BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, JANUARY 25, 2016 ALL TIMES ARE IN EASTERN STANDARD TIME CLEAR AND COLD START GIVES WAY TO WARM UP With 6 inches of snowfall still on the ground, the sun came out this morning and has slowly been warming things up since the 7 AM observation after an overnight low of 20F. Few clouds could be seen all day with some cirrostratus moving in by the 1 o'clock observation. Temperatures had warmed up into the mid 30's and a warm up is expected for the next few days. Today's Observations: 7 A.M. Weather: Clear, Few cumulus distant N-NE Temperature: 21F; Dew Point: 15F; Wind: NW at 7 kts, Sea-level pressure: 30.17 ins. Hg, steady, then rising Visibility: 50 miles 6-hr Max temp: 26F 6-hr Min temp: 20F 24-hr precip: Trace 24-hr snowfall: Trace Snow depth: 6 ins. BHO SA 1155 CLR 50 217/21/15/3007/017/ FEW CU DSNT N-NE LGT DSNT HZ/ 8/100 4/006 53026 10026 20020 10 A.M. Weather: Clear, few stratocumulus distant SW few cirrus distant E-SE Temperature: 29F; Dew Point: 26F; Wind: N at 8 kts, Sea-level pressure: 30.25 ins. Hg, rising, then more slowly Visibility: 60 miles BHO SA 1455 CLR 60 245/29/26/3108/025/ FEW SC DSNT SW LGT DSNT HZ/ 8/500 53028 1 P.M. Weather: Scattered Ccrrostratus Temperature: 35F; Dew Point: 23F; Wind: Calm Sea-level pressure: 30.24 ins. Hg, rising then falling Visibility: 60 miles 6-hr Max temp: 35F 6-hr Min temp: 20F 6-hr precip: 0.00 ins. 6-hr snowfall: 0.0 ins. BHO SA 1755 250 SCT 60 242/35/23/0000/024/ WND LGT LGT DSNT HZ/ 8/005 58003 10035 20021 SUMMARY FOR SUNDAY, JANUARY 24, 2016 TEMPERATURE (DEGREES F) MAX.....33 NORMAL.....34 MIN.....14 NORMAL.....17 MEAN....24 NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL........................-1 TOTAL DEPARTURE FOR THE MONTH.......................+68 [+2.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............41 DEPARTURE..........+1 TOTAL HEATING UNITS FOR THE MONTH.............881 DEPARTURE.........-68 TOTAL HEATING UNITS FOR THE SEASON...........2537 DEPARTURE........-716 TOTAL HEATING UNITS LAST SEASON TO DATE......3026 DIFFERENCE.......-489 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................34 N AT 12:52 A.M. ASOS........................36 N AT 12:16 A.M. DAVIS.......................34 N AT 12:08 A.M. RMY 29 FASTEST MILE FOR YESTERDAY.....................25 N AT 1:39 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................25 N AT 12:05 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................24 N AT 12:05 A.M. AVERAGE WIND SPEED AND DIRECTION..............12.6 N ASOS.......................12.3 DAVIS......................10.9 NN [005 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......+0.37 ASOS..............3.94 TOTAL PRECIPITATION FOR THE YEAR...........3.77 DEPARTURE......+0.37 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.......+1.0 TOTAL SNOWFALL FOR THE SEASON..............15.6 DEPARTURE......-13.7 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/.../.. 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 41/32/37/+12/1.03/T/.../.. 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/..../.../.../.. 50 W AERO 50 W RMY 47 1/19 22/13/18/-7/0.00/0.0/.../.. 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 low since midnight is 20F; 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 25 HIGH 56F IN 2010 LOW -10F IN 1935 PRECIP 2.24 INS. IN 1979 SNOWFALL 12.5 INS. IN 1941 PEAK GUST 81 MPH WNW IN 1972 RECORDS FOR JANUARY 26 HIGH 68F IN 1950 [RECORD FOR MONTH] LOW -5F IN 1920 PRECIP 1.60 INS. IN 1958 SNOW 9.0 INS. IN 1898 WIND 90e MPH SE IN 1978 TODAY'S REPORT PREPARED BY: Robert Millette