BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, AUGUST 24, 2015 ALL TIMES ARE IN EASTERN STANDARD TIME DRIZZLE AND FOG OVERNIGHT, SKIES SLOW TO CLEAR MONDAY Thick fog has come and gone since Sunday, with only 1/8 of a mile visibility at this morning's 7:00 AM EST observation. Very light drizzle was intermittent this morning as well, ending before the 10:00 AM EST observation. At that time fog was slowly lifting from the summit. By the 1:00 PM EST observation breaks of sun were visible all  around the region, with isolated showers to the S and WSW-W of the station. Some thin fog was noted just outside of Boston Harbor and near the harbor islands. The observation recorded a maximum temperature so far of 77F.    Today's Observations: 7 A.M. Weather: Thick fog Temperature: 67F; Dew Point: 67F; Wind: estimated ENE at 4 kts, Wind: Light Sea-level pressure: 29.96 ins. Hg, rising then more quickly Visibility: 1/8th of a mile, Fog  6-hr Max temp: 68F 6-hr Min temp: 67F 24-hr precip: 0.08 ins. BHO SA 1155 W1 X 1/8F 146/67/67/E0604/996/ SUN DMLY VSBL WND LGT/ 8//// 530008 ASOS 70010 MANUAL 70008 10068 20067 10 A.M. Weather: Overcast stratus, partial fog WSW-E  Temperature: 71F; Dew Point 69F; Wind: Calm Sea-level pressure: 29.96 ins. Hg, rising, then falling and lower Visibility: 3 miles, except 20 miles ESE-SW 3-hr precip: trace BHO SA 1455 -X E3 OVC 3F 145/71/69/E0000/996/ VSBY ESE-SW 20 MI PARTIAL FG WSW-E WND CALM/ 8/6// 58001 MANUAL 6////   1 P.M. Weather: Scattered cumulus, broken altocumulus, few cumulus fractus in all directions, showers distant S and WSW-W Temperature: 77F; Dew Point: 69F; Wind: estimated E at 2 kts, Wind Speed: Light  Sea-level pressure: 29.93 ins. Hg, falling, then more quickly Visibility: 40 miles, except 10 miles WSW-W obscured by  distant rain showers 6-hr Max temp: 77F   6-hr Min temp: 67F 6-hr Precip Trace BHO SA 1755 40 SCT E70 BKN 40 135/77/69/E0902/993/ VSBY WSW-W 10 MI SHWRS DSNT S AND WSW-W MDT CU SW FEW CUFRA ALQDS THN FG ALQDS WND LGT/ 8/730 58010 MANUAL 6//// 10077 20067  SUMMARY FOR SUNDAY, AUGUST 23, 2015     TEMPERATURE (DEGREES F) MAX.....70   NORMAL.....78  MIN.....66   NORMAL.....61  MEAN....68   NORMAL.....70    DEPARTURE FROM 30-YEAR NORMAL........................-2 TOTAL DEPARTURE FOR THE MONTH.......................+64  [+2.6 DEGREES/DAY]   COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............3    DEPARTURE.........-2 TOTAL COOLING UNITS FOR THE MONTH.............206   DEPARTURE.........+57 TOTAL COOLING UNITS FOR THE SEASON............600   DEPARTURE........+100 TOTAL COOLING UNITS LAST SEASON TO DATE.......430   DIFFERENCE.......+170   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................20  ENE  AT   8:40 P.M.                            ASOS........................19  ENE  AT   8:39 P.M.                         DAVIS.......................18  ENE  AT   8:39 P.M. RMY 18 FASTEST MILE FOR YESTERDAY.....................12  ENE  AT   8:40 P.M.*      MAXIMUM 2-MINUTE ASOS AVERAGE..................15  ENE  AT   8:40 P.M.        MAXIMUM 2-MINUTE DAVIS AVERAGE.................13  E    AT   8:40 P.M.      AVERAGE WIND SPEED AND DIRECTION..............6.1 NE                     ASOS.......................6.5                    DAVIS......................5.8 NE [041 deg.] * Last of several occurrences... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.08  DEPARTURE.....-0.05                          ASOS...............0.10 TOTAL PRECIPITATION FOR THE MONTH...........2.89  DEPARTURE.....-0.24                           ASOS..............2.88 TOTAL PRECIPITATION FOR THE YEAR...........30.25  DEPARTURE.....-3.87                         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 low since midnight is 66F; 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 24 HIGH 92F IN 1947 LOW 43F IN 1971 PRECIP 2.40 INCHES IN 2010  PEAK GUST 54 MPH W IN 1986 RECORDS FOR AUGUST 25 HIGH 93F IN 1947, 1948, 2007  LOW 41F IN 1940 PRECIP 2.69 INCHES IN 2010  PEAK GUST 60e MPH SSW IN 1941 TODAY'S REPORT PREPARED BY: Brian Fitzgerald