BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, SEPTEMBER 8, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME WARM AND MORE HUMID UNDER MOSTLY SUNNY SKIES.... Warm air continues over the region today with temperatures reaching the low to mid 80s. The biggest change over yesterday is the increase in humidity. Dew point readings have been in the low to mid 60s all day, definitely more noticeable after the spectacular weather over the holiday weekend. Plenty of sunshine has been the theme today after some early morning clouds and fog burned off. Wind has been a non-story today with an average since 7 A.M. of only around 5 mph. The peak gust has only been about 15 mph. We could really use some rainfall as our precipitation deficit starts to mount. The departure for the year is getting close to 3 inches again, sitting at -2.82 inches as of this morning. The high so far today is 81F, 7 degrees above the daily normal max of 74F. The low since midnight is 61F, which is 4 degrees above the normal low of 57F. PRELIMINARY STATS FOR AUGUST 2020 TEMPERATURE, Deg. F Avg. Max. 82.5 [+3.3] Avg. Min. 64.3 [+2.5] Mean 73.4 [+2.9] 24-hour corrected mean: 72.3 Max. for month: 94F on the 10th Min. for month: 54F on the 31st HEATING DEGREE DAYS Total heating units: 2 [-14] Total for the season: 3 [-22] Total for last season: 12 COOLING DEGREE DAYS Total cooling units: 270 [+84] Total for the season: 757 [+220] Total for last season: 622 PRECIPITATION, Inches Total: 3.74 [-0.29] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed: 10.0 mph Avg. corrected wind speed: 10.6 mph Prevailing wind direction: SSW [12%] Peak gust and direction: 67 SSE on the 4th SUNSHINE: Campbell-Stokes card minutes: 15366 minutes of a possible 24780 or 62% Astronomical total minutes: 15940 minutes of a possible 25709 or 62% Today's Observations: 7 A.M. Weather: Vertical visibility 200 feet, sky obscured Temperature: 63F; Dew Point: 63F; Relative Humidity: 100% Wind: SSW at 6 kts, wind light Sea-level pressure: 30.17 ins. Hg: rising, then more rapidly Visibility: 1/4 mile, fog 6-hr Max temp: 63F 6-hr Min temp: 61F 24-hr Precip: 0.00 ins. BHO SA 1155 W2 X 1/4F 218/63/63/2106/017/ SUN OCLY DMLY VSBL WND LGT/ 8//// 53019 10063 20061 10 A.M. Weather: Scattered stratocumulus, thin broken cirrus, fog bank offshore NE-ENE Temperature: 74F; Dew Point: 64F; Relative Humidity: 71% Wind: SW at 5 kts, wind light Sea-level pressure: 30.14 ins. Hg: rising then falling Visibility: 40 miles, 20 miles NE-ENE 3-hr Precip: 0.00 ins. BHO SA 1455 20 SCT 250 -BKN 40 208/74/64/2205/014/ F BNK OFFSHR NE-ENE VSBY NE-ENE 20 WND LGT/ 8/501 53010 1 P.M. Weather: Thin broken cirrus, few cumulus distant all quadrants Temperature: 80F; Dew Point: 63F; Relative Humidity: 57% Wind: S at 5 kts, wind light and variable Sea-level pressure: 30.13 ins. Hg: rising, then falling Visibility: 50 miles 6-hr Max temp: 81F 6-hr Min temp: 63F 6-hr Precip: 0.00 ins. BHO SA 1755 250 -BKN 50 204/80/63/1705/013/ FEW CU DSNT ALQDS WND L/V/ 8/201 58004 10081 20063 SUMMARY FOR MONDAY, SEPTEMBER 7, 2020 TEMPERATURE (DEGREES F) MAX.....79 NORMAL.....75 MIN.....61 NORMAL.....58 MEAN....70 NORMAL.....66 DEPARTURE FROM 30-YEAR NORMAL................ +4 TOTAL DEPARTURE FOR THE MONTH................ +9 [+1.1 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY............ 5 DEPARTURE......+2 TOTAL COOLING UNITS FOR THE MONTH............ 25 DEPARTURE......+1 TOTAL COOLING UNITS FOR THE SEASON...........782 DEPARTURE....+221 TOTAL COOLING UNITS LAST SEASON TO DATE......634 DEPARTURE....