BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, JANUARY 19, 2005 TODAY'S OBSERVATIONS.... 7 A.M. Sky: Broken altocumulus with stratocumulus offshore Visibility: 35 miles Temperature: 2F, Dew point: -9F 6-hour maximum: 2F, 6-hour minimum: -3F Wind: E at 10 kt Sea-level pressure: 1031.0 hPa (falling) Snow on ground: 2 inches BHO SA 1155 120 BKN 35 310/1/-9/1010/045/ SC LYR ALG/OFFSHR NE-SE K LYR ALNG HRZN ALQDS/ 8/570 4/002 56018 10002 21003 10 A.M. Sky: Broken altocumulus, overcast cirrus with breaks Temperature: 7F, Dew point: 0F Visibility: 35 miles Wind: S at 10 kt Sea-level pressure: 1029.5 hPa (falling) BHO SA 1455 150 BKN 200 OVC 35 295/7/0/1710/040/ THN K LYR ALNG HRZN ALQDS FEW BINOVC ALQDS/ 8/071 58015 1 P.M. Sky: Broken stratocumulus, overcast cirrus Visibility: 35 miles Temperature: 17F, Dew point: 9F 6-hour maximum: 17F, 6-hour minimum: 1F Wind: S at 9 kt Sea-level pressure: 1025.0 hPa (falling) BHO SA 1755 E5 BKN 100 OVC 35 250/17/9/1709G15/027/ FEW SCSL NW-NE/ 8/77/ 58045 10017 20001 WEATHER SUMMARY FOR TUESDAY, JANUARY 18: TEMPERATURE (DEGREES F) MAX.....11 NORMAL.....33 MIN.....00 NORMAL.....18 MEAN....06 NORMAL.....26 DEPARTURE FROM 30-YEAR NORMAL.... -20 TOTAL DEPARTURE FOR THE MONTH.....+84 (+4.6 DEGREES/DAY) PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........38 W AT 9:13 A.M. AEROVANE.........40 W AT 9:12 A.M. ASOS.............37 WNW AT 1:50 A.M. FASTEST MILE FOR YESTERDAY..........32 W AT 9:24 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......29 W AT 10:13 A.M AVERAGE WIND SPEED AND DIRECTION..19.6 WNW ASOS...........19.5 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..........4.16 DEPARTURE....+1.36 ASOS..............4.06 TOTAL PRECIPITATION FOR THE YEAR...........4.16 DEPARTURE....+1.36 ASOS..............4.06 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.5 TOTAL SNOWFALL FOR THE MONTH...............12.8 DEPARTURE.....+3.8 TOTAL SNOWFALL FOR THE SEASON..............36.8 DEPARTURE....+14.2 PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2005......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 49/32/41/+14/0/0/538/98 45 MPH W 1/2 39/26/33/+6/0.05/0/297/54 36 MPH S 1/3 51/39/45/+18/0.26/0/006/01 40 MPH SSW 1/4 42/36/39/+12/0.41/0/006/01 25 MPH NNE 1/5 36/24/30/+3/0.15/1.8/0/0 22 MPH NNE 1/6 35/22/29/+3/0.89/5.2/0.0 30 MPH NE 1/7 36/26/31/+5/0/0/0/0/349/63 44 MPH W Aero 46 MPH W 1/8 32/26/29/+3/0.86/1.0/000/00 25 MPH N 1/9 29/21/25/-1/0/0/011/02 22 MPH NNW 1/10 38/28/33/+7/T/T/017/03 36 MPH SSW Aero 42 MPH SSW 1/11 32/26/29/+3/0.05/0.5/106/19 27 MPH WSW 1/12 37/26/32/+6/0.56/1.5/000/00 33 MPH ENE 1/13 56/30/43/+17/T/0/000/00 46 MPH S 1/14 61/30/46/+20/0.63/T/000/00 68 MPH S Aero 67 MPH S 1/15 30/21/26/0/0/0/277/49 31 MPH NW 1/16 28/19/24/-2/0.28/2.2/000/00 36 MPH N Aero 38 MPH N 1/17 23/08/16/-10/0.07/0.6/097/17 35 MPH WNW 1/18 11/0/6/-20/T/T/.../.. 38 MPH W 1/19 MORNING LOW -3F DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JANUARY 19 HIGH 59F IN 1973 LOW -11F IN 1887 PRECIP 2.34 INCHES IN 1936 SNOWFALL 10.5 INCHES IN 1936 PEAK GUST 93e MPH WNW IN 1943 RECORDS FOR JANUARY 20 HIGH 59F IN 1951 LOW -09F IN 1901 PRECIP 1.95 INCHES IN 1978 SNOWFALL 19.0 INCHES IN 1978 [RECORD FOR MONTH] PEAK GUST 76e MPH NE IN 1978 TODAY'S REPORT BY: Andrew Hoell