BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, APRIL 3, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME A WET, COOL, WINDY DAY... A fairly bleak Friday atop the hill. Temperatures have hovered in the low-40s for much of the day with a busy north-northeast wind peaking so far at 51 MPH. Rain fell during the overnight hours yielding 1.07 ins of needed precipitation by 7AM. It has persisted throughout the day tacking on another 0.50 ins by 1 PM.  Visibility has remained 1/2 mile or less at any time.       Our high temperature so far today is 42F, which is 9 degrees below our daily normal high temperature of 51F. The low since midnight is 38F, which is 5 degrees above the daily normal low of 33F. 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: Vertical visibility 300 ft, sky obscured, moderate rain Temperature: 42F; Dew Point: 42F; Relative Humidity: 100% Wind: N at 15G27 kts Peak wind: 32 MPH (27 kts) N at 6:20 A.M. Sea-level pressure: 29.49 ins. Hg: rising, then rising more rapidly Visibility: 1/2 mile, fog 6-hr Max temp: 42F 6-hr Min temp: 38F 24-hr Precip:  1.07 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 X W3 1/2RF 988/42/42/3515G27/949/ RCTD PK WND 3527/20/ 8//// 53019 70107 10042 20038 10 A.M. Weather: Vertical visibility 300 ft, sky obscured, light rain Temperature: 42F; Dew Point: 42F; Relative Humidity: 100% Wind: NNE at 22G35 kts Peak Wind: 43 MPH (37 kts) NNE at 8:38 A.M. Sea-level pressure: 29.56 ins. Hg: rising, then rising more rapidly Visibility: 1/4 mile, fog 3-hr Precip:  0.27 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 X W3 1/4R-F 001/42/42/0322G35/956/ R-CTD PK WND 0337/1338/ 8//// 60027 53022 1 P.M. Weather: Vertical visibility 300 ft, sky obscured, light rain Temperature: 42F; Dew Point: 42F; Relative Humidity: 100% Wind: NNE at 15G35 kts, Peak Wind: 51 MPH (44 kts) NNE at 11:39 A.M. Sea-level pressure: 29.62 ins. Hg: rising, then rising more rapidly Visibility: 1/8 miles, fog 6-hr Max temp: 42F 6-hr Min temp: 42F 6-hr Precip:  0.50 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 X W3 1/8R-F 032/42/42/0215G35/962/ R-CTD PK WND 0244/1639/ 8//// 6050 53022 10042 20042 SUMMARY FOR THURSDAY, APRIL 2, 2020 TEMPERATURE (DEGREES F) MAX.....46   NORMAL.....50 MIN.....35   NORMAL.....33 MEAN....41   NORMAL.....41 DEPARTURE FROM 30-YEAR NORMAL..................+/-0 TOTAL DEPARTURE FOR THE MONTH....................-6 [-3.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............24  DEPARTURE......+/-0 TOTAL HEATING UNITS FOR THE MONTH...............54  DEPARTURE........+6 TOTAL HEATING UNITS FOR THE SEASON............4927  DEPARTURE......-605 TOTAL HEATING UNITS LAST SEASON TO DATE.......5458  DEPARTURE......-531 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................39 NW  AT  2:55 P.M.                      AERO.........................40 NW  AT  2:34 P.M                     ASOS.........................40 NW  AT  2:54 P.M.                    DAVIS........................39 NW  AT  4:06 P.M. RMY 41 FASTEST MILE FOR YESTERDAY......................28 NW  AT  1:51 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................26 NW  AT  2:55 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................28 NW  AT  1:51 P.M. AVERAGE WIND SPEED AND DIRECTION..............17.3 NW                                  ASOS.......................16.7                    DAVIS......................16.9 NW [326 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....1.07  DEPARTURE......+0.90                          ASOS..............1.01 TOTAL PRECIPITATION FOR THE MONTH..........1.12  DEPARTURE......+0.78                          ASOS..............1.05 TOTAL PRECIPITATION FOR THE YEAR..........10.45  DEPARTURE......-3.89                          ASOS.............10.78 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.......-0.4 TOTAL SNOWFALL FOR THE SEASON..............27.6  DEPARTURE......-32.5 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 The low since midnight is 38F, daily normal minimum is 33F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR APRIL 3 HIGH 76 IN 1892 LOW 16 IN 1894 PRECIP 2.18 IN. IN 1990 SNOWFALL 8.0 IN. IN 1915 PEAK GUST 83e MPH NW IN 1977 [RECORD FOR MONTH] RECORDS FOR APRIL 4 HIGH 76 IN 2010 LOW 12 IN 1954 PRECIP 1.45 IN. IN 1987 SNOWFALL 7.3 IN. IN 2016 PEAK GUST 80 MPH WNW IN 1963 TODAY'S REPORT PREPARED BY: Andrew Swanson