BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, FEBRUARY 20, 2021 ALL TIMES ARE IN EASTERN STANDARD TIME SUNRISE: 0634E SUNSET: 1723E OVERCAST WITH VERY LIGHT SNOW LEADS TO SUNSHINE IN THE EARLY AFTERNOON HOURS.... Snow was the main feature yesterday and the day before, leaving us with an event total of 9.9 inches!! That puts us 29.5 inches above normal on the month and 29.8 inches above normal on the year. Melted snowfall at 7 A.M. was measured to be 0.57 inches, making us 2.58 inches higher than average on the month and a half inch higher on the year. Light snow continued through this morning into the early afternoon, only leaving a trace. The sun has since broke out of the clouds in rapid fashion, bringing with it a better visibility of 75 miles. The high so far today is 30F, 8 degrees below the daily average max of 38F. The low since midnight is 22F, 2 degrees above the daily average low of 20F. Today's Observations: 7 A.M. Weather: Overcast stratocumulus, snow ending at 6:50 A.M. Temperature: 23F; Dew Point: 21F; Relative Humidity: 92% Wind: NW @ 7 kts Sea-level pressure: 29.97 in Hg; falling, then rising Visibility: 30 miles, except 20 miles NNW-SE 6-hr Max temp: 24F 6-hr Min temp: 22F 24-hr Precip: 0.57 ins. 24-hr Snow: 7.9 ins. Snow Depth: 18 ins. BHO SA 1155 30 OVC 30 148/23/21/3207/997/ VSBY NNW-SE 20 MI S-E50 NEW SNW PST 24 HRS 7.9 INS/ 8/6// 4/018 70057 50004 10024 20022 10 A.M. Weather: Broken stratocumulus, very light snow Temperature: 28F; Dew Point: 23F; Relative Humidity: 83% Wind: NW @ 9G17 kts Sea-level pressure: 29.96 in Hg; falling steadily Visibility: 35 miles 3-hr Precip: Trace 3-hr Snow: Trace BHO SA 1455 30 BKN 35 144/28/23/3209G17/996/ S-B10 PCPN VRY LGT NEW SNW PST 3 HRS TRACE/ 8/800 600// 58004 1 P.M. Weather: Overcast stratocumulus, very light snow Temperature: 28F, Dew point: 21F; Relative Humidity: 74% Wind: WNW @ 9 kts Sea-level pressure: 29.96 in Hg, falling then rising Visibility: 65 miles 6-hr Max temp: 30F 6-hr Min temp: 23F 6-hr Precip: Trace 6-hr Snow: Trace Snow Depth: 18 ins. BHO SA 1755 30 OVC 65 146/28/21/3009/996/ S-CTD PCPN VRY LGT NEW SNW PST 6 HRS TRACE/ 8/8// 4/018 600// 50002 10030 20023 SUMMARY FOR FRIDAY, FEBRUARY 19, 2021 TEMPERATURE (DEGREES F) MAX.......30 NORMAL.....38 MIN.......24 NORMAL.....20 MEAN......27 NORMAL.....29 DEPARTURE FROM 30-YEAR (1981-2010) NORMAL...... -2 TOTAL DEPARTURE FOR THE MONTH...................+1 [-0.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............38 DEPARTURE.......+2 TOTAL HEATING UNITS FOR THE MONTH..............718 DEPARTURE.......-3 TOTAL HEATING UNITS FOR THE SEASON............3762 DEPARTURE.....-489 TOTAL HEATING UNITS LAST SEASON TO DATE.......3843 DEPARTURE......