BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, OCTOBER 29, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME HURRICANE SANDY WITH 90 MPH AND CENTRAL PRESSURE OF 940 MBS OR 27.76 INS SE OF NEW JERSEY COAST Winds ramping up here at the summit especially this afternoon with gusts reaching well over 50 MPH and at times reaching near 60 MPH and a bit higher from the ENE and may go higher this afternoon. Today's observations: 7 A.M. Weather: Obscurement with light rain and heavy fog Temperature: 53F; Dew Point: 53F; Wind: ENE at 24G35 kts Wind: Direction variable N-E Sea-level pressure: 29.57 ins. Hg, falling then more slowly Visibility: 1/8 mile, light rain and heavy fog, briefly 1 mile SW 6-hour precip: 0.28 inch 24-hour precip: 0.68 inch 6-hour min. temp: 51F BHO SA 1155 W3 X 1/8R-F 014/53/53/0624G35/957/ STRA DRFTG OVR SMT VSBY OCNL 1 SW R- OCNL R RBLEUKN PK WND 0441/06/ WND 01V11/ 8//// 56020 ASOS 60030 MANUAL 60028 ASOS 70070 MANUAL 70068 10053 20051 10 A.M. Weather: Obscurement with light rain and heavy fog and occasionally moederate rain Temperature: 54F; Dew Point: 54F; Wind: ENE at 27G43 kts, Wind: Peak wind 45 kts ENE at 09:03 A.M. EST Wind: Direction variable N-E Sea-level pressure: 29.47 ins. Hg, falling then more rapidly Visibility: 1/8 mile, light rain and fog 3-hour precip: 0.30 inch BHO SA 1455 W3 X 1/8R-F 979/54/54/0627G43/947/ STRA DRFTG OVR SMT R- OCNL R PK WND 0645/03/ WND 01V09/ 58035 ASOS 60030 MANUAL 60030 1 P.M. Weather: Obscurement with moderate to occasionally heavy rain with dense fog Temperature: 55F; Dew Point: 55F; Wind: ENE at 28G50 kts, Wind: Peak wind 51 kts from ENE at 12:38 P.M. EST Wind: Direction variable N-E Wind: Sea-level pressure: 29.28 ins. Hg, decreasing rapidly Visibility: 1/8 mile, moderate to heavy rain and heavy fog 6-hour precip: 0.60 6-hour max. temp: 56F BHO SA 1755 W3 X 1/8RF 916/55/55/0628G50/928/ STRA DRFTG OVR SMT R OCNL R+ PK WND 0651/38/ WND 01V09/ 8//// 58063 MANUAL 6060/ ASOS 60055 10056 20053 WEATHER SUMMARY FOR SUNDAY, OCTOBER 28 TEMPERATURE (DEGREES F) MAX.....54 NORMAL.....56 MIN.....49 NORMAL.....39 MEAN....52 NORMAL.....48 DEPARTURE FROM 30-YEAR NORMAL.....................+4 TOTAL DEPARTURE FOR THE MONTH....................+82 [+2.7 DEGREE/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............15 DEPARTURE........-2 TOTAL HEATING UNITS FOR THE MONTH...........280 DEPARTURE.......-87 TOTAL HEATING UNITS FOR THE SEASON..........379 DEPARTURE......-130 TOTAL HEATING UNITS LAST SEASON TO DATE.....346 DIFFERENCE......+33 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............45 ENE AT 11:38 P.M. AERO..................46 ENE AT 11:38 P.M. ASOS..................40 ENE AT 11:28 P.M. DAVIS.................N/A RMY n/a THE FASTEST MILE FOR YESTERDAY...........26 NE AT 11:20 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............15 NE AT 11:19 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........N/A AVERAGE WIND SPEED AND DIRECTION.......17.2 ENE ASOS................15.6 DAVIS...............14.6 NE [050 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.68 DEPARTURE..........-0.15 ASOS..............0.71 TOTAL PRECIPITATION FOR THE MONTH..........1.97 DEPARTURE..........-2.25 ASOS..............1.94 TOTAL PRECIPITATION FOR THE YEAR..........30.59 DEPARTURE.........-12.71 ASOS.............30.49 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/.../.. 17 S AERO 16 MPH SW RMY 17 10/26 67/49/58/+10/0.00/.../.. 17 S AERO 16 MPH S RMY 16 10/27 65/50/58/+10/0.00/.../.. 22 NNE AERO 20 MPH NNE RMY 22 10/28 54/49/52/+4/..../000/00 45 ENE AERO 46 MPH ENE RMY N/A 10/29 morning low temp: 51F; the normal low is now 39F 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 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 29 HIGH 74F IN 1989 LOW 23F IN 1891 PRECIP 2.27 INCHES IN 1953 SNOWFALL 4.0 INCHES IN 2011 PEAK GUST 69 S IN 2003 RECORDS FOR OCTOBER 30 HIGH 75F IN 1946,1989 LOW 21F IN 1928 PRECIP 1.85 INCHES IN 1917 SNOWFALL 2.0 INCHES IN 2011 PEAK GUST 66 NW IN 1963 TODAY'S REPORT PREPARED BY: Robert Skilling/Patrick Peters