BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, OCTOBER 11, 2015 ALL TIMES ARE IN EASTERN STANDARD TIME OCTOBER TEMPS. CONTINUE ABOUT 2 DEGREES BELOW NORMAL TEMPERATURES SATURDAY FELL A COUPLE DEGREES ON COOL SIDE MONTHLY PRECIPITATION TOTAL STILL BELOW NORMAL The high temperature of 59F yesterday fell several degrees cooler than normal and the day average degrees below normal. The month is running 2 degrees cooler than normal and 6 out of 10 days have been slightly cooler than normal. Precipitation for the month is still well short of one inch and running close to 3/4 of an inch on the dry side. Today's Observations: 7 A.M. Weather: Thin broken cirrus at 2 levels, few altocumulus and altocumulus lenticularis distant WNW-NNW and distant E Temperature: 49F; Dew Point: 45F; Wind: SW at 13 kts, Sea-level pressure: 30.06 ins. Hg, rising, then more slowly Visibility: 30 miles, except 40 miles NE, light distant fog/haze 6-hr Max temp: 49F 6-hr Min temp: 46F BHO SA 1155 250 -BKN 300 -BKN 30 156/49/45/2213/990/ FEW AC/ACSL DSNT WNW-NNW AND E THN FG/HZ DSNT XCPT NE VSBY NE 40/ 8/041 50002 10049 20046 10 A.M. Weather: Scattered dense cirrus, thin broken cirrus, few small cumulus distant SE-SW, few patches altocumulus and altocumulus lenticularis (distant NW-NNE, dense cirrus NNE-SSE Temperature: 58F; Dew Point 45F; Wind: SW at 15 kts, Sea-level pressure: 29.96 ins. Hg, falling then more rapidly Visibility: 60 miles, 70 miles NW, light distant haze BHO SA 1455 220 SCT 250 –BKN 60 147/58/45/2215/996/ FEW SML CUFRA/CU DSNT SE-SW FEW AC/ACSL DSNT WNW-NNE PTCHS DNS CI NNE-SE VSBY NW 70 LGT DSNT HZ/ 8/142 58009 SUMMARY FOR SATURDAY, OCTOBER 10, 2015 TEMPERATURE (DEGREES F) MAX.....59 NORMAL.....62 MIN.....44 NORMAL.....45 MEAN....52 NORMAL.....54 DEPARTURE FROM 30-YEAR NORMAL........................-2 TOTAL DEPARTURE FOR THE MONTH.......................-18 [-2.0 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0 DEPARTURE...........0 TOTAL COOLING UNITS FOR THE MONTH...............0 DEPARTURE..........-2 TOTAL COOLING UNITS FOR THE SEASON............810 DEPARTURE........+211 TOTAL COOLING UNITS LAST SEASON TO DATE.......587 DIFFERENCE.......+223 HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............12 DEPARTURE...........0 TOTAL HEATING UNITS FOR THE MONTH.............113 DEPARTURE.........+13 TOTAL HEATING UNITS FOR THE SEASON............156 DEPARTURE.........-87 TOTAL HEATING UNITS LAST SEASON TO DATE.......194 DIFFERENCE........-38 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................33 NNW AT 12:52 A.M. ASOS........................37 NNW AT 1:27 A.M. DAVIS.......................33 N AT 12:52 A.M. RMY N/A FASTEST MILE FOR YESTERDAY.................... 23 NNW AT 12:54 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................23 NNW AT 12:53 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................22 N AT 12:43 A.M. . AVERAGE WIND SPEED AND DIRECTION..............10.1 NNW ASOS.......................10.2 DAVIS.......................8.8 NW [320 DEG] 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...........0.79 DEPARTURE.....-0.69 ASOS...............0.78 TOTAL PRECIPITATION FOR THE YEAR...........34.19 DEPARTURE.....-5.63 ASOS................N/A *** *** ASOS annual total not available due to erroneous readings PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY GUST RMY: R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 10/1 55/51/53/-4/..../.../.. 39 NE RMY N/A 10/2 51/47/49/-8/..../.../.. 40 NE RMY 43 10/3 51/45/48/-8/..../000/00 38 NE RMY N/A 10/4 55/49/52/-4/0.00/.../.. 35 E RMY 40 10/5 59/46/53/-3/T/.../.. 21 NE RMY 20 10/6 68/43/56/+1/0.00/.../.. 17 NW RMY 17 10/7 69/46/58/+3/0.00/.../.. 20 W RMY 20 10/8 63/49/56/+2/0.00/.../.. 21 S RMY N/A 10/9 68/50/59/+5/0.27/.../.. 45 S RMY 49 10/10 59/44/53/-2/0.00/.../.. 33 NNW RMY N/A 10/11 low since midnight is 46F; normal low is now 45F DAILY RECORDS FOR OCTOBER 2015 -NONE SO FAR. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 11 HIGH 80F IN 1919,1949 LOW 28F IN 1993 PRECIP 0.96 INCHES IN 1903 SNOWFALL (NONE) PEAK GUST 66e MPH WNW IN 1941 RECORDS FOR OCTOBER 12 HIGH 87F IN 1954 LOW 31F IN 1906 PRECIP 1.53 INCHES IN 1948 SNOWFALL TRACE IN 1941 PEAK GUST 55 MPH NW IN 1963 TODAY'S REPORT PREPARED BY: Robert Skilling