BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, FEBRUARY 20, 2017   ALL TIMES ARE IN EASTERN STANDARD TIME MOSTLY CLEAR SKIES AND COOLER TEMPS TO END HOLIDAY WEEKEND Yesterday finished with a max. temp. of 58F and a min. temp. of 42F making the day 21F above normal.  While temps. remain warmer than average today, they have been cooler than previous days and have only reached 42F by 1:00PM.  Gusty NNW winds have made the day feel even chillier. Conditions are drier today with dew points falling unto the upper teens.  The dry conditions have allowed for few cumulus all day and great visibility at 70 miles. Today's Observations: 7 A.M. Weather: Few cumulus in all directions Temperature: 35F; Dew Point: 24F; Wind: NW at 8 kts Sea-level pressure: 30.08 ins. Hg, rising, then more quickly Visibility: 70 miles 6-hr Max temp: 42F 6-hr Min temp: 35F 24-hr precip: 0.00 in. 24-hr snowfall: 0.0 in. BHO SA 1155 CLR 70 186/35/24/3208/008/ FEW CU ALQDS/ 8/100 4/006 53038 10042 20035 10 A.M. Weather: Few cumulus in all directions, few altocumulus N-SE Temperature: 39F; Dew Point: 21F; Wind: NNW at 8G18 kts Sea-level pressure: 30.14 ins. Hg, rising then falling Visibility: 70 miles BHO SA 1455 CLR 70 207/39/21/3308G18/014/ FEW CU ALQDS FEW AC N-SE/ 8/160 51021 1 P.M. Weather: Few cumulus in all directions Temperature: 41F; Dew Point: 18F; Wind: NNW at 13G17 kts Sea-level pressure: 30.15 ins. Hg, steady then falling Visibility: 70 miles BHO SA 1755 CLR 70 210/41/18/3313G17/015/ FEW CU ALQDS/ 8/100 4/005 51003 10042 20035 SUMMARY FOR SUNDAY, FEBRUARY 19, 2017   TEMPERATURE (DEGREES F) MAX.....58   NORMAL.....38 MIN.....42   NORMAL.....20 MEAN....50   NORMAL.....29 DEPARTURE FROM 30-YEAR NORMAL........................+21 TOTAL DEPARTURE FOR THE MONTH........................+47 [+2.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............15   DEPARTURE.........-21 TOTAL HEATING UNITS FOR THE MONTH.............672   DEPARTURE.........-49 TOTAL HEATING UNITS FOR THE SEASON...........3699   DEPARTURE........-552 TOTAL HEATING UNITS LAST SEASON TO DATE......3443   DIFFERENCE.......+256 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................32 W   AT 2:43 P.M.   AERO........................33 W   AT 2:44 P.M.                     ASOS........................35 W   AT 2:43 P.M.                    DAVIS.......................32 WNW AT 2:42 P.M. RMY 32 FASTEST MILE FOR YESTERDAY.....................22 W   AT 2:43 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................23 W   AT 2:44 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................23 W   AT 3:27 P.M. AVERAGE WIND SPEED AND DIRECTION.............14.3 WSW                    ASOS......................13.5                    DAVIS.....................12.9 WNW [290 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..........3.63  DEPARTURE......+0.97                          ASOS................NA TOTAL PRECIPITATION FOR THE YEAR...........9.13  DEPARTURE......+2.12                          ASOS................NA SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH...............31.5  DEPARTURE......+22.1 TOTAL SNOWFALL FOR THE SEASON..............52.3  DEPARTURE.......+9.8 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 2/1   40/25/33/+7/0.03/0.4/228/38           43 W   AERO 44 W   RMY 47 2/2   38/25/32/+6/T/T/265/44                36 WNW AERO 37 WNW RMY 36 2/3   30/19/25/-1/0.00/0.0/351/58           28 WNW AERO 29 WNW RMY 31 2/4   31/15/23/-3/0.00/0.0/590/97           31 WNW AERO 30 WNW RMY N/A 2/5   43/22/33/+7/0.00/0.0/092/15           38 SSW AERO 41 SSW RMY N/A 2/6   37/28/33/+7/0.00/0.0/503/82           41 WNW AERO 41 WNW RMY 43 2/7   37/30/34/+7/0.54/0.7/000/00           32 ENE AERO 31 ENE RMY 32 2/8   49/25/37/+10/T/0.0/136/22             25 W   AERO 25 W   RMY 31 2/9   35/8/22/-5/1.60/16.9/000/00           54 NNE AERO 53 NNE RMY 54 2/10  24/7/16/-11/T/T/623/100               43 WNW AERO 50 WNW RMY 48 2/11  27/15/21/-6/0.14/2.9/000/00           21 SE  AERO 20 SE  RMY 19 2/12  32/17/25/-2/0.71/5.6/000/00           22 ENE AERO 28 ENE RMY N/A 2/13  32/20/26/-2/0.27/2.2/032/05           48 NW  AERO 60 NW  RMY 61 2/14  35/16/26/-2/0.00/0.0/.../..           23 NW  AERO 24 NW  RMY 24   2/15  40/25/33/+5/..../.../.../..           31 SE  AERO 33 NW  RMY N/A 2/16  33/23/28/0/..../.../.../..            38 WNW AERO 38 WNW RMY 40 2/17  38/19/29/+1/0.00/0.0/.../..           36 WNW AER0 35 WNW RMY 35 2/18  50/24/37/+8/0.00/0.0/.../..           31 SSW AERO 33 SSW RMY 34 2/19  58/42/50/+21/0.00/0.0/.../..          32 W   AERO 33 W   RMY 32 2/20  Low temp since midnight is 35F; normal low is now 20F DAILY RECORDS FOR FEBRUARY 2017 2/09/17: NEW DAILY RECORD MAXIMUM SNOWFALL OF 16.9 INS.           PREVIOUS RECORD WAS 14.0 INS. SET IN 2015  DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR FEBRUARY 20 HIGH 66F IN 1930 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 62F IN 1930 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: Cecilia Borries-Strigle