BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, JANUARY 15, 2007, MARTIN LUTHER KING, JR DAY ALL TIMES ARE IN EASTERN STANDARD TIME LOW CLOUDS, FOG AND DISMAL COOL WEATHER CONTINUES OVER ONE HALF INCH OF RAINFALL... THIN COATING OF GLAZE OVERNIGHT Over one half inch of rainfall had occurred during the 24 hours ending at mid-morning. Temperatures were rising into the upper 30's. A thin coating of glaze formed overnight stopping several of our wind instruments from late yesterday afternoon to the early hours of today but was melted by 7 a.m. Today's observations: 7 A.M. Weather: Obscurement with fog, light rain and fog Temperature: 36F, Dew point: 36F, Wind: ENE at 11 kts Sea-level pressure: 30.30 inches Hg, steady Visibility: 1/8 mile 6-hourly min. temp. 32 deg. 6-hourly rainfall: 0.22 in. 24-hourly rainfall: 0.37 in. BHO SA 1155 W3 X 1/8R-F 217/36/36/0611/017/ 8//// 56020 MANUAL 6022/ ASOS 60021 ASOS 70034 MANUAL 70037 10036 20032 10 A.M. Weather: Obscurement with fog, light drizzle and fog Temperature: 38F, Dew point: 38F, Wind: NE at 12G20 kts Sea-level pressure: 30.09 inches Hg, falling Visibility: 1/16 mile 3-hourly rainfall: 0.20 in. BHO SA 1455 W2 X 1/16R-F 189/38/38/0512G20/009/ 8//// 58028 ASOS 60019 MANUAL 6020/ WEATHER SUMMARY FOR SUNDAY, JANUARY 14 TEMPERATURE (DEGREES F) MAX.....38 NORMAL.....34 MIN.....31 NORMAL.....18 MEAN....35 NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL........+ 9 TOTAL DEPARTURE FOR THE MONTH.......+201 (+14.2 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........30 DEPARTURE......- 9 TOTAL HEATING UNITS FOR THE MONTH.........340 DEPARTURE.....-200 TOTAL HEATING UNITS FOR THE SEASON.......2248 DEPARTURE.....-656 TOTAL HEATING UNITS LAST SEASON TO DATE..2566 DIFFERENCE....-363 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...........21 ENE AT 12:32 A.M. AEROVANE............18 ENE AT 12:33 A.M. ASOS................18 E AT 2:59 A.M. DAVIS.............. 18 ENE AT 12:30 A.M. FASTEST MILE FOR YESTERDAY.............14 ENE AT 12:33 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..........15 NE AT 12:38 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.........16 ENE AT 12:31 A.M. AVERAGE WIND SPEED AND DIRECTION....... 7.5 NNW ASOS............... 4.4 * DAVIS............. 5.6 NE [040 deg.] * * anemometers frozen and stopped by glaze from about 6 p.m. to midnight PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.37 DEPARTURE......+0.22 ASOS..............0.34 TOTAL PRECIPITATION FOR THE MONTH..........2.22 DEPARTURE......+0.08 ASOS..............2.19 TOTAL PRECIPITATION FOR THE YEAR...........2.22 DEPARTURE......+0.08 ASOS..............2.19 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.5 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE.....-7.0 TOTAL SNOWFALL FOR THE SEASON...............3.7 DEPARTURE....-16.9 PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2007......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 1/1 53/30/42/+15/0.98/0/000/00 38 SE 1/2 43/31/37/+10/0.03/0/505/92 44 W Aero 47 MPH W 1/3 49/30/40/+13/0/0/435/79 40 S 1/4 53/40/47/+20/0/0/198/36* 31 SSW 1/5 61/46/54/+27/0.04/0/000/00 44 S Aero 44 MPH S 1/6 66/48/57/+31/0.03/0/161/29 48 SSW Aero 47 MPH SSW 1/7 50/38/44/+18/0/0/505/91 43 W Aero 44 MPH W 1/8 52/36/44/+18/0.69/0/000/00 45 W Aero 45 MPH W 1/9 41/29/35/+9/0/0/518/93 40 W Aero 39 MPH W 1/10 34/22/28/+2/0/0/525/94 48 W 1/11 33/17/25/-1/0/0/.../.. 36 S Aero 38 MPH S 1/12 48/32/40/+14/0/0/.../.. 38 SSW Aero 39 MPH SSW 1/13 48/36/42/+16/0.06/000/00 30 S 1/14 38/31/35/+9/../0/000/00 21 NE 11/15 morning low temp. 32 deg; normal now 18 deg. rainfall: 0.22 in. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 15 HIGH 64F IN 1995 LOW -16F IN 1957 [RECORD FOR MONTH] PRECIP 2.63 INS. IN 1958 SNOWFALL 8.8 INS. IN 1983 PEAK GUST 69e MPH SE IN 1940 RECORDS FOR JANUARY 16 HIGH 63F IN 1995 LOW -12F IN 2004 PRECIP 1.32 INS. IN 1936 SNOWFALL 14.0 INS. IN 1965 PEAK GUST 79 MPH WNW IN 1960 TODAY'S REPORT By: Robert Skilling