BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, JANUARY 19, 2014 ALL TIMES ARE IN EASTERN STANDARD TIME HEAVY WET SNOW TOTALING 4.2 INCHES COVERS GREAT BLUE HILL FOLLOWING YESTERDAY'S DAY TIME STORM. Yesterday a storm intensified off the Atlantic coast bringing rain followed by heavy wet snow which fell at the rate of more than 1 inch per hour early yesterday afternoon. Including the light rain that fell prior to the snow, total liquid equivalent for the 0700 yesterday to 0700E period today was 0.81 inches of water. With about 0.6 inches of this falling as snow, this indicates a water-heavy snow-to-liquid ratio of approximately 7.5:1. Low clouds, fog and a few snow showers added an additional coating to an already white ground by mid morning today. By early afternoon sun and winds were both on the increase ahead of a much cooler week to come. Yesterday's daily temperature departure marks the first time in a week that the departure has been less than +10 degrees (9 degrees for Saturday with an average temperature of 34 degrees). Saturday's normal daily average temperature is 25 degrees. Today's Observations: 7 A.M. Weather: Overcast stratus, few stratocumulus below summit ENE-SE, thin fog, light glazing Temperature: 28F; Dew Point: 27F; Wind: WSW at 8 kts Sea-level pressure: 29.71 ins. Hg, decreasing, then increasing Visibility: 10 miles, 5 miles ENE-SE with snow showers distant 6-hr. min temp: 28F 24-hr. Snowfall: 4.2 inches 24-hr. precipitation: 0.81 inches BHO SA 1155 E5 OVC 10 060/28/27/2408/971/ FEW SC BBLO STA ENE-SE LIMITING VSBY TO 5 MI LGT FG LGT GLZ TOTAL NEW SNOW PST 24 HOURS 4.2 IN/ 8/4// 4/004 55002 ASOS 70080 MANUAL 70081 10030 20028 10 A.M. Weather: Light snow, overcast nimbostratus Temperature: 27F; Dew Point: 26F; Wind: SSW at 13 kts, Sea-level pressure: 29.68 ins. Hg, falling, then more quickly Visibility: 9 miles BHO SA 1455 E4 OVC 9S- 052/27/26/2113/968/ BINOVC LGT FG/ 8/4// 58008 6000/ 1 P.M. Weather: Scattered cumulus, broken cirrocumulus Temperature: 28F; Dew Point: 26F; Wind: SW at 14G25 kts, Sea-level pressure: 29.59 ins. Hg, falling, then more quickly Visibility: 25 miles 6-hr max. temp: 30F 6-hr min. temp: 27F 6-hr snowfall: 0.5 inches BHO SA 1755 20 SCT E250 BKN 25 021/28/26/2214G25/959/ NEW SNW PST 6 HRS 0.5 IN/ 8/107 58031 ASOS 60003 MANUAL 60003 10030 20027 WEATHER SUMMARY FOR SATURDAY, JANUARY 18, 2014 TEMPERATURE (DEGREES F) MAX.....37 NORMAL.....33 MIN.....30 NORMAL.....17 MEAN....34 NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL........................+9 TOTAL DEPARTURE FOR THE MONTH.......................+56 [+2.9 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............31 DEPARTURE..........-9 TOTAL HEATING UNITS FOR THE MONTH.............653 DEPARTURE.........-55 TOTAL HEATING UNITS FOR THE SEASON...........2930 DEPARTURE.........-82 TOTAL HEATING UNITS LAST SEASON TO DATE......2602 DIFFERENCE.......+328 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................18 E AT 10:18 A.M. AERO.......................17 E AT 10:17 A.M. ASOS.......................20 E AT 10:18 A.M. DAVIS......................18 N AT 2:30 A.M. RMY 18 FASTEST MILE FOR YESTERDAY....................13 E AT 10:18 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................15 E AT 10:18 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................14 E AT 8:15 A.M. AVERAGE WIND SPEED AND DIRECTION.............7.2 E ASOS......................8.1 DAVIS.................... 6.8 NNE [20 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.81 DEPARTURE.............+0.68 ASOS..............0.80 TOTAL PRECIPITATION FOR THE MONTH..........4.13 DEPARTURE.............+1.56 ASOS..............4.52 TOTAL PRECIPITATION FOR THE YEAR...........4.13 DEPARTURE.............+1.56 ASOS..............4.52 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M........4.2 DEPARTURE..............+3.6 TOTAL SNOWFALL FOR THE MONTH.............20.1 DEPARTURE.............+10.0 TOTAL SNOWFALL FOR THE SEASON............35.8 DEPARTURE..............+9.7 PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2014 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 1/1 26/16/21/-6/0.00/0.0/505/92 25 W AERO 25 MPH W RMY 27 1/2 24/00/12/-15/0.97/10.9/000/00 39 NNE AERO 39 MPH NNE RMY 39 1/3 12/-3/05/-21/0.38/4.7/270/49 36 N AERO 39 MPH N RMY 34 1/4 25/-4/11/-15/0.00/0.0/545/99 35 SSW AERO 37 MPH SSW RMY 38 1/5 42/23/33/+07/0.08/0.0/259 47 30 SE AERO 32 MPH SE RMY 42 1/6 57/25/41/+15/0.29/0.0/006/01 41 S AERO 46 MPH S RMY 48 1/7 25/06/16/-10/0.00/0.0/555/100 44 WNW AERO 46 MPH WNW RMY 42 1/8 21/3/12/-14/0.00/0.0/550/99 28 WSW AERO 29 MPH WSW RMY N/A 1/9 28/13/21/-5/0.00/0.0/540/97 23 WNW AERO 24 MPH WNW RMY 27 1/10 37/17/27/+2/0.05/0.3/000/00 17 SSW AERO 18 MPH SW RMY N/A 1/11 57/37/47/+22/0.67/0.0/000/00 50 S AERO 59 MPH S RMY 59 1/12 51/32/42/+17/0.04/0.0/286/51 41 W AERO 44 MPH W RMY 42 1/13 50/30/40/+15/0.00/0.0/.../.. 33 S AERO 36 MPH S RMY 37 1/14 49/41/45/+20/0.83/0.0/.../.. 35 S AERO 37 MPH S RMY 32 1/15 46/33/40/+15/0.00/0.0/.../.. 24 W AERO 23 MPH W RMY N/A 1/16 40/34/37/+12/0.00/0.0/.../.. 14 ENE AERO 13 MPH ENE RMY 14 1/17 44/33/39/+14/0.00/0.0/.../.. 21 SW AERO 21 MPH SW RMY 22 1/18 37/30/34/+9/..../.../.../.. 18 E AERO 17 MPH E RMY 18 1/19 morning low temp: 27F; the normal low is now 17F DAILY RECORDS FOR JANUARY 2014 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 19 HIGH 59F IN 1973 LOW -11F IN 1887 PRECIP 2.34 INS. IN 1936 SNOWFALL 10.5 INS. IN 1936 PEAK GUST 93e MPH WNW IN 1943 RECORDS FOR JANUARY 20 HIGH 59F IN 1951 LOW -9F IN 1901 PRECIP 1.95 INS. IN 1978 SNOWFALL 19.0 INS. IN 1978 [RECORD FOR MONTH] PEAK GUST 76e MPH NE IN 1978 TODAY'S REPORT PREPARED BY: Brian Fitzgerald