BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, JANUARY 22, 2020 ALL TIMES ARE IN EASTERN STANDARD TIME A BLUEBIRD DAY WITH LIGHT WESTERLY WINDS.... Today the observatory saw abundant sunshine with slightly limited visibility in the morning hours due to haze. However, visibility increased to 70 miles this afternoon from the 50 miles seen earlier. Wind, though light, shifted southwest after going calm around 9:30 A.M. Cloud cover was negligible at best, with only a few clouds being seen in the distance. The high so far today is 33F, 1 degree below the normal high of 34F. The low since midnight is 13F, this is 4 degrees below the normal low of 17F. Today's Observations: 7 A.M. Weather: Few distant cumulus offshore Temperature: 16F; Dew Point: 8F; Wind: WNW at 7 kts Sea-level pressure: 30.42 ins. Hg, rising, then more rapidly Visibility: 50 miles 6-hr Max temp: 17F 6-hr Min temp: 13F 24-hr Precip:  0.00 ins. 24-hr Snowfall: 0.0 ins. Snow depth: 2 ins. BHO SA 1155 CLR 50 303/16/8/3007/042/ FEW DSNT CU OFFSHR/ 8/100 4/002 53012 10017 20013 10 A.M. Weather: Few cirrostratus Temperature: 25F; Dew Point: 11F; Wind: Calm Sea-level pressure: 30.46 ins. Hg, rising, then more slowly Visibility: 50 miles 3-hr Precip:  0.00 ins. 3-hr Snowfall: 0.0 ins. BHO SA 1455 CLR 50 315/25/11/0000/046/ FEW CS ALQDS WND CALM/ 8/005 51012   1 P.M. Weather: Few cirrostratus Temperature: 32F; Dew Point: 15F; Wind: SW at 6 kts, Wind: Light Sea-level pressure: 30.40 ins. Hg, falling, then more slowly Visibility: 65 miles 6-hr Max temp: 33F 6-hr Min temp: 16F 6-hr Precip:  0.00 ins. 6-hr Snowfall: 0.0 ins. Snow depth: 2 ins BHO SA 1755 CLR 65 296/32/15/2306/040/ FEW CS ALQDS WND LGT/ 8/005 4/002 58019 10033 20016 SUMMARY FOR TUESDAY, JANUARY 21, 2020 TEMPERATURE (DEGREES F) MAX.....24   NORMAL.....33 MIN.....10   NORMAL.....17 MEAN....17   NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL..................... -8 TOTAL DEPARTURE FOR THE MONTH....................+158 [+7.3 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............48  DEPARTURE....... +8 TOTAL HEATING UNITS FOR THE MONTH..............673  DEPARTURE......-155 TOTAL HEATING UNITS FOR THE SEASON............2924  DEPARTURE......-209 TOTAL HEATING UNITS LAST SEASON TO DATE.......3101  DEPARTURE......-177 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................22 NW  AT   2:26 A.M.                      AERO.........................21 NW  AT   2:26 A.M.                      ASOS.........................22 NW  AT   2:27 A.M.                    DAVIS........................23 NW  AT   2:24 A.M. RMY N/A FASTEST MILE FOR YESTERDAY......................15 NW  AT   2:26 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................15 NNW AT   4:11 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................16 NW  AT   2:20 A.M. AVERAGE WIND SPEED AND DIRECTION...............6.7 NW                                    ASOS........................7.0                    DAVIS.......................7.3 NW [320 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.15                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.89  DEPARTURE......-2.09                          ASOS..............0.89 TOTAL PRECIPITATION FOR THE YEAR...........0.89  DEPARTURE......-2.09                          ASOS..............0.89 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M......... 0.0  DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH............... 4.2  DEPARTURE.......-7.5 TOTAL SNOWFALL FOR THE SEASON..............24.2  DEPARTURE.......-3.5 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 The low since midnight is 13F, 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 22 HIGH 59F IN 1916 LOW -8F IN 1888,1976 PRECIP 1.24 INS. IN 1891,1987 SNOWFALL 10.0 INS. IN 2005 PEAK GUST 67 MPH W IN 1976 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 TODAY'S REPORT PREPARED BY: Benjamin Turner