BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, OCTOBER 25, 2015 ALL TIMES ARE IN EASTERN STANDARD TIME SHORT PERIOD OF LIGHT RAIN THIS MORNING VERY COOL DAY YESTERDAY WITH MAXIMUM ONLY 46F A couple of hours with some light rain this morning left just 0.04 inch during this very dry month to date. Saturday was a cold day for late October averaging 9 degrees below normal. The maximum of 46F was 12 degrees below the average to be expected for the date of 58F. The minimum of 33F was 7 degrees below the average. Today's Observations: 7 A.M. Weather: Overcast nimbostratus, few stratocumulus, light rain, thin fog, rain began at 6:10 A.M. Temperature: 50F; Dew Point: 48F; Wind: S at 17 kts, Sea-level pressure: 30.04 ins. Hg, falling then more rapidly Visibility: 15 miles, except SW-N 10 miles, E-S 20 miles, visibility lowering, light rain and thin fog 6-hr Max temp: 50F 6-hr Min temp: 46F 24-hr precip: 0.01 in. BHO SA 1155 E95 OVC 15R- 174/50/48/1817/004/ FEW LWR SC VSBY SW-N 10 E-S 20 LWRG ALQDS RB10/ 8/52/ 58024 MANUAL 6001/ ASOS 60001 MANUAL 70001 ASOS 70001 10050 20046 10 A.M. Weather: Scattered stratus fractus, broken stratocumulus, overcast nimbostratus Temperature: 55F; Dew Point 54F; Wind: SSW @ 17 kts Sea-level pressure: 30.05 ins. Hg, about steady Visibility: 15 miles, except 10 miles SE-SW, thin fog 3-hr precip: 0.03 inch BHO SA 1455 7 SCT E25 35 OVC 15 176/55/54/2017/005/ VSBY SE-SW 10 THN FG/ 8/72/ 50002 MANUAL 6003/ ASOS 60003 1 P.M. Weather: Broken stratus fractus, overcast alt0stratus Temperature: 56F; Dew Point 54F; Wind: WSW @ 11 kts Sea-level pressure: 30.00 ins. Hg, falling then more rapidly Visibility: 25 miles light distant fog 6-hr max temp: 56F 6-hr min temp: 50F 6-hr precip: 0.03 in. BHO SA 1755 E18 BKN 60 OVC 25 162/56/54/2411/001/ CIG RGD THN DSNT FG/ 8/62/ 58014 MANUAL 6003/ ASOS 60003 10056 20050 SUMMARY FOR SATURDAY, OCTOBER 24, 2015 TEMPERATURE (DEGREES F) MAX.....46 NORMAL.....58 MIN.....33 NORMAL.....40 MEAN....40 NORMAL.....49 DEPARTURE FROM 30-YEAR NORMAL.......................-9 TOTAL DEPARTURE FOR THE MONTH......................-15 [-0.8 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..........-5 TOTAL COOLING UNITS FOR THE SEASON............810 DEPARTURE........+208 TOTAL COOLING UNITS LAST SEASON TO DATE.......595 DIFFERENCE.......+215 HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............25 DEPARTURE..........+9 TOTAL HEATING UNITS FOR THE MONTH.............308 DEPARTURE..........+9 TOTAL HEATING UNITS FOR THE SEASON............351 DEPARTURE.........-90 TOTAL HEATING UNITS LAST SEASON TO DATE.......337 DIFFERENCE........+14 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................15 SSE AT 11:53 P.M. ASOS........................15 SSE AT 11:53 P.M. . DAVIS.......................14 N AT 12:57 A.M. RMY N/A FASTEST MILE FOR YESTERDAY.....................13 SSE AT 11:48 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................13 SSE AT 11:56 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................12 NNE AT 5:56 A.M. AVERAGE WIND SPEED AND DIRECTION...............6.7 N ASOS....................... 7.0 DAVIS...................... 5.9 NNE [025 Deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.01 DEPARTURE.....-0.14 ASOS...............0.01 TOTAL PRECIPITATION FOR THE MONTH...........1.08 DEPARTURE.....-2.52 ASOS...............1.06 TOTAL PRECIPITATION FOR THE YEAR...........35.22 DEPARTURE.....-7.46 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/..../000/00 39 NE RMY N/A 10/2 51/47/49/-8/..../000/00 40 NE RMY 43 10/3 51/45/48/-8/..../000/00 38 NE RMY N/A 10/4 55/49/52/-4/0.00/474/68 35 E RMY 40 10/5 59/46/53/-3/T/125/18 21 NE RMY 20 10/6 68/43/56/+1/0.00/663/96 17 NW RMY 17 10/7 69/46/58/+3/0.00/640/93 20 W RMY 20 10/8 63/49/56/+2/0.00/678/99 21 S RMY N/A 10/9 68/50/59/+5/0.27/130/19 45 S RMY 49 10/10 59/44/53/-2/0.00/673/99 33 NNW RMY N/A 10/11 67/46/57/+4/0.00/582/86 26 SW RMY 28 10/12 76/50/63/+10/0.00/647/96 22 SSW RMY 24 10/13 70/55/63/+10/0.27/208/31 23 S RMY 24 10/14 66/46/56/+4/0.00/428/64 26 W RMY 29 10/15 60/41/51/-1/0.00/659/99 20 SW RMY 27 10/16 60/44/52/+1/T/471/71 31 W RMY 34 10/17 54/35/45/-6/T/482/73 30 WNW RMY 33 10/18 45/28/37/-14/0.00/480/73 24 NNW RMY 25 10/19 47/26/37/-13/0.00/648/99 25 SSW RMY 30 10/20 65/43/54/+4/0.00/.../.. 28 SW RMY 28 10/21 59/51/55/+5/0.01/.../.. 18 SSE RMY 21 10/22 71/51/61/+12/T/.../.. 31 W RMY 34 10/23 55/34/45/-4/0.00/.../.. 31 NNW RMY 34 10/24 46/33/40/-9/0.00/.../.. 15 SSE RMY N/A 10/25 low since midnight is 45F; normal low is now 40F 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 25 HIGH 81F IN 1963 LOW 26F IN 1922,1939 PRECIP 2.45 INCHES IN 2005 SNOWFALL 1.2 INCHES IN 1960 PEAK GUST 72 MPH ESE IN 1980 RECORDS FOR OCTOBER 26 HIGH 80F IN 1963 LOW 24F IN 1933 PRECIP 1.72 INCHES IN 1894 SNOW 3.0 INCHES IN 1962 WIND 59 MPH SSE IN 1967 TODAY'S REPORT PREPARED BY: Robert Skilling