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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, AUGUST 16, 2017  
ALL TIMES ARE IN EASTERN STANDARD TIME

MOSTLY SUNNY DAY AS WINDS SHIFT NORTHWESTERLY

Sunny, warm, and dry conditions have returned after the
cloudy and damp conditions yesterday.  Morning skies were
mostly clear with few cirrus.  Cumulus formed in late
morning as distant cirrostratus were observed along the
horizon.  Temperatures warmed to 83F by 1:00PM EST, and 
dew points fell into the 50s by early afternoon.  Winds
began gusting over 20 MPH in the late morning.  Wind
direction shifted from south to northwest over night.


Today's Observations:

7 A.M.
Weather: Few cirrus W-SE
Temperature: 68F; Dew Point: 66F; Wind: NW at 10 kts
Sea-level pressure: 29.93 ins. Hg, rising, then more slowly
Visibility: 15 miles, distant fog in all directions
6-hr Max temp: 68F
6-hr Min temp: 64F
24-hr precip: 0.00 in.
BHO SA 1155 CLR 15 135/68/66/3110/993/ FEW CI W-SE DSNT FG ALQDS/
8/001 51013 10068 20064

10 A.M.
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 79F; Dew Point: 62F; Wind: NNW at 10G18 kts
Sea-level pressure: 29.94 ins. Hg, increasing then decreasing
Visibility: 40 miles, distant haze in all directions
BHO SA 1455 54 SCT 220 SCT 40 138/79/62/3310G18/994/ 
DSNT HZ ALQDS/ 8/105 50003

1 P.M. 
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 83F; Dew Point: 59F; Wind: NW at 10G18 kts
Sea-level pressure: 29.94 ins. Hg, steady, then falling
Visibility: 40 miles, distant haze in all directions
6-hr Max temp: 83F 
6-hr Min temp: 68F
BHO SA 1755 44 SCT 250 SCT 40 140/83/59/3210G18/994/
DSNT HZ ALQDS/ 8/105 53002 10083 20068

SUMMARY FOR TUESDAY, AUGUST 15, 2017
 
TEMPERATURE (DEGREES F)
MAX.....79   NORMAL.....80
MIN.....64   NORMAL.....62
MEAN....72   NORMAL.....71

DEPARTURE FROM 30-YEAR NORMAL.........................+1
TOTAL DEPARTURE FOR THE MONTH.........................+6 [+0.2 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............7   DEPARTURE..........+1
TOTAL COOLING UNITS FOR THE MONTH.............105   DEPARTURE..........+2
TOTAL COOLING UNITS FOR THE SEASON............526   DEPARTURE.........+72
TOTAL COOLING UNITS LAST SEASON TO DATE.......636   DEPARTURE........-110

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................21  S  AT 4:44 P.M.
                   AERO........................21  S  AT 5:10 P.M.
                   ASOS........................22  S  AT 4:45 P.M.
                   DAVIS.......................22  S  AT 5:11 P.M. RMY 23
FASTEST MILE FOR YESTERDAY.....................15  S  AT 6:35 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE..................16  S  AT 6:35 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.................14 SSW AT 7:50 P.M.
AVERAGE WIND SPEED AND DIRECTION..............9.0  S
                   ASOS.......................9.2
                   DAVIS......................7.9 SSW [213 DEG.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.39  DEPARTURE......-0.71
                         ASOS..............1.38
TOTAL PRECIPITATION FOR THE YEAR..........36.15  DEPARTURE......+3.06
                         ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings


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
M:    Missing data

8/1  87/65/76/+4/0.00/762/88               16 ESE*AERO 16 NNW RMY 16
8/2  86/65/76/+4/1.09/372/43               32 W   AERO 36 W   RMY 34 TSTM
8/3  83/65/74/+2/0.00/552/64               22 S   AERO 23 S   RMY 24
8/4  84/66/75/+3/0.00/697/81               26 S   AERO 30 S   RMY 29
8/5  75/63/69/-3/0.10/060/07               23 NW  AERO 28 NW  RMY 29
8/6  76/57/67/-5/0.00/795/93               30 NW  AERO 32 NW  RMY 31
8/7  76/60/68/-4/0.01/597/70               28 SSW AERO 28 SSW RMY 29
8/8  74/60/67/-5/0.02/000/00               17 S   AERO 16 SSE RMY 16
8/9  83/58/71/-1/0.00/.../..               18 S   AERO 18 S   RMY 19 
8/10 86/63/75/+4/T/.../..                  20 S   AERO 18 S   RMY 20
8/11 82/63/73/+2/0.00/.../..               17 S   AERO 16 S   RMY 17
8/12 75/57/66/-5/0.17/.../..               22 SSW*AERO 22 SSW RMY 23
8/13 84/67/76/+5/0.00/.../..               26 WNW AERO 24 WNW RMY 26
8/14 82/67/75/+4/0.00/.../..               14 SSW*AERO 14 S   RMY 15
8/15 79/64/72/+1/T/.../..                  21 S   AERO 21 S   RMY 23

8/16  Low temp since midnight is 64F; normal low is now 62F


DAILY RECORDS FOR AUGUST

None so far.


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

RECORDS FOR AUGUST 16
HIGH 95F IN 1944
LOW 50F IN 1927
PRECIP 1.47 INCHES IN 1926
PEAK GUST 45e MPH N IN 1951

RECORDS FOR AUGUST 17
HIGH 97F IN 1944
LOW 48F IN 1902
PRECIP 2.17 INCHES IN 1998
PEAK GUST 50e MPH SSW IN 1952, 50 MPH WNW IN 1962

TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle