BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, APRIL 5, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME OVERCAST WITH A LIGHT SOUTHEASTERLY WIND AND A DISTANT HAZE.... Today began overcast, with some breaks of sunshine in the afternoon. Visibility was limited, only reaching 35 miles due to a distant haze. Wind was southeasterly with a constant speed under 10 mph. The max gust so far today is 16 mph.         Our high temperature so far today is 52F, which is a degree above our daily normal high temperature of 51F. The low since midnight is 36F, which is 2 degrees above the daily normal low of 34F. PRELIMINARY STATS FOR MARCH 2020 TEMPERATURE, Deg. F Avg. Max. 49.8 [+5.5] Avg. Min. 32.3 [+5.7] Mean      41.4 [+5.9] 24-hour corrected mean: 40.5 Max. for month: 72F on the 9th Min. for month: 15F on the 1st HEATING DEGREE DAYS Total heating units:    733 [-183] Total for the season:  4873 [-611] Total for last season: 5432 PRECIPITATION, Inches Total: 4.67 [-0.91] Greatest in 24 hrs: N/A SNOWFALL, Inches Total: 2.8 [-9.9] Greatest in 24 hrs: N/A WIND, mph Avg. uncorrected wind speed: 12.6 mph Avg. corrected wind speed:   12.9 mph Prevailing wind direction:   W [12%] Peak gust and direction:     56 W on the 4th SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes: N/A Today's Observations: 7 A.M. Weather: Overcast stratus Temperature: 39F; Dew Point: 34F; Relative Humidity: 80% Wind: SSE at 7 kts Sea-level pressure: 30.09 ins. Hg: rising steadily Visibility: 30 miles, distant haze 6-hr Max temp: 39F 6-hr Min temp: 36F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 E40 OVC 30 188/39/34/1607/009/ DSNT HZ ALQDS/ 8/6// 53013 10039 20036 10 A.M. Weather: Overcast stratus Temperature: 49F; Dew Point: 34F; Relative Humidity: 55% Wind: SSE at 7 kts Sea-level pressure: 30.09 ins. Hg: rising steadily Visibility: 35 miles, distant haze 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 E40 OVC 35 189/49/34/1607/009/ DSNT HZ ALQDS/ 8/6// 50001 1 P.M. Weather: Broken stratocumulus Temperature: 52F; Dew Point: 37F; Relative Humidity: 56% Wind: SSE at 7 kts Sea-level pressure: 30.05 ins. Hg: rising then falling Visibility: 35 miles, distant haze 6-hr Max temp: 52F 6-hr Min temp: 39F 6-hr Precip:  0.00 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 E50 BKN 35 175/52/37/1607/005/ DSNT HZ ALQDS/ 8/400 58014 10052 20039 SUMMARY FOR SATURDAY, APRIL 4, 2020 TEMPERATURE (DEGREES F) MAX.....46   NORMAL.....51 MIN.....36   NORMAL.....33 MEAN....41   NORMAL.....42 DEPARTURE FROM 30-YEAR NORMAL....................-1 TOTAL DEPARTURE FOR THE MONTH....................-9 [-2.5 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............24  DEPARTURE........+1 TOTAL HEATING UNITS FOR THE MONTH..............103  DEPARTURE........+9 TOTAL HEATING UNITS FOR THE SEASON............4976  DEPARTURE......-602 TOTAL HEATING UNITS LAST SEASON TO DATE.......5497  DEPARTURE......-521 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................38 NE  AT  2:18 A.M.                      AERO.........................38 NE  AT  2:19 A.M                     ASOS.........................39 NNE AT  2:17 A.M.                    DAVIS........................38 ENE AT  2:01 A.M. RMY N/A FASTEST MILE FOR YESTERDAY......................27 NE  AT  2:16 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................25 NE  AT  2:17 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................28 NE  AT  2:16 A.M. AVERAGE WIND SPEED AND DIRECTION..............11.9 NE                                  ASOS.......................12.2                    DAVIS......................12.1 ENE [62 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..........2.72  DEPARTURE......