BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, JUNE 10, 2010 ALL TIMES ARE IN EASTERN STANDARD TIME MORE COOLER THAN NORMAL TEMPS. BRING AVERAGE DAILY TEMPERATURE TO LESS THAN 4 DEGREES ABOVE NORMAL AFTER A VERY WARM START TO JUNE SHOWERS BRING JUST A QUARTER OF AN INCH OF RAIN TO BLUE HILL Yesterday's average temperature of 60 degrees F was 4 degrees below normal for the second day in a row. The average daily temperature, which was 7 degrees above normal during the first week of June, has dropped to less than 4 degrees above normal. Moderate rain late yesterday afternoon and light showers and drizzle early this morning brought just 0.25 inch of rain as of 8:00 AM EDT. Light drizzle today has only resulted in an additional 0.01 inch of rain as of 2:00 PM EDT. Today's observations: 7 A.M. Weather: Sky obscured with fog Temperature: 52F, Dew point: 52F, Wind: ENE at 4 kts, Wind: Light Sea-level pressure: 29.88 inches Hg, falling slightly Visibility: 1/4 mile, 1.5 miles SE-SW, fog 6-hour minimum temp: 50F 24-hour rainfall: 0.25 inch BHO SA 1155 W3 X 1/4F 118/52/52/0704/988/ VSBY SE-SW 11/2 WND LGT/ 8//// 55001 MANUAL 600X/ ASOS 60006 MANUAL 70025 ASOS 70024 10052 20050 10 A.M. Weather: Overcast stratus, stratus drifting over the summit, fog and light drizzle Temperature: 56F, Dew point: 55F, Wind: E at 4 kts, Wind: Light Sea-level pressure: 29.87 inches Hg, falling Visibility: 1 mile, variable 1/4 to 1.5 miles 3-hour rainfall: 0.01 inch BHO SA 1455 E5 OVC 1VL-F 116/56/55/0804/987/ 8/7// STRA DRFTG OVR SMT VSBY 1/4V11/2 WND LGT PCPN VRY LGT/ 57002 MANUAL 6001/ ASOS 60002 1 P.M. Weather: Sky obscured with fog, light drizzle Temperature: 57F, Dew point: 56F, Wind: N at 5 kts, Wind: Light and variable Sea-level pressure: 29.86 inches Hg, falling Visibility: 75 miles 6-hour max. temp: 58F 6-hour rainfall: 0.01 inch BHO SA 1755 W2 X 1/16L-F 112/57/56/3505/986/ WND LGT AND VRB PCPN VRY LGT/ 8//// 56004 MANUAL 6000/ 10058 20052 WEATHER SUMMARY FOR WEDNESDAY, JUNE 9 TEMPERATURE (DEGREES F) MAX.....70 NORMAL.....74 MIN.....49 NORMAL.....54 MEAN....60 NORMAL.....64 DEPARTURE FROM 30-YEAR AVERAGE................-4 TOTAL DEPARTURE FOR THE MONTH................+37 [+3.9 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............5 DEPARTURE........+2 TOTAL HEATING UNITS FOR THE MONTH............13 DEPARTURE.......-23 TOTAL HEATING UNITS FOR THE SEASON.........5654 DEPARTURE......-679 TOTAL HEATING UNITS LAST SEASON TO DATE....6156 DIFFERENCE.....-502 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............27 SSW AT 3:34 P.M. AEROVANE..............38 SSW AT 3:35 P.M. ASOS..................29 SW AT 3:35 P.M. DAVIS.................30 SSW AT 3:35 P.M. THE FASTEST MILE FOR YESTERDAY...........24 SSW AT 3:35 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............22 SW AT 3:37 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........24 SSW AT 3:36 P.M. AVERAGE WIND SPEED AND DIRECTION........10.4 WNW ASOS.................10.0 DAVIS................10.0 SW [221 DEG] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.25 DEPARTURE......+0.12 ASOS..............0.24 TOTAL PRECIPITATION FOR THE MONTH..........1.34 DEPARTURE......+0.17 ASOS..............1.33 TOTAL PRECIPITATION FOR THE YEAR..........34.75 DEPARTURE.....+11.84 ASOS.............34.81 PRELIMINARY CLIMATE SUMMARY FOR JUNE 2010 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 6/1 82/57/70/+8/0.86/0/199/22 33 WNW AERO 38 MPH WNW TSTM 6/2 80/59/70/+8/0.00/752/83 22 S 6/3 80/59/70/+8/T/263/29 28 S AERO 31 MPH S TSTM 6/4 84/59/72/+9/0/499/55 23 SSW 6/5 83/63/73/+10/0.16/309/34 32 W AERO 36 MPH W TSTM 6/6 80/54/67/+4/0.07/064/07 43 S AERO 48 MPH S TSTM 6/7 72/51/62/-2/T/683/75 27 W AERO 30 MPH WNW 6/8 69/51/60/-5/T/812/89 30 WNW AERO 33 MPH WNW 6/9 70/49/60/-5/.../.../.. 27 SSW 6/10 our morning low temp: 50F; the normal low is now 54F NEW DAILY RECORDS FOR JUNE 2010 None to date DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 10 HIGH 98F IN 2008 LOW 42F IN 1913,1920 PRECIP 2.51 INCHES IN 1931 PEAK GUST 60e MPH NW IN 1941 RECORDS FOR JUNE 11 HIGH 92F IN 1973,1984,1997 LOW 40F IN 1972 PRECIP 2.66 INS 1922 PEAK GUST 43e MPH S IN 1945 TODAY'S REPORT PREPARED BY: Stephanie Radner