BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, JANUARY 10, 2017   ALL TIMES ARE IN EASTERN STANDARD TIME TEMPERATURES RISE TO ABOVE FREEZING AHEAD OF RAIN With a high of 17F and a low of 4F, yesterday's average temperature of 11F was 15F below normal.  This morning was warmer with a temp. of 16F at 7:00AM, and a max. of 33F at 1:00PM - the first time temps. were above freezing in almost a week.  Visibility was limited to 40 miles or less today as southerly flow brought hazy conditions. Today's Observations: 7 A.M. Weather: Broken altocumulus, scattered cirrus Temperature: 16F; Dew Point: 5F; Wind: WSW at 13 kts Sea-level pressure: 30.66 ins. Hg falling then rising Visibility: 40 miles 6-hr Max temp: 17F 6-hr Min temp: 14F 24-hr precip: 0.00 in. 24-hr snowfall: 0.0 in. BHO SA 1155 E140 BKN 250 SCT 40 381/16/05/2513/066/ 8/031 4/005 53001 10017 20014 10 A.M. Weather: Scattered altocumulus, scattered cirrus Temperature: 24F; Dew Point: 10F; Wind: S at 4 kts, Wind Speed: Light Sea-level pressure: 30.68 ins. Hg, rising, then more quickly Visibility: 30 miles, distant fog in all directions BHO SA 1455 180 SCT 250 SCT 30 390/24/10/1704/068/ DSNT FG ALQDS WND LGT/ 8/031 4/005 53009 1 P.M. Weather: Few altocumulus SW-NW, scattered cirrus Temperature: 33F; Dew Point: 24F; Wind: SE at 9 kts Sea-level pressure: 30.60 ins. Hg, falling, then more quickly Visibility: 20 miles, except 40 miles NE-SSE 6-hr Max temp: 33F 6-hr Min temp: 15F BHO SA 1755 250 SCT 20 361/33/24/1409/060/ FEW AC SW-NW VSBY NE-SSE 40 DSNT HZ ALQDS/ 8/031 4/005 58029 10033 20015 SUMMARY FOR MONDAY, JANUARY 9, 2017   TEMPERATURE (DEGREES F) MAX.....17   NORMAL.....34 MIN......4   NORMAL.....17 MEAN....11   NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL.......................-15 TOTAL DEPARTURE FOR THE MONTH........................+4 [+0.2 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............54   DEPARTURE.........+15 TOTAL HEATING UNITS FOR THE MONTH.............345   DEPARTURE..........-4 TOTAL HEATING UNITS FOR THE SEASON...........2377   DEPARTURE........-277 TOTAL HEATING UNITS LAST SEASON TO DATE......1972   DIFFERENCE.......+405 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY...................23 SSW AT 10:19 P.M.                    ASOS........................25 SW  AT 10:04 P.M.                    DAVIS.......................23 WSW AT  9:53 P.M. RMY 25 FASTEST MILE FOR YESTERDAY.....................20 SSW AT  9:51 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................20 SW  AT 10:26 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................19 SW  AT  9:51 P.M. AVERAGE WIND SPEED AND DIRECTION.............11.2 W                    ASOS......................11.6                    DAVIS......................9.8 W [270 deg.] *last of multiple occurances 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..........2.14  DEPARTURE......+0.86                          ASOS..............2.28 TOTAL PRECIPITATION FOR THE YEAR...........2.14  DEPARTURE......+0.86                          ASOS..............2.28 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.......+6.1 TOTAL SNOWFALL FOR THE SEASON..............19.0  DEPARTURE.......-2.1 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/.../..           35 W   AERO 36 W   RMY 34 1/2   38/29/34/+7/0.00/0.0/.../..           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/.../..            41 WNW AERO 46 WNW RMY 45  1/5   30/23/27/+1/0.00/0.0/.../..           37 W   AERO 39 W   RMY 38 1/6   30/20/25/-1/0.05/1.7/.../..           20 W   AERO 20 W   RMY N/A 1/7   22/14/18/-8/..../.../.../..           32 NNW AERO 39 NNW RMY 38 1/8   20/06/13/-13/..../.../.../..          26 NNW AERO 29 NNW RMY N/A 1/9   17/4/11/-15/0.00/0.0/.../..           23 SSW AERO 23 SSW RMY 25 1/10 Low temp since midnight is 14F; normal low is now 17F DAILY RECORDS FOR JANUARY 2017 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 10 HIGH 58F IN 2016 LOW -7F IN 2004 PRECIP 2.16 INS. IN 1935 SNOWFALL 6.3 INS. IN 1977 PEAK GUST 73e SE IN 1977 RECORDS FOR JANUARY 11 HIGH 59F IN 1975 LOW -7F IN 1968 PRECIP 1.58 INS. IN 2008 SNOW 10.2 INS. 1927 PEAK GUST 95e MPH S IN 1980 TODAY'S REPORT PREPARED BY: Cecilia Borries-Strigle