................33 W   AT  7:43 P.M.
                   ASOS....................37 WSW AT  7:43 P.M.
                   DAVIS...................37 WSW AT  7:43 P.M. RMY 39
FASTEST MILE FOR YESTERDAY.................23 W   AT  7:46 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE..............22 WSW AT  7:48 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.............22 WSW AT  7:44 P.M.
AVERAGE WIND SPEED AND DIRECTION..........13.0 W
                   ASOS...................12.6
                   DAVIS..................11.7 WSW [247 deg]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace   DEPARTURE............-0.12
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH.........11.19   DEPARTURE............+7.45
                         ASOS.............11.25
TOTAL PRECIPITATION FOR THE YEAR..........31.28   DEPARTURE............+4.88
                         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 morning low temp: 69F; 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 26
HIGH 96F IN 1952
LOW 45F IN 1986
PRECIP 1.52 INS IN 1945
PEAK GUST 48 MPH N IN 1998
 
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
 
TODAY'S REPORT PREPARED BY: Jonathan O'Brien