BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, OCTOBER 10, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME A WARM AND WINDY, BUT DRY DAY AT BLUE HILL... Plenty of sunshine has been observed today with only some broken high clouds around this morning. Also have been observing a thin smoke layer aloft. Temperatures have responded quite effectively to the sunshine and south- southwest wind. The high so far this afternoon has reached the mid 70s. The wind has been busy today averaging around 21 mph since 7 A.M. The peak gust so far today has been 37 mph. Visibility has been decreasing from 50 miles this morning to only around 35-40 miles this afternoon. This is due to an increase in haziness as the dew point has risen from the upper 40s to the mid 50s. The high so far today is 75, 13 degrees above the daily normal of 62F. The low since midnight is 52F, which is 7 degrees above the normal low of 45F. PRELIMINARY STATS FOR SEPTEMBER 2020 TEMPERATURE, Deg. F Avg. Max. 73.2 [+1.6] Avg. Min. 54.9 [+0.3] Mean      64.1 [+1.0] 24-hour corrected mean: 63.6 Max. for month: 82F on the 8th Min. for month: 39F on the 22nd HEATING DEGREE DAYS Total heating units:    95 [-22] Total for the season:   98 [-44] Total for last season:  93 COOLING DEGREE DAYS Total cooling units:     73  [+13] Total for the season:   830  [+233] Total for last season:  680 PRECIPITATION, Inches Total: 1.61 [-2.45] Greatest in 24 hrs: 1.02 ins. on 29th-30th WIND, mph Avg. uncorrected wind speed: 10.6 mph Avg. corrected wind speed:   11.1 mph Prevailing wind direction:   S [20%] Peak gust and direction:     71 S on the 30th SUNSHINE: Campbell-Stokes card minutes: 12150 minutes of a possible 21582 or 56% Astronomical total minutes: 12593 minutes of a possible 22403 or 56% Today's Observations: 7 A.M. Weather: Broken cirrostratus/cirrocumulus, thin broken cirrus Temperature: 58F; Dew Point: 48F; Relative Humidity: 69% Wind: SW at 18G25 kts, peak wind SSW 26kts at 6:10 A.M. Sea-level pressure: 30.00 ins. Hg: rising, then steady Visibility: 50 miles, hazy 6-hr Max temp: 58F 6-hr Min temp: 53F 24-hr Precip: 0.00 ins. BHO SA 1155 E200 BKN 250 -BKN 50 158/58/48/2218G25/000/ HAZY PK WND 2126/10/ 8/009 51004 10058 20053 10 A.M. Weather: Scattered cirrostratus, thin sctattered cirrus, few stratocumulus distant SE-SSW, thin smoke layer aloft SW-NW Temperature: 68F; Dew Point: 52F; Relative Humidity: 56% Wind: SSW at 18G30 kts, peak wind SSW 30 kts at 10:53 A.M. Sea-level pressure: 29.94 ins. Hg: falling, then more rapidly Visibility: 50 miles, hazy 3-hr Precip: 0.00 ins. BHO SA 1455 200 SCT 250 -SCT 50 140/68/52/2118G30/994/ FEW SC DSNT SE-SSW THN K LYR ALF SW-NW HAZY PK WND 2130/53/ 8/508 58018 1 P.M. Weather: Clear, few cumulus distant SE-SSW, few cirrus all quadrants, thin smoke layer aloft Temperature: 75F; Dew Point: 55F; Relative Humidity: 50% Wind: SSW at 20G30 kts, peak wind SSW 31 kts at 12:22 P.M. Sea-level pressure: 29.86 ins. Hg: falling, then more rapidly Visibility: 40 miles, hazy 6-hr Max temp: 75F 6-hr Min temp: 58F 6-hr Precip: 0.00 ins. BHO SA 1755 CLR 40 113/75/55/2120G30/986/ FEW CU DSNT SE-SSW FEW CI ALQDS THN K LYR ALF HAZY PK WND 2131/22/ 8/201 58027 10075 20058 SUMMARY FOR FRIDAY, OCTOBER 9, 2020 TEMPERATURE (DEGREES F) MAX.....60   NORMAL.....63 MIN.....37   NORMAL.....45 MEAN....49   NORMAL.....54 DEPARTURE FROM 30-YEAR NORMAL................ -5 TOTAL DEPARTURE FOR THE MONTH................+12 [+1.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY.............16  DEPARTURE..... +5 TOTAL HEATING UNITS FOR THE MONTH.............74  DEPARTURE.....-15 TOTAL HEATING UNITS FOR THE SEASON...........172  DEPARTURE.....-59 TOTAL HEATING UNITS LAST SEASON TO DATE......182  DEPARTURE.....-10 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY............. 0  DEPARTURE...... 0                   TOTAL COOLING UNITS FOR THE MONTH............. 