BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, AUGUST 13, 2015 ALL TIMES ARE IN EASTERN STANDARD TIME DRY AND SEASONABLE TEMPERATURES TAKE HOLD IN SOUTHERN NEW ENGLAND Yesterday's maximum temperature of 83F, reached around 2:30 PM EST, was just three degrees above the daily normal maximum of 80F. Clear and normal temperatures in the lower 60s allowed for comfortable viewing of this morning's perseid meteor showers. This morning's minimum was 62F. Excellent visibility has been reported this morning at 80 miles in all directions without any visible haze or particulate matter. By the 1:00 PM EST observation cumulus were scattered with scattered cirrus in the distance offshore. A maximum temperature 80F was recorded with visibility of 80 miles still present. Today's Observations: 7 A.M. Weather: Clear, few cumulus distant NW, few cirrus distant ENE-SSE Temperature: 67F; Dew Point: 59F; Wind: NW at 7 kts Sea-level pressure: 29.99 ins. Hg, rising, then more slowly Visibility: 80 miles 6-hr Max temp: 67F 6-hr Min temp: 62F 24-hr precip: none BHO SA 1155 CLR 80 157/67/59/3207/999/ FEW CU DSNT NW FEW CI DSNT ENE-SSE/ 8/101 51015 10067 20062 10 A.M. Weather: Clear, few small cumulus in all directions, few cirrus distant ENE-SSE and NW Temperature: 75F; Dew Point 58F; Wind: estimated WSW at 6 kts, Wind Speed: Light Sea-level pressure: 30.02 ins. Hg, rising, then steady Visibility: 75 miles BHO SA 1455 CLR 75 166/75/58/E2406/002/ FEW SML CU ALQDS FEW CI DSNT ENE-SSE AND NW WND LGT/ 8/101 51009 1 P.M. Weather: Scattered cumulus, scattered cirrus Temperature: 80F; Dew Point: 57F; Wind: estimated NNW at 5 kts, Wind Speed and Direction: Light and Variable Sea-level pressure: 30.01 ins. Hg, steady, then falling Visibility: 80 miles 6-hr Max temp: 80F 6-hr Min temp: 67F BHO SA 1755 50 SCT 200 SCT 80 162/80/57/E3305/001/ WND LGT AND VRB/ 8/101 58004 10080 20067 SUMMARY FOR WEDNESDAY, AUGUST 12, 2015 TEMPERATURE (DEGREES F) MAX.....83 NORMAL.....80 MIN.....65 NORMAL.....62 MEAN....74 NORMAL.....71 DEPARTURE FROM 30-YEAR NORMAL........................+3 TOTAL DEPARTURE FOR THE MONTH........................+6 [+0.3 DEGREES/DAY] COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............9 DEPARTURE..........+2 TOTAL COOLING UNITS FOR THE MONTH..............87 DEPARTURE..........+3 TOTAL COOLING UNITS FOR THE SEASON............481 DEPARTURE.........+46 TOTAL COOLING UNITS LAST SEASON TO DATE.......416 DIFFERENCE........+65 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................22 W AT 3:38 P.M. ASOS........................23 W AT 3:38 P.M. DAVIS.......................19 W AT 5:13 P.M. RMY 20 FASTEST MILE FOR YESTERDAY.....................16 W AT 3:36 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................17 W AT 3:39 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................15 W AT 3:38 P.M. AVERAGE WIND SPEED AND DIRECTION..............9.0 W ASOS.......................9.2 DAVIS......................8.1 WNW [286 deg.] * Last of several occurrences... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00 DEPARTURE.....-0.13 ASOS...............0.00 TOTAL PRECIPITATION FOR THE MONTH...........0.89 DEPARTURE.....-0.83 ASOS..............0.91 TOTAL PRECIPITATION FOR THE YEAR...........28.25 DEPARTURE.....-4.46 ASOS...............N/A *** *** ASOS annual total not available due to erroneous readings PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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 88/68/78/+6/0.06/729/84 28 WNW RMY N/A 8/2 86/62/74/+2/0.00/865/100 24 SW RMY N/A 8/3 89/68/79/+7/0.00/690/80 31 S RMY N/A 8/4 86/66/76/+4/0.31/422/49 45 W RMY 50 TSTM 8/5 84/64/74/+2/0.00/765/89 28 WNW RMY 27 8/6 80/59/70/-2/0.00/685/80 22 W RMY 21 8/7 78/61/70/-2/0.00/845/99 20 ESE RMY 18 8/8 77/58/68/-4/0.00/741/87 18 E RMY N/A 8/9 72/59/66/-6/T/458/54 27 NNE RMY 26 8/10 84/58/71/0/0.00/.../.. 28 S RMY N/A 8/11 70/63/67/-4/0.52/000/00 32 SSE RMY 35 8/12 83/65/74/+3/0.00/.../.. 22 W RMY 20 8/13 low since midnight is 62F; normal low is now 62F DAILY RECORDS FOR AUGUST 2015 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR AUGUST 13 HIGH 98F IN 1944, 2002 LOW 47F IN 1902, 1957 PRECIP 2.92 INCHES IN 1989 PEAK GUST 52 MPH SSE IN 1963 RECORDS FOR AUGUST 14 HIGH 99F IN 2002 LOW 46F IN 1964 PRECIP 3.06 INCHES IN 1919 PEAK GUST 61 MPH WNW IN 1963 TODAY'S REPORT PREPARED BY: Brian Fitzgerald