BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, AUGUST 3, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED Today's observations: 8 A.M. EDT Weather: Obscurred by fog Temperature: 66F, Dew point: 66F, Wind: WNW at 5 kt Sea-level pressure: 29.76 inches Hg, rising Visibility: 1/16 of a mile 6-hourly minimum temperature: 64F 24-hourly rainfall: 0.80 inches, thunderstorm BHO SA 1155 W2 X1 1/16F 077/66/66/2905/976/ WND LGT/ 8//// 51014 70080 10066 20064 11 A.M. EDT Weather: Broken cumulus congestus Temperature: 72F, Dew point: 64F, Wind: W at 8 kt Sea-level pressure: 29.76 inches Hg, rising Visibility: 35 miles BHO SA 1455 20 BKN 35 079/72/64/2708/976/ 8/200 53002 2 P.M. EDT Weather: Broken cumulus congestus with towering cumulus Temperature: 79F, Dew point: 61F, Wind: WSW at 10G14 kt Sea-level pressure: 29.74 inches Hg, falling Visibility: 40 miles 6-hour max. temp. 80F BHO SA 1755 25 BKN 40 071/79/61/2410G14/974/ TCU N-NE/ 8/200 58008 10080 20066 WEATHER SUMMARY FOR SATURDAY, AUGUST 2 TEMPERATURE (DEGREES F) MAX.....80 NORMAL.....81 MIN.....65 NORMAL.....63 MEAN....73 NORMAL.....72 DEPARTURE FROM 30-YEAR NORMAL.............+1 TOTAL DEPARTURE FOR THE MONTH.............+5 [+2.3 DEGREES/DAY] PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............21 NW AT 3:12 P.M. AEROVANE.............22 NW AT 3:12 P.M. ASOS.................20 N AT 3:12 P.M. DAVIS................22 SSW AT 7:34 P.M. FASTEST MILE FOR YESTERDAY..............16 NW AT 3:12 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........16 N AT 3:09 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........18 SSW AT 7:35 P.M. AVERAGE.............6.7 NW ASOS................5.7 DAVIS...............7.0 NE [46 deg] * Last of several occurrences... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.80 DEPARTURE......+0.68 ASOS..............0.84 TOTAL PRECIPITATION FOR THE MONTH..........0.80 DEPARTURE......+0.56 ASOS..............0.84 TOTAL PRECIPITATION FOR THE YEAR..........31.73 DEPARTURE......+2.08 ASOS.............34.23 # # Includes erroneous ASOS precipitation data on 2/13/08. PRELIMINARY CLIMATE SUMMARY FOR JULY 2008 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 7/1 83/66/75/+5/0.15/411/45 28 SSW TSTM 7/2 84/61/73/+3/1.02/593/65 44 W TSTM Small hail 7/3 85/63/74/+4/T/793/87 45 SW Aero 44 MPH SW 7/4 69/59/64/-6/0.22/018/02 25 NE 7/5 70/62/66/-5/0.01/000/00 17 E 7/6 81/65/73/+2/0/245/27 20 S 7/7 86/67/77/+6/0/563/62 21 S 7/8 89/69/79/+8/0/753/83 30 SSE 7/9 88/70/79/+8/T/734/81 36 SSW TSTM Aero 35 MPH SSW 7/10 82/65/74/+3/T/887/98 28 W Aero 29 MPH W 7/11 83/61/72/0/0/759/84 17 NW 7/12 82/65/74/+2/0/631/70 28 S 7/13 81/66/74/+2/0/784/87 38 S Aero 40 MPH S 7/14 80/67/74/+2/0.36/468/52 23 W TSTM 7/15 87/67/77/+5/0/799/89 22 SSW 7/16 88/66/77/+5/0/869/97 22 SSE 7/17 86/68/77/+5/0/805/90 20 SW 7/18 91/66/79/+7/0.03/679/76 23 SE TSTM 7/19 93/66/80/+8/T/589/66 35 WSW Aero 35 WSW 7/20 88/71/80/+8/0.18/178/20 27 NNW TSTM 7/21 84/65/75/+3/0.07/480/54 * 25 NNE 7/22 78/63/71/-1/0.13/496/56 21 WSW 7/23 70/63/67/-5/0.75/0/0 28 NE TSTM 7/24 81/67/74/+1/2.27/044/05 43 S TSTM Aero 47 MPH S 7/25 82/65/74/+1/0/670/76 23 SSE 7/26 85/65/75/+3/0/800/91 30 S 7/27 78/61/70/-2/0.66/149/17 43 WSW Aero 44 MPH WSW TSTM 7/28 83/61/72/0/0/770/88 23 WSW 7/29 84/66/75/+3/0/777/89 24 W 7/30 84/65/75/+3/0/583/67 21 SW 7/31 86/67/77/+5/0.08/469/54 * 22 SSE * 21st: Mean temperature corrected from 74 to 75 * 31st: Sunshine minutes corrected from 243 to 469 PRELIMINARY CLIMATE SUMMARY FOR AUGUST 2008 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 8/1 85/66/76/+4/0.00/.../.. 16 WSW 8/2 80/65/73/+1/0.80/.../.. 21 NW TSTM NEW DAILY RECORDS FOR JULY 7/24 - PEAK GUST OF 43 MPH FROM THE SOUTH IS NEW REOCRD FOR THE DATE; PREVIOUS RECORD 41 MPH S IN 1975, 41e MPH WSW IN 1977 7/24 - DAILY PRECIPITATION 2.27 INCHES IS NEW RECORD FOR THE DATE; PREVIOUS RECORD WAS 2.21 INCHES IN 1988 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR AUGUST 3 HIGH 96F IN 1930 LOW 50F IN 1976 PRECIP 1.45 INCHES IN 1979 PEAK GUST 41 MPH NE IN 1964 RECORDS FOR AUGUST 4 HIGH 95F IN 1928 LOW 48F IN 1900 PRECIP 1.68 INCHES IN 1983 PEAK GUST 48 MPH SW IN 1974 TODAY'S REPORT PREPARED By: Andrew Hoell