BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, AUGUST 7, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0443E SUNSET:  1856E HOT AND HUMID WEATHER CONTINUES.... After the heat and humidity returned yesterday, the same theme continues today with temperatures reaching the upper 80s here on the summit, but low 90s in the lower elevations. The dew point reached the low 70s by late morning and has been hanging around that level into the afternoon hours. So definitely a very humid to almost oppressive feel out there. Visibility has been limited to only 20-30 miles all day thanks to haziness in the humid air. The high so far today is 88F, 7 degrees above the daily normal maximum of 81F. The low so far today is 66F, which is 2 degrees above the daily normal minimum of 64F. ----------------------------------------------- PRELIMINARY STATS FOR JULY 2021 TEMPERATURE, Deg. F Avg. Max. 76.3 [-5.4] Avg. Min. 60.4 [-2.5] Mean      68.8 [-3.9] 24-hour corrected mean: 67.9 Max. for month: 90F on the 16th Min. for month: 52F on the 31st HEATING DEGREE DAYS Total heating units:     28 [+21] Total for the season:    28 [+21] Total for last season:    1 COOLING DEGREE DAYS Total cooling units:     153 [-95] Total for the season:    379 [-8] Total for last season:   487 PRECIPITATION, Inches Total: 11.59 [+8.12] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed:  9.0 mph Avg. corrected wind speed:    9.7 mph Prevailing wind direction:   NE [14%] Peak gust and direction:     63 NW on the 7th SUNSHINE: Campbell-Stokes card minutes: 11574 minutes of a possible 26682 or 43% Astronomical total minutes: 12005 minutes of a possible 27732 or 43% ----------------------------------------------- Today's Observations: 7 A.M. Weather: Thin broken cirrus Temperature: 70F; Dew Point: 64F; Relative Humidity: 81% Wind: SW @ 7kts Sea-level pressure: 30.09 in. Hg; rising, then steady Visibility: 30 miles, hazy 6-hr Max temp: 70F 6-hr Min temp: 66F 24-hr Precip: 0.00 ins. BHO SA 1155 E250 -BKN 30 190/70/64/2307/009/ HAZY/ 8/001 51003 10070 20066 10 A.M. Weather: Thin broken cirrus Temperature: 82F; Dew Point: 71F; Relative Humidity: 70% Wind: SW  @ 4 kts, wind light Sea-level pressure: 30.07 in Hg; falling, then more slowly Visibility: 20 miles, hazy 3-hr Precip: 0.00 ins. BHO SA 1455 E250 -BKN 20 184/82/71/2304/007/ HAZY/ 8/001 56006 1 P.M. Weather: Thin broken cirrus, few cumulus all quadrants, few altocumulus distant WSW-W Temperature: 85F, Dew point: 70F; Relative Humidity: 61% Wind: SW @ 7 kts Sea-level pressure: 30.03 in Hg; falling, then more rapidly Visibility: 20 miles, hazy 6-hr Max temp: 88F 6-hr Min temp: 70F 6-hr Precip: 0.00 ins. BHO SA 1755 E250 -BKN 20 170/85/70/2307/003/ FEW CU ALQDS FEW AC DSNT WSW-W HAZY/ 8/271 58014 10088 20070 SUMMARY FOR FRIDAY, AUGUST 6, 2021 TEMPERATURE (DEGREES F) MAX.......85     NORMAL.....81 MIN.......62     NORMAL.....64 MEAN......74     NORMAL.....73 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL...........+1 TOTAL DEPARTURE FOR THE MONTH......................-25 [-4.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE.........0 TOTAL HEATING UNITS FOR THE MONTH................0  DEPARTURE........-1 TOTAL HEATING UNITS FOR THE SEASON..............28  DEPARTURE.......+20 TOTAL HEATING UNITS LAST SEASON TO DATE..........1  DEPARTURE.......+27 COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021) TOTAL COOLING UNITS FOR YESTERDAY................9  DEPARTURE........+1 TOTAL COOLING UNITS FOR THE MONTH...............23  DEPARTURE.......-24 TOTAL COOLING UNITS FOR THE SEASON.............402  DEPARTURE.......-32 TOTAL COOLING UNITS LAST SEASON TO DATE........565  DEPARTURE......-163 PEAK WIND GUST (MPH):                      Official...................19 S   @  6:00 P.M.                      AEROVANE (south tower).....20 WSW @  3:23 A.M.                      VECTOR #2 (south tower)....21     @  3:22 A.M.                      DAVIS #2 (south tower).....21 S   @  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............OUT OF SERVICE D/T RENOVATIONS                        MERLIN.........OUT OF SERVICE D/T RENOVATIONS FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................14 S   @  5:36 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............16     @  4:51 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............15 SSW @  4:53 P.