BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY CLIMATE SUMMARY WEDNESDAY, JULY 21, 2004 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] TODAY'S MANUAL OBSERVATIONS.... 7/21/2004 WED 8 a.m. clear skies with 9 miles visibility; temp. 69; dewpoint 62; wind nnw at 9 mph; a few cirrus overhead with thin fog below inversion; hazy; visibility higher above inversion; 6-hr max. temp. 69; 6-hr min. temp. 66 BHO SA 1155 CLR 9 150/69/62/3308/997/ FEW CI OVHD THN FH VSBY HIER ABV INVSN/ 8/001 53012 10069 20066 11 a.m. clear skies with 10 miles visibility; temp. 79; dewpoint 63; wind estimated ne at 2 mph; lone cumulus over the city to the north; hazy; winds light and variable BHO SA 1455 CLR 10 154/79/63/E0501/998/ LONE CU OVR CTY N HZY WND LGT VBL/ 8/100 53004 2 p.m. scattered at 5000; 10 miles visibility; temp. 83; dewpoint 61; wind wsw at 5 mph; a few moderate cumulus and hazy; 6-hr max temp. 84; 6-hr min. temp. 69 BHO SA 1755 50 SCT 10 141/83/61/2504/995/ FEW MDT CU HAZY/ 8/200 58013 10084 20069 WEATHER SUMMARY FOR TUESDAY, JULY 20: TEMPERATURE (DEGREES F) MAX.....84 NORMAL.....82 HAZEN MAXIMUM: 84.2 @ 2:21 p.m. MIN.....67 NORMAL.....63 HAZEN MINIMUM: 66.7 @ 5:15 a.m. MEAN....76 NORMAL.....72 DEPARTURE FROM 30-YEAR NORMAL.........+ 4 TOTAL DEPARTURE FOR THE MONTH.........-36 WE ARE AVERAGING 2.0 DEGREES COOLER FOR THE MONTH OF JULY PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.........22 WSW AT 12:47 p.m. AEROVANE..........23 WSW AT 5:58 p.m. ASOS..............20 WSW AT 5:58 p.m. DAVIS.............20 W AT 12:48 p.m. ASOS 2-MINUTE.....16 W AT 6:11 p.m. FASTEST MILE......16 WSW AT 5:58 p.m. OUR AVERAGE.......8.1 MPH WSW ASOS AVERAGE......8.4 MPH SW [230 DEG.] DAVIS AVERAGE.....8.0 MPH WSW [240 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..........3.20 DEPARTURE....+0.78 ASOS..............3.23 TOTAL PRECIPITATION FOR THE YEAR..........26.07 DEPARTURE....-2.02 ASOS.............24.47 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/503/55 29 MPH S TSTM trace/sml hail 7/2 83/59/71/+1/0.93/T/575/63 45 MPH W TSTM trace of hail * 7/3 80/59/70/0/0/894/98 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/364/40 22 MPH NW 7/7 78/63/71/0/0/690/76 23 MPH SSE 7/8 75/62/69/-2/0.01/045/05/ 24 MPH S 7/9 75/62/69/-2/0/535/59 25 MPH S 7/10 80/59/70/-1/0/842/93 21 MPH NW 7/11 74/60/67/-5/0/713/79 20 MPH N 7/12 76/59/68/-4/0/189/21 24 MPH S 7/13 64/60/62/-10/0.51/000/00 28 MPH ENE 7/14 63/59/61/-11/0.18/000/00 27 MPH NNE 7/15 77/60/69/-3/0/395/44 29 MPH S AERO 33 MPH S 7/16 79/62/71/-1/0/600/67 30 MPH SW AERO 33 MPH SSW 7/17 84/63/74/+2/0/751/84 23 MPH WSW 7/18 82/66/74/+2/T/367/41 22 MPH ESE 7/19 72/64/68/-4/0.13/9/1 22 MPH NNE 7/20 84/67/76/+4/0/.../.. 22 MPH WSW 7/21 ...EARLY MORNING LOW 66 VERY HEAVY RAINFALL EVENT ON JULY 2ND..... 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 21 HIGH 100F IN 1977 [RECORD FOR MONTH] LOW 48F IN 1890 PRECIP 2.09 INCHES IN 1938 PEAK GUST 60e MPH WNW IN 1977 RECORDS FOR JULY 22 HIGH 99F IN 1926 LOW 52F IN 1890 PRECIP 1.73 INCHES IN 1900 PEAK GUST 55 MPH IN 1983 TODAY'S REPORT BY: kim jeffs/robert skilling