BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, JANUARY 8, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME TEMPERATURES CONTINUE TO CLIMB, COLD JANUARY NO LONGER We saw a strong temperature inversion this morning, with our low only reaching 27 F while nearby Norwood bottomed out at 16F. Further west in Orange the overnight low plummeted to 5 F. Temperatures hit the mid 40's by 1:00 PM EST today even with steadily increasing cloud cover. The warming trend of this month looks poised to continue throughout the week. Strong SSW winds have occasionally gusted to 35-40 mph today. Today's observations: 7 A.M. Weather: Scattered thin cirrus WNW-NE, thin smoke/haze layer distant all quadrants, hazy Temperature: 31F; Dew Point: 27F; Wind: SSW at 21G26 kts, Wind: Peak wind of 30 kts. from the SSW at 6:04 A.M. EST Sea-level pressure: 30.32 ins. Hg, falling then rising Visibility: 20 miles, hazy Snow depth: 2 inches 6-hr min. temp: 27F BHO SA 1155 250 –SCT 20 267/31/27/2121G26/032/ CI WNW-NE THN K/HZ LYR DSNT ALQDS HAZY PK WND 2130/04/ 8/001 4/002 55000 10031 20027 10 A.M. Weather: Scattered thin cirrus, few cirrocumulus NW and SSE, mostly clear sky SSE-WSW, thin smoke layer distant all quadrants, hazy Temperature: 39F; Dew Point: 27F; Wind: WSW at 18G29 kts, Wind: Peak wind of 30 kts. from the WSW at 9:38 A.M. EST Wind: Direction variable S to W Sea-level pressure: 30.35 ins. Hg, rising then falling Visibility: 25 miles, hazy, thin haze/smoke layer all directions BHO SA 1455 250 -SCT 25 276/39/27/2418G29/035/ FEW CC NW AND SSE MSTLY CLR SKY SSE-WSW THN K LYR DSNT ALQDS HAZY PK WND 2430/38 WND 17V28/ 8/009 50009 1 P.M. Weather: Broken cirrostratus and cirrus, partial halo, thin smoke/haze layer distant all quadrants Temperature: 44F; Dew Point: 28F; Wind: SW at 14G23kts, Wind: direction variable S-W Sea-level pressure: 30.28 ins. Hg, falling then falling more rapidly Visibility: 30 miles, hazy 6-hour max: 44F BHO SA 1755 E200 BKN 250 BKN 30 254/44/28/2315G23/028/ PARTIAL HALO THN K/HZ LYR ALQDS HAZY WND 19V27/ 8/007 58022 10044 20031 WEATHER SUMMARY FOR MONDAY, JANUARY 7 TEMPERATURE (DEGREES F) MAX.....38 NORMAL.....34 MIN.....27 NORMAL.....18 MEAN....33 NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL......................+7 TOTAL DEPARTURE FOR THE MONTH......................+6 [+0.7 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............32 DEPARTURE.........-7 TOTAL HEATING UNITS FOR THE MONTH...........265 DEPARTURE.........-6 TOTAL HEATING UNITS FOR THE SEASON.........2293 DEPARTURE.......-282 TOTAL HEATING UNITS LAST SEASON TO DATE....1976 DIFFERENCE......+317 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...............29 NW AT 10:18 A.M. AERO....................27 NW AT 10:21 A.M. * ASOS....................29 NW AT 10:19 A.M. DAVIS...................27 NW AT 10:18 A.M. RMY: N/A THE FASTEST MILE FOR YESTERDAY.............19 NW AT 10:22 A.M. * MAXIMUM 2-MINUTE ASOS AVERAGE..............18 NNW AT 10:33 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.............17 NW AT 10:21 A.M. AVERAGE WIND SPEED AND DIRECTION.........11.4 NW ASOS..................11.1 DAVIS.................10.1 W [281 deg.] *last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE..........-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH.........Trace DEPARTURE..........-1.00 ASOS..............0.00 TOTAL PRECIPITATION FOR THE YEAR..........Trace DEPARTURE..........-1.00 ASOS..............0.00 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........0.0 DEPARTURE............-0.5 TOTAL SNOWFALL FOR THE MONTH...............0.1 DEPARTURE............-3.9 TOTAL SNOWFALL FOR THE SEASON.............15.5 DEPARTURE............-4.5 PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2013 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/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 35/18/27/0/0.00/0.0/.../.. 44 WNW AERO 44 MPH WNW RMY 45 1/2 29/11/20/-7/0.00/0.0/.../.. 35 WNW AERO 35 MPH WNW RMY 33 1/3 23/2/13/-13/0.00/0.0/.../.. 24 WNW AERO 23 MPH WNW RMY 23 1/4 38/19/29/+3/0.00/0.0/.../.. 35 W AERO 36 MPH W RMY 36 1/5 40/27/34/+8/0.00/0.0/.../.. 36 WNW AERO 37 MPH WNW RMY 38 1/6 42/26/34/+8/T/0.1/.../.. 29 SW AERO 29 MPH SW RMY 29 1/7 38/27/33/+7/0.00/0.0/.../.. 29 NW AERO 27 MPH NW RMY N/A 1/8 morning low temp: 27F; the normal low is now 18F DAILY RECORDS FOR JANUARY 2013 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 8 HIGH 65F IN 2008 LOW -8F IN 1968 PRECIP 1.70 INS. IN 1958,1979 SNOWFALL 12.5 INS. IN 1996 PEAK GUST 77 MPH NNW IN 1958 RECORDS FOR JANUARY 9 HIGH 62F IN 1937 LOW -9F IN 1968 PRECIP 3.00 INS. IN 1956 SNOWFALL 10.0 INS. IN 1904 PEAK GUST 101e MPH SE IN 1978 [RECORD FOR MONTH] TODAY'S REPORT PREPARED BY: Sean Fankhauser, Forrest Iwanik