BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JUNE 30, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME WARM, MOSTLY SUNNY AND DRY WEATHER TODAY... Cooler and drier weather has moved into New England after a hot and humid week. Only a few cumulus clouds have formed today with a band of cirrus visible to the south marking a front offshore. Visibility is generally good today at 70-75 miles, and the dew point has dropped into the upper 40s. Today's observations: 7 A.M. Weather: Clear, few cirrus SE-SW Temperature: 65F, Dew point: 51F, Wind: W at 8 kts Sea-level pressure: 29.97 inches Hg, rising Visibility: 70 miles 6-hour min temp. 57F BHO SA 1155 CLR 70 148/65/51/2708/997/ CI SE-SW WND LGT/ 8/001 53007 10065 20057 10 A.M. Weather: Scattered cumulus and a few cirrus Temperature: 73F, Dew point: 50F, Wind: WNW at 8 kts Wind: Light and variable Sea-level pressure: 29.96 inches Hg, falling Visibility: 75 miles BHO SA 1455 30 SCT 75 145/73/50/2908/996/ CI SE-SW FEW CUFRA VCNTY STN WND LGT AND VRB/ 8/101 56003 1 P.M. Weather: Broken cumulus and cirrus Temperature: 75F, Dew point: 49F, Wind: W at 9 kts Wind: Peak gust 24 kts past hour Sea-level pressure: 29.93 inches Hg, falling Visibility: 75 miles 6-hour max. temp: 78F BHO SA 1755 65 SCT 80 BKN 250 BKN 75 135/75/49/2809/993/ PK GST 24 KTS PST HR/ 8/201 56010 10078 20065 WEATHER SUMMARY FOR FRIDAY, JUNE 29 TEMPERATURE (DEGREES F) MAX.....73 NORMAL.....79 MIN.....59 NORMAL.....59 MEAN....66 NORMAL.....69 DEPARTURE FROM 30-YEAR NORMAL.............-3 TOTAL DEPARTURE FOR THE MONTH............+16 (+0.4 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............0 DEPARTURE.........-1 TOTAL HEATING UNITS FOR THE MONTH...........80 DEPARTURE.........+7 TOTAL HEATING UNITS FOR THE SEASON........5911 DEPARTURE.......-459 TOTAL HEATING UNITS LAST SEASON TO DATE...5791 DIFFERENCE......+120 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............25 WNW AT 2:42 A.M. AEROVANE.............24 WNW AT 2:42 A.M. ASOS.................N/A # DAVIS................25 NW AT 2:41 A.M. FASTEST MILE FOR YESTERDAY..............15 WNW AT 2:43 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A # MAXIMUM 2-MINUTE DAVIS AVERAGE..........17 WNW AT 2:43 A.M. AVERAGE WIND SPEED AND DIRECTION.......9.4 WNW ASOS.................N/A # DAVIS...............8.5 WNW [298 deg] # ASOS WINDS SWITCHED OFF BY NWS 6/6, IT IS NOT KNOWN WHEN THAT DATA WILL RESUME PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE.....-0.13 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........2.82 DEPARTURE.....-0.98 ASOS..............2.77 TOTAL PRECIPITATION FOR THE YEAR..........26.98 DEPARTURE.....+1.44 ASOS.............26.41 PRELIMINARY CLIMATE SUMMARY FOR JUNE 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 6/1 87/56/72/+10/0.12/660/73 45 NNW Aero 44 MPH TSTM AM/PM 6/2 87/64/76/+14/0.01/290/32 23 SSE TSTM PM 6/3 68/50/59/-3/0.14/000/000 24 NNE TSTM AM (no rain) 6/4 63/50/57/-6/1.52/000/00 35 NE TSTM 10:15-10:50 A.M. 6/5 78/57/68/+5/0.01/455/50 38 S 6/6 70/49/60/-3/0/637/70 35 W 6/7 69/44/57/-7/0/528/58 23 W 6/8 78/58/68/+4/0/748/82 20 WSW 6/9 63/54/59/-5/0.02/000/00 18 ENE 6/10 70/50/60/-4/0/831/91 22 ENE 6/11 77/62/70/+5/0.04/594/65 29 NE 6/12 70/56/63/-2/0.09/192/21 29 NNE 6/13 56/50/53/-12/0.01/000/00 42 NNE Aero 40 MPH NNE 6/14 59/49/54/-11/0/036/04 34 NNE 6/15 69/46/58/-8/0/769/84 21 NNE 6/16 80/55/68/+2/0/577/63 25 SW 6/17 85/58/72/+6/T/632/69 31 W 6/18 79/60/70/+4/0/880/96 23 NW 6/19 84/62/73/+6/0/578/63 25 SSW 6/20 74/60/67/0/0.38/147/16 25 W 6/21 77/56/67/0/0.23/823/90 30 WSW TSTM evening 6/22 71/54/63/-4/0.06/560/61 37 NW TSTM 1:15-1:30 P.M. 6/23 68/50/59/-9/0/816/89 33 W 6/24 76/52/64/-4/0/807/88 28 W 6/25 86/64/75/+7/0/752/82 31 SSW 6/26 92/63/78/+10/0/806/88 25 SSW 6/27 93/72/83/+14/0/726/82 33 S 6/28 88/71/80/+11/0.18/376/41 32 SSW TSTM evening 6/29 73/59/66/-3/0/.../.. 25 WNW 6/30 morning low temp. 57 deg; normal low 59 deg. NEW DAILY RECORDS FOR JUNE 2007: 6/4 - NEW RECORD DAILY RAINFALL OF 1.52 INS; THE PREVIOUS RECORD WAS 1.29 INS. IN 1898. 6/27 - TIED RECORD HIGH MAXIMUM OF 93 DEGREES; THE PREVIOUS RECORD WAS 93 DEGREES SET IN 1999. 6/27 - NEW RECORD HIGH MINIMUM OF 72 DEGREES; THE PREVIOUS RECORD WAS 71 DEGREES SET IN 2003. 6/28 - NEW RECORD HIGH MINIMUM OF 71 DEGREES; THE PREVIOUS RECORD WAS 69 DEGREES SET IN 1901, 1991, 1999, AND 2005. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 30 HIGH 94F IN 1964 LOW 47F IN 1919 PRECIP 3.04 INS IN 1921 PEAK GUST 51 MPH WNW IN 1957 RECORDS FOR JULY 1 HIGH 98F IN 1964 LOW 44F IN 1988 [RECORD FOR MONTH] PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH] PEAK GUST 52 MPH WNW IN 1974 TODAY'S REPORT PREPARED By: Mike Iacono/Eli Melaas If you do not wish to receive this Daily Discussion and Climate Summary from the Blue Hill Observatory, please send an email to sitemaster@bluehill.org.