BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, NOVEMBER 3, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME COOLER AND PARTLY CLOUDY WITH LIGHT WINDS TODAY... EASTERN STANDARD TIME RETURNS TONIGHT...TURN CLOCKS BACK ONE HOUR... Low clouds earlier today parted to leave the sky partly sunny today. The low temperature of 38 F this morning was the coldest temperature since mid-October, though it was actually a degree warmer than normal for today's date. Visibility has been excellent near 80 miles all day. October 2012 finished as the 12th warmest on record, with records going back to 1885. OCTOBER 2012 PRELIMINARY STATS TEMPERATURE: Average Max Temp: 62.5F [+2.2F] Average Min Temp: 47.0F [+4.1F] Mean Temp: 54.8F [+3.2F] 24-hr. Corr. Mean Temp: 54.4F Max Temp: 77F on 6th Min Temp: 29F on 13th Total heating degree day units (month): 309 [-112] Total heating degree day units (season): 408 [-155] *start July 1 PRECIPITATION: Total precipitation: 4.58 ins. [-0.11 in.] Greatest 24-hr precipitation: 2.42 ins. on 28th/29th Total snowfall: 0.0 inch [-0.3 inch] *updated to use 1891-2010 mean WIND: Avg wind speed: 11.9 MPH Avg corrected wind speed: 12.3 MPH Prevailing wind direction: W [14%] Peak gust: 76 MPH E on 29th Peak fastest mile: 58 MPH E on 29th SUNSHINE: Total astronomical minutes: 9,193 of possible 20,551 or 45% Total Campbell-Stokes card minutes: 8,886 of possible 19,824 or 45% Today's observations: 7 A.M. Weather: Scattered stratocumulus, broken altocumulus, few lower stratocumulus NE-E and distant SE-S Temperature: 40F; Dew Point: 35F; Wind: WNW at 10 kts Sea-level pressure: 29.69 ins. Hg, rising Visibility: 80 miles 24-hour precip: 0.02 inch 6-hour min. temp: 38F BHO SA 1155 45 SCT E75 BKN 80 054/40/35/3010/969/ FEW LWR SC NE-E AND DSNT SE-S/ 8/570 53017 70002 10040 20038 10 A.M. Weather: Scattered stratocumulus, scattered altocumulus, scattered cirrus, few cumulus fractus all quadrants, few lower cumulus distant W-N, few stratocumulus lenticularis all quadrants, dense cirrus overhead-E-SE Temperature: 47F; Dew Point: 35F; Wind: WNW at 10 kts, Wind: Direction variable W-NNW Sea-level pressure: 29.73 ins. Hg, rising Visibility: 80 miles BHO SA 1455 75 SCT 100 SCT 200 SCT 80 068/47/35/3010/973/ FEW CUFRA ALQDS FEW LWR CU DSNT W-N FEW SCSL ALQDS DNS CI OVHD-E-SE WND 26V34/ 8/531 51014 1 P.M. Weather: Scattered cumulus, scattered altocumulus, few cumulus fractus all quadrants, few altocumulus lenticularis SSE-SW Temperature: 50F; Dew Point: 35F; Wind: WNW at 10G20 kts, Wind: Direction variable W-NNW Sea-level pressure: 29.71 ins. Hg, falling Visibility: 80 miles 6-hour max. temp: 52F BHO SA 1755 35 SCT 75 SCT 80 061/50/35/2910G20/971/ FEW CUFRA ALQDS FEW ACSL SSW-SW WND 26V32/ 8/130 56007 10052 20040 WEATHER SUMMARY FOR FRIDAY, NOVEMBER 2 TEMPERATURE (DEGREES F) MAX.....51 NORMAL.....55 MIN.....41 NORMAL.....37 MEAN....46 NORMAL.....46 DEPARTURE FROM 30-YEAR NORMAL......................0 TOTAL DEPARTURE FOR THE MONTH.....................+3 [+1.3 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............19 DEPARTURE.........0 TOTAL HEATING UNITS FOR THE MONTH............35 DEPARTURE........-3 TOTAL HEATING UNITS FOR THE SEASON..........443 DEPARTURE......-158 TOTAL HEATING UNITS LAST SEASON TO DATE.....468 DIFFERENCE......