BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JULY 26, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED PARTLY SUNNY, WARM AND DRIER CONDITIONS TODAY WITH LOWER DEW POINT TEMPERATURES... The dew point has continued to drop from yesterday's readings in the middle 60s to the upper 50s today making it feel more confortable today. The high temperature so far has reached the middle 80s after a morning low of 65. Thursday's thunderstorm day was the eighth of the month, but the record for July is 15 thunderstorm days in 1988. The total thunderstorm days for June-July is up to 17 with the year-to-date total now up to 25. This is the most thunderstorm days for these periods since 1988 when there were 20 in June-July and 27 for the year through July. Today's observations: 8 A.M. EDT Weather: Scattered altocumulus, hazy Temperature: 70F, Dew point: 61F, Wind: SW at 6 kts Sea-level pressure: 30.06 inches Hg, rising Visibility: 25 miles, hazy 6-hourly minimum temperature: 65F 24-hourly rainfall: 0.00 in. BHO SA 1155 75 SCT 25 180/70/61/2206/006/ HAZY WND LGT/ 8/030 51003 10070 20065 11 A.M. EDT Weather: Scattered cumulus, few altocumulus, hazy Temperature: 81F, Dew point: 58F, Wind: SW at 7 kts Wind: Light and variable Sea-level pressure: 30.02 inches Hg, falling Visibility: 25 miles, hazy BHO SA 1455 50 SCT 25 166/81/58/2107/002/ FEW AC DSNT E-SE FEW CUFRA HAZY WND LGT AND VRB/ 8/130 56014 2 P.M. EDT Weather: Scattered cumulus, scattered cirrus, few moderate cumulus, hazy Temperature: 84F, Dew point: 56F, Wind: SSW at 7 kts Wind: Light and variable Sea-level pressure: 29.95 inches Hg, falling Visibility: 30 miles, hazy 6-hour max. temp. 85F BHO SA 1755 65 SCT 250 SCT 30 142/84/56/2007/995/ FEW MDT CU HAZY WND LGT AND VRB/ 8/201 58024 10085 20070 WEATHER SUMMARY FOR FRIDAY, JULY 25 TEMPERATURE (DEGREES F) MAX.....82 NORMAL.....82 MIN.....65 NORMAL.....63 MEAN....74 NORMAL.....73 DEPARTURE FROM 30-YEAR NORMAL.............+1 TOTAL DEPARTURE FOR THE MONTH............+71 [+2.6 DEGREES/DAY] PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............23 SSE AT 12:18 A.M. AEROVANE.............22 SSE AT 12:20 A.M. ASOS.................22 S AT 12:20 A.M. DAVIS................N/A FASTEST MILE FOR YESTERDAY..............16 S AT 12:18 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........16 S AT 12:27 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........N/A AVERAGE.............8.0 W ASOS................6.8 DAVIS...............7.2 S [191 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE......-0.12 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........5.19 DEPARTURE......+2.17 ASOS..............5.31 TOTAL PRECIPITATION FOR THE YEAR..........30.19 DEPARTURE......+1.50 ASOS.............32.69 # # 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 84/65/74/+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/.../.. 43 S TSTM Aero 47 MPH S 7/25 82/65/74/+1/0/.../.. 23 SSE 7/26 our morning low temp. 65F; the normal low is 63F 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 JULY 26 HIGH 97F IN 1963 LOW 47F IN 1920 PRECIP 2.05 INS IN 1899 WIND 74e MPH NNW IN 1940 RECORDS FOR JULY 27 HIGH 95F IN 1949, 1963 LOW 50F IN 1920, 2001 PRE 4.01 INS IN 1979 WIND 47 MPH ENE IN 1984 TODAY'S REPORT PREPARED By: Mike Iacono