BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, AUGUST 6, 2015 ALL TIMES ARE IN EASTERN STANDARD TIME SKIES CLEAR AND TRANQUIL AND COOLER WEATHER  MOVES INTO THE REGION Clear skies and a cooler patterned allowed for an  overnight low 59F this morning just before sunrise. Extremely sharp and clear visibility was noted at this morning's 7:00 AM EST observation at approximately 85 miles in all directions.  By the 1:00 PM EST observation mostly clear skies had become partly cloudy with scattered cumulus and broken thin cirrus above. A maximum of 79F was reached by that time as well. PRELIMINARY STATS FOR JULY 2015 TEMPERATURE, Deg. F Avg. Max. 82.2 [+1.4] Avg. Min. 63.6 [+0.7] Mean      72.9 [+1.0] Corrected mean: 72.4  Max. for month: 92 on 29th Min. for month: 56 on 16th, 17th HEATING DEGREE DAYS  Total heating units: 1 [-8]     Total for the season: 1 [-8] Total for last season: 0 COOLING DEGREE DAYS Total cooling units: 256 [+34]     Total for the season: 394 [+43] Total for last season: 337 PRECIPITATION, Inches Total: 3.09 [-0.93] Greatest in 24 hrs: 2.03, 9-10th   WIND, mph Avg. uncorrected wind speed: 9.6 Avg. corrected wind speed: 10.2 Prevailing wind direction: S @ 14% Peak gust and direction: 35 S on the 7th SUNSHINE: Campbell-Stokes card minutes: 16452 / 26682 or 62%  Astronomical total minutes:   17101 / 27760 or 62%   Today's Observations:   7 A.M. Weather: Clear, few cirrus distant E-W Temperature: 65F; Dew Point: 55F; Wind: WNW at 7 kts Sea-level pressure: 29.93 ins. Hg, rising, then more slowly   Visibility: 80 miles  6-hr Max temp: 65F 6-hr Min temp: 59F 24-hr precip: 0.00  BHO SA 1155 CLR 80 135/65/55/3007/993/ FEW CI DSNT E-W/ 8/001 51007 10065 20059     10 A.M. Weather: Scattered cirrus, few small cumulus in all directions Temperature: 75F; Dew Point 54F; Wind: NW at 7 kts  Sea-level pressure: 29.94 ins. Hg, rising, then falling but higher  Visibility: 80 miles BHO SA 1455 250 SCT 80 140/75/54/3107/994/ FEW SML CU ALQDS/ 8/101 50005 1 P.M. Weather: Scattered cumulus, thin broken cirrus Temperature: 78F; Dew Point: 54F; Wind: estimated W at 9 kts, Wind Direction: W varying NW Sea-level pressure: 29.93 ins. Hg, falling, then rising but lower still Visibility: 80 miles  6-hr Max temp: 79F   6-hr Min temp: 65F   BHO SA 1755 60 SCT E250 -BKN 80 135/78/54/E2809/993/  WND 26V32/ 8/101 55005 10079 20065 SUMMARY FOR WEDNESDAY, AUGUST 6, 2015     TEMPERATURE (DEGREES F) MAX.....84   NORMAL.....81 MIN.....64   NORMAL.....63 MEAN....74   NORMAL.....72   DEPARTURE FROM 30-YEAR NORMAL........................+2 TOTAL DEPARTURE FOR THE MONTH.......................+21 [+3.3 DEGREES/DAY]   COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............9   DEPARTURE..........+2 TOTAL COOLING UNITS FOR THE MONTH..............56   DEPARTURE.........+20 TOTAL COOLING UNITS FOR THE SEASON............450   DEPARTURE.........+63 TOTAL COOLING UNITS LAST SEASON TO DATE.......369   DIFFERENCE........+81   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................28  WNW  AT  1:34 P.M.                          ASOS........................27  WSW  AT 12:28 P.M. .                      DAVIS.......................26  W    AT 12:27 P.M. RMY 27 FASTEST MILE FOR YESTERDAY.....................20  W    AT 12:29 P.M.    MAXIMUM 2-MINUTE ASOS AVERAGE..................20  W    AT  2:05 P.M.      MAXIMUM 2-MINUTE DAVIS AVERAGE.................18  W    AT 12:29 P.M.    AVERAGE WIND SPEED AND DIRECTION.............11.1 WNW                     ASOS......................10.8                    DAVIS......................9.6 WNW [286 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.....-0.38                          ASOS...............0.38 TOTAL PRECIPITATION FOR THE YEAR...........27.73  DEPARTURE.....-4.01                         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  low since midnight is 59F; normal low is now 63F DAILY RECORDS FOR JULY 2015 7/10 - RECORD DAILY PRECIPITATION OF 1.95 INCHES, surpasses previous record of 1.68 in. in 1933 7/20 - RECORD DAILY HIGH MINIMUM TEMPERATURE OF 73F, ties previous record of 73F in 1977 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 6 HIGH 95F IN 1931 LOW 48F IN 1934 PRECIP 1.47 INCHES IN 1995 PEAK GUST 44e MPH SSW IN 1940 RECORDS FOR AUGUST 7 HIGH 95F IN 1924 LOW 51F IN 2004 PRECIP 3.32 INCHES IN 1926 PEAK GUST 51 MPH NE 1975 TODAY'S REPORT PREPARED BY: Brian Fitzgerald