BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARIES
TUESDAY, JULY 12, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

WINDS SHIFT SOUTHWEST AS HIGH PRESSURE BEGINS TO MOVE OFFSHORE

Temperatures rose quickly this morning, reaching 80F at the 10:00AM
EST observation.  The maximum temp. by 1:00PM EST was 85F.  Dew points
remained in the 50s and created large dew point spreads as temperatures
rose.  These dry conditions are not expected to last as southwest winds 
are due to bring hot and humid conditions to the area.


Today's Observations:

7 A.M. 
Weather: Scattered cirrus
Temperature: 68F; Dew Point: 59F; Wind: W at 7 kts 
Sea-level pressure: 30.13 ins. Hg, rising unsteadily
Visibility: 40 miles
6-hr Max temp: 68F 
6-hr Min temp: 60F
24-hr precip: 0.00 in.
BHO SA 1155 250 SCT 40 202/68/59/2807/013/ 8/002 51013 10068 20060

10 A.M.
Weather: Few cumulus in all directions, scattered cirrus
Temperature: 80F; Dew Point: 56F; Wind: SW at 8G14 kts
Sea-level pressure: 30.12 ins. Hg, falling, then more slowly
Visibility: 70 miles, distant haze
BHO SA 1455 250 SCT 70 201/80/56/2308G14/012/ FEW CU ALQDS DSNT HZ/ 
8/101 58001 

1 P.M.
Weather: Few cumulus SW-SE, scattered cirrus
Temperature: 85F; Dew Point: 48F; Wind: SSW at 9G18 kts
Sea-level pressure: 30.06 ins. Hg, falling, then more slowly
Visibility: 70 miles, distant haze
6-hr Max temp: 85F 
6-hr Min temp: 68F
BHO SA 1755 250 SCT 70 181/85/48/2109G18/006/ FEW CU SW-SE DSNT HZ/ 
8/102 58020 10085 20068
 
SUMMARY FOR MONDAY, JULY 11, 2016 
 
TEMPERATURE (DEGREES F)
MAX.....77   NORMAL.....81
MIN.....56   NORMAL.....63 
MEAN....67   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL........................-5
TOTAL DEPARTURE FOR THE MONTH.......................-20 [-1.6 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............2   DEPARTURE..........-5
TOTAL COOLING UNITS FOR THE MONTH..............58   DEPARTURE.........-13
TOTAL COOLING UNITS FOR THE SEASON............215   DEPARTURE.........+15
TOTAL COOLING UNITS LAST SEASON TO DATE.......209   DIFFERENCE.........+6   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................20  NNE  AT  9:13 A.M. 
                   ASOS........................19  ENE  AT  9:13 A.M.      
                   DAVIS.......................17  NE   AT  9:12 A.M. RMY 20
FASTEST MILE FOR YESTERDAY.....................11  NNE  AT  9:57 A.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE..................14  NE   AT  9:14 A.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE.................12  NNE  AT  9:14 A.M.      
AVERAGE WIND SPEED AND DIRECTION..............6.5  W
                   ASOS.......................7.0
                   DAVIS......................6.0  W [270 Deg.]
*Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.64  DEPARTURE......-0.61
                         ASOS..............0.60
TOTAL PRECIPITATION FOR THE YEAR..........22.33  DEPARTURE......-5.89
                         ASOS.............22.72
 
PRELIMINARY CLIMATE SUMMARY FOR JULY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY:  R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
                                     
7/1  84/67/76/+6/0.20/520/57                 32 S   AERO 35 S   RMY 34 TSTM 
7/2  76/61/69/-1/0.00/811/91                 31 W   AERO 34 W   RMY 32 
7/3  83/57/70/-1/0.00/766/84                 23 W   AERO 23 W   RMY 23
7/4  87/61/74/+3/0.00/847/93                 28 SSW AERO 28 SSW RMY 28
7/5  80/65/73/+2/0.29/309/34                 16 S   AERO 16 S   RMY N/A
7/6  92/68/80/+9/0.00/864/95                 22 WSW AERO 24 WSW RMY 22
7/7  77/61/69/-2/0.00/.../..                 21 NE  AERO 20 ENE RMY N/A
7/8  67/58/63/-9/0.02/000/00                 25 NE  AERO 25 NE  RMY 26 
7/9  64/57/61/-11/0.09/000/00                20 NE  AERO 18 NE  RMY 17
7/10 66/56/61/-11/0.04/.../..                16 NE  AERO 16 NE  RMY 16
7/11 77/56/67/-5/0.00/.../..                 20 NNE AERO 21 NNE RMY 20

7/12 low temp since midnight is 60F; normal low is now 63F

DAILY RECORDS FOR JULY 2016
None so far.
     
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated): 

RECORDS FOR JULY 12
HIGH 97F IN 1943
LOW 48F IN 1945
PRECIP 1.43 INS IN 1975
WIND 48e MPH SSW IN 1944

RECORDS FOR JULY 13
HIGH 95F IN 1894
LOW 52F IN 1888, 1895, 1939, 1973
PRECIP 3.54 INS IN 1996
WIND 55 MPH SE IN 1996

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle