BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, AUGUST 13, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME CLOUDY DAY WITH LATE MORNING DRIZZLE AND HAZE... Visibility has been teetering between 30 and 40 miles all day with hazy conditions and an abundance of clouds. 0.02" of rain was measured at 1 PM after light drizzle fell through the late morning into the early afternoon. Last night temperatures got as low as 70F, which is fairly high compared to our normal low temperature for today of 62F. Our high so far today, however, was 77F, which is 3 degrees below our normal maximum temperature for today of 80F. PRELIMINARY STATS FOR JULY 2019 TEMPERATURE, Deg. F Avg. Max. 84.6 [+3.8] Avg. Min. 65.6 [+2.7] Mean      75.1 [+3.2] 24-hour corrected mean: 74.5 Max. for month: 93F on the 20th, 30th Min. for month: 58F on the 1st, 23rd COOLING DEGREE DAYS Total cooling units:   322 [+100] Total for the season:  411 [+60] Total for last season: 455 PRECIPITATION, Inches Total: 5.45 [+1.43] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed: 8.8 Avg. corrected wind speed:   9.6 Prevailing wind direction: W at 14% Peak gust and direction: 44 W on 17th   SUNSHINE: Campbell-Stokes card minutes: 18300 minutes of possible 26682 or 69% Astronomical total minutes: 19049 minutes of possible 27759 or 69% Today's Observations: 7 A.M. Weather: Broken altocumulus Temperature: 73F; Dew Point: 66F; Wind: SSW at 7G16 kts Sea-level pressure: 29.82 ins. Hg, rising then steady Visibility: 40 miles, hazy 6-hr Max temp: 73F 6-hr Min temp: 70F 24-hr Precip: 0.00 ins. BHO SA 1155 E110 BKN 40 097/73/66/2107G16/982/ HAZY/ 8/070 51001 10073 20070 10 A.M. Weather: Overcast altostratus Temperature: 74F; Dew Point: 68F; Wind: SW at 10 kts Sea-level pressure: 29.81 ins. Hg, falling then steady Visibility: 30 miles, hazy 3-hr Precip: 0.00 ins. BHO SA 1455 E110 OVC 30 095/74/68/2310/981/ HAZY/ 8/020 56002 1 P.M. Weather: Light drizzle, overcast stratocumulus Temperature: 73F; Dew Point: 68F; Wind: SSW at 11G18 kts Sea-level pressure: 29.80 ins. Hg, steady then falling Visibility: 30 miles, hazy 6-hr Max temp: 77F 6-hr Min temp: 73F 6-hr Precip: 0.02 ins. BHO SA 1755 E20 OVC 30L- 092/73/68/2111G18/980/ L-CTD HAZY/ 8/400 58003 6002/ 10077 20073 SUMMARY FOR MONDAY, AUGUST 12, 2019 TEMPERATURE (DEGREES F) MAX.....82   NORMAL.....80 MIN.....60   NORMAL.....62 MEAN....71   NORMAL.....71 DEPARTURE FROM 30-YEAR NORMAL.......................0 TOTAL DEPARTURE FOR THE MONTH......................+7 [+0.4 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............6   DEPARTURE..........0 TOTAL COOLING UNITS FOR THE MONTH..............88   DEPARTURE.........+4 TOTAL COOLING UNITS FOR THE SEASON............499   DEPARTURE........+64 TOTAL COOLING UNITS LAST SEASON TO DATE.......604   DEPARTURE.......-105 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................25 W   AT 10:16 P.M.                    AERO.........................23 W   AT 10:16 P.M.                    ASOS.........................26 SSW AT 10:17 P.M.                    DAVIS........................24 SW  AT 10:17 P.M. RMY 28 FASTEST MILE FOR YESTERDAY......................19 W   AT 10:17 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................17 SW  AT  9:16 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................18 W   AT  4:11 P.M. AVERAGE WIND SPEED AND DIRECTION..............11.5 W                    ASOS.......................11.2                    DAVIS......................11.8 WSW [250 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.12                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.78  DEPARTURE......-0.95                          ASOS..............0.81 TOTAL PRECIPITATION FOR THE YEAR..........36.10  DEPARTURE......