BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, AUGUST 23, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Scattered stratocumulus, broken altocumulus Temperature: 63F, Dew point: 55F, Wind: ENE at 10 kts Sea-level pressure: 30.23 inches Hg, falling Visibility: 40 miles 6-hour rainfall: trace 6-hour min temp: 59F BHO SA 1155 40 SCT E75 BKN 40 237/63/55/0710/023/ FEW LWR SC/ 8/530 55002 MANUAL 6000/ 10063 20059 10 A.M. Weather: Overcast stratocumulus, bright spots SE Temperature: 66F, Dew point: 58F, Wind: E at 06 kts Sea-level pressure: 30.25 inches Hg, rising Visibility: 40 miles BHO SA 1455 E26 OVC 40 245/66/58/0906/025/ CIG RGD BRGT SPTS IOVC SE WND LGT AND VRB/ 8/5// 50009 1 P.M. Weather: Overcast stratocumulus, breaks distant NE-E Temperature: 72F, Dew point: 62F, Wind: SE at 09 kts Wind: Variability E-S Sea-level pressure: 30.20 inches Hg, falling Visibility: 35 miles, light haze 6-hour max. temp. 73F BHO SA 1755 E25 OVC 35 227/72/62/1409/020/ CIG RGD BRKS IOVC DSNT NE-E LGT HZ WND 10V17/ 8/5// 58018 10073 20063 WEATHER SUMMARY FOR WEDNESDAY, AUGUST 22 TEMPERATURE (DEGREES F) MAX.....70 NORMAL.....78 MIN.....55 NORMAL.....60 MEAN....63 NORMAL.....69 DEPARTURE FROM 30-YEAR NORMAL.........-6 TOTAL DEPARTURE FOR THE MONTH........- 3 (-0.3 DEGREES/DAY) PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............23 NE AT 10:17 A.M. AEROVANE...............20 NE AT 10:16 A.M. ASOS...................N/A # DAVIS..................21 NE AT 10:16 A.M. FASTEST MILE FOR YESTERDAY................14 NE AT 10:18 A.M. * MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A # MAXIMUM 2-MINUTE DAVIS AVERAGE............14 NE AT 10:17 A.M. AVERAGE WIND SPEED AND DIRECTION..........9.5 NNE ASOS...................N/A # DAVIS..................N/A * 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...trace DEPARTURE.....-0.13 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.62 DEPARTURE.....-2.21 ASOS..............0.55 TOTAL PRECIPITATION FOR THE YEAR..........30.98 DEPARTURE.....-1.26 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/T/.../.. 23 NE Aero 20 MPH NE 8/23 morning low temp. of 59 deg.F; normal low now 60 deg. F 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. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR AUGUST 23 HIGH 88F IN 1918, 1947, 1949, 1996 LOW 45F IN 1923 PRECIP 1.37 INCHES IN 1955 PEAK GUST 60e MPH NW 1940 RECORDS FOR AUGUST 24 HIGH 92F IN 1947 LOW 43F IN 1971 PRECIP 1.92 INCHES IN 1897 PEAK GUST 54 MPH W 1986 TODAY'S REPORT PREPARED By: Stephanie Radner