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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, AUGUST 7, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
 
BEAUTIFUL SUNNY, DRY AND COOL EARLY AUGUST WEATHER
RADIATIONAL COOLING EARLY TODAY; 50F at Norwood Airport
OTHER LOWS: Boston, 65F; Worcester, 61F, Taunton 53F
 
Today was a beautiful almost fall feeling day in early August 
with sunshine and visibility 75 to 80 miles with temperatures
rising through the 70's and dew points down in the 50's. 
Morning lows dropped to the 50's in the surrounding area below
a temperature inversion in the dry air.
 
Today's Observations:

7 A.M.
Weather: Thin scattered cirrus (ESE-WSW) invading from S-SW, lower 
cirrus and cirrostratus layer
Temperature: 67F; Dew Point: 55F; Wind: NNE at 7 kts
Sea-level pressure: 29.98 ins. Hg, rising, then more slowly 
Visibility: 75 miles, light distant haze
6-hr Max temp: 67F
6-hr Min temp: 61F
24-hr precip: 0.00
BHO SA 1155 300 -SCT 75 151/67/55/0307/998/ THN CI INVDNG
FRM S-SW CI LYR XTDNG ESE-WSW LWR CI/CS LYR DSNT SE-SW
LGT DSNT HZ/ 8/006 51012 10067 20061 
 
10 A.M.
Weather: Thin scattered cirrus, thin broken cirrus. lower ci
layer E-S-SW, cumulus forming mostly W-N
Temperature: 73F; Dew Point 55F; Wind: ENE at 7 kts,
Wind: Direction variable NE-ESE  
Sea-level pressure: 29.98 ins. Hg, rising, then steady
Visibility: 75 miles, light distant haze 
BHO SA 1455 250 -SCT 300 -BKN 75 151/73/55/0607/998/ CU FRMG
MSTLY DSNT W-N WND 04V11/ 8/101 51000 
 
1 P.M.
Weather: Scattered cumulus, stratocumulus formed from cumulus,
extending SE-SW-NNE, few moderate tops, scattered dense cirrus,
layer extending ESE-S-SW, thin scattered cirrus 
Temperature: 77F; Dew Point: 55F; Wind: NE at 7 kts,
Wind: Direction N variable ENE
Sea-level pressure: 29.95 ins. Hg, falling, then more rapidly
Visibility: 80 miles 
6-hr Max temp: 78F 
6-hr Min temp: 67F 
BHO SA 1755 55 SCT 220 SCT 250 SCT 300 -SCT 80 143/77/55/
0407/995/ CUFRA/CU/SCCG/FEW MDT TOPS XTDNG SE-SW-NNE
DNS CI LYR ESE-S-SW OCNL CU FRMG VC OVHD LGT DSNT HZ
WND 36V07/ 8/402 58008 10078 20067

 
SUMMARY FOR THURSDAY, AUGUST 6, 2015
  
TEMPERATURE (DEGREES F)
MAX.....80   NORMAL.....81
MIN.....59   NORMAL.....63                                                                     
MEAN....70   NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL........................-2
TOTAL DEPARTURE FOR THE MONTH.......................+19 [+3.0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............5   DEPARTURE..........-2
TOTAL COOLING UNITS FOR THE MONTH..............61   DEPARTURE.........+18
TOTAL COOLING UNITS FOR THE SEASON............455   DEPARTURE.........+61
TOTAL COOLING UNITS LAST SEASON TO DATE.......376   DIFFERENCE........+79

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................22  W    AT 12:09 P.M.     
                   ASOS........................22  W    AT 12:09 P.M. . 
                   DAVIS.......................20  WNW  AT 11:42 A.M. RMY 21
FASTEST MILE FOR YESTERDAY.....................14  W    AT  3:44 P.M.    
MAXIMUM 2-MINUTE ASOS AVERAGE..................16  W    AT  3:13 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE.................14  WNW  AT 11:44 P.M.  
AVERAGE WIND SPEED AND DIRECTION..............9.3  NW
                   ASOS.......................9.2
                   DAVIS......................8.2  WNW [300 deg.]
* Last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00  DEPARTURE.....-0.15
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........0.37  DEPARTURE.....-0.53
                         ASOS...............0.38
TOTAL PRECIPITATION FOR THE YEAR...........27.73  DEPARTURE.....-4.16
                        ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings
 
