BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, NOVEMBER 24, 2011 THANKSGIVING DAY ALL TIMES ARE IN EASTERN STANDARD TIME RAINSTORM FOR NOVEMBER 22-23 LEFT 1.57 INCHES A SUNNY, FROSTY START WITH LIGHT WINDS TO HOLIDAY GUSTY N WINDS LAST EVENING DIMINISHED RAPIDLY DURING THE EARLY MORNING HOURS OF TODAY The rainstorm which began late Tuesday evening brought 1.57 inches and yesterday morning making November now a near-normal month for precipitation after being a drier than normal month. Thanksgiving Day morning dawned mostly clear and frosty as temperatures dropped to near the dew point with a low of 28 degrees by 7 A.M. The gusty north winds late yesterday and last evening lost their gusty character by 1:30 A.M. this morning and had diminished to well under 10 MPH by sunrise. The holiday looks to be slightly colder than normal with sunshine and light winds. The month of November is still averaging much on the warm side. See stats below... BLUE HILL WARMEST NOVEMBER AVERAGE MAXIMUM TEMPERATURE 1) 55.8F 1975 2) 54.9F 1927 3) 54.8F 2001 4) 54.6F 2006 1941 1931 7) 54.5F 1994 1948 9) 54.0F 1979 10) 53.9F 1999 1953 The current November average maximum temperature is 56.2F BLUE HILL WARMEST NOVEMBER AVERAGE MINIMUM TEMPERATURE 1) 40.7F 2009 2006 3) 40.2F 1948 4) 40.1F 1975 5) 39.3F 1979 6) 38.4F 1931 7) 38.0F 1953 8) 37.9F 1963 9) 37.8F 2001 10) 37.6F 1999 The current November average minimum temperature is 39.4F BLUE HILL WARMEST NOVEMBER CORRECTED MEAN TEMPERATURE 1) 47.4F 1975 2) 47.1F 2006 3) 46.4F 2009 1979 1948 6) 46.0F 2001 7) 45.7F 1999 1953 9) 45.6F 1931 10) 45.5F 1994 The current November corrected mean temperature is 47.5F Today's observations: 7 A.M. Weather: Clear, stratocumulus N-E-distant S-SSW, few cirrus W-N, patches of dense shallow ground fog about 10 miles WSW and thin shallow fog distant W-WNW, frost on grassy and wooden surfaces Temperature: 28F, Dew point: 27F; Wind: NW at 7 kts, Sea-level pressure: 30.09 inches Hg, rising Visibility: 35 miles, except 30 miles SW-NW, patches of dense shallow ground fog and thin ground fog, visibility to the NE 50 miles 6-hour min. temp: 28F 24-hour rainfall: 0.31 in. BHO SA 1155 CLR 35 190/28/27/3207/009/ SC N-E-DSNT S-SW FEW CI W-N PTCH DNS GF 10 WSW THN GF DSNT W-NW VSBY SW-NW 30 VSBY NE 50 FROST GRASSY/WOOD SFCS/ 8/501 51021 ASOS 70034 MANUAL 70031 10031 20028 10 A.M. Weather: Scattered stratocumulus and scattered cirrus Temperature: 36F, Dew Point: 29F; Wind: NW at 7 kts Wind: Direction variability W-NNW Sea-level pressure: 30.14 inches Hg, rising Visibility: 55 miles, light distant haze BHO SA 1455 15 SCT 250 SCT 55 206/36/29/3107/014/ SC ALQDS CI WSW-N LGT DSNT HZ WND 27V33/ 8/501 51016 WEATHER SUMMARY FOR WEDNESDAY, NOVEMBER 23 TEMPERATURE (DEGREES F) MAX.....46 NORMAL.....46 MIN.....31 NORMAL.....32 MEAN....39 NORMAL.....39 DEPARTURE FROM 30-YEAR NORMAL.......................0 TOTAL DEPARTURE FOR THE MONTH....................+121 [+5.1 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............26 DEPARTURE..........0 TOTAL HEATING UNITS FOR THE MONTH............384 DEPARTURE.......-123 TOTAL HEATING UNITS FOR THE SEASON...........810 DEPARTURE.......-288 TOTAL HEATING UNITS LAST SEASON TO DATE......959 DIFFERENCE......-149 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..............44 E AT 6:16 A.M. AERO...................43 E AT 6:16 A.M. ASOS...................45 E AT 6:16 A.M. DAVIS..................40 ENE AT 6:14 A.M. RMY 43 MPH THE FASTEST MILE FOR YESTERDAY............ MAXIMUM 2-MINUTE ASOS AVERAGE.............32 E AT 6:17 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE............30 E AT 6:29 A.M. AVERAGE WIND SPEED AND DIRECTION........18.2 N ASOS.................17.5 DAVIS................16.2 NNE [030 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.31 DEPARTURE..........+0.16 ASOS..............0.34 TOTAL PRECIPITATION FOR THE MONTH ........3.69 DEPARTURE..........+0.10 ASOS..............3.67 TOTAL PRECIPITATION FOR THE YEAR..........57.71 DEPARTURE.........+12.10 ASOS..............58.12** **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 THE MONTH................0.0 DEPARTURE.........-2.0 TOTAL SNOWFALL FOR THE SEASON...............8.5 DEPARTURE.........+6.3 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/+15/0.00/0.0/580/96 20 W AERO 21 MPH W RMY N/A 11/9 68/50/59/+15/0.00/0.0/584/97 22 S AERO 23 MPH S RMY 23 11/10 60/53/57/+13/1.12/0.0/000/00 22 WNW AERO 22 MPH WNW RMY N/A 11/11 55/37/46/+3/T/0.0/358/60 41 W AERO 44 MPH W RMY 45 11/12 52/34/43/0/0.00/0.0/524/88 35 SSW AERO 38 MPH SSW RMY 38 11/13 62/43/53/+10/0.00/0.0/243/41 36 S AERO 37 MPH S RMY 38 11/14 67/52/60/+18/T/0.0/372/63 33 SSW AERO 35 MPH SSW RMY N/A 11/15 66/55/61/+19/T/0.0/053/09 37 SSW AERO 38 MPH SSW RMY 38 11/16 58/52/55/+13/0.84/0.0/000/00 18 S AERO 21 MPH S RMY 21 11/17 53/34/44/+3/0.16/0.0/006/01 31 WNW AERO 31 MPH WNW RMY 32 11/18 43/31/37/-4/0.00/0.0/576/99 32 W AERO 33 MPH W RMY 32 11/19 52/34/43/+2/0.00/0.0/347/60 39 SW AERO 40 MPH SW RMY 42 11/20 64/47/56/+16/0.00/0.0/451/78 39 SW AERO 40 MPH SW RMY 42 11/21 55/34/45/+5/0.00/0.0/.../.. 30 WNW AERO 32 MPH WNW RMY N/A 11/22 46/33/40/0/0.11/.../.. 23 ESE AERO 23 MPH ESE RMY N/A 11/23 46/31/39/0/1.46/000/00 44 E AERO 43 MPH E RMY 43 11/24 morning low temp: 28F; the normal low is now 32F 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 24 HIGH 69 IN 1931 LOW 7 IN 1897 PRECIP 1.76 INCHES IN 1901 SNOWFALL 4.5 INS IN 1936 PEAK GUST 69 SSW IN 1959 RECORDS FOR NOVEMBER 25 HIGH 71 IN 1979 LOW 13 IN 1938 PRECIP 3.10 INCHES IN 1983 SNOWFALL 8.0 INS IN 1888 PEAK GUST 94e E IN 1950 TODAY'S REPORT PREPARED BY: Robert Skilling