BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY MONDAY, NOVEMBER 25, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME   UNSEASONABLY COLD EARLY SEASON ARCTIC AIR MASS BRINGS NEAR RECORD COLD MAXIMUM TEMPERATURE SUNDAY WEST-NORTHWEST TO NORTHWEST WINDS GUST OVER 50 MPH DEW POINT TEMPERATURES DROP TO NEGATIVE SINGLE NUMBERS   An unusually strong Arctic high pressure system which was centered along the North Dakota-Canada border early Saturday morning had a central pressure of 1050 millibars or 31.00 inches. Low temperatures dropped to 22 below zero in North Dakota certainly unusually cold even for that location this early in the season.   The Arctic cold front moved through New England Saturday night. Here at the Observatory temperatures fell to 27 degrees by midnight Saturday which actually became the high for Sunday, yesterday, November 24, when the record low maximum was just one degree below that reading at 26 degrees November 24, 1936. Actually the coldest maximum temperature this early in the season is 21 on November 23, 1888. Yesterday's daytime afternoon maximum was 26 degrees.     Dew points continued in single numbers below zero today, most unusual for November.  Relative humidity dropped to 20 to 25%.     Today's Observations:   7 A.M. Weather: Scattered altocumulus lenticularis, scattered cirrus, thin scattered cirrus, few stratocumulus distant S offshore, all clouds NW-E except distant stratocumulus S Temperature: 14F; Dew Point: -2F; Wind: WNW at 12 kts. Wind: Gust to 20 kts past hour Sea-level pressure: 30.33 ins. Hg, increasing then more rapidly Visibility: 75 miles, light distant haze 6-hr min temp: 14F BHO SA 1155 180 SCT 220 SCT 250 -SCT 75 270/14/-2/2912/033/ FEW SC DSNT S ALG HRZN PTCHS ACSL NW-E CLDS AC/CI ALL NW-E LGT DSNT HZ GST 20 KTS PST HR WNDCHILL ZERO/ 8/541 52022 10017 20014   10 A.M.  Weather: Clear, few altocumulus/altocumulus lenticularis distant WSW-NW, few cirrus distant SSW-W Temperature: 22F; Dew Point: -5F; Wind: WNW at 11 kts. Sea-level pressure: 30.37 ins. Hg, increasing then increasing more slowly Visibility: 80 miles BHO SA 1455 CLR 80 283/22/-5/2911/037/ FEW AC/ACSL DSNT WSW-NW FEW CI DSNT SSW-W LGT DSNT HZ WND 26V33/ 8/041 51013   1 P.M. Weather: Clear, few altocumulus lenticularis distant WNW, cirrus mostly distant SE-SW-NW Temperature: 30F; Dew Point: -6F; Wind: WNW at 12 kts, Wind: Direction variable W-NNW Sea-level pressure: 30.34 ins. Hg, falling then more slowly Visibility: 80 miles BHO SA 1755 CLR 80 274/30/-6/3012/034/ FEW ACSL DSNT WNW CI MSTLY DSNT SE-SW-NW WND 26V33/8/041 56009 10031 20014   WEATHER SUMMARY FOR SUNDAY, NOVEMBER 24, 2013   TEMPERATURE (DEGREES F) MAX.....27    NORMAL.....47 MIN.....17    NORMAL.....31 MEAN....22    NORMAL.....39   DEPARTURE FROM 30-YEAR NORMAL.....................-17 TOTAL DEPARTURE FOR THE MONTH.....................-10 [-0.6 DEGREE/DAY]   HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............43  DEPARTURE........+17 TOTAL HEATING UNITS FOR THE MONTH.............544  DEPARTURE........+10 TOTAL HEATING UNITS FOR THE SEASON...........1021  DEPARTURE........-76 TOTAL HEATING UNITS LAST SEASON TO DATE.......960  DIFFERENCE.......+61   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................53 NW  AT  3:34 P.M.                     AERO.......................59 NW  AT  3:34 P.M.                     ASOS.......................58 NW  AT  3:35 P.M.                    