BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY CLIMATE SUMMARY THURSDAY, JULY 15, 2004 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] TODAY'S DISUSSION AT 2 P.M. THIS MONTH ALMOST 3 DEGREES COOLER THAN NORMAL NOW OUR COOLEST JULY ONLY SINCE 2000! YESTERDAY'S MAXIMUM TEMPERATURE OF 63 DEGREES WAS CLOSE TO RECORD LOW MAX. FOR 7/14... Our mean temperature over the past two days has averaged 10 and 11 degrees cooler than normal, unusual for the month of July. The last time we had just one day average that far below normal was in July, 2001, with a -11 degrees. However, in the very cool July, 2000, there were four days averaging 10 and 11 degrees cooler than normal and the entire month ending up 3.3 degrees cooler than normal. Temperatures are finally rising closer to mid-summer normals today as the sun breaks out early this afternoon. The high temperature of 63 for yesterday, July 14th, was within one degree of the record low maximum for the date of 62 degrees in 1937. Our final precipitation total for July 13-14, was 0.78 inch for the standard rain gage and 0.79 inch for the new ASOS weighing gage. TODAY'S MANUAL OBSERVATIONS.... 7/15/2004 THU 8 a.m. estimated 600 overcast with 6 miles visibility and thin fog; temp. 62; dewpoint 61; wind sse at 9 mph; 24-hr precip. 0.18 ins.; 6-hourly max. temp. 62 deg.; 6-hourly min. temp. 60 deg. BHO SA 1155 E6 OVC 6F 020/62/61/1508/959/ 8//// 58001 ASOS 70018 MANUAL 70018 10062 20060 11 a.m. estimated 800 overcast with 9 miles visibility and hazy with a break in stratus overcast; temp. 68; dewpoint 63; wind s 10 mph; BHO SA 1455 E8 OVC 9 021/68/63/1709/959/ BINOVC HAZY/ 8/6// 51001 2 p.m. broken cumulus, moderate cumulus and stratocumulus clouds and hazy with 25 miles visibility except 20 miles northeast through southeast; temp. 74 and dewpoint 64; wind ssw at 16 mph; six hourly maximum temp. 76; six hourly minimum temp. 60 deg. BHO SA 1755 20 SCT E30 BKN 25 015/74/64/2114/957/ BKN V SCT MDT CU ALQDS HAZY ALQDS VSBY NE-SE 20/ 8/200 58006 10076 20062 WEATHER SUMMARY FOR WEDNESDAY JULY 14: TEMPERATURE (DEGREES F) MAX.....63 NORMAL.....81 HAZEN SHELTER: 63.4 @ 2:32 p.m. MIN.....59 NORMAL.....62 HAZEN SHELTER: 59.3 @ 7:46 p.m. MEAN....61 NORMAL.....72 DEPARTURE FROM 30-YEAR NORMAL.........-11 TOTAL DEPARTURE FOR THE MONTH.........-36 JULY IS AVERAGING 2.8 DEGREES COOLER THAN NORMAL PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.........27 NNE AT 6:28 a.m. AEROVANE..........29 NNE AT 6:28 a.m. ASOS..............23 NNE AT 7:09 a.m. DAVIS.............28 NNE AT 6:28 a.m. ASOS 2-MINUTE.....18 NNE AT 6:29 a.m. FASTEST MILE......19 NNE AT 5:44 a.m. OUR AVERAGE....... 9.9 MPH NNE ASOS AVERAGE...... 9.5 MPH NNE [20 deg.] DAVIS AVERAGE.....10.3 MPH NNE [25 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT) TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.18 DEPARTURE....+0.06 ASOS..............0.18 TOTAL PRECIPITATION FOR THE MONTH..........3.07 DEPARTURE....+1.37 ASOS..............3.10 TOTAL PRECIPITATION FOR THE YEAR..........25.94 DEPARTURE....-1.43 ASOS.............24.36 PRELIMINARY CLIMATE SUMMARY FOR JULY 2004......CALENDAR DAY DATA DATA REPORTED: 24 HOUR PERIODS ENDING MIDNIGHT EST 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 7/1 82/62//72/+2/0.06/T/503/55 29 MPH S TSTM trace/sml hail 7/2 83/59/71/+1/0.93/T/575/63 45 MPH W TSTM trace of hail * 7/3 80/59/70/0/0/894/98 21 MPH NNW 7/4 81/59/70/0/0/817/90 23 MPH SSE 7/5 69/63/66/-5/1.29/000/00 33 MPH S 7/6 79/65/72/+1/T/364/40 22 MPH NW 7/7 78/63/71/0/0/690/76 23 MPH SSE 7/8 75/62/69/-2/0.01/045/05/ 24 MPH S 7/9 75/62/69/-2/0/535/59 25 MPH S 7/10 80/59/70/-1/0/842/93 21 MPH NW 7/11 74/60/67/-5/0/713/79 20 MPH N 7/12 76/59/68/-4/0/189/21 24 MPH S 7/13 64/60/62/-10/0.51/000/00 28 MPH ENE 7/14 63/59/61/-11/0.18/000/00 27 MPH NNE PLEASE NOTE: SEVERAL CHANGES HAVE BEEN MADE TO DAILY MINUTES OF SUNSHINE FROM PREVIOUS DAYS' REPORTS... 7/15 ...MORNING LOW 62...NO SUNSHINE & NO PRECIPITATION VERY HEAVY RAINFALL EVENT ON JULY 2ND..... 7/2.. * short period rainfall 0.41 in 3 mins.; 0.50 in 5 mins.; 0.80 in 10 mins. 0.86 in 15 mins.... DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JULY 15 HIGH 94F IN 1995 LOW 50F IN 1929, 1930 PRECIP 1.64 INS IN 1896 WIND 71 MPH WNW IN 2002 RECORDS FOR JULY 16 HIGH 94F IN 1968, 1980, 1983, 1999 LOW 50F IN 1889, 1903 PRECIP 0.89 INS IN 1919 WIND 48e MPH SW 1944 RECORDS FOR JULY 17 HIGH 96F IN 1999 LOW 47F IN 1892 PRECIP 1.39 INS IN 1989 WIND 46 MPH WNW IN 1971 RECORDS FOR JULY 18 HIGH 96F IN 1991, 1999 LOW 54F IN 1892, 1956, 1971 PRECIP 1.65 INS IN 2000 WIND 43e MPH SW IN 1949 RECORDS FOR JULY 19 HIGH 96F IN 1977, 1991 LOW 50F IN 1890 PRE 1.10 INS IN 1951 WIND 63 MPH SSW IN 1982 RECORDS FOR JULY 20 HIGH 99F IN 1991 LOW 47F IN 1890 PRE 1.64 INS IN 1938 WIND 56e MPH SSW IN 1943 RECORDS FOR JULY 21 HIGH 100F IN 1977 [RECORD FOR MONTH] LOW 48F IN 1890 PRECIP 2.09 INCHES IN 1938 PEAK GUST 60e MPH WNW IN 1977 RECORDS FOR JULY 22 HIGH 99F IN 1926 LOW 52F IN 1890 PRECIP 1.73 INCHES IN 1900 PEAK GUST 55 MPH IN 1983 RECORDS FOR JULY 23 HIGH 99F IN 1952 LOW 51F IN 1923,1977 PRECIP 1.82 INCHES IN 1953 PEAK GUST 54e MPH S IN 1946 TODAY'S REPORT BY: Kim Jeffs/Robert Skilling