BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, JULY 21, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME LESS HUMIDITY, WITH BETTER VISIBILITY AND PARTIAL CLOUD COVER.... Today felt on the cooler side in comparison with days prior, with dew points staying in the low 60s. Wind was westerly at an average of 10 mph. Visibility reached almost 65 miles in the middle of the day, falling back to 60 miles by the 1 P.M. observation. Conditions were partly cloudy, consisting of mostly fair weather cumulus and a layer of patchy altocumulus above it. Skies have cleared out in the late afternoon hours.   The high so far today is 87 degrees. This is 6 degrees above the daily normal high of 81F. The low since midnight is 68F, which is 5 degrees above the daily normal low of 63F. Today's Observations: 7 A.M. Weather: Few cirrus Temperature: 74F; Dew Point: 63F; Relative Humidity: 69% Wind: WNW at 7 kts Sea-level pressure: 29.99 ins. Hg: rising steadily Visibility: 45 miles 6-hr Max temp: 74F 6-hr Min temp: 68F 24-hr Precip: Trace BHO SA 1155 CLR 45 156/74/63/3007/999/ FEW CI ALQDS/ 8/002 51015 10074 20068   10 A.M. Weather: Scattered cumulus, broken altocumulus Temperature: 83F; Dew Point: 65F; Relative Humidity: 55% Wind: WNW at 7 kts Sea-level pressure: 30.00 ins. Hg: rising, then falling Visibility: 60 miles 3-hr Precip: 0.00 ins. BHO SA 1455 50 SCT 170 BKN 60 160/83/65/2907/000/ 8/150 53004 1 P.M. Weather: Scattered cumulus and broken altocumulus Temperature: 83F; Dew Point: 65F; Relative Humidity: 55% Wind: W at 9G22 kts Sea-level pressure: 30.00 ins. Hg: falling, then more slowly Visibility: 60 miles 6-hr Max temp: 87F 6-hr Min temp: 74F 6-hr Precip: 0.00 ins. BHO SA 1755 50 SCT 170 BKN 60 159/83/65/2809G22/000/ 8/150 55001 10087 20074 SUMMARY FOR MONDAY, JULY 20, 2020 TEMPERATURE (DEGREES F) MAX.....92   NORMAL.....81 MIN.....72   NORMAL.....63 MEAN....82   NORMAL.....72 DEPARTURE FROM 30-YEAR NORMAL................. +10 TOTAL DEPARTURE FOR THE MONTH................. +29 [+1.3 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY.................17  DEPARTURE.......+10 TOTAL COOLING UNITS FOR THE MONTH................151  DEPARTURE.......+14 TOTAL COOLING UNITS FOR THE SEASON...............335  DEPARTURE.......+69 TOTAL COOLING UNITS LAST SEASON TO DATE..........299  DEPARTURE.......+36 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................25 SSW AT  5:17 A.M.                      AERO.........................25 SSW AT  5:17 A.M.                     ASOS.........................25 SW  AT  5:17 A.M.                    DAVIS........................25 SW  AT  5:16 A.M RMY N/A FASTEST MILE FOR YESTERDAY......................19 SSW AT  5:16 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................21 SSW AT  5:17 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................20 SSW AT  5:17 A.M. AVERAGE WIND SPEED AND DIRECTION..............12.1 SW                               ASOS.......................11.8                    DAVIS......................12.0 WSW [248 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace  DEPARTURE......-0.13                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.06  DEPARTURE......-1.40                          ASOS..............1.06 TOTAL PRECIPITATION FOR THE YEAR..........28.41  DEPARTURE......-1.02                          ASOS.............29.07 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  76/63/70/0/0.00/228/25              16 E    AERO 14 E    RMY 14  TSTM 07/02  86/61/74/4/0.00/803/88              30 WSW  AERO 25 WSW  RMY 33 07/03  73/60/67/-4/0.00/091/10             30 NE   AERO 28 NE   RMY 30 07/04  79/60/70/-1/0.00/565/62             16 S    AERO 16 S    RMY 16 07/05  83/63/73/+2/0.54/373/41             24 NW   AERO 30 NW   RMY 26  TSTM 07/06  73/60/67/-4/0.00/.../..             20 ENE  AERO 16 NNE  RMY 18 07/07  78/60/69/-2/0.00/.../..             25 S    AERO 25 S    RMY 26 07/08  83/64/74/+2/0.00/.../..             32 SSW  AERO 32 SSW  RMY 32 07/09  89/70/80/+8/0.00/.../.              24 S    AERO 23 S    RMY 22 07/10  83/70/77/+5/0.05/.../..             30 SSE  AERO 32 SSE  RMY N/A 07/11  85/70/78/+6/0.00/.../..             39 S    AERO 39 S    RMY 38 07/12  86/70/78/+6/0.00/.../..             28 WSW  AERO 28 WSW  RMY 29 07/13  82/69/76/+4/0.23/.../..             30 SSE  AERO 31 SSE  RMY 30  TSTM 07/14  78/63/71/-1/0.00/.../..             26 ENE  AERO 25 ENE  RMY 26   07/15  72/59/66/-6/0.00/.../..             21 NE   AERO 21 NE   RMY N/A 07/16  73/57/65/-7/0.00/.../..             21 E    AERO 21 E    RMY 19 07/17  71/57/64/-8/0.19/.../..             24 SSW  AERO 24 SSW  RMY 25 07/18  89/66/78/+6/0.00/.../..             18 W    AERO 17 W    RMY 19 07/19  92/69/81/+9/0.00/.../..             28 S    AERO 28 S    RMY 26 07/20  91/72/82/+10/T/.../..               25 SSW  AERO 25 SSW  RMY N/A 07/21 The low since midnight is 72F, the daily normal low is 63F 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 1900 PEAK GUST 55 MPH IN 1983 TODAY'S REPORT PREPARED BY: Benjamin Turner