BLUE HILL METEOROLOGICAL OBSERVATORY  MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, NOVEMBER 24, 2010 ALL TIMES ARE IN EASTERN STANDARD TIME   COLD AIR RETURNS ON BLUSTERY W-WNW WINDS GUSTING TO OVER 50 MPH LAST EVENING AND CLOSE TO 50 MPH AGAIN TODAY TEMPERATURE FALLS FROM 60 TUESDAY AFTERNOON TO 38 THIS MORNING   Very gusty winds accompanied a dry cold frontal passage Tuesday evening with the peak gust recorded close to 50 MPH at 10:15 PM.  Temperatures fell to the low for the day of 47F at midnight as the air mass became much drier.  Dew points fell from near 50 degrees early in the evening to the 20's by late last night. The sun rose into a clear sky at 6:44 AM and we are recording unlimited sunshine today.  Visibility has increased to at least 80 miles.  The colder air rushing in on gusty winds is holding the daytime high temperature to the mid-40's while dew points dropped to near 10 degrees.        Today's observations:    7 A.M. Weather: Clear, stratocumulus all quadrants Temperature: 39F, Dew point: 22F; Wind: WNW at 19G29 kts, Wind: Peak wind 37 kts WNW at 6:21 AM Wind: Direction variable W to NW Sea-level pressure: 29.91 inches Hg, rising Visibility: 55 miles, light distant haze  6-hour minimum temp: 38F 24-hour rainfall: 0.00 inch BHO SA 1155 CLR 55 127/39/22/2919G29/991/ SC ALQDS LGT DSNT HZ PK WND 2937/21/ WND 26V32/ 8/500 53015 10044 20038    10 A.M. Weather: Clear, cumulus fractus forming, cumulus and stratocumulus all quadrants  Temperature: 41F, Dew point: 20F; Wind: WNW at 17G34 kts, Wind: Peak wind 39 kts W at 9:11 AM Sea-level pressure: 29.96 inches Hg, rising  Visibility: 80 miles BHO SA 1455 CLR 80 144/41/20/3017G34/996/ CUFRA FRMG CU/SC ALQDS PK WND 2839/11/ WND 25V32 8/100 53017   1 P.M. Weather: Clear, few stratocumulus distant offshore NE-E, few cirrus along horizon distant SSW Temperature: 43F, Dew point: 15F; Wind: WNW at 20G42 kts, Wind: Peak wind 42 kts WNW at 12:49 PM, Wind: Direction WSW variable to NNW  Sea-level pressure: 29.93 inches Hg, falling Visibility: 80 miles  6-hour max. temp: 44F  BHO SA 1755 CLR 80 136/43/15/3020G42/993/ FEW SC OFFSHR DSNT NE-E FEW CI DSNT CI SSW PK 2942/49/ WND 25V33/ 8/501 58008 10044 20039   WEATHER SUMMARY FOR TUESDAY, NOVEMBER 23   TEMPERATURE (DEGREES F) MAX.....60     NORMAL.....46 MIN.....47     NORMAL.....32 MEAN....54     NORMAL.....39   DEPARTURE FROM 30-YEAR NORMAL................+15 TOTAL DEPARTURE FOR THE MONTH................+24 [+0.8 DEGREES/DAY]   HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............11    DEPARTURE.......-15 TOTAL HEATING UNITS FOR THE MONTH...........481    DEPARTURE.......-25 TOTAL HEATING UNITS FOR THE SEASON..........959    DEPARTURE......-139 TOTAL HEATING UNITS LAST SEASON TO DATE....1018    DIFFERENCE......-59   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............50 WNW AT 10:15 P.M.                    AEROVANE..............52 WNW AT 10:15 P.M.                    ASOS..................51 W   AT 10:15 P.M.                              DAVIS.................53 WNW AT 10:15 P.M.          THE FASTEST MILE FOR YESTERDAY...........38 WNW AT 10:17 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE............35 W   AT 10:16 P.M.           MAXIMUM 2-MINUTE DAVIS AVERAGE...........37 W   AT 10:15 P.M.      AVERAGE WIND SPEED AND DIRECTION........13.7 S                    ASOS.................13.5                             DAVIS................13.3 SSW [210 DEG]   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE........-0.15                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........4.19  DEPARTURE........+0.60                          ASOS..............4.24 TOTAL PRECIPITATION FOR THE YEAR..........57.91  DEPARTURE.......+12.30                          ASOS.............57.79** ** ASOS missing rainfall due to system failure on 6/24-25   SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.....-0.1 TOTAL SNOWFALL FOR THE MONTH................0.1  DEPARTURE.....-1.9 TOTAL SNOWFALL FOR THE SEASON...............0.1  DEPARTURE.....-2.1    PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2010 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 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized   11/1  49/29/39/-8/0.00/446/72      24 WNW 11/2  46/33/40/-6/0.00/271/44      21 NW 11/3  50/28/39/-7/0.00/264/43      20 SSE 11/4  54/37/46/0/0.91/000/00       43 NNE  AERO 45 MPH NE 11/5  59/44/52/+7/0.51/000/00      36 S    AERO 39 MPH S 11/6  48/38/43/-2/000/0.0/134/22   20 N 11/7  42/33/38/-7/0.17/T/012/02    32 NW 11/8  47/32/40/-4/1.17/0.1/000/00  60 N    AERO 60 MPH N 11/9  50/42/46/+2/0.21/0.0/006/01  32 N    AERO 35 MPH N 11/10 45/39/42/-2/0.17/0.0/006/01  38 N    AERO 42 MPH N 11/11 45/37/41/-2/0.00/0.0/411/69  43 NNE  AERO 43 MPH NNE 11/12 53/35/44/+1/0.00/0.0/594/100 23 N   11/13 61/42/52/+9/0.00/0.0/592/100 20 N  11/14 50/41/46/+4/0.00/0.0/153/26  25 NNE 11/15 52/44/48/+6/0.00/0.0/018/03  15 SE  11/16 54/46/50/+8/.../0.0/023/04   20 E 11/17 62/46/54/+13/.../0.0/204/35  45 WSW  AERO 48 MPH WSW 11/18 52/37/45/+4/0.00/0.0/540/93  51 W    AERO 55 MPH W 11/19 43/32/38/-3/0.00/0.0/423/73  26 W 11/20 51/31/41/+1/0.00/0.0/334/58  40 W    AERO 44 MPH W 11/21 37/29/33/-7/0.00/0.0/569/99  22 NW 11/22 53/31/42/+2/0.01/0.0/000/00  32 SSE  AERO 33 MPH SSE 11/23 60/47/54/+15/0.00/0.0/006/01 50 WNW  AERO 52 MPH WNW   11/24 morning low temp: 38F; the normal low 32F   NEW DAILY RECORDS FOR NOVEMBER 2010 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