DAVIS......................54 W   AT  2:33 P.M. RMY 57 FASTEST MILE FOR YESTERDAY....................N/A* MAXIMUM 2-MINUTE ASOS AVERAGE.................38 NW  AT  3:36 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................36 WNW AT  2:41 P.M. AVERAGE WIND SPEED AND DIRECTION.............N/A* WNW                    ASOS......................23.5                    DAVIS.....................21.2 WNW [300 degrees]   * Contact anemometer data missing from 2:00 P.M. 11/23 to 9:00 A.M. 11/24   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..........1.23   DEPARTURE............-2.56                          ASOS..............1.22 TOTAL PRECIPITATION FOR THE YEAR..........44.24   DEPARTURE............-3.32                          ASOS..............N/A** ** ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals   SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M.......0.0     DEPARTURE.............-0.1 TOTAL SNOWFALL FOR THE MONTH.............0.2     DEPARTURE.............-1.1 TOTAL SNOWFALL FOR THE SEASON............0.2     DEPARTURE.............-1.4   PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2013 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 RMY:  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  68/56/62/+16/0.10/0.0/012/02        60 SSW AERO N/A N/A    RMY 66 11/2  65/49/57/+11/0.00/0.0/296/48        22 WSW AERO N/A N/A    RMY 23 11/3  49/30/40/-6/0.06/T/135/22           23 N   AERO N/A N/A    RMY N/A 11/4  42/27/35/-10/0.00/0.0/588/96        24 NNE AERO N/A N/A    RMY 25 11/5  50/29/40/-5/0.00/0.0/487/80         16 SSW AERO N/A N/A    RMY 17 11/6  59/40/50/+5/0.00/0.0/419/69         30 SSW AERO 31 MPH SSW RMY 33 11/7  65/37/51/+6/0.31/0.0/079/13         33 SW  AERO 37 MPH SW  RMY 37 11/8  48/31/40/-4/T/T/0.0/421/70          37 WNW AERO 37 MPH WNW RMY 39 11/9  44/29/37/-7/0.00/0.0/366/61         25 WNW AERO 25 MPH WNW RMY 29 11/10 52/40/46/+2/0.08/0.0/108/18         31 WNW AERO 33 MPH WNW RMY N/A 11/11 51/36/44/+1/0.00/0.0/500/84         36 WNW AERO 37 MPH WNW RMY 37 11/12 48/24/36/-7/0.11/0.2/000/00         42 SW  AERO 43 MPH SW  RMY 43 11/13 35/21/28/-15/0.00/0.0/591/100       29 NW  AERO 30 MPH NW  RMY 30 11/14 49/26/38/-4/0.00/0.0/536/91         25 SW  AERO 25 MPH SW  RMY 28 11/15 59/38/49/+7/0.00/0.0/393/67         24 S   AERO 25 MPH S   RMY 26 11/16 59/40/50/+8/0.00/0.0/363/62         20 WSW AERO 20 MPH WSW RMY N/A 11/17 59/42/51/+10/0.07/0.0/000/00        23 SSE AERO 25 MPH SSE RMY N/A 11/18 65/46/56/+15/0.28/0.0/400/69        40 SSW AERO 40 MPH S   RMY N/A 11/19 46/28/37/-4/0.00/0.0/428/74         46 WNW AERO 46 MPH WNW RMY 46 11/20 40/25/33/-7/0.00/0.0/.../..         23 NW  AERO 22 MPH NW  RMY 22 11/21 46/26/36/-4/0.00/0.0/.../..         16 SW  AERO 16 MPH SW  RMY N/A 11/22 46/38/42/+2/0.22/0.0/.../..         17 WSW AERO 18 MPH SW  RMY N/A 11/23 45/26/36/-3/0.00/0.0/.../..         40 WNW AERO 44 MPH WNW RMY 48 11/24 27/17/22/-17/0.00/0.0/.../..        53 NW  AERO 59 MPH NW  RMY 57   11/25  morning low temp: 14F; the normal low is now 31F   DAILY RECORDS FOR NOVEMBER 2013 None so far.   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   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   RECORDS FOR NOVEMBER 26 HIGH 66 IN 1979 LOW 6 IN 1938 PRECIP 2.22 INS IN 1888 SNOWFALL 3.0 INS IN 1974 PEAK GUST 78 SSE IN 1964   TODAY'S REPORT PREPARED BY: Robert Skilling