1  DEPARTURE..... -2 TOTAL COOLING UNITS FOR THE SEASON...........831  DEPARTURE....+231 TOTAL COOLING UNITS LAST SEASON TO DATE......682  DEPARTURE....+149 PEAK WIND GUST FOR YESTERDAY (MPH)                    420C/Official...............25 SSW AT  11:24 P.M.                      AERO........................28 SSW AT   7:31 P.M.                    ASOS........................27 SSW AT  11:25 P.M.                    DAVIS.......................26 SSW AT  11:02 P.M.                    RMY N/A  MERLIN N/A FASTEST MILE FOR YESTERDAY.....................21 SSW AT  11:36 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................18 S   AT  11:41 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................19 W   AT   2:09 P.M. AVERAGE WIND SPEED AND DIRECTION.............11.5 NW (276 total miles)                            ASOS......................11.5                    DAVIS.....................11.5 W [274 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..........0.16  DEPARTURE....-1.18                          ASOS..............0.12 TOTAL PRECIPITATION FOR THE YEAR..........34.58  DEPARTURE....-5.84                          ASOS.............35.33 PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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 09/01  76/59/68/0/0.00/698/88              22 SSE  AERO 21 SE   RMY 20 09/02  69/59/64/-4/0.18/102/13             23 SSE  AERO 23 SSE  RMY 24 09/03  75/66/71/+4/0.04/000/00             22 SSW  AERO 21 SSW  RMY N/A 09/04  82/62/72/+5/0.00/763/98             26 WNW  AERO 26 WNW  RMY 25 09/05  76/55/66/-1/0.00/760/98             25 W    AERO 25 W    RMY 24 09/06  78/58/68/+1/0.00/356/46             24 W    AERO 24 W    RMY N/A 09/07  79/61/70/+4/0.00/632/82             27 SSE  AERO 30 SSE  RMY 28 09/08  82/61/72/+6/0.00/545/71             17 S    AERO 16 S    RMY 17 09/09  80/62/71/+5/0.00/214/28             16 S    AERO 15 S    RMY 16 09/10  81/69/75/+10/0.28/015/02            21 SSW  AERO 21 SSW  RMY N/A 09/11  72/55/64/-1/0.01/152/20             25 N    AERO 25 N    RMY N/A 09/12  68/51/60/-5/0.00/666/88             21 ENE  AERO 21 ENE  RMY 21 09/13  74/53/64/0/0.00/611/81              26 SSW  AERO 26 SSW  RMY 26 09/14  74/50/62/-2/0.00/511/68             29 NNW  AERO 33 NNW  RMY 30 09/15  64/44/54/-10/0.00/583/78            18 S    AERO 18 S    RMY N/A 09/16  72/49/61/-2/0.00/603/81             31 SSW  AERO 31 SSW  RMY 31 09/17  76/57/67/+4/0.00/453/61             26 WSW  AERO 28 W    RMY N/A 09/18  64/48/56/-6/0.00/163/22             28 NE   AERO 30 NNW  RMY N/A 09/19  59/42/51/-11/0.00/722/98            23 N    AERO 23 N    RMY N/A 09/20  58/40/49/-13/0.00/602/82            25 NE   AERO 25 NE   RMY 27 09/21  61/41/51/-10/0.00/694/95            29 NE   AERO 27 NE   RMY 29 09/22  63/39/51/-10/0.00/022/03            28 NNW  AERO 30 NNW  RMY 29 09/23  78/50/64/+4/0.00/617/85             31 NW   AERO 32 WNW  RMY 32 09/24  76/57/67/+7/0.00/347/48             20 SW   AERO 18 WSW  RMY 19 09/25  77/57/67/+7/0.00/655/91             18 ENE  AERO 18 WSW  RMY N/A 09/26  77/57/67/+8/0.00/516/72             21 S    AERO 21 S    RMY 21 09/27  79/64/72/+13/0.01/121/17            24 S    AERO 25 S    RMY 24 09/28  78/64/71/+13/0.07/199/28            24 SSE  AERO 24 S    RMY 25 09/29  76/62/69/+11/0.01/234/33            30 S    AERO 30 S    RMY N/A 09/30  72/56/64/+6/1.01/395/56             71 S    AERO 88 S    RMY N/A 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  The low since midnight is 52F, the daily normal low is 45F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR OCTOBER 10 HIGH 85F IN 1949 LOW 27F IN 1929 PRECIP 2.02 INCHES IN 1998 SNOWFALL 6.8 INCHES IN 1979 (RECORD FOR MONTH) PEAK GUST 59 MPH WNW IN 1958 RECORDS FOR OCTOBER 11 HIGH 80F IN 1919,1949 LOW 28F IN 1993 PRECIP 0.96 INCHES IN 1903 SNOWFALL (NONE) PEAK GUST 66e MPH WNW IN 1941 TODAY'S REPORT PREPARED BY: Matt Douglas