BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, FEBRUARY 1, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME COLD, DRY CONDITIONS PERSIST... Temperatures continue to remain well below average, with last night's low reaching 5 F at 7 A.M. this morning.  24 hours prior, yesterday's low temperature of -2 F concluded the cooling  trend of the past few days.  Temperatures are still well below seasonal averages, but today's sustained westerly winds likely means an end to cold air cycling in from the northwest.  High station  pressure continues to enforce an absence of thick, dense clouds, and also providing decent visibility throughout today. Skies have  remained relatively clear with cirroform clouds dominating the  observable sky for most of the day.  Despite the recent cold spell,  the month of January has finished out both warmer and wetter than  average, with precipitation totals an inch above average.  Snowfall  totals continue to remain far below seasonal expectations.    Today's Observations: 7 A.M. Weather: Few cirrocumulus, few distant altocumulus NE-SE Temperature: 5F; Dew Point: -10F; Wind: W at 12G18 kts Sea-level pressure: 30.37 ins. Hg, rising, then more quickly Visibility: 45 miles 6-hr Max temp: 7F 6-hr Min temp: 5F 24-hr Precip: 0.00 ins. 24-hr snowfall: 0.0 ins. Snow depth: Trace  BHO SA 1155 CLR 45 283/5/-10/2712G18/037/  FEW CC FEW DSNT AC NE-SE/ 8/089 53010 10007 20005 10 A.M. Weather: Broken cirrostratus, few cirrocumulus, few cirrus Temperature: 12F; Dew Point: -4F; Wind: W at 10G17 kts Sea-level pressure: 30.39 ins. Hg, rising steadily Visibility: 70 miles 3-hr Precip: 0.00 ins. BHO SA 1455 E250 BKN 70 291/12/-4/2810G17/039/  FEW CC FEW CI/ 8/008/ 51008 1 P.M. Weather: Broken cirrostratus, few cirrocumulus Temperature: 17F; Dew Point: 0F; Wind: W at 10G21 kts Sea-level pressure: 30.32 ins. Hg, increasing, then decreasing Visibility: 70 miles 6-hr Max temp: 18F 6-hr Min temp: 5F 6-hr Precip:  0.00 ins. 6-hr snowfall: 0.0 ins.  Snow depth: Trace BHO SA 1755 E250 BKN 70 267/17/0/2710G21/032/  FEW CC/ 8/008/ 58024 10018 20005 SUMMARY FOR THURSDAY, JANUARY 31, 2019  TEMPERATURE (DEGREES F) MAX.....14   NORMAL.....34 MIN.....-2   NORMAL.....17 MEAN.....6   NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL.......................-20 TOTAL DEPARTURE FOR THE MONTH.......................+27 [+0.7 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............59   DEPARTURE........+19 TOTAL HEATING UNITS FOR THE MONTH............1120   DEPARTURE........-26 TOTAL HEATING UNITS FOR THE SEASON...........3491   DEPARTURE........-35 TOTAL HEATING UNITS LAST SEASON TO DATE..3321  DIFFERENCE......+175 PEAK GUST AND AVERAGE WIND SPEED (MPH)  PEAK WIND GUST FOR YESTERDAY....................33 WNW AT 12:07 A.M.                    AERO.........................35 WNW AT 12:10 A.M.                    ASOS.........................34 W   AT 12:08 A.M.                     DAVIS........................34 W   AT 12:07 A.M. RMY N/A FASTEST MILE FOR YESTERDAY......................26 W   AT  9:03 A.M.  