BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, OCTOBER 4, 2017   ALL TIMES ARE IN EASTERN STANDARD TIME TEMPS REACH 73F BY 1:00PM EST WITH WIND GUSTS OVER 20 MPH With high pressure to the south, winds remain out of the southwest and are bringing warm air into the region.  Temperatures rose to 73F by the 1:00PM observation which is 8F above normal.  Winds began to pick up in the early morning and were gusting over 20 MPH through the day.  Skies continue to be mostly sunny with few to scattered  cirrus, and visibility remains excellent at 70 miles. PRELIMINARY STATS FOR SEPTEMBER 2017   TEMPERATURE, Deg. F Avg. Max. 74.5 [+2.9] Avg. Min. 57.3 [+2.7] Mean      65.9 [+2.8] 24-hour corrected mean: 65.1 Max. for month: 86F on 25th and 27th Min. for month: 44F on 30th   HEATING DEGREE DAYS Total heating units: 67 [-50] Total for the season: 93 [-49] Total for last season: 75 COOLING DEGREE DAYS Total cooling units: 100 [+40] Total for the season: 707 [+110] Total for last season: 894 PRECIPITATION, Inches Total: 5.50 [+1.44] Greatest in 24 hrs: 2.33 on the 30th WIND, mph Avg. uncorrected wind speed: 10.2 Avg. corrected wind speed: 10.8 Prevailing wind direction: NNE at 13% Peak gust and direction: 47 NNE on 21st   SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes: N/A Today's Observations: 7 A.M. Weather: Scattered cirrus Temperature: 52F; Dew Point: 48F; Wind: SW at 11 kts Sea-level pressure: 30.40 ins. Hg, falling, then more quickly Visibility: 70 miles, distant fog in all directions 6-hr Max temp: 52F 6-hr Min temp: 50F 24-hr precip: 0.00 in. BHO SA 1155 250 SCT 70 295/52/48/2311/040/ DSNT FG ALQDS/ 8/001 58011 10052 20050 10 A.M. Weather: Scattered cirrus Temperature: 64F; Dew Point: 51F; Wind: SW at 12 kts Sea-level pressure: 30.36 ins. Hg, falling, then more quickly Visibility: 70 miles BHO SA 1455 250 SCT 70 280/64/51/2312/036/ 8/001 58015 1 P.M.  Weather: Few cirrus in all directions Temperature: 72F; Dew Point: 51F; Wind: SW at 12G20 kts Sea-level pressure: 30.26 ins. Hg, falling, then more quickly Visibility: 70 miles 6-hr Max temp: 73F  6-hr Min temp: 52F BHO SA 1755 CLR 70 248/72/51/2312G20/026/ FEW CI ALQDS/ 8/001 58032 10073 20052 SUMMARY FOR TUESDAY, OCTOBER 3, 2017   TEMPERATURE (DEGREES F) MAX.....67   NORMAL.....65 MIN.....50   NORMAL.....48 MEAN....59   NORMAL.....56 DEPARTURE FROM 30-YEAR NORMAL.........................+3 TOTAL DEPARTURE FOR THE MONTH.........................-1 [-0.5 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE...........0 TOTAL COOLING UNITS FOR THE MONTH...............0   DEPARTURE..........-1 TOTAL COOLING UNITS FOR THE SEASON............707   DEPARTURE........+109 TOTAL COOLING UNITS LAST SEASON TO DATE.......894   DEPARTURE........-187 HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............6   DEPARTURE..........-3 TOTAL HEATING UNITS FOR THE MONTH..............26   DEPARTURE...........0 TOTAL HEATING UNITS FOR THE SEASON............119   DEPARTURE.........-50 TOTAL HEATING UNITS LAST SEASON TO DATE.......100   DEPARTURE.........+19 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................21 S   AT  6:51 P.M.                    AERO........................21 S   AT  6:51 P.M.                    ASOS........................22 S   AT  6:51 P.M.                    DAVIS.......................21 S   AT  6:50 P.M. RMY N/A FASTEST MILE FOR YESTERDAY.....................16 S   AT  7:02 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................16 SW  AT 11:59 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................15 SSW AT  9:46 P.M. AVERAGE WIND SPEED AND DIRECTION..............8.5 S                    ASOS.......................9.0                    DAVIS......................6.4 S [180 DEG.