BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, NOVEMBER 10, 2011 ALL TIMES ARE IN EASTERN STANDARD TIME HEAVY FOG DEVELOPED AT THE SUMMIT OVERNIGHT RAIN BEGAN BY MID-MORNING AND CONTINUED UNSEASONABLY MILD TEMPERATURES CONTINUE Low clouds enveloped the summit late last night into early this morning resulting in dense fog. Rain spread up from the south by mid-morning and continued into this afternoon. Total of 0.12 inch of rain through 1 PM. Today's observations: 7 A.M. Weather: Obscurement, heavy fog, heavy dew Temperature: 56F, Dew point: 56F; Wind: SSE at 9 kts Sea-level pressure: 29.98 inches Hg, falling Visibility: 1/16, heavy fog 6-hour min. temp: 53F BHO SA 1155 W2 X 1/16F 153/56/56/1509/998/ 8//// 56009 10056 20053 10 A.M. Weather: Broken stratocumulus, overcast altocumulus, few stratus fractus, breaks in overcast SW-N, bright spots in overcast S-W-N, light rain, rain began 9:45 AM Temperature: 58F, Dew Point: 57F; Wind: SE at 7 kts, Wind: Wind gradually backing Sea-level pressure: 29.94 inches Hg, falling Visibility: 6 miles, except 4 miles SE, light rain and fog 3-hourly precip: trace BHO SA 1455 E45 BKN 65 OVC 6R-F 139/58/57/1307/994/ FEW STFRA ALQDS BINOVC SW-N BRGHT SPTS IOVC HIER AC/CI CLDS VSB SW-N VSBY SE 4 WND GRDL BACKING RB45 PCPN VRY LGT/ 58014 8/771 MANUAL 6000/ 1 P.M. Weather: Overcast stratus fractus, fractus drifting over summit, light rain Temperature: 59F, Dew Point: 59F; Wind: ESE at 2 kts, estimated, Sea-level pressure: 29.81 inches Hg, falling Visibility: 3/4 mile, variable 1/4 to 1 mile, north 1/8 mile 6-hour max. temp: 60F 6-hour rainfall: 0.12 in. BHO SA 1755 E3 OVC 3/4VR-F 096/59/59/E1202/981/ STFRA DRFTG OVR/ BLO SMT VSBY 1/8V1 N 1/8 CDNS VRBL WND LGT/ 8/7// 58043 MANUAL 6012/ ASOS 60011 10060 20056 WEATHER SUMMARY FOR WEDNESDAY, NOVEMBER 9 TEMPERATURE (DEGREES F) MAX.....68 NORMAL.....52 MIN.....50 NORMAL.....36 MEAN....59 NORMAL.....44 DEPARTURE FROM 30-YEAR NORMAL....................+15 TOTAL DEPARTURE FOR THE MONTH....................+23 [+2.4 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..............6 DEPARTURE........-15 TOTAL HEATING UNITS FOR THE MONTH............153 DEPARTURE........-25 TOTAL HEATING UNITS FOR THE SEASON...........579 DEPARTURE.......-190 TOTAL HEATING UNITS LAST SEASON TO DATE......679 DIFFERENCE......-100 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............22 S AT 8:46 P.M. AERO...................23 S AT 8:46 P.M. * ASOS...................24 S AT 8:46 P.M. DAVIS..................23 S AT 8:40 P.M. THE FASTEST MILE FOR YESTERDAY............17 S AT 9:14 P.M. * MAXIMUM 2-MINUTE ASOS AVERAGE.............17 S AT 9:14 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE............17 S AT 12:45 P.M. AVERAGE WIND SPEED AND DIRECTION........11.0 S ASOS.................11.1 DAVIS................10.3 S [190 deg] * last of several occurrences.... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE..........-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH ........0.00 DEPARTURE..........-1.36 ASOS..............0.00 TOTAL PRECIPITATION FOR THE YEAR..........54.02 DEPARTURE.........+10.64 ASOS..............54.45** **ASOS data is in error due to system failure on 1/12-13/11 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.........-0.1 TOTAL SNOWFALL FOR NOVEMER..................0.0 DEPARTURE.........-0.6 TOTAL SNOWFALL FOR THE SEASON...............8.5 DEPARTURE.........+7.7 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2011 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant RMY: R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 11/1 50/38/44/-3/0.00/0.0/286/46 25 ENE AERO 24 MPH ENE RMY 24 11/2 54/34/44/-2/0.00/0.0/619/100 17 S AERO 16 MPH S RMY N/A 11/3 60/40/50/+4/0.00/0.0/437/71 27 WSW AERO 30 MPH WSW RMY 28 11/4 49/33/41/-5/0.00/0.0/343/56 33 NW AERO 35 MPH NNW RMY 36 11/5 47/29/38/-7/0.00/0.0/556/91 18 NW AERO 21 MPH NNW RMY 21 11/6 56/35/46/+1/0.00/0.0/603/99 24 SSW AERO 24 MPH SSW RMY 26 11/7 62/39/51/+6/0.00/0.0/600/99 23 WSW AERO 24 MPH SW RMY 25 11/8 68/49/59/+15/0.00/580/96 20 W AERO 21 MPH W RMY N/A 11/9 68/50/59/+15/0.00/584/97 22 S AERO 23 MPH S RMY 23 11/10 our morning low temp: 53F; the normal low is now 36F DAILY RECORDS FOR NOVEMBER 2011 None so far... DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 10 HIGH 75 IN 1931 LOW 20 IN 2004 PRECIP 2.11 INCHES IN 1888 SNOWFALL 2.2 IN 1987 PEAK GUST 83e S IN 1942 RECORDS FOR NOVEMBER 11 HIGH 68 IN 1984 LOW 17 IN 1956 PRECIP 1.14 INCHES IN 1991 SNOWFALL 2.5 IN 1986 PEAK GUST 64 NW IN 1962 TODAY'S REPORT PREPARED BY: Robert Skilling