BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JUNE 9, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME SEVERAL RAIN SHOWERS BRING ONLY 0.03 INCH OF RAIN FRIDAY AFTERNOON THROUGH VERY EARLY SATURDAY...THUNDER ALSO OBSERVED ON FRIDAY...PARTLY SUNNY AND WARM TODAY... A total of 0.03 inch fell in three showers between 5 PM EDT Friday and 1:40 AM EDT Saturday. Thunder was first observed around 4 PM EDT prior to the first shower. Another area of showers today has remained far to the west, though several layers of middle to high clouds have been visible today providing partial sunshine. Today's observations: 7 A.M. Weather: Scattered dense cirrus, thin broken cirrus, few altocumulus S-WNW, cirrocumulus overhead-SW-W Temperature: 63F, Dew Point: 54F; Wind: NW at 7 kts Sea-level pressure: 29.89 inches Hg, rising then steady Visibility: 75 mile 24-hour precip: 0.03 inch 6-hour min. temp: 56F BHO SA 1155 200 SCT 250 –BKN 75 121/63/54/3207/989/ FEW AC S-WNW CC OVHD-SW-W/ 8/001 51017 70003 10063 20056 10 A.M. Weather: Scattered altocumulus, scattered dense cirrus, thin broken cirrus, few small cumulus distant NW-NNE, few altocumulus lenticularis NW-N, few cirrocumulus overhead Temperature: 71F, Dew Point: 47F; Wind: NW at 10 kts, Wind: Direction variable W-N Sea-level pressure: 29.87 inches Hg, falling Visibility: 75 miles BHO SA 1455 180 SCT 200 SCT 250 –BKN 75 114/71/47/3210/987/ FEW SML CU DSNT NW-NNE FEW ACSL NW-N FEW CC OVHD WND 28V36/ 8/139 51007 1 P.M. Weather: Scattered altocumulus, scattered dense cirrus, thin broken cirrus, few cumulus, distant NW-NE and SE, few lower altocumulus Temperature: 75F, Dew Point: 47F; Wind: W at 12 kts, Sea-level pressure: 29.84 inches Hg, falling Visibility: 75 miles 6-hour max. temp: 76F BHO SA 1755 120 SCT 200 SCT 250 –BKN 75 105/75/47/2612/984/ FEW CU DSNT NW-NE AND SE FEW LWR AC/ 8/177 58009 10076 20063 WEATHER SUMMARY FOR FRIDAY, JUNE 8 TEMPERATURE (DEGREES F) MAX.....76 NORMAL.....73 MIN.....51 NORMAL.....55 MEAN....64 NORMAL.....64 DEPARTURE FROM 30-YEAR NORMAL........................0 TOTAL DEPARTURE FOR THE MONTH......................-49 [-6.3 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY...............1 DEPARTURE..........-2 TOTAL HEATING UNITS FOR THE MONTH..............66 DEPARTURE.........+33 TOTAL HEATING UNITS FOR THE SEASON...........4954 DEPARTURE.......-1376 TOTAL HEATING UNITS LAST SEASON TO DATE......6179 DIFFERENCE......-1225 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............25 WSW AT 10:35 P.M. * AERO..................25 WNW AT 11:11 P.M. ASOS..................25 W AT 10:35 P.M. DAVIS.................25 WSW AT 10:34 P.M. RMY 26 THE FASTEST MILE FOR YESTERDAY...........19 SSW AT 3:07 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............18 W AT 10:36 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........19 SSW AT 3:07 P.M. AVERAGE WIND SPEED AND DIRECTION........9.2 S ASOS.................8.8 DAVIS................8.0 SSW [206 deg.] * Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.03 DEPARTURE...........-0.14 ASOS..............0.03 TOTAL PRECIPITATION FOR THE MONTH..........1.93 DEPARTURE...........+0.59 ASOS..............1.87 TOTAL PRECIPITATION FOR THE YEAR..........15.17 DEPARTURE...........-8.83 ASOS.............15.12 PRELIMINARY CLIMATE SUMMARY FOR JUNE 2012 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant RMY: RMY = R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 6/1 67/53/60/-2/0.00/.../.. 28 ENE AERO 28 MPH ENE RMY 29 6/2 63/52/58/-4/0.80/.../.. 39 SE AERO 39 MPH SE RMY 40 6/3 62/50/56/-6/0.01/.../.. 31 N AERO 28 MPH N RMY 29 6/4 50/47/49/-14/..../000/00 44 NNE AERO 43 MPH NNE RMY 43 6/5 54/47/51/-12/..../.../.. 23 NNE AERO 18 MPH NNE RMY N/A 6/6 63/48/56/-7/0.01/.../.. 16 ENE AERO 14 MPH ENE RMY 15 6/7 70/50/60/-4/0.27/.../.. 31 NE AERO 31 MPH NE RMY 32 TSTM 6/8 76/51/64/0/0.03/.../.. 25 WSW AERO 25 MPH WNW RMY 26 TSTM 6/9 morning low temp: 56F; the normal low is now 55F DAILY RECORDS FOR JUNE 2012 6/4 - NEW DAILY RECORD LOW MAXIMUM TEMP OF 50F; surpasses the previous record of 51F in 1891. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 9 HIGH 94F IN 2008 LOW 40F IN 1980 PRECIP 2.08 INCHES IN 1931 PEAK GUST 67 MPH NW IN 1973 RECORDS FOR JUNE 10 HIGH 98F IN 2008 LOW 42F IN 1913,1920 PRECIP 2.51 INCHES IN 1931 PEAK GUST 60e MPH NW IN 1941 TODAY'S REPORT PREPARED BY: Mike Iacono