BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, FEBRUARY 3, 2017 ALL TIMES ARE IN EASTERN STANDARD TIME SNOW FLURRIES LEAVE TRACE OF SNOW, CLOUDS INCREASE THROUGH EARLY AFTERNOON A brief snow shower passed yesterday afternoon leaving a trace of snowfall. Today has seen increasing high clouds and temperatures remaining below freezing. Visibility continues to be quite clear at 70 miles with little fog or haze in the distance. PRELIMINARY STATS FOR JANUARY 2017 TEMPERATURE, Deg. F Avg. Max. 38.9 [+5.1] Avg. Min. 26.4 [+9.3] Mean 32.7 [+7.2] 24-hour corrected mean: 32.7 Max. for month: 59F on 12th Min. for month: 4F on 9th HEATING DEGREE DAYS Total heating units: 995 [-231] Total for the season: 3027 [-504] Total for last season: 2742 PRECIPITATION, Inches Total: 5.50 [+1.15] Greatest in 24 hrs: 1.87 on the 23-24th SNOWFALL, Inches Total: 13.0 [-4.1] Greatest in 24 hrs: 9.5 in. on 7-8th WIND, mph Avg. uncorrected wind speed: 13.1 Avg. corrected wind speed: 13.5 Prevailing wind direction: WNW at 13% Peak gust and direction: 62 NE on 24th SUNSHINE: Campbell-Stokes card minutes: N/A Astronomical total minutes: N/A The 24-hour corrected mean temperature for January of 32.7 deg F is the ninth warmest on record. BHO Warmest January Corrected Mean Temperatures, deg F (1885-2017) 1) 35.6 in 1913 2) 35.0 in 1932 3) 34.6 in 1937 4) 33.9 in 2006 5) 33.8 in 1933 33.8 in 1950 33.8 in 1990 8) 33.5 in 2002 9) 32.7 in 2017 10)32.1 in 1967 32.1 in 1995 Today's Observations: 7 A.M. Weather: Few distant cumulus NNE-E, few cirrostratus Temperature: 20F; Dew Point: 12F; Wind: WSW at 9 kts Sea-level pressure: 30.17 ins. Hg, steady then rising Visibility: 70 miles 6-hr Max temp: 25F 6-hr Min temp: 20F 24-hr precip: Trace 24-hr snowfall: Trace BHO SA 1155 CLR 70 216/20/12/2509/017/ FEW DSNT CU NNE-E FEW CS E-NW NEW SNW PST 24 HRS TRACE/ 8/105 53010 10025 20020 10 A.M. Weather: Few distant cumulus NNE-E, broken cirrostratus Temperature: 25F; Dew Point: 11F; Wind: W at 8 kts Sea-level pressure: 30.17 ins. Hg, falling, then steady Visibility: 70 miles BHO SA 1455 E250 BKN 70 218/25/11/2708/017/ FEW DSNT CU NNE-E/ 8/106 51002 1 P.M. Weather: Few distant cumulus WSW-NNE, broken cirrostratus Temperature: 29F; Dew Point: 11F; Wind: SW at 10G16 kts Sea-level pressure: 30.08 ins. Hg, falling, then more quickly Visibility: 70 miles 6-hr Max temp: 30F 6-hr Min temp: 19F BHO SA 1755 E250 BKN 70 187/29/11/2310G16/008/ FEW DSNT CU WSW-NNE/ 8/106 58031 10030 20019 SUMMARY FOR THURSDAY, FEBRUARY 2, 2017 TEMPERATURE (DEGREES F) MAX.....38 NORMAL.....35 MIN.....25 NORMAL.....17 MEAN....32 NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL........................+6 TOTAL DEPARTURE FOR THE MONTH.......................+12 [+5.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............33 DEPARTURE..........-6 TOTAL HEATING UNITS FOR THE MONTH..............66 DEPARTURE.........-13 TOTAL HEATING UNITS FOR THE SEASON...........3093 DEPARTURE........-516 TOTAL HEATING UNITS LAST SEASON TO DATE......2780 DIFFERENCE.......+313 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................36 WNW AT 2:46 P.M. ASOS........................37 W AT 2:35 P.M. DAVIS.......................36 WNW AT 1:26 P.M. RMY 36 FASTEST MILE FOR YESTERDAY.....................27 WNW AT 2:46 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................26 WNW AT 2:46 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................28 W AT 2:36 P.M. AVERAGE WIND SPEED AND DIRECTION.............13.3 WNW ASOS......................12.7 DAVIS.....................12.0 WNW [290 deg.] *last of multiple occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...Trace DEPARTURE......