BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, NOVEMBER 13, 2009 ALL DATA IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Overcast stratus Temperature: 46F, Dew point: 45F, Wind: NNE at 15G29 kts, Wind: Peak gust past hour 29 kts NNE at 6:54 A.M. Wind: Direction variable N to E Sea-level pressure: 30.21 inches Hg, rising Visibility: 10 miles, thin fog 6-hour minimum temp: 45F 24-hour precip: 0.00 BHO SA 1155 E8 OVC 10 229/46/45/0315G29/021/ PK WND 0329/54 WND 36V08 THN FG/ 8/6// 53008 10046 20045 10 A.M. Weather: Overcast stratus Temperature: 47F, Dew point: 45F, Wind: NE at 18G29 kts, Wind: Peak gust 34 kts NNE at 9:34 A.M. Wind: Direction variable from NNW to E Sea-level pressure: 30.23 inches Hg, rising Visibility: 15 miles, thin fog BHO SA 1455 E10 OVC 15 236/47/45/0418G29/023/ PK WND 0334/34 WND 34V09 THN FG / 8/6// 53007 1 P.M. Weather: Overcast stratus Temperature: 48F, Dew point: 44F, Wind: NNE at 16G31 kts, Wind: Peak gust 34 kts NNE at 12:04 P.M. Wind: Direction variable NNW to E Sea-level pressure: 30.18 inches Hg, falling Visibility: 12 miles, thin fog 6-hourly max. temp: 48F BHO SA 1755 E10 OVC 12 219/48/44/0316G31/018/ PK WND 0334/04 WND 33V09 THN FG/ 8/6// 56017 10048 20046 WEATHER SUMMARY FOR THURSDAY, NOVEMBER 12 TEMPERATURE (DEGREES F) MAX.....49 NORMAL.....51 MIN.....41 NORMAL.....35 MEAN....45 NORMAL.....43 DEPARTURE FROM 30-YEAR AVERAGE............+2 TOTAL DEPARTURE FOR THE MONTH............+28 [+2.1 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............20 DEPARTURE........-2 TOTAL HEATING UNITS FOR THE MONTH...........214 DEPARTURE.......-29 TOTAL HEATING UNITS FOR THE SEASON..........835 DEPARTURE........+1 TOTAL HEATING UNITS LAST SEASON TO DATE.....744 DIFFERENCE......+91 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............34 NE AT 10:04 A.M. AEROVANE..............31 NNE AT 2:48 P.M. * ASOS..................32 NE AT 8:07 P.M. DAVIS.................32 NE AT 10:04 A.M. FASTEST MILE FOR YESTERDAY...............23 NE AT 7:24 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE............22 ENE AT 7:24 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........23 NE AT 10:05 A.M. AVERAGE WIND SPEED AND DIRECTION.......15.4 NNE ASOS................14.6 DAVIS...............14.7 NE [038 DEG] * last of several occurrences 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 MONTH ............0.06 DEPARTURE....-1.78 ASOS..............0.04 TOTAL PRECIPITATION FOR THE YEAR..........45.17 DEPARTURE....+1.31 ASOS.............46.35 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE.....-0.9 TOTAL SNOWFALL FOR THE SEASON...............3.0 DEPARTURE.....+1.9 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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 11/1 58/44/51/+4/0.05/167/27 22 WNW 11/2 49/42/46/0/T/099/16 29 NE 11/3 57/36/47/+1/0/474/77 32 W AERO 32 MPH W 11/4 49/34/42/-4/0/514/84 24 W 11/5 46/36/41/-4/0.01/006/01 21 N 11/6 47/31/39/-6/0/419/69 38 WNW AERO 38 MPH WNW 11/7 49/29/39/-6/0/575/95 33 S 11/8 66/42/54/+10/0/549/91 31 SSW 11/9 68/49/59/+15/0/486/81 35 S AERO 35 MPH S 11/10 62/50/56/+12/0/000/00 23 SW 11/11 50/43/47/+4/0/113/19 31 NNE 11/12 49/41/45/+2/0/.../.. 34 NE AERO 31 MPH NNE 11/13 our morning low temp: 45F; the normal low is now 35F NEW DAILY RECORD FOR NOVEMBER 2009 None DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 13 HIGH 66 IN 1931, 1964 LOW 14 IN 1920 PRECIP 1.96 IN 1982 SNOWFALL 4.6 IN 2004 PEAK GUST 77 S IN 1982 RECORDS FOR NOVEMBER 14 HIGH 70 IN 1993 LOW 11 IN 1905 PRECIP 1.87 IN 1972 SNOWFALL 3.5 IN 1997 PEAK GUST 63 W IN 2003 TODAY'S REPORT PREPARED BY: Stephanie Radner