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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 29, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

COLD FRONT PASSES THROUGH LEAVING DRY AFTERNOON CONDITIONS

The passage of a cold front gave us 40 miles of visibility and dew points 
in the mid 60s during the morning observations. Visibility improved to 70 
miles and the wind direction shifted to the northwest after the cold front 
passed. Dew points dropped to the upper 50s by the 1:00PM EST observation, 
leaving us with another afternoon with high temperatures and low humidity.

7 A.M. 
Weather: Broken altostratus
Temperature: 70F; Dew Point: 64F; Wind: WSW at 11G16 kts
Sea-level pressure: 30.07 ins. Hg, falling, then rising
Visibility: 40 miles
6-hr Max temp: 70F 
6-hr Min temp: 66F
24-hr precip: 0.00 in.
BHO SA 1155 E74 BKN 40 184/70/64/2511G16/007/ 8/010 55002 10070 20066

10 A.M.
Weather: Few cumulus S-NNE, scattered altocumulus, scattered cirrus
Temperature: 82F; Dew Point: 64F; Wind: W at 10G18 kts
Sea-level pressure: 30.04 ins. Hg, falling, then more quickly 
Visibility: 40 miles
BHO SA 1455 170 SCT 250 SCT 40 175/82/64/2810G18/004/ FEW CU S-NNE/ 8/131 
58009

1 P.M.
Weather: Scattered cumulus, few cirrostratus ENE-SW
Temperature: 88F; Dew Point: 58F; Wind: WNW at 13G20 kts  
Sea-level pressure: 30.03 ins. Hg, falling, then less quickly
Visibility: 70 miles
6-hr Max temp: 88F
6-hr Min temp: 69F
BHO SA 1755 49 SCT 70 171/88/58/3013G20/003/ FEW CS ENE-SW/ 8/105 55004 
10088 20069
 
SUMMARY FOR SUNDAY, AUGUST 28, 2016 
 
TEMPERATURE (DEGREES F)
MAX.....86   NORMAL.....77
MIN.....66   NORMAL.....60 
MEAN....76   NORMAL.....69

DEPARTURE FROM 30-YEAR NORMAL........................+7
TOTAL DEPARTURE FOR THE MONTH......................+129 [+4.4 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............11   DEPARTURE..........+6
TOTAL COOLING UNITS FOR THE MONTH.............292   DEPARTURE........+119
TOTAL COOLING UNITS FOR THE SEASON............766   DEPARTURE........+242
TOTAL COOLING UNITS LAST SEASON TO DATE.......636   DIFFERENCE.......+130   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................25 SSE  AT   5:37 P.M.* 
                   AEROVANE....................20 SSE  AT   5:46 P.M. 
                   ASOS........................25 S    AT   5:38 P.M.  
                   DAVIS.......................24 SSE  AT   5:03 P.M. RMY 27
FASTEST MILE FOR YESTERDAY.....................18 SSE  AT   5:45 P.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE..................18 S    AT   5:38 P.M. 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................17 SSE  AT   5:34 P.M. 
AVERAGE WIND SPEED AND DIRECTION..............9.2 S
                   ASOS.......................9.5 
                   DAVIS..................... 8.4 S [170 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..........1.78  DEPARTURE......-1.92
                         ASOS..............1.76
TOTAL PRECIPITATION FOR THE YEAR..........24.97  DEPARTURE......-9.72
                         ASOS.............25.27
 
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  AER0 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 86/65/76/+7/0.00/.../..                 28 SW  AERO 23 SW  RMY 27
8/26 88/70/79/+9/0.25/.../..                 23 W   AER0 17 W   RMY 21
8/27 86/66/76/+7/0.00/.../..                 14 SE  AERO 12 SE  RMY 15
8/28 86/66/76/+7/0.00/.../..                 25 SSE AERO 20 SSE RMY 27

8/29 Low temp since midnight is 66F; normal low is now 60F

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 29
HIGH 95F IN 1953
LOW 41F IN 1982
PRECIP 2.88 INCHES IN 1962
PEAK GUST 70e MPH S IN 1949

RECORDS FOR AUGUST 30
HIGH 94F IN 1953
LOW 39F IN 1965
PRECIP 2.75 INCHES IN 1936
PEAK GUST 43 MPH NW IN 1965

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