BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, MARCH 1, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME A FAIR WEATHER DAY WITH LIGHT AND  VARIABLE WINDS ATOP GREAT BLUE HILL.... We measured a trace of snow and 0.02 inches of liquid from yesterday's light snow following  the 7 A.M. observation. The snow total for  February is 12.1 inches, 1.8 inches under the  normal total for the month. The snow total so  far this season is 24.5 inches, which is 22.5 inches below normal.  Today we observed light and variable winds, and a notably low max gust of 12 mph since 7 A.M.  The overcast seen this morning broke up around 8  A.M., revealing a distant cirrostratus layer along  the horizon. Snow depth has decreased from 2 to 1  inches since this morning due to constant sunlight  before and following the 10 A.M. observation.  The high temperature so far today is 36F, 4 degrees  below the normal daily maximum of 40F. The low since  midnight is 17F, 5 degrees below the normal minimum  of 22F.     PRELIMINARY STATS FOR FEBRUARY 2019 TEMPERATURE, Deg. F Avg. Max. 37.3 [+0.5] Avg. Min. 21.6 [-2.5] Mean      29.5 [+1.6] 24-hour corrected mean: 29.2 Max. for month: 62F on the 5th Min. for month: 5F  on the 1st HEATING DEGREE DAYS Total heating units:    990 [-47] Total for the season:  4486 [-82] Total for last season: 4122 PRECIPITATION, Inches Total: 3.61 [-0.46] Greatest in 24 hrs: N/A SNOWFALL, Inches Total: 12.1 [-1.8] Greatest in 24 hrs: N/A  WIND, mph Avg. uncorrected wind speed: 12.9 Avg. corrected wind speed: 13.3 Prevailing wind direction: WNW at 22% Peak gust and direction: 66 W on 25th   SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes:   N/A Today's Observations: 7 A.M. Weather: Overcast altostratus Temperature: 19F; Dew Point: 5F; Wind: W at 3 kts, Wind: Light and variable Sea-level pressure: 30.36 ins. Hg, rising steadily Visibility: 75 miles 6-hr Max temp: 20F 6-hr Min temp: 17F 24-hr Precip:  0.02 ins. 24-hr snowfall: Trace Snow depth: 2 ins.  BHO SA 1155 E80 OVC 75 282/19/5/2803/036/ SUN DMLY VSBL  WND L/V/ 8/01/ 4/002 70002 53015 10020 20017  10 A.M. Weather: Scattered cirrostratus Temperature: 28F; Dew Point: 7F; Wind: W at 3 kts, Wind: Light and variable  Sea-level pressure: 30.39 ins. Hg, falling then rising Visibility: 70 miles, thin smoke layer in all directions 3-hr Precip: 0.00 ins.  BHO SA 1455 250 SCT 70 290/28/7/2803/039/ THN K LYR ALQDS  WND L/V/ 8/005 50008   1 P.M. Weather: Scattered cirrostratus, few cumulus Temperature: 35F; Dew Point: 12F; Wind: S at 3 kts, Wind: Light and variable  Sea-level pressure: 30.34 ins. Hg, falling steadily Visibility: 70 miles 6-hr Max temp: 36F 6-hr Min temp: 18F 6-hr Precip:  0.00 ins. 6-hr snowfall: 0.0 ins. Snow depth: 1 in.  BHO SA 1755 250 SCT 70 274/35/12/1903/034/ FEW CU ALQDS WND  L/V/ 8/105 4/001 58016 10036 20018 SUMMARY FOR THURSDAY, FEBRUARY 28, 2019  TEMPERATURE (DEGREES F) MAX.....28   NORMAL.....40 MIN.....15   NORMAL.....22 MEAN....22   NORMAL.....31 DEPARTURE FROM 30-YEAR NORMAL........................-9 TOTAL DEPARTURE FOR THE MONTH.......................+45 [+1.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............43   DEPARTURE.........+9 TOTAL HEATING UNITS FOR THE MONTH.............990   DEPARTURE........-47 TOTAL HEATING UNITS FOR THE SEASON...........4486   DEPARTURE........-82 TOTAL HEATING UNITS LAST SEASON TO DATE......4122   DIFFERENCE......+364 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................22 NW  AT  2:33 P.M.                    