BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, JULY 1, 2016 ALL TIMES ARE IN EASTERN STANDARD TIME CLOUDY SKIES AND INCREASING WINDS APPROACHING COLD FRONT With the onset of another cold front, skies were mostly cloudy today with cirrostratus and cumulus/altocumulus. Yesterday's winds were extremely light, measuring an average of only 8.0 MPH from the NW with a peak gust of 17 MPH WSW. However, by 1:00PM EST, speeds increased to 15-20 MPH, and wind direction shifted to be out of the south. It was another warm day with temperatures reaching a max. of 84F by the 1:00PM EST observation but had started dropping shortly after with the approaching front. PRELIMINARY STATS FOR JUNE 2016 TEMPERATURE, Deg. F Avg. Max. 77.3 [+2.3] Avg. Min. 57.2 [+0.1] Mean 67.3 [+1.2] 24-hour corrected mean: 66.6 Max. for month: 86 on 26th and 30th Min. for month: 48 on 9th HEATING DEGREE DAYS Total heating units: 34 [-39] Total for the season: 5248 [-1055] Total for last season: 6404 COOLING DEGREE DAYS Total cooling units: 109 [+4] Total for the season: 157 [+28] Total for last season: 138 PRECIPITATION, Inches Total: 1.62 [-2.69] Greatest in 24 hrs: 0.76 in. on 5th WIND, mph Avg. uncorrected wind speed: 11.2 Avg. corrected wind speed: 11.6 Prevailing wind direction: S at 24% Peak gust and direction: 41 WNW on 8th, 41 W on 12th SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes: N/A Today's Observations: 7 A.M. Weather: Few altocumulus WNW-NE, scattered cirrus Temperature: 71F; Dew Point: 61F; Wind: estimated S at 5 kts, Wind Speed: Light Sea-level pressure: 30.03 in. Hg, rising, then falling Visibility: 30 miles, except 50 miles W-ENE, distant haze 6-hr Max temp: 71F 6-hr Min temp: 67F 24-hr precip: 0.00 in. BHO SA 1155 250 SCT 30 169/71/61/E1705/003/ FEW AC WNW-NE VSBY W-ENE 50 DSNT HZ WND LGT/ 8/061 50002 10071 20067 10 A.M. Weather: Few cumulus in all directions, scattered cirrocumulus, broken cirrostratus Temperature: 81F; Dew Point: 60F; Wind: S at 10 kts Sea-level pressure: 30.01 in. Hg, falling, then more quickly Visibility: 20 miles, distant haze BHO SA 1455 200 SCT E250 BKN 20 163/81/60/1810/001/ FEW CU ALQDS DSNT HZ/ 8/208 58006 1 P.M. Weather: Scattered altocumulus, broken cirrostratus Temperature: 83F; Dew Point: 61F; Wind: S at 17G24 kts Sea-level pressure: 29.98 in. Hg, falling, then more slowly Visibility: 40 miles, distant haze 6-hr Max temp: 85F 6-hr Min temp: 68F BHO SA 1755 89 SCT 250 BKN 40 154/83/61/1717G24/998/ DSNT HZ/ 8/058 56009 10084 20072 SUMMARY FOR THURSDAY, JUNE 30, 2016 TEMPERATURE (DEGREES F) MAX.....86 NORMAL.....79 MIN.....63 NORMAL.....61 MEAN....75 NORMAL.....70 DEPARTURE FROM 30-YEAR NORMAL.........................+5 TOTAL DEPARTURE FOR THE MONTH........................+41 [+1.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............0 DEPARTURE..........-1 TOTAL HEATING UNITS FOR THE MONTH..............34 DEPARTURE.........-39 TOTAL HEATING UNITS FOR THE SEASON...........5282 DEPARTURE.......-1094 TOTAL HEATING UNITS LAST SEASON TO DATE......6505 DIFFERENCE......-1223 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............10 DEPARTURE..........