BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, OCTOBER 19, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME WARM AND CLOUDY WITH OCCASIONAL LIGHT RAIN SHOWERS; BREEZY WITH ESE WIND GUSTING 25-35 MPH Temperatures are running close to 10 degrees above the 30-year normal today. Dew point temperatures are also on the rise, reaching the lower 60s this afternoon. Dew point temperatures were down in the mid 40s yesterday. Brisk ESE winds have been transporting the warmer, more moist air into the region. Gusts are reaching 30-35 mph from time to time. Clouds have been abundant, but a few fleeting glimpses of sunshine have occurred early this afternoon. Occasional light rain showers have only provided 0.01 inch of rainfall since they began early this morning. Today's observations: 7 A.M. Weather: Scattered cumulus/stratocumulus, broken altocumulus, broken altostratus, overcast cirrostratus, ground fog distant WSW-NW, few altocumulus lenticularis all quadrants, breaks in overcast distant ENE, thin smoke/haze layer distant all quadrants, distant haze, rain shower distant SSW-WSW moving NNE Temperature: 56F; Dew Point: 54F; Wind: ESE at 16G24 kts. Sea-level pressure: 30.02 ins. Hg, falling then rising Visibility: 40 miles, WSW-NW 30 miles above inversion 24-hour precip: 0.01 inch 6-hour precip: 0.01 inch 6-hour min. temp: 52F BHO SA 1155 30 SCT E70 BKN 90 BKN 200 OVC 40 165/56/54/1216G24/002/ GF DSNT WSW-NW FEW ACSL ALQDS BINOVC DSNT ENE THN K/HZ LYR DSNT ALQDS DSNT HZ VSBY WSW-NW 30 ABV INVSN SHRA DSNT SSW-WSW MOVG NNE/ 8/577 55007 MANUAL 70001 MANUAL 60001 10056 20052 10 A.M. Weather: Light rain shower, scattered cumulus, broken altocumulus, broken altostratus, overcast cirrostratus, moderate cumulus SSE-W and distant NNW, altocumulus lenticularis all quadrants, breaks in overcast N and distant NE, sun dimly visible, thin smoke/haze layer distant NNW-E and distant SSW-W, distant haze, rain shower SW and distant WSW-WNW moving NNE, light rain shower began at 9:42 A.M. EST and continued light and intermittent Temperature: 63F; Dew Point: 55F; Wind: ESE at 17G26 kts, Wind: Peak wind of 26 kts. from the ESE at 9:54 A.M. EST Wind: Direction variable E-SSE Sea-level pressure: 29.99 ins. Hg, falling Visibility: 40 miles, distant haze 3-hour precip: Trace BHO SA 1455 35 SCT E80 BKN 100 BKN 200 OVC 40RW- 155/63/55/1217G26/999/ MDT CU SSE-W AND DSNT NNW ACSL ALQDS BINOVC N AND DSNT NE SUN DMLY VSBL THN K/HZ LYR DSNT NNW-E AND DSNT SSW-W DSNT HZ SHRA SW AND DSNT WSW-WNW MOVG NNE PK WND 1226/54 WND 08V15 RW- B42 CTD LGT AND INTMT/ 8/277 58010 MANUAL 6000/ 1 P.M. Weather: Broken stratocumulus (2 levels), broken altocumulus (2 levels), few altocumulus lenticularis distant NNE-NE, sun occasionally visible, distant haze, rain shower distant SSW-NW-NNE moving NNE, light and intermittent rain shower continued from previous hour and became steady at 12:03 P.M. EST, became light and intermittent again at 12:13 P.M. EST and ended at 12:18 P.M. EST, light rain shower began at 12:28 P.M. EST and ended at 12:38 P.M. EST Temperature: 65F; Dew Point: 60F; Wind: ESE at 12G19 kts, Wind: Peak wind of 26 kts. from the ESE at 12:07 P.M. EST Wind: Direction variable ENE-SSE Sea-level pressure: 29.91 ins. Hg, falling Visibility: 35 miles, distant haze 6-hour precip: Trace 6-hour max. temp: 66F BHO SA 1755 E20 BKN 50 BKN 80 BKN 100 BKN 35 127/65/60/1212G19/991/ FEW ACSL DSNT NNE-NE SUN OCNLY VSBL DSNT HZ SHRA DSNT SSW-NW-NNE MOVG NNE PK WND 1226/07 WND 07V15 RW- LGT AND INTMT BCMG STDY 03 BCMG LGT AND INTMT 13 E18 RW-B28E38/ 8/870 58028 MANUAL 6000/ 10066 20056 WEATHER SUMMARY FOR THURSDAY, OCTOBER 18 TEMPERATURE (DEGREES F) MAX.....66 NORMAL.....60 MIN.....46 NORMAL.....42 MEAN....56 NORMAL.....51 DEPARTURE FROM 30-YEAR NORMAL.....................+5 TOTAL DEPARTURE FOR THE MONTH....................+13 [+0.5 DEGREE/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............9 DEPARTURE........-5 TOTAL HEATING UNITS FOR THE MONTH...........189 DEPARTURE.......-17 TOTAL HEATING UNITS FOR THE SEASON..........288 DEPARTURE.......-60 TOTAL HEATING UNITS LAST SEASON TO DATE.....190 DIFFERENCE......+98 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............25 ESE AT 11:37 P.M. AERO..................23 ESE AT 11:37 P.M. ASOS..................24 ESE AT 11:37 P.M. DAVIS.................N/A RMY 25 THE FASTEST MILE FOR YESTERDAY...........18 ESE AT 11:37 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE............18 ESE AT 11:38 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........N/A AVERAGE WIND SPEED AND DIRECTION........9.4 SE ASOS.................8.7 DAVIS................8.5 S [169 deg] * last of several occurrences.. PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01 DEPARTURE...........-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.99 DEPARTURE...........-1.69 ASOS..............0.93 TOTAL PRECIPITATION FOR THE YEAR..........29.61 DEPARTURE..........-12.15 ASOS.............29.48 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 morning low temp: 51F; the normal low is now 42F 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 19 HIGH 81F IN 1945 LOW 21F IN 1922 PRECIP 3.64 INCHES IN 1932 SNOWFALL 1.0 INCHES IN 1972 PEAK GUST 66 MPH SSW IN 1967 RECORDS FOR OCTOBER 20 HIGH 78F IN 1965, 1984 LOW 24F IN 1972 PRECIP 7.10 INCHES IN 1996 (RECORD FOR MONTH) SNOWFALL TRACE IN 1934, 1943 PEAK GUST 63 MPH W IN 1966 TODAY'S REPORT PREPARED BY: Sean Fankhauser