BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
WEDNESDAY, JUNE 19, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
 
THUNDERSTORM AGAIN BRINGS AFTERNOON DOWNPOUR YESTERDAY
SUNNY, SLIGHTLY COOLER BUT MUCH DRIER TODAY
 
Tuesday afternoon's thunderstorm brought a downpour of rain
which amounted to 0.44 inch in the hour ending at 7 P.M. EDT
This was far short of Monday's deluge which dropped excessive
rainfall amounts of 0.39 inch in 5 minutes, 0.60 inch in 10
minutes, 0.84 inch in 15 minutes, and 0.99 in 20 minutes,
all according to the ASOS system.  The 60 minute maximum
was 1.19 ins. ending at 7 P.M. EDT. 
 
Sunny and slightly cooler, but much drier weather is occurring
today but with increasing haze limiting visibility to 30 miles
by early this afternoon. 
 
June has now moved into 4th place wettest with 11.13 inches.
 
BHO Wettest Junes, inches (1886-2013)
1) 17.32 in 1998
2) 13.73 in 1982
3) 12.31 in 2006
4) 11.13 in 2013 (through 6/18)
5) 10.78 in 1922
6) 10.55 in 2013 
7)  9.03 in 1938
8)  8.77 in 1931
9)  8.64 in 1920
10) 8.02 in 1959
 
Today's Observations:
 
7 A.M.
Weather:  Scattered cirrocumulus/cirrus/few dense cirrus,
thin overcast cirrus, few stratocumulus slowly dissipating,
break in overcast/line of clearing WNW-NNE
Temperature: 59F; Dew Point: 56F; Wind: N at 8 kts
Sea-level pressure: 29.96 ins. Hg, rising then more slowly
Visibility: 35 miles, except 45 miles WNW, thin fog and hazy
24-hr precip: 0.58 inch
6-hr precip: trace
6-hr min. temp: 53F
BHO SA 1155 220 SCT 250 –OVC 35 147/59/56/3508/996/ FEW SC SLWLY DSSPTG
ALQDS CC/DNS CI PRSNT LINE OF CLRG XTDNG WNW-NNE THN FHZ VSBY WNW 45/
8/509 53014 MANUAL 6000/ MANUAL 70058 ASOS 70058 10059 20053
 
10 A.M.
Weather: Scattered cirrus, cumulus forming except overhead-N-SE,
few moderate cumulus foaming S-SW, cirrus layer extending E-SW,
few cirrocumulus vicinity station S
Temperature: 67F; Dew Point: 48F; Wind: NNE at 8 kts
Sea-level pressure: 30.02 ins. Hg, rising slightly
Visibility: 35 miles, except 40 miles WNW, hazy 
BHO SA 1455 250 SCT 35 167/67/48/0308/002/ CU FRMG XCPT OVHD-N-SE FEW
MDT CU FRMG S-SW CI LYR XTDNG E-SW FEW CC VC S VSBY WNW 40 HAZY ALQDS/
8/201 51020
 
1 P.M.
Weather: Scattered cumulus, stratocumulus cumulogenitus, and
altocumulus cumulogenitus, scattered cirrus (distant ESE-SSE)
Temperature: 70F; Dew Point: 47F; Wind: E at 7 kts,
Wind: Direction variable N-E
Sea-level pressure: 30.03. Hg, rising slightly
Visibility: 30 miles, hazy, haze increasing
6-hr max. temp: 71F 
BHO SA 1755 45 SCT 65 SCT 250 SCT 30 171/70/47/0807/003/
FEW MDT CU SCCU/ACCU ALQDS HAZY HZ INCRSNG WND 01V10/
8/461 53004 10071 20059
 
WEATHER SUMMARY FOR TUESDAY, JUNE 18, 2013
 
TEMPERATURE (DEGREES F)
MAX.....74     NORMAL.....76
MIN.....56     NORMAL.....58
MEAN....65     NORMAL.....67
 
DEPARTURE FROM 30-YEAR NORMAL....................-2
TOTAL DEPARTURE FOR THE MONTH....................+6 [+0.1 DEGREE/DAY]
 
HEATING DEGREE DAYS 
TOTAL HEATING UNITS FOR YESTERDAY..............0   DEPARTURE..........-2
TOTAL HEATING UNITS FOR THE MONTH.............44   DEPARTURE.........-16
TOTAL HEATING UNITS FOR THE SEASON..........5778   DEPARTURE........-585
TOTAL HEATING UNITS LAST SEASON TO DATE.....4981   DIFFERENCE.......+797
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...............32 ENE AT  2:08 P.M.
                   AERO....................32 ENE AT  2:08 P.M. 
                   ASOS....................33 ENE AT  2:19 P.M.
                   DAVIS...................32 NE  AT  2:09 P.M. RMY 33
FASTEST MILE FOR YESTERDAY.................24 ENE AT  2:21 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE..............24 ENE AT  2:22 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.............23 NE  AT  2:22 P.M.
AVERAGE WIND SPEED AND DIRECTION..........7.6 NE
                   ASOS...................7.5
                   DAVIS..................7.4 NE [040 deg]
* Last of several occurrences. 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.58   DEPARTURE............+0.44
                         ASOS..............0.58
TOTAL PRECIPITATION FOR THE MONTH.........11.13   DEPARTURE............+8.27
                         ASOS.............11.20
TOTAL PRECIPITATION FOR THE YEAR..........31.22   DEPARTURE............+5.70
                         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/.../..         45 NW  AERO 51 MPH NW  RMY 48 TSTM
6/18 74/56/65/-2/0.61/.../..         32 ENE AERO 32 MPH ENE RMY 33 TSTM
 
6/19  morning low temp: 55F; the normal low is now 58F
 
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 19
HIGH 92F IN 1923
LOW 40F IN 1920
PRECIP 3.92 INS 1922
PEAK GUST 66e MPH NW IN 1940
 
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
 
TODAY'S REPORT PREPARED BY: Robert Skilling/ Marc Douglas