BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, NOVEMBER 6, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME TEMPERATURES RISING THROUGH THE 50'S IN WARMING TREND SUNSHINE THROUGH VARIABLE MIDDLE AND HIGH CLOUDS Last night's low temperature of 39 degrees occurred just before midnight and has been rising ever since then. Early this afternoon under partly to mostly sunny skies the temperatures has risen through the 50's to near 60 degrees as the warming trend begins. Through October 31, the average temperature for the year-to-date has climbed to 9th warmest; its highest ranking all year. The year-to-date wind speed is holding at second lowest on record. The Aerovane wind system was restored to service at 1322E today, 11/6. Thank you to our new technician Harris Pitnof. OCTOBER 2013 PRELIMINARY STATISTICS: (departures relative to 1981-2010 average) TEMPERATURE: Average Max Temp: 62.5F [+2.2F] Average Min Temp: 45.9F [+3.0F] Mean Temp: 54.2F [+2.6F] 24-hr. Corr. Mean Temp: 53.4F [+2.0F] Max Temp: 78F on 2nd Min Temp: 30F on 29th (first freeze of the season) Total heating degree day units (month): 331 [-90] *NCDC method Total heating degree day units (season): 477 [-86] *start July 1 (NCDC) Total cooling degree day units (month): 5 [0] *NCDC method Total cooling degree day units (season): 701 [+99] *start Jan 1 (NCDC) PRECIPITATION: Total precipitation: 1.09 inches [-3.60 inches] Greatest 24-hr precipitation: 0.56 on 10/6 WIND: Avg wind speed: 10.7 MPH Avg corrected wind speed: 11.2 MPH Prevailing wind direction: W [17%] Peak gust: 48 MPH S on the 7th Peak fastest mile: 40 MPH S on the 7th SUNSHINE: Total astronomical minutes: 11,757 (196.0 hrs.) out of possible 20,551 minutes (342.5 hrs.) or 57% Total Campbell Stokes card minutes; 11,358 (189.3 hrs.) out of possible 19,824 minutes (330.4 hrs.) or 57% BHO DRIEST OCTOBERS (INCHES, 1886-2013) 1) 0.22 in 1924 2) 0.39 in 1994 3) 0.50 in 1946 4) 0.61 in 1935 5) 0.63 in 1897 6) 0.79 in 2001 7) 1.09 in 2013 8) 1.15 in 1918 9) 1.24 in 1921 10) 1.25 in 1940 BHO LOWEST OCTOBER WIND SPEED (MPH, 1885-2013) 1) 11.2 in 2013 2) 11.8 in 1997 3) 11.9 in 1994 11.9 in 2004 5) 12.0 in 2007 6) 12.2 in 2008 BHO LOWEST JAN-OCT WIND SPEED (MPH, 1885-2013) 1) 11.7 in 2012 2) 12.1 in 2013 3) 12.2 in 2008 12.2 in 2009 5) 12.4 in 2005 12.4 in 2011 Today's Observations: 7 A.M. Weather: Broken altocumuus (2 layers), broken cirrus, virga along horizon distant ESE Temperature: 43F; Dew Point: 37F; Wind: S at 10 kts. Sea-level pressure: 30.45 ins. Hg, falling slightly Visibility: 50 miles, distant haze mostly SW-NW 6-hr min temp: 40F BHO SA 1155 E130 BKN 150 BKN 250 BKN 50 313/43/37/1910/045/ DSNT HZ MSTLY SW-NW VIRGA ALG HRZN DSNT ESE/ 8/071 57007 10043 20040 10 A.M. Weather: Broken altocumulus, broken cirrus, thin overcast cirrus, thin spots in overcast, breaks in overcast Temperature: 51F; Dew Point: 39F; Wind: S at 11 kts, Sea-level pressure: 30.40 ins. Hg, falling Visibility: 50 miles, WNW 45 miles, NE-E 60 miles BHO SA 1455 E130 BKN 220 BKN 250 –OVC 50 293/51/39/1911/040/ OVC PTLY THN BINOVC ALQDS VSBY WNW 45 HZY VSBY NE-E 60/ 8/031 58020 1 P.M. Weather: Scattered altocumulus lenticularis, large patch vicinity, scattered cirrocumulus, scattered cirrus, thin broken cirrus Temperature: 56F; Dew Point: 40F; Wind: SSW at 16 kts, Sea-level pressure: 30.31 ins. Hg, falling Visibility: 60 miles, distant haze 6-hr max temp: 58F BHO SA 1755 180 SCT 220 SCT 250 –SCT 300 –BKN 60 263/56/40/2016/031/ CU FRMG XCPT N-NE AC/LGE PTCH ACSL VC OVHD-S-W FEW PTCHS CC DSNT HZ/ 8/141 58030 10058 20043 WEATHER SUMMARY FOR TUESDAY, NOVEMBER 5, 2013 TEMPERATURE (DEGREES F) MAX.....50 NORMAL.....54 MIN.....29 NORMAL.....37 MEAN....40 NORMAL.....45 DEPARTURE FROM 30-YEAR NORMAL......................-5 TOTAL DEPARTURE FOR THE MONTH......................+6 [+1.0 DEGREE/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............25 DEPARTURE........