BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JANUARY 23, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME INCREASING CLOUDS AND A SOUTHWESTERLY BREEZE WITH A TEMPERATURE INCREASE.... Almost clear skies this morning were overcast by the 1 P.M. observation. Visibility was limited due to a distant haze this morning, increasing from 30 miles to 65 miles during its dissipation. Impressively, the observatory still has two inches of snow depth from the event that happened 4 days ago; despite abundant sunshine in the five days prior. A consistent southwesterly wind signals the approach of a warm air mass, boosting temperatures above seasonal averages. The high so far today is 43F, 9 degrees above the normal high of 34F. The low since midnight is 24F, this is 7 degrees above the normal low of 17F. Today's Observations: 7 A.M. Weather: Scattered cirrostratus Temperature: 28F; Dew Point: 15F; Wind: SSW at 13 kts Sea-level pressure: 30.38 ins. Hg, rising, then more rapidly Visibility: 30 miles, hazy 6-hr Max temp: 30F 6-hr Min temp: 24F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. Snow depth: 2 ins. BHO SA 1155 250 SCT 30 287/28/15/2113/038/ HAZY/ 8/008 4/002 53011 10030 20024 10 A.M. Weather: Broken cirrus Temperature: 34F; Dew Point: 17F; Wind: SW at 10 kts Sea-level pressure: 30.39 ins. Hg, rising, then more slowly Visibility: 35 miles, hazy 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 E250 BKN 35 291/34/17/2010/039/ HAZY/ 8/002 53004   1 P.M. Weather: Overcast cirrostratus Temperature: 43F; Dew Point: 9F; Wind: WSW at 7 kts, Sea-level pressure: 30.33 ins. Hg, falling, then more slowly Visibility: 65 miles 6-hr Max temp: 43F 6-hr Min temp: 26F 6-hr Precip:  0.00 ins. 6-hr Snowfall: 0.0 ins. Snow depth: 2 ins BHO SA 1755 E250 OVC 65 273/43/9/2507/033/ 8/008 4/002 58018 10043 20026 SUMMARY FOR WEDNESDAY, JANUARY 22, 2020 TEMPERATURE (DEGREES F) MAX.....34   NORMAL.....34 MIN.....13   NORMAL.....17 MEAN....24   NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL..................... -1 TOTAL DEPARTURE FOR THE MONTH....................+157 [+6.9 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............41  DEPARTURE....... +1 TOTAL HEATING UNITS FOR THE MONTH..............714  DEPARTURE......-155 TOTAL HEATING UNITS FOR THE SEASON............2965  DEPARTURE......-208 TOTAL HEATING UNITS LAST SEASON TO DATE.......3154  DEPARTURE......-189 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................16 SW  AT  11:35 P.M.                      AERO.........................16 SW  AT  11:35 P.M.                      ASOS.........................16 S   AT  10:19 P.M.                    DAVIS........................16 SSW AT  10:21 P.M. RMY N/A FASTEST MILE FOR YESTERDAY......................14 WNW AT  11:34 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................14 SW  AT  11:58 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................14 SW  AT  11:38 P.M. AVERAGE WIND SPEED AND DIRECTION...............6.8 WNW                                    ASOS........................6.8                    DAVIS.......................7.2 WNW [259 deg.] 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..........0.89  DEPARTURE......-2.23                          ASOS..............0.92 TOTAL PRECIPITATION FOR THE YEAR...........0.89  DEPARTURE......-2.23                          ASOS..............0.92 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M......... 0.0  DEPARTURE.......-0.6 TOTAL SNOWFALL FOR THE MONTH............... 4.2  DEPARTURE.......-8.1 TOTAL SNOWFALL FOR THE SEASON..............24.2  DEPARTURE.......-4.1 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 01/01  38/30/34/+7/..../0.0/..../..           39 W   AERO 38 W   RMY 41 01/02  46/29/38/+11/0.00/0.0/..../..          28 SW  AERO 28 SW  RMY 30 01/03  46/40/43/+17/0.00/0.0/..../..          21 SW  AERO 18 SW  RMY N/A 01/04  46/36/41/+15/..../0.0/..../..          16 NNW AERO 16 NNW RMY N/A 01/05  36/24/30/+4/..../0.5/..../..           43 NW  AERO 46 NW  RMY 43 01/06  33/23/28/+2/T/T/..../..                26 W   AERO 21 W   RMY N/A 01/07  38/29/34/+8/..../0.4/.../..            30 WSW AERO 28 WSW RMY N/A 01/08  39/22/31/+5/..../0.4/.../..            50 W   AERO 46 WNW RMY 47 01/09  28/16/22/-4/..../0.0/.../..            43 WNW AERO 40 WNW RMY N/A 01/10  48/23/36/11/T/..../0.0/.../..          37 SW  AERO 37 SW  RMY 39 01/11  65/46/56/+31/..../0.0/.../..           53 SSW AERO 53 SSW RMY N/A           01/12  68/36/52/+27/..../0.0/.../..           60 SSW AERO 62 SSW RMY N/A 01/13  39/31/35/+10/0.01/T/.../..             21 NE  AERO 20 NE  RMY N/A 01/14  38/31/35/+10/0.01/0.0/.../..           16 W   AERO 15 W   RMY N/A 01/15  48/35/42/+17/0.00/0.0/.../..           24 W   AERO 23 W   RMY 24 01/16  42/24/33/+8/0.06/T/.../..              54 W   AERO 52 W   RMY 59     01/17  24/10/17/-8/0.00/0.0/..../..           50 NW  AERO 48 NW  RMY N/A 01/18  28/8/18/-7/0.35/2.8/..../..            28 WSW AERO 24 ESE RMY N/A 01/19  40/21/31/+6/0.02/0.2/..../..           44 W   AERO 44 W   RMY 42 01/20  26/12/19/-6/0.00/0.0/..../..           33 NW  AERO 32 NW  RMY N/A 01/21  24/10/17/-8/0.00/0.0/..../..           22 NW  AERO 21 NW  RMY N/A 01/22  34/13/24/-1/0.00/0.0/..../..           16 SW  AERO 16 SW  RMY N/A 01/23 The low since midnight is 24F, daily normal minimum is 17F DAILY RECORDS FOR JANUARY 1/11/20: DAILY RECORD MAXIMUM TEMPERATURE OF 65F,           BREAKS PREVIOUS RECORD OF 60F SET IN 1975. 1/11/20: DAILY RECORD HIGH MINIMUM TEMPERATURE OF 46F,           BREAKS PREVIOUS RECORD OF 40F SET IN 1983. 1/12/20: DAILY RECORD MAXIMUM TEMPERATURE OF 68F,           BREAKS PREVIOUS RECORD OF 60 SET IN 2018.          TIES HIGHEST MAXIMUM FOR JANUARY,           ADDITIONAL 68F ON 1/26/1950. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR JANUARY 23 HIGH 62F IN 1906 LOW -10F IN 1976 PRECIP 2.40 INS. IN 1935 SNOWFALL 14.6 INS. IN 1966 PEAK GUST 85 MPH S IN 1992 RECORDS FOR JANUARY 24 HIGH 60F IN 1967 LOW -12F IN 1907 PRECIP 2.04 INS. IN 1998 SNOWFALL 11.3 INS. IN 1935 PEAK GUST 82 MPH S IN 1996 TODAY'S REPORT PREPARED BY: Benjamin Turner