BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, MAY 31, 2005 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] Discussion at 2 p.m. PRELIMINARY STATS FOR MAY 2005 AT BLUE HILL OBSERVATORY SUNSHINE Card burned hours are listed here assuming no sunshine today... 1. 136.1 or 31% in 1888 2. 147.4 or 34% in 2005 3. 150.8 or 35% in 1927 4. 152.4 or 35% in 1983 5. 155.0 or 35% in 2003 So, unless we get 3.5 hours today looks like NUMBER 2 for our lowest sunshine on record for any May! In terms of astronomical minutes the total would be 9183/27136 or 34% or if you like hours it's 153.1 hours. RAINFALL Rainfall for month now at 8.65...at least 3rd highest on record. 20 days [thru 30th ] with measurable rain [0.01 in. or more] may be close if not a new record for May. TEMPERATURE Temp. 24 hrs or 2828/4 = 50.3 thru 30th. Max. 58.8 and min 43.3 also thru 30th. FOG Fog: 18 days with heavy fog [1/4 miles or less] and 11 are consecutive 21st thru 31st. Total days with fog including light fog and heavy fog is 21. Maybe some records or near records here. TODAY'S OBSERVATIONS.... 5/31/2005 TUE 8 a.m. obscurement with heavy fog; visibility 1/16; temp and dewpoint 50; wind nne at 07 mph; six hourly min temp. 50; 24 hourly precip. 0.07 inch BHO SA 1155 W2 X 1/16F 174/50/50/0306/004/ 8//// 53022 MANUAL 70007 ASOS 70006 10056 20050 11 a.m. low stratus overcast with 1.25 miles visibility in thin fog; temp and dewpoint 50; wind north at 09 mph BHO SA 1455 E3 OVC 11/4F 190/50/50/0108/009/ VSBY INCRSNG VSBY SE 11/2 WND 33V06/ 8/6// 51016 2 p.m. low overcast with occassional bright spots in overcast; visibility 4 miles in thin fog; temp. 52; dewpoint 49; wind nne at 12 mph; six hourly max. temp. 54 deg. BHO SA 1755 E5 OVC 4F 196/52/49/0210/011/ OCNL BRGHT SPTS IOVC/ 8/6// 51006 10054 20050 WEATHER SUMMARY FOR MONDAY, MAY 30 MEMORIAL DAY: TEMPERATURE (DEGREES F) MAX.....73 NORMAL.....71 MIN.....52 NORMAL.....51 MEAN....63 NORMAL.....61 DEPARTURE FROM 30-YEAR NORMAL......+2 TOTAL DEPARTURE FOR THE MONTH....-165 (-5.7 DEGREES/DAY) PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.07 DEPARTURE....-0.06 ASOS..............0.06 TOTAL PRECIPITATION FOR THE MONTH..........8.65 DEPARTURE....+4.99 ASOS..............8.59 TOTAL PRECIPITATION FOR THE YEAR..........29.74 DEPARTURE....+8.28 ASOS.............28.62 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........29 NNE AT 3:51 P.M. AEROVANE.........28 NNE AT 3:51 P.M. ASOS.............26 NE AT 4:28 P.M. DAVIS............26 NNE AT 3:48 P.M. FASTEST MILE FOR YESTERDAY..........N/A MAXIMUM 2-MINUTE ASOS AVERAGE.......20 NNE AT 4:52 P.M. DAVIS...............................21 N AT 3:52 P.M. AVERAGE WIND SPEED AND DIRECTION.. N/A SW ASOS........... 8.2 MISSING DAVIS ......... 7.1 W [280 DEG] PRELIMINARY CLIMATE SUMMARY FOR MAY 2005......CALENDAR DAY DATA DATA REPORTED: DATE MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST TSTM: thunderstorm day AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 5/1 57/44/51/-1/0.14/118/14 33 MPH WNW 5/2 63/39/51/-1/0.05/593/70 43 MPH S 5/3 58/38/48/-5/0/604/71 30 MPH WSW 5/4 59/40/50/-3/T/400/47 21 MPH E 5/5 60/38/49/-4/0/777/91 23 MPH E 5/6 54/42/48/-6/0.08/103/12 26 MPH NNE 5/7 44/39/42/-12/1.19/000/00 58 MPH N 5/8 47/39/43/-11/0.22/000/00 43 MPH NNW 5/9 52/43/48/-7/0.04/026/03 36 MPH N 5/10 64/46/55/0/0/502/58 20 MPH E 5/11 75/46/61/+6/0/807/93 27 MPH S 5/12 60/41/51/-5/0/835/96 40 MPH NW 5/13 64/35/50/-6/0/846/97 28 MPH WNW 5/14 64/47/56/-1/T/288/33 21 MPH E 5/15 58/41/50/-7/0.14/132/15 24 MPH N 5/16 57/41/49/-8/0.11/193/22 21 MPH ENE 5/17 65/47/56/-1/0/343/39 21 MPH ESE 5/18 59/45/52/-6/0.01/203/23 28 MPH N 5/19 62/42/52/-6/0.05/681/77 25 MPH WNW 5/20 66/45/56/-2/0/310/35 24 MPH S 5/21 51/43/47/-12/0.31/000/00 35 MPH NNW 5/22 54/43/49/-10/0.03/009/01 30 MPH NW 5/23 48/43/46/-13/0.18/000/00 35 MPH N 5/24 45/41/43/-17/1.53/000/00 54 MPH NNE 5/25 46/41/44/-16/3.31/000/00 62 MPH NNE 5/26 49/43/46/-14/0.82/000/00 51 MPH NNE 5/27 64/49/57/-4/0.08/027/03 26 MPH WSW 5/28 77/53/65/+4/0.02/692/77 30 MPH WSW 5/29 70/53/61/+1/0.27/207/23 27 MPH WNW TSTM 5/30 73/52/63/+2/0.07/487/54 29 MPH NNE TSTM 5/31 morning low temp. 50 deg....no precipitation this morning DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 31 HIGH 92F IN 1944,1987 LOW 35F IN 1961 PRECIP 5.02 INS 1984 (RECORD FOR MAY) PEAK GUST 54e MPH WNW IN 1945 RECORDS FOR JUNE 1 HIGH 90F IN 1937 LOW 36F IN 1945 [Record for month] PRECIP 2.28 INS IN 1992 PEAK GUST 51e MPH SE IN 1952 Today's report by: Robert Skilling