BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JULY 4, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME A HOT AND DRY INDEPENDENCE DAY WITH LIMITED VISIBILITY AND LIGHT WINDS.... Visibility improved slightly since this morning, increasing from 20 miles to 40 miles at 1 P.M. Conditions today were dry, yet an increase in cloud cover was seen throughout the day. A very light sea breeze is in effect, with a max speed of 10 mph. The high so far today is 87F, which is 7 degrees above the average daily maximum of 80F. The low since midnight is 68F, 6 degrees above the daily normal minimum of 62F.   From all of us at Blue Hill, Happy 4th of July!   PRELIMINARY STATS FOR JUNE 2019 TEMPERATURE, Deg. F Avg. Max. 75.1 [+0.1] Avg. Min. 57.3 [+0.2] Mean      66.2 [+0.1] 24-hour corrected mean: 66.0 Max. for month: 88F on the 28th Min. for month: 45F on the 4th COOLING DEGREE DAYS Total cooling units:    81 [-24] Total for the season:   89 [-40] Total for last season: 159 HEATING DEGREE DAYS Total cooling units:     36  [-37] Total for the season:  6254 [-122] Total for last season: 5916 PRECIPITATION, Inches Total: 4.08 [-0.23] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed: 9.9 Avg. corrected wind speed: 10.5 Prevailing wind direction: S at 17% Peak gust and direction: 41 W on 3rd   SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes:   N/A Today's Observations: 7 A.M. Weather: Clear, few cirrus in all directions Temperature: 75F; Dew Point: 63F; Wind: NNE at 4 kts, Wind: Light and variable Sea-level pressure: 30.08 ins. Hg, rising steadily Visibility: 20 miles, smoke layer along the horizon 6-hr Max temp: 75F 6-hr Min temp: 63F 24-hr Precip: 0.00 ins. BHO SA 1155 CLR 20 185/75/63/0304/008/ FEW CI ALQDS K LYR ALG HRZN WND L/V/ 8/002 53020 10075 20068 10 A.M. Weather: Broken cirrus Temperature: 84F; Dew Point: 63F; Wind: ENE at 6 kts, Wind: Light Sea-level pressure: 30.10 ins. Hg, rising steadily Visibility: 20 miles, smoke layer along the horizon 3-hr Precip: 0.00 ins. BHO SA 1455 E250 BKN 20 194/84/63/0606/010/ K LYR ALG HRZN WND LGT/ 8/002 53009 1 P.M. Weather: Broken cirrus, few cumulus Temperature: 87F; Dew Point: 54F; Wind: E at 6 kts, Wind: Light Sea-level pressure: 30.11 ins. Hg, falling then rising Visibility: 40 miles, distant haze 6-hr Max temp: 87F 6-hr Min temp: 75F 6-hr Precip: 0.00 ins. BHO SA 1755 E250 BKN 40 196/87/54/0806/011/ DSNT HZ FEW CU ALQDS WND LGT/ 8/102 50002 10087 20075 SUMMARY FOR WEDNESDAY, JULY 3, 2019 TEMPERATURE (DEGREES F) MAX.....89   NORMAL.....80 MIN.....67   NORMAL.....62 MEAN....78   NORMAL.....71 DEPARTURE FROM 30-YEAR NORMAL......................+7   TOTAL DEPARTURE FOR THE MONTH.....................+12 [+3.8 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............13   DEPARTURE.........+7 TOTAL COOLING UNITS FOR THE MONTH..............28   DEPARTURE........+10 TOTAL COOLING UNITS FOR THE SEASON............116   DEPARTURE........-31 TOTAL COOLING UNITS LAST SEASON TO DATE.......208   DEPARTURE........-92 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................18 S   AT  8:42 P.M.                    AERO.........................18 SSW AT  9:04 P.M.                    ASOS.........................19 S   AT  8:43 P.M.                    