BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, JANUARY 14, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME TOTAL SNOWFALL OF 10 INCHES IN LESS THAN 8 HOURS QUICK HITTING HEAVY WET SNOWSTORM BREAKS OUR DAILY SNOWFALL RECORD FOR TODAY'S DATE WHICH WAS 9 INCHES Rain changed quickly to snow between 3 and 4 a.m. this morning and accumulated rapidly with up to 2 inches per hour. The total had reached 5.8 inches by 7 a.m., and the final total appears to be 10.2 inches by 1 p.m. The surpasses the previous 9.0 inches for this date in 1999. Today's observations: 7 A.M. Weather: Obscurement with moderate snow and fog Temperature: 31F, Dew point: 31F, Wind: NNE 16G25 kts Wind: Peak wind 27 kts NNE @ 05 mins. past the hour Sea-level pressure: 29.84 inches Hg, falling Visibility: 1/8 mile, 6-hour min temp: 31F 24 hourly precip: 0.74 inch 24 hourly snowfall: 5.8 ins. 24 hourly asos precip: 0.72 in. Snow on ground: 6 inches BHO SA 1155 W3 X 1/8SF 105/31/31/0216G25/984/ SNOINC2 SNOW WET PK WND 0327/05/ TOTAL NEW SNW PST 24 HRS 5.8 INS/8//// 4/006 56028 ASOS 70072 MANUAL 70074 10036 20031 10 A.M. Weather: Obscurement with light snow and fog Temperature: 27F, Dew point: 27F, Wind: NNW at 14G25 kt Sea-level pressure: 29.81 inches Hg, falling Visibility: 1/4 variable 1/8 to 1/2 light snow and fog 3-hourly snowfall: 4.0 ins. 3-hourly precip: not available at this time 3-hourly asos precip: 0.61 inch BHO SA 1455 W3 X 1/4VS-F 096/27/27/3414G25/981/ VSBY 1/8V1/2 S- ONCL S SNOINC1 TOTAL NEW SNW 3 HRS 4.0 INS EVENT TOTAL 9.8 INS/ 8//// 56009 ASOS 60061 MANUAL 6XXX/ 1 P.M. Weather: Low overcast stratus, very light snow grains occurring with thin fog Temperature: 28F, Dew point: 27F, Wind: NNW at 14G22 kts Wind: variability NW-N Sea-level pressure: 29.73 inches Hg, falling Visibility: 4 miles, very light snow grains, fog 6-hourly snowfall: 4.4 inches 6-hourly asos precip: 0.72 inch 6-hour manual precip: not available at this time 6-hourly min. temp. 26F 6-hourly max. temp. 31F BHO SA 1755 E5 OVC 4SG-F 069/28/27/3414G22/973/ WND 31V01 PCPN VRY LGT TOTAL NEW SNW PST 6 HRS 4.4 INS EVENT TOTAL 10.2 INS/ 8/6// 56027 ASOS 60072 MANUAL 6XXX/ 10031 20026 WEATHER SUMMARY FOR SUNDAY, JANUARY 13 TEMPERATURE (DEGREES F) MAX.....42 NORMAL.....34 MIN.....30 NORMAL.....18 MEAN....36 NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL..........+10 TOTAL DEPARTURE FOR THE MONTH.........+118 [+8.9 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............29 DEPARTURE......-10 TOTAL HEATING UNITS FOR THE MONTH...........384 DEPARTURE.....-117 TOTAL HEATING UNITS FOR THE SEASON.........2551 DEPARTURE.....-279 TOTAL HEATING UNITS LAST SEASON TO DATE....2183* DIFFERENCE....+368* * corrected PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............33 ENE AT 10:58 P.M. AEROVANE.............30 ENE AT 10:58 P.M. ASOS.................31 NE AT 11:05 P.M. DAVIS................30 ENE AT 10:58 P.M. FASTEST MILE FOR YESTERDAY..............22 ENE AT 10:59 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........22 ENE AT 10:59 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........22 ENE AT 10:59 P.M. AVERAGE WIND SPEED AND DIRECTION......12.2 ENE ASOS...............12.1 DAVIS..............12.3 NNE [030 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.74 DEPARTURE.....+0.58 ASOS..............0.72 TOTAL PRECIPITATION FOR THE MONTH..........2.57 DEPARTURE.....+0.57 ASOS..............2.64 TOTAL PRECIPITATION FOR THE YEAR...........2.57 DEPARTURE.....+0.57 ASOS..............2.64 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........5.8 DEPARTURE.....+5.3 TOTAL SNOWFALL FOR THE MONTH................7.6 DEPARTURE.....+1.1 TOTAL SNOWFALL FOR THE SEASON..............38.1 DEPARTURE....+18.0 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 1/13 42/30/36/+10/0/0/.../.. 33 ENE 1/14 morning low temp. 31F; normal low is now 18F 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 1/14 - New record daily snowfall of 10.2 inches; surpasses previous 9.0 inches in 1999. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): 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 RECORDS FOR JANUARY 15 HIGH 64F IN 1995 LOW -16F IN 1957 [RECORD FOR MONTH] PRECIP 2.63 INS. IN 1958 SNOWFALL 8.8 INS. IN 1983 PEAK GUST 69e MPH SE IN 1940 TODAY'S REPORT PREPARED By: Robert Skilling