BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, DECEMBER 30, 2019 ALL TIMES ARE IN EASTERN STANDARD TIME A MIXED BAG OF WINTRY WEATHER ENDS THE DRY STRETCH.... The stretch of consecutive days without measurable precipitation came to an end overnight at 11 days! Rain overspread the area last evening and continued into this morning before mixing with and changing over to sleet and snow. Total liquid equivalent of precipitation was 0.48" ending at 7 A.M. this morning. There was no frozen precipitation prior to 7 A.M. Total sleet/snow accumulation at 1 P.M. was 0.4", the total liquid equivalent for the 6 hours ending at 1 P.M. is 0.45". The storm total so far is 0.93". Also of note was the rapid increase in wind this morning. A peak gust so far today is 35 knots (40 mph) out of the East, occuring at 9:52 A.M. We haven't had much range in temperature so far today with a high that occurred around 8 A.M. this morning of 35F, which is exactly normal for the day. The low since midnight is 32F, which is 13 degrees above the normal minimum of 20F. Today's Observations: 7 A.M. Weather: Overcast stratus fractus, light rain Temperature: 34F; Dew Point: 34F; Wind: E at 14G23 kts Sea-level pressure: 30.03 ins. Hg, falling, then more slowly Visibility: 1 mile, fog 6-hr Max temp: 34F 6-hr Min temp: 32F 24-hr Precip:  0.48 ins. 24-hr Snowfall: 0.0 ins. Snow Depth: 0 ins. BHO SA 1155 E2 OVC 1R-F 168/34/34/0814G23/003/ STRAFRA OCCLY DRFTG OVR SMT/ 8/7// 57021 6/// 70048 10034 20032 10 A.M. Weather: Overcast stratus fractus, light sleet and rain Temperature: 33F; Dew Point: 33F; Wind: E at 23G35 kts Sea-level pressure: 30.02 ins. Hg, steady, then falling Visibility: 2 miles, fog 3-hr Precip:  0.24 ins. 3-hr Snowfall: Trace. BHO SA 1455 E3 OVC 2IP-R-F 167/33/33/0823G35/002/ STRAFRA OCCLY DRFTG OVR SMT PK WND 0835/52/ TOTAL NEW SLEET LAST 3 HRS TRACE/ 8/7// 55001 6024 1 P.M. Weather: Overcast stratus fractus, light sleet and snow Temperature: 32F; Dew Point: 32F; Wind: E at 18G28 kts Sea-level pressure: 29.99 ins. Hg, falling, then more slowly Visibility: 2 miles, fog 6-hr Max temp: 35F 6-hr Min temp: 32F 6-hr Precip:  0.45 ins. 6-hr Snowfall: 0.4 ins. Snow Depth: Trace BHO SA 1755 E2 OVC 2IP-S-F 157/32/32/0818G28/999/ STRAFRA OCCLY DRFTG OVR SMT PK WND 0830/42/ TOTAL NEW SLEET/SNOW LAST 6 HRS 0.4 INS/ 8/7// 4/000 56010 6045 10035 20032 SUMMARY FOR SUNDAY, DECEMBER 29, 2019 TEMPERATURE (DEGREES F) MAX.....42   NORMAL.....35 MIN.....28   NORMAL.....20 MEAN....35   NORMAL.....27 DEPARTURE FROM 30-YEAR NORMAL..................... +8 TOTAL DEPARTURE FOR THE MONTH.....................+11 [+0.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............30  DEPARTURE....... -8 TOTAL HEATING UNITS FOR THE MONTH..............954  DEPARTURE.......-13 TOTAL HEATING UNITS FOR THE SEASON............2191  DEPARTURE.......-38 TOTAL HEATING UNITS LAST SEASON TO DATE.......2228  DEPARTURE.......-37 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY....................22 WNW AT  12:26 A.M.                      AERO.........................21 WNW AT  12:46 A.M.                      ASOS.........................22 WNW AT  12:25 A.M.                    DAVIS........................23 W   AT  12:02 A.M. RMY 23 FASTEST MILE FOR YESTERDAY......................17 WNW AT  12:36 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...................16 NW  AT   3:25 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..................17 W   AT  12:04 A.M. AVERAGE WIND SPEED AND DIRECTION.............. 