-81 PEAK WIND GUST (MPH): 420C/Official..............24 NE @ 3:23 A.M. AEROVANE (south tower).....23 NE @ 3:24 A.M. ASOS.......................23 NE @ 3:24 A.M. DAVIS #1...................24 ENE @ 3:23 A.M. DAVIS #2 (south tower).....23 ENE @ 3:09 A.M. RMY........................24 @ 3:36 A.M. VECTOR.....................24 @ 3:36 A.M. MERLIN.....................21 FASTEST MILE: CONTACTING ANEMOMETER/OFFICIAL..................16 NE @ 2:34 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................16 ENE @ 1:03 A.M. MAXIMUM 2-MINUTE DAVIS #1 AVERAGE...............16 ENE @ 1:03 A.M. MAXIMUM 2-MINUTE DAVIS #2 AVERAGE...............16 NE @ 2:34 A.M. MAXIMUM 2-MINUTE RMY AVERAGE....................15 ENE @ 2:31 A.M. MAXIMUM 2-MINUTE VECTOR AVERAGE.................16 @ 1:00 A.M. AVERAGE WIND SPEED AND DIRECTION: CONTACTING/OFFICIAL...... 8.9 NNE [293 total miles] ASOS......................9.6 DAVIS #1..................9.2 NE DAVIS #2..................9.2 NE RMY.......................9.0 ENE VECTOR....................9.3 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST): TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.......0.57 DEPARTURE....+0.42 ASOS.............0.54 TOTAL PRECIPITATION FOR THE MONTH.............5.24 DEPARTURE....+2.58 ASOS.............5.42 TOTAL PRECIPITATION FOR THE YEAR..............7.56 DEPARTURE....+0.55 ASOS............7.77 SNOWFALL (INCHES) THROUGH THIS MORNING (EST): TOTAL SNOWFALL 24 HOURS ENDING 7 A.M...........7.9 DEPARTURE.... +7.4 TOTAL SNOWFALL FOR THE MONTH..................38.9 DEPARTURE....+29.5 TOTAL SNOWFALL FOR THE SEASON.................72.3 DEPARTURE....+29.8 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 02/01 32/21/27/+1/1.86/12.7/000/00 53 NE AERO 65 NE RMY 62 02/02 34/29/32/+6/0.91/1.6/000/00 52 NNE AERO 55 NE RMY 58 02/03 34/26/30/+4/0.01/0.2/036/06 20 NW AERO 20 NW RMY 22 02/04 37/26/32/+6/0.02/0.7/158/26 23 NW AERO 22 NW RMY M 02/05 39/26/33/+7/0.01/T/000/00 33 S AERO 32 S RMY 30 02/06 40/28/34/+8/0.00/0.0/595/97 42 WSW AERO 41 WSW RMY 47 02/07 35/25/30/+3/0.71/11.6/000/00 27 WNW AERO 28 WNW RMY 30 02/08 27/13/20/-7/0.00/0.0/619/100 29 NW AERO 31 WNW RMY 32 02/09 27/18/23/-4/0.17/2.2/000/00 16 N AERO 16 N RMY 17 02/10 31/15/23/-4/0.00/0.0/.../.. 26 WNW AERO 25 WNW RMY 28 02/11 31/15/23/-4/0.00/0.0/.../.. 28 NW AERO 26 NW RMY 31 02/12 25/8/17/-10/0.00/0.0/.../.. 32 NW AERO 35 NW RMY 36 02/13 27/15/21/-7/0.00/0.0/.../.. 20 NNW AERO 20 NNW RMY 23 02/14 34/24/29/+1/0.00/0.0/.../.. 19 ENE AERO 16 ENE RMY 19 02/15 31/27/29/+1/0.11/0.0/.../.. 21 NNE AERO 21 NNE RMY 22 02/16 44/29/37/+9/0.63/0.0/.../.. 39 W AERO 41 W RMY 43 02/17 30/19/25/-3/0.00/0.0/.../.. 40 W AERO 41 WNW RMY 40 02/18 29/21/25/-4/.../.../.../.. 24 ENE AERO 24 ENE RMY 25 02/19 30/24/27/-2/0.00/0.0/.../.. 24 NE AERO 23 NE RMY 24 02/20 The low since midnight is 22F, the daily normal low is 20F DAILY RECORDS 02/01 -RECORD SNOWFALL OF 12.7 INS, BREAKING PREVIOUS RECORD OF 11.0 INS SET IN 1898 02/01 -RECORD PRECIPITATION OF 1.86 INS, BREAKING PREVIOUS RECORD OF 1.30 INS SET IN 1898 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