BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, OCTOBER 1, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME 3-DAY RAINFALL TOTAL SEPT. 28-30 ALMOST ONE INCH Sunshine returned today after a gloomy weekend and a 3-day rainfall total of 0.99 inch. Monthly stats for September will be out tomorrow. Today's observations: 7 A.M. Weather: Scattered altocumulus, (2 levels), scattered dense cirrus, few stratocumulus with cumuloform tops distant SSE-SSW, few altocumulus lenticularis SW-NW, dense cirrus distant NW-NNE, thin smoke layer along horizon SSW-SW, heavy dew most surfaces Temperature: 49F; Dew Point: 47F; Wind: SW at 14 kts. Sea-level pressure: 29.75 ins. Hg, rising Visibility: 30 miles 6-hour precip: 0.00 inch 24-hour precip: 0.22 inch 6-hour min. temp: 47F BHO SA 1155 70 SCT 110 SCT 220 SCT 30 073/49/47/2314/975/ FEW SC CUFRM TOPS DSNT SSE-SSW AC LYRS FEW ACSL SW-NW DNS CI DSNT NW-NNE THN K LYR ALG HRZN SSW-SW HVY DEW MOST SFCS/ 8/572 51005 ASOS 70021 MANUAL 70022 10049 20047 10 A.M. Weather: Broken stratocumulus, few cumulus fractus and cumulus forming ESE-SW, distant haze Temperature: 61F; Dew Point: 50F; Wind: WSW at 14G23 kts, Wind: Peak wind 27 kts from WSW at 9:42 a.m. Wind: Direction variable SSW-WNW Sea-level pressure: 29.76 ins. Hg, rising slightly Visibility: 45 miles, distant haze BHO SA 1455 E35 BKN 45 079/61/50/2514G23/976/ FEW CUFRA FRMG ESE-SSW DSNT HZ PK WND 2527/42/ WND 21V29/ 8/800 51006 1 P.M. Weather: Broken stratocumulus Temperature: 63F; Dew Point: 50F; Wind: W at 14G22 kts, Wind: Peak wind from WSW at 30 kts at 12:37 p.m. Wind: Direction variable SSW-WNW Sea-level pressure: 29.77 ins. Hg, falling Visibility: 55 miles, 70 miles, distant haze 6-hour max. temp: 64F BHO SA 1755 E35 BKN 55 082/63/50/2614G22/977/ VSBY NW 70 DSNT HZ PK WND 2530/37/ WND 21V29/ 8/500 53003 10064 20049 WEATHER SUMMARY FOR SUNDAY, SEPTEMBER 30 TEMPERATURE (DEGREES F) MAX.....57 NORMAL.....66 MIN.....50 NORMAL.....49 MEAN....54 NORMAL.....58 DEPARTURE FROM 30-YEAR NORMAL.....................-4 TOTAL DEPARTURE FOR THE MONTH.....................+9 [+0.1 DEGREE] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............11 DEPARTURE........+3 TOTAL HEATING UNITS FOR THE MONTH............99 DEPARTURE.......-18 TOTAL HEATING UNITS FOR THE SEASON...........99 DEPARTURE.......-43 TOTAL HEATING UNITS LAST SEASON TO DATE......75 DIFFERENCE......+24 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............23 SSW AT 7:11 P.M. * AERO..................23 SSW AT 6:42 P.M ASOS..................23 SW AT 11:32 P.M. DAVIS.................21 S AT 6:35 P.M. RMY N/A THE FASTEST MILE FOR YESTERDAY...........16 SW AT 11:44 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............17 SSW AT 8:03 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........17 SSW AT 8:03 P.M. AVERAGE WIND SPEED AND DIRECTION........7.3 SSW ASOS.................7.0 DAVIS................6.7 WSW [250 deg] * Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.22 DEPARTURE...........