BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JUNE 15, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME MOSTLY SUNNY AND SEASONABLY WARM TODAY... Partial middle and high level clouds earlier this morning drifted away to leave a mostly sunny sky by early afternoon. The visibility has been very good near 70 miles all day with some light distant haze partly obscuring the most distant mountains. The air has dried from the rain on Thursday with the dew point holding in the upper 40s today and the relative humidity dropping to near 30%. The wind has picked up since sunrise with a peak gust to 29 kts, 33 mph, from the SSW at 14:33 PM EST. The high so far today is 79F, four degrees above the daily normal maximum of 75F, and the low since midnight is 54F, three degrees below the daily normal minimum of 57F. 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: 4.61 [+0.50] Greatest in 24 hrs: 1.24 ins. on the 13th-14th 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: 10362 minutes of possible 26226 or 40% Astronomical total minutes:   10733 minutes of possible 27166 or 40% Today's Observations: 7 A.M. Weather: Scattered altocumulus (2 layers), thin scattered cirrus, few cirrocumulus overhead-NE Temperature: 62F; Dew Point: 49F; Wind: W at 10 kts Sea-level pressure: 30.11 ins. Hg, rising then more slowly Visibility: 70 miles, light distant haze 6-hr Max temp: 62F 6-hr Min temp: 54F 24-hr Precip: 0.00 ins. BHO SA 1155 120 SCT 150 SCT 250 -SCT 70 196/62/49/2610/011/ FEW CC OVHD-NE LGT DSNT HZ/ 8/031 51017 10062 20054 10 A.M. Weather: Scattered altocumulus, thin broken cirrus Temperature: 74F; Dew Point: 46F; Wind: SW at 12G18 kts Sea-level pressure: 30.08 ins. Hg, falling then more quickly Visibility: 65 miles, light distant haze 3-hr Precip: 0.00 ins.   BHO SA 1455 150 SCT 250 –BKN 65 187/74/46/2312G18/008/ LGT DSNT HZ/ 8/071 58009 1 P.M. Weather: Thin scattered cirrus, few altocumulus all quadrants, few altocumulus lenticularis W-NW Temperature: 78F; Dew Point: 47F; Wind: SW at 13G19 kts Sea-level pressure: 30.01 ins. Hg, falling then more quickly Visibility: 70 miles 6-hr Max temp: 79F 6-hr Min temp: 62F 6-hr Precip: 0.00 ins. BHO SA 1755 250 –SCT 70 163/78/47/2213G19/001/ FEW AC ALQDS FEW ACSL W-NW PK WND 2226/34/ 8/041 58024 10079 20062 SUMMARY FOR FRIDAY, JUNE 14, 2019 TEMPERATURE (DEGREES F) MAX.....72   NORMAL.....75 MIN.....50   NORMAL.....57 MEAN....61   NORMAL.....66 DEPARTURE FROM 30-YEAR NORMAL......................-5 TOTAL DEPARTURE FOR THE MONTH......................+4 [+0.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............4   DEPARTURE.........+1 TOTAL HEATING UNITS FOR THE MONTH..............31   DEPARTURE........-20 TOTAL HEATING UNITS FOR THE SEASON...........6250   DEPARTURE.......-104 TOTAL HEATING UNITS LAST SEASON TO DATE......5905   DIFFERENCE......+345 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE.........-3 TOTAL COOLING UNITS FOR THE MONTH..............21   DEPARTURE........-12 TOTAL COOLING UNITS FOR THE SEASON.............29   DEPARTURE........-28 TOTAL COOLING UNITS LAST SEASON TO DATE........78   DEPARTURE........-49 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................38 W   AT  6:53 P.M.                    AERO.........................39 W   AT  6:55 P.M.*                    ASOS.........................38 W   AT  6:53 P.M.                    DAVIS........................38 WSW AT  4:46 P.M.  RMY 38 FASTEST MILE FOR YESTERDAY......................28 W   AT  4:47 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................28 W   AT  4:48 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................29 WSW AT  5:36 P.M. AVERAGE WIND SPEED AND DIRECTION..............15.1 W                    ASOS.......................14.6                    DAVIS......................14.8 SW [229 deg.] * Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.......