BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA ALL TIMES EASTERN DAYLIGHT TIME TUESDAY, AUGUST 2, 2005 BRILLIANT LIGHTNING DISPLAY ACCOMPANIES LAST NIGHT'S THUNDERSTORM WHILE DOWNPOUR BRINGS AROUND 0.70 IN LESS THAN 15 MINUTES Thunder began around midnight and a brilliant nearly continuous lightning display from cloud to cloud and cloud to ground occurred between about 12:05 a.m. and 1:15 a.m. EDT. ASOS reported a peak minute rainfall rate of 0.07 and 0.08 in. per minute for a couple of minutes just past 12:40 a.m. A power failure occurred and we went on generator at 12:55 a.m. A peak gust to 36 MPH WNW was recorded by Aerovane at 12:50 a.m. while ASOS had 31 MPH W at 12:52 a.m. and 420C had 32 MPH WNW at 12:50 a.m. The final rainfall total for the standard gage for this event was 0.75 inch and 0.63 inch for ASOS. The power glitch caused a fairly large error for the ASOS system. JULY 2005 STATS... Mean temp: 71.8 [+0.2 ] High: 94/27th Low: 53/8th HDD = 16 [+ 7] CDD = 231 [ +16 ] Rainfall: 2.72 [-1.02 ] Sunshine: 16884 mins. or 281.4 hours or 61% [+4 ] Peak gust Aero: 42 MPH S [25TH][420c 39 MPH NNE on 8th] Prevailing wind: S 18% TODAY'S OBSERVATIONS...... 8 A.M. clear with 4 miles in light fog; temp. 69; dewpoint 67; wind west at 09 mph; six hourly min. temp. 65; 24 hourly precip. 0.75 inch BHO SA 1155 CLR 4F 154/69/67/2708/999/ CI SE-SSW/ 8/001 53010 MANUAL 70075 ASOS 70065 10069 20065 11 A.M. scattered clouds with 12 miles and hazy; temp. 79; dewpoint 68; wind wnw at 07 mph BHO SA 1455 40 SCT 12 156/79/68/3006/999/ CU/FEW MDT CU FRMG HAZY/ 8/200 53002 WEATHER SUMMARY FOR MONDAY, AUGUST 1: TEMPERATURE (DEGREES F) MAX.....85 NORMAL.....81 MAX. 84.6 @ 3:56 p.m. MIN.....62 NORMAL.....63 MIN. 62.0 @ 4:16 a.m. MEAN....74 NORMAL.....72 DEPARTURE FROM 30-YEAR NORMAL.....+ 2 TOTAL DEPARTURE FOR THE MONTH.....+ 2 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........32 WNW AT 11:50 P.M. ** AEROVANE.......................... 36 WNW AT 11:50 P.M. ** ASOS................................... 31 W AT 11:52 P.M. ** DAVIS....................................N/A ** Eastern Standard Time....... FASTEST MILE FOR YESTERDAY........... 24 WNW AT 11:43 P.M. ** MAXIMUM 2-MINUTE ASOS AVERAGE..... N/A MAXIMUM 1-MINUTE DAVIS AVERAGE..... N/A ** Eastern Standard Time... AVERAGE WIND SPEED AND DIRECTION... ASOS........................................................ 10.6 DAVIS....................................................... N/A PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT) TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.75 DEPARTURE....+0.63 ASOS.............. 0.64 TOTAL PRECIPITATION FOR JULY...............2.72 DEPARTURE....-1.02 ASOS..............2.72 TOTAL PRECIPITATION FOR THE YEAR..........34.28 DEPARTURE....+4.29 ASOS.............33.04* *EXCLUDES 3.19 INCHES OF ERRONEOUS PRECIPITATION RECORDED FROM 1/23-1/28. PRELIMINARY CLIMATE SUMMARY FOR JULY 2005......CALENDAR DAY DATA DATA REPORTED: DATE MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 7/1 75/60/68/-2/0.02/110/12 20 SSW 7/2 80/62/71/+1/0/776/85 24 W 7/3 77/59/68/-2/0/885/97 18 ENE 7/4 81/58/70/0/0/701/77 22 SSE 7/5 86/60/73/+2/0/783/86 27 S 7/6 71/57/64/-7/*1.43/000/00 35 NNE Aero 38 MPH NNE 7/7 62*/56/59/-12/T/000/00 30 NE 7/8 59*/53/56/-15/1.02/000/00 39 NNE 7/9 76/54/65/-6/0.09/335/37 35 W TSTM 7/10 86/62/74/+3/0/787/87 32 WNW 7/11 88/66/77/+5/0/822/91 30 NW 7/12 76/60/68/-4/0/849/94 21 NE 7/13 77/59/68/-4/0/649/72 27 S 7/14 84/64/74/+2/0/0/648/72 27 SW 7/15 82/67/75/+3/0/681/76 21 NE 7/16 86/66/76/+4/0/600/67 25 S 7/17 82/67/75/+3/0/0/072/08 27 SSE 7/18 83/72/78/+6/0.15/143/16 23 S (sunshine mins. corrected) 7/19 91/72*/82/+10/0.01/508/57 25 W TSTM 7/20 88/70/79/+7/0/863/97 23 W 7/21 86/68/77/+5/0/629/70 17 WNW 7/22 91/68/80/+8/T/807/91 28 NNW TSTM 7/23 82/64/73/+1/0/876/99 28 WNW (sunshine mins. corrected) 7/24 81/60/71/-2/0/865/98 24 NW (sunshine mins. corrected) 7/25 81/65/73/0/0/370/42 38 S Aero 42 MPH S 7/26 93/69/81/+9/0/782/89 27 S 7/27 94/67/81/+9/T/728/83 33 S 7/28 72/60/66/-6/0/473/54 24 NE 7/29 81/60/71/-1/0/567/65 29 WSW 7/30 78/63/71/-1/0/453/52 17 NE 7/31 70/62/66/-6/T/122/14 18 NE 8/1 85/62/74/+2/0.72/.../.. 32 WMW Aero 36 MPH WNW TSTM 8/2 morning low temp. 65 deg. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR AUGUST 2 HIGH 101F IN 1975 [STATION RECORD MAXIMUM - Tied with 8/10/1949] LOW 50 IN 1929, 1947 PRECIP 1.59 INCHES IN 1946 PEAK GUST 45e MPH NW IN 1946 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 TODAY'S REPORT BY: Robert Skilling