BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, OCTOBER 21, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME MORNING FOG LED TO MOSTLY SUNNY CONDITIONS IN THE AFTERNOON.... We observed foggy conditions from this morning until the 1 P.M. observation. This quickly changed as skies are mostly clear, and the sun had broken through shortly after the usual observing hours. Visibility was limited to 3 miles, but we are now seeing over 40 miles. There was some rainfall overnight and this morning, leaving only 0.06 inches in total. This doesn't do much for our annual deficit of almost three and a half inches, but the month is still looking good at a 1.20 inch surplus.   The high so far today is 64F, 5 degrees above the daily normal minimum of 59F. The low since midnight is 56F, 15 degrees above the normal low of 41F. Today's Observations: 7 A.M. Weather: Drizzle and fog Temperature: 56F; Dew Point: 56F; Relative Humidity: 100% Wind: S at 14 kts Sea-level pressure: 30.33 ins. Hg: rising, then more slowly Visibility: 1/16th mile, fog 6-hr Max temp: 59F 6-hr Min temp: 56F 24-hr Precip: 0.04 ins. BHO SA 1155 X W3 1/16LF 270/56/56/0814/033/ LCTD/ 8//// 70004 53009 10059 20056 10 A.M. Weather: Fog Temperature: 58F; Dew Point: 58F; Relative Humidity: 100% Wind: Calm Sea-level pressure: 30.33 ins. Hg: falling steadily Visibility: 1/16 mile, fog 3-hr Precip: 0.02 ins. BHO SA 1455 X W3 1/16F 271/58/58/0000/033/ WND CALM/ 8//// 6002/ 58001 1 P.M. Weather: Broken stratus fractus, overcast altostratus Temperature: 63F; Dew Point: 63F; Relative Humidity: 100% Wind: WSW at 4 kts, light and variable Sea-level pressure: 30.28 ins. Hg: falling steadily Visibility: 3 miles, fog 6-hr Max temp: 64F 6-hr Min temp: 56F 6-hr Precip: 0.02 inches BHO SA 1755 15 BKN 65 OVC 3F 254/63/63/2404/028/ WND L/V/ 8/72/ 6002/ 58017 10064 20056 SUMMARY FOR TUESDAY, OCTOBER 20, 2020 TEMPERATURE (DEGREES F) MAX.....66   NORMAL.....59 MIN.....49   NORMAL.....41 MEAN....58   NORMAL.....50 DEPARTURE FROM 30-YEAR NORMAL.................+8 TOTAL DEPARTURE FOR THE MONTH................+54 [+2.5 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY............. 7  DEPARTURE..... -8 TOTAL HEATING UNITS FOR THE MONTH............177  DEPARTURE.....-59 TOTAL HEATING UNITS FOR THE SEASON...........275  DEPARTURE....-103 TOTAL HEATING UNITS LAST SEASON TO DATE......323  DEPARTURE.....-48 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY............. 0  DEPARTURE...... 0                   TOTAL COOLING UNITS FOR THE MONTH............. 1  DEPARTURE..... -4 TOTAL COOLING UNITS FOR THE SEASON...........831  DEPARTURE....+229 TOTAL COOLING UNITS LAST SEASON TO DATE......682  DEPARTURE....+149 PEAK WIND GUST FOR YESTERDAY (MPH)                    420C/Official...............22 S   AT  11:48 A.M.                      AEROVANE (south tower)......22 S   AT   9:10 A.M.                    ASOS........................23 S   AT  11:50 A.M.                    DAVIS #1....................23 WSW AT  11:13 A.M.                    DAVIS #2 (south tower)......27 SSE AT   9:13 A.M.                    RMY.........................22                    MERLIN......................22 FASTEST MILE FOR YESTERDAY.....................17 S   AT  11:56 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................16 S   AT  11:53 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE..............15 S   AT   6:38 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE..............19 S   AT   9:11 A.M. AVERAGE WIND SPEED AND DIRECTION.............8.2 S  [199 total miles]                            ASOS......................9.2                    DAVIS #1..................8.5 S    [190 deg.]                    DAVIS #2..................9.9 S    [182 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.04  DEPARTURE....-0.11                          ASOS..............0.03 TOTAL PRECIPITATION FOR THE MONTH..........4.18  DEPARTURE....+1.20                          ASOS..............4.16 TOTAL PRECIPITATION FOR THE YEAR..........38.60  DEPARTURE....-3.46                          ASOS.............39.37 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  75/56/66/+9/0.00/.../..             28 SW   AERO 28 SW   RMY N/A 10/02  63/49/56/-1/0.02/.../..             20 NW   AERO 21 NW   RMY 20 10/03  65/45/55/-1/0.00/.../..             19 WNW  AERO 19 WNW  RMY 19 10/04  65/45/55/-1/0.00/.../..             17 ESE  AERO 18 ESE  RMY 18 10/05  62/52/57/+1/0.00/.../..             17 ENE  AERO 17 ENE  RMY N/A 10/06  69/51/60/+5/0.00/.../..             28 S    AERO 28 S    RMY 29 10/07  73/50/62/+7/0.14/.../..             76 W    AERO 74 W    RMY 70  TSTM 10/08  61/42/52/-2/0.00/.../..             41 W    AERO 41 W    RMY N/A 10/09  60/37/49/-5/0.00/.../..             25 SSW  AERO 28 SSW  RMY N/A 10/10  75/52/64/+10/0.00/.../..            40 SSW  AERO 40 SSW  RMY 38 10/11  64/47/56/+3/0.00/.../..             32 NNW  AERO 35 NNW  RMY N/A 10/12  52/48/50/-3/T/.../..                28 E    AERO 27 E    RMY N/A 10/13  57/49/53/0/1.74/.../..              32 E    AERO 33 E    RMY N/A 10/14  67/47/57/+5/0.00/.../..             23 WNW  AERO 25 WNW  RMY N/A 10/15  71/50/61/+9/0.00/.../..             43 S    AERO 46 S    RMY 42 10/16  68/48/58/+7/..../.../..             28 S    AERO 30 S    RMY N/A 10/17  56/39/48/-3/..../.../..             35 WNW  AERO 40 WNW  RMY 37 10/18  60/46/53/+2/0.00/.../..             20 ESE  AERO 21 ESE  RMY 20 10/19  61/46/54/+4/0.00/.../..             16 ESE  AERO 16 SSE  RMY N/A 10/20  66/49/58/+8/0.00/.../..             22 S    AERO 22 S    RMY 22 10/21 The low since midnight is 56F, the daily normal low is 41F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR OCTOBER 21 HIGH 79F IN 1979 LOW 24F IN 1974 PRECIP 2.39 INCHES IN 1944 SNOWFALL TRACE IN 1895,1907,1940 PEAK GUST 69e MPH S IN 1976 RECORDS FOR OCTOBER 22 HIGH 85F IN 1979 LOW 22F IN 1940 PRECIP 2.38 INCHES IN 2014 SNOWFALL TRACE IN 1969, 2010 PEAK GUST 67 MPH ESE IN 1988 TODAY'S REPORT PREPARED BY: Benjamin Turner