BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, NOVEMBER 23, 2010 ALL TIMES ARE IN EASTERN STANDARD TIME WARM AND HAZY Southerly winds which dominated the pattern yesterday continued today, pumping a warm, moist air mass into the region. With a morning low of only 50F and a high of at least 60F through 1PM EST, the average temperature for today will be 10-15 degrees above average. Cooler air is in the forecast, but will it be cool enough to cause the average temperature for November to dip below average? We will have to wait and see... Visibility is being limited by the added moisture in the air. Visibility is 20 miles this afternoon, an improvement over this mornings visibility of only 9 miles. Light rain showers Monday night provided 0.01 inch of rainfall. Today's observations: 7 A.M. Weather: Broken altocumulus, broken thin cirrus, few altocumulus lenticulars SSE-SW-WNW, cirrus ENE-E and SSE-SW, thin fog/haze Temperature: 50F, Dew point: 49F; Wind: S @ 12 kts, Sea-level pressure: 29.96 inches Hg, falling Visibility: 9 miles, thin fog/haze 6-hour minimum temp: 50F 24-hour rainfall: 0.01 inch BHO SA 1155 E65 BKN 250 –BKN 9 146/50/49/1912/996/ FEW ACSL SSE-SW-WNW CI ENE-E AND SSE-SW THN FG/HZ/ 8/041 56017 MANUAL 70001 ASOS 70001 10052 20050 10 A.M. Weather: Scattered altocumulus, scattered cirrostratus, broken thin cirrus, altocumulus lenticularus distant W-NNW and distant NNE-ENE, moderate top altocumulus distant NE, patches of dense cirrus all quadrants, few cirrocumulus E and overhead, virga N, hazy Temperature: 55F, Dew point: 50F; Wind: S at 9 kts, Sea-level pressure: 29.91 inches Hg, falling Visibility: 17 miles, hazy BHO SA 1455 80 SCT E220 SCT 250 –BKN 17 128/55/50/1809/991/ ACSL DSNT W-NNW AND DSNT NNE-ENE MDT TOP AC DSNT NE PTCHS DNS CI ALQDS FEW CC E AND OVHD VIRGA N HAZY/ 8/042 58018 1 P.M. Weather: Scattered altocumulus, broken cirrostratus, overcast cirrus, altocumulus lenticularus WNW-N-SE, dense cirrus all quadrants except overhead, partial halo, hazy Temperature: 60F, Dew point: 50F; Wind: S at 13 kts, Sea-level pressure: 29.80 inches Hg, falling Visibility: 20 miles, hazy 6-hour max. temp: 60F BHO SA 1755 100 SCT E200 BKN 220 OVC 20 093/60/50/1813/980/ ACSL WNW-N-SE DNS CI ALQDS XCPT OVHD PARTIAL HALO HAZY/ 8/047 58035 10060 20050 WEATHER SUMMARY FOR MONDAY, NOVEMBER 22 TEMPERATURE (DEGREES F) MAX.....53 NORMAL.....47 MIN.....31 NORMAL.....32 MEAN....42 NORMAL.....40 DEPARTURE FROM 30-YEAR NORMAL.................+2 TOTAL DEPARTURE FOR THE MONTH.................+9 [+0.2 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............23 DEPARTURE........-2 TOTAL HEATING UNITS FOR THE MONTH...........471 DEPARTURE.......-10 TOTAL HEATING UNITS FOR THE SEASON..........948 DEPARTURE......-124 TOTAL HEATING UNITS LAST SEASON TO DATE.....998 DIFFERENCE......-50 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............32 SSE AT 11:07 A.M. * AEROVANE..............33 S AT 11:48 A.M. * ASOS..................33 S AT 11:07 A.M. DAVIS.................33 S AT 11:04 A.M. THE FASTEST MILE FOR YESTERDAY...........26 S AT 7:30 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE............24 SSW AT 6:51 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........24 SSE AT 11:05 A.M. AVERAGE WIND SPEED AND DIRECTION........16.6 S ASOS.................16.1 DAVIS................15.7 SSE [161 DEG] *last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01 DEPARTURE........-0.15 ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH..........4.19 DEPARTURE........+0.75 ASOS..............4.24 TOTAL PRECIPITATION FOR THE YEAR..........57.91 DEPARTURE.......+12.45 ASOS.............57.79** ** ASOS missing rainfall due to system failure on 6/24-25 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.1 DEPARTURE.....-1.8 TOTAL SNOWFALL FOR THE SEASON...............0.1 DEPARTURE.....-2.0 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2010 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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 49/29/39/-8/0.00/446/72 24 WNW 11/2 46/33/40/-6/0.00/271/44 21 NW 11/3 50/28/39/-7/0.00/264/43 20 SSE 11/4 54/37/46/0/0.91/000/00 43 NNE AERO 45 MPH NE 11/5 59/44/52/+7/0.51/000/00 36 S AERO 39 MPH S 11/6 48/38/43/-2/000/0.0/134/22 20 N 11/7 42/33/38/-7/0.17/T/012/02 32 NW 11/8 47/32/40/-4/1.17/0.1/000/00 60 N AERO 60 MPH N 11/9 50/42/46/+2/0.21/0.0/006/01 32 N AERO 35 MPH N 11/10 45/39/42/-2/0.17/0.0/006/01 38 N AERO 42 MPH N 11/11 45/37/41/-2/0.00/0.0/411/69 43 NNE AERO 43 MPH NNE 11/12 53/35/44/+1/0.00/0.0/594/100 23 N 11/13 61/42/52/+9/0.00/0.0/592/100 20 N 11/14 50/41/46/+4/0.00/0.0/153/26 25 NNE 11/15 52/44/48/+6/0.00/0.0/.../.. 15 SE 11/16 54/46/50/+8/.../0.0/.../.. 20 E 11/17 62/46/54/+13/.../0.0/.../.. 45 WSW AERO 48 MPH WSW 11/18 52/37/45/+4/0.00/0.0/.../.. 51 W AERO 55 MPH W 11/19 43/32/38/-3/0.00/0.0/.../.. 26 W 11/20 51/31/41/+1/0.00/0.0/.../.. 40 W AERO 44 MPH W 11/21 37/29/33/-7/0.00/0.0/.../.. 22 NW 11/22 53/31/42/+2/0.01/0.0/.../.. 32 SSE AERO 33 MPH SSE 11/23 our morning low temp: 50F; the normal low is now 32F NEW DAILY RECORDS FOR NOVEMBER 2010 None so far DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 23 HIGH 73 IN 1931 LOW 9 IN 1888 PRECIP 2.33 INS IN 2006 SNOWFALL 5.5 INS IN 1989 PEAK GUST 64e S IN 1953 RECORDS FOR NOVEMBER 24 HIGH 69 IN 1931 LOW 7 IN 1897 PRECIP 1.76 INCHES IN 1901 SNOWFALL 4.5 INS IN 1936 PEAK GUST 69 SSW IN 1959 TODAY'S REPORT PREPARED BY: Sean Fankhauser