BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, AUGUST 24, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Overcast stratus, thin fog Temperature: 68F, Dew point: 66F, Wind: S at 17G24 kts Sea-level pressure: 30.06 inches Hg, falling Visibility: 15 miles, 25 miles WNW 6-hour min temp: 66F BHO SA 1155 E10 OVC 15 178/68/66/1817G24/006/ VSBY WNW 25 THN F ALQDS/ 8/6// 58004 10068 20066 10 A.M. Weather: Clear, few cumulus, altocumulus Temperature: 79F, Dew point: 65F, Wind: SSW at 15G24 kts Sea-level pressure: 30.02 inches Hg, falling Visibility: 25 miles BHO SA 1455 CLR 25 165/79/65/2015G24/002/ FEW CU ALQDS FEW AC W-N LGT HZ/ 8/130 56013 1 P.M. Weather: Thin scattered cirrus Temperature: 87F, Dew point: 66F, Wind: S at 19G24 kts Sea-level pressure: 29.97 inches Hg, falling Visibility: 12 miles, hazy 6-hour max. temp. 87F BHO SA 1755 250 –SCT 12 149/87/66/1919G24/997/ HAZY/ 8/001 56016 10087 20068 WEATHER SUMMARY FOR THURSDAY, AUGUST 23 TEMPERATURE (DEGREES F) MAX.....75 NORMAL.....78 MIN.....59 NORMAL.....60 MEAN....67 NORMAL.....69 DEPARTURE FROM 30-YEAR NORMAL.........-2 TOTAL DEPARTURE FOR THE MONTH.........-5 (-0.4 DEGREES/DAY) PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............22 SSE AT 11:56 P.M. * AEROVANE...............20 SSE AT 11:56 P.M. ASOS...................N/A # DAVIS..................UNKNOWN FASTEST MILE FOR YESTERDAY................16 SSE AT 11:56 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A # MAXIMUM 2-MINUTE DAVIS AVERAGE............UNKNOWN AVERAGE WIND SPEED AND DIRECTION..........8.0 ENE 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....0.00 DEPARTURE.....-0.13 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.62 DEPARTURE.....-2.34 ASOS..............0.55 TOTAL PRECIPITATION FOR THE YEAR..........30.98 DEPARTURE.....-1.39 ASOS.............30.22 ** correction: yesterday's summary should have shown a trace of rain for PRECIPITATION 24 HRS ENDING 7 A.M. on 8/22 resulting from a brief shower around 5:00 A.M. EDT. 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/.../.. 23 NE Aero 20 MPH NE 8/23 75/59/67/-2/T/.../.. 22 SSE Aero 20 MPH SSE 8/24 morning low temp. of 66 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 24 HIGH 92F IN 1947 LOW 43F IN 1971 PRECIP 1.92 INCHES IN 1897 PEAK GUST 54 MPH W 1986 RECORDS FOR AUGUST 25 HIGH 93F IN 1947, 1948 LOW 41F IN 1940 PRECIP 1.72 INCHES IN 1958 PEAK GUST 60e MPH SSW 1941 TODAY'S REPORT PREPARED By: Stephanie Radner