MAXIMUM 2-MINUTE ASOS AVERAGE...................25 WNW AT 12:13 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................27 W   AT  9:06 A.M. AVERAGE WIND SPEED AND DIRECTION..............14.8 W                                                     ASOS.......................14.5                                                     DAVIS......................15.5 W [272 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..........5.35  DEPARTURE.......+1.00                          ASOS..............5.48 TOTAL PRECIPITATION FOR THE YEAR...........5.35  DEPARTURE.......+1.00                          ASOS..............5.48 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........-0.5 TOTAL SNOWFALL FOR THE MONTH................4.7  DEPARTURE.......-12.4 TOTAL SNOWFALL FOR THE SEASON..............12.4  DEPARTURE.......-20.7 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/..../0.0/386/72         53 W   AERO 53 W   RMY 54 01/02 34/24/29/+2/..../.../432/81          22 NW  AERO 22 NW  RMY N/A 01/03 42/28/35/+9/0.01/T/228/43            28 WNW AERO 30 WNW RMY 30 01/04 43/30/37/+11/..../.../354/66         29 SW  AERO 29 SW  RMY 29 01/05 41/32/37/+11/1.19/000/000/00        26 NE  AERO 25 NNW RMY 27 01/06 42/21/32/+6/0.00/0.0/300/56          42 NW  AERO 46 NW  RMY 50 01/07 26/14/20/-6/.../.../474/88           37 NW  AERO 41 NW  RMY N/A 01/08 40/24/32/+6/.../.../000/00           24 SSE AERO 23 SSE RMY N/A 01/09 42/31/37/+11/.../.../084/16          44 W   AERO 46 WNW RMY 45 01/10 32/20/26/+1/T/T/090/17               37 NW  AERO 41 NW  RMY 43 01/11 26/12/19/-6/0.00/0.0/366/68          36 WNW AERO 37 WNW RMY 38 01/12 26/9/18/-7/0.00/0.0/486/89           32 NW  AERO 32 NW  RMY 29 01/13 25/11/18/-7/0.00/0.0/456/84          18 NNW AERO 16 NW  RMY N/A 01/14 27/20/24/-1/0.00/0.0/120/22          20 NNE AERO 17 N   RMY N/A 01/15 34/18/26/1/0.00/0.0/402/73          22 NW  AERO 21 NNW RMY N/A 01/16 34/23/29/+4/0.00/0.0/270/47          33 W   AERO 32 W   RMY 35 01/17 27/13/20/-5/0.00/0.0/480/87          30 NNW AERO 28 NW  RMY N/A 01/18 40/21/31/+6/0.00/0.0/156/28          18 WNW AERO 18 WNW RMY N/A  01/19 31/24/28/+3/.../1.6/198/36           30 E   AERO 30 E   RMY N/A 01/20 33/3/18/-7/.../.../000/00            39 ENE AERO 43 ENE RMY 39 01/21 3/-2/1/-24/0.00/0.0/348/62           32 WNW AERO 41 WNW RMY M 01/22 24/0/12/-13/0.00/0.0/.../..          28 NW  AERO 30 NW  RMY 29 01/23 46/15/31/+6/0.00/0.0/.../..          37 SSW AERO 39 SSW RMY N/A 01/24 57/31/44/+19/1.44/0.0/.../..         77 S   AERO 79 S   RMY N/A 01/25 37/23/30/+5/0.00/0.0/.../..          41 WNW AERO 46 WNW RMY N/A 01/26 33/17/25/0/0.00/0.0/.../..           25 W   AERO 25 W   RMY 27         01/27 44/24/34/+9/0.00/0.0/.../..          39 S   AERO 39 S   RMY 41 01/28 30/19/28/+3/..../.../.../..          28 NW  AERO 28 NW  RMY N/A 01/29 32/19/26/+1/..../.../.../..          22 SE  AERO 21 E   RMY N/A 01/30 36/3/20/-6/..../0.5/.../..           52 W   AERO 53 W   RMY 57  01/31 14/-2/6/-20/0.00/0.0/.../..          33 WNW AERO 35 WNW RMY N/A 02/01 Low temp since midnight is 5F; normal low is 17F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): 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 RECORDS FOR FEBRUARY 2 HIGH 55F IN 1951, 1973 LOW -12F IN 1961 PRECIP 1.91 INS. IN 1999 SNOWFALL 16.5 INS. IN 2015 PEAK GUST 92 MPH SW IN 1970 TODAY'S REPORT PREPARED BY: Nate Iannuccillo