BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, JANUARY 31, 2016 ALL TIMES ARE IN EASTERN STANDARD TIME CLOUDS MOVE IN AS TEMPERATURES RISE The morning low temperature was 36 degrees since midnight and high through early afternoon which is pretty seasonable for this time of year. Cloudy conditions prevailed throughout the morning and into the afternoon as the pressure began to fall. Temperatures have warmed into the lower 50’s, and as of the 1 o’clock observation, were just 4 degrees shy of the record. Humidity has continued to drop all day and now sits at 41%. Today's Observations: 7 A.M. Weather: Broken Altocumulus and Altostratus Temperature: 36F; Dew Point: 27F; Wind: SSW at 14 kts, Sea-level pressure: 29.23 ins. Hg, increasing then more slowly Visibility: 35 miles, 6-hr Max temp: 37F 6-hr Min temp: 36F 24-hr precip: none 24-hr snowfall: none Snow depth: TRACE(snow cover patchy) BHO SA 1155 E130 BKN 35 135/36/27/2114/993/ HAZY/ 8/07/ 51006 10037 20036 10 A.M. Weather: Broken Altocumulus and Altostratus Temperature: 41F; Dew Point: 29F; Wind: WSW at 12 kts, Sea-level pressure: 29.92 ins. Hg, increasing then decreasing Visibility: 35 miles BHO SA 1455 E110 BKN 35 132/41/29/2112/992/ HAZY/ 8/07// 58003 1 P.M. Weather: Broken Cirrostratus Temperature: 39F; Dew Point: 19F; Wind: SW at 8 kts, Sea-level pressure: 29.85 ins. Hg, increasing then decreasing but lower Visibility: 50 miles 6-hr Max temp: 53F 6-hr Min temp: 36F BHO SA 1755 E150 BKN 50 111/53/30/2112/985/ LGT DSNT HZ/ 8/008 58021 10053 20036 SUMMARY FOR SATURDAY, JANUARY 30, 2016 TEMPERATURE (DEGREES F) MAX.....42 NORMAL.....34 MIN.....26 NORMAL.....17 MEAN....33 NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL........................+8 TOTAL DEPARTURE FOR THE MONTH.......................+121 [+3.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............31 DEPARTURE.........-9 TOTAL HEATING UNITS FOR THE MONTH............1067 DEPARTURE........-120 TOTAL HEATING UNITS FOR THE SEASON...........2723 DEPARTURE........-768 TOTAL HEATING UNITS LAST SEASON TO DATE......3297 DIFFERENCE.......-574 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................39 SW AT 11:57 P.M. ASOS........................38 SW AT 11:55 P.M. DAVIS.......................38 SW AT 11:54 P.M. RMY 38 FASTEST MILE FOR YESTERDAY.....................29 SW AT 11:58 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................30 SW AT 11:55 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................30 SW AT 11:55 P.M. AVERAGE WIND SPEED AND DIRECTION...............14.5 NW ASOS........................15.0 DAVIS.......................13.0 WSW [251 Deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE......-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........3.77 DEPARTURE......-0.45 ASOS..............3.94 TOTAL PRECIPITATION FOR THE YEAR...........3.77 DEPARTURE......-0.45 ASOS..............3.94 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH...............14.3 DEPARTURE.......-2.3 TOTAL SNOWFALL FOR THE SEASON..............15.6 DEPARTURE......-17.0 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/0.0/000/00 28 E AERO 25 ENE RMY 25 1/9 39/36/38/+12/T/0.0/000/00 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/+10/0.00/0.0/559/100 43 W AERO 45 WSW RMY N/A 1/12 35/19/27/+2/..../.../359/64 30 SE AERO N/A RMY N/A 1/13 30/17/24/-1/..../.../551/98 50 W AERO 58 W RMY 54 1/14 28/17/23/-2/T/T/389/69 26 W AERO N/A RMY 25 1/15 40/23/32/+7/0.00/0.0/102/18 26 ESE AERO 25 ESE RMY 23 1/16 41/32/37/+12/1.03/T/000/00 32 NNW AERO 32 NNW RMY 28 1/17 33/26/30/+5/..../.../.../.. 29 WNW AERO 28 WNW RMY N/A 1/18 26/15/21/-4/..../.../487/82 50 W AERO 50 W RMY 47 1/19 22/13/18/-7/0.00/0.0/194/34 55 WNW AERO 59 W RMY 55 1/20 30/15/23/-2/0.00/0.0/.../.. 46 WNW AERO 47 WNW RMY 45 1/21 30/15/23/-2/0.00/0.0/.../.. 38 WNW AERO 38 NW RMY 35 1/22 28/14/21/-4/0.00/0.0/.../.. 32 NW AERO 32 NW RMY N/A 1/23 30/18/24/-1/0.74/7.1/000/00 54 NE AERO 56 NE RMY 50 1/24 33/14/24/-1/T/T/.../.. 34 N AERO 37 N RMY 29 1/25 37/20/29/+4/0/0/.../.. 22 NW AERO 22 NW RMY N/A 1/26 49/27/38/+13/0/0/.../.. 44 SSW AERO 47 SSW RMY 43 1/27 43/27/35/+10/0/0/.../.. 38 WNW AERO 40 SSW RMY 37 1/28 41/23/32/+7/0/0/.../.. 29 SSW AERO 29 SSW RMY 29 1/29 39/32/36/+11/0/0/.../.. 25 NW AERO 24 NW RMY 28 1/30 42/26/33/+8/0/0/.../.. 39 SW AERO 43 SW RMY 38 1/31 morning low since midnight 36F; normal low is 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 31 HIGH 58F IN 1913, 1947, 2013 LOW -12F IN 1920 PRECIP 1.03 INS. IN 1914 SNOWFALL 9.0 INS. IN 1898 PEAK GUST 75 MPH NW IN 1974 RECORDS FOR FEBRUARY 1 HIGH 65F IN 1989 LOW -9F IN 1920 PRECIP 1.30 INS. IN 1898 SNOWFALL 11.0 INS. IN 1898 PEAK GUST 66e MPH SSW IN 1951 TODAY'S REPORT PREPARED BY: Robert Millette