BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, JUNE 26, 2009 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Scattered altocumulus, overcast cirrostratus, stratus SE-SW, thin spots in overcast, thin fog Temperature: 66F, Dew point: 64F, Wind: S at 8 kts Sea-level pressure: 29.71 inches Hg, rising Visibility: 10 miles, thin fog 6-hour minimum temp: 62F 6-hour rainfall: 0.01 in. 24-hour rainfall: 0.02 inch BHO SA 1155 140 SCT E200 OVC 10 062/66/64/1908/971/ STRA SE-SW THN SPTS IOVC THN FG/ 8/637 51004 MANUAL 6001/ ASOS 60001 MANUAL 70002 ASOS 70002 10066 20062 10 A.M. Weather: Scattered altocumulus, broken altocumulus, overcast cirrus, breaks in overcast NW-N and E, hazy Temperature: 75F, Dew point: 69F, Wind: S at 8 kts, Wind: Variable direction S-WSW Sea-level pressure: 29.70 inches Hg, falling Visibility: 10 miles, hazy BHO SA 1455 110 SCT E180 BKN 250 OVC 10 057/75/69/1908/970/ BRKS IOVC NW-N AND E HZY WND 17V24/ 8/077 57005 1 P.M. Weather: Overcast stratus, few lower cumulus fractus, light rain, hazy Temperature: 71F, Dew point: 65F, Wind: WSW at 13G25 kts, Wind: Peak gust past hour 26 kts WSW at 12:43 P.M. Sea-level pressure: 29.71 inches Hg, rising Visibility: 10 miles, hazy 6-hour precipitation: Trace BHO SA 1755 E15 OVC 10R- 060/71/65/2413G25/971/ FEW LWR CUFRA N-E HAZY PK WND 2426/43 RB30/ 8/6// 53009 MANUAL 6000/ 10079 20066 WEATHER SUMMARY FOR THURSDAY, JUNE 25 TEMPERATURE (DEGREES F) MAX.....74 NORMAL.....78 MIN.....58 NORMAL.....58 MEAN....66 NORMAL.....68 DEPARTURE FROM 30-YEAR NORMAL...........-2 TOTAL DEPARTURE FOR THE MONTH.........-102 [-4.3 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............0 DEPARTURE.......-1 TOTAL HEATING UNITS FOR THE MONTH...........110 DEPARTURE......+41 TOTAL HEATING UNITS FOR THE SEASON.........6231 DEPARTURE.....-135 TOTAL HEATING UNITS LAST SEASON TO DATE....5942 DIFFERENCE....+289 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............21 SSW AT 10:58 P.M. * AEROVANE..............17 SSW AT 10:58 P.M. * ASOS..................18 SW AT 10:58 P.M. DAVIS.................20 SSW AT 10:58 P.M. FASTEST MILE FOR YESTERDAY...............16 SSW AT 10:59 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............18 SW AT 11:02 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........16 SSW AT 10:57 P.M. AVERAGE WIND SPEED AND DIRECTION........5.6 S ASOS.................6.1 DAVIS................5.0 S [188 DEG] * last of several occurrences.... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M... 0.02 DEPARTURE....-0.11 ASOS..............0.02 TOTAL PRECIPITATION FOR JUNE..............4.37 DEPARTURE....+1.09 ASOS..............4.35 TOTAL PRECIPITATION FOR THE YEAR..........22.87 DEPARTURE....-2.15 ASOS.............23.90 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/568/62 22 NNE 6/17 74/50/62/-4/0/807/88 28 S AERO 24 MPH S 6/18 65/52/59/-7/0.44/000/00 35 ESE 6/19 70/61/66/-1/0.47/000/00 33 SE AERO 31 MPH SE 6/20 76/60/68/+1/0/266/29 21 NNE 6/21 61/57/59/-8/0.55/000/00 44 N Aero 42 MPH N 6/22 60/58/59/-8/1.26/000/00 42 NNE Aero 39 MPH NNE 6/23 64/57/61/-7/0.33/000/00 38 N Aero 33 MPH N 6/24 62/55/59/-9/0.12/000/00 27 N Aero 23 MPH N 6/25 74/58/66/-2/0.02/.../.. 21 SSW Aero 17 MPH SSW 6/26 our morning low temp: 62F; the normal low is now 59F 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 26 HIGH 96F IN 1952 LOW 45F IN 1986 PRECIP 1.52 INS IN 1945 PEAK GUST 48 MPH N IN 1998 RECORDS FOR JUNE 27 HIGH 93F IN 1999, 2007 LOW 46F IN 1897 PRECIP 1.72 INS IN 1938 PEAK GUST 55e N IN 1945 TODAY'S REPORT PREPARED BY: Stephanie Radner