PRELIMINARY CLIMATE SUMMARY FOR JULY-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
 
7/1  80/63/72/+2/0.59/466/51               30 SSE RMY 33  TSTM
7/2  78/60/69/-1/0.00/721/79               23 WNW RMY N/A
7/3  79/58/69/-2/0.00/867/95               17 SSW RMY 17
7/4  74/61/68/-3/T/109/12                  16 S   RMY N/A
7/5  82/58/70/-1/0.00/865/95               20 WSW RMY 20 
7/6  85/64/75/+4/0.00/755/83               20 S   RMY 21
7/7  84/65/75/+4/0.02/445/49               35 S   RMY 40
7/8  87/68/78/+6/T/372/41                  23 NE  RMY N/A
7/9  73/61/67/-5/0.08/390/43               24 NE  RMY 25
7/10 80/59/70/-2/1.95/535/59               18 W   RMY N/A TSTM
7/11 84/61/73/+1/0.00/868/96               21 NW  RMY 19
7/12 88/67/78/+6/0.00/813/90               20 W   RMY 17
7/13 82/66/74/+2/0.00/424/47               21 E   RMY 20
7/14 81/64/73/+1/0.04/396/44               25 S   RMY 27
7/15 84/61/73/+1/0.14/297/33               24 ENE RMY 26
7/16 72/56/64/-8/0.00/852/95               25 NNE RMY 24
7/17 79/56/68/-4/0.00/708/79               21 S   RMY N/A
7/18 76/63/70/-2/0.16/027/03               29 SSW RMY 30  TSTM
7/19 89/68/79/+7/0.01/509/57               25 SSW RMY 27
7/20 90/73/82/+10/0.00/793/89              24 W   RMY 26
7/21 87/70/79/+7/T/267/30                  24 W   RMY 25
7/22 82/64/73/+1/T/727/82                  24 WNW RMY 26
7/23 81/62/72/+0/0.00/753/85               22 W   RMY 23
7/24 80/60/70/-2/T/663/75                  23 N   RMY 25
7/25 71/59/65/-7/0.00/265/30               20 ENE RMY N/A 
7/26 78/59/69/-3/T/018/02                  24 SSE RMY 25  TSTM
7/27 84/67/76/+4/T/378/43                  24 S   RMY N/A TSTM
7/28 89/68/79/+7/0.00/604/69               18 S   RMY N/A
7/29 92/70/81/+9/0.00/830/95               21 W   RMY N/A 
7/30 89/72/81/+9/0.10/514/59               31 S   RMY N/A
7/31 87/68/78/+6/0.00/870/100              28 W   RMY N/A
 
8/1  88/68/78/+6/0.06/.../..               28 WNW RMY N/A
8/2  86/62/74/+2/0.00/.../..               24 SW  RMY N/A
8/3  89/68/79/+7/0.00/.../..               31 S   RMY N/A 
8/4  86/66/76/+4/0.31/.../..               45 W   RMY 50  TSTM 
8/5  84/64/74/+2/0.00/.../..               28 WNW RMY 27
8/6  80/59/70/-2/0.00/.../..               22 W   RMY 21
 
8/7  low since midnight is 61F; normal low is now 63F
 
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 7
HIGH 95F IN 1924
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975
 
RECORDS FOR AUGUST 8
HIGH 93F IN 1909,1949
LOW 47F IN 1903
PRECIP 3.08 INCHES IN 1976
PEAK GUST 45 MPH WNW IN 1958
 
TODAY'S REPORT PREPARED BY: Robert Skilling