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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, AUGUST 25, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

HAZE LIMITS VISIBILITY AND SOUTHWEST FLOW RAISES DEW POINTS

Skies were mostly cloudy all day with scattered cirrus turning into broken 
altocumulus and broken cirrus. Visibility was restricted to 40 miles due to 
hazy conditions. The offshore high pressure brought southwest flow and an 
increase in moisture with dew points in the low 60s. Atmospheric pressure 
continued to fall today as the offshore high pressure moved farther east. 
Gusty winds left us with a peak gust of 28 MPH by the 1:00PM EST observation. 

7 A.M. 
Weather: Few cumulus E-SE, few cirrostratus in all directions, scattered cirrus
Temperature: 70F; Dew Point: 64F; Wind: SSW at 11 kts
Sea-level pressure: 30.12 ins. Hg, rising, then falling
Visibility: 20 miles, distant fog
6-hr Max temp: 70F 
6-hr Min temp: 65F
24-hr precip: 0.00 in.
BHO SA 1155 250 SCT 20 199/70/64/2111/012/ FEW CU E-SE FEW CS ALQDS DSNT FG/
8/101 50004 10070 20065 

10 A.M.
Weather: Few cumulus in all directions, broken cirrus
Temperature: 80F; Dew Point: 62F; Wind: SSW at 13G20 kts,
Sea-level pressure: 30.09 ins. Hg, falling, then more quickly
Visibility: 40 miles, hazy
BHO SA 1455 E250 BKN 40 188/80/62/2113G20/009/ FEW CU ALQDS HAZY/ 8/101 58011

1 P.M.
Weather: Few cumulus E-N, broken altocumulus, broken cirrus
Temperature: 85F; Dew Point: 59F; Wind: SSW at 16G23 kts,
Sea-level pressure: 30.04 ins. Hg, falling, then more quickly
Visibility: 40 miles, hazy
6-hr Max temp: 86F
6-hr Min temp: 69F
BHO SA 1755 E180 BKN 250 BKN 40 174/85/59/2116G23/004/ FEW CU E-N HAZY/ 
8/132 58014 10086 20069

SUMMARY FOR WEDNESDAY, AUGUST 24, 2016 
 
TEMPERATURE (DEGREES F)
MAX.....87   NORMAL.....78
MIN.....62   NORMAL.....61 
MEAN....75   NORMAL.....70

DEPARTURE FROM 30-YEAR NORMAL........................+5
TOTAL DEPARTURE FOR THE MONTH.......................+98 [+3.9 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............10   DEPARTURE..........+5
TOTAL COOLING UNITS FOR THE MONTH.............245   DEPARTURE.........+91
TOTAL COOLING UNITS FOR THE SEASON............719   DEPARTURE........+214
TOTAL COOLING UNITS LAST SEASON TO DATE.......608   DIFFERENCE.......+111   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................22 W   AT   1:14 P.M. 
                   AEROVANE....................18 W   AT   1:14 P.M. 
                   ASOS........................21 W   AT   1:15 P.M.
                   DAVIS.......................18 W   AT   1:14 P.M.  RMY 20
FASTEST MILE FOR YESTERDAY.....................14 W   AT   7:01 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE..................15 SW  AT  11:58 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................14 SSW AT   7:01 P.M. 
AVERAGE WIND SPEED AND DIRECTION..............9.3 SW 
                   ASOS.......................9.6 
                   DAVIS......................8.5 SW [230 Deg.]
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.12
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.53  DEPARTURE......-1.72
                         ASOS..............1.52
TOTAL PRECIPITATION FOR THE YEAR..........24.72  DEPARTURE......-9.52
                         ASOS.............25.03
 
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1  75/65/70/-2/0.02/320/37                 21 NE  AERO 20 ENE RMY 20
8/2  71/63/67/-5/0.12/000/00                 16 ENE AERO 16 ENE RMY 16
8/3  81/60/71/-1/0.00/603/70                 18 S   AERO 16 S   RMY 17
8/4  86/61/74/+2/0.00/833/97                 23 S   AERO 22 S   RMY 17 
8/5  87/61/74/+2/0.00/823/96                 29 S   AERO 29 S   RMY 30 
8/6  88/67/78/+6/T/419/49                    24 SSW AERO 23 SSW RMY 23   
8/7  89/65/77/+5/0.00/784/92                 26 WNW AERO 25 WNW RMY 26
8/8  87/63/75/+3/0.00/816/96                 23 W   AERO 21 W   RMY 22
8/9  90/65/78/+6/0.00/789/93                 25 SSW AERO 24 SSW RMY 25
8/10 76/66/71/+0/0.28/017/02                 30 SSW AERO 31 SSW RMY 33
8/11 93/73/83/+12/T/666/79                   22 SSW AERO 21 SSW RMY 22
8/12 95/74/85/+14/0.00/487/58                30 SW  AERO 30 SW  RMY 31 
8/13 77/67/72/+1/0.16/201/24                 25 NNW AERO 36 NNW RMY N/A TSTM
8/14 94/69/82/+11/0.39/701/84                39 SSW AERO 40 SSW RMY N/A TSTM
8/15 89/68/79/+8/0.00/758/91                 25 W   AERO 24 W   RMY 28
8/16 83/69/76/+5/0.02/125/15                 31 S   AERO 30 S   RMY N/A
8/17 84/68/76/+5/0.00/679/82                 38 W*  AERO 35 W   RMY 39
8/18 89/65/77/+6/T/635/77                    22 SW  AERO 20 SW  RMY 21 
8/19 86/68/77/+7/0.00/674/82                 17 S   AERO 16 SSE RMY 17  
8/20 86/65/76/+6/0.00/754/92                 25 S   AERO 23 S   RMY 25
8/21 87/63/75/+5/0.54/727/89                 25 S   AERO 22 SSE RMY N/A
8/22 78/59/69/-1/0.00/.../..                 31 NW  AERO 29 NW  RMY 32
8/23 80/54/67/-3/0.00/.../..                 23 WSW AERO 21 WSW RMY 23
8/24 87/62/75/+5/0.00/.../..                 22 W   AERO 18 W   RMY 20

8/25 Low temp since midnight is 65F; normal low is now 61F

DAILY RECORDS FOR AUGUST 2016
8/11/16: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 73F,
         TIES PREVIOUS RECORD SET IN 1900 AND 1988

8/12/16: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 74F,
         TIES PREVIOUS RECORD SET IN 1988

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated): 

RECORDS FOR AUGUST 25
HIGH 93F IN 1947, 1948, 2007 
LOW 41F IN 1940
PRECIP 2.69 INCHES IN 2010 
PEAK GUST 60e MPH SSW IN 1941

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

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle and Lizzy Suzedell