BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, SEPTEMBER 2, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

ABOVE NORMAL HEAT RETURNS
AFTER BRIEF COOL DOWN MONDAY
 
Yesterday's maximum temperature of 81F somewhat close,
but still warmer than the daily normal maximum for the
beginning of September at 76F. Winds off the ocean yesterday
helped to keep temperatures somewhat surpressed as heat
works its way back in today.
 
A steady breeze from the SW this morning along with humidity
building overnight have allowed temperatures to climb through
the morning. Thin layers of smoke and fog, along with haze
kept visibility to just 10 miles at this morning's 7:00 AM EST
observation even with no visible clouds in the sky.
 
 
BHO Warmest Augusts, deg F (1885-2015)
 
1) 72.6 in 2012
2) 72.5 in 1988
3) 72.4 in 2015
4) 72.3 in 2005
5) 72.1 in 2002
 
BHO Warmest August Average Maximum Temperature, deg F (1885-2015)
 
1) 83.2 in 2005
2) 83.1 in 1949
3) 82.6 in 2015
4) 82.5 in 1988
   82.5 in 2002
   82.5 in 2012
 
BHO Warmest August Average Minimum Temperature, deg F (1885-2015)
 
1) 64.9 in 2001
2) 64.6 in 2012
3) 64.4 in 2005
   64.4 in 2015
5) 64.3 in 2003
 
 
BHO Slowest August Wind Speed, mph (1885-2015)
 
1) 9.5 in 1996
   9.5 in 2008
3) 10.0 in 1899
   10.0 in 2009
   10.0 in 2012
   10.0 in 2015
 

PRELIMINARY STATS FOR AUGUST 2015

TEMPERATURE, Deg. F
Avg. Max. 82.6 [+3.4]
Avg. Min. 64.4 [+2.6]
Mean      73.5 [+3.0]
Corrected mean: 72.4
Max. for month: 92 on 18th
Min. for month: 58 on 8th, 10th, 28th

COOLING DEGREE DAYS
Total cooling units: 272 [+86]  
Total for the season: 537 [+129]
Total for last season: 479

PRECIPITATION, Inches
Total: 2.90 [-1.13]
Greatest in 24 hrs: 1.24, 15th-16th
 
WIND, mph
Avg. uncorrected wind speed: 9.3
Avg. corrected wind speed: 10.0
Prevailing wind direction: WNW @ 15%
Peak gust and direction: 39 W on the 4th [TSTM GUST]

SUNSHINE:
Campbell-Stokes card minutes: PENDING
Astronomical total minutes:   PENDING
 
 
Today's Observations:
 
7 A.M.
Weather: Sky clear, no clouds, think smoke layer all quadrants,
thin fog all quadrants
Temperature: 68F; Dew Point: 64F; Wind: SW at 9 kts,
Sea-level pressure: 30.03 ins. Hg, falling, the rising and higher
Visibility:  10 miles, thin smoke layer in all directions, thin
fog in all directions, hazy
6-hr Max temp: 68F
6-hr Min temp: 64F
24-hr precip: 0.00 ins
BHO SA 1155 CLR 10 169/68/64/2309/003/ SKC THN K LYR ALQDS THN FG 
ALQDS HAZY/ 8/000 53001 10068 20064
 
10 A.M.
Weather: Sky clear, no clouds, thin smoke layer all quadrants
Temperature: 81F; Dew Point 65F; Wind: SW at 8 kts
Sea-level pressure: 30.01 ins. Hg, falling, then more slowly
Visibility: 15 miles, thin smoke layer in all directions, hazy
BHO SA 1455 CLR 15 164/81/65/2308/001/ SKC THN K LYR ALQDS HAZY/ 
8/000 56005
 
1 P.M.
Weather: Sky clear, no clouds, haze layer aloft
Temperature: 87F; Dew Point: 62F; Wind: SW at 11 kts,
Wind: Gust 16 kts pst hour, 
Wind direction: S variable WSW  
Sea-level pressure: 29.96 ins. Hg, falling steadily
Visibility: 15 miles, hazy all directions
6-hr Max temp: 89F
6-hr Min temp: 68F
BHO SA 1755 CLR 15 145/87/62/2211/996/ SKC HZ LYR ALF HAZY ALQDS
GST 16 KTS PST HR WND 19V25/ 57019 10089 20068
 
