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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, AUGUST 11, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
 
A VERY WELCOME HALF INCH OF RAIN BY EARLY AFTERNOON
WITH THE ABSENCE OF RAIN THIS MONTH THERE HAS BEEN A LOT OF 
SUNSHINE...80 PERCENT SUNSHINE THROUGH 9 DAYS FIGURED SO FAR
 
Light rain became moderate to briefly heavy during by around noon with
close to 0.30 inch in the hour ending at 12 noon EST. The total by
2 P.M. EDT was 0.50 inch in the standard gage with just very light
rain occurring. Temperatures were edging up to 68 degrees with a
68-degree dew point.
It's been an amazingly sunny month with 80% of the possible sun-
shine through the first 9 days.
 
Today's Observations:

7 A.M.
Weather: Scattered stratocumulus, broken stratocumulus,
overcast altocumulus/altostratus, few altocumulus castellanus E,
small break in overcast distant ENE-ESE, light rain shower,
precipitation very light 
Temperature: 65F; Dew Point: 63F; Wind: SSE at 16G24 kts
Sea-level pressure: 29.94 ins. Hg, falling slightly 
Visibility: 20 miles, light rain shower
6-hr Max temp: 65F
6-hr Min temp: 63F
24-hr precip: trace
BHO SA 1155 28 SCT E40 BKN 110 OVC 20RW- 139/65/63/1516G24/994/
FEW ACC E BINOVC DSNT ENE-ESE RB20E22B40 PCPN VRY LGT/ 8/58/
58008 MANUAL 6000/ 10065 20063 
 
10 A.M.
Weather: Light rain and fog with overcast stratus fractus,
ceiling ragged, stratus drifting over and below summit
Temperature: 66F; Dew Point 66F; Wind: SSE at 14G26 kts,
Wind: Peak wind SSE at 26 kts at 53 past hour
Sea-level pressure: 29.89 ins. Hg, falling then more rapidly 
Visibility: 2 miles, variable 1 to 2.5 miles, light rain and fog 
3 hr precip: 0.10 inch
BHO SA 1455 E3 OVC 2VR-F 122/66/66/1514G26/989/ CIG RGD STFRA
DRFTG OVR/BLO SMT VSBY 1V21/2 LWRG PK WND 1526/53/ 8/7//
58017 MANUAL 6010/ ASOS 60009
 
1 P.M.
Weather: Overcast stratus fractus, very light rain  
Temperature: 68F; Dew Point: 68F; Wind: S at 16G25 kts,
Wind: Peak wind from S at 27 kts at 37 past hour
Sea-level pressure: 29.82 ins. Hg, falling then more slowly 
Visibility: 12 miles, very light rain and thin fog
6-hr Max temp: 69F 
6-hr Min temp: 65F
6-hr precip: 0.50 inch
BHO SA 1755 E8 OVC 12R- 098/68/68/1916G25/982/ PCPN VRY LGT
PK WND 1827/37/ 8/7// 56024 MANUAL 6050/ ASOS 60051 10069 20065
 
SUMMARY FOR MONDAY, AUGUST 10, 2015
  
TEMPERATURE (DEGREES F)
MAX.....84   NORMAL.....80
MIN.....58   NORMAL.....63
MEAN....71   NORMAL.....71

DEPARTURE FROM 30-YEAR NORMAL.........................0
TOTAL DEPARTURE FOR THE MONTH.......................+ 7 [+0.5 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............6   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE MONTH..............76   DEPARTURE.........+ 5
TOTAL COOLING UNITS FOR THE SEASON............470   DEPARTURE.........+48
TOTAL COOLING UNITS LAST SEASON TO DATE.......399   DIFFERENCE........+71

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................28 S     AT   6:13 P.M. *      
                   ASOS........................28 S     AT   6:14 P.M.    
                   DAVIS.......................27 SSW   AT   3:42 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY.....................21 S     AT   4:01 P.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE..................22 S     AT   4:02 P.M.      
MAXIMUM 2-MINUTE DAVIS AVERAGE.................21 S     AT   4:01 P.M.    
AVERAGE WIND SPEED AND DIRECTION.............10.8 SSW
                   ASOS......................10.9 
                   DAVIS..................... 9.5 SW [220 deg.]
* Last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....trace DEPARTURE.....-0.13
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........0.37  DEPARTURE.....-1.08
                          ASOS..............0.38
TOTAL PRECIPITATION FOR THE YEAR...........27.73  DEPARTURE.....-4.71
                        ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR AUGUST CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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
 
8/1  88/68/78/+6/0.06/729/84               28 WNW RMY N/A
8/2  86/62/74/+2/0.00/865/100              24 SW  RMY N/A
8/3  89/68/79/+7/0.00/690/80               31 S   RMY N/A 
8/4  86/66/76/+4/0.31/422/49               45 W   RMY 50  TSTM 
8/5  84/64/74/+2/0.00/765/89               28 WNW RMY 27
8/6  80/59/70/-2/0.00/685/80               22 W   RMY 21
8/7  78/61/70/-2/0.00/845/99               20 ESE RMY 18
8/8  77/58/68/-4/0.00/741/87               18 E   RMY N/A
8/9  72/59/66/-6/T/458/54                  27 NNE RMY 26  
8/10 84/58/71/0/0.00/.../..                28 S   RMY N/A
 
8/11 low since midnight is 63F; normal low is now 63F
 
DAILY RECORDS FOR AUGUST 2015
None so far.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR AUGUST 11
HIGH 97F IN 1944
LOW 49F IN 1972
PRECIP 3.13 INCHES IN 1990
PEAK GUST 44 MPH SW IN 1971
 
RECORDS FOR AUGUST 12
HIGH 99F IN 1944
LOW 48F IN 1930
PRECIP 1.89 INCHES IN 1979
PEAK GUST 50 MPH NE IN 1983
 
TODAY'S REPORT PREPARED BY: Robert Skilling