BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, JANUARY 23, 2017   ALL TIMES ARE IN EASTERN STANDARD TIME WINDS GUSTING UP TO 40 MPH, LIGHT SNOW AS STORM APPROACHES Precipitation totaled 0.16 inches this morning at the  7:00AM observation, with traces of snow on the ground. Light snow and rain fell on and off throughout the day totaling only 0.01 inches by 1:00PM.  Fog limited visibility to 30 miles or less at each observation, and skies remained mostly cloudy. Winds shifted ENE yesterday evening and have stayed out of that direction through the early afternoon.  Peak gusts have been up to approximately 40 MPH. Today's Observations: 7 A.M. Weather: Fog, few cumulus SW-W and NW-N, two layers of broken stratus  Temperature: 34F; Dew Point: 31F; Wind: ENE at 18G27 kts,  Peak Wind: 31 kts (36 mph) ENE @ 6:22 A.M.   Sea-level pressure: 30.00 ins. Hg, falling then rising Visibility: 6 miles, except 20 miles N-NE, 30 miles SW, 10 miles WSW-N,  distant fog SW-NE    6-hr Max temp: 36F 6-hr Min temp: 33F 24-hr precip: 0.16 in 24-hr snowfall: Trace   BHO SA 1155 E18 BKN 37 BKN 6F 158/34/31/0718G27/000/ FEW CU SW-W AND NW-N VSBY N-NE 20 SW 30 WSW-N 10 DSNT FG SW-NE PK WND 0631/22 NEW SNW PST 24 HRS TRACE/ 8/6// 53011 MANUAL 70016 ASOS 70017 10036 20033 10 A.M. Weather: Broken stratocumulus and broken stratus  Temperature: 35F; Dew Point: 31F; Wind: ENE at 16G29 kts Peak Wind: 31 kts (36 mph) ENE @ 9:01 A.M. Sea-level pressure: 30.03 ins. Hg, rising then steady Visibility: 30 miles, except 10 miles W-NE,  distant fog in all directions 3-hr precip: Trace 3-hr snowfall: Trace  BHO SA 1455 E12 BKN 35 OVC 30 170/35/31/0616G29/003/ VSBY W-NE 10  DSNT FG ALDQS PK WND 0731/01 NEW SNW PST 3 HRS TRACE/ 8/6// 51012  MANUAL 600//  1 P.M. Weather: Fog SW-N, scattered stratocumulus, broken stratus and overcast stratus Temperature: 34F; Dew Point: 32F; Wind: ENE at 23G31 kts Peak Wind: 31 kts (36 mph) ENE @ 12:50 P.M. Sea-level pressure: 29.96 ins. Hg, falling, then more slowly Visibility: 15 miles, except 3 miles SW-N, distant fog N-SW  6-hr Max temp: 36F 6-hr Min temp: 33F 6-hr precip: 0.01 in.  6-hr snowfall: Trace BHO SA 1755 12 SCT E25 BNK 31 OVC 15S- 146/34/32/0623G32/996/ VSBY SW-N 3 FG SW-N DSNT FG N-SW PK WND 0631/50 NEW SNW PST 6 HRS TRACE/ 8/6// 58024 MANUAL 6001/ AS0S 60001 10036 10033  SUMMARY FOR SUNDAY, JANUARY 22, 2017   TEMPERATURE (DEGREES F) MAX.....46   NORMAL.....34 MIN.....36   NORMAL.....17 MEAN....41   NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL.......................+16 TOTAL DEPARTURE FOR THE MONTH......................+154 [+6.8 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............24   DEPARTURE.........-16 TOTAL HEATING UNITS FOR THE MONTH.............715   DEPARTURE........-154 TOTAL HEATING UNITS FOR THE SEASON...........2747   DEPARTURE........-426 TOTAL HEATING UNITS LAST SEASON TO DATE......2455   DIFFERENCE.......+292 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................31 ENE AT 11:32 P.M.*                    ASOS........................31 ENE AT  6:25 P.M.                    DAVIS.......................28 E   AT  6:24 P.M. RMY 40 FASTEST MILE FOR YESTERDAY.....................20 ENE AT 10:54 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................22 E   AT 10:57 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................20 E AT 11:33 P.M. AVERAGE WIND SPEED AND DIRECTION.............11.0 NE                      ASOS......................11.7                     DAVIS......................9.7 ENE [60 deg.] *last of multiple occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.16  DEPARTURE......+0.02                          ASOS..............0.17 TOTAL PRECIPITATION FOR THE MONTH..........3.32  DEPARTURE......+0.20                          ASOS..............3.63 TOTAL PRECIPITATION FOR THE YEAR...........3.32  DEPARTURE......+0.20                          ASOS..............3.63 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M........TRACE  DEPARTURE.......-0.6 TOTAL SNOWFALL FOR THE MONTH...............11.2  DEPARTURE.......-1.1 TOTAL SNOWFALL FOR THE SEASON..............19.0  DEPARTURE.......-9.3 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/.../..           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  40/22/31/+6/0.00/0.0/.../..           28 SW  AERO 25 SW  RMY 27 1/17  40/29/35/+10/..../T/.../..            23 E   AERO 23 E   RMY 25 1/18  38/31/30/+10/..../T/.../..            30 ENE AERO 29 ENE RMY 26 1/19  44/30/37/+12/..../T/.../..            21 NNW AERO 20 NNW RMY 20 1/20  40/30/35/+10/..../0.0/.../..          17 NNW AERO 17 NNW RMY N/A 1/21  54/35/45/+20/0.00/0.0/.../..          29 W   AERO 29 W   RMY 28 1/22  46/36/41/+16/..../T/..../..           31 ENE AERO 30 ENE RMY 40 1/22 Low temp since midnight is 33F; 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 23 HIGH 62F IN 1906 LOW -10F IN 1976 PRECIP 2.40 INS. IN 1935 SNOWFALL 14.6 INS. IN 1966 PEAK GUST 85 MPH S IN 1992 RECORDS FOR JANUARY 24 HIGH 60F IN 1967 LOW -12F IN 1907 PRECIP 2.04 INS. IN 1998 SNOWFALL 11.3 INS. IN 1935 PEAK GUST 82 MPH S IN 1996 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle and Kaitlin Geagan