BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, OCTOBER 31, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Scattered cirrus/cirrostratus Temperature: 47F, Dew point: 42F, Wind: S at 10 kts Sea-level pressure: 30.39 inches Hg, rising Visibility: 12 miles, light haze 6-hour min temp: 45F 24-hour precipitation: 0.00 inches BHO SA 1155 250 –SCT 12 291/47/42/1810/039/ FEW CS PTCHS GF ALQDS PTCHS SHLW STEAM FG OVR PONDS SE DSSPTNG LGT HZ PARAHELION/ 8/001 53005 10049 20045 10 A.M. Weather: Scattered cumulus, thin scattered cirrus Temperature: 59F, Dew point: 48F, Wind: S at 13G22 kts Sea-level pressure: 30.37 inches Hg, falling Visibility: 15 miles, hazy BHO SA 1455 40 SCT 250 –SCT 15 284/59/48/1713G22/037/ HAZY/ 8/101 58007 1 P.M. Weather: Broken cumulus, overcast cirrostratus Temperature: 60F, Dew point: 47F, Wind: S at 14G21 kts Sea-level pressure: 30.29 inches Hg, falling Visibility: 20 miles, light haze 6 hour max. temp. 62F BHO SA 1755 E35 BKN 220 OVC 20 258/60/47/1714G21/029/ THN SPTS IOVC HIER CLDS VSBL LGT HZ/ 8/107 58026 10062 20047 WEATHER SUMMARY FOR TUESDAY, OCTOBER 30 TEMPERATURE (DEGREES F) MAX.....60 NORMAL.....55 MIN.....37 NORMAL.....39 MEAN....49 NORMAL.....47 DEPARTURE FROM 30-YEAR NORMAL...........+2 TOTAL DEPARTURE FOR THE MONTH.........+191 [+6.2 DEGREES/DAY] PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............25 SW AT 2:20 A.M. * AEROVANE.............24 SW AT 2:19 A.M. ASOS.................23 WSW AT 2:20 A.M. DAVIS................28 SSW AT 1:17 A.M. FASTEST MILE FOR YESTERDAY..............19 SW AT 2:20 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........16 W AT 6:29 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........19 SW AT 1:17 A.M. AVERAGE WIND SPEED AND DIRECTION......10.4 WSW ASOS...............10.0 DAVIS..............11.0 WSW [243 deg] * Last of several occurrences. PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE.....-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.66 DEPARTURE.....-1.61 ASOS..............2.71 TOTAL PRECIPITATION FOR THE YEAR..........35.54 DEPARTURE.....-6.33 ASOS.............34.83 PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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 10/1 67/49/58/+1/0/592/84 18 S 10/2 72/50/61/+5/0/323/46 20 SSE 10/3 73/61/67/+11/0/077/11 23 SSE 10/4 84/65/75/+19/0/425/61 21 SSW 10/5 86/61/74/+19/0/618/89 21 SSW 10/6 83/62/73/+18/0/526/76 23 WSW 10/7 71/52/61/+7/0.01/110/16 29 NNE 10/8 58/52/55/+1/0.49/000/00 21 S 10/9 59/50/55/+1/0.10/580/85 29 NNW 10/10 57/50/54/0/0.08/000/00 20 ESE * 10/11 58/55/57/+4/0.37/000/00 33 ENE TSTM late evening 10/12 62/42/52/-1/0.18/135/20 42 W Aero 43 MPH W 10/13 59/37/48/-4/0/665/99 25 WNW 10/14 59/42/51/-1/0/629/94 32 W 10/15 62/38/50/-2/0/426/64 29 WNW 10/16 61/43/52/+1/0/650/98 25 NW 10/17 68/41/55/+4/0/455/69 20 SW 10/18 75/57/66/+15/0/151/23 21 S 10/19 70/63/67/+16/0.60/000/00 47 SSE Aero 51 MPH SSE 10/20 70/54/62/+12/0.19/229/35 43 W Aero 44 MPH W 10/21 73/51/62/+12/0/643/99 25 SSW 10/22 80/58/69/+19/0/595/92 29 S 10/23 74/58/66/+17/0.02/135/21 52 SSW Aero 55 MPH SSW 10/24 63/50/57/+8/0.10/000/00 24 NW 10/25 54/48/51/+2/0.01/211/33 22 NNE 10/26 58/44/51/+3/0.01/375/59 25 E 10/27 66/52/59/+11/0.50/000/00 43 S Aero 44 MPH S 10/28 55/36/46/-2/0/631/100 39 WNW Aero 42 MPH WNW 10/29 49/30/40/-7/0/629/100 22 WNW 10/30 60/37/49/+2/0/619/99 25 SW 10/31 morning low temp. 45F; normal low is now 39F * 10/10 precipitation corrected from 0.09 to 0.08 inch NEW DAILY RECORDS FOR OCTOBER 2007: 10/4 - RECORD HIGH TEMPERATURE 84F; PREVIOUS 83F IN 1898 and 1959. - EQUALED RECORD HIGH MINIMUM TEMPERATURE OF 65F; ALSO IN 1927. 10/5 - RECORD HIGH TEMPERATURE 86F; PREVIOUS 85F IN 1922 10/6 - EQUALED RECORD HIGH TEMPERATURE 83F; ALSO IN 1990. 10/19- EQUALED RECORD HIGH MINIMUM TEMPERATURE 63F; PREVIOUS IN 1928. 10/23 -EQUALED RECORD HIGH MINIMUM TEMPERATURE 58F; ALSO IN 1942 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 31 HIGH 79 IN 1946 LOW 22 IN 1904 PRECIP 3.74 INCHES IN 1991 SNOWFALL TRACE IN 1906 PEAK GUST 70e S IN 1945 RECORDS FOR NOVEMBER 1 HIGH 75 IN 2003 LOW 22 IN 1913,1923 PRECIP 2.93 INCHES IN 1985 SNOWFALL TRACE IN 1906,1951 PEAK GUST 78 ESE IN 1997 TODAY'S REPORT PREPARED By: Stephanie Radner