BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, JANUARY 1, 2007 NEW YEARS DAY ALL TIMES ARE IN EASTERN STANDARD TIME HAPPY NEW YEAR! A THIN COATING OF GLAZE FROM LIGHT FREEZING RAIN TEMPERATURES WARMING STEADILY ON INCREASING SOUTHEAST WINDS When precipitation began between 4 and 5 a.m. the temperature was still 32 degrees and the ground was somewhat colder after an overnight low of 30 so we had light freezing rain for a brief time with a thin coating of glaze observed at 7 a.m. Temperatures rose into the mid-30's melting away the glaze by about 9 a.m. DECEMBER 2006 DATA WARMEST DECEMBER ON RECORD! BY ALMOST A DEGREE 1. 38.1 IN 2006 2. 37.3 IN 2001 Av. Max. 45.5 Av. Min. 31.2 Mean 38.4 [+7.2] 24-hour corr. mean temp: 38.1 deg.[for our historical record] High 65/1st Low 17/8th HDD 820 [-220] HDD Season 1873 [-456] CDD 0 CDD Season 641 [+83] Precipitation: 2.24 ins. [-2.32 ] Snowfall: 3.7 ins. [-7.0 ] Sunshine: 7767 corrected mins. or 47% of possible or 1% above the December average Wind: Av. (corrected) 14.0 MPH Prevailing: W 20% Peak gust: 63 MPH S/1st Today's observations: 7 A.M. Weather: Overcast with light rain Temperature: 34F, Dew point: 33F, Wind: ESE at 11 kts Sea-level pressure: 30.18 inches Hg, falling Visibility: 8 miles 6-hourly min. temp. 30 deg. 24-hourly precip: 0.13 in. BHO SA 1155 E15 OVC 8R- 221/34/33/1211/018/ THN GLZ SWLY MELTING/ 8/02/ 55021 MANUAL 6013/ ASOS 60013 ASOS 70013 MANUAL 70013 10034 20030 10 A.M. Weather: Obscurement in heavy fog with light rain Temperature: 38F, Dew point: 38F, Wind: SE at 20g29 kts Sea-level pressure: 30.09 inches Hg, fallingrising Visibility: 1/16 mile 3-hourly rainfall: 0.15 in. BHO SA 1455 W2 X 1/16R-F 191/38/38/1320G29/009/ PK WND 1329/48/ 8//// 58030 MANUAL 6015/ ASOS 60015 WEATHER SUMMARY FOR SUNDAY, DECEMBER 31 TEMPERATURE (DEGREES F) MAX.....37 NORMAL.....35 MIN.....22 NORMAL.....20 MEAN....30 NORMAL.....28 DEPARTURE FROM 30-YEAR NORMAL.........+3 TOTAL DEPARTURE FOR THE MONTH.......+228 [+7.2 DEG/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........35 DEPARTURE......-2 TOTAL HEATING UNITS FOR THE MONTH.........820 DEPARTURE....-220 TOTAL HEATING UNITS FOR THE SEASON.......1873 DEPARTURE....-456 TOTAL HEATING UNITS LAST SEASON TO DATE..2112 DIFFERENCE...-274 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...........25 NW AT 1:17 A.M. AEROVANE............24 WNW AT 4:37 A.M. * ASOS................22 WNW AT 4:36 A.M. DAVIS...............24 WNW AT 12:14 A.M. FASTEST MILE FOR YESTERDAY.............24 WNW AT 9:03 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..........18 WNW AT 4:37 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.........20 WNW AT 12:11 A.M. AVERAGE WIND SPEED AND DIRECTION..... 9.2 WNW ASOS.............. 9.5 DAVIS............. 9.6 W [280 deg] * last of several occurrences.. PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.13 DEPARTURE...... ASOS..............0.13 TOTAL PRECIPITATION FOR THE DEC ..........2.24 DEPARTURE.....-2.32 ASOS..............2.29 TOTAL PRECIPITATION FOR THE YEAR..........60.35 DEPARTURE.....+9.57 ASOS.............59.91 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE..... 0.0 TOTAL SNOWFALL FOR THE DEC..................3.7 DEPARTURE.....-6.6 TOTAL SNOWFALL FOR THE SEASON...............3.7 DEPARTURE.....-9.5 PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 2006......CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 12/1 65/59/62/+26/0.42/0.0/000/00 63 S Aero 65 S 12/2 60/35/48/+12/0/0/0/551/99 47 W Aero 44 W 12/3 44/29/37/+2/0/0/0/506/91 29 S 12/4 38/25/32/-3/0.28/3.2/344/62 38 WNW Aero 40 WNW 12/5 32/22/27/-8/0/0/255/46 23 W 12/6 44/21/33/-1/0/0/171/31 43 SSE Aero 41 SSE 12/7 53/33/43/+9/T/T/435/79 37 W 12/8 33/17/25/-8/T/T/215/39 45 W Aero 46 WNW 12/9 36/19/28/-5/0/0/341/62 31 SSW 12/10 51/32/42/+9/0/0/516/94 35 SSW 12/11 47/35/41/+9/T/0/071/13 25 WSW 12/12 42/30/36/+4/0/0/400/73 28 SSE 12/13 50/37/44/+12/0/0.11/005/01 31 SE 12/14 56/42/49/+18/0/0/410/75 25 S 12/15 52/42/47/+16/0/0/000/00 31 S 12/16 50/35/43/+12/0.03/0/545/100 35 W 12/17 53/33/43/+12/0/0/131/24 35 SSW 12/18 52/38/45/+15/0.01/0/000/00 29 W 12/19 41/28/35/+5/0/0/441/81 29 WNW 12/20 42/25/34/+4/0/0/534/98 35 S 12/21 48/36/42/+12/0/0/218/40 33 SSW 12/22 42/29/36/+7/0.06/0/190/35 25 NW 12/23 56/39/48/+19/0.79/0/000/00 33 SE 12/24 48/36/42/+13/0/0/262/48 54 W Aero 53 W 12/25 43/33/38/+9/0.13/0/164/30 29 W 12/26 46/36/41/+13/0.34/0/000/00 35 E 12/27 40/30/35/+7/0.02/0/093/17 37 W Aero 34 W 12/28 42/28/35/+7/0/0/197/36 30 SW Aero 32 SW 12/29 33/21/27/-1/0/0/427/78 28 NW 12/30 33/21/27/-1/0.06/0.4/000/00 35 WNW Aero 36 WNW 12/31 37/22/30/+3/0/0/532/97 25 NW 1/1 morning low temp. 30 deg; normal now 19 deg. morning rainfall thru 7 a.m. 0.13 in. NEW DAILY DECEMBER RECORDS 12/1- New daily and monthly record high minimum temperature 59; previous daily record 50 in 1908 and 1934, previous monthly record 53 on 4 and 6 December 1982 and on 22 and 23 December 1990. In addition: NEW HIGHEST MINIMUM TEMPERATURE SO LATE IN YEAR, 59 deg; previous record 57 deg. 11/17/1927. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 1 HIGH 58F IN 1966 LOW -6F IN 1918 PRECIP 1.45 INS. IN 1982 SNOWFALL 7.2 INS. IN 1938 PEAK GUST 90e MPH S IN 1945 RECORDS FOR JANUARY 2 HIGH 62F IN 1890 LOW - 7F IN 1899,1918 PRECIP 2.10 INS. IN 1987 SNOWFALL 9.0 INS. IN 1904 PEAK GUST 85e MPH S IN 1942 TODAY'S REPORT By: Robert Skilling