BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, JULY 17, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME   HEAT WAVE GETS UNDERWAY TODAY AT 3 DAYS TEMPERATURE CLIMBS TO 92F BY 2 P.M. EDT  MORNING LOW TEMPERATURE OF 74F LIKELY EQUALS RECORD AND ALSO APPEARS TO BE WARMEST IN SOUTHERN NEW ENGLAND   The second heat wave of the month was established today with 3 days of 90 degrees or more.  Today maximum temperature had reached 92F early this afternoon but was well short of the record of 96F set in 1999.   The minimum temperature of 74F this morning would equal the record high minimum established way back in 1900. Our low of 74F this morning appears to be the warmest overnight low in all of southern New England with Boston's 73 degrees and Worcester's 72 a close second and third respectively.  The record highs of 96F over the next two days may be challenged. (see listing below)   Today's Observations:   7 A.M. Weather:  Clear, few altocumulus northwest and north-northeast through east Temperature: 79F; Dew Point: 70F; Wind: W at 2 kts, estimated Sea-level pressure: 30.20 ins. Hg, rising then more Visibility: 9 miles, hazy 6-hr min. temp: 74F BHO SA 1155 CLR 9 226/79/70/E2602/020/ FEW AC NW AND NNE-E HAZY WND LGT/ 8/030 51007 10079 20074   10 A.M. Weather: Clear, cumulus forming except overhead-E-S, moderate cumulus forming vicinity NNW-N, few cirrus SW-N  Temperature: 87F; Dew Point: 70F; Wind: Estimated S at 6 kts, Wind: Light  Sea-level pressure: 30.18 ins. Hg, falling slightly Visibility: 20 miles, except 15 miles NE-SE, 25 miles WNW, hazy BHO SA 1455 CLR 20 221/87/70/1806/018/ CU FRMG XCPT OVHD-E-S MDT CU VC NNW-N FEW CI SW-N VSBY NE-SE 15 WNW 25 HAZY ALQDS WND LGT/ 8/201 58005   1 P.M. Weather: Scattered cumulus, few moderate cumulus, scattered cirrus, cirrus distant SW Temperature: 89F; Dew Point: 68F; Wind: WNW at 8 kts, Wind: Direction variable SSW-W Sea-level pressure: 30.14 ins. Hg, falling Visibility: 25 miles, except 20 NE-SE, 30 W-NW, hazy 6-hr max. temp: 92F BHO SA 1755 40 SCT 250 SCT 25 208/89/68/2408/014/ FEW MDT CU ALQDS CI DSNT SW VSBY NE-SE 20 W-NW 30 HAZY 20V28/ 8/201 57013 10092 20079   WEATHER SUMMARY FOR TUESDAY, JULY 16, 2013   TEMPERATURE (DEGREES F) MAX.....91     NORMAL.....81 MIN.....71     NORMAL.....63 MEAN....81     NORMAL.....72   DEPARTURE FROM 30-YEAR NORMAL.....................+9 TOTAL DEPARTURE FOR THE MONTH....................+76 [+4.6 DEGREES/DAY]   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY................18 NNW AT 11:45 A.M.                    AERO.....................16 NNW AT 11:45 A.M.                    ASOS.....................18 NNW AT 11:45 A.M.                    DAVIS....................15 NNW AT  1:03 A.M. RMY N/A FASTEST MILE FOR YESTERDAY..................12 NNW AT 11:45 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...............14 NW  AT 11:45 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..............12 NW  AT 11:44 A.M. AVERAGE WIND SPEED AND DIRECTION...........7.9 NNW                    ASOS....................7.8                     DAVIS...................7.0 NNW [340 deg.]   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE............-0.13                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.01   DEPARTURE............-0.92                          ASOS..............1.00 TOTAL PRECIPITATION FOR THE YEAR..........33.21   DEPARTURE............+4.31                          ASOS..............N/A* *ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals        PRELIMINARY CLIMATE SUMMARY FOR JULY 2013 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized                               7/1  82/69/76/+6/0.05/247/27         29 S   AERO 31 MPH SSW RMY 32 7/2  82/61/72/+2/T/100/11            23 SSW AERO 23 MPH SSW RMY 25 7/3  87/62/75/+4/T/556/61            28 SW  AERO 30 MPH SW  RMY 30 7/4  90/71/81/+10/0.00/811/89        25 WSW AERO 26 MPH SW  RMY 28 7/5  92/73/83/+12/0.00/874/96        24 W   AERO 25 MPH WSW RMY 25 7/6  90/73/82/+11/0.00/836/92        25 WNW AERO 25 MPH WNW RMY 26 7/7  91/72/82/+11/0.21/508/56        38 SSW AERO 43 MPH SSW RMY 44  TSTM 7/8  82/64/73/+1/0.04/617/68         18 NE  AERO 20 MPH NE  RMY 20  TSTM 7/9  72/63/68/-4/0.01/054/06         14 ENE AERO 14 MPH ENE RMY 14 7/10 84/65/75/+3/T/335/37            32 S   AERO 36 MPH S   RMY 35 7/11 79/69/74/+2/0.62/.../..         23 W   AERO 23 MPH W   RMY N/A TSTM 7/12 70/62/66/-6/0.00/.../..         29 NE  AERO 29 MPH NE  RMY 30 7/13 75/62/69/-3/0.08/.../..         21 ENE AERO 20 MPH ENE RMY N/A 7/14 89/71/80/+8/0.00/.../..         16 W   AERO 16 MPH W   RMY 16 7/15 91/72/82/+10/0.00/.../..        17 NW  AERO 16 MPH NW  RMY 18 7/16 91/71/81/+9/0.00/.../..         18 NNW AERO 16 MPH NNW RMY 16   7/17 morning low temp: 74F; the normal low is now 63F   DAILY RECORDS FOR JULY 2013 None so far.   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR JULY 17 HIGH 96F IN 1999 LOW 47F IN 1892 PRECIP 1.39 INS IN 1989 WIND 46 MPH WNW IN 1971   RECORDS FOR JULY 18 HIGH 96F IN 1991, 1999 LOW 54F IN 1892, 1956, 1971 PRECIP 1.65 INS IN 2000 WIND 43e MPH SW IN 1949   RECORDS FOR JULY 19 HIGH 96F IN 1977, 1991 LOW 50F IN 1890 PRECIP 1.10 INS IN 1951 WIND 63 MPH SSW IN 1982   TODAY'S REPORT PREPARED BY: Robert Skilling/Marc Douglas