BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, JANUARY 14, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME LOW CLOUDS, FOG AND DRIZZLE TODAY TEMPERATURES REMAIN ABOVE FREEZING The summit is in the low stratus clouds and light drizzle has been occurring this morning with a total of 0.03 inch having been recorded by mid-morning. Since early yesterday, there has been a total of just 0.09 inch of rain and drizzle. Temperatures averaged 16 degrees warmer than normal yesterday making the 10th out of 13 days to have double digit positive temperature departures. January continues at over 14 degrees warmer than normal through almost two weeks now. Today's observations: 7 A.M. Weather: Obscurement with fog, light drizzle and fog Temperature: 35F, Dew point: 35F, Wind: ENE at 7 kts Sea-level pressure: 30.30 inches Hg, steady Visibility: 1/4 mile, variable 1/8 to 1/2 mile, SW 1 mile 6-hourly min. temp. 34 deg. 6-hourly rainfall: 0.02 in. 24-hourly rainfall: 0.08 in. BHO SA 1155 W3 X 1/4VL-F 260/35/35/0607/030/ VSBY 1/8V1/2 SW 1/ 8//// 55002 ASOS 60001 MANUAL 6002/ ASOS 70007 MANUAL 70008 10035 20034 10 A.M. Weather: Temperature: 37F, Dew point: 37F, Wind: NE at 8 kts Sea-level pressure: 30.11 inches Hg, Visibility: 1/8 mile 3-hourly rainfall: 0.01 in. BHO SA 1455 W3 X 1/8L-F 250/37/37/0508/011/ PCPN VRY LGT/ 8//// 58010 ASOS 60001 MANUAL 6001/ WEATHER SUMMARY FOR SATURDAY, JANUARY 13 TEMPERATURE (DEGREES F) MAX.....48 NORMAL.....34 MIN.....36 NORMAL.....18 MEAN....42 NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL........+16 TOTAL DEPARTURE FOR THE MONTH.......+192 (+14.6 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........23 DEPARTURE......-16 TOTAL HEATING UNITS FOR THE MONTH.........287 DEPARTURE.....-191 TOTAL HEATING UNITS FOR THE SEASON.......2183 DEPARTURE.....-647 TOTAL HEATING UNITS LAST SEASON TO DATE..2550 DIFFERENCE....-367 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...........30 S AT 3:43 A.M. AEROVANE............28 S AT 3:43 A.M. ASOS................30 S AT 3:43 A.M. DAVIS...............33 S AT 3:43 A.M. FASTEST MILE FOR YESTERDAY.............23 S AT 5:09 A.M. * MAXIMUM 2-MINUTE ASOS AVERAGE..........23 SSW AT 5:16 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.........27 SSW AT 5:16 A.M. AVERAGE WIND SPEED AND DIRECTION.......13.2 SSW ASOS...............13.7 DAVIS............. 14.0 SSW [210 deg] * last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.08 DEPARTURE......-0.07 ASOS..............0.07 TOTAL PRECIPITATION FOR THE MONTH..........1.85 DEPARTURE......-0.14 ASOS..............1.84 TOTAL PRECIPITATION FOR THE YEAR...........1.77 DEPARTURE......-0.14 ASOS..............1.84 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.....-6.5 TOTAL SNOWFALL FOR THE SEASON...............3.7 DEPARTURE....-16.4 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 morning low temp. 34 deg; normal now 18 deg. rainfall: 0.02 in. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 14 HIGH 65F IN 1995 LOW -12F IN 1914 PRECIP 1.11 INS. IN 1921 SNOWFALL 9.0 INS. IN 1999 PEAK GUST 68 MPH WNW IN 1976 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 TODAY'S REPORT By: Robert Skilling