BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, JUNE 1, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME STARTING JUNE ON A COOL, BREEZY, BUT DRY NOTE.... A mix of sun and clouds have been the theme today with a cool northwest breeze and very dry air. Dew points have been in the upper 20s to low 30s which is pretty impressive for early June standards. The dry air has enhanced the chill in the air. As a result of the polar air mass, visibility has been phenomenal averaging 80-90 miles! Temperatures for the day have been below normal with a high so far only 63 degrees, this is 8 degrees below the daily normal high of 71F. The low since midnight is 42F, which is 11 degrees below the daily normal low of 53F. Today's Observations: 7 A.M. Weather: Clear, few cumulonimbus distant NNW-N, few stratocumulus/cumulus distant S and distant NW, few altocumulus distant WSW-NW, few altocumulus castellanus distant NE-SE Temperature: 50F; Dew Point: 36F; Relative Humidity: 58% Wind: NW at 6 kts   Sea-level pressure: 30.20 ins. Hg: rising, then more rapidly Visibility: 90 miles 6-hr Max temp: 50F 6-hr Min temp: 42F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 CLR 90 226/50/36/3306/020/ FEW CB DSNT NNW-N FEW SC/CU DSNT S AND DSNT NW FEW AC DSNT WSW-NW FEW ACC DSNT NE-SE WND LGT/ 8/370 53014 10050 20042 10 A.M. Weather: Scattered cumulus, scattered altocumulus standing lenticular, thin scattered cirrus Temperature: 58F; Dew Point: 31F; Relative Humidity: 35% Wind: NW at 12G20 kts Sea-level pressure: 30.17 ins. Hg: falling, then more rapidly Visibility: 80 miles 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 50 SCT 70 SCT 250 –SCT 80 216/58/31/3212G20/017/ 8/241/ 58010 1 P.M. Weather: Broken cumulus Temperature: 63F; Dew Point: 33F; Relative Humidity: 32% Wind: WNW at 13G24 kts Sea-level pressure: 30.10 ins. Hg: falling, then more slowly Visibility: 80 miles 6-hr Max temp: 63F 6-hr Min temp: 50F 6-hr Precip:  0.00 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 E70 BKN 80 193/63/33/2913G24/010/ 8/200 56023 10063 20050 SUMMARY FOR SUNDAY, MAY 31, 2020 TEMPERATURE (DEGREES F) MAX.....67   NORMAL.....71 MIN.....45   NORMAL.....52 MEAN....56   NORMAL.....61 DEPARTURE FROM 30-YEAR NORMAL................. -5 TOTAL DEPARTURE FOR THE MONTH.................-15 [-0.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY............... 9  DEPARTURE........+4 TOTAL HEATING UNITS FOR THE MONTH..............291  DEPARTURE.......+23 TOTAL HEATING UNITS FOR THE SEASON............5812  DEPARTURE......-491 TOTAL HEATING UNITS LAST SEASON TO DATE.......6218  DEPARTURE......-406 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY................0  DEPARTURE........-1 TOTAL COOLING UNITS FOR THE MONTH...............32  DEPARTURE.......+10 TOTAL COOLING UNITS FOR THE SEASON..............32  DEPARTURE........+8 TOTAL COOLING UNITS LAST SEASON TO DATE..........8  DEPARTURE.......+24 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................33 WNW AT  3:18 P.M.                      AERO.........................33 WNW AT  2:59 P.M.                     ASOS.........................32 WNW AT  3:20 P.M.                    