BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY CLIMATE SUMMARY THURSDAY, JULY 8, 2004 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] WARM HUMID AIRMASS ARRIVES TODAY... A brief light rain shower just after noon brought 0.01 inch of precipitation and the dewpoint has risen to 67 degrees early with the arrival of the warm, very humid airmass. TODAY'S OBS... 7/8/2004 THU 8 a.m. overcast with 3 miles visibility and thin fog; temp. 64; dewpoint 63; wind s at 10 mph with 21 mph gust; six hourly low temp. 62 deg. BHO SA 1155 E3 OVC 3F 125/64/63/1809G18/990/ 8/6// 53005 10064 20062 11 a.m. scattered at 1300 cumulus and cumulofractus; estimated overcast base at 4500; visibility 15 miles hazy; 20 miles wnw; temp. 70; dewpoint 64; wind s at 13 mph. BHO SA 1455 13 SCT E45 OVC 15 126/70/64/1811/990/ CUFRA/CU FRMG 13 HND SML BINOVC OVHD HAZY ALQDS VSBY WNW 20/ 8/8// 53001 2 p.m. low overcast and hazy with 15 miles visibility and rain shower to north over Boston with visibility 9 miles to the north; temp. 72; dewpoint 67; wind south at 14 mph; six hourly max. temp. 74 deg; six hourly precip: 0.01 (standard gage) BHO SA 1755 E14 OVC 15 120/72/67/1812/988/ FEW LWR STFRA SE-S DRK NNW-N RW9 N BRGHT SPTS IOVC VSBY N 9 HAZY ALQDS/ 8/5// 58006 MANUAL 6001/ 10074 20064 WEATHER SUMMARY FOR WEDNESDAY JULY 07: TIMES: EASTERN DAYLIGHT TIME TEMPERATURE (DEGREES F) MAX.....78 NORMAL.....80 Hazen shelter: 78.4... @ 3:22 p.m. MIN.....63 NORMAL.....61 Hazen shelter: 62.5... @ 11:59 p.m.* MEAN....71 NORMAL.....71 *EASTERN STANDARD TIME DEPARTURE FROM 30-YEAR NORMAL...... 0 TOTAL DEPARTURE FOR THE MONTH...... - 1 JULY IS AVERAGING 0.3 COOLER THAN NORMAL... PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........23 SSE AT 8:21 p.m. AEROVANE.........27 SSE AT 8:24 p.m. ASOS.............22 S AT 8:26 p.m. DAVIS............24 SSE AT 8:21 p.m. MAXIMUM 2-MINUTE ASOS AVERAGE.......17 S AT 9:23 p.m. OUR FASTEST MILE FOR YESTERDAY......16 MPH SSE AT 9:24 p.m. * *EARLIER OCCURENCES OUR AVERAGE WIND SPEED/DIRECTION.... 7.9 NNE ASOS AVERAGE WIND SPEED............. 8.5 NNE [20 deg ] DAVIS AVERAGE WIND SPEED/DIRECTION.. 7.6 E [100 deg ] PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT) TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.00 DEPARTURE....- 0.12 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.28 DEPARTURE....+1.42 ASOS..............2.31 TOTAL PRECIPITATION FOR THE YEAR..........25.15 DEPARTURE....-1.38 ASOS.............23.57 PRELIMINARY CLIMATE SUMMARY FOR JULY 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 7/1 82/62//72/+2/0.06/T/507/55 29 MPH S TSTM trace of small hail 7/2 83/59/71/+1/0.93/T/575/63 45 MPH W TSTM trace of hail * 7/3 80/59/70/0/0/892/98 21 MPH NNW 7/4 81/59/70/0/0/817/90 23 MPH SSE 7/5 69/63/66/-5/1.29/000/00 33 MPH S 7/6 79/65/72/+1/T/367/40 22 MPH NW 7/7 78/63/71/0/0/.../.. 23 MPH SSE 7/8 ...MORNING LOW 62 DEG. 7/2.. * short period rainfall 0.41 in 3 mins.; 0.50 in 5 mins.; 0.80 in 10 mins. 0.86 in 15 mins.... DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JULY 08 HIGH 95F IN 1981 LOW 50F IN 1919 PRECIP 1.74 INCHES IN 1916 PEAK GUST 46e SSW IN 1941 RECORDS FOR JULY 09 HIGH 98F IN 1912 LOW 47F IN 1909 PRECIP 3.74 INS IN 1921 WIND 46 MPH NW IN 1992 RECORDS FOR JULY 10 HIGH 99F IN 1911 LOW 46F IN 1890 PRECIP 1.68 INS IN 1933 WIND 75 MPH W IN 1985 RECORDS FOR JULY 11 HIGH 98F IN 1911 LOW 49F IN 1890 PRECIP 1.87 INS IN 1959 WIND 53 MPH NW IN 1988 RECORDS FOR JULY 12 HIGH 97F IN 1943 LOW 48F IN 1945 PRECIP 1.43 INS IN 1975 WIND 48e MPH SSW IN 1944 RECORDS FOR JULY 13 HIGH 95F IN 1894 LOW 52F IN 1888, 1895, 1939, 1973 PRECIP 3.54 INS IN 1996 WIND 55 MPH SE IN 1996 TODAY'S REPORT BY: Kim Jeffs/Robert Skilling