BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, JANUARY 16, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M.   Weather: Overcast  Temperature: 36F, Dew point: 29F, Wind: W at 20G30 kt Sea-level pressure: 29.80 inches Hg, rising Visibility: 45 miles 24-hourly rainfall: 0.40 inches BHO SA 1155 60 SCT 90 OVC 45 090/36/29/2720G30/980/ FEW BINOVC ALQDS/ 8/42/ 53028 70040 10038 20033   10 A.M.    Weather: Overcast Temperature: 31F, Dew point: 25F, Wind: WNW at 25G31 kt Sea-level pressure: 29.89 inches Hg, rising   Visibility: 25 miles   BHO SA 1455 20 BKN 90 OVC 25 123/31/25/2925G31/989/ 8/42/ 1 P.M.    Weather: Overcast Temperature: 28F, Dew point: 18F, Wind: W at 16G26 kt Sea-level pressure: 29.92 inches Hg, rising   Visibility: 40 miles   BHO SA 1755 30 BKN 90 OVC 40 131/28/18/2616G26/992/ SUN DMLY VSBL FEW BINOVC NW HIER CLDS VSBL/ 8/421 51008 10036 20028 WEATHER SUMMARY FOR MONDAY, JANUARY 15  TEMPERATURE (DEGREES F) MAX.....40   NORMAL.....34 MIN.....31   NORMAL.....18   MEAN....36   NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL........+10 TOTAL DEPARTURE FOR THE MONTH.......+211 (+13.9 DEGREES/DAY)   HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........29   DEPARTURE......-10 TOTAL HEATING UNITS FOR THE MONTH.........369   DEPARTURE.....-210 TOTAL HEATING UNITS FOR THE SEASON.......2277   DEPARTURE.....-666 TOTAL HEATING UNITS LAST SEASON TO DATE..2607   DIFFERENCE....-365   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............25 NNE AT 1:54 P.M. *                    AEROVANE.............24 NE  AT 9:35 A.M.                    ASOS.................25 NE  AT 9:46 A.M.                    DAVIS................24 NNE      FASTEST MILE FOR YESTERDAY..............17 NNE AT 1:25 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........17 NE  AT 1:15 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........19 ENE AVERAGE WIND SPEED AND DIRECTION.......9.0 NE                     ASOS...............7.8                        DAVIS..............7.1 NE [029 deg.] * last of several occurrences   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.40  DEPARTURE......+0.24                          ASOS..............0.40 TOTAL PRECIPITATION FOR THE MONTH..........2.62  DEPARTURE......+0.32                          ASOS..............2.57    TOTAL PRECIPITATION FOR THE YEAR...........2.62  DEPARTURE......+0.32                          ASOS..............2.57 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.....-0.5 TOTAL SNOWFALL FOR THE MONTH................0.0   DEPARTURE.....-7.5 TOTAL SNOWFALL FOR THE SEASON...............3.7   DEPARTURE....-17.4   PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2007......CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available   1/1  53/30/42/+15/0.98/0/000/00     38 SE 1/2  43/31/37/+10/0.03/0/505/92     44 W    Aero 47 MPH W   1/3  49/30/40/+13/0/0/435/79        40 S   1/4  53/40/47/+20/0/0/198/36*       31 SSW 1/5  61/46/54/+27/0.04/0/000/00     44 S    Aero 44 MPH S 1/6  66/48/57/+31/0.03/0/161/29     48 SSW  Aero 47 MPH SSW 1/7  50/38/44/+18/0/0/505/91        43 W    Aero 44 MPH W 1/8  52/36/44/+18/0.69/0/000/00     45 W    Aero 45 MPH W 1/9  41/29/35/+9/0/0/518/93         40 W    Aero 39 MPH W 1/10 34/22/28/+2/0/0/525/94         48 W 1/11 33/17/25/-1/0/0/.../..         36 S    Aero 38 MPH S 1/12 48/32/40/+14/0/0/.../..        38 SSW  Aero 39 MPH SSW 1/13 48/36/42/+16/0.06/000/00       30 S     1/14 38/31/35/+9/../0/000/00        21 NE 1/15 40/31/36/+10/../0/000/00       25 NNE 11/15 morning low temp. 32 deg; normal now 18 deg.       rainfall: 0.22 in.       DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 16 HIGH 63F IN 1995 LOW -12F IN 2004 PRECIP 1.32 INCHES IN 1936 SNOWFALL 14.0 INCHES IN 1965 PEAK GUST 79 MPH WNW IN 1960 RECORDS FOR JANUARY 17 HIGH 55F IN 1973,1995 LOW -8F IN 1907,1982 PRECIP 1.43 INCHES IN 1956 SNOWFALL 13.4 INCHES IN 1956 PEAK GUST 62 MPH S IN 1994 TODAY'S REPORT By: Andrew Hoell