BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, JANUARY 9, 2011 ALL TIMES ARE IN EASTERN STANDARD TIME COASTAL STORM BRINGS ADDITIONAL SNOWFALL...COOL AND BLUSTERY TODAY... An overnight coastal storm brought an additional 0.8 inch of snowfall to the summit, increasing the two-day total to 2.2 inches. Meanwhile, strong winds out of the west-northwest have prevailed throughout the day today. Winds are averaging 15-20 miles per hour and gusting to as high as 35 miles per hour. Skies have been mostly overcast with high, thin cirrus, with a few glimpses of bright sunshine. As of 2 PM, the maximum recorded temperature was 32F - two degrees below normal. Today's observations: 7 A.M. Weather: Overcast stratus, broken stratocumulus Temperature: 26F, Dew point: 20F; Wind: WNW at 15G26 kts Wind: Direction variable W to NNW Sea-level pressure: 29.50 inches Hg, rising Visibility: 30 miles 6-hour min. temp: 25F 24-hour precipitation: 0.13 24-hour snowfall: 1.7 inch Total snow depth on ground: 3 inches BHO SA 1155 E30 BKN 35 OVC 30 990/26/20/3015G26/950/ TOTAL NEW SNW PST 24 HRS 1.7 IN WND 26V34/ 8/6// 4/003 51034 70013 10027 20025 10 A.M. Weather: Overcast cirrus, few stratocumulus offshore distant northeast, few small cumulus all quadrants Temperature: 27F, Dew point: 19F; Wind: WNW at 12G24 kts Wind: Direction variable W to NNW Sea-level pressure: 29.60 inches Hg, rising Visibility: 40 miles BHO SA 1455 200 OVC 40 024/27/19/3012G24/960/ FEW SC OFFSHR DSNT NE FEW SML CU ALQDS WND 26V33/ 8/507 51034 1 P.M. Weather: Overcast cirrus, scattered stratocumulus, stratocumulus layer along horizon distant WNW-NNW, halo, thin spots in overcast NNE-E Temperature: 31F, Dew point: 17F; Wind: WNW at 15G30 kts, Wind: Direction variable W to NNW Sea-level pressure: 29.62 inches Hg, rising Visibility: 45 miles, 50 miles SE-SW 6-hour max. temp: 32F BHO SA 1755 40 SCT E230 OVC 45 029/31/17/2915G30/962/ SC LYR ALG HRZN DSNT WNW-NNW HALO THN SPTS IOVC NNE-E VSBY SE-SW 50 PK WND 2930/53 WND 26V33/ 8/507 53005 10032 20025 WEATHER SUMMARY FOR SATURDAY, JANUARY 8 TEMPERATURE (DEGREES F) MAX.....30 NORMAL.....34 MIN.....26 NORMAL.....18 MEAN....28 NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL.................+2 TOTAL DEPARTURE FOR THE MONTH................+40 [+4.8 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............37 DEPARTURE........-2 TOTAL HEATING UNITS FOR THE MONTH...........267 DEPARTURE.......-39 TOTAL HEATING UNITS FOR THE SEASON.........2519 DEPARTURE......-116 TOTAL HEATING UNITS LAST SEASON TO DATE....2570 DIFFERENCE......-51 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............23 NNW AT 9:02 P.M. * AEROVANE...............28 NNW AT 8:59 P.M. * ASOS...................24 WNW AT 8:57 P.M. DAVIS..................23 NE AT 3:37 A.M. THE FASTEST MILE FOR YESTERDAY........... 17 NNW AT 10:51 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.............17 WNW AT 10:53 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE............17 NE AT 3:37 A.M. AVERAGE WIND SPEED AND DIRECTION.........10.8 NNW ASOS..................10.4 DAVIS.................9.8 WNW [337 DEG] * Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.13 DEPARTURE........-0.02 ASOS..............0.13 TOTAL PRECIPITATION FOR THE MONTH..........0.37 DEPARTURE........-0.83 ASOS..............0.37 TOTAL PRECIPITATION FOR THE YEAR...........0.37 DEPARTURE........-0.83 ASOS...............0.37 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........1.7 DEPARTURE.........1.2 TOTAL SNOWFALL FOR THE MONTH................2.2 DEPARTURE........-1.8 TOTAL SNOWFALL FOR THE SEASON..............25.2 DEPARTURE........+7.6 PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2011 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 1/1 57/37/47/+20/0.00/0.0/.../.. 25 S 1/2 47/33/40/+13/0.21/0.0/.../.. 38 WNW AERO 44 MPH WNW 1/3 33/23/28/+1/0.00/0.0/.../.. 40 NW AERO 48 MPH NW 1/4 37/21/29/+2/0.00/0.0/.../.. 29 SSW AERO 35 MPH SSW 1/5 37/22/30/+3/0.00/0.0/.../.. 35 W AERO 38 MPH W 1/6 30/17/24/-2/0.00/0.0/.../.. 16 WNW 1/7 33/20/27/+1/.../T/.../.. 19 NNE 1/8 30/26/28/+2/.../.../.../.. 23 NNW 1/9 morning low temp: 25F; the normal low is now 18F DAILY RECORDS FOR JANUARY 2011 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): 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] RECORDS FOR JANUARY 10 HIGH 54F IN 2000 LOW -7F IN 2004 PRECIP 2.16 INS. IN 1935 SNOWFALL 6.3 INS. IN 1977 PEAK GUST 73e SE IN 1977 TODAY'S REPORT PREPARED BY: Eli Melaas