BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, OCTOBER 22, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME SUNNY, MILD LATE OCTOBER DAY GUSTY WINDS FROM W-WNW The sun rose into a clear sky right from sunrise and today will be another very sunny day to continue to increase the sunshine minutes total which has been running below normal all month. Temperatures are once again averaging above normal and only 7 days this month have been below normal. Gusty winds are slowly diminishing this afternoon. October continues to be a dry month and will be 2.00 inches below normal after today's dry weather. Today's observations: 7 A.M. Weather: Clear, altocumulus/altocumulus lenticularis distant SSW-NW along horizon Temperature: 48; Dew Point: 42F; Wind: W at 16G23 kts. Sea-level pressure: 29.93 ins. Hg, rising then more rapidly Visibility: 35 miles, WNW 45 miles, hazy all quadrants 6-hour max. temp. 49F 6-hour min. temp: 46F BHO SA 1155 CLR 35 136/48/42/2716G23/993/ AC/ACSL DSNT SSW-NW ALG HRZN VSBY WNW 45 HAZY ALQDS/ 8/040 53007 10049 20046 10 A.M. Weather: Scattered cumulus, cumulus fractus and cumulus forming all quadrants, few cirrus SW, distant haze Temperature: 60F; Dew Point: 41F; Wind: WNW at 19GG30 kts, Wind: Peak wind 30 kts WNW at 9:52 A.M. EST Wind: Direction variable WSW to NW Sea-level pressure: 29.93 ins. Hg, steady Visibility: 50 miles, distant haze BHO SA 1455 45 SCT 50 137/60/41/2919G30/993/ CUFRA/CU FRMG ALQDS FEW CI SW DSNT HZ PK WND 2930/52/ WND 25V32/ 8/100 50001 1 P.M. Weather: Clear, cumulus fractus and cumulus all quadrants, numerous cumulus W-NNW, few cirrus/cirrocumulus S-SSW, distant haze all quadrants Temperature: 64F; Dew Point: 41F; Wind: W at 13G27 kts, Wind: Peak wind 27 kts WNW at 12:45 P.M. EST Wind: Direction variable WSW-NNW Sea-level pressure: 29.91 ins. Hg, falling then more rapidly Visibility: 60 miles, 70 miles NW, distant haze BHO SA 1755 CLR 60 128/64/41/2913G27/991/ CUFRA/CU ALQDS NMRS W-NNW FEW CI/CC S-SSW VSBY NW 70 DSNT HZ ALQDS WND 2927/45/ WND 25V33/ 8/101 58009 10065 20048 WEATHER SUMMARY FOR SUNDAY, OCTOBER 21 TEMPERATURE (DEGREES F) MAX.....63 NORMAL.....59 MIN.....45 NORMAL.....41 MEAN....54 NORMAL.....50 DEPARTURE FROM 30-YEAR NORMAL.....................+4 TOTAL DEPARTURE FOR THE MONTH....................+39 [+1.7 DEGREE/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............11 DEPARTURE........-4 TOTAL HEATING UNITS FOR THE MONTH...........208 DEPARTURE.......-43 TOTAL HEATING UNITS FOR THE SEASON..........307 DEPARTURE.......-86 TOTAL HEATING UNITS LAST SEASON TO DATE.....213 DIFFERENCE......+94 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............36 WNW AT 2:03 P.M. * AERO..................32 WNW AT 2:13 P.M. * ASOS..................35 WNW AT 2:03 P.M. DAVIS.................33 WNW AT 2:02 P.M. RMY 34 THE FASTEST MILE FOR YESTERDAY...........26 WNW AT 3:22 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE............26 WNW AT 3:22 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........24 W AT 3:22 P.M. AVERAGE WIND SPEED AND DIRECTION.......14.4 W ASOS................13.6 DAVIS...............12.6 W [270 deg] *last of several occurrences 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..........1.29 DEPARTURE...........-1.84 ASOS..............1.23 TOTAL PRECIPITATION FOR THE YEAR..........29.91 DEPARTURE..........-12.30 ASOS.............29.78 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/.../.. 25 ESE AERO 23 MPH ESE RMY 25 10/19 66/51/59/+9/..../007/01 39 SSE AERO 38 MPH SSE RMY 39 10/20 73/53/63/+13/..../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 morning low temp: 46F; the normal low is now 41F 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 22 HIGH 85F IN 1979 LOW 22F IN 1940 PRECIP 1.37 INCHES IN 1898 SNOWFALL TRACE IN 1969 PEAK GUST 67 MPH ESE IN 1988 RECORDS FOR OCTOBER 23 HIGH 82F IN 1947 LOW 24F IN 1969 PRECIP 2.18 INCHES IN 1956 SNOWFALL 3.0 INCHES IN 1891 PEAK GUST 78e MPH NW IN 1941 TODAY'S REPORT PREPARED BY: Robert Skilling / Patrick Peters