BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JANUARY 13, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME WARM WEATHER CONTINUES FOR A FEW MORE DAYS...RETURN TO WINTERY CONDITIONS EXPECTED BY EARLY NEXT WEEK... Friday was another warm mid-winter day with a temperature departure of +14. This raises the monthly departure to +176 degrees, or more than 14 degrees per day. The total cumulative temperature departure for the period December 1 to January 12 is now +404 degrees, which is more than 9 degrees above normal per day. The high and low so far today are 47 and 39, well above the normal of 34 and 18, but below the records for the date. There's been a total of 0.06 inch of precipitation in light rain today through 1 PM. Today's observations: 7 A.M. Weather: Broken stratocumulus and overcast altostratus Temperature: 44F, Dew point: 37F, Wind: SSW at 16G23 kts Sea-level pressure: 30.09 inches Hg, rising Visibility: 15 miles 6-hourly min. temp. 40 deg. BHO SA 1155 E75 BKN 100 OVC 15 188/44/37/2016G23/009/ FEW LWR SC/ 8/57/ 53003 10044 20040 10 A.M. Weather: Light rain, overcast nimbostratus Temperature: 45F, Dew point: 43F, Wind: SSW at 14 kts Sea-level pressure: 30.11 inches Hg, rising Visibility: 10 miles BHO SA 1455 E75 OVC 10R- 195/45/43/2114/011/ FEW SC HIR CLDS VSBL NW-NNW/ 8/52/ 53007 600// 1 P.M. Weather: Light rain. light drizzle and fog, overcast nimbostratus Temperature: 47F, Dew point: 47F, Wind: SW at 9 kts Sea-level pressure: 30.08 inches Hg, falling Visibility: 5 miles 6-hourly max. temp: 47 deg. 6-hourly precipitation: 0.06 inch BHO SA 1755 E70 OVC 5R-L-F 185/47/47/2209/008/ FEW SC HIR CLDS OCNLY VSBL SW-NW PCPN VRY LGT R-E00L-BUKN R-B25/ 8/52/ 57010 6006/ 10047 20044 WEATHER SUMMARY FOR FRIDAY, JANUARY 12 TEMPERATURE (DEGREES F) MAX.....48 NORMAL.....34 MIN.....32 NORMAL.....18 MEAN....40 NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL........+14 TOTAL DEPARTURE FOR THE MONTH.......+176 (+14.5 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........25 DEPARTURE......-14 TOTAL HEATING UNITS FOR THE MONTH.........287 DEPARTURE.....-175 TOTAL HEATING UNITS FOR THE SEASON.......2160 DEPARTURE.....-631 TOTAL HEATING UNITS LAST SEASON TO DATE..2531 DIFFERENCE....-371 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...........38 SSW AT 6:50 A.M.* AEROVANE............39 SSW AT 6:50 A.M. ASOS................37 SSW AT 2:02 A.M. DAVIS...............43 S AT 6:49 A.M. FASTEST MILE FOR YESTERDAY.............30 SSW AT 6:48 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..........30 S AT 5:55 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.........33 S AT 4:58 A.M. AVERAGE WIND SPEED AND DIRECTION.....19.5 S ASOS..............19.5 DAVIS.............20.0 SSW [198 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE......-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.77 DEPARTURE......-0.07 [CORRECTED] ASOS..............1.78 TOTAL PRECIPITATION FOR THE YEAR...........1.77 DEPARTURE......-0.07 [CORRECTED] ASOS..............1.78 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.....-6.0 TOTAL SNOWFALL FOR THE SEASON...............3.7 DEPARTURE....-15.9 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 morning low temp. 39 deg; normal low now 18 deg. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 13 HIGH 57F IN 1890,1932 LOW -10F IN 1912,1914 PRECIP 1.54 INS. IN 1979 SNOWFALL 12.6 INS. IN 1964 PEAK GUST 74 MPH NE IN 1964 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 TODAY'S REPORT By: Mike Iacono