BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, JANUARY 16, 2017   ALL TIMES ARE IN EASTERN STANDARD TIME SEASONABLE DAY WITH S-SW WINDS AND DRY CONDITIONS High pressure over the region is bringing us mostly sunny skies and dry, seasonable conditions.  Thin fog was trapped under a  temperature inversion at the 7:00AM ob this morning.  Visibility decreased slightly at the 10:00AM ob due to distant haze but increased back to 70 miles by early afternoon.  Winds shifted out of the SW around 7:00AM this morning and have remained from that direction all day. Today's Observations: 7 A.M. Weather: Few distant cumulus ESE, thin fog below temperature inversion   Temperature: 25F; Dew Point: 12F; Wind: S at 6 kts, Wind Speed: Light  Sea-level pressure: 30.42 ins. Hg, steady then increasing Visibility: 70 miles 6-hr Max temp: 25F 6-hr Min temp: 22F 24-hr precip: 0.00 in. 24-hr snowfall: 0.0 in. BHO SA 1155 CLR 70 303/25/12/1906/042/ FEW CU DSNT ESE  THN FG BLO INVSN WND LGT/ 8/100 53002 10025 20022 10 A.M. Weather: Few distant cirrus SSE-W Temperature: 31F; Dew Point: 17F; Wind: SSW at 8 kts Sea-level pressure: 30.43 ins. Hg, falling then rising Visibility: 60 miles, distant haze in all directions   BHO SA 1455 CLR 60 304/31/17/2008/043/ FEW CI DSNT SSE-W  DSNT HZ ALQDS/ 8/001 53001 1 P.M. Weather: Scattered cirrus  Temperature: 38F; Dew Point: 19F; Wind: SW at 13G20 kts  Sea-level pressure: 30.32 ins. Hg, falling, then more quickly Visibility: 70 miles 6-hr Max temp: 39F 6-hr Min temp: 25F BHO SA 1755 250 SCT 70 269/38/19/2313G20/032/ 8/001 58035 10039 20025   SUMMARY FOR SUNDAY, JANUARY 15, 2017   TEMPERATURE (DEGREES F) MAX.....35   NORMAL.....33 MIN.....23   NORMAL.....17 MEAN....29   NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL........................+4 TOTAL DEPARTURE FOR THE MONTH.......................+70 [+4.5 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............36   DEPARTURE..........-4 TOTAL HEATING UNITS FOR THE MONTH.............519   DEPARTURE.........-68 TOTAL HEATING UNITS FOR THE SEASON...........2551   DEPARTURE........-341 TOTAL HEATING UNITS LAST SEASON TO DATE......2173   DIFFERENCE.......+378 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................28  NW AT 10:01 A.M.                    ASOS........................28 NNW AT 10:02 A.M.                    DAVIS.......................26   N AT 11:58 A.M.  RMY 28 FASTEST MILE FOR YESTERDAY.....................18  NW AT 10:01 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................10  NW AT 10:24 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................19  NW AT 10:24 A.M. AVERAGE WIND SPEED AND DIRECTION.............10.1 NW                      ASOS......................10.2                    DAVIS......................9.2 NNW [335 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.15                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.60  DEPARTURE......+0.46                          ASOS..............2.85 TOTAL PRECIPITATION FOR THE YEAR...........2.60  DEPARTURE......+0.46                          ASOS..............2.85 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.6 TOTAL SNOWFALL FOR THE MONTH...............11.2  DEPARTURE.......+2.7 TOTAL SNOWFALL FOR THE SEASON..............19.0  DEPARTURE.......-5.5 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   17/4/11/-15/0.00/0.0/335/60           23 SSW AERO 23 SSW RMY 25 1/10  41/14/28/+3/0.18/0.0/.../..           35 SE  AERO 37 SE  RMY N/A 1/11  53/40/47/+22/0.13/0.0/.../..          51 SSW AERO 48 SSW RMY 57 1/12  59/42/51/+26/0.15/0.0/.../..          37 SSW AERO 40 S   RMY 40 1/13  55/23/39/+14/0.00/0.0/.../..          39 WNW AERO 43 WNW RMY 42 1/14  30/14/22/-3/0.00/0.0/.../..           20 SSW AERO 20 SSW RMY 22 1/15  35/23/29/+4/0.00/0.0/.../..           28 NW  AERO 28 NW  RMY 28  1/16 Low temp since midnight is 22F; normal low is now 17F 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 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: Cecilia Borries-Strigle and Kaitlin Geagan