-25 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............24 WNW AT 1:35 P.M. AERO..................22 WNW AT 10:06 P.M. * ASOS..................23 W AT 1:35 P.M. DAVIS.................21 WNW AT 12:35 P.M. RMY 22 THE FASTEST MILE FOR YESTERDAY...........17 W AT 12:34 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............17 W AT 12:35 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........14 W AT 12:35 P.M. AVERAGE WIND SPEED AND DIRECTION.......10.0 WNW ASOS.................9.0 DAVIS................8.3 W [281 deg] * last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.02 DEPARTURE..........-0.13 ASOS..............0.01 TOTAL PRECIPITATION FOR THE MONTH..........0.02 DEPARTURE..........-0.29 ASOS..............0.01 TOTAL PRECIPITATION FOR THE YEAR..........33.22 DEPARTURE.........-10.86 ASOS.............33.19 PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2012 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust RMY: RMY = R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 10/1 66/47/57/0/T/429/61 36 W AERO 35 MPH WSW RMY 36 10/2 69/53/61/+4/0.12/098/14 18 W AERO 16 MPH W RNT 16 10/3 62/58/60/+4/0.02/000/00 20 NE AERO 18 MPH NE RMY 18 10/4 61/58/60/+4/0.08/000/00 17 NNE AERO 14 MPH NE RMY 14 10/5 75/57/66/+10/0.00/623/90 20 SW AERO 19 MPH SW RMY 21 10/6 77/48/63/+8/0.20/269/39 36 SSW AERO 37 MPH SSW RMY 36 TSTM 10/7 57/44/51/-4/0.15/185/27 21 WNW AERO 18 MPH WNW RMY 19 10/8 55/40/48/-6/0.00/328/48 17 WNW AERO 15 MPH WNW RMY N/A 10/9 56/49/53/-1/T/000/00 27 E AERO 25 MPH ENE RMY 25 10/10 60/47/54/0/0.22/000/00 36 WNW AERO 36 MPH WNW RMY 31 10/11 58/41/50/-3/0.00/668/99 35 WNW AERO 33 MPH WNW RMY 34 10/12 51/34/43/-10/0.04/296/44 32 WNW AERO 30 MPH NW RMY 30 10/13 52/29/41/-12/0.00/582/87 22 SSW AERO 20 MPH WNW RMY N/A 10/14 66/43/55/+3/0.09/167/25 40 SW AERO 39 MPH SW RMY 39 10/15 73/58/66/+14/0.03/279/42 43 SSW AERO 43 MPH SSW RMY 43 10/16 61/40/51/0/0.03/522/79 38 WNW AERO 36 MPH WNW RMY 38 10/17 60/35/48/-3/0.00/612/93 22 NW AERO 18 MPH NW RMY N/A 10/18 66/46/56/+5/0.00/636/97 25 ESE AERO 23 MPH ESE RMY 25 10/19 66/51/59/+9/0.20/007/01 39 SSE AERO 38 MPH SSE RMY 39 10/20 73/53/63/+13/0.11/377/58 33 SSW AERO 32 MPH SSW RMY 34 TSTM 10/21 63/45/54/+4/0.00/564/87 36 WNW AERO 32 MPH WNW RMY 34 10/22 65/46/56/+7/0.00/632/98 37 WNW AERO 35 MPH WNW RMY 36 10/23 64/46/55/+6/0.00/398/62 27 NW AERO 24 MPH NW RMY 26 10/24 53/46/50/+1/T/000/00 21 NNE AERO 20 MPH NNE RMY N/A 10/25 62/46/54/+5/0.00/618/97 17 S AERO 16 MPH SW RMY 17 10/26 67/49/58/+10/0.00/507/80 17 S AERO 16 MPH S RMY 16 10/27 65/50/58/+10/0.00/228/36 22 NNE AERO 20 MPH NNE RMY 22 10/28 54/49/52/+4/0.35/000/00 45 ENE AERO 46 MPH ENE RMY N/A 10/29 61/51/56/+9/2.42/000/00 76 E AERO 82 MPH E RMY N/A 10/30 66/53/60/+13/0.49/162/26 36 SSW AERO 36 MPH SSE RMY 36 10/31 55/45/50/+3/0.03/006/01 30 SW AERO 30 MPH SW RMY 30 11/1 56/42/49/+3/0.00/.../.. 28 SW AERO 28 MPH SW RMY 27 11/2 51/41/46/0/0.02/.../.. 24 WNW AERO 22 MPH WNW RMY 22 11/3 morning low temp: 38F; the normal low is now 37F DAILY RECORDS FOR OCTOBER 2012 10/13 - NEW DAILY RECORD LOW MINIMUM TEMPERATURE OF 29F; surpasses previous record of 30F set in 1934, 1936, 1988 10/29 - NEW DAILY RECORD PEAK WIND GUST OF 76 MPH E; surpasses previous record of 69 mph S in 2003 10/29 - NEW DAILY RECORD MAXIMUM PRECIPITATION OF 2.42 INCHES; surpasses previous record of 2.27 inches in 1953 DAILY RECORDS FOR NOVEMBER 2012 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 3 HIGH 75 IN 1990 LOW 21 IN 1891 PRECIP 1.92 INCHES IN 1951 SNOWFALL 0.1 IN 1951 PEAK GUST 96e SSE IN 1951 RECORDS FOR NOVEMBER 4 HIGH 77 IN 1987 LOW 22 IN 1891 PRECIP 3.27 INCHES IN 1910 SNOWFALL 6.4 IN 1945 PEAK GUST 73 WNW IN 1965 TODAY'S REPORT PREPARED BY: Mike Iacono/Peter Volpe