BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, MAY 6, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME MILD AND COOL WITH OVERCAST CONDITIONS IN THE AFTERNOON.... Today has been mostly cloudy, with a great 75 miles of visibility. Skies became overcast with a layer of stratus clouds as the day went on. Wind was northeasterly, with a constant speed around 10 mph. The max gust so far today is 22 mph. The high so far today is 54F, this is 10 degrees below our daily normal high temperature of 64F. The low since midnight is 38F, which is 7 degrees below the daily normal low of 45F. Today's Observations: 7 A.M. Weather: Scattered altocumulus, broken cirrus Temperature: 47F; Dew Point: 36F; Relative Humidity: 65% Wind: NE at 7 kts   Sea-level pressure: 29.94 ins. Hg: rising, then steady Visibility: 75 miles 6-hr Max temp: 47F 6-hr Min temp: 38F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 130 SCT E250 BKN 75 139/47/36/0507/994/ 8/072 53004 10047 20038 10 A.M. Weather: Scattered altocumulus Temperature: 52F; Dew Point: 35F; Relative Humidity: 52% Wind: NE at 10 kts Sea-level pressure: 29.91 ins. Hg: falling steadily Visibility: 75 miles 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 E130 BKN 75 131/52/35/0610/991/ FEW CU ALQDS/ 8/170 58008 1 P.M. Weather: Scattered cumulus, broken cirrus and altocumulus Temperature: 54F; Dew Point: 33F; Relative Humidity: 44% Wind: NE at 11G17 kts Sea-level pressure: 29.89 ins. Hg: falling steadily Visibility: 75 miles 6-hr Max temp: 54F 6-hr Min temp: 47F 6-hr Precip:  0.00 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 40 SCT E130 BKN 250 BKN 75 123/54/33/0511G17/989/ 8/172 58008 10054 20047 SUMMARY FOR TUESDAY, MAY 5, 2020 TEMPERATURE (DEGREES F) MAX.....60   NORMAL.....63 MIN.....40   NORMAL.....45 MEAN....50   NORMAL.....54 DEPARTURE FROM 30-YEAR NORMAL.................. -4 TOTAL DEPARTURE FOR THE MONTH..................+23 [+4.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............15  DEPARTURE....... +4 TOTAL HEATING UNITS FOR THE MONTH...............37  DEPARTURE.......-23 TOTAL HEATING UNITS FOR THE SEASON............5558  DEPARTURE......-537 TOTAL HEATING UNITS LAST SEASON TO DATE.......5983  DEPARTURE......-425 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL HEATING UNITS FOR YESTERDAY................0  DEPARTURE........ 0 TOTAL HEATING UNITS FOR THE MONTH................2  DEPARTURE........+1 TOTAL HEATING UNITS FOR THE SEASON...............2  DEPARTURE........-1 TOTAL HEATING UNITS LAST SEASON TO DATE..........0  DEPARTURE........+2 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................31 NW  AT  7:00 A.M.                      AERO.........................32 NW  AT  6:43 A.M.                     ASOS.........................31 NW  AT  7:12 A.M.                    DAVIS........................32 NW  AT  6:49 A.M. RMY N/A FASTEST MILE FOR YESTERDAY......................24 NW  AT  7:40 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................23 NW  AT  7:40 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................24 NW  AT  7:41 A.M. AVERAGE WIND SPEED AND DIRECTION................12.7 NW                                  ASOS.........................12.7                    DAVIS........................12.9 NW [317 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.13                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.94  DEPARTURE......+0.32                          ASOS..............0.96 TOTAL PRECIPITATION FOR THE YEAR..........17.97  DEPARTURE......