BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JULY 30, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] PARTLY SUNNY AND COOL WEATHER TODAY... JULY SLIGHTLY WARMER AND DRIER THAN NORMAL... A distinct band a cirrostratus associated with an old front offshore covered much of the sky this morning, and this has gradually moved to the southeast during the day. The air has also become somewhat drier this afternoon with the dew point dropping into the mid-50s. The temperature departure for the month stands at +17 degrees, or barely 0.5 degree above normal per day. Rainfall for July of 2.72 inches is less than one inch below normal. The highest wind gust for the month of 39 mph, NNE on the 8th occurred during the offshore passage of the extra-tropical remnants of Tropical Storm Cindy. Today's observations: 7 A.M. EST Weather: Broken cirrostratus and scattered altocumulus Temperature: 67F, Dew point: 61F, Wind: N 8 mph Sea-level pressure: 30.24 inches, rising Visibility: 15 miles, hazy BHO SA 1155 150 SCT 200 BKN 15 239/67/61/3507/024/ CLRNG LINE WSW-NE FEW CI NW-N SUN DMLY VSBL HAZY WND LGT WND GRDLY VEERING/ 8/078 53014 10069 20065 10 A.M. EST Weather: Broken cirrostratus and scattered altocumulus Temperature: 71F, Dew point: 59F, Wind: NNW 9 mph Sea-level pressure: 30.28 inches, rising Visibility: 25 miles, hazy BHO SA 1455 150 SCT 200 BKN 25 253/71/59/0208/028/ CLRNG LINE WSW-NE CI WSW-N FEW CU DSNT NW-N SUN DMLY VSBL HAZY WND LGT/ 8/178 51014 1 P.M. EST Weather: Scattered cirrostratus and broken cirrus, few cumulus Temperature: 74F, Dew point: 54F, Wind: NE 10 mph Sea-level pressure: 30.27 inches, falling Visibility: 40 miles BHO SA 1755 200 SCT 250 -BKN 40 250/74/54/0409/027/ CU DSNT SE-N WND 01V07/ 8/101 55003 10074 20067 WEATHER SUMMARY FOR FRIDAY, JULY 29 TEMPERATURE (DEGREES F) MAX.....81 NORMAL.....82 ASOS.....81 AT 4:15 P.M. MIN.....60 NORMAL.....63 ASOS.....59 AT 3:01 A.M. MEAN....71 NORMAL.....72 DEPARTURE FROM 30-YEAR NORMAL......-1 TOTAL DEPARTURE FOR THE MONTH.....+17 (+0.4 DEGREE/DAY) PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.........29 WSW AT 2:14 P.M. AEROVANE..........30 WSW AT 2:14 P.M. ASOS..............28 W AT 2:15 P.M. DAVIS.............29 WSW AT 1:53 P.M. FASTEST MILE FOR YESTERDAY...........21 W AT 12:20 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE........21 WSW AT 12:59 P.M. AVERAGE WIND SPEED AND DIRECTION...10.5 WSW ASOS............10.8 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE....-0.12 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.72 DEPARTURE....-0.78 ASOS..............2.72 TOTAL PRECIPITATION FOR THE YEAR..........33.53 DEPARTURE....+4.51 ASOS.............32.40* *EXCLUDES 3.19 INCHES OF ERRONEOUS PRECIPITATION RECORDED FROM 1/23-1/28. PRELIMINARY CLIMATE SUMMARY FOR JULY 2005......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 7/1 75/60/68/-2/0.02/110/12 20 SSW (MPH) 7/2 80/62/71/+1/0/776/85 24 W 7/3 77/59/68/-2/0/885/97 18 ENE 7/4 81/58/70/0/0/701/77 22 SSE 7/5 86/60/73/+2/0/783/86 27 S 7/6 71/57/64/-7/1.43/000/00 35 NNE Aero 38 MPH NNE 7/7 62/56/59/-12/T/000/00 30 NE 7/8 59/53/56/-15/1.02/000/00 39 NNE 7/9 76/54/65/-6/0.09/335/37 35 W 7/10 86/62/74/+3/0/787/77 32 WNW 7/11 88/66/77/+5/0/822/91 30 NW 7/12 76/60/68/-4/0/849/94 21 NE 7/13 77/59/68/-4/0/649/72 27 S 7/14 84/64/74/+2/0/0/648/72 27 SW 7/15 82/67/75/+3/0/681/76 21 NE 7/16 86/66/76/+4/0/600/67 25 S 7/17 82/67/75/+3/0/0/072/08 27 SSE 7/18 83/72/78/+6/0.15/142/16 23 S 7/19 91/72*/82/+10/0.01/508/57 25 W TSTM 7/20 88/70/79/+7/0/863/97 23 W 7/21 86/68/77/+5/0/629/70 17 WNW 7/22 91/68/80/+8/T/807/91 28 NNW TSTM 7/23 82/64/73/+1/0/865/99 28 WNW 7/24 81/60/71/-2/0/856/98 24 NW 7/25 81/65/73/0/0/370/42 38 S Aero 42 MPH S 7/26 93/69/81/+9/0/.../.. 27 S 7/27 94/67/81/+9/T/.../.. 33 S 7/28 72/60/66/-6/0/.../.. 24 NE 7/29 81/60/71/-1/0/.../.. 29 WSW 7/30 ..overnight low 65 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JULY 30 HIGH 99F IN 1949 LOW 51F IN 1956 PRECIP 1.84 INCHES IN 1976 PEAK GUST 70e MPH SW 1944 RECORDS FOR JULY 31 HIGH 95F IN 1917 LOW 50F IN 1895,1918 PRECIP 1.34 INCHES IN 1892 PEAK GUST 43e MPH WNW IN 1953, 43 SW IN 1971 TODAY'S REPORT BY: Mike Iacono