BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JUNE 5, 2014 ALL TIMES ARE IN EASTERN STANDARD TIME THICK FOG AND RAIN MOVE IN THIS MORNING Yesterday's 24-hour average wind speed of 5.0 MPH SE falls very far down on the list of windy days here on top of Great Blue Hill. Historically wind averages nearly three times that speed, with peak gusts much higher than yesterday's 16 MPH. Rain has been falling almost continuously all morning, with 0.03 inches falling overnight, and 0.12 inches between 7:00 and 10:00 AM EST. By 1:00 PM EST and additional 0.31 inches fell. Visibility has also been greatly reduced for the majority of the morning to 1/16 or less at times. More monthly statistics and analysis will follow in the coming days, so pleased check back on BlueHill.org for more information. THE PRELIMINARY MAY 2014 STATS [Departures are relative to the 1981-2010 averages] TEMPERATURE: Deg. F Avg. Max. 67.7 [+1.4] Avg. Min. 48.3 [+0.5] Mean 58.0 [+0.9] 24-hr. corrected mean: 57.3 Max. temp: 85F on the 12th Min. temp: 39F on the 29th Total heating degree day units: 223 [-45] Total seasonal heating units: 6394 [91 more than average] [Season starts 7/1] Seasonal total this date 2013: 5734 [660 more than last season] Total cooling degree day units: 13 [-9] Total seasonal cooling units: 13 [-11 less than average] [Season starts 5/1] Seasonal total this date 2013: 31 [-18 less than last season] PRECIPITATION: Inches Total: 3.22 [-0.89] Greatest in 24 hours: 1.30 (16-17th) Total snowfall: 0 [+/-0.0] Greatest in 24 hours: 0 WIND Av. speed (uncorrected): 10.9 mph Av. speed (corrected): 11.4 mph Prevailing direction: S 12% SUNSHINE Total astronomical minutes: 12,688 of possible 27,136 or 47% Total Campbell Stokes card minutes; 12,276 of possible 26,226 or 47% Today's Observations: 7 A.M. Weather: Thick fog Temperature: 60F; Dew Point: 59F; Wind: estimated N at 4 kts Wind Speed: Light Sea-level pressure: 29.76 ins. Hg, rising, then falling, but higher Visibility: 1/16 of a mile, obscured by thick fog 6-hr max temp: 60F 6-hr min temp: 58F 24-hr precip: 0.08 BHO SA 1155 W3 X 1/16F 079/60/59/E0104/976/ RE45 WND LGT/ 8//// 53003 ASOS 60002 70007 MANUAL 70008 10060 20058 10 A.M. Weather: Light rain and thick fog Temperature: 58F; Dew Point: 58F; Wind: NNE at 7 kts Sea-level pressure: 29.72 ins. Hg, falling, then more slowly Visibility: 1/16 of a mile, obscured by thick fog and light rain 3-hr precip: 0.12 BHO SA 1455 W3 X 1/16R-F 067/58/58/0207/972/ 8//// 56009 ASOS 60011 MANAUAL 60012 1 P.M. Weather: Light rain, thick fog Temperature: 56F; Dew Point: 56F; Wind: NE at 12G18 kts Sea-level pressure: 29.66 ins. Hg, falling, then falling more quickly Visibility: 1/8 of a mile, obscured by thick fog and light rain 6-hr max temp: 60F 6-hr min temp: 56F 3-hr precip: 0.31 inches BHO SA 1755 W3 X 1/8R-F 043/56/56/0412G18/966/ 8/// 58024 ASOS 60043 MANUAL 60043 10060 20056 WEATHER SUMMARY FOR WEDNESDAY, JUNE 4, 2014 TEMPERATURE (DEGREES F) MAX.....64 NORMAL.....72 MIN.....52 NORMAL.....54 MEAN....58 NORMAL.....63 DEPARTURE FROM 30-YEAR NORMAL..........................-5 TOTAL DEPARTURE FOR THE MONTH..........................+5 [+1.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............7 DEPARTURE..........+3 TOTAL HEATING UNITS FOR THE MONTH..............12 DEPARTURE..........-6 TOTAL HEATING UNITS FOR THE SEASON...........6406 DEPARTURE.........