BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, JUNE 10, 2015 ALL TIMES ARE IN EASTERN STANDARD TIME SUNSHINE AND WARM BUT MUCH DRIER TODAY FIRST 80 DEG. OF JUNE BRIEF RAIN SHOWER LEAVES ONLY 0.03 RAIN YESTERDAY Sunshine with warm and dry weather today as temps. reach 80 degrees for first time during June. The air has become very dry. The comparison of yesterday is 60-deg. dew points yesterday down to dew points in the upper 40's this afternoon. Only a few cumulus clouds dot the sky and winds are gradually backing from WNW to WSW-SW with a peak gust of only 22 MPH as reported on the RMY by early this afternoon. Visibility is limited to 55 miles by distant haze. A very brief rain shower early last evening left only 0.03 inch in a matter of a few minutes. Today's Observations: 7 A.M. Weather: Clear, patch dense cirrus WNW-NW, cirrostratus layer distant extending E-S Temperature: 64F; Dew Point: 57F; Wind: WNW at 8 kts Sea-level pressure: 29.85 ins. Hg, rising then more slowly Visibility: 35 miles, except 45 miles WNW, distant haze 6-hr Max temp: 64F 6-hr Min temp: 57F 24-hr precip: 0.03 in BHO SA 1155 CLR 35 107/64/57/2908/985/ PTCH DNS CI WNW-NW CS LYR XTDNG DSNT E-S VSBY WNW 45 DSNT HZ ALQDS/ 8/002 51020 MANUAL 70003 ASOS 70003 10064 20057 10 A.M. Weather: Clear, cumulus forming distant WNW-NNW, few cirrus N-NE Temperature: 75F; Dew Point: 52F; Wind: WNW at 5 kts, Wind: light Sea-level pressure: 29.86 ins. Hg, rising then more slowly Visibility: 55 miles, except 35 miles NE, distant haze BHO SA 1455 CLR 55 111/75/52/3005/986/ CU FRMG DSNT WNW-NNW FEW CI N-NE VSBY NE 35 DSNT HZ WND LGT/ 8/101 51004 1 P.M. Weather: Clear, few cumulus fractus and small cumulus in all parts of the sky Temperature: 79F; Dew Point: 48F; Wind: WSW at 8 kts, Wind: Direction variable SW to W Sea-level pressure 29.85 ins. Hg, falling slightly Visibility: 55 miles 6-hr Max temp: 81F 6-hr Min temp: 64F BHO SA 1755 CLR 55 108/79/48/2508/985/ CUFRA/SML CU ALQDS LGT DSNT HZ WND 22V28/ 8/100 58003 10081 20064 SUMMARY FOR TUESDAY, JUNE 9, 2015 TEMPERATURE (DEGREES F) MAX.....76 NORMAL.....73 MIN.....61 NORMAL.....55 MEAN....69 NORMAL.....64 DEPARTURE FROM 30-YEAR NORMAL........................+5 TOTAL DEPARTURE FOR THE MONTH.......................-56 [-6.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............0 DEPARTURE...........-3 TOTAL HEATING UNITS FOR THE MONTH..............78 DEPARTURE..........+41 TOTAL HEATING UNITS FOR THE SEASON...........6482 DEPARTURE.........+142 TOTAL HEATING UNITS LAST SEASON TO DATE......6414 DIFFERENCE.........+68 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............4 DEPARTURE..........+1 TOTAL COOLING UNITS FOR THE MONTH..............4 DEPARTURE.........-15 TOTAL COOLING UNITS FOR THE SEASON............53 DEPARTURE.........+10 TOTAL COOLING UNITS LAST SEASON TO DATE.......36 DIFFERENCE........+17 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................29 SSW AT 3:26 P.M. ASOS.......................31 SSW AT 3:26 P.M. DAVIS......................30 SSW AT 3:25 P.M. RMY 32 FASTEST MILE FOR YESTERDAY....................25 S AT 3:37 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................25 S AT 3:27 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................23 S AT 1:01 A.M. AVERAGE WIND SPEED AND DIRECTION.............. ASOS.......................16.3 DAVIS......................14.7 SSW [194 deg.] * Last of several occurrences... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.03 DEPARTURE....-0.13 ASOS...............0.03 TOTAL PRECIPITATION FOR THE MONTH...........1.58 DEPARTURE....+0.09 ASOS...............1.60 TOTAL PRECIPITATION FOR THE YEAR.......... 20.95 DEPARTURE....-3.07 ASOS...............N/A *** *** ASOS annual totals not available due to erroneous readings PRELIMINARY CLIMATE SUMMARY FOR JUNE 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 6/1 48/46/47/-15/0.69/000/00 32 NE RMY 34 6/2 47/44/46/-16/..../000/00 28 NNE RMY 28 6/3 59/44/52/-10/0.00/.../.. 16 ESE RMY 16 6/4 63/46/55/-8/0.00/.../.. 17 E RMY 16 6/5 70/49/60/-3/T/.../.. 17 NNE RMY 17 6/6 65/52/59/-4/0.06/.../.. 26 ENE RMY 27 6/7 73/49/61/-3/0.00/.../.. 28 S RMY 29 6/8 73/50/62/-2/T/.../.. 41 SSW RMY 48 6/9 76/61/69/+4/0.03/.../.. 29 SSW RMY 32 6/10 low since midnight is 57F; normal low is now 56F DAILY RECORDS FOR JUNE 2015 6/1- NEW RECORD LOW MAXIMUM TEMPERATURE OF 48F surpasses previous record of 51F in 2004 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 10 HIGH 98F IN 2008 LOW 42F IN 1913,1920 PRECIP 2.51 INCHES IN 1931 PEAK GUST 60e MPH NW IN 1941 RECORDS FOR JUNE 12 HIGH 92F IN 1973 LOW 40F IN 1906 PRECIP 1.79 INS 1955 PEAK GUST 58 MPH NW IN 1991 TODAY'S REPORT PREPARED BY: Robert Skilling