+148 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................27 SSE AT 1:16 P.M. AERO.........................30 SSE AT 2:11 P.M. ASOS.........................27 S AT 3:09 P.M. DAVIS........................28 S AT 9:14 A.M. RMY 28 MERLIN 28 FASTEST MILE FOR YESTERDAY......................20 S AT 3:08 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................18 S AT 3:07 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................20 SSE AT 1:00 P.M. AVERAGE WIND SPEED AND DIRECTION..............12.5 S ASOS.......................12.7 DAVIS......................11.6 S [184 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE....-0.12 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.22 DEPARTURE....-0.61 ASOS..............0.24 TOTAL PRECIPITATION FOR THE YEAR..........33.03 DEPARTURE....-2.82 ASOS.............33.82 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 87/66/77/+5/0.00/866/100 18 S AERO 21 S RMY 19 08/02 85/69/77/+5/0.02/320/37 36 S AERO 37 S RMY 38 08/03 91/75/83/+11/0.00/715/83 36 WSW AERO 38 SW RMY 36 08/04 83/71/77/5/0.21/094/11 67 SSE AERO 71 S RMY 70 08/05 90/68/79/+7/0.00/668/78 28 SW AERO 30 SW RMY 29 08/06 84/65/75/3/0.00/701/82 20 W AERO 17 W RMY 19 08/07 79/65/72/0/T/136/16 16 NE AERO 16 NE RMY N/A 08/08 83/64/74/+2/0.00/612/72 20 S AERO 20 S RMY 19 08/09 90/65/78/+6/0.00/661/78 26 SSW AERO 26 SSW RMY 26 08/10 94/69/82/+11/0.00/727/86 22 W AERO 20 W RMY 20 08/11 92/72/82/+11/0.00/708/84 31 SSW AERO 35 SSW RMY 31 TSTM 08/12 93/74/84/+13/0.00/647/77 22 SSW AERO 22 SW RMY 19 08/13 88/71/80/+9/0.00/528/63 18 ENE AERO 18 NE RMY 18 08/14 82/67/75/+4/0.00/618/74 23 ENE AERO 23 ENE RMY N/A 08/15 67/62/65/-6/T/000/00 33 NNE AERO 32 NNE RMY N/A 08/16 69/62/66/-5/..../000/00 26 ENE AERO 28 ENE RMY 26 08/17 73/59/66/-5/..../339/41 25 NE AERO 24 NE RMY N/A 08/18 84/63/74/+3/..../784/95 23 W AERO 23 W RMY 24 08/19 81/59/70/0/0.03/526/64 26 W AERO 28 W RMY 27 08/20 80/56/68/-2/0.00/804/98 22 W AERO 21 W RMY 22 08/21 88/61/75/+5/0.00/719/88 28 SW AERO 26 SW RMY 28 08/22 85/66/76/+6/0.26/521/64 18 NNE AERO 16 S RMY 16 08/23 89/63/76/+6/2.21/552/68 60 WNW AERO 53 WNW RMY 58 TSTM HAIL 08/24 87/67/77/+7/0.00/493/61 18 S AERO 18 S RMY 19 TSTM 08/25 86/65/76/+7/0.01/492/61 35 NNW AERO 37 NNW RMY 35 08/26 74/56/65/-4/0.00/780/97 29 NW AERO 32 NW RMY N/A 08/27 68/57/63/-6/0.33/008/01 18 SSE AERO 20 SSE RMY 20 TSTM 08/28 80/59/70/+1/0.00/559/70 20 W AERO 20 W RMY N/A 08/29 74/65/70/+1/0.06/000/00 32 W AERO 32 W RMY N/A 08/30 75/57/66/-2/0.00/793/100 36 W AERO 36 W RMY N/A 08/31 75/54/65/-3/0.00/569/72 20 S AERO 20 S RMY 20 DAILY RECORDS FOR AUGUST 2020 8/23/20: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 89F, BREAKS PREVIOUS RECORD of 88F SET IN 1918, 1947, 1949, 1996 8/23/20: DAILY RECORD PRECIPITATION OF 2.21 INS, BREAKS PREVIOUS RECORD OF 2.09 INS SET IN 2010 8/23/20: DAILY RECORD PEAK WIND GUST OF 60 MPH, TIES PREVIOUS RECORD OF 60 MPH SET IN 1940 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/.../.. 22 SSE AERO 21 SE RMY 20 09/02 69/59/64/-4/.../.../.. 23 SSE AERO 23 SSE RMY 24 09/03 75/66/71/+4/.../.../.. 22 SSW AERO 21 SSW RMY n/a 09/04 82/62/72/+5/0.00/.../.. 26 WNW AERO 26 WNW RMY 25 09/05 76/55/66/-1/0.00/.../.. 25 W AERO 25 W RMY 24 09/06 78/58/68/+1/0.00/.../.. 24 W AERO 24 W RMY N/A 09/07 79/61/70/+4/0.00/.../.. 27 SSE AERO 30 SSE RMY 28 09/08 The low since midnight is 61F, the daily normal low is 57F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR SEPTEMBER 8 HIGH 97F IN 2015 LOW 42F IN 1978 PRECIP 1.51 INCHES IN 2011 PEAK GUST 45 MPH S IN 2012 RECORDS FOR SEPTEMBER 9 HIGH 92F IN 2015 LOW 41F IN 1938 PRECIP 1.97 INCHES IN 1969 PEAK GUST 52 MPH WNW IN 1969, NW IN 1978 TODAY'S REPORT PREPARED BY: Matt Douglas