+85 TOTAL HEATING UNITS LAST SEASON TO DATE......5740 DIFFERENCE.......+666 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............0 DEPARTURE..........-2 TOTAL COOLING UNITS FOR THE MONTH..............6 DEPARTURE..........-1 TOTAL COOLING UNITS FOR THE SEASON............19 DEPARTURE.........-12 TOTAL COOLING UNITS LAST SEASON TO DATE.......57 DIFFERENCE........-38 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................16 SE AT 4:48 A.M. ASOS.......................17 ESE AT 4:49 A.M. DAVIS......................17 ESE AT 4:50 A.M. RMY N/A FASTEST MILE FOR YESTERDAY....................15 SE AT 4:48 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................14 SE AT 4:50 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................14 SE AT 4:48 A.M. AVERAGE WIND SPEED AND DIRECTION..............5.0 SE ASOS.......................5.5 DAVIS......................4.8 ESE [119 deg] * Last of several occurrences... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.08 DEPARTURE.............-0.09 ASOS..............0.07 TOTAL PRECIPITATION FOR THE MONTH..........0.14 DEPARTURE.............-0.52 ASOS..............0.13 TOTAL PRECIPITATION FOR THE YEAR..........22.48 DEPARTURE.............-0.84 ASOS.............22.84 PRELIMINARY CLIMATE SUMMARY FOR MAY 2014 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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 5/1 64/43/54/+1/0.49/0.0/093/11 32 SSE RMY 36 5/2 68/51/60/+7/T/0.0/457/54 28 W RMY 29 5/3 66/48/57/+4/0.00/0.0/332/39 21 SW RMY N/A 5/4 60/47/54/0/0.01/0.0/400/47 51 WNW RMY 54 5/5 64/46/55/+1/T/0.0/592/70 30 NW RMY 32 5/6 63/42/53/-1/T/0.0/506/59 30 NW RMY 30 5/7 64/42/55/0/0.00/0.0/850/99 21 WNW RMY 23 5/8 69/48/59/+4/0.00/0.0/612/71 17 SSW RMY 19 5/9 57/51/54/-1/0.05/0.0/000/00 21 S RMY N/A 5/10 78/57/68/+13/0.10/0.0/043/05 33 S RMY 37 TSTM 5/11 79/58/69/+13/0.01/0.0/746/86 30 W RMY N/A 5/12 85/49/67/+11/0.00/0.0/792/91 39 NE RMY 42 5/13 54/42/48/-8/0.00/0.0/113/13 32 NE RMY N/A 5/14 73/42/58/+1/T/ 0.0/613/70 22 S RMY 24 5/15 77/57/67/+10/T/0.0/140/16 27 S RMY 33 5/16 73/60/67/+10/0.26/0.0/026/03 36 S RMY 41 5/17 74/52/63/+6/1.04/0.0/555/63 36 SSE RMY N/A 5/18 67/47/57/-1/0.00/0.0/521/59 20 NW RMY N/A 5/19 65/48/56/-2/0.12/0.0/443/50 35 NNW RMY 38 5/20 71/48/60/+2/T/0.0/771/89 25 NNW RMY 26 5/21 71/51/61/+2/0.00/0.0/844/95 18 ESE RMY 20 5/22 67/51/59/0/0.26/0.0/116/13 15 SSE RMY 18 5/23 60/49/55/-4/0.05/0.0/000/00 16 NE RMY 18 5/24 65/49/57/-2/0.02/0.0/277/31 17 ENE RMY 18 5/25 71/49/60/0/0.00/0.0/430/48 20 S RMY N/A 5/26 76/52/64/+4/0.05/0.0/108/12 30 W RMY 34 5/27 74/47/61/+1/0.37/0.0/242/27 25 NE RMY 31 TSTM 5/28 48/40/44/-17/0.30/0.0/000/00 32 NE RMY 35 5/29 61/39/50/-11/0.00/0.0/847/94 17 NNE RMY 18 5/30 71/45/58/-3/0.09/0.0/550/61 20 S RMY 22 TSTM 5/31 60/49/55/-6/0.00/0.0/669/74 22 NE RMY 25 6/1 72/47/60/-2/0.00/0.0/.../.. 21 NNW RMY 21 6/2 81/52/67/+5/0.00/0.0/.../.. 22 SSW RMY 23 6/3 81/57/69/+7/..../.../.../.. 25 SSE RMY 28 6/4 64/52/58/-5/..../.../.../.. 16 SE RMY N/A 6/5 morning low temp: 57F; the normal low is now 54F 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 5 HIGH 95F IN 1930 LOW 41F IN 1891 PRECIP 2.83 INS IN 1982 PEAK GUST 57 MPH NNW IN 1988 RECORDS FOR JUNE 6 HIGH 95F IN 1925 LOW 42F IN 1885, 1894, 1920, 1945 PRECIP 3.61 INS IN 2000 PEAK GUST 58 MPH NE IN 2000 TODAY'S REPORT PREPARED BY: Brian Fitzgerald