DAVIS........................33 WNW AT  3:19 P.M. RMY 32 FASTEST MILE FOR YESTERDAY......................23 NW  AT 10:51 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................22 WNW AT 10:58 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................23 WNW AT 10:58 A.M. AVERAGE WIND SPEED AND DIRECTION................13.4 NW                                  ASOS.........................13.2                    DAVIS........................13.5 NW [312 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.17                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.75  DEPARTURE......-1.36                          ASOS..............2.71 TOTAL PRECIPITATION FOR THE YEAR..........19.79  DEPARTURE......-2.87                          ASOS.............20.31 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........0.0 TOTAL SNOWFALL FOR THE MONTH..............Trace  DEPARTURE........0.0 TOTAL SNOWFALL FOR THE SEASON..............31.9  DEPARTURE......-30.8 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  64/52/58/+5/..../0.0/000/00         46 SSE  AERO 44 SSE RMY N/A 05/02  70/42/56/+3/..../0.0/729/86         41 NW   AERO 40 NW  RMY N/A 05/03  78/55/67/+14/0.00/0.0/613/72        35 SSW  AERO 35 SSW RMY 36 05/04  72/45/59/+5/T/0.0/247/29            37 NW   AERO 40 WNW RMY 39   05/05  60/40/50/-4/0.00/0.0/821/96         31 NW   AERO 32 NW  RMY N/A 05/06  57/38/48/-6/T/0.0/498/58            24 ESE  AERO 22 ENE RMY 22 05/07  63/37/50/-5/0.00/0.0/576/67         30 WSW  AERO 29 WSW RMY N/A 05/08  57/40/49/-6/..../0.0/328/38         31 W    AERO 32 W   RMY N/A 05/09  44/32/38/-17/..../T/484/56          52 W    AERO 53 W   RMY 54 05/10  59/31/45/-10/0.00/0.0/763/88        46 W    AERO 46 W   RMY 49 05/11  65/43/54/-2/0.22/0.0/322/37         39 S    AERO 43 S   RMY 41 05/12  55/37/46/-10/0.00/0.0/801/92        37 W    AERO 37 W   RMY 37 05/13  59/32/46/-10/0.00/0.0/864/99        37 WNW  AERO 37 WNW RMY 38 05/14  70/40/55/-2/0.00/0.0/831/95         29 W    AERO 26 W   RMY 27 05/15  78/50/64/+7/..../0.0/535/61         40 WSW  AERO 40 WSW RMY 43 05/16  69/47/58/+1/..../0.0/730/83         31 NW   AERO 31 NW  RMY 32 05/17  67/47/57/0/0.00/0.0/132/15          22 SSW  AERO N/A    RMY 21 05/18  60/47/54/-4/T/0.0/053/06            24 W    AERO 22 ENE RMY N/A 05/19  56/45/51/-7/0.00/0.0/797/90         35 ENE  AERO 34 ENE RMY 32 05/20  63/43/53/-5/0.00/0.0/869/98         22 ESE  AERO 20 SE  RMY 19 05/21  76/42/59/0/0.00/0.0/862/97          26 S    AERO 25 S   RMY 25 05/22  82/50/66/+7/0.00/0.0/864/97         29 W    AERO 29 W   RMY 28 05/23  67/44/56/-3/0.02/0.0/187/21         42 ENE  AERO 43 ENE RMY 40 05/24  58/43/51/-8/T/0.0/822/92            27 ENE  AERO 24 ENE RMY N/A 05/25  66/46/56/-4/0.00/0.0/.../..         18 ENE  AERO 18 ENE RMY N/A 05/26  82/56/69/+9/0.00/0.0/.../..         21 S    AERO 21 S   RMY 21 05/27  84/59/72/+12/0.00/0.0/.../..        31 SSW  AERO 31 SSW RMY 31   05/28  77/63/70/+9/.../0.0/.../..          33 SSW  AERO 33 S   RMY 33 05/29  78/66/72/+11/..../.../.../..        41 SSW  AERO 41 SSW RMY 43 05/30  79/63/71/+10/..../.../.../..        30 S    AERO 30 S   RMY N/A 05/31  67/45/56/-5/0.00/0.0/.../..         33 WNW  AERO 33 WNW RMY 32 06/01 The low since midnight is 42F, the daily normal low is 53F   DAILY RECORDS FOR MAY 2020 5/13/2020: NEW RECORD LOW OF 32F, REPLACING 35F SET IN 1914 AND 2005 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR JUNE 1 HIGH 90F IN 1937,2013 LOW 36F IN 1945 [Record for month] PRECIP 2.28 INS IN 1992 PEAK GUST 51e MPH SE IN 1952 RECORDS FOR JUNE 2 HIGH 91F IN 1895 LOW 41F IN 1907, 1929 PRECIP 2.36 INS IN 1982 SNOWFALL TRACE IN 1907 (IP) PEAK GUST 63 MPH NW IN 2000 TODAY'S REPORT PREPARED BY: Matt Douglas