BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JUNE 8, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME SEASONABLE AND HAZY WITH WINDS DYING DOWN IN THE AFTERNOON.... We observed a distant haze that became more significant since this morning, bringing visibility from 50 miles to 30 miles by 1 P.M. Wind became lighter throughout the day, with an average speed of 5 mph following noontime. Relative humidity decreased from 60% this morning to 35%, following the drying trend observed yesterday. The high so far today is 74F, a degree above the normal of 73F. The low since midnight is 58F, 3 degrees above the daily normal minimum of 55F. PRELIMINARY STATS FOR MAY 2019 TEMPERATURE, Deg. F Avg. Max. 63.5 [-2.8] Avg. Min. 46.0 [-1.8] Mean 54.8 [-2.2] 24-hour corrected mean: 54.4 Max. for month: 85F on the 26th Min. for month: 36F on the 12th HEATING DEGREE DAYS Total heating units: 318 [+50] Total for the season: 6219 [-84] Total for last season: 5847 COOLING DEGREE DAYS Total cooling units: 8 [-14] Total for the season: 8 [-16] Total for last season: 62 PRECIPITATION, Inches Total: 4.71 [+0.08] Greatest in 24 hrs: N/A SNOWFALL, Inches Total: Trace [+/-0.0] Greatest in 24 hrs: Trace [12th] WIND, mph Avg. uncorrected wind speed: 10.5 Avg. corrected wind speed: 11.1 Prevailing wind direction: S at 13% Peak gust and direction: 47 NW on 24th SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes: N/A Today's Observations: 7 A.M. Weather: Clear, few cirrostratus Temperature: 63F; Dew Point: 49F; Wind: NE at 10G16 kts Sea-level pressure: 30.16 ins. Hg, rising steadily Visibility: 50 miles, distant haze 6-hr Max temp: 63F 6-hr Min temp: 58F 24-hr Precip: 0.00 ins. 24-hr snowfall: 0.0 ins. Snow depth: 0 ins. BHO SA 1155 CLR 50 212/63/49/0510G16/016/ FEW CS DSNT HZ ALQDS/ 8/005 51028 10063 20058 10 A.M. Weather: Scattered cirrostratus Temperature: 69F; Dew Point: 46F; Wind: E at 11G18 kts Sea-level pressure: 30.19 ins. Hg, steady, then rising Visibility: 40 miles, distant haze 3-hr Precip: 0.00 ins. BHO SA 1155 250 SCT 40 222/69/46/0811G18/019/ DSNT HZ ALQDS/ 8/005 51010 1 P.M. Weather: Scattered cirrus Temperature: 74F; Dew Point: 46F; Wind: E at 4 kts, Wind: Light and variable Sea-level pressure: 30.19 ins. Hg, steady Visibility: 30 miles, distant haze 6-hr Max temp: 74F 6-hr Min temp: 63F 6-hr Precip: 0.00 ins. BHO SA 1455 250 SCT 30 222/74/46/0804/019/ DSNT HZ ALQDS WND L/V/ 8/002 50000 10074 20063 SUMMARY FOR FRIDAY, JUNE 7, 2019 TEMPERATURE (DEGREES F) MAX.....80 NORMAL.....73 MIN.....59 NORMAL.....55 MEAN....70 NORMAL.....64 DEPARTURE FROM 30-YEAR NORMAL......................+6 TOTAL DEPARTURE FOR THE MONTH.....................+13 [+1.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............0 DEPARTURE.........-4 TOTAL HEATING UNITS FOR THE MONTH..............13 DEPARTURE........-17 TOTAL HEATING UNITS FOR THE SEASON...........6232 DEPARTURE.......-101 TOTAL HEATING UNITS LAST SEASON TO DATE......5897 DIFFERENCE......+335 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............5 DEPARTURE.........+3 TOTAL COOLING UNITS FOR THE MONTH..............13 DEPARTURE.........-1 TOTAL COOLING UNITS FOR THE SEASON.............21 DEPARTURE........-17 TOTAL COOLING UNITS LAST SEASON TO DATE........69 DEPARTURE........