BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTSELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MADAILY DISCUSSION AND CLIMATE SUMMARYTHURSDAY, JULY 17, 2014 ALL TIMES ARE IN EASTERN STANDARD TIMEHEAVY RAIN INCLUDING THUNDERSTORMS BROUGHT AN INCH OF RAINFALL YESTERDAY...TEMPERATURES HELD DOWN TO A HIGH OF 73F IN HEAVILY OVERCAST AND FOGGY CONDITIONS... CIRRUS CLOUDS SLOW TO MOVE EASTWARD IN THE WAKE OF COLD FRONTAL PASSAGE EARLY TODAY A final total of 0.97 inch was the rainfall total recorded for yesterday which brought the three day total to 1.55 ins. Much drier air is in place today with dew points falling into the 50's after being in the 70's for at least a coupleof days. Temperatures were also in the low 70's yesterday making for very high relative humidity all day and the result was oppressive conditions. High cirrus cloudiness is showing a very slow tendency to clear away, but early this afternoon the advancing edge of clear sky was still just to our west. Today's Observations:7 A.M.Weather: Scattered altostratus/altocumulus, overcast dense cirrus,altostratus, few altocumulus layer ENE-SSW receding, dense cirrus with thin spots in overcast overhead, break in overcast/line of clearing extending WSW-NW Temperature: 64F; Dew Point: 59F; Wind: NW at 9 kts Sea-level pressure: 29.94 ins. Hg, rising, then more slowly Visibility: 50 miles, except NE 25 miles, hazy, W-NW 70 miles,distant haze 6-hr max temp: 65F6-hr min temp: 62F24-hr precip: 0.97 inchBHO SA 1155 170 SCT E220 OVC 50 140/64/59/3209/994/ AS/FEW LWR AC LYR XTDNGENE-SSW RCDNG DNS CI ALQDS PTLY THN OVHD BINOVC/LINE OF CLRG XTDNG WSW-NW VSBY NE 25 HAZY W-NW 70 LGT DSNT HZ/ 8/072 51016 MANUAL 70097 ASOS 70096 10065 20062 10 A.M. Weather: Scattered dense cirrus, thin overcast cirrus, few cumulus/moderatecumulus forming near horizon distant WNW, few altocumulus and altocumuluslenticularis distant E-SE, break in overcast/line of clearing extending WSW-NNW Temperature: 72F; Dew Point: 59F; Wind: N at 3 kts,Wind: Light Sea-level pressure: 29.97 ins. Hg, rising slightly Visibility: 50 miles, NE 30 miles, hazy, W-NW 55 miles, distant hazeBHO SA 1455 220 SCT 250 -OVC 50 148/72/59/3503/997/ FEW CU/MDT CU FRMG DSNT WNW ALG HRZN FEW AC/ACSL DSNT E-SE BINOVC/LINE OF CLRG XTDNG WSW-NW VSBY W-NW 55 DSNT HZ NE 30 HAZY WND LGT/8/242 51008 1 P.M. Weather: Broken dense cirrus, broken cirrus, cumulus formingdistant SE-SW-NW and vicinity N-NE few moderate, few altocumuluslenticularis distant E-SE, dense cirrus all quadrants, line of clearing WSW-N Temperature: 76F; Dew Point: 55F; Wind: W at 4 kts,Wind: Light Sea-level pressure: 29.98 ins. Hg, rising then falling slightly Visibility: 55 miles, distant haze, NE 30 miles, hazy,NW 70 miles, distant haze 6-hr max temp: 77F6-hr min temp: 64F BHO SA 1755 E220 BKN 250 BKN 55 151/76/55/2804/998/ CU FRMG DSNT SE-SW-NW AND VC N-NNE FEW MDT FEW ACSL DSNT E-SE DNS CI ALQDS LINE OF CLRG WSW-N VSBY NE 30 HAZY NW 70 DSNT HZ WND LGT/ 8/242 50003 10077 20064 WEATHER SUMMARY FOR WEDNESDAY, JULY 16, 2014 TEMPERATURE (DEGREES F)MAX.....73 NORMAL.....81MIN.....65 NORMAL.....63MEAN....69 NORMAL.....72DEPARTURE FROM 30-YEAR NORMAL.........................