BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, NOVEMBER 2, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME CLOUDY AND COOL WITH A FEW SPRINKLES The sky has remained mostly cloudy today, with a few sprinkles reaching the summit from those clouds this afternoon. Visibility has been fairly good, reaching 75 miles. The cloud cover is keeping temperatures in check. The high so far today of only 51F is a few degrees below the normal, but our low of 43F was a few degrees above the normal. Today could be our first at or below normal day since October 17. 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 [-0.2 inch] *using 1891-2000 normals 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 cumulus/stratocumulus, broken altocumulus (2 levels), broken altostratus, cumulus/stratocumulus distant W-NNW and distant S-SSW, and along/offshore distant NE-ESE, altocumulus lenticularis all quadrants, thin smoke layer along horizon N-ENE and ESE-SSW Temperature: 43F; Dew Point: 40F; Wind: W at 7 kts. Sea-level pressure: 29.57 ins. Hg, steady then rising slightly Visibility: 75 miles, light distant haze, mountain NW 65 miles in cloud 6-hour min. temp: 43F BHO SA 1155 30 SCT E60 BKN 80 BKN 140 BKN 75 015/43/40/2607/957/ CU/SC ALG/OFFSHR DSNT NE-ESE AND DSNT S-SSW AND DSNT W-NNW ACSL ALQDS THN K LYR ALG HRZN N-ENE AND ESE-SSW LGT DSNT HZ MTN INCLD NW 65/ 8/540 53003 10044 20043 10 A.M. Weather: Scattered cumulus, broken stratocumulus, broken altocumulus (2 levels), broken altostratus, few moderate cumulus offshore distant E, altocumulus lenticularis all quadrants, rain shower distant SSE and distant SSW moving NE, light distant haze Temperature: 48F; Dew Point: 38F; Wind: W at 9 kts, Wind: Direction variable WSW-NW Sea-level pressure: 29.57 ins. Hg, rising slightly Visibility: 75 miles, light distant haze, mountain NW 65 miles in cloud BHO SA 1455 30 SCT E45 BKN 60 BKN 80 BKN 140 BKN 75 017/48/38/2809/958/ FEW MDT CU OFFSHR DSNT E ACSL ALQDS SHRA DSNT SSE AND DSNT SSW LGT DSNT HZ MTN INCLD NW 65 WND 24V31/ 8/140 51002 1 P.M. Weather: Light rain shower, scattered cumulus/stratocumulus, broken altostratus, few moderate cumulus offshore distant ENE, rain shower/ virga in the vicinity of the station and distant SSE-SW-W moving NE, light distant haze Temperature: 49F; Dew Point: 36F; Wind: WNW at 9 kts, Wind: Direction variable W-NNW Sea-level pressure: 29.55 ins. Hg, rising Visibility: 75 miles, very light rain shower, light distant haze 6-hour max. temp: 51F 6 hour precip: Trace BHO SA 1755 35 SCT E80 BKN 75RW- 007/49/36/2909/955/ FEW MDT CU OFFSHR DSNT ENE SHRA/VIRGA VCTY STN AND DSNT SSE-SW-W MOVG NE LGT DSNT HZ WND 26V33 RW- B45 CTD VRY LGT AND INTMT/ 8/570 56010 MANUAL 6000/ 10051 20043 WEATHER SUMMARY FOR THURSDAY, NOVEMBER 1 TEMPERATURE (DEGREES F) MAX.....56 NORMAL.....55 MIN.....42 NORMAL.....38 MEAN....49 NORMAL.....46 DEPARTURE FROM 30-YEAR NORMAL.....................+3 TOTAL DEPARTURE FOR THE MONTH.....................+3 [+3.0 DEGREE/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............16 DEPARTURE........-3 TOTAL HEATING UNITS FOR THE MONTH............16 DEPARTURE........-3 TOTAL HEATING UNITS FOR THE SEASON..........424 DEPARTURE......-158 TOTAL HEATING UNITS LAST SEASON TO DATE.....447 DIFFERENCE......-23 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............28 SW AT 10:22 A.M. * AERO..................28 SW AT 10:18 A.M. ASOS..................28 SW AT 10:21 A.M. DAVIS.................26 SW AT 10:17 A.M. RMY 27 THE FASTEST MILE FOR YESTERDAY...........19 SW AT 10:22 A.M. * MAXIMUM 2-MINUTE ASOS AVERAGE............21 SW AT 10:22 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........20 SSW AT 10:18 A.M. AVERAGE WIND SPEED AND DIRECTION........9.9 SW ASOS.................9.9 DAVIS................9.1 SW [222 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 THE MONTH..........0.00 DEPARTURE..........-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE YEAR..........33.20 DEPARTURE.........-10.73 ASOS.............33.18 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 morning low temp: 43F; 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 2 HIGH 81 IN 1950 LOW 22 IN 1965 PRECIP 1.67 INCHES IN 1970 SNOWFALL 0.2 IN 1906,1951 PEAK GUST 63 WSW IN 1973 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 TODAY'S REPORT PREPARED BY: Sean Fankhauser