+2.04                          ASOS..............2.82 TOTAL PRECIPITATION FOR THE YEAR..........12.05  DEPARTURE......-2.63                          ASOS.............12.55 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.2 TOTAL SNOWFALL FOR THE MONTH................0.0  DEPARTURE.......-0.8 TOTAL SNOWFALL FOR THE SEASON..............27.6  DEPARTURE......-32.9 PRELIMINARY CLIMATE SUMMARY FOR MARCH 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 03/01  33/15/24/-7/0.00/0.0/676/100        28 WNW AERO 28 WNW RMY 27 03/02  52/24/38/+7/T/T/482/71              40 S   AERO 39 S   RMY 41 03/03  64/45/55/+23/..../0.0/361/53        30 S   AERO 30 S   RMY N/A 03/04  50/38/44/+12/..../0.0/561/82        56 W   AERO 56 W   RMY 58 03/05  51/32/42/+10/0.00/0.0/666/97        31 W   AERO 31 NW  RMY 32 03/06  47/30/39/+7/..../.../283/41         46 NE  AERO 45 NE  RMY 46 03/07  43/26/35/+2/..../.../534/77         42 N   AERO 43 N   RMY 44 03/08  53/26/40/+7/0.00/0.0/508/73         31 W   AERO 30 W   RMY 28 03/09  72/40/56/+23/0.00/0.0/685/98        32 SW  AERO 32 SW  RMY 31 03/10  68/49/59/+26/0.00/0.0/246/35        48 WSW AERO 46 WSW RMY 49 03/11  56/37/47/+13/0.00/0.0/501/71        31 WNW AERO M  M   RMY 21 03/12  46/31/39/+5/..../0.0/156/22         21 SE  AERO 18 SE  RMY N/A 03/13  59/38/49/+15/..../0.0/000/00        46 WNW AERO 44 WNW RMY 46 03/14  51/35/43/+8/0.00/0.0/613/86         37 W   AERO 36 W   RMY 35 03/15  47/28/38/+3/0.00/0.0/680/95         28 NW  AERO 28 NW  RMY N/A 03/16  36/22/29/-6/0.00/0.0/618/86         21 NE  AERO 21 ESE RMY 21 03/17  43/28/36/0/..../0.4/000/00          29 W   AERO 30 W   RMY 29 03/18  54/31/43/+7/..../0.0/609/84         26 S   AERO 26 S   RMY 26 03/19  43/37/40/+4/..../0.0/000/00         36 E   AERO 35 E   RMY 34 03/20  66/37/52/+15/..../0.0/000/00        48 W   AERO 48 W   RMY 46 03/21  55/29/42/+5/0.00/0.0/535/73         45 W   AERO 48 W   RMY N/A 03/22  36/23/30/-7/0.00/0.0/692/94         23 NE  AERO 24 NE  RMY 23 03/23  40/25/33/-5/..../1.6/037/05         38 NNE AERO 39 NNE RMY 38 03/24  48/33/41/+3/..../.../148/20         37 NNW AERO 37 NNW RMY N/A 03/25  41/35/38/0/0.03/0.0/000/00          28 ENE AERO 28 ENE RMY 27 03/26  51/30/41/+2/..../0.0/613/82         25 SSE AERO 26 SSW RMY N/A 03/27  61/41/51/+12/..../0.0/.../..        32 NW  AERO M  M   RMY 33 03/28  56/36/46/+7/..../0.0/.../..         22 S   AERO 21 E   RMY N/A 03/29  43/37/40/0/..../0.0/.../..          32 NE  AERO 33 NE  RMY 33 03/30  40/34/37/-3/..../0.0/.../..         33 NE  AERO 33 NE  RMY 33 03/31  40/29/35/-6/..../0.0/.../..         28 ENE AERO 26 ENE RMY N/A 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/.../..         28 NE  AERO 28 NE  RMY 30 04/02  46/35/41/0/.../0.0/.../..           39 NW  AER0 40 NW  RMY 41 04/03  42/38/40/-2/..../0.0/.../..         48 NE  AERO 53 NE  RMY 49 01/04  46/36/41/-1/..../0.0/.../..         38 NE  AERO 38 NE  RMY N/A 04/05 The low since midnight is 36F, daily normal minimum is 34F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR APRIL 5 HIGH 81 IN 1928 LOW 15 IN 1995 PRECIP 2.15 IN. IN 1987 SNOWFALL 4.0 IN. IN 1898 PEAK GUST 76 MPH WNW IN 1963 RECORDS FOR APRIL 6 HIGH 82 IN 1921 LOW 16 IN 1982 PRE 1.72 INS IN 1886 SNOW 12.3 INS IN 1982 WIND 71e MPH WNW IN 1940 TODAY'S REPORT PREPARED BY: Benjamin Turner