DAVIS........................18 W   AT  1:47 P.M. RMY 18 FASTEST MILE FOR YESTERDAY......................12 SSW AT  9:04 P.M MAXIMUM 2-MINUTE ASOS AVERAGE...................14 SSW AT  9:04 P.M MAXIMUM 2-MINUTE DAVIS AVERAGE..................13 SSW AT  9:03 P.M AVERAGE WIND SPEED AND DIRECTION...............7.0 N                    ASOS........................7.9                    DAVIS.......................7.7 WNW [289 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.11                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.00  DEPARTURE......-0.33                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE YEAR..........29.87  DEPARTURE......+2.57                          ASOS.............29.77 PRELIMINARY CLIMATE SUMMARY FOR JUNE 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 06/01 71/54/63/+1/0.00/551/61               21 E   AERO 20 E   RMY 18 06/02 75/51/63/+1/..../417/46               23 S   AERO 21 S   RMY N/A 06/03 69/50/60/-2/..../753/83               41 W   AERO 39 W   RMY 43 06/04 70/45/58/-5/0.00/717/79               29 W   AERO 23 W   RMY N/A 06/05 81/57/69/+6/..../527/58               33 SSW AERO 33 SSW RMY N/A 06/06 75/64/70/+6/..../428/47               28 SSW AERO 28 SSW RMY N/A 06/07 80/59/70/+6/0.00/692/76               23 S   AERO 23 S   RMY 22 06/08 78/57/68/+4/0.00/885/97               23 ENE AERO 21 SW  RMY 21 06/09 78/55/67/+3/0.00/840/93               22 S   AERO 21 S   RMY 21 06/10 79/54/67/+2/..../712/78               26 SSE AERO 25 SSE RMY 33 06/11 73/58/66/+1/..../247/27               32 NW  AERO 30 NW  RMY 35 06/12 75/52/64/-1/..../869/95               25 SSW AERO 25 S   RMY 28 06/13 55/49/52/-13/..../000/00              36 NE  AERO 35 NE  RMY 35 06/14 72/50/61/-5/0.00/.../..               38 W   AERO 39 W   RMY 38 06/15 79/54/67/+1/0.00/.../..               38 SSW AERO 41 SSW RMY 40 06/16 70/62/66/0/..../.../..                32 SW  AERO 35 SW  RMY N/A 06/17 74/62/68/+1/..../.../..               12 SSE AERO 18 NW  RMY 17 06/18 71/62/67/0/..../.../..                17*S   AERO 17 S   RMY 16 06/19 74/61/68/+1/..../.../..               16 SSE AERO 20 SSE RMY 19 06/20 69/61/65/-3/..../.../..               26 S   AERO 26 S   RMY 29 06/21 68/58/63/-5/..../.../..               32 NW  AERO 28 NW  RMY 33 06/22 77/56/67/-1/..../.../..               33 NW  AERO 32 NW  RMY 35 06/23 82/59/71/+3/..../.../..               30 NW  AERO 25 WNW RMY 29 06/24 84/61/73/+4/..../.../..               22 NW  AERO 21 NW  RMY 22 06/25 73/61/67/-2/0.18/.../..               35 S   AERO 37 S   RMY 37 06/26 77/64/71/+2/0.00/.../..               12 ENE AERO 18 SE  RMY N/A 06/27 81/57/69/0/0.00/.../..                21 NE  AERO 18 NE  RMY N/A 06/28 88/64/76/+6/.../.../..                16 SW  AERO 18 SW  RMY N/A 06/29 80/66/73/+3/.../.../..                25 W   AERO 25 W   RMY 26 06/30 75/59/67/-3/.../.../..                31 N   AERO 30 N   RMY 35 *Estimated 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 83/58/71/+1/0.00/.../..               21 NNW AERO 21 NNW RMY N/A 07/02 82/65/74/+4/0.00/.../..               23 W   AERO 23 W   RMY 23 07/03 89/67/78/+7/0.00/.../..               18 S   AERO 18 S   RMY 18 07/04 Low temp since midnight is 68F; normal low is 62F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JULY 4 HIGH 98F IN 1911, 1919, 1949 LOW 48F IN 1914 PRECIP 2.48 IN 2014 PEAK GUST 50e MPH WNW IN 1949 RECORDS FOR JULY 5 HIGH 98F IN 1911 LOW 48F IN 1920, 1927 & 1979 PRECIP 1.45 INS IN 1922 PEAK GUST 44e N IN 1944 TODAY'S REPORT PREPARED BY: Benjamin Turner