BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, MAY 26, 2014 MEMORIAL DAY ALL TIMES ARE IN EASTERN STANDARD TIME PERSISTENT CLOUDS AND SOME LIGHT SHOWERS HOLD TEMPERATURES TO THE LOW TO MID-70'S Light showers since 7 to 8 A.M. EDT this morning left 0.03 inch and another 0.02 in. fell a little later. Very little sunshine has been recorded preventing any significant temperature rise. Today's Observations: 7 A.M. Weather: Overcast altostratus, altocumulus, bright sky NNE-E, bright spots in overcast, virga/showers of rain vicinity of station E-SSW, virga distant NW-N, light rain shower began 6:15 A.M. ended 6:50 A.M. Temperature: 56F; Dew Point: 53F; Wind: WSW at 12 kts Sea-level pressure: 29.99 ins. Hg, rising Visibility: 35 miles, except 50 miles NE, 20 miles SE-S, 45 miles WNW, rain showers ESE-SSW 6-hr max temp: 58F 6-hr min temp: 52F 6-hr precip: 0.03 in. 24-hr precip: 0.03 in. BHO SA 1155 E65 OVC 35 154/56/53/2412/999/ BRGHT SKY NNE-E BRGHT SPTS IOVC IRGA/SHRA VC E-SSW VIRGA DSNT NW-N VSBY NE 50 SE-S 20 WNW 45 RB15E50/ 8/07/ 53005 ASOS 60002 MANUAL 6002/ ASOS 70002 MANUAL 70003 10058 20052 10 A.M. Weather: Broken altocumulus, overcast cirrus/dense cirrus, thin spots and small break in overcast overhead-W-NW Temperature: 64F; Dew Point: 57F; Wind: WSW at 12 kts Sea-level pressure: 29.93 ins. Hg, falling Visibility: 25 miles, hazy 3-hr precip: 0.02 in. BHO SA 1455 E100 BKN 200 OVC 25 137/64/57/2512/993/ DRK DSNT NE-SE THN SPTS/SML BINOVC OVHD-W-NW HAZY/ 8/072 58017 ASOS 60002 MANUAL 6002/ 1 P.M. Weather: Broken broken altocumulus, overcast altocumulus, bright spots in overcast, light rain showers, very light Temperature: 69F; Dew Point: 56F; Wind: W at 14 kts, Sea-level pressure: 29.90 ins. Hg, falling then more slowly Visibility: 35 miles, light distant haze 6-hr max temp: 74F 6-hr min temp: 56F 6-hr precip: 0.02 BHO SA 1755 E95 BKN 120 OVC 35RW- 125/69/56/2714/990/ BRGHT SPTS IOVC PCPN VRY LGT/ 8/07/ 56012 ASOS 60002 MANUAL 60002 10074 20056 WEATHER SUMMARY FOR SUNDAY, MAY 25, 2014 TEMPERATURE (DEGREES F) MAX.....71 NORMAL.....69 MIN.....49 NORMAL.....51 MEAN....60 NORMAL.....60 DEPARTURE FROM 30-YEAR NORMAL...........................0 TOTAL DEPARTURE FOR THE MONTH.........................+76* [+2.8 DEGREES/DAY]* * corrected from yesterday's report...... HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............5 DEPARTURE..........-1 TOTAL HEATING UNITS FOR THE MONTH.............165 DEPARTURE.........-69 TOTAL HEATING UNITS FOR THE SEASON...........6336 DEPARTURE.........+67 TOTAL HEATING UNITS LAST SEASON TO DATE......5707 DIFFERENCE.......+629 COOLING DEGREE DAYS (SEASON JAN-DEC) TOTAL COOLING UNITS FOR YESTERDAY..............0 DEPARTURE..........-1 TOTAL COOLING UNITS FOR THE MONTH.............13 DEPARTURE..........-1 TOTAL COOLING UNITS FOR THE SEASON............13 DEPARTURE..........-3 TOTAL COOLING UNITS LAST SEASON TO DATE........6 DIFFERENCE.........+7 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................20 S AT 5:12 P.M. ASOS.......................23 S AT 5:07 P.M. DAVIS......................22 SSW AT 5:05 P.M. RMY N/A FASTEST MILE FOR YESTERDAY....................18 SSW AT 5:07 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................18 SSW AT 5:07 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................17 SSW AT 5:06 P.M. AVERAGE WIND SPEED AND DIRECTION............. 6.4 S ASOS.......................7.1 DAVIS......................5.6 S [190 deg] * Last of several occurrences... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.03 DEPARTURE.............-0.13 ASOS..............0.02 TOTAL PRECIPITATION FOR THE MONTH..........2.44 DEPARTURE.............-0.77 ASOS..............2.43 TOTAL PRECIPITATION FOR THE YEAR..........21.56 DEPARTURE.............-0.20 ASOS.............21.96 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE...............0.0 TOTAL SNOWFALL FOR THE MONTH................0.0 DEPARTURE...............0.0 TOTAL SNOWFALL FOR THE SEASON..............85.6 DEPARTURE.............+22.9 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 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/.../.. 18 ESE RMY 20 5/22 67/51/59/0/..../0.0/.../.. 15 SSE RMY 18 5/23 60/49/55/-4/..../0.0/.../.. 16 NE RMY 18 5/24 65/49/57/-2/..../0.0/.../.. 17 ENE RMY 18 5/25 71/49/60/0/0.00/0.0/.../.. 20 S RMY N/A 5/26 morning low temp: 52F; the normal low is now 51F DAILY RECORDS FOR MAY 2014 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 26 HIGH 94F IN 2010 (RECORD FOR MAY) LOW 37F IN 1972,2013 PRECIP 1.73 INS IN 2003 SNOWFALL TRACE IN 1967 (Fell as ice pellets in nor'easter) PEAK GUST 62 MPH NE IN 1967 RECORDS FOR MAY 27 HIGH 92F IN 1914 LOW 36F IN 1915 PRECIP 1.40 INS IN 1898 PEAK GUST 55 S IN 1956 TODAY'S REPORT PREPARED BY: Robert Skilling