BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, JUNE 22, 2014 ALL TIMES ARE IN EASTERN STANDARD TIME ANOTHER NICE SUMMER DAY WITH HIGH VISIBILITY It was another cool start this morning at the summit, with our morning low of 54F being five degrees below average. Despite this, it has been another excellent summer day, albeit still a bit on the cool side of average, with the temperature rising to a high of 74F so far today with comfortable dry air in place again. There were numerous high level clouds this morning, but they have mostly moved away, and been replaced with cumulus and altocumulus clouds that have developed during the day. The visibility was a spectacular 85 miles early this morning, close to the highest value that we can observe here of 90 miles. It had dropped a little this afternoon but was still at 75 miles. The wind began the day very light from the NE, turned NW in the late morning as it picked up a little, but then turned back to the NE by early afternoon. This sea breeze is helping to keep our temperature cooler than normal today, as is the considerable amount of cloud cover this afternoon. The blueberry plants on the summit began showing some color last weekend, and the first ripe blueberry was picked on June 19th, which was just two days earlier than the mean date. Today's Observations: 7 A.M. Weather: Broken cirrus, few small cumulus distant SSW, altocumulus distant S-SW, few lower cirrus Temperature: 65F; Dew Point: 45F; Wind: NE at 4 kts, Wind: Light Sea-level pressure: 29.98 ins. Hg, rising then rising more slowly Visibility: 85 miles 6-hr max temp: 65F 6-hr min temp: 54F BHO SA 1155 E250 BKN 85 154/65/45/E0404/998/ FEW SML CU DSNT SSW AC DSNT S-SW FEW LWR CI WND LGT/ 8/131 51007 10065 20054 10 A.M. Weather: Scattered cumulus, few cirrus distant E-SW and NW Temperature: 70F; Dew Point: 48F; Wind: NNW at 5 kts, Wind: Light and variable Sea-level pressure: 29.99 ins. Hg, rising then falling Visibility: 75 miles BHO SA 1455 55 SCT 75 156/70/48/E3305/999/ FEW CI DSNT E-SW AND NW WND LGT AND VRB/ 8/101 50002 1 P.M. Weather: Broken cumulus, broken altocumulus cumulogenitus, clear sky distant offshore NNE-E Temperature: 70F; Dew Point: 50F; Wind: ENE at 2 kts, Wind: Light Sea-level pressure: 29.99 ins. Hg, about steady Visibility: 75 miles 6-hr max temp: 74F 6-hr min temp: 65F BHO SA 1755 75 157/70/50/E0702/999/ CLR SKY DSNT OFFSHR NNE-E WND LGT/ 8/160 55001 10074 20065 WEATHER SUMMARY FOR SATURDAY, JUNE 21, 2014 TEMPERATURE (DEGREES F) MAX.....75 NORMAL.....77 MIN.....52 NORMAL.....59 MEAN....64 NORMAL.....68 DEPARTURE FROM 30-YEAR NORMAL.........................-4 TOTAL DEPARTURE FOR THE MONTH........................+27 [+1.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............1 DEPARTURE...........0 TOTAL HEATING UNITS FOR THE MONTH..............28 DEPARTURE.........-37 TOTAL HEATING UNITS FOR THE SEASON...........6422 DEPARTURE.........+54 TOTAL HEATING UNITS LAST SEASON TO DATE......5781 DIFFERENCE.... ..+641 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............0 DEPARTURE..........-4 TOTAL COOLING UNITS FOR THE MONTH.............51 DEPARTURE..........-8 TOTAL COOLING UNITS FOR THE SEASON............64 DEPARTURE.........-19 TOTAL COOLING UNITS LAST SEASON TO DATE.......76 DIFFERENCE........-12 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................17 NNW AT 6:10 P.M. * ASOS.......................19 NW AT 9:42 A.M. DAVIS......................19 NW AT 9:41 A.M. RMY 19 FASTEST MILE FOR YESTERDAY....................13 NW AT 9:46 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................15 NW AT 9:46 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................13 NW AT 9:45 A.M. AVERAGE WIND SPEED AND DIRECTION..............7.0 NW ASOS.......................7.2 DAVIS......................6.2 NW [318 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..........1.92 DEPARTURE..........-1.35 ASOS..............1.87 TOTAL PRECIPITATION FOR THE YEAR..........24.26 DEPARTURE..........-1.67 ASOS.............24.39 PRELIMINARY CLIMATE SUMMARY FOR JUNE 2014 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 6/1 72/47/60/-2/0.00/887/98 21 NNW RMY 21 6/2 81/52/67/+5//0.00/879/97 22 SSW RMY 23 6/3 81/57/69/+7/0.00/889/98 25 SSE RMY 28 6/4 64/52/58/-5/0.11/000/00 16 SE RMY N/A 6/5 60/55/58/-5/0.91/000/00 21 NNW RMY 24 6/6 73/54/64/+1/0.00/655/72 22 WNW RMY 23 6/7 82/56/69/+5/0.00/893/98 21 W RMY 22 6/8 84/63/74/+10/0.00/702/77 18 SW RMY N/A 6/9 77/61/69/+5/0.13/046/05 21 WSW RMY 22 6/10 80/56/68/+3/0.10/183/20 29 ENE RMY 33 6/11 69/55/62/-3/T/439/48 21 ENE RMY 20 6/12 70/56/63/-2/0.00/101/11 21 ESE RMY N/A 6/13 67/58/63/-2/0.34/000/00 25 E RMY N/A 6/14 73/58/66/0/0.04/238/26 23 WNW RMY 24 6/15 78/53/66/0/0.00/824/90 25 NNW RMY 27 6/16 79/56/68/+2/0.00/834/91 23 S RMY N/A 6/17 81/58/70/+3/0.28/743/81 25 S RMY 24 TSTM 6/18 83/65/74/+7/T/706/77 35 W RMY 38 6/19 81/61/71/+4/0.00/559/61 24 NW RMY 25 6/20 75/55/65/-3/0.00/.../.. 24 NW RMY 27 6/21 75/52/64/-4/0.00/.../.. 17 NNW RMY 19 6/22 morning low temp: 54F; the normal low is now 59F DAILY RECORDS FOR JUNE 2014 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 22 HIGH 93F IN 1921, 2012 LOW 43F IN 1940 PRECIP 1.57 INS IN 1900 PEAK GUST 74 MPH NW IN 1988 RECORDS FOR JUNE 23 HIGH 93F IN 1888 LOW 45F IN 1885 PRECIP 0.70 INS IN 2006 PEAK GUST 63 MPH SE IN 1972 (AGNES) TODAY'S REPORT PREPARED BY: Jonathan O'Brien