BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, JULY 21, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0426E SUNSET:  1914E HAZY AND SMOKY, YET A LITTLE MORE COMFORTABLE.... Today we observed more smoke aloft with a limited visibility due to haze. We recorded 0.14 inches of rain from a passing thunderstorm early this morning. It's another humid day with dew points hanging out in the mid 60s all day. Conditions are less oppressive than yesterday with a consistent northwesterly breeze around 10 mph. We are still on the watch for breaking the record for wettest July on record. We are currently 1.01" away from tying the record from 1938. Here are the rankings for wettest Julys as compiled by our Chief Scientist, Mike Iacono... BHO Wettest Julys, inches (1885-2021) 1) 11.67 in 1938 2) 10.68 in 1988 3) 10.43 in 1921 4) 9.52 in 1915 5) 8.47 in 1889 6) 7.62 in 2009 7) 7.55 in 1916 The high so far today is 83F, 1 degree above the daily normal maximum of 82F. The low so far today is 64F, which is equal to the daily normal minimum of 64F. On a side note, the renovations have now begun in earnest. We are no longer operating out of the tower and have moved to another part of the building. All wind instruments on the main tower have been taken offline and will remain so until further notice. Please be patient with us as we navigate through our new routine. Data at times may be delayed. ----------------------------------------------- Today's Observations: 7 A.M. Weather: Scattered altocumulus, broken cirrus Temperature: 69F; Dew Point: 67F; Relative Humidity: 94% Wind: SSW @ 7 kts, wind light Sea-level pressure: 29.87 in. Hg; falling then rising Visibility: 5 miles, fog 6-hr Max temp: 69F 6-hr Min temp: 65F 24-hr Precip: 0.14 in. BHO SA 1155 100 SCT 250 BKN 5F 114/69/67/2207/987/ K LYR ALF/ 8/081 70014 51005 10069 20065 10 A.M. Weather: Scattered altocumulus, broken cirrus Temperature: 75F; Dew Point: 64F; Relative Humidity: 70% Wind: W @ 10G14 kts Sea-level pressure: 29.86 in Hg; rising unsteadily Visibility: 30 miles, hazy 3-hr Precip: 0.00 ins. BHO SA 1455 100 SCT 250 BKN 30 119/75/64/2710G14/986/ FEW CU ALQDS HAZY K LYR ALF/ 8/181 52005 1 P.M. Weather: Scattered cumulus, broken cirrus, smoke layer aloft Temperature: 77F, Dew point: 65F; Relative Humidity: 67% Wind: WNW @ 7 kts   Sea-level pressure: 29.86 in Hg; falling steadily Visibility: 20 miles, haze 6-hr Max temp: 79F 6-hr Min temp: 69F 6-hr Precip: 0.00 ins. BHO SA 1755 E30 BKN 250 -BKN 20 113/77/65/2907/986/ K LYR ALF HAZY/ 8/201 58006 10079 20069 SUMMARY FOR TUESDAY, JULY 20, 2021 TEMPERATURE (DEGREES F) MAX.......83     NORMAL.....82 MIN.......64     NORMAL.....64 MEAN......74     NORMAL.....73 DEPARTURE FROM 30-YEAR (1991-2020) NORMAL..........+1 TOTAL DEPARTURE FOR THE MONTH.....................-78 [-4.1 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...............26  DEPARTURE.......+21 TOTAL HEATING UNITS FOR THE SEASON..............26  DEPARTURE.......+21 TOTAL HEATING UNITS LAST SEASON TO DATE..........1  DEPARTURE.......+25 COOLING DEGREE DAYS (SEASON: JAN 2021 THRU DEC 2021) TOTAL COOLING UNITS FOR YESTERDAY................9  DEPARTURE.........0 TOTAL COOLING UNITS FOR THE MONTH...............98  DEPARTURE.......-58 TOTAL COOLING UNITS FOR THE SEASON.............324  DEPARTURE.......+29 TOTAL COOLING UNITS LAST SEASON TO DATE........332  DEPARTURE.......-11 PEAK WIND GUST (MPH):                      Official...................23 NW  @ 11:58 P.M.                      AEROVANE (south tower).....23 NW  @ 11:51 P.M.                      VECTOR #2 (south tower)....26     @ 11:59 P.M.                      DAVIS #2 (south tower).....21 NW  @ 11:56 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 NW  @ 11:59 P.M. MAXIMUM 2-MINUTE VECTOR #2 AVERAGE..............17     @ 11:59 P.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............17 NW  @ 12:00 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...... 7.3 W  [176 total miles]                      VECTOR #2................ 8.3                      DAVIS #2................. 8.2 W                      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.......0.14  DEPARTURE....+0.03 TOTAL PRECIPITATION FOR THE MONTH............10.66  DEPARTURE....+8.44 TOTAL PRECIPITATION FOR THE YEAR.............34.04  DEPARTURE....+4.85 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/.../..           19 S   AERO 18 S    RMY N/A 07/15   88/67/78/+5/0.00/.../..           19 WSW AERO 18 SSW  RMY N/A 07/16   90/70/80/+7/0.04/.../..           36 NNW AERO 39 NNW  RMY N/A TSTM 07/17   78/64/71/-2/0.34/.../..           26 ENE AERO 25 ENE  RMY N/A TSTM 07/18   74/63/69/-4/0.15/.../..           22 NE  AERO 22 NE   RMY N/A TSTM 07/19   71/63/67/-6/0.07/.../..           17 ENE AERO 17 ENE  RMY N/A 07/20   83/64/74/+1/..../.../..           23 NW  AERO 23 NW   RMY N/A 07/21   The low since midnight is 65F, the daily normal low is 64F 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 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated) RECORDS FOR JULY 21 HIGH 100F IN 1977 [RECORD FOR MONTH] LOW 48F IN 1890 PRECIP 2.09 INS IN 1938 PEAK GUST 60e MPH WNW IN 1977 RECORDS FOR JULY 22 HIGH 99F IN 1926, 2011 LOW 52F IN 1890 PRECIP 1.73 INS IN 1887 PEAK GUST 55 MPH IN 1983 TODAY'S REPORT PREPARED BY: Benjamin Turner