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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, AUGUST 26, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

HUMIDITY FINALLY EXITS THE REGION AS DRY AIR RETURNS

Dew points that have been stuck in the upper 60s and
low 70s since Friday have finally started to drop
as drier air and high pressure began to work into the
region this morning. Fog was present for the 7:00 AM EST
observation, but by 10:00 AM, fog had lifted and sunny
conditions were present. 

By the 1:00 PM EST observation skies were mostly sunny
with improving visibility. Hazy conditions were still
in place; however, 40 miles in all directions could
been seen compared with this morning's 3/4 of a mile.
Dew points had dropped to the lower 60s with a steady
wind from the W. A maximum temperature of 82F was 
recorded at the same time as well.
  

Today's Observations:

7 A.M.
Weather: Fog
Temperature: 69F; Dew Point: 69F; Wind: estimated W at 2 kts,
Wind Speed and Direction: Light and Variable
Sea-level pressure: 29.91 ins. Hg, rising, unsteadily
Visibility: 3/4 of a mile, obscured by fog
6-hr Max temp: 71F
6-hr Min temp: 69F
24-hr precip: Trace
BHO SA 1155 W3 X 3/4F 129/69/69/E2702/991/ WND LGT AND VRB/ 
8//// 52012 10071 20069

10 A.M.
Weather: Scattered cumulus, few cumulus fractus
in all directions
Temperature: 77F; Dew Point 67F; Wind: WSW at 7 kts,
Sea-level pressure: 29.92 ins. Hg, rising, then more quickly
Visibility: 20 miles, hazy
BHO SA 1455 40 SCT 20 132/77/67/2407/992/ FEW CUFRA ALQDS HAZY/ 
8/700 53003
 
1 P.M.
Weather: Scattered cirrus, few cumulus in all directions
Temperature: 82F; Dew Point: 62F; Wind: W at 8 kts, 
Sea-level pressure: 29.91 ins. Hg, rising, then falling and lower
Visibility: 40 miles, hazy
6-hr Max temp: 82F  
6-hr Min temp: 69F
BHO SA 1755 250 SCT 40 128/82/62/2608/991/ FEW CU AQLDS HAZY/ 
8/101 58004 10082 20069 


SUMMARY FOR TUESDAY, AUGUST 25, 2015 
  
TEMPERATURE (DEGREES F)
MAX.....85   NORMAL.....78 
MIN.....68   NORMAL.....61 
MEAN....77   NORMAL.....69 
 
DEPARTURE FROM 30-YEAR NORMAL........................+8
TOTAL DEPARTURE FOR THE MONTH.......................+75  [+2.8 DEGREES/DAY]
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............12    DEPARTURE.........+7
TOTAL COOLING UNITS FOR THE MONTH.............226   DEPARTURE.........+67
TOTAL COOLING UNITS FOR THE SEASON............620   DEPARTURE........+110
TOTAL COOLING UNITS LAST SEASON TO DATE.......442   DIFFERENCE.......+178
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................22  S    AT   7:56 P.M.        
                   ASOS........................23  S    AT   7:56 P.M.     
                   DAVIS.......................22  S    AT   5:06 P.M. RMY 22
FASTEST MILE FOR YESTERDAY.....................17  S    AT   7:56 P.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE..................18  S    AT   7:57 P.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE.................17  S    AT   7:57 P.M.     
AVERAGE WIND SPEED AND DIRECTION..............8.4 S 
                   ASOS.......................8.3
                   DAVIS......................7.9 S [192 deg.]
* Last of several occurrences...

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....Trace  DEPARTURE.....-0.11
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........2.90  DEPARTURE.....-0.46
                          ASOS..............2.88
TOTAL PRECIPITATION FOR THE YEAR...........30.26  DEPARTURE.....-4.09
                        ASOS...............N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR 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

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/.../..                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/..../.../..               38 W   RMY 41  TSTM
8/16 87/65/76/+5/..../.../..               16 W   RMY N/A
8/17 90/70/80/+9/0.00/.../..               17 W   RMY 18
8/18 92/70/91/+10/0.27/.../..              31 W   RMY 32  TSTM
8/19 87/69/78/+8/0.00/.../..               23 S   RMY 24
8/20 85/70/78/+8/0.00/.../..               22 ESE RMY 22
8/21 82/69/76/+6/0.31/.../..               21 S   RMY 23
8/22 73/66/70/0/T/.../..                   18 ENE RMY 16
8/23 70/66/68/-2/0.18/000/00               20 ENE RMY 18
8/24 78/67/73/+3/..../.../..               18 SSW RMY 19
8/25 85/68/77/+8/..../.../..               22 S   RMY 22

8/26 low since midnight is 69F; normal low is now 61F

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 26
HIGH 96F IN 1900, 1948
LOW 46F IN 1885
PRECIP 5.85 INCHES IN 1924
PEAK GUST 55e MPH NNW IN 1947

RECORDS FOR AUGUST 27
HIGH 99F IN 1948
LOW 44F IN 1885
PRECIP 2.77 INCHES IN 1946
PEAK GUST 48 MPH NW IN 1983

TODAY'S REPORT PREPARED BY: Brian Fitzgerald