BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, AUGUST 4, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0440E SUNSET:  1900E OVERCAST WITH LIMITED VISIBILITY AND SOME LOWER LEVEL CLOUDS POPPING UP IN THE AFTERNOON.... Today was overcast with an average visibility around 40 miles. Dew points stayed in the lower 60's, and temperatures stayed in the lower 70's. Wind shifted from east to south, and increased to an average of 10 mph after a pretty light start this morning. With all the talk about how wet July was, the monthly total ended up being 11.59", which was only 0.09" away from breaking the all-time wettest July on record. Instead we have to settle with July 2021 coming in at 2nd place on the rankings. BHO Wettest Julys, inches (1885-2021) 1) 11.67 in 1938 2) 11.59 in 2021 3) 10.68 in 1988 4) 10.43 in 1921 5) 9.52 in 1915 6) 8.47 in 1889 7) 7.62 in 2009 8) 7.55 in 1916 The high so far today is 75F, 7 degrees below the daily normal maximum of 82F. The low so far today is 62F, which is 2 degrees below 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 [-4.0] 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: N/A Astronomical total minutes: N/A ----------------------------------------------- Today's Observations: 7 A.M. Weather: Broken altostratus, overcast cirrostratus Temperature: 68F; Dew Point: 58F; Relative Humidity: 70% Wind: E @ 3 kts, wind light Sea-level pressure: 30.15 in. Hg; rising then more rapidly Visibility: 40 miles 6-hr Max temp: 68F 6-hr Min temp: 62F 24-hr Precip: 0.00 ins. BHO SA 1155 180 BKN 250 OVC 40 210/68/58/0903/015/ SUN DMLY VSBL WND L/V/ 8/018 52014 10068 20062 10 A.M. Weather: Overcast cirrostratus Temperature: 72F; Dew Point: 60F; Relative Humidity: 65% Wind: SSE @ 3 kts, wind light and variable Sea-level pressure: 30.19 in Hg; rising steadily Visibility: 35 miles, hazy 3-hr Precip: 0.00 ins. BHO SA 1455 230 OVC 35 223/72/60/1503/019/ HAZY WND L/V/ 8/008 53013 1 P.M. Weather: Scattered altostratus, overcast cirrostratus, few cumulus Temperature: 73F, Dew point: 60F; Relative Humidity: 65% Wind: S @ 9G15 kts Sea-level pressure: 30.19 in Hg; rising then falling Visibility: 45 miles 6-hr Max temp: 75F 6-hr Min temp: 68F 6-hr Precip: 0.00 ins. BHO SA 1755 140 SCT 250 OVC 45 223/73/60/1809G15/019/ FEW CU ALQDS/ 8/118 55000 10075 20068 SUMMARY FOR TUESDAY, AUGUST 3, 2021 TEMPERATURE (DEGREES F) MAX.......76     NORMAL.....82 MIN.......60     NORMAL.....64 MEAN......68     NORMAL.....73 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL...........-5 TOTAL DEPARTURE FOR THE MONTH......................-13 [-4.5 DEGREES/DAY] HEATING DEGREE DAYS (SEASON: JUL 2021 THRU JUN 2022) TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE........-1 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................3  DEPARTURE........-5 TOTAL COOLING UNITS FOR THE MONTH...............11  DEPARTURE.......-11 TOTAL COOLING UNITS FOR THE SEASON.............390  DEPARTURE.......-21 TOTAL COOLING UNITS LAST SEASON TO DATE........529  DEPARTURE......-139 PEAK WIND GUST (MPH):                      Official...................15 N   @  1:34 A.M.                      AEROVANE (south tower).....16 N   @  2:26 A.M.                      VECTOR #2 (south tower)....16     @  1:34 A.M.                      DAVIS #2 (south tower).....16 S   @  9:14 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..................12 N   @  2:54 A.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............13     @  2:46 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............12 NNE @  2:50 A.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...... 6.2 S   [208 total miles]                      VECTOR #2................ 7.2                      DAVIS #2................. 6.9 SSW                      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....-0.13 TOTAL PRECIPITATION FOR THE MONTH............TRACE  DEPARTURE....-0.39 TOTAL PRECIPITATION FOR THE YEAR.............34.97  DEPARTURE....+4.14 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/.../..           55 NW  AERO 58 NW   RMY N/A TSTM 07/28   72/61/67/-6/0.06/.../..           18 NNE AERO 18 NNE  RMY N/A 07/29   77/61/69/-4/0.19/.../...          39 S   AERO 40 S    RMY N/A 07/30   78/58/68/-5/0.01/.../..           31 NW  AERO 31 NW   RMY N/A 07/31   74/52/63/-10/0.00/.../..          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/..../.../..          15 N   AERO 16 N    RMY N/A 08/04 The low since midnight is 62F, 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 4 HIGH 95F IN 1928 LOW 48F IN 1900 PRECIP 1.68 INS IN 1983 PEAK GUST 67 MPH SSE IN 2020 [POST-TROPICAL STORM ISAIAS] RECORDS FOR AUGUST 5 HIGH 98F IN 1955 LOW 48F IN 1929,1972 PRECIP 2.97 INCHES IN 1893 PEAK GUST 60e MPH SW 1977 TODAY'S REPORT PREPARED BY: Matt Douglas