BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, AUGUST 17, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0454E SUNSET: 1843E WARMER AND MORE HUMID WITH SOME BUILDING CUMULUS IN THE AFTERNOON HOURS.... Today we saw around 30 miles of visibility due to haze, and a consistent southwesterly wind a little below 10 mph on average. Dew points were in the mid to upper 60's, with temperatures climbing into the low 80's. The cloud layer became thicker at lower levels as the day progressed. No convective showers are seen as of yet. The high so far today is 82F, a degree above the daily normal maximum of 81F. The low so far today is 63F, which is the same as the daily normal minimum. ----------------------------------------------- Today's Observations: 7 A.M. Weather: Scattered altocumulus, broken cirrostratus Temperature: 67F; Dew Point: 64F; Relative Humidity: 89% Wind: WSW @ 5 kts, light Sea-level pressure: 30.25 in. Hg; rising steadily Visibility: 30 miles, hazy 6-hr Max temp: 67F 6-hr Min temp: 63F 24-hr Precip: 0.00 ins. BHO SA 1155 140 SCT 250 BKN 30 243/67/64/2405/025/ HAZY WND LGT/ 8/076 53011 10067 20063 10 A.M. Weather: Scattered cumulus and altocumulus, broken cirrostratus Temperature: 78F; Dew Point: 65F; Relative Humidity: 64% Wind: SSW @ 7 kts Sea-level pressure: 30.24 in Hg; steady then falling Visibility: 35 miles, hazy 3-hr Precip: 0.00 ins. BHO SA 1455 50 SCT 140 SCT 250 BKN 35 240/67/64/2207/024/ HAZY/ 8/156 57003 1 P.M. Weather: Scattered cumulus, broken altocumulus and cirrostratus Temperature: 81F, Dew point: 67F; Relative Humidity: 64% Wind: SSW @ 7 kts Sea-level pressure: 30.20 in Hg; falling steadily Visibility: 35 miles, hazy 6-hr Max temp: 82F 6-hr Min temp: 67F 6-hr Precip: 0.00 ins. BHO SA 1755 45 SCT 140 BKN 250 BKN 35 228/81/67/2207/020/ HAZY/ 8/256 58012 10082 20067 SUMMARY FOR MONDAY, AUGUST 16, 2021 TEMPERATURE (DEGREES F) MAX.......78 NORMAL.....81 MIN.......59 NORMAL.....63 MEAN......69 NORMAL.....72 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL.......... -3 TOTAL DEPARTURE FOR THE MONTH.......................+8 [+0.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY................0 DEPARTURE.........0 TOTAL HEATING UNITS FOR THE MONTH................0 DEPARTURE........-3 TOTAL HEATING UNITS FOR THE SEASON..............28 DEPARTURE.......+18 TOTAL HEATING UNITS LAST SEASON TO DATE..........1 DEPARTURE.......+27 COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021) TOTAL COOLING UNITS FOR YESTERDAY................4 DEPARTURE........-3 TOTAL COOLING UNITS FOR THE MONTH..............127 DEPARTURE........+7 TOTAL COOLING UNITS FOR THE SEASON.............506 DEPARTURE........-1 TOTAL COOLING UNITS LAST SEASON TO DATE........673 DEPARTURE......-167 PEAK WIND GUST (MPH): Official...................15 S @ 11:58 P.M. AEROVANE (south tower).....15 S @ 9:06 P.M. VECTOR #2 (south tower)....15 @ 11:58 P.M. DAVIS #2 (south tower).....16 S @ 9:00 P.M. ASOS...........OUT OF SERVICE D/T RENOVATIONS VECTOR #1......OUT OF SERVICE D/T RENOVATIONS DAVIS #1.......OUT OF SERVICE D/T RENOVATIONS RMY............OUT OF SERVICE D/T RENOVATIONS MERLIN.........OUT OF SERVICE D/T RENOVATIONS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................12 S @ 9:12 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............12 @ 11:59 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............13 S @ 9:07 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE VECTOR #1 AVERAGE..OUT OF SERVICE D/T RENOVATIONS MAXIMUM 2-MINUTE RMY AVERAGE........OUT OF SERVICE D/T RENOVATIONS AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL...... 6.4 NE [153 total miles] VECTOR #2................ 7.4 DAVIS #2................. 7.0 NE RMY.................OUT OF SERVICE D/T RENOVATIONS ASOS................OUT OF SERVICE D/T RENOVATIONS VECTOR #1...........OUT OF SERVICE D/T RENOVATIONS DAVIS #1............OUT OF SERVICE D/T RENOVATIONS PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.00 DEPARTURE....-0.13 TOTAL PRECIPITATION FOR THE MONTH.............2.76 DEPARTURE....+0.67 TOTAL PRECIPITATION FOR THE YEAR.............37.73 DEPARTURE....+5.20 PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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 08/01 77/58/68/-5/T/589/68 23 SSW AERO 24 SSW RMY N/A 08/02 78/61/70/-3/T/821/95 28 WNW AERO 28 WNW RMY N/A 08/03 76/60/68/-5/0.00/302/35 15 N AERO 16 N RMY N/A 08/04 75/61/68/-5/0.71/077/09 21 ESE AERO 21 ESE RMY N/A 08/05 68/61/65/-8/1.68/000/00 28 NE AERO 28 NE RMY N/A 08/06 85/62/74/+1/0.00/727/85 19 S AERO 20 WSW RMY N/A 08/07 88/66/77/+4/0.00/520/61 23 SW AERO 23 SW RMY N/A 08/08 80/67/74/+2/T/128/15 16 SW AERO 16 WNW RMY N/A 08/09 75/64/70/-2/0.25/076/09 22 ENE AERO 21 NE RMY N/A 08/10 78/63/71/-1/0.12/.../.. 19 S AERO 20 S RMY N/A 08/11 89/70/80/+8/0.00/.../.. 29 SSW AERO 28 SSW RMY N/A 08/12 91/71/81/+9/T/.../.. 36 WSW AERO 37 WSW RMY N/A TSTM 08/13 92/73/83/+11/0.00/.../.. 18 WSW AERO 18 WSW RMY N/A 08/14 87/69/78/+6/T/.../.. 25 W AERO 25 NNW RMY N/A 08/15 80/62/71/-1/0.00/.../.. 19 NNW AERO 20 NNW RMY N/A 08/16 78/59/69/-3/0.00/.../.. 15 S AERO 15 S RMY N/A 08/17 The low since midnight is 63F, the daily normal low is 63F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR AUGUST 17 HIGH 97F IN 1944 LOW 48F IN 1902 PRECIP 2.17 INCHES IN 1998 PEAK GUST 50e MPH SSW IN 1952, 50 MPH WNW IN 1962 RECORDS FOR AUGUST 18 HIGH 93F IN 2002 LOW 49F IN 1918, 1941 PRECIP 4.64 INCHES IN 1955 [DIANE] PEAK GUST 46 MPH WNW IN 2007 TODAY'S REPORT PREPARED BY: Benjamin Turner