-1.20                          ASOS.............18.60 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........0.0 TOTAL SNOWFALL FOR THE MONTH................0.0  DEPARTURE........0.0 TOTAL SNOWFALL FOR THE SEASON..............31.9  DEPARTURE......-30.8 PRELIMINARY CLIMATE SUMMARY FOR APRIL 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 04/01  42/28/35/-6/0.00/0.0/008/01         28 NE  AERO 28 NE  RMY 30 04/02  46/35/41/0/.../0.0/000/00           39 NW  AER0 40 NW  RMY 41 04/03  42/38/40/-2/..../0.0/000/00         48 NE  AERO 53 NE  RMY 49 04/04  46/36/41/-1/..../0.0/278/36         38 NE  AERO 38 NE  RMY N/A 04/05  55/36/46/+3/T/0.0/039/05            22 S   AERO 21 S   RMY 21 04/06  61/40/51/+8/0.00/0.0/732/94         29 NW  AERO 30 NW  RMY 29 04/07  63/42/53/+10/0.00/0.0/649/83        29 W   AERO 30 W   RMY 28 04/08  50/41/46/+2/..../.../047/06         23 S   AERO 22 S   RMY 22 04/09  47/37/42/-2/..../.../000/00         58 W   AERO 58 W   RMY 56 04/10  47/35/41/-4/0.02/T/324/41           48 W   AERO 50 W   RMY 53 04/11  51/33/42/-3/0.00/0.0/730/92         38 WNW AERO 39 WNW RMY 40 04/12  60/33/47/+2/0.00/0.0/326/41         38 S   AERO 40 S   RMY N/A 04/13  59/50/55/+9/1.42/0.0/000/00         79 S   AERO 83 S   RMY 78 04/14  57/41/49/+3/0.00/0.0/641/80         41 W   AERO 40 W   RMY N/A 04/15  52/36/44/-3/0.02/0.0/450/56         37 W   AERO 36 W   RMY 37 04/16  47/32/40/-7/T/T/379/47              33 WNW AERO 33 WNW RMY 32 04/17  49/29/39/-8/..../0.0/591/73         41 W   AERO 39 W   RMY 41 04/18  37/31/34/-14/..../4.3/000/00        29 NE  AERO 25 NE  RMY 25 04/19  60/31/46/-2/0.00/0.0/693/85         40 SSW AERO 40 SSW RMY 41 04/20  49/37/43/-6/0.00/0.0/.../..         25 ENE AERO 22 W   RMY N/A 04/21  53/33/43/-6/..../.../.../..         52 S   AERO 52 S   RMY 52 04/22  43/30/37/-12/0.00/0.0/.../..        51 W   AERO 50 W   RMY 50 04/23  55/29/42/-8/0.00/0.0/.../..         31 W   AERO 29 W   RMY N/A 04/24  42/37/40/-10/..../.../.../..        31 NNE AERO 29 NNE RMY 29 04/25  60/38/49/-1/0.00/0.0/.../..         25 S   AERO 24 S   RMY 24 04/26  51/38/45/-6/..../0.0/.../..         51 NE  AERO 50 NE  RMY 50 04/27  39/35/37/-14/..../T/.../..          54 NE  AERO 52 NNE RMY 55 04/28  48/35/42/-10/..../.../.../..        28 N   AERO 27 N   RMY N/A 04/29  55/35/45/-7/0.00/0.0/.../..         24 ENE AERO 23 ENE RMY 22 04/30  52/42/47/-5/.../0.0/.../..          36 SE  AERO 32 SE  RMY N/A DAILY RECORDS FOR APRIL 2020 4/13/2020 NEW PEAK GUST OF 79 MPH S, REPLACING THE OLD RECORD OF 59 MPH SSW IN 1995 4/18/2020 NEW RECORD SNOWFALL OF 4.3 INS, REPLACING THE OLD RECORD OF 3.7 INS IN 1965 4/27/2020 NEW RECORD LOW MAX TEMPERATURE OF 39F, REPLACING THE OLD RECORD OF 40F IN 1917 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/.../..         46 SSE  AERO 44 SSE RMY N/A 05/02  70/42/56/+3/..../0.0/.../..         41 NW   AERO 40 NW  RMY N/A 05/03  78/55/67/+14/0.00/0.0/.../..        35 SSW  AERO 35 SSW RMY 36 05/04  72/45/59/+5/T/0.0/.../..            37 NW   AERO 40 WNW RMY 39   05/05  60/40/50/-4/0.00/0.0/.../..         31 NW   AERO 32 NW  RMY N/A 05/06 The low since midnight is 38F, the daily normal low is 45F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR MAY 6 HIGH 90F IN 1930 LOW 29F IN 1891 PRECIP 1.04 INCHES IN 1890 SNOWFALL TRACE IN 1917,1996 PEAK GUST 65 MPH SSE IN 1989 RECORDS FOR MAY 7 HIGH 93F IN 1930 LOW 33F IN 1970 PRECIP 1.19 INCHES IN 2005 SNOWFALL TRACE IN 1967 PEAK GUST 66e MPH WNW IN 1940 TODAY'S REPORT PREPARED BY: Benjamin Turner