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.14                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.00  DEPARTURE......-0.45                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE YEAR..........41.86  DEPARTURE......+2.33                          ASOS...............N/A *** *** ASOS annual total not available due to erroneous readings PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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 9/1  68/47/58/-10/0.00/749/95              26 WNW AERO 28 WNW RMY 31 9/2  72/46/59/-9/0.00/542/69               18 NNW AERO 18 NNW RMY 21 9/3  63/52/58/-9/0.24/000/00               33 W   AERO 33 W   RMY 37 9/4  79/55/67/0/0.00/702/90                29 SSW AERO 28 SSW RMY N/A 9/5  84/62/73/+6/0.00/583/75               36 S   AERO 32 S   RMY 38 9/6  76/59/68/+1/0.49/070/09               28 S   AERO 28 S   RMY 30 TSTM 9/7  74/58/66/0/0.79/417/54                24*WSW AERO 23 WSW RMY 24  9/8  74/53/64/-2/0.00/577/75               21 WSW AERO 18 WSW RMY 22 9/9  68/51/60/-6/T/620/81                  18 ENE AERO 16 ENE RMY 18 9/10 71/51/61/-4/0.00/694/91               18 NW  AERO 16 NW  RMY N/A 9/11 78/50/64/-1/0.00/692/91               20 NNW AERO 17 NNW RMY 20 9/12 84/58/71/+6/0.00/690/91               22 WSW AERO 18 WSW RMY 23 9/13 84/59/72/+8/T/680/90                  18 WSW AERO 15 WSW RMY 20 TSTM 9/14 82/66/74/+10/0.00/233/31              23 SW  AERO 23 WSW RMY 25 TSTM 9/15 83/66/75/+11/0.05/300/40              18 WNW AERO 15 WNW RMY 18 9/16 78/65/72/+9/T/261/35                  14 E   AERO  9 E   RMY 12 9/17 79/61/70/+7/T/334/45                  15 SSE AERO 14 SSE RMY 15 9/18 67/62/65/+3/0.02/000/00               21 NE  AERO 18 NE  RMY N/A 9/19 63/61/62/0/0.13/000/00                28 NE* AERO 25 NNE RMY N/A 9/20 68/62/65/+3/0.67/000/00               41 NNE AERO 44 NNE RMY 45 9/21 69/60/65/+4/0.01/242/33               47 NNE AERO 44 NNE RMY 50 9/22 60/54/57/-4/0.56/000/00               40 NNE AERO 38 NNE RMY N/A 9/23 74/59/67/+7/0.21/421/58               29 NNE AERO 29 NNE RMY N/A 9/24 85/63/74/+14/0.00/688/95              16 N   AERO 14 N*  RMY N/A 9/25 86/66/76/+16/0.00/671/93              15 ESE*AERO 13 ESE RMY 14 9/26 84/66/75/+16/0.00/503/70              15 SW  AERO 12 SW* RMY 14 9/27 86/64/75/+16/0.00/551/77              21 S   AERO 20 S   RMY 22  9/28 75/52/64/+6/0.00/605/85               29 NNW AERO 30 NNW RMY 33 9/29 65/46/56/-2/0.00/.../..               21 NNW AERO 20 NNW RMY N/A 9/30 56/44/50/-8/2.33/000/00               28 NE  AERO 25 ENE RMY 27 TSTM DAILY RECORDS FOR SEPTEMBER 9/1/17: DAILY RECORD LOW MINIMUM TEMPERATURE OF 47F,         TIES PREVIOUS RECORD SET IN 1975 9/27/17: DAILY RECORD HIGH MAXIMUM TEMPERATURE OF 86F,           BREAKS PREVIOUS RECORD SET IN 1998 AND TIED IN 2014 PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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 10/1  65/42/54/-3/0.00/.../..               18 WNW AERO 16 NW  RMY N/A 10/2  65/46/56/-1/0.00/.../..               21 NNW AERO 21 NNW RMY 21 10/3  67/50/59/+3/0.00/.../..               21 S   AERO 21 S   RMY N/A 10/4 Low temp since midnight is 50F; normal low is now 47F DAILY RECORDS FOR OCTOBER None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):       RECORDS FOR OCTOBER 4 HIGH 84F IN 2007  LOW 28F IN 1888 PRECIP 1.87 INCHES IN 2011 PEAK GUST 59 MPH SSW IN 1990 RECORDS FOR OCTOBER 5 HIGH 86F IN 2007 LOW 29F IN 1965 PRECIP 3.17 INCHES IN 1962 PEAK GUST 64e MPH S IN 1979 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle