BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, JANUARY 31, 2018   ALL TIMES ARE IN EASTERN STANDARD TIME COLD, CLEAR, AND DRY DAY... Yesterday we had snow start early in the  morning and a total of 5.9 inches accumulated. Today started off very clear with only a  few clouds in the sky. The cloud cover  increased throughout the day and we had scattered cirrus by 1:00 P.M. Humidity was low and decreased throughout the day. This allowed for excellent visibility today with 80 miles by 10:00 A.M. Wind from the WNW began moderate but was light by the afternoon. Today's Observations: 7 A.M. Weather: Clear, few stratocumulus distant offshore ENE-E Temperature: 12F; Dew Point: 7F; Wind: WNW at 9 kts Sea-level pressure: 30.15 ins. Hg, rising unsteadily Visibility: 70 miles 6-hr Max temp: 18F 6-hr Min temp: 12F 24-hr precip: 0.15 ins. 24-hr snowfall: 2.3 ins. Snow depth: 6 ins. BHO SA 1155 CLR 70 211/12/07/2909/015/ NEW SNW PST 24 HRS  2.3 INS FEW SC DSNT OFFSHR ENE-E/ 8/500 4/006 52021 MANUAL  70015 ASOS 70019 10018 20012 10 A.M. Weather: Clear Few cumulus along the horizon E, few cirrostratus SSW Temperature: 20F; Dew Point: 4F; Wind: W at 9 kts Sea-level pressure: 30.22 ins. Hg, rising, then more slowly  Visibility: 80 miles 3-hr precip: 0.00 ins. 3-hr snowfall: 0.0 ins.  BHO SA 1455 CLR 80 232/20/04/2809/022/ FEW CU DSNT ALG HRZN  E FEW CS SSW/ 8/105 51021  1 P.M. Weather: Scattered cirrostratus  Temperature: 25F; Dew Point: 6F; Wind: WSW at 6 kts, Wind: Light Sea-level pressure: 30.15 ins. Hg, falling, then more rapidly Visibility: 80 miles 6-hr Max temp: 27F 6-hr Min temp: 12F 6-hr precip: 0.00 ins. 6-hr snowfall: 0.0 ins. Snow depth: 4 ins.  BHO SA 1755 E250 SCT 80 209/25/06/2506/015/ WND LGT/ 8/006  4/004 56023 10027 20012  SUMMARY FOR TUESDAY, JANUARY 30, 2018 TEMPERATURE (DEGREES F) MAX.....27   NORMAL.....34 MIN.....17   NORMAL.....17 MEAN....22   NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL............................-4 TOTAL DEPARTURE FOR THE MONTH............................+6 [+0.0 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY.............43   DEPARTURE..........+3 TOTAL HEATING UNITS FOR THE MONTH...........1155   DEPARTURE.........-32 TOTAL HEATING UNITS FOR THE SEASON..........3277   DEPARTURE........-215 TOTAL HEATING UNITS LAST SEASON TO DATE.....2984   DIFFERENCE.......+293 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................35 NW AT 10:39 P.M.                     AERO.........................35 NW AT 10:38 P.M.                    ASOS.........................36 NW AT 10:39 P.M.                    DAVIS........................34 M  AT 10:38 P.M.** RMY 38  FASTEST MILE FOR YESTERDAY......................23 NW AT 10:39 P.M.*    MAXIMUM 2-MINUTE ASOS AVERAGE...................23 NW AT 11:52 P.M.   MAXIMUM 2-MINUTE DAVIS AVERAGE..................23 M  AT 11:51 P.M.** AVERAGE WIND SPEED AND DIRECTION..............14.0 NW                    ASOS.......................14.4                    DAVIS......................12.5 **  * Estimated ** Davis direction malfunctioning *** Last of multiple occurences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.15  DEPARTURE......+0.01                          ASOS..............0.19 TOTAL PRECIPITATION FOR THE MONTH..........6.00  DEPARTURE......+1.78                          ASOS..............6.58 TOTAL PRECIPITATION FOR THE YEAR...........6.00  DEPARTURE......