BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY CLIMATE SUMMARY WEDNESDAY, JUNE 30, 2004 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] TODAY'S DISCUSSION AT 2 P.M. The temperature reached the 80-degree mark early this afternoon for the first time since 80 degrees on June 24. It continues very dry again today with dewpoints in the upper 40's by late morning and early afternoon. Visibility got up to 70 miles under cloud dotted skies. A very thin layer of either dust or smoke or a combination of both was detected by visual observation at very high levels in the atmosphere by mid-morning and continuing into this afternoon. TODAY'S OBS... 6/30/2004 WED 8 a.m. clear--not a cloud to be seen with 30 miles visibility; temp. 65; dewpoint 56; wind wsw at 08 mph; six hourly min. temp. 59 deg. BHO SA 1155 CLR 30 201/65/56/2407/012/ THN K ALG HRZN S-NW LGT HZ ALQDS/ 53011 10065 20059 11 a.m. clear with few cumulus forming distant; visibility 60 miles; temp. 75; dewpoint 48; wind west at 16 mph... BHO SA 1455 CLR 60 199/74/48/2614/012/ FEW CU FRMG DSNT ESE-SSE AND DSNT WSW-N FEW AC DSNT SW FEW CI DSNT NW THN DU/K LYR ALF E-SW/ 8/141 58002 2 p.m. sunny with cumulus clouds visbility 70 miles; temp. 79; dewpoint 49; rel humidity 34%; wind west at 14 gusting 22 mph and gust to 27 mph past hour; six hourly maximum temp. 79 deg. BHO SA 1755 CLR 70 199/79/49/2612G19/012/ FEW CUFRA/CU FEW CI DSNT NW PTCHY THN DU/K LYR ALF WND 23V30 GST 23 KTS PST HR/ 8/101 50000 10079 20065 WEATHER SUMMARY FOR TUESDAY JUNE 29: TIMES: EASTERN DAYLIGHT TIME TEMPERATURE (DEGREES F) MAX.....74 NORMAL.....79 Hazen shelter: 74.0... @ 5:36 p.m. MIN.....57 NORMAL.....59 Hazen shelter: 56.7... @ 5:44 a.m. MEAN....66 NORMAL.....69 DEPARTURE FROM 30-YEAR NORMAL...... - 3 TOTAL DEPARTURE FOR THE MONTH...... - 21 JUNE IS AVERAGING NEAR NORMAL DAILY....0.9 DEGREE COOLER THAN NORMAL HEATING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY....... 0 DEPARTURE.....-1 TOTAL HEATING DEGREE DAYS FOR THE MONTH...... 78 DEPARTURE.... +6 TOTAL HEATING DEGREE DAYS FOR THE SEASON....6291 DEPARTURE.....-79 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6890 DIFFERENCE...-599 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........23 W AT 5:51 a.m. AEROVANE.........24 W AT 5:51 a.m. ASOS.............21 W AT 5:51 a.m. DAVIS............26 W AT 5:50 a.m. MAXIMUM 2-MINUTE ASOS AVERAGE.......18 E AT 5:35 a.m. OUR FASTEST MILE FOR YESTERDAY......15 SW AT 11:20 p.m. ** ** last of several two occurrences from different directions including ESE and W. OUR AVERAGE WIND SPEED/DIRECTION.... 6.9 WNW ASOS AVERAGE WIND SPEED............. 7.4 SW [230 deg ] DAVIS AVERAGE WIND SPEED/DIRECTION.. 6.6 W [265 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..........1.95 DEPARTURE....-1.85 ASOS..............1.95 TOTAL PRECIPITATION FOR THE YEAR..........22.87 DEPARTURE....-2.67 ASOS.............21.32 PRELIMINARY CLIMATE SUMMARY FOR JUNE 2004......CALENDAR DAY DATA DATA REPORTED: 24 HOUR PERIODS ENDING MIDNIGHT EST 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/-2/0.08/254/28 31 MPH WNW TSTM 6/3 72/50/61/-1/0.21/463/51 40 MPH NW TSTM *Aerovane 46 MPH NW 6/4 72/47/60/-3/0/835/92 21 MPH S 6/5 69/50/60/-3/0/501/55 35 MPH E 6/6 55/48/52/-11/0.32/000/00 31 MPH NE 6/7 73/48/61/-3/T/428/47 21 MPH S 6/8 87/57/72/+8/0/793/87 29 MPH SSW 6/9 90/67/79/+15/0.23/813/89 29 MPH SW TSTM 6/10 69/54/62/-2/0.05/146/16 32 MPH NE 6/11 70/49/60/-5/0/887/97/ 27 MPH NW 6/12 71/49/60/-5/0/897/98 23 MPH S 6/13 74/51/63/-2/0/805/88 31 MPH S 6/14 69/54/62/-3/0/T/027/03 32 MPH S 6/15 86/62/74/+8/0/669/73 30 MPH W 6/16 85/66/76/+10/0/824/90 20 MPH NW 6/17 85/63/74/+8/0/0.01/110/12 20 MPH ENE 6/18 65/60/63/-3/0/0.01/000/00 23 MPH ENE 6/19 80/58/69/+6/0.06/459/50 36 MPH W 6/20 71/51/61/-6/0/907/99 30 MPH NW 6/21 76/52/64/-3/0/899/98 31 MPH WSW 6/22 74/58/66/-1/T/110/12 30 MPH S 6/23 82/63/73/+5/0/789/86 25 MPH WNW NEW ASOS WEIGHING GAGE INSTALLED 6/24 80/59/70/+2/0/0/889/97 28 MPH S 6/25 77/59/68/0/0.32/256/28 26 MPH S TSTM [corrected to add TSTM ] 6/26 75/56/66/-2/0.26/147/16 30 MPH WNW 6/27 75/52/64/-5/0/869/95 31 MPH WSW 6/28 75/55/65/-4/0/412/45 29 MPH W 6/29 74/57/66/-3/0.08/558/61 23 MPH W 6/30 morning low temp. 59 deg; normal now 60 deg. 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 30 HIGH 94F IN 1964 LOW 47F IN 1919 PRECIP 3.04 INS IN 1921 PEAK GUST 51 MPH WNW IN 1957 RECORDS FOR JULY 01 HIGH 98F IN 1964 LOW 44F IN 1988 [RECORD FOR MONTH] PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH] PEAK GUST 52 MPH WNW IN 1974 TODAY'S REPORT BY: Robert Skilling/Kim Jeffs