BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, MAY 10, 2004 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] DISCUSSION....EARLY THIS AFTERNOON.... Temperatures have reached the lower 60's with a light northeast to north-northeast wind early this afternoon. Rainfall yesterday totaled 0.33 inch here and brought the monthly total to 1.41 inches or about 1/3 of an inch wetter than normal. May temperatures continue to run warmer than normal by 3 degrees through the first nine days of the month. Today's observations: 8 a.m. high thin scattered clouds with 6 miles visibility in light fog; temp 53; dewpoint 49; wind ne at 07 mph.. six hour minimum temp. 49; 24 hours precip. 0.33 inch BHO SA 1155 300 -SCT 6F 231/53/49/0406/021/ FEW AC DSNT WNW FEW LWR CI PTCHS DENSE FG DSSPTD BLO SMT PST HR/ 8/048 53014 MANUAL 70033 ASOS 70032 10053 20049 11 a.m. mostly sunny and hazy with 12 miles visibility; 58 deg; dewpoint 49; wind nne at 10 mph... BHO SA 1455 E130 BKN 250 -OVC 12 239/58/49/0209/024/ FEW SC FRMG ESE-SW BINOVC OVC PTLY THN HAZY/ 8/571 51008 2 p.m. sunny with high thin clouds and hazy with 15 miles vsibility but only 10 miles north through northeast with thin fog and/or fog bank; visibility wnw 20 miles, hazy all quadrants, temp. 61 and dewpoint 50; and wind nne at 10 mph; six hour maximum temp. 62 degrees.... BHO SA 1755 30 SCT 120 SCT 300 -OVC 15 215/61/50/0209/017/ SC FRMG E-S-W FEW ACSL BINOVC THN F/FG BNK AND VSBY 10 N-NE HAZY ALQDS VSBY WNW 20 WND 34V06/ 8/547 58024 10062 20053 WEATHER SUMMARY FOR SUNDAY, MAY 9: TEMPERATURE (DEGREES F) MAX.....55 NORMAL.....65 HAZEN.....55.1 @ 7:05 P.M. MIN.....44 NORMAL.....45 HAZEN.....43.5 @ 7:52 A.M. MEAN....50 NORMAL.....55 DEPARTURE FROM 30-YEAR NORMAL.....-5 TOTAL DEPARTURE FOR THE MONTH.....+29 (+3.0 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY.......15 DEPARTURE.....+5 TOTAL HEATING DEGREE DAYS FOR THE MONTH.......77 DEPARTURE....-29 TOTAL HEATING DEGREE DAYS FOR THE SEASON....6070 DEPARTURE....-64 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6545 DIFFERENCE..-475 PEAK GUST AND AVERAGE WIND SPEED (MPH)(ALL TIMES LOCAL DAYLIGHT TIME) PEAK WIND GUST FOR YESTERDAY........30 SW AT 5:59 A.M. AEROVANE.........30 SW AT 5:59 A.M. ASOS.............28 SW AT 5:59 A.M. FASTEST MILE FOR YESTERDAY..........N/A MAXIMUM 2-MINUTE ASOS AVERAGE.......23 SSW AT 9:21 A.M. AVERAGE WIND SPEED AND DIRECTION..11.8 SW ASOS...........12.4 PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT) TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.33 DEPARTURE....+0.21 ASOS..............0.32 TOTAL PRECIPITATION FOR THE MONTH..........1.41 DEPARTURE....+0.29 ASOS..............1.37 TOTAL PRECIPITATION FOR THE YEAR..........18.76 DEPARTURE....-0.31 ASOS.............17.17 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/SNOW/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/.../.. 28 MPH SSW 5/7 84/48/66/+12/0.04/.../.. 40 MPH W Aerovane 41 MPH W 5/8 63/41/52/ -2/ 0/.../.. 28 MPH S 5/9 55/44/50/-5/0.33/.../.. 30 MPH SW 5/10 morning low temp. 49 deg....max thru 2 p.m. 62 deg... DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 10 HIGH 93F IN 1896 LOW 29F IN 1900 PRECIP 1.58 INCHES IN 1998 SNOWFALL 2.8 INCHES IN 1977 PEAK GUST 64 MPH S IN 1990 RECORDS FOR MAY 11 HIGH 90F IN 1993 LOW 28F IN 1900 PRE 1.28 INS IN 1957 SNOW 1.0 INS IN 1907 (LATEST MEASURABLE SNOW ON RECORD) PEAK GUST 75e MPH NW IN 1945 TODAY'S REPORT BY: Robert Skilling