-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.03 DEPARTURE......-0.24 ASOS..............N/A TOTAL PRECIPITATION FOR THE YEAR...........5.53 DEPARTURE......+0.91 ASOS..............5.91 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M........Trace DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH................0.4 DEPARTURE.......-0.6 TOTAL SNOWFALL FOR THE SEASON..............21.2 DEPARTURE......-12.9 PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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 1/1 41/29/35/+8/0.09/0.0/533/97 35 W AERO 36 W RMY 34 1/2 38/29/34/+7/0.00/0.0/011/02 21 E AERO 20 E RMY N/A 1/3 42/37/40/+14/1.14/0.0/000/00 39 ENE AERO 41 ENE RMY 34 1/4 44/30/37/+11/0.11/T/000/00 41 WNW AERO 46 WNW RMY 45 1/5 30/23/27/+1/0.00/0.0/343/62 37 W AERO 39 W RMY 38 1/6 30/20/25/-1/0.05/1.7/072/13 20 W AERO 20 W RMY N/A 1/7 22/14/18/-8/0.74/9.5/000/00 32 NNW AERO 39 NNW RMY 38 1/8 20/06/13/-13/0.01/T/512/92 26 NNW AERO 29 NNW RMY N/A 1/9 17/04/11/-15/0.00/0.0/335/60 23 SSW AERO 23 SSW RMY 25 1/10 41/14/28/+3/0.18/0.0/369/66 35 SE AERO 37 SE RMY N/A 1/11 53/40/47/+22/0.13/0.0/358/64 51 SSW AERO 48 SSW RMY 57 1/12 59/42/51/+26/0.15/0.0/118/21 37 SSW AERO 40 S RMY 40 1/13 55/23/39/+14/0.00/0.0/535/95 39 WNW AERO 43 WNW RMY 42 1/14 30/14/22/-3/0.00/0.0/339/60 20 SSW AERO 20 SSW RMY 22 1/15 35/23/29/+4/0.00/0.0/555/98 28 NW AERO 28 NW RMY 28 1/16 40/22/31/+6/0.00/0.0/540/95 28 SW AERO 25 SW RMY 27 1/17 40/29/35/+10/0.27/T/257/45 23 E AERO 23 E RMY 25 1/18 38/31/30/+10/0.29/T/000/00 30 ENE AERO 29 ENE RMY 26 1/19 44/30/37/+12/T/T/379/66 21 NNW AERO 20 NNW RMY 20 1/20 40/30/35/+10/T/0.0/000/00 17 NNW AERO 17 NNW RMY N/A 1/21 54/35/45/+20/T/0.0/133/23 29 W AERO 29 W RMY 28 1/22 46/36/41/+16/0.14/T/023/04 31 ENE AERO 30 ENE RMY N/A 1/23 36/33/35/+10/0.48/0.3/000/00 56 NE AERO 58 NE RMY N/A 1/24 40/32/36/+11/1.48/0.0/000/00 62 NE AERO 60 NE RMY 60 1/25 42/32/37/+12/0.03/0.0/486/83 41 WNW AERO 40 WNW RMY 38 1/26 48/36/42/+17/0.10/0.0/024/04 40 W AERO 44 W RMY 41 1/27 42/33/38/+13/T/T/212/36 46 W AERO 46 W RMY 50 1/28 38/29/34/+9/0.00/0.0/249/42 36 WNW AERO 40 WNW RMY 43 1/29 39/28/34/+9/0.00/0.0/143/24 29 WSW AERO 29 WSW RMY 32 1/30 34/20/27/+1/0.00/0.0/185/31 30 WNW*AERO 31 WNW RMY 31 1/31 28/15/22/-4/0.11/1.5/198/33 29 WNW AERO 30 WNW RMY N/A DAILY RECORDS FOR JANUARY 2017 1/12/17: NEW DAILY RECORD HIGH MAXIMUM TEMP. OF 59F, PREVIOUS RECORD WAS 57F SET 1913 AND TIED IN 1975 1/12/17: NEW DAILY RECORD HIGH MINIMUM TEMP. OF 42F, PREVIOUS RECORD WAS 40F SET 2006 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 2/1 40/23/32/+6/0.03/0.4/.../.. 43 W AERO 44 W RMY 47 2/2 38/25/32/+6/T/T/.../.. 36 WNW AERO 37 WNW RMY 36 2/3 Low temp since midnight is 19F; normal low is now 17F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR FEBRUARY 3 HIGH 58F IN 1991 LOW -7F IN 1955 PRECIP 2.14 INS. IN 1970 SNOWFALL 7.0 INS. IN 1913 PEAK GUST 102 MPH S IN 1970 [RECORD FOR MONTH] RECORDS FOR FEBRUARY 4 HIGH 63F IN 1991 LOW -4F IN 1886, 1908 PRECIP 1.80 INS. IN 1926 SNOWFALL 15.0 INS. IN 1961 PEAK GUST 89 MPH SSE IN 1972 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle and Kaitlin Geagan