BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, JANUARY 13, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Clear with thin scattered cirrus Temperature: 31F, Dew point: 23F, Wind: NNW at 12 kt Sea-level pressure: 30.21 inches Hg, rising Visibility: 50 miles 6-hour min temp: 30F Snow on ground: 0 inches BHO SA 1155 CLR 50 232/31/23/3412/021/ THN SCT CI SE/ 8/001 53014 10032 20030 10 A.M. Weather: Scattered cirrus Temperature: 37F, Dew point: 25F, Wind: NNE at 12G16 kt Sea-level pressure: 30.27 inches Hg, rising Visibility: 50 miles BHO SA 1455 250 SCT 50 251/37/25/0112G16/027/ FEW AC SW AND NE/ 8/071 51019 WEATHER SUMMARY FOR SATURDAY, JANUARY 12 TEMPERATURE (DEGREES F) MAX.....47 NORMAL.....34 MIN.....32 NORMAL.....18 MEAN....40 NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL..........+14 TOTAL DEPARTURE FOR THE MONTH.........+108 [+8.8 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............25 DEPARTURE......-14 TOTAL HEATING UNITS FOR THE MONTH...........355 DEPARTURE.....-107 TOTAL HEATING UNITS FOR THE SEASON.........2522 DEPARTURE.....-269 TOTAL HEATING UNITS LAST SEASON TO DATE....2183 DIFFERENCE....+339 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............24 W AT 12:03 P.M. AEROVANE.............27 W AT 12:03 P.M. ASOS.................25 WNW AT 12:03 P.M. DAVIS................26 W AT 11:52 A.M. FASTEST MILE FOR YESTERDAY..............20 W AT 12:02 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........18 W AT 11:41 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........20 W AT 11:41 A.M. AVERAGE WIND SPEED AND DIRECTION......11.8 W ASOS...............11.5 DAVIS..............12.5 W [268 DEG] * Last of several occurrences. 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..........1.83 DEPARTURE....-0.01 ASOS..............1.92 TOTAL PRECIPITATION FOR THE YEAR...........1.83 DEPARTURE....-0.01 ASOS..............1.92 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.5 TOTAL SNOWFALL FOR THE MONTH................1.8 DEPARTURE.....-4.2 TOTAL SNOWFALL FOR THE SEASON..............32.3 DEPARTURE....+12.7 PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2008 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 1/1 38/28/33/+6/0.24/1.8/055/10 30 E 1/2 29/7/18/-9/T/T/006/01 43 NW Aero 43 MPH NW 1/3 11/2/7/-20/0/0/539/98 35 NW 1/4 30/2/16/-11/0/0/253/46 31 SSW 1/5 38/24/31/+4/0/0/292/53 28 SSW 1/6 47/34/41/+15/0/0/133/24 27 SSW 1/7 54/39/47/+21/0/0/.../.. 29 S 1/8 65/45/55/+29/0/0/.../.. 37 S 1/9 59/42/51/+25/0.01/0/.../.. 48 S 1/10 47/35/41/+15/0/0/.../.. 35 W 1/11 55/35/45/+19/1.58/T/0/0 46 S Aero 48 MPH S 1/12 47/32/40/+14/0/0/.../.. 28 W NEW DAILY RECORDS FOR JANUARY 2008: 1/8 - New record high temperature of 65 deg; the previous record, 59 deg. in 1930 New record high minimum temperature of 45 deg; the previous record 41 deg. in 1930, 1935, 1967 1/9 - New record high minimum temperature of 42 deg; the previous record 39 deg. in 1937, 1956. 1/11 - New record rainfall of 1.58 inches; surpasses previous 1.14 inches in 1956 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 INCHES IN 1979 SNOWFALL 12.6 INCHES IN 1964 PEAK GUST 74 MPH NE IN 1964 RECORDS FOR JANUARY 14 HIGH 65F IN 1995 LOW -12F IN 1914 PRECIP 1.35 INCHES IN 2006 SNOWFALL 9.0 INCHES IN 1999 PEAK GUST 68 MPH WNW IN 1976, S IN 2005 TODAY'S REPORT PREPARED By: Andrew Hoell