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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 21, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

EARLY MORNING THUNDERSTORM BRINGS MORNING RAIN AND FOG

An early morning thunder storm dropped 0.40 in. of rain making the month's
departure 1.69 in. below normal.  The year's departure is still high at 
4.28 in. below normal.  

Visibility was decreased to 10 miles due to fog at the 7:00AM EST ob. but
increased to 70 miles by 1:00PM.  Humidity dropped throughout the day from
97% in the morning to 41% by 1:00PM.

Temperatures rose quickly during the late morning reaching a max. of 82F
by 1:00PM.  The overnight low was 61F, 2F above normal.  


Today's Observations:

7 A.M. 
Weather: Few cumulus fractus in all directions, broken altostratus, 
overcast cirrostratus, breaks in overcast, fog in all directions
Temperature: 65F; Dew Point: 64F; Wind: SW at 14G19 kts
Sea-level pressure: 29.79 in. Hg, rising, then falling
Visibility: 10 miles
6-hr Max temp: 65F 
6-hr Min temp: 61F
24-hr precip: 0.40 in.
BHO SA 1155 E120 BKN 160 OVC 10 087/65/64/2214G19/979/ 
FEW CU FRA ALQDS BINOVC FG ALQDS/ 8/717 53009 ASOS 70043 
MANUAL 70040 10065 20061

10 A.M.
Weather: Scattered altocumulus, scattered cirrus
Temperature: 75F; Dew Point: 65F; Wind: WSW at 10 kts
Sea-level pressure: 29.77 in. Hg, falling, then more quickly
Visibility: 40 miles
BHO SA 1455 160 SCT 250 SCT 40 080/75/65/2410/977/ 8/081 55004

1 P.M.
Weather: Few cumulus in all directions, scattered cirrus
Temperature: 82F; Dew Point: 55F; Wind: W at 14G23 kts
Sea-level pressure: 29.72 in. Hg, falling, then more quickly
Visibility: 70 miles
6-hr Max temp: 82F
6-hr Min temp: 65F
BHO SA 1755 200 SCT 70 066/82/55/2614G23/972/ FEW CU ALQDS/ 
8/101 58014 10082 20065

SUMMARY FOR MONDAY, JUNE 20, 2016 
 
TEMPERATURE (DEGREES F)
MAX.....81   NORMAL.....76
MIN.....57   NORMAL.....59 
MEAN....69   NORMAL.....68

DEPARTURE FROM 30-YEAR NORMAL.........................+1
TOTAL DEPARTURE FOR THE MONTH........................+14 [+0.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE..........-2
TOTAL HEATING UNITS FOR THE MONTH..............34   DEPARTURE.........-30
TOTAL HEATING UNITS FOR THE SEASON...........5282   DEPARTURE.......-1084
TOTAL HEATING UNITS LAST SEASON TO DATE......6491   DIFFERENCE......-1209

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............4   DEPARTURE...........0
TOTAL COOLING UNITS FOR THE MONTH..............42   DEPARTURE.........-13
TOTAL COOLING UNITS FOR THE SEASON.............90   DEPARTURE.........+11
TOTAL COOLING UNITS LAST SEASON TO DATE........98   DIFFERENCE.........-8   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................25 S   AT  10:28 P.M. 
                   ASOS........................27 SSW AT  10:29 P.M.   
                   DAVIS.......................25 S   AT   4:00 P.M. RMY 27
FASTEST MILE FOR YESTERDAY.....................20 S   AT   4:49 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE..................21 SSW AT  10:29 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE.................19 S   AT  10:29 P.M.  
AVERAGE WIND SPEED AND DIRECTION..............14.3 s
                   ASOS.......................15.0
                   DAVIS......................13.3 S [180 Deg.]
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.40  DEPARTURE......+0.27
                         ASOS..............0.43
TOTAL PRECIPITATION FOR THE MONTH..........1.45  DEPARTURE......-1.69
                         ASOS..............1.51
TOTAL PRECIPITATION FOR THE YEAR..........21.52  DEPARTURE......-4.28
                         ASOS.............21.95
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

6/1  71/54/63/+1/0.00/860/95                 26 NE  AERO 30 NE  RMY N/A
6/2  68/54/61/-1/0.00/444/49                 21 NE  AERO 22 NE  RMY 21
6/3  70/57/64/+2/T/173/19                    16 SSW AERO 17 SSW RMY 16
6/4  81/61/71/+8/0.00/491/54                 18 S   AERO 21 S   RMY 20
6/5  67/60/64/+1/0.76/000/00                 32 SSE AERO 36 SSE RMY 34  
6/6  80/63/72/+9/0.00/747/82                 26 W   AERO 28 W   RMY 27 
6/7  83/58/71/+7/0.18/602/66                 32 WNW AERO 36 WNW RMY 33 TSTM 
6/8  72/52/62/-2/0.05/684/75                 37 WNW AERO 41 WNW RMY 38 TSTM
6/9  67/48/58/-6/0.00/466/51                 41 WNW AERO 45 WNW RMY 40
6/10 71/50/61/-4/0.00/841/92                 25 W   AERO 28 W   RMY 26
6/11 68/52/60/-5/0.06/.../..                 30 SSW AERO 35 SSW RMY 31
6/12 76/51/64/-1/T/.../..                    41 W   AERO 48 W   RMY 42
6/13 70/49/60/-5/0.00/.../..                 36 NW  AERO 46 NW  RMY 38
6/14 77/50/64/-2/0.00/.../..                 32 NNW AERO 38 NNW RMY 33
6/15 83/60/72/+6/0.00/.../..                 22 NW  AERO 26 NW  RMY 25
6/16 82/62/72/+6/0.00/.../..                 26 E   AERO 28 E   RMY 27
6/17 77/59/68/+1/T/.../..                    25 E   AERO 28 E   RMY 23 TSTM
6/18 75/55/65/-2/0.00/.../..                 22 SSW AERO 24 SSE RMY N/A
6/19 79/55/67/+0/0.00/.../..                 32 S   AERO 35 S   RMY 36
6/20 81/57/69/+1/0.00/.../..                  25 S   AERO 28 S   RMY 27

6/21 low temp since midnight is 61F; normal low now 59F

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

RECORDS FOR JUNE 21
HIGH 94F IN 2012
LOW 42F IN 1940
PRECIP 1.40 INS 1903
PEAK GUST 51 MPH SSW IN 2000

RECORDS FOR JUNE 22
HIGH 93F IN 1921, 2012
LOW 43F IN 1940
PRECIP 1.57 INS IN 1900
PEAK GUST 74 MPH NW IN 1988

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle