BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, SEPTEMBER 4, 2014 ALL TIMES ARE IN EASTERN STANDARD TIME SEPTEMBER OFF TO A VERY SUMMER-LIKE START DRY WEATHER CONTINUES AND SO DOES THE LONG DRY SPELL CONTINUE ON AND ON..... SINCE AUGUST 13. The first 3 days of September have averaged 10.5 degrees warmer than normal with at least two more warm days to go. Precipitation continues to fall short of normal since our last inch of rainfall on August 13. Only a little over quarter inch of rain (0.27 inch) has been measured since that date, which is about 10 percent of the normal rainfall over the past 21 days. August was up at 70% of possible sunshine while the normal is 58%, and the summer, June, July and August, was the 4th sunniest on record here. AUGUST 2014 PRELIMINARY STATS TEMPERATURE [deg. F] Av. Max. 78.8 Av. Min. 59.7 Mean 69.3 [-1.2] 24-hour corr. mean: 68.6 Max. temp. for month: 89 on 26th and 27th Min. temp. for month: 54 on 19th and 29th Total heating degree day units: 2 [-14] Total cooling degree day units: 142 [-44] Total seasonal cooling units: 479 [-58] Season [1/1 thru 8/31] PRECIPITATION [ins.] Total: 1.55 [-2.48] Greatest one calendar day: 1.09 [13th] Greatest in 24 hours 1.09 [13th] WIND Av. wind speed: 9.4 MPH Av. corr. wind speed: 10.1 MPH Prevailing direction: SSW @ 14% SUNSHINE Total astronomical minutes: 17,910 of a possible 25,751, of 70% Total Campbell Stokes card minutes: 17,238 of a possible 24,780 or 70% The final (sun card) sunshine hours for August ranks as the 6th highest on record. BHO Sunniest Augusts, 1886-2014 1) 303.7 hours, 1971 (74%) 2) 303.0 hours, 1969 (73%) 3) 298.1 hours, 1932 (72%) 4) 296.7 hours, 1970 (72%) 5) 296.6 hours, 1995 (72%) 6) 287.3 hours, 2014 (70%) 7) 286.1 hours, 1941 (69%) The total (sun card) sunshine hours for Summer ranks as the 4th highest on record. BHO Sunniest Summers (Jun-Aug), 1886-2014 1) 920.1 hours, 1971 (71%) 2) 876.0 hours, 1965 (68%) 3) 863.8 hours, 1966 (67%) 4) 862.5 hours, 2014 (66%) 5) 861.7 hours, 1909 (66%) Today's Observations: 7 A.M. Weather: Thin scattered cirrus, WSW-N-E Temperature: 66F; Dew Point: 56F; Wind: WNW at 6 kts, Sea-level pressure: 30.21 ins. Hg, increasing, then more slowly Visibility: 70 miles 6-hr max temp: 66F 6-hr min temp: 61F 24-hr precip: 0.00 BHO SA 1155 250 -SCT 70 229/66/56/2906/021/ CI WSW-N-E LGT DSNT HZ/ 8/001 51022 10066 20061 10 A.M. Weather: Clear, few cirrus except SW-NW, smoke layer along and above horizon WSW-NE dark smoke layer WNW Temperature: 78F; Dew Point: 52F; Wind: SW at 4 kts, Sea-level pressure: 30.20 ins. Hg, falling slightly Visibility: 60 miles, except 25 miles NE, light haze increasing BHO SA 1455 CLR 60 227/78/52/2304/020/ FEW CI XCPT SW-NW K LYR ALG/ABV HRZN WSW-NE DRK K LYR WNW VSBY NE 25 LGT DSNT HZ INCRSG WND LGT/ 8/001 58002 1 P.M. Weather: Clear, few cumulus SSE-NNE Temperature: 84F; Dew Point: 54F; Wind: W at 8 kts, Sea-level pressure: 30.16 ins. Hg, falling, then more slowly Visibility: 65 miles, light distant haze 6-hr max. temp: 85F 6-hr min. temp: 66F BHO SA 1755 CLR 65 213/84/54/2608/016/ FEW CU SSE-NNE LGT DSNT HZ ALQDS/ 8/100 56014 10085 20066 WEATHER SUMMARY FOR WEDNESDAY, SEPTEMBER 3, 2014 TEMPERATURE (DEGREES F) MAX.....83 NORMAL.....76 MIN.....67 NORMAL.....59 MEAN....75 NORMAL.....67 DEPARTURE FROM 30-YEAR NORMAL.........................