BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, OCTOBER 25, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME A CLOUDY YET MILD DAY ATOP GREAT BLUE HILL.... We observed a somewhat steady and low visibility throughout the day of 40 miles. Dew points have been slowly rising with an approaching low pressure center. Skies have been mostly cloudy with filtered sun at times and winds generally light and at times variable. The high so far today is 62F, 5 degrees above the daily normal maximum of 57F. The low since midnight is 47F, 7 degrees above the normal low of 40F. Today's Observations: 7 A.M. Weather: Broken altocumulus & altostratus; Broken cirrostratus Temperature: 51F; Dew Point: 40F; Wind: WNW at 8 kts Sea-level pressure: 30.32 ins. Hg, rising then rising more slowly Visibility: 45 miles 6-hr Max temp: 51F 6-hr Min temp: 47F BHO SA 1155 E150 BKN 200 BKN 45 266/51/40/3008/032/ 8/098 5107 10051 20047 10 A.M. Weather: Broken altocumulus & altostratus; Broken cirrostratus Temperature: 60F; Dew Point: 43F; Wind: ENE at 3 kts Winds Light Sea-level pressure: 30.30 ins. Hg, rising then falling Visibility: 50 miles BHO SA 1455 E170 BKN 250 BKN 50 262/60/43/0703/030/ WND L/V/ 8/098 58004 1 P.M. Weather: Broken altocumulus & altostratus Temperature: 62F; Dew Point: 42F; Wind: NE at 6 kts Sea-level pressure: 30.24 ins. Hg, falling, then more rapidly Visibility: 50 miles 6-hr Max temp: 62F 6-hr Min temp: 51F BHO SA 1755 E170 BKN 50 242/62/42/0406/024/ 8/09// 58020 10062 20051 SUMMARY FOR THURSDAY OCTOBER 24, 2019 TEMPERATURE (DEGREES F) MAX.....67 NORMAL.....58 MIN.....43 NORMAL.....40 MEAN....55 NORMAL.....49 DEPARTURE FROM 30-YEAR NORMAL.....................+6 TOTAL DEPARTURE FOR THE MONTH....................+24 [+0.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............10 DEPARTURE.........-6 TOTAL HEATING UNITS FOR THE MONTH..............271 DEPARTURE........-28 TOTAL HEATING UNITS FOR THE SEASON.............364 DEPARTURE........-77 TOTAL HEATING UNITS LAST SEASON TO DATE........385 DEPARTURE........-21 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY................0 DEPARTURE..........0 TOTAL COOLING UNITS FOR THE MONTH................2 DEPARTURE.........-3 TOTAL COOLING UNITS FOR THE SEASON.............682 DEPARTURE........+80 TOTAL COOLING UNITS LAST SEASON TO DATE........874 DEPARTURE.......-192 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................28 SSW AT 8:36 P.M. AERO.........................29 SSW AT 7:36 P.M. ASOS.........................28 SSW AT 3:18 P.M. DAVIS........................28 SSW AT 6:41 P.M. RMY 29 FASTEST MILE FOR YESTERDAY......................21 S AT 6:50 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................21 SSW AT 7:40 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................20 S AT 7:24 P.M. AVERAGE WIND SPEED AND DIRECTION...............13.5 SW ASOS........................13.7 DAVIS.......................13.2 SW [232 deg.] 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..........5.04 DEPARTURE......+1.44 ASOS..............5.30 TOTAL PRECIPITATION FOR THE YEAR..........43.46 DEPARTURE......+0.77 ASOS.............43.53 PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST AERO: Aerovane wind recording system 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 M: Missing data 10/01 67/52/60/+3/0.06/.../.. 28 SW AERO 25 SSW RMY 29 10/02 74/49/62/+5/0.42/.../.. 30 ENE AERO 25 ENE RMY 28 10/03 51/46/49/-7/..../.../.. 28 ENE AERO 26 ENE RMY N/A 10/04 59/40/50/-6/..../.../.. 38 NNW AERO 38 NNW RMY 38 10/05 58/35/47/-9/0.00/.../.. 21 N AERO 18 SSW RMY N/A 10/06 65/44/55/0/0.00/.../.. 36 SSW AERO 35 SSW RMY N/A 10/07 77/57/67/+12/0.12/.../.. 47 SSW AERO 46 SSW RMY 49 10/08 60/52/56/+2/T/.../.. 22 NE AERO 18 NW RMY N/A 10/09 55/49/52/-2/..../.../.. 43 NE AERO 37 NE RMY 44 10/10 54/47/51/-3/..../.../.. 41 NE AERO 37 NE RMY 42 10/11 52/48/50/-3/..../000/00 41 NE AERO 39 NE RMY 41 10/12 52/49/51/-2/..../.../.. 39 NE AERO 37 NE RMY N/A 10/13 66/48/57/+4/..../.../.. 18 WNW AERO 17 WNW RMY 18 10/14 67/51/59/+7/..../.../.. 18 WSW AERO 17 WSW RMY N/A 10/15 61/43/52/0/..../.../.. 18 NNW AERO 17 NNW RMY N/A 10/16 61/45/53/+2/..../.../.. 58 ESE AERO 58 ESE RMY N/A 10/17 60/46/53/+2/..../.../.. 61 E AERO 63 E RMY N/A 10/18 57/41/49/-2/..../.../.. 29 WNW AERO 32 W RMY 32 10/19 58/36/47/-3/..../.../.. 18 NW AERO 18 NW RMY 19 10/20 60/43/52/+2/T/.../.. 14 NE AERO 16 NE RMY N/A 10/21 59/49/54/+4/0.01/.../.. 25 E AERO 21 NE RMY 23 10/22 58/47/53/+4/..../.../.. 29 E AERO 28 E RMY 23 10/23 65/48/57/+8/..../.../.. 35 W AERO 35 W RMY 36 10/24 67/43/55/+6/.../.../.. 28 SSW AERO 38 SSW RMY 29 10/25 The low since midnight is 47F, normal daily minimum is 40F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 25 HIGH 81F IN 1963 LOW 26F IN 1922,1939 PRECIP 2.45 INCHES IN 2005 SNOWFALL 1.2 INCHES IN 1960 PEAK GUST 72 MPH ESE IN 1980 RECORDS FOR OCTOBER 26 HIGH 80F IN 1963 LOW 24F IN 1933 PRECIP 1.72 INCHES IN 1894 SNOW 3.0 INCHES IN 1962 WIND 59 MPH SSE IN 1967 TODAY'S REPORT PREPARED BY: Andrew Swanson