BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, JUNE 21, 2009 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Obscured by light drizzle and fog Temperature: 58F, Dew point: 58F, Wind: NNE at 14G21 kt Sea-level pressure: 29.56 inches Hg, rising Visibility: 1/8 of a mile 6-hour minimum temp: 58F 24-hour rainfall: Trace BHO SA 1155 W2 X1 1/8L-F 009/58/58/0114G21/956/ 8//// 53005 70000 10059 20058 10 A.M. Weather: Obscured by light rain and fog Temperature: 59F, Dew point: 59F, Wind: N at 14G25 kt Sea-level pressure: 29.58 inches Hg, rising Visibility: 1/16 of a mile 3-hour precipitation: 0.11 inches BHO SA 1455 W2 X1 1/16R-F 016/59/59/0114G25/958/ 8//// 53007 6011/ WEATHER SUMMARY FOR SATURDAY, JUNE 20 TEMPERATURE (DEGREES F) MAX.....76 NORMAL.....77 MIN.....60 NORMAL.....57 MEAN....68 NORMAL.....67 DEPARTURE FROM 30-YEAR NORMAL...........+1 TOTAL DEPARTURE FOR THE MONTH..........-68 [-3.6 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............0 DEPARTURE.......-2 TOTAL HEATING UNITS FOR THE MONTH............88 DEPARTURE......+26 TOTAL HEATING UNITS FOR THE SEASON.........6209 DEPARTURE.....-150 TOTAL HEATING UNITS LAST SEASON TO DATE....5942 DIFFERENCE....+267 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............21 NNE AT 11:44 P.M. AEROVANE..............17 NNE AT 11:44 P.M. ASOS..................18 NE AT 11:45 P.M. DAVIS.................18 SSW AT 3:13 P.M. FASTEST MILE FOR YESTERDAY...............14 NNE AT 11:43 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............13 NE AT 11:51 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........13 S AT 3:05 P.M. AVERAGE WIND SPEED AND DIRECTION........5.1 S ASOS.................5.0 DAVIS................4.9 S [168 DEG] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...TRACE DEPARTURE....-0.13 ASOS..............0.00 TOTAL PRECIPITATION FOR JUNE..............2.07 DEPARTURE....-0.56 ASOS..............2.08 TOTAL PRECIPITATION FOR THE YEAR..........20.57 DEPARTURE....-3.80 ASOS.............21.63 PRELIMINARY CLIMATE SUMMARY FOR JUNE 2009 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 69/41/55/-7/0/706/78 29 SSW AERO 25 MPH SSW 6/2 76/53/65/+3/T/525/58 28 S AERO 24 MPH S 6/3 69/54/62/0/T/254/28 23 SSW 6/4 73/53/63/0/0/327/36 22 SSE 6/5 64/51/58/-5/0.05/000/00 21 NE 6/6 73/51/62/-1/0.01/428/47 25 SSE 6/7 79/56/68/+4/0/583/64 28 W AERO 24 MPH W 6/8 73/57/65/+1/0/529/58 18 ENE 6/9 59/51/55/-9/0.10/000/00 27 E 6/10 59/52/56/-8/0.00/000/00 21 NE 6/11 57/52/55/-10/0.17/000/00 23 NNE AERO 21 MPH NE 6/12 70/53/62/-3/0.43/119/13 30 SSE AERO 29 MPH SSE 6/13 75/59/67/+2/T/796/87 23 NNE 6/14 63/54/59/-6/0.34/101/11 20 E 6/15 60/52/56/-10/0.06/027/03 20 NE 6/16 64/51/58/-8/T/.../.. 22 NNE 6/17 74/50/62/-4/0/.../.. 28 S AERO 24 MPH S 6/18 65/52/59/-7/.../.../.. 35 ESE 6/19 70/61/66/-1/.../.../.. 33 SE AERO 31 MPH SE 6/20 76/60/68/+1/.../.../.. 21 NNE NEW DAILY RECORDS FOR JUNE 2009 TO DATE... None DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 21 HIGH 92F IN 1949 LOW 42F IN 1940 PRECIP 1.40 INS 1903 PEAK GUST 51 MPH SSW IN 2000 RECORDS FOR JUNE 22 HIGH 93F IN 1921 LOW 43F IN 1940 PRECIP 1.57 INS IN 1900 PEAK GUST 74 MPH NW IN 1988 TODAY'S REPORT PREPARED BY: Andrew Hoell