BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, OCTOBER 28, 2009 ALL TIMES ARE IN EASTERN STANDARD TIME LIGHT RAIN, DRIZZLE AND HEAVY FOG WITH INCREASING NORTHEAST WINDS GUSTING OVER 30 MPH EARLY THIS AFTERNOON We have been heavily fogged in with 1/16 mile visibility all day today while light rain and drizzle have been occurring since early this morning with a total of close to one quarter inch by early afternoon. Northeast winds are becoming increasingly gusty well over 30 MPH at times by early afternoon. A peak gust to 38 MPH NE was recorded just after 2:30 p.m. EDT. Today's observations: 7 A.M. Weather: Obscurement with heavy fog, light rain occurring Temperature: 48F, Dew point: 48F, Wind: NNE E at 12 kts Sea-level pressure: 30.31 inches Hg, rising Visibility: 1/16 mile 6-hour minimum temp: 47F 24-hour precipitation: 0.20 inch BHO SA 1155 W2 X 1/16R-F 180/48/48/0315G22/006/ WND 36V07/ 8//// 58001 MANUAL 6019/ ASOS 60019 MANUAL 70020 ASOS 70020 10048 20047 10 A.M. Weather: Obscurement with heavy fog, light drizzle occurring Temperature: 49F, Dew point: 49F, Wind: NE at 13G24 kts, Wind: Peak wind gust 26 kts NE @ 9:26 a.m. Wind: Direction variable from north to east Sea-level pressure: 30.01 inches Hg, falling Visibility: 1/16 mile 3-hourly precip: 0.03 inch BHO SA 1455 W2 X 1/16L-F 162/49/49/0513G24/001/ PK WND 0526/18/ WND 01V08/ 8//// 56018 ASOS 60003 MANUAL 6003/ 1 P.M. Weather: Obscurement with heavy fog and light drizzle occurring Temperature: 50F, Dew point: 50F, Wind: NE at 17G28 kts, Wind: Peak wind 32 kts ENE at 12:19 p.m. Wind: Direction variable north to east Sea-level pressure: 29.88 inches Hg, falling Visibility: 1/16 mile 6-hour maximum temp: 50F 6-hour precipitation: 0.06 inch BHO SA 1755 W2 X 1/16L-F 120/50/50/0417G28/988/ PK WND 0632/19/ WND 36V09/ 8//// 56042 MANUAL 6006/ ASOS 60006 10050 20048 WEATHER SUMMARY FOR TUESDAY, OCTOBER 27 TEMPERATURE (DEGREES F) MAX.....50 NORMAL.....56 MIN.....43 NORMAL.....40 MEAN....47 NORMAL.....48 DEPARTURE FROM 30-YEAR AVERAGE...........-1 TOTAL DEPARTURE FOR THE MONTH...........-58 [-2.3 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............18 DEPARTURE.......+1 TOTAL HEATING UNITS FOR THE MONTH...........402 DEPARTURE......+51 TOTAL HEATING UNITS FOR THE SEASON..........559 DEPARTURE......+39 TOTAL HEATING UNITS LAST SEASON TO DATE.....446 DIFFERENCE....+113 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............24 NNE AT 6:54 P.M. AEROVANE..............21 NNE AT 6:54 P.M. ASOS..................22 NNE AT 6:54 P.M. DAVIS.................22 N AT 7:09 P.M. FASTEST MILE FOR YESTERDAY...............16 E AT 8:48 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE............15 NNE AT 7:13 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........16 E AT 8:49 A.M. AVERAGE WIND SPEED AND DIRECTION.......10.0 E ASOS................10.1 DAVIS................9.5 ENE [070 DEG] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.20 DEPARTURE....+0.05 ASOS..............0.20 TOTAL PRECIPITATION FOR MONTH..............6.37 DEPARTURE....+2.55 ASOS..............6.38 TOTAL PRECIPITATION FOR THE YEAR..........44.25 DEPARTURE....+2.83 ASOS.............45.44 PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2009 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 10/1 56/39/48/-9/0/155/22 27 WSW 10/2 60/40/50/-6/0/442/63 23 SSE 10/3 63/51/57/+1/1.10/000/00 32 ESE AERO 30 MPH ESE 10/4 67/57/62/+6/0/202/29 21 WSW 10/5 64/49/57/+2/0/595/86 33 W AERO 31 MPH W 10/6 65/45/55/0/0/628/91 25 W 10/7 67/51/59/+4/0.70/344/50 54 W AERO 54 MPH W 10/8 61/48/55/+1/0/602/88 43 W AERO 39 MPH W 10/9 60/48/54/0/0.05/000/00 29 SSE 10/10 62/42/52/-2/0.26/205/30 37 NW 10/11 61/39/50/-3/0/655/97 35 WSW AERO 33 MPH W 10/12 53/36/45/-8/T/471/70 23 SSW 10/13 51/36/44/-8/0.20/074/11 35 WNW 10/14 52/32/42/-10/0/494/74 27 NW 10/15 41/32/37/-15/0.19/000/00 29 NNE 10/16 41/33/37/-14/0.24/000/00 37 NNE AERO 35 MPH NNE T SNOW 10/17 48/33/41/-10/0/250/38 35 NNE 10/18 46/32/39/-12/1.79/000/00 43 NNE SNOWFALL 3.0 INS 10/19 52/33/43/-8/0/628/96 25 NNW 10/20 65/38/52/+2/0/566/87 23 W 10/21 68/48/58/+8/0/363/56 19 W 10/22 74/50/62/+12/0/265/41 30 S 10/23 57/38/48/-1/T/000/00 * 35 NW AERO 32 MPH NW 10/24 67/42/55/+6/1.58/000/00 53 S AERO 51 MPH S 10/25 64/44/54/+5/0.06/.../.. 35 W AERO 35 MPH W 10/26 59/40/50/+2/0/.../.. 27 NW 10/27 50/43/47/-1/0.01/000/00 24 NNE 10/28 our morning low temp: 47F; the normal low is now 39F * a trace of precipitation added for 23rd NEW DAILY RECORDS FOR OCTOBER 2009 10/7: NEW RECORD WIND GUST 54 MPH W AT 2005E; surpasses previous record of 52 MPH ESE in 1972 10/15: NEW RECORD LOW MAXIMUM TEMPERATURE 41; surpasses previous 47 set in 1887 and 1896 10/16: NEW RECORD LOW MAXIMUM TEMPERATURE 41; surpasses previous 42 set in 1940 10/16: NEW RECORD DAILY SNOWFALL TRACE; surpasses previous zero for the date 10/18: NEW RECORD DAILY SNOWFALL 3.0 INS; surpasses previous trace in 1972 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 28 HIGH 81 IN 1919 LOW 23 IN 1914 PRECIP 2.46 INCHES IN 2006 SNOWFALL TRACE IN 1934,1957,1979 PEAK GUST 71 MPH SSW IN 1995 RECORDS FOR OCTOBER 29 HIGH 74 IN 1989 LOW 23 IN 1891 PRECIP 2.27 INCHES IN 1953 SNOWFALL 1.5 INCHES IN 2005 PEAK GUST 69 S IN 2003 TODAY'S REPORT PREPARED BY: Robert Skilling