BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, MAY 24, 2004 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] Early morning thunderstorms left only 0.15 inch as compared to 0.24 inch for Sunday morning's storms.... Today's observations: 5/24/2004 MON 8 a.m. obscurement with fog with light drizzle and fog and visibility of 1/16 mile, temp. dewpoint 48; wind ene at 07 mph; six hour minimum temp. 47; 24 hour rainfall 0.15 inch BHO SA 1155 W2 X 1/16F 131/48/48/0606/992/ 8//// 55004 ASOS 60006 MANUAL 6006/ ASOS 70015 MANUAL 70015 10049 20047 11 a.m. low overcast with 1 mile in fog; temp dewpoint 49; wind east at 12 mph; three hour precipitation 0.01 inch... BHO SA 1455 E3 OVC 3/4VF 129/49/49/1010/991/ CIG RGD STRA DRFTNG OVR/BLO SMT VSBY 1/2V1 CDNS VRBL VSBY E 1/8 W 2/ 8/6// 58002 ASOS 60001 MANUAL 6001/ WEATHER SUMMARY FOR SUNDAY, MAY 23: TEMPERATURE (DEGREES F) MAX.....68 NORMAL.....69 MIN.....46 NORMAL.....49 MEAN....57 NORMAL.....59 DEPARTURE FROM 30-YEAR NORMAL.....-2 TOTAL DEPARTURE FOR THE MONTH.....+103 (+4.3 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY....... 8 DEPARTURE....+ 1 TOTAL HEATING DEGREE DAYS FOR THE MONTH......133 DEPARTURE....- 93 TOTAL HEATING DEGREE DAYS FOR THE SEASON....6126 DEPARTURE....- 126 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6702 DIFFERENCE...- 576 PEAK GUST AND AVERAGE WIND SPEED (MPH)(ALL TIMES LOCAL DAYLIGHT TIME) PEAK WIND GUST FOR YESTERDAY........27 NW AT 4:26 a.m. AEROVANE.........32 NW AT 4:26 a.m. ASOS.............25 NW AT 4:26 a.m. DAVIS............26 NW AT 4:25 a.m. FASTEST MILE FOR YESTERDAY...........19 NW AT 4:26 a.m. MAXIMUM 2-MINUTE ASOS AVERAGE........22 NW AT 4:26 a.m. AVERAGE WIND SPEED AND DIRECTION... 6.3 ENE ASOS.............. 5.8 DAVIS............. 6.0 ENE PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT) TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.15 DEPARTURE....+0.03 ASOS..............0.15 TOTAL PRECIPITATION FOR THE MONTH..........2.33 DEPARTURE....-0.52 ASOS..............2.32 TOTAL PRECIPITATION FOR THE YEAR..........19.68 DEPARTURE....-1.12 ASOS.............18.12 2003-2004 SNOWFALL (INCHES) TOTAL SNOWFALL FOR THE SEASON..............58.0 DEPARTURE....+1.7 PRELIMINARY CLIMATE SUMMARY FOR MAY 2004......CALENDAR DAY DATA DATA REPORTED: DATE MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 5/1 78/50/64/+12/ 0/769/91 39 MPH SSW 5/2 72/56/64/+12/0.06/127/15 45 MPH S Aerovane 49 MPH S 5/3 61/47/54/ +1/0.66/000/00 35 MPH S 5/4 58/39/49/ -4/0.32/725/85 40 MPH WNW Aerovane 46 MPH WNW 5/5 65/38/52/ -1/ T/453/53 37 MPH S 5/6 70/45/58/ +4/ 0/711/83 28 MPH SSW 5/7 84/48/66/+12/0.04/730/85 40 MPH W Aerovane 41 MPH W 5/8 63/41/52/ -2/ 0/621/72 28 MPH S 5/9 55/44/50/-5/0.33/043/05 30 MPH SW 5/10 70/49/60/+5/0/632/73 29 MPH S 5/11 86/53/70/+15/T/573/66 27 MPH WNW 5/12 87/58/73/+17/0/513/59 24 MPH W 5/13 72/43/58/+2/T/610/70 31 MPH NE 5/14 77/45/61/+4/T/533/61 26 MPH S 5/15 88/58/73/+16/0/745/85 35 MPH WSW 5/16 68/49/59/+2/0.08/009/01 30 MPH ENE 5/17 69/49/59/+2/0/415/47 25 MPH S 5/18 71/51/61/+3/0.42/132/15 33 MPH SSW Aerovane 37 MPH SSW 5/19 69/54/62/+4/0.02/.../.. 25 MPH NNW 5/20 75/50/63/+5/0/.../.. 29 MPH SSW 5/21 77/51/65/+6/T/.../.. 29 MPH S 5/22 62/46/54/-5/T/.../.. 21 MPH NNW 5/23 68/46/57/-2/0.24/.../.. 27 MPH NW TSTM 5/24 morning low 47 rainfall 0.15 TSTM DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 24 HIGH 92F IN 1964 LOW 35F IN 1956 PRECIP 2.13 INS IN 1951 PEAK GUST 50e MPH NNW IN 1941 RECORDS FOR MAY 25 HIGH 89F IN 1981 LOW 37F IN 1967 PRECIP 3.73 INS IN 1967 PEAK GUST 83 MPH NE IN 1967 (RECORD FOR MAY) TODAY'S REPORT BY: Robert Skilling