-48 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................23 S AT 6:41 P.M. AERO.........................23 S AT 7:41 P.M. ASOS.........................23 S AT 7:56 P.M. DAVIS........................23 S AT 7:31 P.M. RMY 22 FASTEST MILE FOR YESTERDAY......................17 S AT 7:31 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................17 S AT 7:31 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................17 S AT 7:31 P.M. AVERAGE WIND SPEED AND DIRECTION................8.9 S ASOS.........................8.9 DAVIS........................8.9 SSE [159 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE.......-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.13 DEPARTURE.......-1.03 ASOS..............0.13 TOTAL PRECIPITATION FOR THE YEAR..........26.02 DEPARTURE.......+2.20 ASOS.............25.86 PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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 M: Missing data 05/01 57/40/49/-4/0.00/0.0/.../.. 21 S AERO 21 SSE RMY 21 05/02 45/41/43/-10/0.02/0.0/.../.. 21 NE AERO 21 SSW RMY 20 05/03 60/43/52/-1/..../0.0/.../.. 23 S AERO 23 S RMY 22 05/04 54/46/50/-4/..../0.0/.../.. 14 ENE AERO 14 ENE RMY 17 05/05 52/44/48/-6/0.00/0.0/.../.. 18 NE AERO 20 NE RMY N/A 05/06 58/44/51/-3/..../0.0/.../.. 25 NE AERO 26 ENE RMY 24 05/07 72/41/57/+2/0.12/0.0/.../.. 30 S AERO 29 S RMY 30 05/08 67/48/58/+3/0.00/0.0/.../.. 20 NE AERO 20 NE RMY 19 05/09 60/43/52/-3/0.00/0.0/.../.. 21 SE AERO 21 E RMY 22 05/10 61/46/54/-1/0.16/0.0/.../.. 35 S AERO 37 S RMY 37 05/11 68/50/59/+3/..../.../.../.. 26 NW AERO M M RMY N/A 05/12 50/36/43/-13/0.68/T/.../.. 30 ENE AERO M M RMY N/A 05/13 52/38/45/-11/..../.../.../.. 35 E AERO M M RMY 34 05/14 44/38/41/-16/..../.../.../.. 26 NNE AERO M M RMY 25 05/15 58/40/49/-8/..../.../.../.. 28 NW AERO M M RMY 28 05/16 68/46/57/0/..../.../.../.. 17 NW AERO M M RMY 19 05/17 64/49/57/0/..../.../.../.. 22 WNW AERO 21 WNW RMY 25 05/18 72/49/61/+3/..../.../.../.. 26 SSE AERO 25 SSE RMY 29 05/19 69/50/60/+2/..../.../.../.. 39 S AERO 43 SSE RMY 42 05/20 85/52/69/11/..../.../.../.. 35 SW AERO 40 SW RMY 39 05/21 69/52/61/+2/0.00/.../.../.. 40 NW AERO 46 NW RMY 45 05/22 68/49/59/0/0.00/.../.../.. 32 NNW AERO 29 NW RMY N/A 05/23 68/48/58/-1/..../.../.../.. 36 SSW AERO 37 SSW RMY 40 05/24 68/47/58/-1/..../.../.../.. 47 NW AERO 47 NW RMY 51 05/25 75/47/61/+1/..../.../.../.. M M AERO 35 SSW RMY 39 05/26 85/49/67/+7/..../0.0/.../.. 40 W AERO 38 W RMY 39 05/27 76/57/67/+7/..../0.0/.../.. 30 NE AERO 22 NE RMY 27 05/28 57/48/53/-8/..../0.0/.../.. 26 E AERO 22 ESE RMY 25 05/29 51/45/48/-13/..../0.0/.../.. 21 NNW AERO 21 NNW RMY N/A 05/30 63/46/55/-6/..../0.0/.../.. 23 S AERO 23 S RMY 25 05/31 72/54/63/2/..../0.0/.../.. 28 N AERO 23 N RMY 26 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 M: Missing data 06/01 71/54/63/+1/0.00/.../.. 21 E AERO 20 E RMY 18 06/02 75/51/63/+1/..../.../.. 23 S AERO 21 S RMY N/A 06/03 69/50/60/-2/..../.../.. 41 W AERO 39 W RMY 43 06/04 70/45/58/-5/0.00/.../.. 29 W AERO 23 W RMY N/A 06/05 81/57/69/+6/..../.../.. 33 SSW AERO 33 SSW RMY N/A 06/06 75/62/69/+6/..../.../.. 28 SSW AERO 28 SSW RMY N/A 06/07 80/59/70/+6/0.00/.../.. 23 S AERO 23 S RMY 22 06/08 Low temp since midnight is 58F; normal low is 55F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 8 HIGH 94F IN 1984 LOW 37F IN 1932 PRECIP 1.53 INS IN 1947 PEAK GUST 86e MPH WNW IN 1946 [Record for month] RECORDS FOR JUNE 9 HIGH 94F IN 2008 LOW 40F IN 1980 PRECIP 2.08 INCHES IN 1931 PEAK GUST 67 MPH NW IN 1973 TODAY'S REPORT PREPARED BY: Benjamin Turner