BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, AUGUST 31, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Scattered stratocumulus, cirrus Temperature: 68F, Dew point: 60F, Wind: N at 07 kts Sea-level pressure: 29.98 inches Hg, rising Visibility: 8 miles, hazy 6-hour min temp: 66F 24-hour rainfall: 0.00 BHO SA 1155 E30 BKN 250 BKN 8 151/68/60/3507/998/ HAZY/ 8/501 50003 10068 20065 10 A.M. Weather: Scattered cirrus, few distant stratocumulus NE-S Temperature: 77F, Dew point: 62F, Wind: NE at 09 kts Wind: variability N-ESE Sea-level pressure: 29.96 inches Hg, falling Visibility: 12 miles, hazy BHO SA 1455 250 SCT 12 145/77/62/0409/996/ FEW SC DSNT NE-S PTCHS DNS CI NW-NE DRK K LYR SW-NNE HAZY WND 35V10/ 8/502 56003 1 P.M. Weather: Scattered stratocumulus, cirrus Temperature: 75F, Dew point: 62F, Wind: NNE at 13 kts Wind: variability N-ESE Sea-level pressure: 29.94 inches Hg, falling Visibility: 12 miles, hazy 6-hour max. temp: 78 deg. F BHO SA 1755 35 SCT 250 SCT 12 140/75/62/0313/994/ MDT CU FRMG SSW-N FEW SCSL N-NE PTCHS DNS CI NE-SE HAZY WND 35V10/ 8/202 58005 10078 20068 WEATHER SUMMARY FOR THURSDAY, AUGUST 30 TEMPERATURE (DEGREES F) MAX.....89 NORMAL.....76 MIN.....65 NORMAL.....58 MEAN....77 NORMAL.....67 DEPARTURE FROM 30-YEAR NORMAL........+10 TOTAL DEPARTURE FOR THE MONTH........+53 (+1.6 DEGREES/DAY) PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............23 S AT 3:31 P.M. AEROVANE...............20 SSE AT 11:01 A.M. ASOS...................N/A # DAVIS..................24 S AT 3:31 P.M. FASTEST MILE FOR YESTERDAY................15 SSE AT 4:43 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A # MAXIMUM 2-MINUTE DAVIS AVERAGE............18 SSW AT 1:59 A.M. AVERAGE WIND SPEED AND DIRECTION..........10.6 SSW ASOS...................N/A # DAVIS..................11.3 S [188 deg] * last of several occurrences.. # ASOS WINDS SWITCHED OFF BY NWS 6/6, IT IS NOT KNOWN WHEN THAT DATA WILL RESUME PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE.....-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.62 DEPARTURE.....-3.30 ASOS..............0.55 TOTAL PRECIPITATION FOR THE YEAR..........30.98 DEPARTURE.....-2.35 ASOS.............30.22 PRELIMINARY CLIMATE SUMMARY FOR AUGUST 2007......CALENDAR DAY DATA DATA REPORTED: 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 8/1 84/67/76/+4/0/851/98 20 NNE 8/2 92/68/80/+8/0/823/95 21 S 8/3 92/70/81/+9/0/760/88 28 SSW 8/4 89/71/80/+8/0/827/96 29 WSW 8/5 80/62/71/-1/0/842/98 23 SSE 8/6 77/61/69/-3/0.05/129/15 36 SSE Aero 34 MPH SSE TSTM 8/7 82/67/75/+4/0.12/410/48 15 SSE 8/8 88/70/79/+8/0.10/349/41 36 S 8/9 75/60/68/-3/0/722/85 32 NW 8/10 63/53/58/-13/0.19/017/02 16 SSW 8/11 83/52/68/-3/0/743/88 21 WNW 8/12 86/64/75/+4/0/665/79 21 SSW 8/13 83/64/74/+3/0.01/260/31 30 NW TSTM 8/14 78/58/68/-2/0/812/97 23 NW 8/15 83/59/71/+1/0/651/78 36 SSW Aero 34 MPH SSW 8/16 87/67/77/+7/0/641/77 33 SSW 8/17 78/62/70/0/0.07/241/29 43 S Aero 39 MPH S TSTM 8/18 71/52/62/-8/0.08/761/92 46 WNW Aero 42 MPH WNW, Davis 46 MPH WNW TSTM 8/19 74/51/63/-7/0/619/75 25 WNW 8/20 70/56/63/-6/0/411/50 21 ENE 8/21 68/56/62/-7/0/271/33 23 E 8/22 70/55/63/-6/0/147/18 23 NE 8/23 75/59/67/-2/T/024/03 22 SSE 8/24 88/66/77/+8/0/552/68 30 SSW 8/25 93/69/81/+13/0/566/70 25 SSE 8/26 84/68/76/+8/T/169/21 22 S 8/27 79/64/72/+4/0/731/91 25 NNE 8/28 83/64/74/+6/0/736/92 21 ESE 8/29 88/64/76/+9/0/782/98 24 SSE Aero 21 MPH SSE 8/30 89/65/77/+10/0/.../.. 23 S Aero 20 MPH SSE 8/31 morning low temp. 65F; normal low now 58F NEW DAILY RECORDS FOR AUGUST 2007: 8/18 - NEW RECORD PEAK GUST FOR OF 46 MPH WNW; the previous record was 39 MPH SW in 1991 8/25 - RECORD HIGH TEMPERATURE OF 93F; ties previous record set in 1947,1948 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR AUGUST 31 HIGH 94F IN 1953 LOW 42F IN 1976 PRECIP 2.46 INCHES IN 1954 PEAK GUST 125 MPH SE 1954 [CAROL - RECORD FOR MONTH] RECORDS FOR SEPTEMBER 1 HIGH 93F IN 1969 LOW 47F IN 1975 PRECIP 1.60 INCHES IN 1927 PEAK GUST 59e MPH S IN 1945, SSW IN 1965 TODAY'S REPORT PREPARED By: Stephanie Radner