BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, OCTOBER 10, 2011 COLUMBUS DAY ALL TIMES ARE IN EASTERN STANDARD TIME NEW RECORD HIGH MAXIMUM TEMPERATURE AND RECORD HIGH MINIMUM RECORDED YESTERDAY AT 82 AND 61F A new record high temperature of 82F was set yesterday at the summit as well as a new record high minimum temperature of 61 degrees breaking the old record of 60F in 1970. CURRENT RECORD HIGH TEMPERATURE 10/10 85F 1949 Today's observations: 7 A.M. Weather: Clear, few cirrus SE-SW, and distant S-SSW and distant NNW Temperature: 61F, Dew point: 53F; Wind: WNW at 10 kts Sea-level pressure: 30.20 inches Hg, steady Visibility: 25 miles, WNW 30 miles above inversion, very thin fog below inversion and summit, lone patch dense ground fog dissipated W 6-hour min: 59F BHO SA 1155 CLR 25 227/61/53/2910/020/ FEW CI VCTY STN SE AND SW FEW CI DSNT S-SSW AND DSNT NNW VRY THN PTCHY F BLO SMT/INVSN SE-SW-NW LONE SHLW DNS PTCH GF DSSPTD W VSBY 30 ABV INVSN WNW HAZY ALQDS/ 8/001 52001 10062 10059 10 A.M. Weather: Clear, few cirrus distant SSW Temperature: 74F, Dew Point: 57F; Wind: WNW at 10 kts Sea-level pressure: 30.19 inches Hg, falling Visibility: 30 miles, hazy BHO SA 1455 CLR 30 224/74/57/2910/019/ FEW CI DSNT SSW ALG HRZN HAZY/ 8/001 58003 1 P.M. Weather: Clear, few cirrus distant SE-SW Temperature: 80F, Dew Point: 58F; Wind: W at 7 kts, Wind: Direction variable SSW-NW Sea-level pressure: 30.14 inches Hg, falling Visibility: 30 miles, hazy 6-hour max. temp: 81F BHO SA 1755 CLR 30 206/80/58/2507/2607/014/ FEW CI DSNT SE-SW HAZY WND 21V31/ 58018 10081 20061 WEATHER SUMMARY FOR SUNDAY, OCTOBER 9 TEMPERATURE (DEGREES F) MAX.....82 NORMAL.....62 MIN.....61 NORMAL.....45 MEAN....72 NORMAL.....54 DEPARTURE FROM 30-YEAR NORMAL.....................+18 TOTAL DEPARTURE FOR THE MONTH.....................+32 [+3.4 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............0 DEPARTURE.......-11 TOTAL HEATING UNITS FOR THE MONTH............62 DEPARTURE.......-28 TOTAL HEATING UNITS FOR THE SEASON..........137 DEPARTURE......-122 TOTAL HEATING UNITS LAST SEASON TO DATE.....169 DIFFERENCE......-32 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............21 W AT 4:59 A.M. AERO...................23 W AT 4:59 A.M. ASOS...................22 W AT 7:43 P.M. DAVIS..................N/A RMY: 24 THE FASTEST MILE FOR YESTERDAY............18 W AT 7:43 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.............18 W AT 7:43 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE............17 W AT 4:59 A.M. AVERAGE WIND SPEED AND DIRECTION........13.0 W ASOS.................12.2 DAVIS................11.6 W [270 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE..........-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.82 DEPARTURE..........+1.56 ASOS..............2.76 TOTAL PRECIPITATION FOR THE YEAR..........46.88 DEPARTURE..........+8.02 ASOS..............47.22** **ASOS data is in error due to system failure on 1/12-13 PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2011 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant 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 70/55/63/+6/.../085/12 24 NE AERO N/A RMY 25 MPH TSTM 10/2 64/54/59/+3/.../000/00 24 NNE AERO 27 MPH NNE RMY 26 MPH 10/3 67/53/60/+4/.../329/47 20 S AERO 22 MPH S RMY 22 MPH 10/4 65/52/59/+3/.../307/44 24 NW AERO 25 MPH NNW RMY 25 MPH 10/5 63/42/53/-2/T/.../468/70 43 WNW AERO 42 MPH WNW RMY 44 MPH 10/6 60/40/50/-5/0.00/354/.. 31 NW AERO 35 MPH WNW RMY 36 MPH 10/7 61/39/50/-5/0.00/.../.. 17 SW AERO 18 MPH SW RMY N/A 10/8 78/49/64/+10/0.00/.../.. 22 WSW AERO 23 MPH WSW RMY 24 MPH 10/9 82/61/72/+18/0.00/.../.. 21 W AERO 23 MPH W RMY 24 MPH 10/10 our morning low temp: 59F; the normal low is 45F DAILY RECORDS FOR OCTOBER 2011 10/9 - NEW DAILY RECORD MAXIMUM TEMP OF 82F; surpasses the previous record of 81F set in 1909. 10/9 - NEW DAILY RECORD HIGH MINIMUM TEMP OF 61F; surpasses the previous record of 60F set in 1970. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 10 HIGH 85F IN 1949 LOW 27F IN 1929 PRECIP 2.02 INCHES IN 1998 SNOWFALL 6.8 INCHES IN 1979 (RECORD FOR MONTH) PEAK GUST 59 MPH WNW IN 1958 RECORDS FOR OCTOBER 11 HIGH 80F IN 1919,1949 LOW 28F IN 1993 PRECIP 0.96 INCHES IN 1903 SNOWFALL (NONE) PEAK GUST 66e MPH WNW IN 1941 TODAY'S REPORT PREPARED BY: Robert Skilling