+0.08 ASOS..............0.21 TOTAL PRECIPITATION FOR THE MONTH..........3.27 DEPARTURE...........-0.79 ASOS..............3.29 TOTAL PRECIPITATION FOR THE YEAR..........28.62 DEPARTURE..........-10.46 ASOS.............28.55 PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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 9/1 75/60/68/0/0.00/637/81 27 ENE AERO 25 MPH ENE RMY 23 9/2 80/60/70/+2/0.00/455/58 21 ENE AERO 20 MPH ENE RMY 20 9/3 76/57/67/0/0.00/485/62 20 SE AERO 20 MPH S RMY 21 9/4 72/62/67/0/0.40/000/00 25 S AERO 23 MPH S RMY N/A 9/5 79/64/72/+5/0.31/171/22 33 SSW AERO 35 MPH SSW RMY 33 9/6 77/62/70/+3/0.00/279/36 20 SSW AERO 20 MPH SSW RMY 19 9/7 85/66/76/+10/0.00/463/60 22 SSW AERO 20 MPH SSW RMY N/A TSTM 9/8 81/62/72/+6/0.38/453/59 45 S AERO 45 MPH S RMY 45 9/9 72/58/65/-1/0.02/283/37 25 WNW AERO 23 MPH WNW RMY N/A 9/10 66/50/58/-7/0.00/313/41 33 NW AERO 32 MPH NW RMY 34 9/11 71/47/59/-6/0.00/714/94 23 NW AERO 21 MPH WNW RMY N/A 9/12 77/53/65/0/0.00/719/95 20 S AERO 18 MPH S RMY 18 9/13 81/59/70/+6/0.00/731/97 21 S AERO 18 MPH S RMY 19 9/14 81/59/70/+6/0.00/706/94 25 S AERO 23 MPH S RMY 23 9/15 72/54/63/-1/0.07/441/59 28 NW AERO 27 MPH WNW RMY 27 9/16 70/49/60/-3/0.00/731/98 23 W AERO 20 MPH W RMY 21 9/17 74/51/63/0/0.00/698/94 20 S AERO 17 MPH S RMY N/A 9/18 74/58/66/+4/0.13/044/06 60 S AERO 62 MPH S RMY 63 9/19 70/53/62/0/0.90/472/64 55 S AERO 56 MPH S RMY N/A 9/20 63/50/57/-5/0.00/539/87 24 NE AERO 21 MPH NE RMY 21 9/21 63/48/56/-5/0.01/241/33 18 E AERO 16 MPH E RMY 16 9/22 70/55/63/+2/0.04/306/42 28 S AERO 25 MPH S RMY 27 9/23 69/50/60/0/0.02/653/90 27 WNW AERO 24 MPH WNW RMY 27 9/24 66/45/56/-4/0.00/694/96 23 WSW AERO 21 MPH WSW RMY 22 9/25 72/48/60/0/0.00/691/96 35 SSW AERP 35 MPH SW RMY 36 9/26 70/57/64/+5/T/050/07 31 S AERO 32 MPH S RMY 32 9/27 70/53/62/+3/0.00/557/78 24 NNW AERO 23 MPH NNW RMY 23 9/28 56/53/55/-3/..../000/00 29 ESE AERO 29 MPH ESE RMY 30 9/29 56/51/54/-4/..../000/00 28 NNE AERO 25 MPH NNE RMY N/A 9/30 57/50/54/-4/..../054/08 23 SSW AERO 23 MPH SSW RMY N/A 10/1 morning low temp: 47F; the normal low is now 49F DAILY RECORDS FOR SEPTEMBER 2012 9/19 - NEW RECORD PEAK WIND GUST OF 55 MPH S; surpasses previous record of 49 MPH NE IN 1972 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 1 HIGH 85F IN 1927 LOW 30F IN 1992 PRECIP 1.44 INCHES IN 1984 PEAK GUST 68e MPH SSE IN 1977 RECORDS FOR OCTOBER 2 HIGH 85F IN 1968 LOW 29F IN 1899 PRECIP 1.75 INCHES IN 1984 PEAK GUST 52e MPH S IN 1952, 52 NNW IN 1984 TODAY'S REPORT PREPARED BY: Robert Skilling/Patrick Peters