BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, OCTOBER 15, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME MUCH WARMER TEMPERATURES RETURN TODAY ONLY A TENTH OF AN INCH OF RAIN SUNDAY High temperatures have reached the lower 70's early this afternoon after a warm night last night. An overnight low of 57F occurred before midnight rising to 58F by midnight which is currently today's low. The much above normal temperatures have replaced much below normal days of -10 and -12 degrees under the average for last Friday and Saturday. The month is currently averaging very close to normal. Only small daily amounts of precipitation have fallen this month and the latest one was just 0.09 inch yesterday. The month is now 1.15 inches drier than normal with 0.92 inch to date. Today's observations: 7 A.M. Weather: Broken altocumulus, broken dense cirrus, overcast cirrus, few stratus fractus distant E-S altocumulus chaotic sky Temperature: 62F; Dew Point: 60F; Wind: S at 21G30 kts, Wind: Peak wind of 30 kts S @ 06:54 A.M. EST Wind: Direction variable SSE-SSW Sea-level pressure: 29.81 ins. Hg, falling then more slowly Visibility: 12 miles, thin fog 24-hour precip: 0.02 6-hour min. temp: 58F BHO SA 1155 E160 BKN 200 220 BKN 250 OVC 12 096/62/60/1921G30/981/ FEW STFRA DSNT E-S FEW LWR AC AND FEW ACSL AC CHAOTIC DNS CI THN SPTS IOVC THN F ALQDS PK WND 1930/54/ WND 15V21 HVY DEW ALL SFCS/ 8/692 56019 ASOS 70003 MANUAL 70002 10062 20058 10 A.M. Weather: Scattered altocumulus, scattered dense cirrus (2 layers), thin overcast cirrus, few statocumulus Temperature: 70F; Dew Point: 60F; Wind: S at 19G32 kts, Wind: Peak wind SSW @ 35 mph @ 8:58 A.M. EST Wind: Direction variable SSE-SW Sea-level pressure: 29.79 ins. Hg, falling Visibility: 25 miles, hazy BHO SA 1455 160 SCT 200 SCT 220 SCT 250 –OVC 25 087/70/60/2019G32/979/ FEW SC HAZY PK WND 2035/1358/ WND 15V22/ 8/592 58009 1 P.M. Weather: Scattered stratocumulus (layer SE-SW), broken altocumulus, (2 layers) broken dense cirrus, overcast cirrus, layer partly thin and breaks in overcast Temperature: 71F; Dew Point: 60F; Wind: S at 17G27 kts, Wind: Peak wind from S at 31 mph @ 12:08 P.M. Wind: Direction variable SSE-SW Sea-level pressure: 29.72 ins. Hg, falling then falling more rapidly Visibility: 30 miles, except 20 miles S, hazy all quadrants 6-hour max. temp: 73F BHO SA 1755 45 SCT E100 BKN 160 BKN 220 BKN 250 OVC 30 065/71/60/1817G27/972/ CU MSTLY DSNT W-N SC LYR XTDNG SE-SW DNS CI HAZY PK WND 1831/08/ WND 16V22/ 8/832 58022 10073 20062 WEATHER SUMMARY FOR SUNDAY, OCTOBER 14 TEMPERATURE (DEGREES F) MAX.....66 NORMAL.....61 MIN.....43 NORMAL.....43 MEAN....55 NORMAL.....52 DEPARTURE FROM 30-YEAR NORMAL.....................+3 TOTAL DEPARTURE FOR THE MONTH.....................-3 [-0.4 DEGREE/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............10 DEPARTURE........-3 TOTAL HEATING UNITS FOR THE MONTH...........149 DEPARTURE........-2 TOTAL HEATING UNITS FOR THE SEASON..........248 DEPARTURE.......-45 TOTAL HEATING UNITS LAST SEASON TO DATE.....161 DIFFERENCE......+87 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............40 SW AT 1:00 P.M. AERO..................39 SW AT 1:00 P.M. ASOS..................40 SW AT 1:01 P.M. DAVIS.................36 SW AT 1:00 P.M. NMY 39 THE FASTEST MILE FOR YESTERDAY...........27 S AT 11:07 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............26 S AT 11:07 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........26 SW AT 1:02 P.M. AVERAGE WIND SPEED AND DIRECTION.......18.6 SSW ASOS................17.7 DAVIS...............17.1 SSW [200 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.02 DEPARTURE...........-0.13 ASOS..............0.03 TOTAL PRECIPITATION FOR THE MONTH..........0.92 DEPARTURE...........-1.15 ASOS..............0.88 TOTAL PRECIPITATION FOR THE YEAR..........29.54 DEPARTURE..........-11.61 ASOS.............29.43 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/.../.. 32 WNW AERO 30 MPH NW RMY 30 10/13 52/29/41/-12/0.00/.../.. 22 SSW AERO 20 MPH WNW RMY N/A 10/14 66/43/55/+3/0.09/.../.. 40 SW AERO 39 MPH SW RMY 39 10/15 morning low temp: 58F; the normal low is now 43F DAILY RECORDS FOR OCTOBER 2012 10/13: NEW DAILY RECORD LOW MINIMUM TEMPERATURE 29F; breaks previous record of 30 set in 1934, 1936 and 1988 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 15 HIGH 83F IN 1897 LOW 29F IN 1887,1937 PRECIP 4.58 INCHES IN 2005 SNOWFALL TRACE IN 1961,1972 PEAK GUST 69 MPH W IN 2003 RECORDS FOR OCTOBER 16 HIGH 86F IN 1897 LOW 28F IN 1886 PRECIP 2.82 INCHES IN 1974 SNOWFALL TRACE IN 2009 PEAK GUST 68e MPH SSE IN 1954 (HURRICANE HAZEL) TODAY'S REPORT PREPARED BY: Robert Skilling/Patrick Peters