BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, NOVEMBER 20, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Clear with a few altocumulus Temperature: 35F, Dew point: 25F, Wind: SSW at 12 kt Sea-level pressure: 30.21 inches Hg, steady Visibility: 15 miles BHO SA 1155 CLR 15 232/35/25/2112/021/ FEW AC OFFSHR NE-SE HAZY/ 8/070 55004 10036 20034 10 A.M. Weather: Clear with a few cirrus Temperature: 44F, Dew point: 25F, Wind: SW at 10 kt Sea-level pressure: 30.20 inches Hg, falling Visibility: 25 miles BHO SA 1455 CLR 25 228/44/25/2110/020/ FEW CI SW-W HAZY/ 8/001 58004 WEATHER SUMMARY FOR SATURDAY, NOVEMBER 19 TEMPERATURE (DEGREES F) MAX.....43 NORMAL.....48 ASOS.....43 AT 1:59 P.M. MIN.....26 NORMAL.....33 ASOS.....26 AT 6:49 A.M. MEAN....35 NORMAL.....41 DEPARTURE FROM 30-YEAR NORMAL.......-6 TOTAL DEPARTURE FOR THE MONTH......+79 (+4.0 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........30 DEPARTURE.....+6 TOTAL HEATING UNITS FOR THE MONTH.........326 DEPARTURE....-67 TOTAL HEATING UNITS FOR THE SEASON........787 DEPARTURE...-210 TOTAL HEATING UNITS LAST SEASON TO DATE...966 DIFFERENCE..-179 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.........21 SSW AT 9:05 P.M.* AEROVANE..........25 SSW AT 9:20 P.M. ASOS..............21 SSW AT 9:20 P.M. DAVIS.............22 SSW FASTEST MILE FOR YESTERDAY...........20 SSW AT 9:14 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE........18 SSW AT 9:20 P.M. AVERAGE WIND SPEED AND DIRECTION....8.9 SSW ASOS.............9.4 *LAST OF SEVERAL OCCURANCES 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..........1.64 DEPARTURE....-1.32 ASOS..............1.60 TOTAL PRECIPITATION FOR THE YEAR..........59.26 DEPARTURE...+14.43 ASOS.............58.15* *EXCLUDES 3.19 INCHES OF ERRONEOUS PRECIPITATION RECORDED FROM 1/23-1/28. 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....-1.8 TOTAL SNOWFALL FOR THE SEASON...............1.5 DEPARTURE....-0.3 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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 11/1 70/48/59/+12/0/0/446/72 39 MPH S Aero 40 MPH S 11/2 56/39/48/+2/T/0/543/88 37 MPH WNW Aero 39 MPH WNW 11/3 62/36/49/+3/0/0/449/73 50 MPH S Aero 52 MPH S 11/4 69/46/58/+12/0/0/465/76 29 MPH SSE Aero 30 MPH SSE 11/5 71/47/59/+14/0/0/268/44 18 MPH S 11/6 57/49/53/+8/0.25/0/000/00 31 MPH SSW Aero 36 MPH SSW TSTM 11/7 57/45/51/+6/0.01/0/430/71 47 MPH W Aero 48 MPH W 11/8 60/42/51/+7/0/0/265/44 35 MPH W Aero 36 MPH W 11/9 57/34/46/+2/0.20/258/43 36 MPH SSE Aero 41 MPH SSE 11/10 58/32/45/+1/0.46/102/17 37 MPH W Aero 44 MPH W TSTM 11/11 41/29/35/-8/0/0/536/90 29 MPH W 11/12 51/26/39/-4/0/0/594/100 18 MPH W 11/13 62/41/52/+9/0/0/496/84 30 MPH S Aero 37 MPH S 11/14 63/44/54/+12/T/0/524/89 31 MPH WSW Aero 37 MPH WSW 11/15 53/42/48/+6/0.09/0/000/00 22 MPH E 11/16 65/47/56/+14/N/A/0/037/05/ 54 MPH S Aero 58 MPH S 11/17 47/30/39/-2/0.19/0/.../.. 28 MPH W 11/18 38/26/32/-9/0/0/.../.. 30 MPH W 11/19 43/26/35/-6/0/0/.../.. 21 MPH SSW DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 20 HIGH 72F IN 1953 LOW 10F IN 1894 PRECIP 2.78 INCHES IN 1988 SNOWFALL 3.0 INCHES IN 1897 PEAK GUST 73e MPH S IN 1950 RECORDS FOR NOVEMBER 21 HIGH 69F IN 1931 LOW 10F IN 1888 PRECIP 2.60 INCHES IN 1950 SNOWFALL 4.0 INCHES IN 1929 PEAK GUST 69 MPH NW IN 1989 TODAY'S REPORT BY: Andrew Hoell