+3.38                          ASOS.............36.09 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/+1/0.00/896/98               21 NNW AERO 21 NNW RMY N/A 07/02 82/65/74/+4/0.00/329/36               23 W   AERO 23 W   RMY 23 07/03 89/67/78/+7/0.00/866/95               18 S   AERO 18 S   RMY 18 07/04 88/68/78/+7/0.00/748/82               17 SSW AERO M  M   RMY 17 07/05 87/69/78/+7/0.00/829/91               21 SW  AERO M  M   RMY 21 07/06 90/71/81/+10/0.83/646/71              26 WNW AERO M  M   RMY N/A TSTM 07/07 78/64/71/0/0.00/827/91                30 NE  AERO M  M   RMY N/A 07/08 79/59/69/-3/0.00/763/84               16 N   AERO 18 SSW RMY N/A 07/09 85/61/73/+1/0.00/871/96               18 NW  AERO 16 NW  RMY 18 07/10 88/69/79/+7/0.00/607/67               20 ESE AERO 16 ESE RMY 17 07/11 81/67/74/+2/0.62/000/00               35 S   AERO 33 S   RMY 36 07/12 84/68/76/+4/0.00/316/35               31 WNW AERO 30 WNW RMY 32 07/13 85/65/75/+3/0.00/812/90               21 W   AERO 20 WSW RMY 20 07/14 87/68/78/+6/0.00/702/78               25 W   AERO 21 W   RMY 23 07/15 82/63/73/+1/0.00/791/88               24 WNW AERO 23 WNW RMY 22 07/16 86/65/76/+4/0.00/682/76               23 W   AERO 21 W   RMY 21 07/17 90/70/80/+8/1.32/260/29               44 W   AERO M  M   RMY 47 TSTM 07/18 72/61/67/-5/0.04/000/00               33 NE  AERO 36 NE  RMY 33 07/19 89/61/75/+3/0.00/580/65               24 WSW AERO 26 SW  RMY 25 07/20 93/75/84/+12/0.00/802/90              21 WSW AERO 22 WSW RMY N/A 07/21 92/76/84/+12/0.00/729/82              31 W   AERO 35 W   RMY 31 07/22 81/64/73/+1/1.22/284/32               35 ENE AERO 37 ENE RMY 34 07/23 66/58/62/-10/0.86/009/01              30 NNE AERO 33 NNE RMY 30 07/24 77/60/69/-3/0.01/575/65               14 NE  AERO 15 NE  RMY N/A 07/25 80/61/71/-1/0.00/732/83            17 SSE AERO 23 N   RMY 17 07/26 84/62/73/+1/0.00/730/83               22 SSE AERO 23 SSE RMY 20 07/27 83/64/74/+2/0.00/834/95               21 S   AERO 23 S   RMY 21 07/28 89/64/77/+5/0.00/710/81               25 WSW AERO 36 WSW RMY 26 07/29 89/71/80/+8/0.01/804/92               23 W   AERO 25 W   RMY 21 07/30 93/71/82/+10/0.00/767/88              24 S   AERO 24 S   RMY 23 07/31 90/68/79/+7/0.55/548/63               37 SW  AERO 35 SW  RMY 38 TSTM DAILY RECORDS FOR JULY 2019 7/20/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 75F, BREAKS PREVIOUS RECORD OF 73F SET IN 1977, 2015 7/21/19: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 76F, BREAKS PREVIOUS RECORD OF 75F SET IN 1991 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 8/01   84/66/75/+3/0.00/.../..              18 NNW AERO 20 NW  RMY 17 8/02   83/61/72/0/0.00/.../..                18 WSW AERO 18 WSW RMY 18 8/03   84/66/75/+3/0.00/.../..               25 SW  AERO 26 SW  RMY 25 8/04   83/66/75/+3/0.00/.../..               21 NE  AERO 23 SW  RMY 25 8/05   81/58/70/-2/0.00/.../..               20 S   AERO 18 S   RMY 19 8/06   79/63/71/-1/0.00/.../..               15 S   AERO 14 S   RMY 17 8/07   82/66/74/+2/..../.../..               32 SSW AERO 35 SSW RMY 35 8/08   84/67/76/+4/..../.../..               30 SW  AERO 24 WNW RMY 29 8/09   82/63/73/+1/..../.../..               28 NW  AERO 25 NW  RMY 26 8/10   78/59/69/-2/..../.../..              32 NW  AERO 28 NW  RMY 28 8/11   78/55/67/-4/0.00/.../..               28 W   AERO 25 W   RMY 28 8/12   82/60/71/0/0.00/.../..                25 W   AERO 23 W   RMY 26 8/13 Low temp since midnight is 70F; normal low is 62F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR AUGUST 13 HIGH 98F IN 1944, 2002 LOW 47F IN 1902, 1957 PRECIP 2.92 INCHES IN 1989 PEAK GUST 52 MPH SSE IN 1963 RECORDS FOR AUGUST 14 HIGH 99F IN 2002 LOW 46F IN 1964 PRECIP 3.06 INCHES IN 1919 PEAK GUST 61 MPH WNW IN 1963 TODAY'S REPORT PREPARED BY: Samantha Richard