7.5 NW                                      ASOS....................... 7.6                    DAVIS...................... 7.8 WNW [302 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.48  DEPARTURE......+0.34                          ASOS..............0.46 TOTAL PRECIPITATION FOR THE MONTH..........6.54  DEPARTURE......+1.93                          ASOS..............6.97 TOTAL PRECIPITATION FOR THE YEAR..........55.62  DEPARTURE......+2.47                          ASOS.............56.37 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.......-0.5 TOTAL SNOWFALL FOR THE MONTH...............19.1  DEPARTURE.......+6.7 TOTAL SNOWFALL FOR THE SEASON..............19.2  DEPARTURE.......+4.2 PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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 12/01  32/16/24/-13/..../5.8/011/02           33 ENE AERO 32 ENE RMY N/A 12/02  37/25/31/-5/..../2.7/000/00            52 NE  AERO 47 NE  RMY 53 12/03  30/23/27/-9/..../4.6/000/00            32 N   AERO 35 N   RMY 36 12/04  34/22/28/-7/..../0.0/000/00            23 WNW AERO 23 NNW RMY N/A 12/05  41/26/34/-1/..../0.0/343/62            33 NW  AERO 35 NW  RMY 37 12/06  33/23/28/-7/0.02/0.1/000/00            25 NW  AERO 23 NW  RMY 29 12/07  31/18/25/-9/0.00/0.0/519/94            25 NW  AERO 23 NW  RMY N/A 12/08  36/15/26/-8/0.00/0.0/.../..            31 SSW AERO 32 SSW RMY N/A 12/09  57/36/47/+13/..../0.0/.../..           53 S   AERO 52 S   RMY 54 12/10  58/37/48/+15/..../0.0/.../..           35 SW  AERO 39 SW  RMY N/A 12/11  36/23/30/-3/..../3.0/.../..            25 NW  AERO 25 NW  RMY N/A 12/12  29/17/23/-10/..../1.8/.../..           29 W   AERO 30 W   RMY 25 12/13  46/22/34/+2/..../0.0/.../..            25 SSE AERO 25 SSE RMY N/A 12/14  58/46/52/+20/..../0.0/.../..           45 S   AERO 41 S   RMY N/A 12/15  48/28/38/+6/0.00/0.0/.../..            53 W   AERO 53 W   RMY 50 12/16  30/25/28/-3/0.00/0.0/.../..            36 W   AERO 36 W   RMY N/A 12/17  35/23/29/-2/..../1.0/.../..            22 NNW AERO 21 NE  RMY 23 12/18  33/18/26/-5/.../0.0/.../..             44 WNW AERO 45 WNW RMY N/A 12/19  20/9/15/-15/.../0.0/.../..             51 W   AERO 47 W   RMY N/A 12/20  29/11/20/-10/0.00/0.0/..../..          32 W   AERO 30 W   RMY 29 12/21  31/16/24/-6/0.00/0.0/..../..           16 SSE AERO 15 SSE RMY N/A 12/22  40/26/33/+4/0.00/0.0/..../..           23 SW  AERO 21 SW  RMY 23 12/23  54/33/44/+15/0.00/0.0/..../..          30 WSW AERO 30 SW  RMY 30 12/24  42/29/36/+7/0.00/0.0/..../..           30 NW  AERO 27 NW  RMY 30 12/25  42/25/34/+6/0.00/0.0/..../..           16 NNE AERO 16 N   RMY N/A 12/26  39/29/34/+6/0.00/0.0/..../..           22 ENE AERO 20 ENE RMY 22 12/27  47/31/39/+11/0.00/0.0/..../..          32 SSW AERO 30 SSW RMY 34 12/28  47/30/39/+11/0.00/0.0/..../..          23 W   AERO 22 W   RMY N/A 12/29  42/28/35/+8/..../0.0/..../..           22 WNW AERO 21 WNW RMY 23 12/30 The low since midnight is 32F, daily normal minimum is 20F DAILY RECORDS FOR DECEMBER 12/01/19: DAILY RECORD SNOWFALL OF 5.8 INS.,           BREAKS PREVIOUS RECORD OF 2.0 INS. SET IN 1902. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR DECEMBER 30 HIGH 60 IN 1984 LOW -18 IN 1933 PRECIP 1.48 INS. IN 1891 SNOWFALL 7.5 INS. IN 1956 PEAK GUST 81 MPH WNW IN 1962 RECORDS FOR DECEMBER 31 HIGH 62 IN 1965 LOW -12 IN 1917 PRECIP 0.96 INS. IN 1906 SNOWFALL 7.5 INS. IN 2008 PEAK GUST 78 MPH NW IN 1990 TODAY'S REPORT PREPARED BY: Matt Douglas