BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, OCTOBER 19, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0602E SUNSET:  1655E FAIR WEATHER CONTINUES WITH COOL AND BREEZY CONDITIONS.... We recorded our lowest temperature of the season thus far this morning with a low of 40F (39.7F). This is the coldest temperature recorded since back on May 8th when we also had a low of 40F (39.8F)! Despite the cool air mass in place, plenty of sunshine has been observed today along with rather dry air. The dewpoint has been holding in the mid 30s all day. Combined with the breeze, there is definitely a chill in the air. Speaking of breeziness, a busy west-northwest wind has been blowing once again today averaging around 15 mph! The peak gust thus far for today is 35 mph. Visibility has been excellent, holding at around 80 miles all day. The high so far today is 58F, 2 degrees below the normal max of 60F. The low since midnight is 40F, 3 degrees below the normal low of 43F. -------------------------------------------------------------- Today's Observations: 7 A.M. Weather: Clear, few stratocumulus distant all quadrants, few altocumulus distant WNW-N-ENE, few cirrus distant NNW-N Temperature: 41F; Dew Point: 36F; Relative Humidity: 82% Wind: W @ 12G17 kts Sea-level pressure: 1011.9 mb; 29.88 in. Hg: rising, then more rapidly Visibility: 80 miles 6-hr Max temp: 42F 6-hr Min temp: 40F 24-hr Precip: 0.00 ins. BHO SA 1155 CLR 80 119/41/36/2712G17/988/ FEW SC DSNT ALQDS FEW AC DSNT WNW-N-ENE FEW CI DSNT NNW-N/ 8/571 53006 10042 20040 10 A.M. Weather: Clear, few stratocumulus all quadrants, few altocumulus NNW-E Temperature: 51F; Dew Point: 36F; Relative Humidity: 55% Wind: WNW @ 13G21 kts Sea-level pressure: 1011.3 mb; 29.86 in Hg; rising, then falling Visibility: 80 miles 3-hr Precip: 0.00 ins. BHO SA 1455 CLR 80 113/51/36/2913G21/986/ FEW SC ALQDS FEW AC NNW-E/ 8/570 58006 1 P.M. Weather: Clear, few stratocumulus distant NW-NE-SE, few altocumulus distant all quadrants Temperature: 57F, Dew point: 36F; Relative Humidity: 46% Wind: WNW @ 14G21 kts, peak wind WNW 35 mph at 12:24 P.M. Sea-level pressure: 1009.1 mb; 29.80 in Hg; falling, then more rapidly Visibility: 80 miles 6-hr Max temp: 58F 6-hr Min temp: 41F 6-hr Precip: 0.00 ins. BHO SA 1755 CLR 80 091/57/36/2914G21/980/ FEW SC DSNT NW-NE-SE FEW AC DSNT ALQDS PK WND 2930/24/ 8/570 58022 10058 20041 SUMMARY FOR MONDAY, OCTOBER 18, 2021 TEMPERATURE (DEGREES F) MAX.......60     NORMAL.....60 MIN.......42     NORMAL.....43 MEAN......51     NORMAL.....52 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL.............. -1 TOTAL DEPARTURE FOR THE MONTH..........................+91 [+4.9 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY...............14  DEPARTURE........+1 TOTAL HEATING UNITS FOR THE MONTH...............94  DEPARTURE.......-94 TOTAL HEATING UNITS FOR THE SEASON.............168  DEPARTURE......-138 TOTAL HEATING UNITS LAST SEASON TO DATE........257  DEPARTURE.......-89 COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021) TOTAL COOLING UNITS FOR YESTERDAY................0  DEPARTURE.........0 TOTAL COOLING UNITS FOR THE MONTH................3  DEPARTURE........-3 TOTAL COOLING UNITS FOR THE SEASON.............717  DEPARTURE.......+40 TOTAL COOLING UNITS LAST SEASON TO DATE........831  DEPARTURE......-114 PEAK WIND GUST (MPH):                      Official...................31 NW  @  5:48 P.M.                      AEROVANE (south tower).....32 NW  @  5:58 P.M.                      VECTOR #2 (south tower)....34     @  5:48 P.M.                      DAVIS #2 (south tower).....28 WNW @ 11:11 A.M.                      RMY #2 (south tower).......33 NW  @  5:58 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 #1.........OUT OF SERVICE D/T RENOVATIONS                        MERLIN.........OUT OF SERVICE D/T RENOVATIONS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................22 WNW @ 12:15 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............22     @ 11:13 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............22 NW  @ 12:13 P.M. MAXIMUM 2-MINUTE RMY #2 AVERAGE.................22 NW  @ 11:14 A.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 #1 AVERAGE.....OUT OF SERVICE D/T RENOVATIONS AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL........12.8 WNW [308 total miles]                      VECTOR #2..................13.5                      DAVIS #2...................13.3 NW                      RMY #2.....................13.2 NW                      RMY #1..............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....-0.19 TOTAL PRECIPITATION FOR THE MONTH.............2.42  DEPARTURE....-0.69 TOTAL PRECIPITATION FOR THE YEAR.............49.40  DEPARTURE....+7.88 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   64/44/54/-4/0.00/583/83          20 WNW AERO 20 WNW RMY N/A 10/02   73/47/60/+2/0.00/567/81          24 WSW AERO 23 WSW RMY N/A 10/03   65/55/60/+3/0.09/070/10          19 E   AERO 19 E   RMY N/A 10/04   59/51/55/-2/1.69/000/00          30 E   AERO 30 E   RMY N/A 10/05   58/50/54/-3/0.30/000/00          22 NNE AERO 23 NE  RMY N/A 10/06   69/50/60/+4/0.00/407/59          15 N   AERO 16 N   RMY N/A 10/07   73/55/64/+8/0.00/550/80          15 WSW AERO 15 W   RMY N/A 10/08   69/55/62/+7/T/616/90             24 ENE AERO 23 ENE RMY N/A 10/09   62/54/58/+3/0.01/273/40          23 E   AERO 23 E   RMY N/A 10/10   62/54/58/+3/T/000/00             22 E   AERO 21 E   RMY N/A 10/11   67/56/62/+8/0.01/.../..          20 NE  AERO 21 NE  RMY N/A 10/12   72/54/63/+9/0.00/.../..          15 SW  AERO 15 SW  RMY N/A 10/13   75/55/65/+11/0.00/.../..         18 SW  AERO 18 SW  RMY N/A 10/14   73/56/65/+12/0.00/.../..         19 N   AERO 20 N   RMY N/A 10/15   74/55/67/+14/0.00/.../..         24 S   AERO 24 SSW RMY N/A 10/16   73/59/66/+14/0.06/.../..         43 S   AERO 50 S   RMY 44 10/17   62/47/55/+3/0.25/.../..          32 WNW AERO 31 WNW RMY 31 10/18   60/42/51/-1/0.01/.../..          31 NW  AERO 32 NW  RMY 33 10/19   The low since midnight is 40F, the daily normal low is 43F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR OCTOBER 19 HIGH 81F IN 1945 LOW 21F IN 1922 PRECIP 3.64 INCHES IN 1932 SNOWFALL 1.0 INCHES IN 1972 PEAK GUST 66 MPH SSW IN 1967 RECORDS FOR OCTOBER 20 HIGH 78F IN 1965,1984 LOW 24F IN 1972 PRECIP 7.10 INCHES IN 1996 (RECORD FOR MONTH) SNOWFALL TRACE IN 1934,1943 PEAK GUST 63 MPH W IN 1966 TODAY'S REPORT PREPARED BY: Matt Douglas