+15 TOTAL HEATING UNITS FOR THE MONTH..............96 DEPARTURE......... 0 TOTAL HEATING UNITS FOR THE SEASON............573 DEPARTURE........-87 TOTAL HEATING UNITS LAST SEASON TO DATE.......513 DIFFERENCE.......+60 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................16 SSW AT 10:00 A.M. AERO......................N/A ASOS.......................17 SSW AT 10:56 P.M. DAVIS......................16 S AT 7:16 P.M. RMY 17 FASTEST MILE FOR YESTERDAY....................13 S AT 7:16 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................13 SSW AT 11:40 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................13 S AT 7:18 P.M. AVERAGE WIND SPEED AND DIRECTION.............7.3 S ASOS......................7.2 DAVIS.....................6.6 SSW [210 degrees] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE.............-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.16 DEPARTURE.............-0.62 ASOS..............0.16 TOTAL PRECIPITATION FOR THE YEAR..........43.17 DEPARTURE.............-1.38 ASOS..............N/A** **ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........0.0 DEPARTURE.............-0.1 TOTAL SNOWFALL FOR THE MONTH.............Trace DEPARTURE.............-0.2 TOTAL SNOWFALL FOR THE SEASON............Trace DEPARTURE.............-0.5 PRELIMINARY CLIMATE SUMMARY FOR OCTOBER & NOVEMBER 2013 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 75/50/63/+6/0.00/676/96 16 WNW AERO 16 MPH WNW RMY 18 10/2 78/56/67/+10/0.00/666/95 29 W AERO 30 MPH W RMY 29 10/3 77/56/67/+11/0.00/628/90 20 WNW AERO 20 MPH WNW RMY N/A 10/4 67/56/62/+6/0.26/028/04 18 NW AERO 20 MPH NW RMY N/A 10/5 67/56/62/+6/0.01/125/18 14 ENE AERO 12 MPH ENE RMY N/A 10/6 58/53/56/+1/0.56/000/00 20 NE AERO 20 MPH NE RMY N/A 10/7 75/57/66/+11/0.07/213/31 48 S AERO 55 MPH S RMY 55 10/8 65/50/58/+4/0.00/581/85 25 NW AERO 27 MPH NW RMY 28 10/9 59/49/54/0/0.00/545/80 25 ENE AERO 24 MPH ENE RMY 25 10/10 61/46/54/0/0.00/095/14 18 NE AERO 17 MPH NE RMY 18 10/11 67/50/59/+6/0.00/473/70 20 NE AERO 20 MPH NE RMY N/A 10/12 59/50/55/+2/0.02/007/01 30 ENE AER0 31 MPH ENE RMY 32 10/13 59/46/53/0/0.00/482/72 23 ENE AERO 23 MPH ENE RMY 23 10/14 64/42/53/+1/0.00/580/87 15 SSW AERO 15 MPH SSW RMY 15 10/15 66/50/58/+6/0.00/266/40 16 ESE AERO 16 MPH ESE RMY N/A 10/16 60/49/55/+4/0.00/013/02 23 ESE AERO 24 MPH ESE RMY 23 10/17 70/52/61/+10/0.06/277/42 21 S AERO 23 MPH S RMY N/A 10/18 67/50/59/+8/T/630/96 32 WNW AERO 32 MPH W RMY 31 10/19 65/45/55/+5/0.00/379/58 21 W AERO 22 MPH W RMY N/A 10/20 61/44/53/+3/0.00/644/99 33 W AERO 36 MPH W RMY 34 10/21 67/43/55/+5/0.00/648/100 23 SSW AERO 25 MPH SSW RMY 27 10/22 69/44/57/+8/T/419/65 25 SSW AERO 27 MPH SSW RMY 27 10/23 50/40/45/-4/0.00/103/16 18 WNW AERO 18 MPH WNW RMY N/A 10/24 53/36/45/-4/0.00/640/100 31 W AERO 31 MPH W RMY 34 10/25 49/34/42/-7/0.00/401/63 25 WNW AERO 26 MPH WNW RMY 26 10/26 54/34/44/-4/0.00/521/82 35 SW AERO 36 MPH SSW RMY 39 10/27 55/39/47/-1/0.04/480/76 30 W AERO 30 MPH W RMY 29 10/28 58/35/47/-1/0.00/529/84 31 W AERO 33 MPH W RMY 34 10/29 50/30/40/-7/0.00/614/98 15 N AERO 15 MPH N RMY 15 10/30 51/38/45/-2/0.02/094/15 16 W AERO 15 MPH W RMY N/A 10/31 61/43/52/+5/0.05/000/00 37 SSW AERO N/A N/A RMY N/A 11/1 68/56/62/+16/0.10/.../.. 60 SSW AERO N/A N/A RMY 66 11/2 65/49/57/+11/0.00/.../.. 22 WSW AERO N/A N/A RMY 23 11/3 49/30/40/-6/0.06/.../.. ** 23 N AERO N/A N/A RMY N/A 11/4 42/27/35/-10/0.00/.../.. 24 NNE AERO N/A N/A RMY 25 11/5 50/29/40/-5/0.00/.../.. 16 SSW AERO N/A N/A RMY 17 11/6 morning low temp: 40F; the normal low is now 37F ** trace of snow on 11/3 DAILY RECORDS FOR OCTOBER 2013 None DAILY RECORDS FOR NOVEMBER 2013 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 6 HIGH 71 IN 1959 LOW 22 IN 1951 PRECIP 1.72 INCHES IN 1907 SNOWFALL 8.0 IN 1894 PEAK GUST 63 W IN 1973 RECORDS FOR NOVEMBER 7 HIGH 75 IN 1938 LOW 21 IN 1930 PRECIP 2.02 INCHES IN 1953 SNOWFALL 3.5 IN 2012 PEAK GUST 69e ENE IN 1953 TODAY'S REPORT PREPARED BY: Robert Skilling