BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JULY 23, 2005 ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted] SUNNY, WARM AND DRIER WEATHER TODAY...FRIDAY EVENING THUNDERSTORMS BRING ONLY A TRACE OF RAIN...JULY NOW WARMER THAN NORMAL... Passing thunderstorms brought heavy downpours to surrounding areas on Friday evening ahead of a cold front, but only a trace of rain occurred at the Observatory between 10:20 and 10:25 PM EDT on Friday evening. A peak gust to 28 mph NNW occurred at 10:23 PM EDT. The mean temperature of 80 on Friday and departure of +8 raised the monthly temperature departure to +7 through Friday, turning the month into the warmer than normal category. Much drier air has briefly moved into New England today, dropping the dew point to the lower 50s this afternoon under small fair weather cumulus and a mostly sunny sky. Today's observations: 7 A.M. EST Weather: Sky clear a few distant cirrus and cumulus fractus Temperature: 69F, Dew point: 62F, Wind: NW 12 mph Sea-level pressure: 29.94 inches, rising Visibility: 25 miles, hazy BHO SA 1155 CLR 25 140/69/62/3110/994/ HAZY FEW CI DSNT ESE FEW CUFRA DSNT W/ 8/101 53010 10069 20064 10 A.M. EST Weather: Scattered cumulus Temperature: 77F, Dew point: 59F, Wind: WNW 9 mph Sea-level pressure: 29.97 inches, rising Visibility: 50 miles BHO SA 1455 35 SCT 50 150/77/59/3008/997/ CU FRMG ALQDS WND LGT AND VRB/ 8/100 52010 1 P.M. EST Weather: Scattered cumulus Temperature: 80F, Dew point: 51F, Wind: NW 12 mph Sea-level pressure: 29.95 inches, falling Visibility: 50 miles BHO SA 1755 45 SCT 55 SCT 50 143/80/51/3110/995/ WND 28V34/ 8/100 58007 10081 20069 WEATHER SUMMARY FOR FRIDAY, JULY 22 TEMPERATURE (DEGREES F) MAX.....91 NORMAL.....82 ASOS.....90 AT 3:25 P.M. MIN.....68 NORMAL.....63 ASOS.....67 AT MIDNIGHT P.M. MEAN....80 NORMAL.....72 DEPARTURE FROM 30-YEAR NORMAL......+8 TOTAL DEPARTURE FOR THE MONTH......+7 (+0.1 DEGREE/DAY) PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.........28 NNW AT 9:23 P.M. AEROVANE..........31 NNW AT 9:23 P.M. ASOS..............26 NNW AT 9:24 P.M. DAVIS.............27 NNW AT 9:24 P.M. FASTEST MILE FOR YESTERDAY...........21 NNW AT 9:24 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE........22 NNW AT 9:25 P.M. AVERAGE WIND SPEED AND DIRECTION....8.8 W ASOS.............8.0 PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...TRACE DEPARTURE....-0.12 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.72 DEPARTURE....+0.06 ASOS..............2.72 TOTAL PRECIPITATION FOR THE YEAR..........33.53 DEPARTURE....+5.35 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/.../000/00 39 NNE 7/9 76/54/65/-6/.../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/.../.. 17 WNW 7/22 91/69/80/+8/T/.../.. 28 NNW AERO 31 MPH NNW TSTM 7/23 ..overnight low 64 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JULY 23 HIGH 99F IN 1952 LOW 51F IN 1923,1977 PRECIP 1.82 INCHES IN 1953 PEAK GUST 54e MPH S IN 1946 RECORDS FOR JULY 24 HIGH 96F IN 1987 LOW 49F IN 1893,1912 PRECIP 2.21 INCHES IN 1988 PEAK GUST 41 MPH S IN 1975, 41e MPH WSW 1977 TODAY'S REPORT BY: Mike Iacono