BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, OCTOBER 23, 2015   ALL TIMES ARE IN EASTERN STANDARD TIME COLD FRONT MOVES THROUGH, TEMPS DROP AS  WINDS GUST FROM THE NW  Following the passage of a cold front last yesterday afternoon, temperatures dropped steadily overnight with today's maximum reading likely occurring near midnight. Gusty winds from the NW have made already chilly conditions feel colder with winds gusting regularly in the 30 MPH range. Excellent visibility has continued throughout the day, with a station maximum of 90 miles observed at this morning's 7:00 AM EST observation. By the 1:00 PM EST observation skies were mostly cloudy with broken stratocumulus and visibility of 75 miles in all directions. Temperatures were holding steady in the mid 40s.     Today's Observations: 7 A.M. Weather: Broken stratocumulus Temperature: 47F; Dew Point: 37F; Wind: NW at 10 kts, Sea-level pressure: 30.12 ins. Hg, rising, then more quickly Visibility: 90 miles, except 75 miles NNW  6-hr Max temp: 52F  6-hr Min temp: 45F 24-hr precip: Trace  BHO SA 1155 E50 BKN 90 201/47/37/3210/012/  VSBY NNW 75 MI/ 8/500 53021 10052 20045   10 A.M. Weather: Clear, few stratocumulus/cumulus in all directions Temperature: 46F; Dew Point 26F; Wind: NNW at 20G25 kts, Peak Wind: 27 knots NW @ 9:43 AM EST  Sea-level pressure: 30.18 ins. Hg, rising, then more slowly   Visibility: 80 miles   BHO SA 1455 CLR 80 221/46/26/3320G25/018/  FEW SC/CU ALQDS PK WND 3227/43/ 8/500 51020  1 P.M. Weather: Broken stratocumulus Temperature: 45F; Dew Point 28F; Wind: NNW at 14G21 kts, Peak Wind: 25 knots NNW at 12:00 PM EST  Sea-level pressure: 30.19 ins. Hg, rising, then more quickly Visibility: 75 miles    6-hr Max temp: 49F  6-hr Min temp: 44F  BHO SA 1755 E50 BKN 75 224/45/28/3414G21/019/  PK WND 3425/00/ 8/500 53003 10049 20044   SUMMARY FOR THURSDAY, OCTOBER 22, 2015     TEMPERATURE (DEGREES F) MAX.....71   NORMAL.....58  MIN.....51   NORMAL.....41  MEAN....61   NORMAL.....49    DEPARTURE FROM 30-YEAR NORMAL......................+12 TOTAL DEPARTURE FOR THE MONTH.......................-2  [-0.3 DEGREES/DAY]   COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY...............0   DEPARTURE...........0 TOTAL COOLING UNITS FOR THE MONTH...............0   DEPARTURE..........-5 TOTAL COOLING UNITS FOR THE SEASON............810   DEPARTURE........+208 TOTAL COOLING UNITS LAST SEASON TO DATE.......595   DIFFERENCE.......+215 HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY...............4   DEPARTURE.........-12 TOTAL HEATING UNITS FOR THE MONTH.............263   DEPARTURE..........-4 TOTAL HEATING UNITS FOR THE SEASON............306   DEPARTURE........-103 TOTAL HEATING UNITS LAST SEASON TO DATE.......305   DIFFERENCE.........+1   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................31  W   AT 10:17 P.M.*                      ASOS........................35  W   AT 10:18 P.M.                        DAVIS.......................32  SW  AT  2:17 P.M. RMY 34 FASTEST MILE FOR YESTERDAY.....................26  SSW AT  2:32 P.M.    MAXIMUM 2-MINUTE ASOS AVERAGE..................25  SSW AT  2:33 P.M.       MAXIMUM 2-MINUTE DAVIS AVERAGE.................26  SSW AT  2:32 P.M.      AVERAGE WIND SPEED AND DIRECTION..............14.6 SSW                      ASOS.......................14.4                        DAVIS......................13.3 SW [216 Deg.]  PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....TRACE  DEPARTURE.....-0.16                          ASOS...............0.00 TOTAL PRECIPITATION FOR THE MONTH...........1.07  DEPARTURE.....-2.22                          ASOS...............1.05 TOTAL PRECIPITATION FOR THE YEAR...........35.21  DEPARTURE.....-7.16                            ASOS................N/A *** *** ASOS annual total not available due to erroneous readings PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA   DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY GUST RMY:  R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 10/1  55/51/53/-4/..../000/00               39 NE  RMY N/A 10/2  51/47/49/-8/..../000/00               40 NE  RMY 43  10/3  51/45/48/-8/..../000/00               38 NE  RMY N/A  10/4  55/49/52/-4/0.00/474/68               35 E   RMY 40 10/5  59/46/53/-3/T/125/18                  21 NE  RMY 20  10/6  68/43/56/+1/0.00/663/96               17 NW  RMY 17 10/7  69/46/58/+3/0.00/640/93               20 W   RMY 20 10/8  63/49/56/+2/0.00/678/99               21 S   RMY N/A 10/9  68/50/59/+5/0.27/130/19               45 S   RMY 49 10/10 59/44/53/-2/0.00/673/99               33 NNW RMY N/A  10/11 67/46/57/+4/0.00/582/86               26 SW  RMY 28 10/12 76/50/63/+10/0.00/647/96              22 SSW RMY 24 10/13 70/55/63/+10/0.27/208/31              23 S   RMY 24 10/14 66/46/56/+4/0.00/428/64               26 W   RMY 29 10/15 60/41/51/-1/0.00/659/99               20 SW  RMY 27 10/16 60/44/52/+1/T/471/71                  31 W   RMY 34 10/17 54/35/45/-6/T/482/73                  30 WNW RMY 33 10/18 45/28/37/-14/0.00/480/73              24 NNW RMY 25 10/19 47/26/37/-13/0.00/648/99              25 SSW RMY 30   10/20 65/43/54/+4/0.00/.../..               28 SW  RMY 28 10/21 59/51/55/+5/0.01/.../..               18 SSE RMY 21   10/22 71/51/61/+12/T/.../..                 31 W   RMY 34 10/23 low since midnight is 45F; normal low is now 40F   DAILY RECORDS FOR OCTOBER 2015 -NONE SO FAR. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 23 HIGH 82F IN 1947 LOW 24F IN 1969 PRECIP 3.66 INCHES IN 2014 SNOWFALL 3.0 INCHES IN 1891 PEAK GUST 78e MPH NW IN 1941 RECORDS FOR OCTOBER 24 HIGH 79F IN 1963 LOW 22F IN 1969 PRECIP 2.96 INCHES IN 1890 SNOWFALL 1.8 INCHES IN 1960 PEAK GUST 70 MPH SE IN 1959 TODAY'S REPORT PREPARED BY: Brian Fitzgerald