BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, JANUARY 30, 2018   ALL TIMES ARE IN EASTERN STANDARD TIME SNOWSTORM LEAVES 6 INCHES ON TOP OF GREAT  BLUE HILL... A light snow/ rain mixture began falling yesterday afternoon and continued on and off throughout the night. So far today we measured a total of 5.9 ins. of snow and 0.42 inches of liquid precipitation by  1:00 P.M. Wind from the NNW was moderate today  frequently gusting to 20 kts (23 MPH). With wind  coming from the north temperatures remained below seasonable with a high of 25F by 1:00 P.M. This is 9 degrees below the daily normal of 34F. We had a significant decrease in humidity from 95% at  10:00 A.M. to 55% at 1:00 P.M. This allowed for visibility to greatly increase from 1 1/2 miles to 70 miles.  Today's Observations: 7 A.M. Weather: Light snow and fog, overcast nimbostratus  Temperature: 18F; Dew Point: 16F; Wind: NNW at 9G18 kts Sea-level pressure: 29.94 ins. Hg, falling then rising  Visibility: 3/4 mile 6-hr Max temp: 24F 6-hr Min temp: 18F 24-hr precip: 0.27 ins. 24-hr snowfall: 3.6 ins. Snow depth: 4 ins. BHO SA 1155 E8 OVC 3/4S-F 140/18/16/3309G18/994/ NEW  SNW PST 24 HRS 3.6 INS/ 8/6// 4/004 53003 MANUAL 70027  ASOS 70025 10024 20018 10 A.M. Weather: Light snow and fog, overcast nimbostratus  Temperature: 19F; Dew Point: 18F; Wind: NNW at 11G18 kts Sea-level pressure: 29.91 ins. Hg, falling, then more slowly  Visibility: 1 1/2 miles 3-hr precip: 0.14 ins. 3-hr snowfall: 2.2 ins.  BHO SA 1455 E16 OVC 1 1/2S-F 127/19/18/3311G18/991/ NEW  SNW PST 3 HRS 2.2 INS VSBY NNW-NNE 1/2/ 8/6// 58013  MANUAL 6014/ ASOS 60017  1 P.M. Weather: Overcast stratus  Temperature: 25F; Dew Point: 11F; Wind: NW at 10G16 kts Sea-level pressure: 29.84 ins. Hg, falling, then more slowly Visibility: 70 miles 6-hr Max temp: 25F 6-hr Min temp: 17F 6-hr precip: 0.15 ins. 6-hr snowfall: 2.3 ins. Snow depth: 6 ins.  BHO SA 1755 E40 OVC 70 106/25/11/3210G16/984/ NEW SNW PST  6 HRS 2.3 INS/ 8/6// 4/006 56021 MANUAL 6015/ ASOS 60019  10025 20017    SUMMARY FOR MONDAY, JANUARY 29, 2018 TEMPERATURE (DEGREES F) MAX.....39   NORMAL.....34 MIN.....25   NORMAL.....17 MEAN....32   NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL............................+7 TOTAL DEPARTURE FOR THE MONTH...........................+10 [+0.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY.............33   DEPARTURE..........-7 TOTAL HEATING UNITS FOR THE MONTH...........1112   DEPARTURE.........-35 TOTAL HEATING UNITS FOR THE SEASON..........3234   DEPARTURE........-218 TOTAL HEATING UNITS LAST SEASON TO DATE.....2946   DIFFERENCE.......+288 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................37 NNE AT 10:06 A.M.                     AERO.........................32 NNE AT 11:06 P.M.***                    ASOS.........................37 NNE AT 11:06 P.M.                    DAVIS........................35 M   AT 11:05 P.M.** RMY 35  FASTEST MILE FOR YESTERDAY......................24 NNE AT 11:05 P.M.*    MAXIMUM 2-MINUTE ASOS AVERAGE...................25 NNE AT 11:06 P.M.   MAXIMUM 2-MINUTE DAVIS AVERAGE..................24 M   AT 11:07 P.M.** AVERAGE WIND SPEED AND DIRECTION..............14.8 NE                    ASOS.......................15.1                    DAVIS......................13.0 **  * Estimated ** Davis direction malfunctioning *** Last of multiple occurences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.27  DEPARTURE......+0.13                          ASOS..............0.25 TOTAL PRECIPITATION FOR THE MONTH..........5.85  DEPARTURE......+1.77                          ASOS..............6.39 TOTAL PRECIPITATION FOR THE YEAR...........5.85  DEPARTURE......+1.77                          ASOS..............6.39 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........3.6  DEPARTURE........+3.0 TOTAL SNOWFALL FOR THE MONTH...............22.9  DEPARTURE........+6.7 TOTAL SNOWFALL FOR THE SEASON..............32.2  DEPARTURE.........0.0 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/.../00        20 SE  AERO 17 SE  RMY N/A 1/18 29/16/23/-2/0.00/0.0/.../..        24 NW  AERO 23 NW  RMY 26  1/19 34/17/26/+1/0.00/0.0/.../..        22 SSW AERO 20 SSW RMY N/A 1/20 45/27/36/+11/0.00/0.0/.../..       38 WSW AERO 37 WSW RMY 39  1/21 47/34/41/+16/0.00/0.0/.../..       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 Low temp since midnight is 17F; 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 30 HIGH 60F IN 1914 LOW -8F IN 1948 PRECIP 1.12 INS. IN 1925 SNOWFALL 6.5 INS. IN 1986 PEAK GUST 76 MPH WNW IN 1962 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 TODAY'S REPORT PREPARED BY: Kaitlin Geagan and Ben Turner