BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JANUARY 16, 2016 ALL TIMES ARE IN EASTERN STANDARD TIME WARMTH AND RAIN GIVE WAY TO COLD AND SNOW The rain that started very early this morning came down moderately for a time. Over an inch of rain had fallen before the precipitation mixed with and then changed over to snow and sleet. No measureable accumulation was recorded. By this afternoon's 1:00 PM EST observation skies were overcast once more after the rain and snow this morning. Temperatures and dew points had crept up from their lows and were at 35 with 100% humidity. Today's Observations: 7 A.M. Weather: Light Rain and Dense Fog Temperature: 36F; Dew Point: 36F; Wind: N at 11 kts Sea-level pressure: 29.31 ins. Hg, falling then more rapidly Visibility: 1/16 miles, Fog 6-hr Max temp: 41F 6-hr Min temp: 36F 24-hr precip: 0.50 Snow depth: Trace BHO SA 1155 W2 X 1/16R-F 927/36/36/3511/931/ 58052 60050 ASOS 70050 MANUAL 70050 10041 20036 10 A.M. Weather: Few Stratus, Overcast Nimbostratus, Moderate Rain Temperature: 37F; Dew Point: 37F; Wind: N at 13G23 kts Sea-level pressure: 29.33 ins. Hg, decreasing then rising Visibility: 1 mile Variable, 1/2 to 1 and 1/2 miles, fog 3-hr precip:0.43 BHO SA 1455 -X E3 OVC 1VRF 932/37/37/0113G23/933/ F4 STRA DRFTG OVR SMT VSBY 1/2V11/2/ 8/62/ 53005 ASOS 60044 MANUAL 60043 1 P.M. Weather: Few Stratus Fractus below the summit, overcast Altostratus Temperature: 35F; Dew Point: 35F; Wind: N at 9 kts Sea-level pressure: 29.40 ins. Hg, rising then falling Visibility: 25 miles, except 50 miles SSE-SW, 30 WSW, 20 W-NW 30 NNW, 10 N-NNE, 20 NE, 15 ENE-SSE, Vrb lgt fog all directions 6-hr Max temp: 37F 6-hr Min temp: 32F 6-hr precip:0.53 6-hr snow fall: TRACE BHO SA 1755 E9 OVC 25 956/35/35/3409/940/ FEW STFRA BLO SMT N-NE SUN BRFLY DMLY VSBL VSBY 50 SSE-SW 30 WSW 20 W-NW 30 NNW 10 N-NNE 20 NE 15 ENE-SSE/ 8/72/ 51024 ASOS 60055 MANUAL 60053 10037 20032 SUMMARY FOR FRIDAY, JANUARY 15, 2016 TEMPERATURE (DEGREES F) MAX.....40 NORMAL.....33 MIN.....23 NORMAL.....17 MEAN....32 NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL........................+7 TOTAL DEPARTURE FOR THE MONTH.......................+72 [+4.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............33 DEPARTURE..........-7 TOTAL HEATING UNITS FOR THE MONTH.............517 DEPARTURE.........-70 TOTAL HEATING UNITS FOR THE SEASON...........2173 DEPARTURE........-719 TOTAL HEATING UNITS LAST SEASON TO DATE......2691 DIFFERENCE.......-518 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................26 ESE AT 9:10 P.M. ASOS........................24 E AT 9:10 P.M. DAVIS.......................22 ESE AT 9:57 P.M. RMY 23 FASTEST MILE FOR YESTERDAY.....................19 ESE AT 9:12 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................18 E AT 9:23 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................18 ESE AT 9:59 P.M. AVERAGE WIND SPEED AND DIRECTION...............8.6 ESE ASOS........................8.9 DAVIS.......................7.8 ESE [123 Deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.50 DEPARTURE......0.35 ASOS..............0.50 TOTAL PRECIPITATION FOR THE MONTH..........2.25 DEPARTURE......0.11 ASOS..............2.37 TOTAL PRECIPITATION FOR THE YEAR...........2.25 DEPARTURE......0.11 ASOS..............2.37 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.......-0.6 TOTAL SNOWFALL FOR THE MONTH................2.6 DEPARTURE.......-5.9 TOTAL SNOWFALL FOR THE SEASON...............3.9 DEPARTURE......-20.6 PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA DATA REPORTED: 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 1/1 37/29/33/+6/0.00/0.0/005/01 29 W RMY 29 1/2 37/27/32/+5/0.00/0.0/461/84 31 W RMY N/A 1/3 41/27/34/+8/0.00/0.0/501/91 28 W RMY 29 1/4 30/10/20/-6/T/T/000/00 29 NNW RMY 29 1/5 23/4/14/-12/0.00/0.0/552/100 28 NNW RMY N/A 1/6 43/17/30/+4/0.00/0.0/553/100 24 SW RMY 24 1/7 43/25/34/+8/0.00/0.0/521/94 21 SW RMY N/A 1/8 40/28/34/+8/T/0.0/.../.. 28 E AERO 25 ENE RMY 25 1/9 39/36/38/+12/T/0.0/.../.. 21 ENE AERO 20 ENE RMY N/A 1/10 58/38/48/+23/1.55/0.0/000/00 53 SSE AERO 55 SSE RMY 53 1/11 48/21/35/+10/0.00/0.0/.../.. 43 W AERO 45 WSW RMY N/A 1/12 35/19/27/+2/..../.../.../.. 30 SE AERO N/A RMY N/A 1/13 30/17/24/-1/..../.../.../.. 50 W AERO 58 W RMY 54 1/14 28/17/23/-2/T/T/.../.. 26 W AERO N/A RMY 25 1/15 40/23/32/+7/0.00/0.0/.../.. 26 ESE AERO 25 ESE RMY 23 1/16 low since midnight is 32F; normal low is now 17F DAILY RECORDS FOR JANUARY 2016 **1/10/16: NEW DAILY RECORD MAXIMUM TEMPERATURE OF 58F, BREAKS PREVIOUS RECORD OF 54F SET BACK IN 2000** DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 16 HIGH 63F IN 1995 LOW -12F IN 2004 PRECIP 1.32 INS. IN 1936 SNOWFALL 14.0 INS. IN 1965 PEAK GUST 79 MPH WNW IN 1960 RECORDS FOR JANUARY 17 HIGH 55F IN 1973,1995 LOW -8F IN 1907,1982 PRECIP 1.43 INS. IN 1956 SNOWFALL 13.4 INS. IN 1956 PEAK GUST 62 MPH S IN 1994 TODAY'S REPORT PREPARED BY: Robert Millette / Mike Iacono