BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, JANUARY 22, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME STRONG SOUTH WINDS GUSTING 54 TO 61 MPH DURING THE NOON HOUR BRINGING MUCH WARMER AIR TEMPERATURES FROM THE TEENS TO MID-30'S TODAY South winds increased rapidly late this morning and by 12:30 P.M. gusts reached well past 50 MPH. As of 12:27 P.M. the following gusts had been recorded: Maximum, Inc. Maestro 61 MPH Davis system..........59 MPH S Aerovane..............55 MPH S ASOS..................54 MPH S 420C..................52 MPH S Temperatures have risen rapidly today from 15F early this morning to 37F by early afternoon. Today's observations: 7 A.M. Weather: Broken altocumulus, overcast high thin cirrus clouds Temperature: 17F, Dew point: 4F, Wind: SSE at 14 kts Sea-level pressure: 30.45 inches Hg, falling Visibility: 25 miles, light haze 6-hour min temp: 15F 24-hour precip: 0 inches Snow depth on ground: 3 inches BHO SA 1155 E95 BKN 250 –BKN 300 –OVC 25 311/17/4/1614/045/ FEW ACSL BINOVC LGT HZ/ 8/031 4/003 58026 10017 20015 10 A.M. Weather: Thin broken altocumulus, thin overcast cirrus with breaks in overcast, Temperature: 27F, Dew point: 16F, Wind: SSE at 15 kts Wind: Gust to 25 kts past hour Sea-level pressure: 30.31 inches Hg, falling Visibility: 25 miles, hazy BHO SA 1455 150 –BKN 250 –OVC 25 264/27/16/1615/031/ FEW LWR AC N-NE BINOVC HAZY GST TO 25 KTS PST HR/ 8/031 58047 1 P.M. Weather: Overcast with stratocumulus, small breaks in overcast Temperature: 36F, Dew point: 24F, Wind: S at 27G38 kts Wind: Peak wind S @ 45 kts @ 27 minutes past the hour Sea-level pressure: 30.11 inches Hg, falling rapidly Visibility: 35 miles, WNW 45 miles BHO SA 1755 E37 OVC 35 198/36/24/1827G38/011/ CIG RGD SML BINOVC VSBY WNW 45 PK WND 1945/27/ PRESFR/ 8/5// 58066 10037 20017 WEATHER SUMMARY FOR MONDAY, JANUARY 21 TEMPERATURE (DEGREES F) MAX.....21 NORMAL.....33 MIN.....10 NORMAL.....17 MEAN....16 NORMAL.....25 DEPARTURE FROM 30-YEAR NORMAL...........-9 TOTAL DEPARTURE FOR THE MONTH.........+119 [+5.5 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............49 DEPARTURE.......+9 TOTAL HEATING UNITS FOR THE MONTH...........698 DEPARTURE.....-117 TOTAL HEATING UNITS FOR THE SEASON.........2865 DEPARTURE.....-278 TOTAL HEATING UNITS LAST SEASON TO DATE....2498 DIFFERENCE....+367 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............35 W AT 12:39 P.M. AEROVANE.............33 W AT 12:39 P.M. ASOS.................32 W AT 12:39 P.M. DAVIS................33 W AT 12:38 P.M. FASTEST MILE FOR YESTERDAY..............27 W AT 12:34 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........26 W AT 12:40 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........28 WSW AT 12:40 P.M. AVERAGE WIND SPEED AND DIRECTION....... 13.8 WSW ASOS.................13.7 DAVIS................14.0 WSW [240] 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.....+0.39 ASOS..............3.78 TOTAL PRECIPITATION FOR THE YEAR...........3.67 DEPARTURE.....+0.39 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.....+1.8 TOTAL SNOWFALL FOR THE SEASON..............42.8 DEPARTURE....+18.7 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/+6/0.24/1.8/049/09* 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/-11/0/0/242/44* 31 SSW 1/5 38/24/31/+4/0/0/287/52* 28 SSW 1/6 47/34/41/+15/0/0/133/24 27 SSW 1/7 54/39/47/+21/0/0/188/34* 29 S 1/8 65/45/55/+29/0/0/283/51* 37 S 1/9 59/42/51/+25/0.01/0/167/30 48 S 1/10 47/35/41/+15/0/0/340/61* 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/-3/0/0/560/99 28 NW 1/17 32/17/25/-1/T/T/154/27 23 ESE Aero 19 MPH ESE 1/18 44/28/36/+10/0.39/0.2/331/58 41 W Aero 39 MPH W 1/19 33/24/29/+4/0/0/092/16 25 W 1/20 29/13/21/-4/0/0/.../.. 38 WNW Aero 40 MPH WNW 1/21 21/10/16/-10/0/0/.../.. 35 W Aero 33 MPH W 1/22 morning low temp. 15F; our normal low is now 17F * Small corrections have been made to daily sunshine data; minutes and percentages have changed slightly we've recorded 40% of possible sunshine thru the 19th 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 22 HIGH 59F IN 1916 LOW -8F IN 1888,1976 PRECIP 1.24 INS. IN 1891,1987 SNOWFALL 10.0 INS. IN 2005 PEAK GUST 67 MPH W IN 1976 RECORDS FOR JANUARY 23 HIGH 62F IN 1906 LOW -10F IN 1976 PRECIP 2.40 INS. IN 1935 SNOWFALL 14.6 INS. IN 1966 PEAK GUST 85 MPH S IN 1992 TODAY'S REPORT PREPARED By: Robert Skilling