BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, JUNE 19, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME OVERCAST WITH BREAKS AROUND NOONTIME FOLLOWING SOME OVERNIGHT RAINFALL.... We observed foggy conditions with a very light drizzle this morning, only leaving a trace in the gauge by 1 P.M. Rain overnight amounted to 0.10 inches by 7 A.M. Skies have been overcast, with some breaks allowing some afternoon sunshine. Fog has decreased since this morning, allowing a visibility of 40 miles this afternoon. The high so far today is 73F, 3 degrees below the daily maximum temperature of 76F. Our low since midnight was 61F, which is 3 degrees above our normal minimum temperature for today of 58F. 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: Light drizzle Temperature: 63F; Dew Point: 63F; Wind: E at 3 kts, Wind: Light and variable Sea-level pressure: 29.90 ins. Hg, rising, then more slowly Visibility: 1 mile, fog 6-hr Max temp: 63F 6-hr Min temp: 63F 24-hr Precip: 0.10 ins. BHO SA 1155 X W3 1L-F 125/63/63/0903/990/ WND L/V L-CTD/ 8//// 70010 51006 10064 20061 10 A.M. Weather: Overcast stratocumulus Temperature: 65F; Dew Point: 63F; Wind: SE at 3 kts, Wind: Light and variable Sea-level pressure: 29.90 ins. Hg, falling, then more slowly Visibility: 25 miles, distant fog 3-hr Precip: Trace BHO SA 1455 E16 OVC 25 124/65/63/1303/990/ DSNT FG ALQDS WND L/V/ 8/4// 600// 56001 1 P.M. Weather: Overcast stratocumulus, break in overcast overhead Temperature: 71F; Dew Point: 62F; Wind: SE at 7 kts Sea-level pressure: 29.88 ins. Hg, falling, then more slowly Visibility: 40 miles, distant fog 6-hr Max temp: 73F 6-hr Min temp: 63F 6-hr Precip: Trace BHO SA 1755 E30 OVC 40 117/71/62/1507/988/ DSNT FG ALQDS BINOVC OVHD/ 8/4// 600// 58007 10073 20063 SUMMARY FOR TUESDAY, JUNE 18, 2019 TEMPERATURE (DEGREES F) MAX.....71   NORMAL.....76 MIN.....62   NORMAL.....58 MEAN....67   NORMAL.....67 DEPARTURE FROM 30-YEAR NORMAL.......................0 TOTAL DEPARTURE FOR THE MONTH......................+6 [+0.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE.........-2 TOTAL HEATING UNITS FOR THE MONTH..............31   DEPARTURE........-29 TOTAL HEATING UNITS FOR THE SEASON...........6250   DEPARTURE.......-113 TOTAL HEATING UNITS LAST SEASON TO DATE......5909   DIFFERENCE......+341 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............2   DEPARTURE.........-2 TOTAL COOLING UNITS FOR THE MONTH..............29   DEPARTURE........-18 TOTAL COOLING UNITS FOR THE SEASON.............37   DEPARTURE........-34 TOTAL COOLING UNITS LAST SEASON TO DATE.......102   DEPARTURE........-65 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................17*S   AT  1:03 P.M.                    AERO.........................17 S   AT  1:05 P.M.                    ASOS.........................16 S   AT  1:05 P.M.                    DAVIS........................18 S   AT  1:04 P.M.  RMY 16 FASTEST MILE FOR YESTERDAY.......................9 S   AT  1:02 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................12 S   AT  1:05 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................13 S   AT  1:04 P.M. AVERAGE WIND SPEED AND DIRECTION..............3.9 S                    ASOS.......................3.9                    DAVIS......................4.6 SSE [167 deg.]   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.10  DEPARTURE.......-0.04                          ASOS..............0.10 TOTAL PRECIPITATION FOR THE MONTH..........2.47  DEPARTURE.......-0.39                          ASOS..............2.47 TOTAL PRECIPITATION FOR THE YEAR..........28.26  DEPARTURE.......+2.74                          ASOS.............28.20 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/-1/0.07/0.0/000/00           23 S   AERO 23 S    RMY 22 05/04 54/46/50/-4/0.05/0.0/000/00           14 ENE AERO 14 ENE  RMY 17 05/05 52/44/48/-6/0.04/0.0/000/00           18 NE  AERO 20 NE   RMY N/A 05/06 58/44/51/-3/0.02/0.0/505/59           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/+3/0.00/0.0/763/88           26 NW  AERO M  M    RMY N/A 05/12 50/36/43/-13/0.71/T/000/00            30 ENE AERO M  M    RMY N/A 05/13 52/38/45/-11/0.91/0.0/113/13          35 E   AERO M  M    RMY 34 05/14 44/38/41/-16/0.34/0.0/000/00          26 NNE AERO M  M    RMY 25 05/15 58/40/49/-8/0.00/0.0/587/67           28 NW  AERO M  M    RMY 28 05/16 68/46/57/0/0.00/0.0/615/70            17 NW  AERO M  M    RMY 19 05/17 64/49/57/0/0.07/0.0/062/07            22 WNW AERO 21 WNW  RMY 25 05/18 72/49/61/+3/0.00/0.0/811/92           26 SSE AERO 25 SSE  RMY 29 05/19 69/50/60/+2/0.13/0.0/345/39           39 S   AERO 43 SSE  RMY 42 05/20 85/52/69/11/0.36/0.0/408/46           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/-1/0.25/0.0/080/09           36 SSW AERO 37 SSW  RMY 40 05/24 68/47/58/-1/0.02/0.0/000/00           47 NW  AERO 47 NW   RMY 51 05/25 75/47/61/+1/0.14/0.0/617/69           M  M   AERO 35 SSW  RMY 39 05/26 85/49/67/+7/0.23/0.0/645/72           40 W   AERO 38 W    RMY 39 05/27 76/57/67/+7/0.00/0.0/798/89           30 NE  AERO 22 NE   RMY 27 05/28 57/48/53/-8/0.31/0.0/009/01           26 E   AERO 22 ESE  RMY 25 05/29 51/45/48/-13/0.04/0.0/000/00          21 NNW AERO 21 NNW  RMY N/A 05/30 63/46/55/-6/0.36/0.0/000/00           23 S   AERO 23 S    RMY 25 05/31 72/54/63/2/0.26/0.0/786/87            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 79/54/67/+1/0.00/.../..               38 SSW AERO 41 SSW RMY 40 06/16 70/62/66/0/..../.../..                32 SW  AERO 35 SW  RMY N/A 06/17 74/62/68/+1/..../.../..               12 SSE AERO 18 NW  RMY 17 06/18 71/62/67/0/..../.../..                17*S   AERO 17 S   RMY 16 06/19 Low temp since midnight is 61F; normal low is 58F *Estimated DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 19 HIGH 92F IN 1923 LOW 40F IN 1920 PRECIP 3.92 INS 1922 PEAK GUST 66e MPH NW IN 1940 RECORDS FOR JUNE 20 HIGH 94F IN 1953 LOW 41F IN 1918 PRECIP 2.62 INS 1945 PEAK GUST 63 MPH NE IN 1967, SSW IN 2010 TODAY'S REPORT PREPARED BY: Benjamin Turner