-3TOTAL DEPARTURE FOR THE MONTH........................+39 [+2.2 DEGREES/DAY]COOLING DEGREE DAYS (SEASON JAN TO DEC)TOTAL COOLING UNITS FOR YESTERDAY.............,4 DEPARTURE..........-3TOTAL COOLING UNITS FOR THE MONTH............142 DEPARTURE.........+35TOTAL COOLING UNITS FOR THE SEASON...........251 DEPARTURE.........+15TOTAL COOLING UNITS LAST SEASON TO DATE......335 DIFFERENCE........-84PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................27 SSW AT 8:32 A.M. ASOS.......................32 SSW AT 8:32 A.M. DAVIS......................30 SSW AT 8:32 A.M. RMY 32 FASTEST MILE FOR YESTERDAY....................22 SSW AT 8:32 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................23 SSW AT 8:32 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................22 SSW AT 8:32 A.M. AVERAGE WIND SPEED AND DIRECTION.............10.7 S ASOS......................10.6 DAVIS......................9.8 SSW [200 deg].PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.97 DEPARTURE..........+0.84 ASOS..............0.96TOTAL PRECIPITATION FOR THE MONTH..........4.35 DEPARTURE..........+1.45 ASOS..............4.32 TOTAL PRECIPITATION FOR THE YEAR..........28.90 DEPARTURE..........-0.97 ASOS.............28.83 PRELIMINARY CLIMATE SUMMARY FOR JULY 2014 CALENDAR DAY DATADATA REPORTED:DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY GUSTRMY: R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day)....: Data not yet available, records not finalized7/1 85/66/76/+6/0.00/695/76 31 SSW RMY 367/2 89/69/79/+9/T/639/70 33 SSW RMY 38 7/3 91/68/80/+9/0.05/611/67 29 W RMY 30 TSTM7/4 72/61/67/-4/2.48/027/03 28 N RMY N/A TSTM7/5 77/55/66/-5/0.27/738/81 36 NW RMY N/A 7/6 83/61/72/+1/0.00/892/98 29 SW RMY 337/7 85/65/75/+4/T/563/62 33 SW RMY 38 TSTM [NO RAIN] 7/8 89/70/80/+8/0.00/763/84 31 SW RMY 38 7/9 86/70/78/+6/0.00/779/86 28 SSW RMY N/A 7/10 80/65/73/+1/0.00/.../.. 16 NW RMY N/A7/11 76/62/69/-3/0.00/.../.. 22 NE RMY N/A 7/12 85/60/73/+1/0.00/.../.. 21 S RMY 25 7/13 82/64/73/+1/..../.../.. 31 S RMY 357/14 83/69/76/+4/..../.../.. 25 S RMY 277/15 82/70/76/+4/..../.../.. 26 S RMY 29 TSTM7/16 73/65/69/-3/0.97/000/00 27 SSW RMY 32 TSTM7/17 morning low of 62F; the normal low is now 63F DAILY RECORDS FOR JULY 20147/4- NEW DAILY RECORD RAINFALL OF 2.48 ins;surpasses previous record of 1.78 ins. in 1950DAILY EXTREMES Temperature and precipitation records back to 1885, andwind records back to 1940 (e = estimated): RECORDS FOR JULY 17HIGH 96F IN 1999LOW 47F IN 1892PRECIP 1.39 INS IN 1989WIND 46 MPH WNW IN 1971RECORDS FOR JULY 18HIGH 96F IN 1991, 1999LOW 54F IN 1892, 1956, 1971PRECIP 1.65 INS IN 2000WIND 43e MPH SW IN 1949TODAY'S REPORT PREPARED BY: Robert Skilling