BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, JULY 14, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME EARLY MORNING CLOUDS BURN OFF, PARTLY SUNNY SKIES PREVAIL HUMIDITY DROPS BUT DEW POINTS STILL IN THE 70'S This morning started off very similarly to yesterday, with the summit here shrouded in fog and stratus fractus drifting by. By 8:00 EST the lowest of the stratocumulus had burned off and we enjoyed partly sunny skies with cumulus humilis and a few moderate/towering cumulus. Winds were very light again today, mainly out of the W at around 5 MPH. I made a mistake in yesterdays precipitation summary, which I have corrected for today. Today's Observations: 7 A.M. Weather: Sun visible through overcast stratocumulus, foggy with stratus fractus drifting over the summit Temperature: 73F; Dew Point: 73F; Wind: WNW at 2 kts, Wind: Light and variable Sea-level pressure: 30.33 ins. Hg, decreasing then increasing Visibility: 2 miles, foggy Visibility: Variable, 1/2 mile N-NNE and ESE-S 24-hr precip: Trace 6-hr min. temp: 71F BHO SA 1155 010 OVC 2-F 271/73/73/2902/033/ SUN VSBL THRU BINOVC LOW STFRA DFTNG NNW-NNE AND ESE-SE AND OVR SMT WIND LGHT AND VBL/ 8/2// 53008 7000T 10073 20071 10 A.M. Weather: Scattered cumulus humilis, few moderate/towering cumulus SSE-SW, cirrostratus distant E-SSE Temperature: 83F; Dew Point: 73F; Wind: W at 6 kts, Wind: Light and variable Sea-level pressure: 30.30 ins. Hg, decreasing then decreasing more slowly Visibility: 50 miles, light haze BHO SA 1455 035 SCT 50 262/83/73/2706/030/ FEW MDT/T CU SSE-SW CS DSNT E-SSE WIND LT AND VBL LT HZ/ 8/206 56009 1 P.M. Weather: Scattered cumulus congestus, few moderate/towering cumulus SSW, scattered stratocumulus distant ESE-WNW Temperature: 84F; Dew Point: 71F; Wind: WNW at 6 kts, Sea-level pressure: 30.28 ins. Hg, decreasing then decreasing more rapidly Visibility: 70 miles, light distant haze 6-hr max. temp: 85F BHO SA 1755 070 SCT 70 253/84/71/3006/028/ FEW MDT/TCU SSW SCT SC DSNT ESE-WNW LT DSNT HZ/ 8/400 58009 10085 20073 WEATHER SUMMARY FOR SATURDAY, JULY 13, 2013 TEMPERATURE (DEGREES F) MAX.....75 NORMAL.....81 MIN.....62 NORMAL.....63 MEAN....69 NORMAL.....72 DEPARTURE FROM 30-YEAR NORMAL.....................-3 TOTAL DEPARTURE FOR THE MONTH....................+49 [+3.8 DEGREES/DAY] PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY................21 ENE AT 5:36 A.M. AERO.....................20 ENE AT 5:46 A.M.* ASOS.....................22 NE AT 5:45 A.M. DAVIS....................21 ENE AT 5:44 A.M. RMY N/A FASTEST MILE FOR YESTERDAY..................14.5 ENE AT 5:44 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...............15 ENE AT 5:37 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..............14 NE AT 5:37 A.M. AVERAGE WIND SPEED AND DIRECTION...........6.5 ENE ASOS....................6.4 DAVIS...................5.9 ENE [70 deg] *Denotes the latest of multiple occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....Trace DEPARTURE............-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.01 DEPARTURE............-0.51 ASOS..............1.00 TOTAL PRECIPITATION FOR THE YEAR..........33.21 DEPARTURE............+4.72 ASOS..............N/A* *ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals PRELIMINARY CLIMATE SUMMARY FOR JULY 2013 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust 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 7/1 82/69/76/+6/0.05/247/27 29 S AERO 31 MPH SSW RMY 32 7/2 82/61/72/+2/T/100/11 23 SSW AERO 23 MPH SSW RMY 25 7/3 87/62/75/+4/T/556/61 28 SW AERO 30 MPH SW RMY 30 7/4 90/71/81/+10/0.00/811/89 25 WSW AERO 26 MPH SW RMY 28 7/5 92/73/83/+12/0.00/874/96 24 W AERO 25 MPH WSW RMY 25 7/6 90/73/82/+11/0.00/836/92 25 WNW AERO 25 MPH WNW RMY 26 7/7 91/72/82/+11/0.21/508/56 38 SSW AERO 43 MPH SSW RMY 44 TSTM 7/8 82/64/73/+1/0.04/.../.. 18 NE AERO 20 MPH NE RMY 20 TSTM 7/9 72/63/68/-4/0.01/.../.. 14 ENE AERO 14 MPH ENE RMY 14 7/10 84/65/75/+3/T/.../.. 32 S AERO 36 MPH S RMY 35 7/11 79/69/74/+2/0.62/.../.. 23 W AERO 23 MPH W RMY N/A 7/12 70/62/66/-6/0.07/.../.. 29 NE AERO 29 MPH NE RMY 30 7/13 75/62/69/-3/T/.../.. 21 ENE AERO 20 MPH ENE RMY N/A 7/14 morning low temp: 69F; the normal low is now 63F DAILY RECORDS FOR JULY 2013 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JULY 14 HIGH 98F IN 1952 LOW 51F IN 1895, 1937 PRECIP 1.97 INS IN 1960 WIND 110e MPH NW IN 1942 [RECORD FOR MONTH] RECORDS FOR JULY 15 HIGH 94F IN 1995 LOW 50F IN 1929, 1930 PRECIP 1.64 INS IN 1896 WIND 71 MPH WNW IN 2002 TODAY'S REPORT PREPARED BY: Forrest Iwanik