BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 26, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
 
WARMER AND MUCH MORE HUMID AIR ARRIVES TODAY
VERY LIGHT SHOWERS 8-9 A.M. EDT LEAVE GROUND DRY 
DRY SPELL CONTINUES THROUGH 16 DAYS
 
A large high pressure system brought pleasant dry
weather with rising temperatures on Sunday. The
center of highest pressure passed over the region
Sunday morning with our barometric pressure reaching
close to 30.40 inches at 10:20 A.M. EDT.
After a maximum of 82 degrees Sunday afternoon the
temperature fell rapidly for a short time early
last evening (6 degrees) from 79 to 73 degrees in
hour.  Readings leveled off in the mid 60's overnight
and were quite a bit milder than the 55 and 57-degree
reading Saturday and Sunday morning respectively.  An un-
usually chilly minimum temperature of 42 degrees was
recorded at Martha’s Vineyard Airport early Sunday.
 
The arrival of warmer and especially more humid weather
today was borne by increasing southwest winds with
gusts reaching close to 30 MPH by early afternoon.
The dew point had risen to the lower 60's. There
was a very minimal trace of rainfall with the change
of air mass early today.
 
Today's Observations:
 
7 A.M. 
Weather: Broken altostratus/altocumulus, overcast altocumulus,
dark sky WSW-N, bright spots in overcast distant NE-ESE,
small bright spot in overcast distant W, showers of rain WSW-N,
light rain shower began 6:57 A.M. EST very light
Temperature: 65F; Dew Point: 58F; Wind: SW at 8 kts
Sea-level pressure: 30.12 ins. Hg, falling then more slowly
Visibility: 30 miles, light distant haze
6-hr min. temp: 64
6-hr  rainfall: trace
24-hr rainfall: trace
BHO SA 1155 E75 BKN 90 OVC 30 199/65/58/2308/012/ DRK WSW-N
BRGHT SPTS IOVC DSNT NE-ESE SHRA WSW-N MOVG SE LGT HZ/ 8/07/
56011 MANUAL 6000/ 10065 20064 
 
10 A.M.
Weather: Overcast stratocumulus, thin spots in overcast overhead,
break in overcast vicinity WSW-W, higher altocumulus clouds visible
Temperature: 70F; Dew Point: 59F; Wind: SSW at 11 kts,
Sea-level pressure: 30.07 ins. Hg, falling steadily
Visibility: 35 miles, except 25 miles NE-SE, light distant haze
3-hr precip: trace   
BHO SA 1455 E60 OVC 35 182/70/59/2111/007/ OVC PTLY THN OVHD BINOVC
HIER CLD VSB VC WSW-W VSBY LWR NE-SE LGT HZ AND DSNT HZ/ 8/53/
57017 MANUAL 6000/
 
1 P.M.
Weather: Scattered altocumulus of a chaotic sky, broken dense
cirrus (overhead-south-northwest) broken cirrus mostly thin,
few stratocumulus and stratocumulus lenticularis N-NE 
Temperature: 75F; Dew Point: 60F; Wind: WSW at 13G21 kts,
Wind: Direction variable SSW-W
Sea-level pressure: 30.00 ins. Hg, falling then falling more slowly
Visibility: 25 miles, hazy all quadrants
6-hr max. temp: 80F
6-hr precip: trace 
BHO SA 1755 80 SCT 100 SCT E200 BKN 250 BKN 25 158/75/60/2413G21/000/
FEW SC/SCSL N-NE AC CHAOTIC ALQDS DNS CI OVHD-S-NW WND 20V28/
8/592 56024 10080 20065
 