+8 TOTAL DEPARTURE FOR THE MONTH........................+32 [+10.5 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY.............10 DEPARTURE...........+6 TOTAL COOLING UNITS FOR THE MONTH.............40 DEPARTURE..........+29 TOTAL COOLING UNITS FOR THE SEASON...........519 DEPARTURE..........-29 TOTAL COOLING UNITS LAST SEASON TO DATE......660 DIFFERENCE........-141 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................24 NW AT 8:57 A.M. ASOS.......................27 NW AT 8:58 A.M. DAVIS......................25 NW AT 2:10 A.M. RMY 27 FASTEST MILE FOR YESTERDAY....................20 NW AT 9:10 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................20 NW AT 9:12 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................18 WNW AT 9:12 A.M. AVERAGE WIND SPEED AND DIRECTION..............12.0 WNW ASOS.......................11.7 DAVIS......................10.6 W [280 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE..........-0.12 ASOS..............0.00 TOTAL PRECIPITATION FOR SEPTEMBER..........0.00 DEPARTURE..........-0.34 ASOS..............0.00 TOTAL PRECIPITATION FOR THE YEAR..........31.18 DEPARTURE..........-4.18 ASOS.............31.43 PRELIMINARY CLIMATE SUMMARY FOR AUGUST & SEPTEMBER 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 8/1 86/63/75/+3/0.00/598/69 25 S RMY 29 8/2 68/59/64/-8/0.11/009/01 21 ESE RMY 22 8/3 71/60/66/-6/0.01/104/12 12 SE RMY 12 8/4 83/64/74/+2/0.00/550/64 20 S RMY 21 8/5 87/66/77/+5/0.00/798/93 17 S RMY 19 8/6 79/64/72/0/0.07/462/54 23 WNW RMY 25 8/7 79/58/69/-3/T/589/69 22 NW RMY 24 TSTM 8/8 82/55/69/-3/0.00/817/96 20 WNW RMY 20 8/9 82/60/71/-1/0.00/730/86 16 WNW RMY 17 8/10 84/63/74/+3/0.00/770/91 15 W RMY N/A 8/11 85/63/74/+3/0.00/667/79 25 S RMY 29 8/12 81/64/73/+2/0.00/387/46 25 SSE RMY N/A 8/13 69/61/65/-6/1.09/000/00 35 ESE RMY 37 8/14 73/57/65/-6/0.00/828/99 27 W RMY 29 8/15 74/56/65/-6/0.09/459/55 23 W RMY 23 TSTM 8/16 76/56/66/-5/0.00/640/77 24 SW RMY 27 8/17 78/60/69/-2/0.01/555/67 21 WNW RMY 23 8/18 77/56/67/-4/0.00/776/94 23 WNW RMY 25 8/19 78/54/66/-4/0.00/816/99 17 WNW RMY 17 8/20 78/58/68/-2/0.00/813/99 15 NE RMY 15 8/21 76/58/67/-3/T/434/53 16 ENE RMY 17 8/22 71/60/66/-4/0.07/057/07 17 NE RMY 19 8/23 71/58/65/-5/0.00/618/76 22 ENE RMY 25 8/24 78/58/68/-2/0.00/811/100 16 ENE RMY N/A 8/25 85/63/74/+5/0.00/808/100 16 NW RMY 17 8/26 89/62/70/+7/0.00/781/97 20 SSW RMY 23 8/27 89/64/77/+8/0.03/731/91 23 SW RMY 25 8/28 80/59/70/+1/0.00/640/80 25 NW RMY 28 8/29 73/54/64/-5/0.00/789/99 18 E RMY 21 8/30 77/55/66/-2/0.00/723/91 23 S RMY 28 8/31 83/63/73/+5/0.07/150/19 26 SSW RMY 31 9/1 88/69/79/+11/0.00/.../.. 16 W RMY 19 9/2 91/70/81/+13/0.00/.../.. 24 S RMY 27 TSTM 9/3 83/67/75/+8/0.00/.../.. 24 NW RMY 27 9/4 morning low temp: 61F; normal low now 59F DAILY RECORDS FOR AUGUST 2014: None so far. DAILY RECORDS FOR SEPTEMBER 2014: None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR SEPTEMBER 4 HIGH 90F IN 1953, 1973 LOW 46F IN 1987 PRECIP 3.22 INCHES IN 1922 PEAK GUST 47 MPH SE IN 1966 RECORDS FOR SEPTEMBER 5 HIGH 90F IN 1971 LOW 45F IN 1906 PRECIP 1.37 INCHES IN 1907 PEAK GUST 46 MPH NW IN 1994 TODAY'S REPORT PREPARED BY: Robert Skilling/Brian Fitzgerald