+1.78                          ASOS..............6.58 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........2.3  DEPARTURE........+1.8 TOTAL SNOWFALL FOR THE MONTH...............25.2  DEPARTURE........+8.5 TOTAL SNOWFALL FOR THE SEASON..............34.5  DEPARTURE........+1.8 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 1/01 11/-5/3/-24/0.00/0.0/538/98     30 NW  AERO 30 NW  RMY 31 1/02 15/-2/7/-20/0.00/0.0/402/73     26 W   AERO 25 W   RMY 26   1/03 28/11/20/-6/0.00/0.0/430/78     23 WSW AERO 20 WSW RMY N/A 1/04 28/18/23/-3/1.66/16.5/000/00    54 NNW AERO 60 NNW RMY 64 1/05 18/2/10/-16/0.00/0.0/431/78     53 W   AERO 53 W   RMY 57 1/06 10/-2/4/-22/0.00/0.0/554/100    43 WSW AERO 47 WSW RMY 47 1/07 14/-8/3/-23/0.00/0.0/549/99     37 WNW AERO 35 WNW RMY N/A  1/08 33/14/24/-2/0.02/T/006/01       40 S   AERO 40 S   RMY 42  1/09 40/25/33/+7/T/T/356/64          37 W   AERO 35 W   RMY 33 1/10 36/20/28/+3/0.00/0.0/553/99     30 W   AERO 30 W   RMY N/A 1/11 50/32/41/+16/0.00/0.0/056/10    33 S   AERO 32 S   RMY 34 1/12 60/45/53/+28/..../0.0/011/02    56 S   AERO 56 S   RMY 55 1/13 60/17/39/+14/..../0.0/265/47    58 SSW AERO 60 SSW RMY 62 1/14 21/11/16/-9/0.00/0.0/350/62     30 NW  AERO 30 NW  RMY N/A 1/15 18/11/15/-10/0.02/0.5/000/00    23 NNW AERO 21 N   RMY 23 1/16 31/18/25/0/0.00/0.0/153/27      17 SSE AERO 15 SSE RMY N/A  1/17 32/29/31/+6/0.23/2.3/000/00     20 SE  AERO 17 SE  RMY N/A 1/18 29/16/23/-2/0.00/0.0/497/87     24 NW  AERO 23 NW  RMY 26  1/19 34/17/26/+1/0.00/0.0/229/40     22 SSW AERO 20 SSW RMY N/A 1/20 45/27/36/+11/0.00/0.0/161/28    38 WSW AERO 37 WSW RMY 39  1/21 47/34/41/+16/0.00/0.0/467/81    22 W   AERO 21 W   RMY N/A 1/22 37/34/36/+11/..../0.0/000/00    21 E   AERO 16 E   RMY N/A 1/23 55/33/44/+19/..../0.0/000/00    53 S   AERO 58 S   RMY 57  1/24 37/22/30/+5/0.00/0.0/.../..     36 WNW AERO 35 WNW RMY 36  1/25 29/17/23/-2/0.00/0.0/.../..     35 WNW AERO 36 WNW RMY 41  1/26 32/15/24-1/0.00/0.0/.../..      28 WNW AERO 28 WNW RMY N/A 1/27 52/24/38/+13/.../0.0/.../..     43 SSW AERO 44 SSW RMY N/A 1/28 50/39/45/+20/..../0.0/.../..    35 SSW AERO 37 SSW RMY N/A 1/29 39/25/32/+7/..../.../000/00     37 NNE AERO 32 NNE RMY 35  1/30 27/17/22/-4/..../5.9/000/00     35 NW  AERO 35 NW  RMY 38   1/31 Low temp since midnight is 12F; normal low is now 17F DAILY RECORDS FOR JANUARY 2018 01/04/18: NEW DAILY RECORD MAXIMUM SNOWFALL OF 16.5 INS.            PREVIOUS RECORD WAS 8.6 INS. SET IN 1923 AND            TIED IN 1942  01/07/18: NEW DAILY RECORD LOW MINIMUM TEMPERATURE OF  -8F, PREVIOUS RECORD OF -7F WAS SET IN 1896 01/12/18: NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF            45F, PREVIOUS RECORD OF 42F WAS SET IN 2017           NEW DAILY RECORD HIGH MAXIMUM TEMPERATURE OF      60F, PREVIOUS RECORD OF 59F WAS SET IN 2017 01/13/18: NEW DAILY RECORD HIGH MAXIMUM TEMPERATURE OF    60F, PREVIOUS RECORD OF 57F WAS SET IN 1890            AND TIED IN 1932  01/28/18: TIED DAILY RECORD HIGH MINIMUM TEMPERATURE OF            39F, PREVIOUS RECORD OF 39F WAS SET IN 1974 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):       RECORDS FOR JANUARY 31 HIGH 58F IN 1913, 1947, 2013 LOW -12F IN 1920 PRECIP 1.03 INS. IN 1914 SNOWFALL 9.0 INS. IN 1898 PEAK GUST 75 MPH NW IN 1974 RECORDS FOR FEBRUARY 1 HIGH 65F IN 1989 LOW -9F IN 1920 PRECIP 1.30 INS. IN 1898 SNOWFALL 11.0 INS. IN 1898 PEAK GUST 66e MPH SSW IN 1951 TODAY'S REPORT PREPARED BY: Kaitlin Geagan