BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, SEPTEMBER 23, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME HOT AND HUMID TODAY ON THIS FIRST DAY OF ASTRONOMICAL FALL, COULD REALLY USE SOME RAIN... The main story of today is the very warm to hot temperatures and high dew points (especially for this time of year). We have reached the upper 80s so far this afternoon with a max through 1pm EST of 88F. Dew points have risen into the upper 60s making it feel rather uncomfortable outside. The only saving grace has been the breeze which has gusted as high as 26 mph so far. The other story is the lack of rainfall this month, with only 0.98" for the month to date, we are running almost 2 inches below normal for the month. The dry conditions are starting to show stress on the trees. Those that are showing color changes already are rather dull looking. Hopefully we can get a little rain over the next few weeks to help brighten the colors in time for peak foliage mid to late next month. Our normal high temperature for today is 69F, thus the 88F so far today is 19 degrees above normal. Our low since midnight was 65F, which is 13 degrees above our normal low of 52F. Today's Observations: 7 A.M. Weather: Scattered Altocumulus, scattered Cirrocumulus, broken cirrus; few stratocumulus distant E-SE Temperature: 69F; Dew Point: 65F; Wind: SSW at 14 kts, gusting to 20 kts Sea-level pressure: 29.89 ins. Hg, falling, then more slowly Visibility: 30 miles, Hazy 6-hr Max temp: 69F 6-hr Min temp: 65F 24-hr Precip: 0.00 ins. BHO SA 1155 70 SCT E200 BKN 250 BKN 30 121/69/65/2014G20/989/ FEW SC DSNT E-SE HAZY/ 8/539 55003 10069 20065 10 A.M. Weather: Scattered cirrocumulus, broken cirrus; few altocumulus distant E-SE-SW and W Temperature: 79F; Dew Point: 66F; Wind: SW at 15 kts, gusting to 23 kts Sea-level pressure: 29.85 ins. Hg, falling, then more rapidly Visibility: 25 miles, Hazy 3-hr Precip: 0.00 ins. BHO SA 1455 180 SCT E250 BKN 25 108/79/66/2215G23/985/ FEW AC E-SE-SW AND W HAZY/ 8/039 58013 1 P.M. Weather: Scattered cirrocumulus, Thin scattered cirrus, few cumulus distant W Temperature: 86F; Dew Point: 68F; Wind: SSW at 13 kts, gusting to 22 kts Sea-level pressure: 29.78 ins. Hg, falling, then more rapidly Visibility: 30 miles, Hazy 6-hr Max temp: 88F 6-hr Min temp: 69F 6-hr Precip: 0.00 ins. BHO SA 1755 200 SCT 250 –SCT 30 083/86/68/2014G22/978/ FEW CU DSNT NW HAZY/ 8/209 58025 10088 20069 SUMMARY FOR SUNDAY, SEPTEMBER 22, 2019 TEMPERATURE (DEGREES F) MAX.....85   NORMAL.....69 MIN.....62   NORMAL.....52 MEAN....74   NORMAL.....61 DEPARTURE FROM 30-YEAR NORMAL.....................+13 TOTAL DEPARTURE FOR THE MONTH.....................-16 [-0.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON AUG TO JUL) TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE.........-5 TOTAL HEATING UNITS FOR THE MONTH..............64   DEPARTURE.........+2 TOTAL HEATING UNITS FOR THE SEASON.............76   DEPARTURE.........+1 TOTAL HEATING UNITS LAST SEASON TO DATE........33   DEPARTURE........+43 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............9   DEPARTURE.........+8 TOTAL COOLING UNITS FOR THE MONTH..............41   DEPARTURE........-12 TOTAL COOLING UNITS FOR THE SEASON............660   DEPARTURE........+70 TOTAL COOLING UNITS LAST SEASON TO DATE.......855   DEPARTURE.......-195 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................24 SW  AT  3:05 P.M.                    AERO.........................23 SW  AT  3:04 P.M.                    ASOS.........................24 SW  AT  3:05 P.M.                    DAVIS........................23 SW  AT 12:21 P.M. RMY 25 FASTEST MILE FOR YESTERDAY......................17 SW  AT 12:26 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................17 SW  AT 12:24 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................17 SW  AT 12:26 P.M. AVERAGE WIND SPEED AND DIRECTION................11.5 SSW                    ASOS.........................11.8                    DAVIS........................11.2 SW [220 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.14                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.98  DEPARTURE......-1.89                          ASOS..............0.96 TOTAL PRECIPITATION FOR THE YEAR..........38.13  DEPARTURE......+0.23                          ASOS.............37.99 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 9/01  73/56/65/-3/0.00/.../..                21 ENE AERO 14 ENE RMY 18 9/02  75/57/66/-2/0.37/.../..                39 W   AERO 41 W   RMY 41 9/03  77/61/69/+2/0.00/.../..                18 S   AERO 16 S   RMY N/A 9/04  83/61/72/+5/0.00/.../..                30 SW  AERO 28 SW  RMY 30 9/05  68/54/61/-6/0.00/.../..                23 NW  AERO 17 NW  RMY N/A 9/06  65/56/61/-6/0.03/.../..                37 ENE AERO 36 ENE RMY 36 9/07  70/51/61/-5/0.27/.../..                37 N   AERO 37 N   RMY N/A 9/08  73/53/63/-3/0.00/.../..                25 W   AERO 21 W   RMY N/A 9/09  71/54/63/-3/0.00/.../..                17 SE  AERO 16 SE  RMY 16 9/10  73/57/65/0/0.00/.../..                 25 S   AERO 25 S   RMY N/A 9/11  83/63/73/+8/0.00/.../..                31 SW  AERO 32 SW  RMY N/A 9/12  70/52/61/-4/0.11/.../..                29 ENE AERO 28 ENE RMY 28 9/13  65/49/57/-7/0.00/.../..                29 ENE AERO 27 ENE RMY 27 9/14  69/49/59/-5/0.19/.../..                36 S   AERO 37 S   RMY 37 9/15  78/62/70/+6/0.00/.../..                24 W   AERO 23 W   RMY 22 9/16  72/54/63/0/0.00/.../..                 25 WNW AERO 23 WNW RMY 25 9/17  67/49/58/-5/0.00/.../..                23 NW  AERO 23 N   RMY N/A 9/18  61/49/55/-7/0.00/.../..                26 NE  AERO 25 NE  RMY 25 9/19  67/43/55/-7/0.00/.../..                17 NE  AERO 18 NE  RMY N/A 9/20  78/50/64/+2/0.00/.../..                21 W   AERO 18 W   RMY 20 9/21  83/60/72/+11/0.00/.../..               21 WNW AERO 18 WNW RMY N/A 9/22  85/62/74/+13/0.00/.../..               24 SW  AERO 23 SW  RMY 25 9/23  The low since midnight is 65F, normal daily minimum is 52F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR SEPTEMBER 23 HIGH 93F IN 1895,1914 LOW 33F IN 1904 PRECIP 2.67 INCHES IN 1994 PEAK GUST 62 MPH SSW IN 1989 RECORDS FOR SEPTEMBER 24 HIGH 87F IN 1959 LOW 33F IN 1885,1950,1963 PRECIP 1.19 INCHES IN 1955 PEAK GUST 54e MPH SW IN 1940 TODAY'S REPORT PREPARED BY: Matt Douglas