BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JANUARY 19, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME CLOUDS MOVE IN OVERHEAD DESPITE DRY CONDITIONS...  While we anticipate tonight's forecast storm, weather conditions today have yet to display some of the traditional signs of an impending storm.  So far, pressure has stayed relatively high, with station pressure hovering around 1000 MB around the time of the 1 P.M. observation.  Additionally, conditions have stayed fairly dry, with relative humidity falling throughout the morning, with 57% observed at 1 P.M.  In spite of these trends, cloud activity may provide a bigger frame of reference in terms of regional weather patterns.  In this capacity, the evolution of today's cloud cover has been noteworthy.  The 7 A.M. observation was striking, with clear skies overhead, but significant cloud cover in all directions when peering into the distance.  Eventually, bands of altocumulus began to fill in around 10 A.M. until the overcast layer of altostratus was reached just after noon.  Wind speeds have been no more than a light breeze throughout the observation period, with the most  notable change reflected in the shift from northerly to northeasterly winds. Today's Observations: 7 A.M. Weather: Few distant altocumulus in all directions, few distant altostratus in all directions, few distant cirrocumulus in all directions Temperature: 25F; Dew Point: 18F; Wind: NNE at 7 kts Sea-level pressure: 30.25 ins. Hg, rising, then more rapidly Visibility: 35 miles 6-hr Max temp: 28F 6-hr Min temp: 25F 24-hr Precip: 0.00 24-hr snowfall: 0.0 Snow depth: 0 ins.  BHO SA 1155 CLR 35 243/25/18/0207/025/ FEW DSNT AC ALQDS FEW DSNT AS ALQDS FEW DSNT CC ALQDS/ 8/029/ 53021 10028 20025 10 A.M. Weather: Few altocumulus, few cirrocumulus, few distant altostratus in all directions Temperature: 29F; Dew Point: 16F; Wind: NNE at 7 kts Sea-level pressure: 30.30 ins. Hg, rising, then more rapidly Visibility: 50 miles 3-hr Precip: 0.00 ins. BHO SA 1455 CLR 50 262/29/16/0307/030/ FEW AC FEW CC FEW DSNT AS ALQDS/ 8/059/ 53019 1 P.M. Weather: Overcast altostratus Temperature: 28F; Dew Point: 15F; Wind: ENE at 6 kts, Wind: Light and variable Sea-level pressure: 30.27 ins. Hg, increasing, then decreasing Visibility: 45 miles 6-hr Max temp: 31F 6-hr Min temp: 24F 6-hr Precip: 0.00 ins. 6-hr snowfall: 0.0 ins.   Snow depth: 0 ins. BHO SA 1755 E35 OVC 45 249/28/15/0706/027/ WND LGT/ 8/02// 58013 10031 20024 SUMMARY FOR FRIDAY, JANUARY 18, 2019  TEMPERATURE (DEGREES F) MAX.....40   NORMAL.....33 MIN.....21   NORMAL.....17 MEAN....31   NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL........................+6 TOTAL DEPARTURE FOR THE MONTH.......................+51 [+2.6 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............34   DEPARTURE.........-6 TOTAL HEATING UNITS FOR THE MONTH.............658   DEPARTURE........-50 TOTAL HEATING UNITS FOR THE SEASON...........2954   DEPARTURE........-58 TOTAL HEATING UNITS LAST SEASON TO DATE......2894   DIFFERENCE.......+60 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................18  WNW AT 10:09 P.M.                    AERO.........................18  WNW AT 10:09 P.M.                    ASOS.........................19  WNW AT 10:10 P.M.                     DAVIS........................20  WNW AT 10:10 P.M. RMY N/A FASTEST MILE FOR YESTERDAY......................13  W   AT  5:25 P.M.  MAXIMUM 2-MINUTE ASOS AVERAGE...................14  WNW AT  9:13 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................14  W   AT  5:33 P.M. AVERAGE WIND SPEED AND DIRECTION...............9.0 SE                   ASOS........................8.7                    DAVIS.......................9.6 S [188 deg.]    PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.......-0.13                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.14  DEPARTURE.......-0.43                          ASOS..............2.15 TOTAL PRECIPITATION FOR THE YEAR...........2.14  DEPARTURE.......-0.43                          ASOS..............2.15  SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........-0.6 TOTAL SNOWFALL FOR THE MONTH..............Trace  DEPARTURE.......-10.1 TOTAL SNOWFALL FOR THE SEASON...............7.7  DEPARTURE.......-17.9 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 01/01 54/29/42/+15/..../0.0/.../..       53 W   AERO 53 W   RMY 54 01/02 34/24/29/+2/..../.../.../..         22 NW  AERO 22 NW  RMY N/A 01/03 42/28/35/+9/0.01/T/.../..          28 WNW AERO 30 WNW RMY 30 01/04 43/30/37/+11/..../.../.../..        29 SW  AERO 29 SW  RMY 29 01/05 41/32/37/+11/1.19/.../.../..        26 NE  AERO 25 NNW RMY 27 01/06 42/21/32/+6/0.00/0.0/.../..       42 NW  AERO 46 NW  RMY 50 01/07 26/14/20/-6/.../.../.../..          37 NW  AERO 41 NW  RMY N/A 01/08 40/24/32/+6/.../.../.../..         24 SSE AERO 23 SSE RMY N/A 01/09 42/31/37/+11/.../.../.../..         44 W   AERO 46 WNW RMY 45 01/10 32/20/26/+1/T/T/.../..              37 NW  AERO 41 NW  RMY 43 01/11 26/12/19/-6/0.00/0.0/.../..         36 WNW AERO 37 WNW RMY 38 01/12 26/9/18/-7/0.00/0.0/.../..          32 NW  AERO 32 NW  RMY 29 01/13 25/11/18/-7/0.00/0.0/.../..         18 NNW AERO 16 NW  RMY N/A 01/14 27/20/24/-1/0.00/0.0/.../..         20 NNE AERO 17 N   RMY N/A 01/15 34/18/26/1/0.00/0.0/.../..          22 NW  AERO 21 NNW RMY N/A 01/16 34/23/29/+4/0.00/0.0/.../.. 33 W AERO 32 W RMY 35 01/17 27/13/20/-5/0.00/0.0/.../..         30 NNW AERO 28 NW  RMY N/A 01/18 40/21/31/+6/0.00/0.0/.../..        18 WNW AERO 18 WNW RMY N/A  01/19 Low temp since midnight is 25F; normal low is 17F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 19 HIGH 59F IN 1973 LOW -11F IN 1887 PRECIP 2.34 INS. IN 1936 SNOWFALL 10.5 INS. IN 1936 PEAK GUST 93e MPH WNW IN 1943 RECORDS FOR JANUARY 20 HIGH 59F IN 1951 LOW -9F IN 1901 PRECIP 1.95 INS. IN 1978 SNOWFALL 19.0 INS. IN 1978  PEAK GUST 76e MPH NE IN 1978 TODAY'S REPORT PREPARED BY: Nate Iannuccillo