BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, JUNE 9, 2004 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] DISCUSSION TODAY AT 2 P.M..... The temperature reached 90.0 in the Hazen shelter by 2 p.m. and was our first 90-degree reading of the year and since 90 degrees on July 5, 2003. Last June had a high of 91 degrees on the 25th. The dewpoint touched 70 degrees for the first time this year early this afternoon as the wet bulb temperature soared to 75 degrees by 2 p.m. TODAY'S OBS... 6/9/2004 WED 8 a.m. partial obscurement with 1/8 with haze visibility 5 miles in haze; temp. 73; dewpoint 62; wind sw at 13 gusting 21 mph; six hourly minimum temp. 67 deg... BHO SA 1155 -X 5H 156/73/62/2311G18/999/ H1/ 58001 10073 20067 11 a.m. clear with 8 miles visibility and hazy; temp. 84; dewpoint 68; wind wsw at 16 gusting 22 mph... BHO SA 1455 CLR 8 143/84/68/2414G19/995/ FEW CI HAZY/ 8/001 56013 2 p.m. scattered cu and high thin overcast with visibility of 9 miles and hazy; temp. 89; dewpoint 69; rh 52%; wind w at 15 mph; six hourly maximum temp. 90 degrees... BHO SA 1755 50 SCT 250 -OVC 9 124/89/69/2713/990/ HAZY/ 8/107 58019 10090 20073 WEATHER SUMMARY FOR TUESDAY, JUNE 08: TIMES: EASTERN DAYLIGHT TIME TEMPERATURE (DEGREES F) MAX.....87 NORMAL.....74 HAZEN SHELTER: 87.2 @ MIN.....57 NORMAL.....54 HAZEN SHELTER: MEAN....72 NORMAL.....64 DEPARTURE FROM 30-YEAR NORMAL...... + 8 TOTAL DEPARTURE FOR THE MONTH..... -28 JUNE IS AVERAGING AROUND 3.7 DEGREES COOLER THAN NORMAL DAILY.... HEATING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY....... 0 DEPARTURE..... 0 TOTAL HEATING DEGREE DAYS FOR THE MONTH...... 52 DEPARTURE.... +22 TOTAL HEATING DEGREE DAYS FOR THE SEASON....6265 DEPARTURE.....-65 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6833 DIFFERENCE...-568 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........29 SSW AT 3:34 P.M. AEROVANE.........31 SSW AT 5:20 P.M. ** ASOS.............28 SSW AT 3:35 P.M. DAVIS............31 SSW AT 5:20 P.M. FASTEST MILE FOR YESTERDAY..........22 SSW AT 7:07 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......23 SSW AT 7:07 P.M. ** also earlier occurrence OUR AVERAGE WIND SPEED/DIRECTION....10.5 SW [wind speed uncorrected] ASOS AVERAGE WIND SPEED.............11.4 DAVIS AVERAGE WIND SPEED/DIRECTION..11.0 WSW [ 239 deg ] PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT) TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.00 DEPARTURE....-0.13 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.93 DEPARTURE....-0.11 ASOS..............0.92 TOTAL PRECIPITATION FOR THE YEAR..........21.85 DEPARTURE....-0.93 [corrected] ASOS.............20.17 PRELIMINARY CLIMATE SUMMARY FOR JUNE 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 6/1 51/46/49/-13/0.32/000/00 28 MPH E 6/2 74/46/60/-2/0.08/.../.. 31 MPH WNW TSTM 6/3 72/50/61/-1/0.21/.../.. 40 MPH NW TSTM *Aerovane 46 MPH NW 6/4 72/47/60/-3/0/.../.. 21 MPH S 6/5 69/50/60/-3/0/.../.. 35 MPH E Aerovane 35 MPH E 6/6 55/48/52/-11/0.32/000/00 31 MPH NE 6/7 6/8 87/57/72/+8/0/.../.. 29 MPH SSW During June to date there has been one daily record established so far for the month... The low maximum temp. of 51 degrees on the 1st edged out the previous low maximum for the date of 52 degrees in 1922 and 1984. * gust not associated with TSTM...but rather a rain/wind squall... DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 09 HIGH 92F IN 1984 LOW 40F IN 1980 PRECIP 2.08 INCHES IN 1931 PEAK GUST 67 MPH NW IN 1973 RECORDS FOR JUNE 10 HIGH 92F IN 1967,1974,1984 LOW 42F IN 1913,1920 PRECIP 2.51 INCHES IN 1931 PEAK GUST 60e MPH NW IN 1941 RECORDS FOR JUNE 11 HIGH 92F IN 1973,1984,1997 LOW 40F IN 1972 PRECIP 2.66 INS 1922 PEAK GUST 43e MPH S IN 1945 TODAY'S REPORT BY: Robert Skilling