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 AVERAGE........OUT OF SERVICE D/T RENOVATIONS AVERAGE WIND SPEED AND DIRECTION:                      CONTACTING/OFFICIAL...... 8.8 WSW [211 total miles]                      VECTOR #2................ 9.7                      DAVIS #2................. 9.4 SW                      RMY.................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....-0.14 TOTAL PRECIPITATION FOR THE MONTH.............2.39  DEPARTURE....+1.59 TOTAL PRECIPITATION FOR THE YEAR.............37.36  DEPARTURE....+6.12 PRELIMINARY CLIMATE SUMMARY FOR JULY 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 07/01   80/65/73/+2/0.74/155/17           22 W   AERO 20 WSW  RMY 21 07/02   65/55/60/-11/1.49/000/00          37 NE  AERO 36 NE   RMY 39 07/03   56/54/55/-17/1.98/000/00          41 NE  AERO 44 NE   RMY 45 TSTM 07/04   66/54/60/-12/0.16/191/21          26 ENE AERO 23 ENE  RMY 26 07/05   74/53/64/-8/0.01/546/60           26 SSW AERO 28 SSW  RMY 27 07/06   87/66/77/+5/0.26/255/28           37 W   AERO 48 W    RMY 38 TSTM 07/07   88/88/77/+5/0.77/699/77           63 NW  AERO 75 NW   RMY 70 TSTM 07/08   67/59/63/-9/0.38/109/12           46 W   AERO 46 W    RMY 51 TSTM 07/09   73/62/68/-5/3.02/163/18           40 WNW AERO 44 WNW  RMY 43 07/10   71/63/67/-6/0.07/109/12           23 NE  AERO 21 NNE  RMY 22 07/11   81/61/71/-2/T/325/36              21 SW  AERO 19 S    RMY N/A 07/12   67/61/64/-9/1.01/000/00           31 ENE AERO 31 ENE  RMY N/A 07/13   66/60/63/-10/0.02/000/00          19 E   AERO 18 E    RMY N/A 07/14   80/62/71/-2/0.01/216/24           19 S   AERO 18 S    RMY N/A 07/15   88/67/78/+5/0.00/844/94           19 WSW AERO 18 SSW  RMY N/A 07/16   90/70/80/+7/0.04/609/68           36 NNW AERO 39 NNW  RMY N/A TSTM 07/17   78/64/71/-2/0.34/394/44           26 ENE AERO 25 ENE  RMY N/A TSTM 07/18   74/63/69/-4/0.15/000/00           22 NE  AERO 22 NE   RMY N/A TSTM 07/19   71/63/67/-6/0.07/027/03           17 ENE AERO 17 ENE  RMY N/A 07/20   83/64/74/+1/0.00/730/82           23 NW  AERO 23 NW   RMY N/A 07/21   79/62/71/-2/0.16/577/65           26 NNW AERO 23 NNW  RMY N/A TSTM 07/22   79/58/69/-4/T/656/74              20 WNW AERO 20 WNW  RMY N/A 07/23   79/62/71/-2/0.00/708/80           22 S   AERO 21 S    RMY N/A TSTM 07/24   78/59/69/-4/0.00/830/94           19 S   AERO 18 S    RMY N/A 07/25   71/64/68/-5/0.08/009/01           40 SSW AERO 41 SSW  RMY N/A 07/26   87/67/77/+4/0.01/765/87           27 WSW AERO 25 WNW  RMY N/A 07/27   87/65/76/+3/0.56/754/86           55 NW  AERO 58 NW   RMY N/A TSTM 07/28   72/61/67/-6/0.06/446/51           18 NNE AERO 18 NNE  RMY N/A 07/29   77/61/69/-4/0.19/323/37           39 S   AERO 40 S    RMY N/A 07/30   78/58/68/-5/0.01/714/82           31 NW  AERO 31 NW   RMY N/A 07/31   74/52/63/-10/0.00/851/98          24 WNW AERO 25 WNW  RMY N/A RECORDS FOR JULY: JULY 2: Record daily precipitation of 1.49",         Surpasses previous record of 1.42" set in 1986 JULY 3: Record daily precipitation of 1.98",         Surpasses previous record of 1.36" set in 1985 JULY 7: Record peak gust of 63 MPH,         Surpasses previous record of 55 MPH set in 1989 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   77/58/68/-5/T/.../..             23 SSW AERO 24 SSW RMY N/A 08/02   78/61/70/-3/T/.../..             28 WNW AERO 28 WNW RMY N/A 08/03   76/60/68/-5/0.00/.../..          15 N   AERO 16 N   RMY N/A 08/04   75/61/68/-5/0.71/.../..          21 ESE AERO 21 ESE RMY N/A 08/05   68/61/65/-8/1.68/.../..          28 NE  AERO 28 NE  RMY N/A 08/06   85/62/74/+1/0.00/.../..          19 S   AERO 20 WSW RMY N/A 08/07 The low since midnight is 66F, the daily normal low is 64F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR AUGUST 7 HIGH 95F IN 1924 LOW 51F IN 2004 PRECIP 3.32 INCHES IN 1926 PEAK GUST 51 MPH NE 1975 RECORDS FOR AUGUST 8 HIGH 93F IN 1909,1949 LOW 47F IN 1903 PRECIP 3.08 INCHES IN 1976 PEAK GUST 45 MPH WNW IN 1958 TODAY'S REPORT PREPARED BY: Matt Douglas