BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, FEBRUARY 20, 2016 ALL TIMES ARE IN EASTERN STANDARD TIME CLOUDS AND SHOWERS GIVE WAY TO WARMTH AND SUN The precipitation overnight, which left a trace of snow on Friday evening and a hundredth of an inch of rain early today, ended very early this morning and has left us with a clearing sky and improving visibility. Temps at midnight started an above normal temperature of 31F and have climbed throughout the day as clouds gave way to blue skies. By today's 1:00 PM EST observation, skies had mostly cleared with only scattered altostratus and altocumulus along with scattered thin cirrus remaining. Tmeperatures had climbed into the mid 50's as conditions turned very dry. Gusty winds which began late last night, have continued throughout the day with winds gusting as high as 40 mph and still gusting into the mid 20s. Today's Observations: 7 A.M. Weather: Broken Stratus and stratocumulus, thin overcast nimbostratus, few cumulus fractus WSW-NW, Few Stratocumulus distant offshore ESE-SSE Temperature: 41F; Dew Point: 37F; Wind: S at 20G31 kts, Peak Wind: 35 kts, S at 6:36 A.M. Sea-level pressure: 29.95 ins. Hg, decresing unsteadily Visibility: 25 miles, except 15 NW-NE, 35 NE-SE 6-hr Max temp: 41F 6-hr Min temp: 31F 24-hr precip: 0.01 ins. 24-hr snowfall: Trace BHO SA 1155 E65 BKN 75 OVC 25 146/41/37/1920G31/995/ FEW CUFRA WSW-NW FEW SC DSNT OFFSHR ESE-SSE THN SPTS IOVC OVHD VSBY 15 NW-NE 35 NE-SE HAZY PK WND 1835/36/ 8/72/ 57033 10041 20031 10 A.M. Weather: Broken Altocumulus, hazy Temperature: 43F; Dew Point: 35F; Wind: S at 18 kts Sea-level pressure: 29.90 ins. Hg, steady then decreasing Visibility: 35 miles, except 25 miles NNE-E BHO SA 1455 E75 BKN 35 125/43/35/2018/990/ VSBY 25 NNE-E HAZY/ 8/02/ 58021 1 P.M. Weather: Scattered altostratus and altocumulus and thin scattered cirrus, clear band along horizon W Temperature: 55F; Dew Point: 32F; Wind: SW at 18 kts Sea-level pressure: 29.83 ins. Hg, steady, then falling Visibility: 70 miles, except 30 miles SE-SSW 6-hr Max temp: 55F 6-hr Min temp: 41F BHO SA 1755 80 SCT 170 SCT 70 101/55/32/2218G23/983/ VSBY 30 SE-SSW CLR BND ALNG HRZN W/ 8/034 58024 10055 20041 SUMMARY FOR FRIDAY, FEBRUARY 19, 2016 TEMPERATURE (DEGREES F) MAX.....39 NORMAL.....37 MIN.....16 NORMAL.....20 MEAN....28 NORMAL.....29 DEPARTURE FROM 30-YEAR NORMAL.........................-1 TOTAL DEPARTURE FOR THE MONTH........................+18 [+0.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............37 DEPARTURE..........+2 TOTAL HEATING UNITS FOR THE MONTH.............701 DEPARTURE.........-20 TOTAL HEATING UNITS FOR THE SEASON...........3443 DEPARTURE........-808 TOTAL HEATING UNITS LAST SEASON TO DATE......4278 DIFFERENCE.......-835 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................24 SSW AT 11:44 P.M. ASOS........................26 S AT 7:18 P.M. DAVIS.......................25 S AT 12:40 P.M. RMY N/A FASTEST MILE FOR YESTERDAY.....................18 SSE AT 11:48 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................18 S AT 10:46 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................18 S AT 7:18 P.M. AVERAGE WIND SPEED AND DIRECTION...............9.4 S ASOS........................9.8 DAVIS.......................8.5 SSW [208 Deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01 DEPARTURE......-0.14 ASOS..............0.02 TOTAL PRECIPITATION FOR THE MONTH..........4.09 DEPARTURE......+1.43 ASOS..............4.33 TOTAL PRECIPITATION FOR THE YEAR...........7.86 DEPARTURE......+0.85 ASOS..............8.27 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........Trace DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH...............22.5 DEPARTURE......+13.6 TOTAL SNOWFALL FOR THE SEASON..............38.1 DEPARTURE.......-3.9 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY CALENDAR DAY DATA DATE: MAX/MIN/MEAN/DEP/PRECIP/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 2/1 64/40/52/+26/0.00/0.0/.../.. 36 WNW AERO 37 W RMY 34 2/2 48/31/40/+14/0.00/0.0/.../.. 23 NW AERO 23 WNW RMY N/A 2/3 55/34/45/+19/0.80/0.0/000/00 55 SSE AERO 58 SSE RMY 53 2/4 55/39/47/+21/..../0.0/000/00 37 W AERO 36 W RMY 35 2/5 39/19/29/+3/..../12.5/000/00 37 NNW AERO 39 NNW RMY 35 2/6 35/17/26/0/0.00/0.0/.../.. 25 SSW AERO 24 SSW RMY 23 2/7 43/26/35/+8/0.00/0.0/.../.. 35 ENE AERO 35 ENE RMY N/A 2/8 36/16/26/-1/..../.../000/00 53 NE AERO 55 NE RMY 53 2/9 26/17/22/-5/..../.../000/00 21 N AERO 22 N RMY N/A 2/10 33/21/27/+0/0.01/0.0/.../.. 23 W AERO 23 W RMY 21 2/11 26/7/17/-10/T/T/.../.. 39 W AERO 47 W RMY 42 2/12 23/4/13/-14/0.00/0.0/.../.. 31 WNW AERO 38 WNW RMY 21 2/13 21/-7/7/-21/0.00/0.0/.../.. 41 W AERO 46 WNW RMY 43 2/14 10/-14/-2/-30/0.00/0.0/.../.. 33 WNW AERO 46 WNW RMY N/A 2/15 32/-2/15/-13/..../1.2/.../.. 24 E AERO 28 E RMY N/A 2/16 55/32/44/+16/..../0.0/.../.. 65 SSE AERO 69 SSE RMY 64 2/17 43/30/37/+9/0.00/0.0/.../.. 33 W AERO 35 W RMY N/A 2/18 32/20/26/+3/0.00/0.0/.../.. 25 NNW AERO 29 NW RMY 25 2/19 39/16/28/-1/0.01/T/.../.. 24 SSW AERO 26 SSW RMY N/A 2/20 morning low temp. since midnight 30F; normal now 20F DAILY RECORDS FOR FEBRUARY 2016 2/14/16: **NEW DAILY RECORD LOW MINIMUM TEMPERATURE OF -14F, SURPASSING PREVIOUS RECORD OF -8F SET IN 1979** 2/14/16: **TIED DAILY RECORD LOW MAXIMUM TEMPERATURE OF 10F, MATCHING PREVIOUS RECORD OF 10F SET IN 1979** 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: Robert Millette / Mike Iacono