BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, SEPTEMBER 9, 2015  ALL TIMES ARE IN EASTERN STANDARD TIME **97F MAXIMUM TEMPERATURE TUESDAY SETS NEW  DAILY RECORD, SURPASSING 93F SET BACK IN 2007** THE NON-PROFIT BLUE HILL OBSERVATORY LAUNCHES  ONLINE KICKSTARTER FUNDRAISER FOR NEW  AEROVANE ANEMOMETER- PLEASE SUPPORT BY VISITING: https://www.kickstarter.com/projects/1451380431/fund-the-future-of-climate-science-at-blue-hill-ob Yesterday afternoon's 1:00 PM EST observation had already broken the old daily record of 93F, having reached 94F by that time. Just after 3:30 PM EST, temperature spike once  again to reach a maximum reading of 97F, now the second highest record maximum temperature on record in the month of September. Tuesday also marks the second 90F+ degree day in a row and the hottest day of the year by 5 degrees. BHO Highest September Daily Maximum Temperature, deg F (1885-2015) 1) 99 on 2 Sep 1953 2) 97 on 8 Sep 2015 3) 95 on 3 Sep 1929 4) 93 on 23 Sep 1895    93 on 1 Sep 1969    93 on 11 Sep 1983    93 on 8 Sep 2007    93 on 1 Sep 2010    93 on 2 Sep 2010    93 on 11 Sep 2013 The minimum temperature for yesterday of 70F breaks the record daily minimum temperature for 8 September, surpassing 69F set on that date 1999. Today's record of 91F may be in jeopardy as well, set back in 2002. If we hit the 90F degree mark today, this would mark only the second official September "heat wave" since 1895, when on the 21st, 22nd, and 23rd, temperatures hit a maximum of 91, 90 and 93F respectively.   By the 1:00 PM EST observation today, the previous record of 91F was unofficially broken, with a maximum temperature reading of 92F. Skies were mostly clear, with a few small cumulus in  thin cirrus in all directions. Visibility had improved somewhat to a hazy 40 miles in all directions. Today's Observations: 7 A.M. Weather: Thin scattered cirrus, few cumulus fractus distant E-SW Temperature: 74F; Dew Point: 69F; Wind: SSW at 9 kts, Sea-level pressure: 29.96 ins. Hg, steady, then rising  Visibility: 20 miles, except 15 miles E-SE,  obscured by light smoke layer in all directions, hazy 6-hr Max temp: 74F 6-hr Min temp: 70F 24-hr precip: 0.00 BHO SA 1155 250 -SCT 20 147/74/69/2109/996/ VSBY E-SE 15 MI FEW CUFRA DSNT E-SW THN FG ALQDS HAZY/ 8/701 53006 10074 20070 10 A.M. Weather: Thin broken cirrus, few small cumulus in all directions Temperature: 85F; Dew Point 67F; Wind: SW at 12G20 kts,  Sea-level pressure: 29.94 ins. Hg, rising, then falling and lower   Visibility: 25 miles, hazy    BHO SA 1455 E250 -BKN 25 139/85/67/2212G20/994/ FEW SML CU ALQDS HAZY/ 8/101 58008 1 P.M. Weather: Clear, few small cumulus in all directions, few thin cirrus fibratus in all directions Temperature: 90F; Dew Point: 69F; Wind: SSW at 13G22 kts Sea-level pressure: 29.87 ins. Hg, falling, then more slowly  Visibility: 40 miles, hazy 6-hr Max: 92F 6-hr Min: 74F BHO SA 155 CLR 40 115/90/69/2013G22/987/ FEW SML CU AND THN CI ALQDS HAZY/ 8/101 56024 10092 20074   SUMMARY FOR TUESDAY, SEPTEMBER 8, 2015     TEMPERATURE (DEGREES F) MAX.....97   NORMAL.....74  MIN.....70   NORMAL.....57  MEAN....84   NORMAL.....66    DEPARTURE FROM 30-YEAR NORMAL.......................+18 TOTAL DEPARTURE FOR THE MONTH.......................+55  [+6.7 DEGREES/DAY]   COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............19   DEPARTURE.........+16 TOTAL COOLING UNITS FOR THE MONTH..............71   DEPARTURE.........+44 TOTAL COOLING UNITS FOR THE SEASON............737   DEPARTURE........+173 TOTAL COOLING UNITS LAST SEASON TO DATE.......561   DIFFERENCE.......+176   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................22 WSW AT  2:02 P.M.                      ASOS........................23  SW AT  2:43 P.M.                      DAVIS.......................21 WSW AT  2:01 P.M. RMY 24 FASTEST MILE FOR YESTERDAY.....................15  SW AT 12:14 A.M.  MAXIMUM 2-MINUTE ASOS AVERAGE..................16  SW AT 12:14 A.M.   MAXIMUM 2-MINUTE DAVIS AVERAGE.................14  SW AT  N/A   AVERAGE WIND SPEED AND DIRECTION..............9.5 WSW                       ASOS.......................9.8                     DAVIS......................8.6 WSW [252 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..........Trace  DEPARTURE.....-0.96                          ASOS...............0.00 TOTAL PRECIPITATION FOR THE YEAR...........30.26  DEPARTURE.....-5.72                          ASOS................N/A *** *** ASOS annual total not available due to erroneous readings PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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 9/1  81/65/73/+5/0.00/.../..               20 SSW RMY 20 9/2  89/64/77/+9/0.00/.../..               20 SW  RMY 21   9/3  85/66/76/+9/T/.../..                  17 E   RMY N/A TSTM  9/4  72/58/65/0/0.00/.../..                31 ENE RMY N/A 9/5  77/55/66/-1/0.00/.../..               14 SW  RMY 18 9/6  87/57/72/+5/0.00/.../..               21 SSW RMY 22 9/7  92/63/78/+12/0.00/.../..              23 WSW RMY 24 9/8  97/70/84/+18/0.00/.../..              22 WSW RMY 24 9/9  low since midnight is 70F; normal low is now 57F   DAILY RECORDS FOR SEPTEMBER 2015 **9/7 DAILY RECORD MAXIMUM TEMPERATURE OF 92F  TIES PREVIOUS RECORD SET IN 2007** **9/8 DAILY RECORD MAXIMUM TEMPERATURE OF 97F  BREAKS PREVIOUS RECORD of 93F SET IN 2007** **9/8 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 70F  BREAKS PREVIOUS RECORD of 69F SET IN 1999** DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):  RECORDS FOR SEPTEMBER 9 HIGH 91F IN 2002 LOW 41F IN 1938 PRECIP 1.97 INCHES IN 1969 PEAK GUST 52 MPH WNW IN 1969, NW IN 1978 RECORDS FOR SEPTEMBER 10 HIGH 90F IN 1931,1989 LOW 41F IN 1956 PRECIP 5.60 INCHES IN 1999 (DAILY RECORD FOR SEPTEMBER) PEAK GUST 48 MPH NW IN 1972 TODAY'S REPORT PREPARED BY: Brian Fitzgerald