BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, FEBRUARY 20, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME INCREASING CLOUDS WITH EXCELLENT VISIBILITY AND DRY CONDITIONS.... The partly cloudy skies of this morning began to fill in around noontime, consisting of fair weather cumulus and a cirrostratus layer. Winds are light and westerly, with an average speed not exceeding 10 mph. However, there was a gust of wind around 25 mph between 10 A.M. and 11 A.M. Visibility was excellent yet again, it being 85 miles for the majority of the day.   The high so far today is 31F degrees, this is 7 degrees below the normal of 38F. The low since midnight is 18F, 2 degrees below the normal daily minimum of 20F. Today's Observations: 7 A.M. Weather: Scattered cirrostratus, few cumulus offshore Temperature: 18F; Dew Point: 10F; Wind: NW at 5 kts, Wind: Light Relative Humidity: 70% Sea-level pressure: 30.41 ins. Hg: rising steadily Visibility: 80 miles 6-hr Max temp: 24F 6-hr Min temp: 18F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. BHO SA 1155 250 SCT 80 299/18/10/3105/041/ FEW CU OFFSHR WND LGT/ 8/105 52021 10024 20018 10 A.M. Weather: Scattered cumulus, scattered cirrostratus Temperature: 27F; Dew Point: 6F; Wind: NW at 5 kts, Wind: Light Relative Humidity: 41% Sea-level pressure: 30.43 ins. Hg: falling then rising Visibility: 85 miles 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 40 SCT 250 SCT 85 306/27/6/3105/043/ WND LGT/ 8/105 50007 1 P.M. Weather: Scattered cumulus, broken cirrostratus Temperature: 31F; Dew Point: 9F; Wind: W at 10G23 kts Relative Humidity: 40% Sea-level pressure: 30.35 ins. Hg: steady Visibility: 80 miles 6-hr Max temp: 31F 6-hr Min temp: 18F 6-hr Precip:  0.00 ins. 6-hr Snowfall: 0.0 ins. BHO SA 1755 40 SCT E250 BKN 80 281/31/9/2710G23/035/ 8/108 58025 10031 20018 SUMMARY FOR WEDNESDAY, FEBRUARY 19, 2020 TEMPERATURE (DEGREES F) MAX.....42   NORMAL.....37 MIN.....25   NORMAL.....20 MEAN....34   NORMAL.....29 DEPARTURE FROM 30-YEAR NORMAL................... +5 TOTAL DEPARTURE FOR THE MONTH...................+105 [+5.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............31  DEPARTURE....... -5 TOTAL HEATING UNITS FOR THE MONTH..............614  DEPARTURE......-107 TOTAL HEATING UNITS FOR THE SEASON............3843  DEPARTURE......-408 TOTAL HEATING UNITS LAST SEASON TO DATE.......4148  DEPARTURE......-305 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................45 W   AT 12:12 P.M.                      AERO.........................46 W   AT 12:14 P.M.                      ASOS.........................45 W   AT 12:13 P.M.                    DAVIS........................46 W   AT 12:12 P.M. RMY 44 FASTEST MILE FOR YESTERDAY......................34 W   AT 12:14 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................32 W   AT 12:14 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................35 W   AT 12:44 P.M. AVERAGE WIND SPEED AND DIRECTION.............16.6 W                                   ASOS......................16.3                    DAVIS.....................16.9 WNW [287 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......+0.15                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.20  DEPARTURE......-0.46                          ASOS..............2.30 TOTAL PRECIPITATION FOR THE YEAR...........3.66  DEPARTURE......-3.35                          ASOS..............3.84 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH................0.6  DEPARTURE.......-8.8 TOTAL SNOWFALL FOR THE SEASON..............24.8  DEPARTURE......-17.7 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 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 02/01  38/30/34/+8/0.01/T/..../..          14 WSW AERO 14 WSW RMY N/A 02/02  40/30/35/+9/0.00/0.0/..../..        18 W   AERO 18 WNW RMY 18 02/03  44/27/36/+10/0.00/0.0/..../..       28 W   AERO 28 W   RMY 28 02/04  44/33/39/+13/0.00/0.0/..../..       19 E   AERO 16 E   RMY 18 02/05  41/30/36/+10/0.00/0.0/..../..       20 NNW AERO 19 NNW RMY N/A 02/06  31/30/34/+8/0.00/0.0/..../..        29 E   AERO 28 E   RMY 27 02/07  53/25/39/+12/..../0.1/..../..       71 WSW AERO 71 SSW RMY 73 02/08  33/20/27/0/T/T/..../..              46 W   AERO 44 W   RMY 44 02/09  33/15/24/-3/T/T/..../..             30 SSE AERO 29 SSE RMY N/A 02/10  42/33/38/+11/..../0.0/..../..       39 SSW AERO 39 SSW RMY 39 02/11  40/36/38/+11/..../0.0/..../..       24 W   AERO 23 W   RMY N/A 02/12  41/30/36/+9/0.00/0.0/..../..        37 W   AERO 36 W   RMY N/A 02/13  35/31/34/+6/.00/0.0/..../..         29 SSW AERO 29 SSW RMY N/A 02/14  33/8/21/-7/0.00/0.0/..../..         32 WNW AERO 32 NW  RMY 34 02/15  27/4/16/-12/0.00/0.0/..../..        31 SSW AERO 31 SSW RMY N/A 02/16  40/23/32/+4/0.00/0.0/..../..        38 SW  AERO 38 SW  RMY N/A 02/17  44/28/36/+8/0.00/0.0/..../..        25 WNW AERO 24 WNW RMY 24 02/18  37/27/32/+3/0.31/T/..../..          26 SE  AERO 26 SE  RMY N/A 02/19  42/25/34/+5/0.00/0.0/.../..         45 W   AERO 46 W   RMY 44 02/20 The low since midnight is 18F, daily normal minimum is 20F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR FEBRUARY 20 HIGH 68F IN 2018 LOW -4F IN 1966 PRECIP 1.90 INCHES IN 1934 SNOWFALL 15.0 INCHES IN 1921,1934 PEAK GUST 78 MPH NW IN 1972 RECORDS FOR FEBRUARY 21 HIGH 70F IN 2018 LOW -6F IN 1950 PRECIP 2.42 INCHES IN 1898 SNOWFALL 9.0 INCHES IN 1929 PEAK GUST 72 MPH WNW IN 1967 TODAY'S REPORT PREPARED BY: Benjamin Turner and Ann Murphy