Wednesday, August 12, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, AUGUST 12, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

0.52 INCHES OF RAIN FALL TUESDAY, ANNUAL DEFICIT STILL
MORE THAN 4 INCHES

Yesterday’s steady rain petered out after 3:00 PM EST, with
a total of 0.52 inches falling. This created a daily departure
of 0.38 inches above normal, yet the month of August is still
0.70 inches below normal along with an annual deficit of 4.33
inches drier than normal.

Clear skies and an overnight low of 65F have slowly risen into
the 70s by mid morning with small cumulus building. By the 1:00
PM EST observation cumulus had grown and clustered somewhat with
partly sunny conditions. Visibility had increased to 70 miles
with light distant haze and a maximum temperature of 82F was reached.
Today’s Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 68F; Dew Point: 65F; Wind: WNW at 8 kts
Sea-level pressure: 29.78 ins. Hg, rising, then more quickly
Visibility: 25 miles, thin fog, hazy
6-hr Max temp: 69F
6-hr Min temp: 65F
24-hr precip: 0.52 inches
BHO SA 1155 200 SCT 25 084/68/65/2908/978/
THN FG ALQDS HAZY/ 8/001 53012 ASOS 70053 MANUAL 70052 10069 20065

10 A.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 77F; Dew Point 65F; Wind: estimated WNW at 6 kts,
Wind Speed: Light
Sea-level pressure: 29.80 ins. Hg, rising steadily
Visibility: 50 miles, light distant haze in all directions
BHO SA 1455 55 SCT 200 SCT 50 091/77/65/E3006/980/
LGT DSNT HZ ALQDS WND LGT/ 8/101 52007

1 P.M.
Weather: Scattered cumulus, broken cirrus
Temperature: 81F; Dew Point: 62F; Wind: W at 8 kts,
Sea-level pressure: 29.80 ins. Hg, falling then rising and higher
Visibility: 70 miles, light distant haze in all directions
6-hr Max temp: 82F
6-hr Min temp: 68F
BHO SA 1755 36 SCT E200 BKN 70 092/81/62/2808/980/
LGT DSNT HZ ALQDS/ 8/101 53001 10082 20068
SUMMARY FOR TUESDAY, AUGUST 11, 2015

TEMPERATURE (DEGREES F)
MAX…..70   NORMAL…..80
MIN…..63   NORMAL…..63
MEAN….67   NORMAL…..71

DEPARTURE FROM 30-YEAR NORMAL……………………-4
TOTAL DEPARTURE FOR THE MONTH……………………+3 [+0.1 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………2   DEPARTURE……….-5
TOTAL COOLING UNITS FOR THE MONTH…………..78   DEPARTURE……….+0
TOTAL COOLING UNITS FOR THE SEASON…………472   DEPARTURE………+43
TOTAL COOLING UNITS LAST SEASON TO DATE…….408   DIFFERENCE……..+64

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….32 SSE   AT   9:50 A.M.*
ASOS……………………36 S     AT  11:58 A.M.
DAVIS…………………..33 S     AT  11:57 P.M. RMY 35
FASTEST MILE FOR YESTERDAY…………………25 S     AT  12:39 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………24 S     AT  12:40 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..22 S     AT  12:40 P.M.
AVERAGE WIND SPEED AND DIRECTION………….14.8 S
ASOS………………….14.2
DAVIS…………………13.5 S [184 deg.] * Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.52  DEPARTURE…..+0.38
ASOS……………0.53
TOTAL PRECIPITATION FOR THE MONTH………..0.89  DEPARTURE…..-0.70
ASOS…………..0.91
TOTAL PRECIPITATION FOR THE YEAR………..28.25  DEPARTURE…..-4.33
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 70/63/67/-4/0.52/000/00               32 SSE RMY 35

8/12 low since midnight is 65F; normal low is now 62F

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 12
HIGH 99F IN 1944
LOW 48F IN 1930
PRECIP 1.89 INCHES IN 1979
PEAK GUST 50 MPH NE IN 1983

RECORDS FOR AUGUST 13
HIGH 98F IN 1944, 2002
LOW 47F IN 1902, 1957
PRECIP 2.92 INCHES IN 1989
PEAK GUST 52 MPH SSE IN 1963

TODAY’S REPORT PREPARED BY: Brian Fitzgerald