-0.15                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.24  DEPARTURE.......-0.04                          ASOS..............2.27 TOTAL PRECIPITATION FOR THE YEAR..........28.03  DEPARTURE.......+3.09                          ASOS.............28.00 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/-4/0.00/0.0/025/03           21 S   AERO 21 SSE  RMY 21 05/02 45/41/43/-10/0.02/0.0/000/00          21 NE  AERO 21 SSW  RMY 20 05/03 60/43/52/-1/..../0.0/000/00           23 S   AERO 23 S    RMY 22 05/04 54/46/50/-4/..../0.0/000/00           14 ENE AERO 14 ENE  RMY 17 05/05 52/44/48/-6/0.00/0.0/000/00           18 NE  AERO 20 NE   RMY N/A 05/06 58/44/51/-3/..../0.0/505/59           25 NE  AERO 26 ENE  RMY 24 05/07 72/41/57/+2/0.12/0.0/566/66           30 S   AERO 29 S    RMY 30 05/08 67/48/58/+3/0.00/0.0/758/88           20 NE  AERO 20 NE   RMY 19 05/09 60/43/52/-3/0.00/0.0/492/57           21 SE  AERO 21 E    RMY 22 05/10 61/46/54/-1/0.16/0.0/043/05           35 S   AERO 37 S    RMY 37 05/11 68/50/59/+3/..../0.0/763/88           26 NW  AERO M  M    RMY N/A 05/12 50/36/43/-13/0.68/T/000/00            30 ENE AERO M  M    RMY N/A 05/13 52/38/45/-11/..../0.0/113/13          35 E   AERO M  M    RMY 34 05/14 44/38/41/-16/..../0.0/000/00          26 NNE AERO M  M    RMY 25 05/15 58/40/49/-8/..../0.0/587/67           28 NW  AERO M  M    RMY 28 05/16 68/46/57/0/..../0.0/615/70            17 NW  AERO M  M    RMY 19 05/17 64/49/57/0/..../0.0/062/07            22 WNW AERO 21 WNW  RMY 25 05/18 72/49/61/+3/..../0.0/811/92           26 SSE AERO 25 SSE  RMY 29 05/19 69/50/60/+2/..../0.0/345/39           39 S   AERO 43 SSE  RMY 42 05/20 85/52/69/11/..../0.0/408/46           35 SW  AERO 40 SW   RMY 39 05/21 69/52/61/+2/0.00/0.0/843/95           40 NW  AERO 46 NW   RMY 45 05/22 68/49/59/0/0.00/0.0/862/97            32 NNW AERO 29 NW   RMY N/A 05/23 68/48/58/-1/..../0.0/080/09           36 SSW AERO 37 SSW  RMY 40 05/24 68/47/58/-1/..../0.0/000/00           47 NW  AERO 47 NW   RMY 51 05/25 75/47/61/+1/..../0.0/617/69           M  M   AERO 35 SSW  RMY 39 05/26 85/49/67/+7/..../0.0/645/72           40 W   AERO 38 W    RMY 39 05/27 76/57/67/+7/..../0.0/798/89           30 NE  AERO 22 NE   RMY 27 05/28 57/48/53/-8/..../0.0/009/01           26 E   AERO 22 ESE  RMY 25 05/29 51/45/48/-13/..../0.0/000/00          21 NNW AERO 21 NNW  RMY N/A 05/30 63/46/55/-6/..../0.0/000/00           23 S   AERO 23 S    RMY 25 05/31 72/54/63/2/..../0.0/786/87            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 75/64/70/+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 78/57/68/+4/0.00/.../..               23 ENE AERO 21 SW  RMY 21 06/09 78/55/67/+3/0.00/.../..               22 S   AERO 21 S   RMY 21 06/10 79/54/67/+2/..../.../..               26 SSE AERO 25 SSE RMY 33 06/11 73/58/66/+1/..../.../..               32 NW  AERO 30 NW  RMY 35 06/12 75/52/64/-1/..../.../..               25 SSW AERO 25 S   RMY 28 06/13 55/49/52/-13/..../.../..              36 NE  AERO 35 NE  RMY 35 06/14 72/50/61/-5/0.00/.../..               38 W   AERO 39 W   RMY 38 06/15 Low temp since midnight is 54F; normal low is 57F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 15 HIGH 94F IN 1988 LOW 42F IN 1959, 1978 PRECIP 2.04 INS IN 1903 PEAK GUST 52 MPH SW IN 1972 RECORDS FOR JUNE 16 HIGH 92F IN 1891, 1967 LOW 44F IN 1926 PRECIP 2.17 INS IN 1931 PEAK GUST 55 MPH W IN 1958 TODAY'S REPORT PREPARED BY: Mike Iacono