SUMMARY FOR TUESDAY, SEPTEMBER 1, 2015
  
TEMPERATURE (DEGREES F)
MAX.....81   NORMAL.....76
MIN.....65   NORMAL.....59
MEAN....73   NORMAL.....68
 
DEPARTURE FROM 30-YEAR NORMAL........................+5
TOTAL DEPARTURE FOR THE MONTH........................+5  [+4.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............8    DEPARTURE.........+4
TOTAL COOLING UNITS FOR THE MONTH...............8   DEPARTURE..........+4
TOTAL COOLING UNITS FOR THE SEASON............674   DEPARTURE........+133
TOTAL COOLING UNITS LAST SEASON TO DATE.......493   DIFFERENCE.......+181

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................20  SSW   AT    7:59 P.M.         
                   ASOS........................20  S     AT    8:00 P.M.    
                   DAVIS.......................18  SSW   AT    7:55 P.M. RMY 20
FASTEST MILE FOR YESTERDAY.....................15  SSW   AT    7:56 P.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE..................15  S     AT    8:08 P.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE.................14  SSW   AT    7:57 P.M.     
AVERAGE WIND SPEED AND DIRECTION...............8.8 N 
                   ASOS........................9.1
                   DAVIS...................... 7.7 ENE [058 deg.]
 
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...........0.00  DEPARTURE.....-0.11
                          ASOS..............0.00
TOTAL PRECIPITATION FOR THE YEAR...........30.26  DEPARTURE.....-4.87
                        ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings
 
PRELIMINARY CLIMATE SUMMARY FOR AUGUST & SEPTEMBER 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
 
8/1  88/68/78/+6/0.06/729/84               28 WNW RMY N/A
8/2  86/62/74/+2/0.00/865/100              24 SW  RMY N/A
8/3  89/68/79/+7/0.00/690/80               31 S   RMY N/A 
8/4  86/66/76/+4/0.31/422/49               45 W   RMY 50  TSTM 
8/5  84/64/74/+2/0.00/765/89               28 WNW RMY 27
8/6  80/59/70/-2/0.00/685/80               22 W   RMY 21
8/7  78/61/70/-2/0.00/845/99               20 ESE RMY 18
8/8  77/58/68/-4/0.00/741/87               18 E   RMY N/A
8/9  72/59/66/-6/T/458/54                  27 NNE RMY 26  
8/10 84/58/71/0/0.00/830/98                28 S   RMY N/A
8/11 70/63/67/-4/0.52/000/00               32 SSE RMY 35
8/12 83/65/74/+3/0.00/766/91               22 W   RMY 20
8/13 83/62/73/+2/0.00/832/99               18 WNW RMY 18
8/14 86/63/75/+4/0.00/837/100              21 S   RMY 23
8/15 91/66/79/+8/1.24/534/64               38 W   RMY 41  TSTM
8/16 87/65/76/+5/T/774/93                  16 W   RMY N/A TSTM
8/17 90/70/80/+9/0.00/805/97               17 W   RMY 18
8/18 92/70/91/+10/0.27/546/66              31 W   RMY 32  TSTM
8/19 87/69/78/+8/0.00/775/94               23 S   RMY 24
8/20 85/70/78/+8/0.00/723/88               22 ESE RMY 22
8/21 82/69/76/+6/0.31/98/12                21 S   RMY 23
8/22 73/66/70/0/T/98/12                    18 ENE RMY 16
8/23 70/66/68/-2/0.18/000/00               20 ENE RMY 18
8/24 78/67/73/+3/0.01/122/15               18 SSW RMY 19
8/25 85/68/77/+8/..../526/65               22 S   RMY 22
8/26 82/64/73/+4/..../629/78               21 NW  RMY 22
8/27 79/59/69/+0/0.00/.../..               22 W   RMY 23
8/28 80/58/69/+0/0.00/753/94               15 NW  RMY 15
8/29 81/60/70/+2/0.00/.../..               21 WSW RMY 21
8/30 86/65/76/+8/0.00/.../..               23 W   RMY 23
8/31 87/68/78/+10/0.00/.../..              26 W   RMY 28
 
9/1  81/65/73/+5/0.00/.../..               20 SSW RMY 20
 
9/2 low since midnight is 64F; normal low is now 59F
 
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 SEPTEMBER 2
HIGH 99F IN 1953 (SEPTEMBER MAXIMUM RECORD)
LOW 44F IN 1909
PRECIP 2.73 INCHES IN 1947
PEAK GUST 55e MPH WNW IN 1944
 
RECORDS FOR SEPTEMBER 3
HIGH 95F IN 1929
LOW 43F IN 1983
PRECIP 3.82 INCHES IN 1972 (TROPICAL STORM CARRIE)
PEAK GUST 58 MPH NNE IN 1972 (TROPICAL STORM CARRIE)
 
TODAY'S REPORT PREPARED BY: Brian Fitzgerald