BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, JANUARY 20, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Overcast stratocumulus Temperature: 23F, Dew point: 10F, Wind: W at 16G24 kt Sea-level pressure: 29.88 inches Hg, rising Visibility: 50 miles 6-hour min temp: 23F 24-hour precip: 0. inches Snow depth on ground: 3 inches BHO SA 1155 65 OVC 50 117/23/10/2816G24/988/ FEW BINOVC ALQDS/ 8/4// 4/003 51012 10029 20023 10 A.M. Weather: Scattered cumulus Temperature: 32F, Dew point: 2F, Wind: WNW at 25G30 kt Sea-level pressure: 29.94 inches Hg, rising Visibility: 60 miles BHO SA 1455 50 SCT 60 139/23/2/2925G30/994/ PKWND 2930/1449/ 8/400 51022 WEATHER SUMMARY FOR SATURDAY, JANUARY 19 TEMPERATURE (DEGREES F) MAX.....33 NORMAL.....33 MIN.....24 NORMAL.....18 MEAN....29 NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL...........+4 TOTAL DEPARTURE FOR THE MONTH.........+132 [+6.7 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............36 DEPARTURE.......-4 TOTAL HEATING UNITS FOR THE MONTH...........605 DEPARTURE.....-131 TOTAL HEATING UNITS FOR THE SEASON.........2772 DEPARTURE.....-293 TOTAL HEATING UNITS LAST SEASON TO DATE....2406 DIFFERENCE....+366 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............25 W AT 12:54 A.M. AEROVANE.............35 W AT 12:53 A.M. ASOS.................24 W AT 12:54 A.M. DAVIS................27 SSW AT 11:31 A.M. FASTEST MILE FOR YESTERDAY..............18 W AT 12:53 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........17 SSW AT 11:32 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........21 SSW AT 11:32 A.M. AVERAGE WIND SPEED AND DIRECTION.......9.9 SSW ASOS...............10.4 DAVIS..............10.8 SW [224 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..........3.67 DEPARTURE.....+0.71 ASOS..............3.78 TOTAL PRECIPITATION FOR THE YEAR...........3.67 DEPARTURE.....+0.71 ASOS..............3.78 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.5 TOTAL SNOWFALL FOR THE MONTH...............12.3 DEPARTURE.....+2.8 TOTAL SNOWFALL FOR THE SEASON..............42.8 DEPARTURE....+19.7 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/+21/0/0/183/33 29 S 1/8 65/45/55/+29/0/0/278/50 37 S 1/9 59/42/51/+25/0.01/0/167/30 48 S 1/10 47/35/41/+15/0/0/335/60 35 W 1/11 55/35/45/+19/1.58/T/0/0 46 S Aero 48 MPH S 1/12 47/32/40/+14/0/0/376/67 28 W 1/13 42/30/36/+10/0/0/455/81 33 ENE 1/14 36/24/30/+4/1.45/10.3/000/00 37 NE Aero 36 MPH NE 1/15 30/21/26/0/T/T/000/00 25 NW 1/16 30/16/23/-3/0/0/.../.. 28 NW 1/17 32/17/25/-1/T/T/.../.. 23 ESE Aero 19 MPH ESE 1/18 44/28/36/+10/0.39/0.2/.../.. 41 W Aero 39 MPH W 1/19 33/24/29/+4/0/0/.../.. 25 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 record of 1.14 inches in 1956 1/14 - New record daily snowfall of 10.3 inches; surpasses previous record of 9.0 inches in 1999. New record maximum daily precipitation of 1.45 inches; surpasses 1.35 inches in 2006 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 20 HIGH 59F IN 1951 LOW -9F IN 1901 PRECIP 1.95 INCHES IN 1978 SNOWFALL 19.0 INCHES IN 1978 [RECORD FOR MONTH] PEAK GUST 76e MPH NE IN 1978 RECORDS FOR JANUARY 21 HIGH 65F IN 1906 LOW -4F IN 1888,1893 PRECIP 2.49 INCHES IN 1979 SNOWFALL 7.5 INCHES IN 2001 PEAK GUST 78e MPH SE IN 1979 TODAY'S REPORT PREPARED By: Andrew Hoell