BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JUNE 13, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME AN OVERCAST DAY WITH SHOWERS AND INCREASING WIND DURING THE EARLY AFTERNOON… Overcast throughout the day with passing showers during the morning, turning to steady rain during the early afternoon. 0.56 Inches has rain has fallen in the past 6 hours since the 1 P.M observation with pressure fall rapidly in the past 3 hour with a pressure trend of -5.1 millibars. Winds have increased since this morning with a peak wind of 32 MPH observed at 12:51 P.M. The high so far today is 54F, 20 degrees below the daily normal maximum of 74F. The low since midnight is 50F, 6 degrees below the daily normal minimum of 56F. 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: 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: Light rain, overcast nimbostratus Temperature: 54F; Dew Point: 50F; Wind: ESE at 11 kts Sea-level pressure: 30.04 ins. Hg, rising, then steady Visibility: 45 miles 6-hr Max temp: 55F 6-hr Min temp: 35F 24-hr Precip: 0.01 ins. 24-hr snowfall: 0.0 ins. Snow depth: 0 ins. BHO SA 1155 E120 BKN 45R- 175/54/50/1114/004/ 8/02/ R-CTD/ 70001 56015 10055 20035 10 A.M. Weather: light drizzle, scattered stratus fractus, overcast nimbostratus Temperature: 51F; Dew Point: 51F; Wind: E at 14 kts, Sea-level pressure: 29.99 ins. Hg, rising, then more quickly Visibility: 35 miles, 10 miles N-NNE 3-hr Precip: 0.00 ins.   BHO SA 1145 E10 SCT E55 OVC 35L- 156/51/51/1014/999/ DSNT FG ALQDS VSBY 10 N-NNE/ 8/72/ 6008/ 58019 1 P.M. Weather: Rain and Fog Temperature: 50F; Dew Point: 50F; Wind: S at 17G30 kts, Peak wind: 32 MPH (28kts) NE @ 1251E Sea-level pressure: 29.84 ins. Hg, falling, then more quickly Visibility: 1 miles 6-hr Max temp: 54F 6-hr Min temp: 50F 6-hr Precip: 0.56 ins. BHO SA 1755 W3 X 1RF 105/50/50/0517G30/984/ VSBY 1 S-SSW WND/0532/51/ RCTD PK/ 8//// 6056/ 58051 10054 20050 SUMMARY FOR WEDNESDAY, JUNE 12, 2019 TEMPERATURE (DEGREES F) MAX.....75   NORMAL.....74 MIN.....52   NORMAL.....56 MEAN....64   NORMAL.....65 DEPARTURE FROM 30-YEAR NORMAL......................-1 TOTAL DEPARTURE FOR THE MONTH.....................+22 [+1.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............1   DEPARTURE.........+1 TOTAL HEATING UNITS FOR THE MONTH..............14   DEPARTURE........-32 TOTAL HEATING UNITS FOR THE SEASON...........6232   DEPARTURE.......-116 TOTAL HEATING UNITS LAST SEASON TO DATE......5905   DIFFERENCE......+328 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE.........-1 TOTAL COOLING UNITS FOR THE MONTH..............21   DEPARTURE.........-6 TOTAL COOLING UNITS FOR THE SEASON.............29   DEPARTURE........-22 TOTAL COOLING UNITS LAST SEASON TO DATE........74   DEPARTURE........-45 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................25  SSW  AT  6:59 P.M.                    AERO.........................25  S    AT  7:04 P.M.                    ASOS.........................26  S    AT  7:01 P.M.                    DAVIS........................27  S    AT  7:01 P.M.  RMY 28 FASTEST MILE FOR YESTERDAY......................20  SSW  AT  7:04 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................18  S    AT  7:03 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................20  S    AT  7:02 P.M. AVERAGE WIND SPEED AND DIRECTION.................9.7 NW                    ASOS..........................10.2                    DAVIS.........................10.1 SW [228 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01  DEPARTURE.......-0.15                          ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH..........1.44  DEPARTURE.......-0.53                          ASOS..............1.44 TOTAL PRECIPITATION FOR THE YEAR..........27.23  DEPARTURE.......+2.60                          ASOS.............27.17 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/..../0.0/.../..           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/..../0.0/.../..          35 E   AERO M  M    RMY 34 05/14 44/38/41/-16/..../0.0/.../..          26 NNE AERO M  M    RMY 25 05/15 58/40/49/-8/..../0.0/.../..           28 NW  AERO M  M    RMY 28 05/16 68/46/57/0/..../0.0/.../..            17 NW  AERO M  M    RMY 19 05/17 64/49/57/0/..../0.0/.../..     22 WNW AERO 21 WNW  RMY 25 05/18 72/49/61/+3/..../0.0/.../..           26 SSE AERO 25 SSE  RMY 29 05/19 69/50/60/+2/..../0.0/.../..           39 S   AERO 43 SSE  RMY 42 05/20 85/52/69/11/..../0.0/.../..    35 SW  AERO 40 SW   RMY 39 05/21 69/52/61/+2/0.00/0.0/.../..           40 NW  AERO 46 NW   RMY 45 05/22 68/49/59/0/0.00/0.0/.../..            32 NNW AERO 29 NW   RMY N/A 05/23 68/48/58/-1/..../0.0/.../..    36 SSW AERO 37 SSW  RMY 40 05/24 68/47/58/-1/..../0.0/.../..    47 NW  AERO 47 NW   RMY 51 05/25 75/47/61/+1/..../0.0/.../..    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 75/64/70/+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 Low temp since midnight is 53F; normal low is 56F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 13 HIGH 93F IN 1988 LOW 43F IN 1982 PRECIP 6.07 INS 1998 [Record for month] PEAK GUST 69 MPH N IN 1956 RECORDS FOR JUNE 13 HIGH 93F IN 1988 LOW 43F IN 1982 PRECIP 6.07 INS 1998 [Record for month] PEAK GUST 69 MPH N IN 1956 TODAY'S REPORT PREPARED BY: Nicholas Rousseau