+4 TOTAL COOLING UNITS FOR THE MONTH.............109 DEPARTURE..........4 TOTAL COOLING UNITS FOR THE SEASON............157 DEPARTURE.........+28 TOTAL COOLING UNITS LAST SEASON TO DATE.......138 DIFFERENCE........+19 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................17 WSW AT 2:27 P.M. ASOS........................18 WSW AT 2:26 P.M. DAVIS.......................17 WSW AT 2:25 P.M. RMY 19 FASTEST MILE FOR YESTERDAY.....................12 SSW AT 10:26 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................13 SW AT 10:35 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................12 S AT 10:28 P.M. AVERAGE WIND SPEED AND DIRECTION...............8.0 NW ASOS........................8.4 DAVIS.......................7.0 W [270 Deg.] * Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE......-0.11 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.62 DEPARTURE......-0.11 ASOS..............1.68 TOTAL PRECIPITATION FOR THE YEAR..........21.69 DEPARTURE......-5.28 ASOS.............22.12 PRELIMINARY CLIMATE SUMMARY FOR JUNE 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 6/1 71/54/63/+1/0.00/860/95 26 NE AERO 30 NE RMY N/A 6/2 68/54/61/-1/0.00/444/49 21 NE AERO 22 NE RMY 21 6/3 70/57/64/+2/T/173/19 16 SSW AERO 17 SSW RMY 16 6/4 81/61/71/+8/0.00/491/54 18 S AERO 21 S RMY 20 6/5 67/60/64/+1/0.76/000/00 32 SSE AERO 36 SSE RMY 34 6/6 80/63/72/+9/0.00/747/82 26 W AERO 28 W RMY 27 6/7 83/58/71/+7/0.18/602/66 32 WNW AERO 36 WNW RMY 33 TSTM 6/8 72/52/62/-2/0.05/684/75 37 WNW AERO 41 WNW RMY 38 TSTM 6/9 67/48/58/-6/0.00/466/51 41 WNW AERO 45 WNW RMY 40 6/10 71/50/61/-4/0.00/823/90 25 W AERO 28 W RMY 26 6/11 68/52/60/-5/0.06/155/17 30 SSW AERO 35 SSW RMY 31 6/12 76/51/64/-1/T/558/61 41 W AERO 48 W RMY 42 6/13 70/49/60/-5/0.00/641/70 36 NW AERO 46 NW RMY 38 6/14 77/50/64/-2/0.00/889/97 32 NNW AERO 38 NNW RMY 33 6/15 83/60/72/+6/0.00/852/93 22 NW AERO 26 NW RMY 25 6/16 82/62/72/+6/0.00/660/72 26 E AERO 28 E RMY 27 6/17 77/59/68/+1/T/834/91 25 E AERO 28 E RMY 23 TSTM 6/18 75/55/65/-2/0.00/899/98 22 SSW AERO 24 SSE RMY N/A 6/19 79/55/67/+0/0.00/807/88 32 S AERO 35 S RMY 36 6/20 81/57/69/+1/0.00/871/95 25 S AERO 28 S RMY 27 6/21 82/61/72/+1/0.40/596/65 30 WSW AERO 31 W* RMY 33 6/22 79/59/69/+1/0.01/495/54 31 NW AERO 35 NW RMY 31 6/23 84/56/70/+2/0.00/642/70 17 S AERO 18 S RMY 18 . 6/24 77/58/68/-1/0.00/889/97 20 NE AERO 21 NE RMY 20 6/25 80/60/70/+1/0.00/889/97 16 ENE AERO 17 ENE RMY 16 6/26 86/59/73/+4/0.00/870/95 25 S AERO 26 S RMY 26 6/27 84/60/72/+3/T/641/70 32 S AERO 35 S* RMY 34 6/28 77/66/72/+2/0.15/.../.. 26 S AERO 29 S RMY 27 TSTM 6/29 85/66/76/+6/0.01/.../.. 28 WNW AERO 28 WNW RMY 29 6/30 86/63/75/+5/0.00/.../.. 17 WSW AERO 18 WSW*RMY 19 7/1 low temp since midnight is 67F; normal low now 61F DAILY RECORDS FOR JUNE 2016 None DAILY RECORDS FOR JULY 2016 None so far DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JULY 1 HIGH 98F IN 1964 LOW 44F IN 1988 [RECORD FOR MONTH] PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH] PEAK GUST 52 MPH WNW IN 1974 RECORDS FOR JULY 2 HIGH 95F IN 1963 LOW 47F IN 1988 PRECIP 1.42 INS IN 1986 PEAK GUST 45 MPH SW IN 1999 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle