BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, JANUARY 3, 2014 ALL TIMES ARE IN EASTERN STANDARD TIME SNOW, BLOWING SNOW, AND FOG END MID MORNING LEAVING STORM TOTALS OF 15.6 INCHES OF SNOW WITH A LIQUID CONTENT OF 1.37 INCHES OF WATER. OVERNIGHT LOW OF -1F COMES CLOSE BUT UNABLE TO DEFEAT TODAY'S RECORD LOW OF -4F. Temperatures have rebounded somewhat after a chilly and snowy overnight. Plenty of blowing snow has scoured out the snow cover on some areas on the summit while building drifts in excess of two feet in some areas. THE PRELIMINARY DECEMBER 2013 STATS TEMPERATURE: Deg. F Av. Max. 38.0 Av. Min. 23.7 Mean 30.9 [-0.4] 24-hr. corrected mean: 30.7 Max. temp: 63F on 22nd Min. temp: 7F on 17th Total heating degree day units: 1053 [+10] Total seasonal heating units: 2277 [-28 less than average] [Season starts 7/1 ] Seasonal total this date 2012: 2028 [249 more than last season] PRECIPITATION: Inches Total: 5.27 [+0.38] Greatest in 24 hours: 1.43 (14-15th) Total snowfall: 15.5 [+2.1] * Greatest in 24 hours: 6.8 inches (14-15th) * 1981-2010 average 13.4 WIND Av. speed (uncorrected): 11.9 mph Av. speed (corrected): 12.3 mph Prevailing direction: W 15% SUNSHINE Yet to be determined Available next few days Today's Observations: 7 A.M. Weather: Light snow and fog Temperature: 1F; Dew Point: 1F; Wind: N at 16G28 kts Sea-level pressure: 29.76 ins. Hg, increasing, then more quickly Visibility: 1/2 mile 6-hr. min temp: -1F 24-hour precipitation: 1.24 inches 24-hour snowfall: 14.0 inches BHO SA 1155 W4 X 1/2S-F 079/01/01/3516G28/976/ ONCL MDT SNW SNW PST 24 HRS 14.0 STORM TOTAL 14.9 PK WND 3531/33/ 8//// 4/015 53027 ASOS 60034 ASOS 70140 MANUAL 70124 10024 21001 10 A.M. Weather: Light snow, fog and drifting snow Temperature: 8F; Dew Point: 4F; Wind: NNW at 14G24 kts, Sea-level pressure: 29.87 ins. Hg, steady, then increasing Visibility: 1 mile BHO SA 1455 W5 X 1S-F 116/08/04/3414G24/987/ SUN DMLY VSB/ 8//// 53037 ASOS 60007 1 P.M. Weather: Scattered stratocumulus, broken cirrostratus/cirrocumulus, few cumulus fractus. Temperature: 11F; Dew Point: 07F; Wind: NNW at 12 kts Sea-level pressure: 29.96 ins. Hg, rising, then more quickly Visibility: 60 miles, haze distant ENE-SE 6-hr max. temp: 11F 6-hour precipitation: 0.05 inch 6-hour snowfall: 0.7 inch BHO SA 1755 10 SCT 120 BKN 60 144/11/07/3312/996/ CURFRA ALQDS VSBY ENE-SE 35 DSNT HZ NEW SNW PAST 6 HRS 0.7 STORM TOTAL 15.6/ 8/1/7 53028 ASOS 60007 MANUAL 60005 10011 20001 WEATHER SUMMARY FOR THURSDAY, JANUARY 2, 2014 TEMPERATURE (DEGREES F) MAX.....24 NORMAL.....35 MIN......0 NORMAL.....19 MEAN....12 NORMAL.....27 DEPARTURE FROM 30-YEAR NORMAL.......................-15 TOTAL DEPARTURE FOR THE MONTH.......................-21 [-10.5 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............53 DEPARTURE........ +15 TOTAL HEATING UNITS FOR THE MONTH..............97 DEPARTURE.........+20 TOTAL HEATING UNITS FOR THE SEASON...........2374 DEPARTURE..........-7 TOTAL HEATING UNITS LAST SEASON TO DATE......2111 DIFFERENCE.......+263 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................39 NNE AT 11:11 A.M. AERO.......................39 NNE AT 11:11 A.M. ASOS.......................43 NE AT 11:12 A.M. DAVIS......................39 NE AT 11:11 A.M. RMY 39 FASTEST MILE FOR YESTERDAY....................26 N AT 21:35 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................26 N AT 21:37 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................24 N AT 21:37 P.M. AVERAGE WIND SPEED AND DIRECTION..............15.2 N ASOS.......................14.7 N DAVIS......................13.2 NNE PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....1.24 DEPARTURE.............+1.10 ASOS..............1.40 TOTAL PRECIPITATION FOR THE MONTH..........1.30 DEPARTURE.............+1.21 ASOS..............1.47 TOTAL PRECIPITATION FOR THE YEAR...........1.30 DEPARTURE.............+1.21 ASOS..............1.47 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.......14.0 DEPARTURE.............+13.5 TOTAL SNOWFALL FOR THE MONTH.............14.9 DEPARTURE.............+13.8 TOTAL SNOWFALL FOR THE SEASON............20.8 DEPARTURE.............+14.1 PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 2013 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust RMY: RMY = R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 12/1 45/30/38/+1/0.28/T/000/00 22 SSE AERO 23 MPH SSE RMY 23 12/2 38/34/36/0/T/0.0/000/00 15 NW AERO 15 MPH NW RMY 16 12/3 45/32/39/+3/0.00/0.0/284/51 18 NNW AERO 18 MPH NNW RMY 20 12/4 43/29/36/+1/0.00/0.0/389/70 21 WNW AERO 21 MPH WNW RMY 21 12/5 53/38/46/+11/0.02/0.0/000/00 36 S AERO 40 MPH S RMY 39 12/6 55/33/44/+9/0.38/T/000/00 25 SSW AERO 28 MPH SSW RMY N/A 12/7 40/26/33/-1/0.12/T/287/52 23 NW AERO 25 MPH NW RMY N/A 12/8 30/22/26/-8/T/T/039/07 25 NW AERO 27 MPH NW RMY N/A 12/9 41/25/33/-1/0.35/0.6/000/00 28 E AERO 28 MPH E RMY 24 12/10 33/21/27/-6/0.14/2.1/000/00 28 W AERO 28 MPH W RMY 28 12/11 28/19/24/-9/0.00/0.0/345/63 27 SW AERO 28 MPH SW RMY 27 12/12 23/14/19/-14/0.00/0.0/542/99 28 WNW AERO 31 MPH NW RMY 30 12/13 28/14/21/-11/0.00/0.0/405/74 31 W AERO 32 MPH W RMY 33 12/14 28/9/19/-13/0.45/4.8/000/00 30 E AERO 26 MPH E RMY N/A 12/15 36/21/29/-3/0.98/2.0/000/00 48 NE AERO 50 MPH NE RMY 51 12/16 27/14/21/-10/0.00/0.0/529/97 36 W AERO 37 MPH W RMY N/A 12/17 23/7/15/-16/0.53/5.5/104/19 28 N AERO 30 MPH N RMY 28 12/18 32/15/24/-7/0.00/0.0/436/80 29 WNW AERO 30 MPH NW RMY 29 12/19 42/22/32/+2/0.00/0.0/425/78 38 SW AERO 44 MPH SW RMY 42 12/20 52/34/43/+13/0.00/0.0/332/61 26 SSW AERO 29 MPH SSW RMY 29 12/21 58/42/50/+20/0.00/0.0/082/15 28 SSW AERO 29 MPH SSW RMY 30 12/22 63/35/49/+20/0.01/0.0/000/00 37 SW AERO 41 MPH SW RMY 41 12/23 37/32/35/+6/0.73/0.0/000/00 24 NW AERO 25 MPH NW RMY 25 12/24 36/25/31/+2/T/T/142/26 25 NW AERO 12/25 25/13/19/-9/0.00/0.0/480/88 29 NW AERO 30 MPH WNW RMY 30 12/26 35/19/27/-1/0.05/0.5/000/00 24 W AERO 25 MPH W RMY 25 12/27 32/22/27/-1/0.00/0.0/344/63 25 W AERO 25 MPH W RMY 26 12/28 46/25/36/+8/0.00/0.0/300/55 30 WSW AERO 32 MPH SW RMY 32 12/29 42/34/38/+11/1.23/0.0/000/00 36 NNE AERO 37 MPH NNE RMY 38 12/30 39/17/28/+1/0.00/0.0/071/13 38 W AERO 39 MPH W RMY 36 12/31 24/11/19/-9/0.00/0.0/236/43 30 W AERO 31 MPH W RMY 30 1/1 26/16/21/-6/0.00/0.0/.../.. 25 W AERO 25 MPH W RMY 27 1/2 24/00/12/-15/..../../000/00 39 NNE AERO 39 MPH NNE RMY 39 DAILY RECORDS FOR DECEMBER 2013 12/22- NEW DAILY RECORD MAXIMUM TEMPERATURE OF 63F; surpasses previous record of 62F set in 1994 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 3 HIGH 64F IN 2000 LOW -4F IN 1904 PRECIP 1.93 INS. IN 1999 SNOW 11.3 INS. 1996 PEAK GUST 92 MPH S IN 1960 RECORDS FOR JANUARY 4 HIGH 60F IN 2000 LOW -8F IN 1904, 1981 PRECIP 1.79 INS. IN 1982 SNOW 8.6 INS. 1923, 1941 PEAK GUST 84 MPH S IN 1982 TODAY'S REPORT PREPARED BY: Brian Fitzgerald