AERO.........................18 NW  AT  2:30 P.M.                    ASOS.........................22 NNW AT  2:34 P.M.                     DAVIS........................21 W   AT  2:33 P.M. RMY 22 FASTEST MILE FOR YESTERDAY......................15 NW  AT  3:00 P.M.  MAXIMUM 2-MINUTE ASOS AVERAGE...................16 NW  AT  2:59 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................16 W   AT  2:59 P.M. AVERAGE WIND SPEED AND DIRECTION...............7.0 NNW                    ASOS........................7.5                    DAVIS.......................7.4 NNW [301 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.02  DEPARTURE.......-0.15                          ASOS..............0.02 TOTAL PRECIPITATION FOR THE MONTH..........3.61  DEPARTURE.......-0.46                          ASOS..............3.59 TOTAL PRECIPITATION FOR THE YEAR...........8.96  DEPARTURE.......+0.54                          ASOS..............9.07 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M............T  DEPARTURE........+3.0 TOTAL SNOWFALL FOR THE MONTH...............12.1  DEPARTURE........-1.8 TOTAL SNOWFALL FOR THE SEASON..............24.5  DEPARTURE.......-22.5 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 19/5/12/-14/0.00/0.0/552/95          29 W   AERO 28 W   RMY N/A 02/02 30/7/19/-7/0.00/0.0/318/55           32 WSW AERO 32 WSW RMY 31 02/03 38/27/33/+7/0.00/0.0/126/22          26 S   AERO 25 S   RMY N/A 02/04 59/33/46/+20/0.00/0.0/540/93         25 SSW AERO 28 SSW RMY N/A 02/05 62/39/51/+25/0.00/0.0/354/60         30 WNW AERO 29 WNW RMY 32 02/06 39/28/34/+8/..../.../396/67          24 NNW AERO 23 NNW RMY N/A 02/07 37/31/34/+7/..../.../000/00          28 ENE AERO 24 ENE RMY 28 02/08 51/27/39/+12/..../.../204/34         46 W   AERO 46 WNW RMY 51 02/09 32/20/26/-1/0.00/0.0/594/100         50 WNW AERO 52 WNW RMY 52 02/10 33/18/26/-1/0.00/0.0/510/85          24 WNW AERO 23 WNW RMY 25 02/11 34/21/28/+1/0.00/0.0/318/53          24 NNW AERO 23 NNW RMY 25 02/12 33/13/23/-4/..../2.8/000/00          32 E   AERO 30 E   RMY 26 02/13 39/29/34/+6/..../0.1/018/03          36 W   AERO 32 W   RMY 36 02/14 37/26/32/+4/0.00/0.0/594/97          44 WNW AERO 42 WNW RMY 45 02/15 49/29/39/+11/0.11/0.0/060/10         40 S   AERO 40 S   RMY 44 02/16 44/26/35/+7/0.00/0.0/504/82          25 NW  AERO 25 NW  RMY N/A 02/17 37/19/28/0/..../.../618/100          30 NNW AERO 25 NNW RMY N/A 02/18 30/16/23/-6/..../.../000/00          35 NW  AERO 36 NW  RMY 41 02/19 30/10/20/-9/0.00/0.0/618/99          35 NW  AERO 33 NW  RMY N/A 02/20 26/12/19/-10/..../.../000/00         16 WNW AERO 14 SSW RMY N/A 02/21 43/21/32/+3/..../.../294/47          36 W   AERO 33 W   RMY 38 02/22 43/30/37/+8/..../0.0/504/80          22 NW  AERO 21 NW  RMY 23 02/23 38/24/31/+1/0.00/0.0/336/53          18 NNW AERO 16 NNW RMY N/A 02/24 45/30/38/+8/..../.../000/00          41 W   AERO 37 W   RMY 47 02/25 37/25/31/+1/..../.../.../..          66 W   AERO 59 W   RMY M  02/26 29/14/22/-8/0.00/0.0/.../..          46 WNW AERO 39 WNW RMY 47 02/27 22/9/16/-15/..../.../.../..          35 WNW AERO 26 WNW RMY N/A 02/28 28/15/22/-9/..../.../.../..          22 NW  AERO 18 NW  RMY 22 03/01 Low temp since midnight is 15F; normal low is 22F   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MARCH 1 HIGH 62 IN 1972 LOW -3 IN 1886 PRECIP 1.65 INS. IN 1900 SNOWFALL 9.4 INS. IN 1949 PEAK GUST 78 WSW IN 1966 RECORDS FOR MARCH 2 HIGH 63 IN 2004 LOW -3 IN 1886 PRE 3.47 INS. IN 2018 SNOW 8.2 INS. IN 2009 WIND 75 MPH NW IN 1966 TODAY'S REPORT PREPARED BY: Benjamin Turner