WEATHER SUMMARY FOR SUNDAY, AUGUST 25, 2013
 
TEMPERATURE (DEGREES F)
MAX.....82     NORMAL.....78
MIN.....57     NORMAL.....61
MEAN....70     NORMAL.....69
 
DEPARTURE FROM 30-YEAR NORMAL.......................+1
TOTAL DEPARTURE FOR THE MONTH......................-33  [-1.5 DEGREES/DAY]
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............5   DEPARTURE..........0
TOTAL COOLING UNITS FOR THE MONTH............121   DEPARTURE........-38
TOTAL COOLING UNITS FOR THE SEASON...........604   DEPARTURE........+94
TOTAL COOLING UNITS LAST SEASON TO DATE......675   DIFFERENCE.......-71
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY................20 SW   AT   8:43 P.M.
                   AERO.....................21 SW   AT   8:43 P.M.
                   ASOS.....................22 SW   AT   8:43 P.M.
                   DAVIS....................20 SW   AT   8:43 P.M. RMY: 21
FASTEST MILE FOR YESTERDAY..................16 SW   AT   8:42 P.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE...............16 SW   AT   9:10 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..............16 SSW  AT   8:38 P.M.
AVERAGE WIND SPEED AND DIRECTION...........9.3 SW 
                   ASOS....................9.2
                   DAVIS...................8.3 WSW [240 deg.]
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M... Trace  DEPARTURE............-0.11
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........2.55   DEPARTURE............-0.81
                         ASOS..............2.60
TOTAL PRECIPITATION FOR THE YEAR..........37.84   DEPARTURE............+3.49
                         ASOS..............N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals 
     
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
8/1  81/62/72/0/0.01/503/58          25 S   AERO 26 MPH S   RMY 27
8/2  81/62/72/0/0.23/518/60          26 W   AERO 26 MPH W   RMY 28
8/3  77/63/70/-2/T/276/32            22 WSW AERO 23 MPH WSW RMY 23
8/4  79/58/69/-3/T/645/75            25 WNW AERO 21 MPH WNW RMY 26
8/5  75/54/65/-7/0.00/858/100        26 WNW AERO 25 MPH WNW RMY 27
8/6  78/56/67/-5/0.00/846/99         17 ESE AERO 15 MPH S   RMY 16
8/7  80/59/70/-2/0.00/759/89         21 S   AERO 21 MPH S   RMY N/A
8/8  79/62/71/-1/0.08/153/18         25 S   AERO 25 MPH S   RMY N/A
8/9  73/70/72/0/2.21/000/00          37 S   AERO 39 MPH S   RMY 40
8/10 81/61/71/-1/0.00/795/94         30 WNW AERO 31 MPH WNW RMY 31
8/11 78/58/68/-3/0.00/835/99         18 W   AERO 18 MPH W   RMY 21
8/12 81/62/72/+1/0.00/656/78         18 W   AERO 17 MPH WSW RMY 19
8/13 73/64/69/-2/0.02/193/23         16 SSE AERO 15 MPH SSE RMY N/A
8/14 73/57/65/-6/0.00/819/98         35 W   AERO 35 MPH W   RMY 35
8/15 75/53/64/-7/0.00/800/96         23 W   AERO 23 MPH W   RMY 24
8/16 77/57/67/-4/0.00/740/89         20 W   AERO 19 MPH W   RMY 21
8/17 77/59/68/-3/0.00/770/93         18 W   AERO 18 MPH W   RMY N/A
8/18 80/62/71/0/T/231/28             16 SSW AERO 17 MPH SSW RMY 18
8/19 82/58/70/0/T/494/60             17 W   AERO 18 MPH W   RMY 20
8/20 85/64/75/+5/0.00/772/94         17 NW  AERO 18 MPH NW  RMY N/A
8/21 87/65/76/+6/0.00/802/98         18 WSW AERO 18 MPH WSW RMY 18
8/22 84/67/76/+6/0.00/432/53         22 SW  AERO 22 MPH SSW RMY N/A
8/23 78/63/70/0/0.00/.../..          25 NNW AERO 25 MPH NNW RMY 24
8/24 73/55/64/-6/0.00/.../..         23 NNE AERO 22 MPH NNE RMY N/A
8/25 82/57/70/+1/0.00/.../..         20 SW  AERO 21 MPH SW  RMY 21 
 
8/26 6morning low temp: 64F; the normal low is now 61F
 
DAILY RECORDS FOR AUGUST 2013
None so far.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR AUGUST 26
HIGH 96F IN 1900, 1948
LOW 46F IN 1885
PRECIP 5.85 INCHES IN 1924
PEAK GUST 55e MPH NNW IN 1947
 
RECORDS FOR AUGUST 27
HIGH 99F IN 1948
LOW 44F IN 1885
PRECIP 2.77 INCHES IN 1946
PEAK GUST 48 MPH NW IN 1983
 
TODAY'S REPORT PREPARED BY: Robert Skilling