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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JULY 7, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

TEMPS DROP AS MORNING BACKDOOR COLD FRONT PASSES, THUNDERSTORMS
AND RAIN SHOWERS REMAIN AT BAY

The passage of this morning's cold front brought NE-E winds and a 
decrease of about 10F resulting in the morning low temperature of
61F.  The maximum temp. of 76F at 1:00PM EST was 4F below normal.

Visibility was slow to increase today due to the morning fog 
and distant haze.  Skies were also slow to clear as the thick fog 
and low stratus burned off.  Rain showers had not yet occurred at
the observatory by the 1:00PM observation, but moderate cumulus were
observed forming in the south.


Today's Observations:

7 A.M. 
Weather: Fog
Temperature: 62F; Dew Point: 61F; Wind: ENE at 9 kts
Sea-level pressure: 29.84 in. Hg, falling, then rising
Visibility: 1/8 mile
6-hr Max temp: 74F 
6-hr Min temp: 61F
24-hr precip: 0.00 in.
BHO SA 1155 W3 X 1/8F 104/62/61/0609/984/ 8//// 53005 10074 20061

10 A.M.
Weather: Scattered stratus, scattered altostratus, broken cirrus
Temperature: 69F; Dew Point: 61F; Wind: estimated ENE at 6 kts,
Wind Speed: Light
Sea-level pressure: 29.84 in. Hg, rising, then falling
Visibility: 10 miles, distant fog
BHO SA 1455 3 SCT 160 SCT 250 BKN 10 106/69/61/E0706/984/ DSNT FG
WND LGT/ 8/612 50002

1 P.M.
Weather: Few moderate cumulus forming S, scattered altostratus, 
scattered cirrus
Temperature: 76; Dew Point: 63F; Wind: estimated ESE at 6 kts,
Wind Speed: Light
Sea-level pressure: 29.80 in. Hg, steady, then falling
Visibility: 20 miles, distant haze
6-hr Max temp: 76F 
6-hr Min temp: 61F
BHO SA 1755 140 SCT 250 SCT 20 091/76/63/E1206/980/ FEW MDT CU FRMG S 
DSNT HZ WND LGT/ 8/211 58015 10076 20061

SUMMARY FOR WEDNESDAY, JULY 6, 2016 
 
TEMPERATURE (DEGREES F)
MAX.....92   NORMAL.....80
MIN.....68   NORMAL.....62 
MEAN....80   NORMAL.....71

DEPARTURE FROM 30-YEAR NORMAL.........................+9
TOTAL DEPARTURE FOR THE MONTH........................+18 [+2.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............15   DEPARTURE..........+8
TOTAL COOLING UNITS FOR THE MONTH..............52   DEPARTURE.........+15
TOTAL COOLING UNITS FOR THE SEASON............209   DEPARTURE.........+43
TOTAL COOLING UNITS LAST SEASON TO DATE.......171   DIFFERENCE........+38   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................22 WSW AT  3:15 P.M.
                   ASOS........................23 W   AT  2:59 P.M.     
                   DAVIS.......................21 WSW AT  2:58 P.M. RMY 22
FASTEST MILE FOR YESTERDAY.....................16 W   AT  3:18 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE..................16 W   AT  3:18 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE.................15 WSW AT  3:17 P.M.     
AVERAGE WIND SPEED AND DIRECTION..............9.7 WSW
                   ASOS......................10.1
                   DAVIS......................8.6 WSW [250 Deg.]
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.11
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.49  DEPARTURE......-0.16
                         ASOS..............0.46
TOTAL PRECIPITATION FOR THE YEAR..........22.18  DEPARTURE......-5.44
                         ASOS.............22.58
 

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/.../..                 32 S   AERO 35 S   RMY 34 TSTM 
7/2  76/61/69/-1/0.00/.../..                 31 W   AERO 34 W   RMY 32 
7/3  83/57/70/-1/0.00/.../..                 23 W   AERO 23 W   RMY 23
7/4  87/61/74/+3/0.00/.../..                 28 SSW AERO 28 SSW RMY 28
7/5  80/65/73/+2/0.29/.../..                 16 S   AERO 16 S   RMY N/A
7/6  92/68/80/+9/0.00/.../..                 22 WSW AERO 24 WSW RMY 22

7/7 low temp since midnight is 61F; normal low now 62F

DAILY RECORDS FOR JUNE 2016
None

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 7
HIGH 97F IN 1908,1993
LOW 48F IN 1902
PRECIP 2.11 INS IN 1966
PEAK GUST 55 MPH NW IN 1989

RECORDS FOR JULY 8
HIGH 95F IN 1981
LOW 50F IN 1919
PRECIP 1.74 INS IN 1916
PEAK GUST 46e SSW IN 1941

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle