BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY TUESDAY, OCTOBER 20, 2015  ALL TIMES ARE IN EASTERN STANDARD TIME   MAJOR WARMING TREND AFTER COLDEST OF THE SEASON   Temperatures bottomed out at 26 degrees early yesterday but had risen to 60 degrees by noon today. The turn-around occurred last evening around 8 p.m. EDT when the low temperature for last night occurred. around 8 p.m. at 40 degrees. Rising temperatures did occur for the rest of last night and have continued into today.    Today's Observations:   7 A.M. Weather: Scattered altocumulus, overcast altocumulus, few altocumulus castellanus distant S-SSW, large break in overcast SE Temperature: 48F; Dew Point: 33F; Wind: SW at 13 kts, Sea-level pressure: 30.16 ins. Hg, about steady Visibility: 35 miles, 30 miles W-N, 40 miles NE-E 6-hr Max temp: 48F 6-hr Min temp: 44F 24-hr precip: 0.00 ins. BHO SA 1155 80 SCT E130 OVC 35 214/48/33/2213/016/ FEW ACC DSNT S-SSE LGE BINOVC SE DRK DSNT W-NNE VSBY W-N 30 NE-E 40 HZY XCPT NE-E/ 8/08/ 55001 10048 20044    10 A.M. Weather: Broken altocumulus of a chaotic sky, few altocumulus, castellanus, dense cirrus distant W, patches clear sky E-S-SW   Temperature: 58F; Dew Point 35F; Wind: SW at 12 kts, Sea-level pressure: 30.14 ins. Hg, falling then more rapidly Visibility: 35 miles, except 45 miles WNW, distant haze BHO SA 1455 E95 BKN 200 BKN 35 208/58/35/2212/014/ AC CHAOTIC PTCHS CLR SKY E-S-SW DNS CI DSNT W DSNT HZ VSBY WNW 45/ 8/092 56006   1 P.M. Weather: Broken altocumulus, clear sky band extending SE-SW  Temperature: 63F; Dew Point 37F; Wind: SW at 13G19 kts, Sea-level pressure: 30.10 ins. Hg, falling then more quickly Visibility: 55 miles, distant haze  BHO SA 1755 E110 BKN 55 193/63/37/2313G19/010/ CLR SKY BND SE-SW DSNT HZ/ 8/090 58015 10065 20048     SUMMARY FOR MONDAY, OCTOBER 19, 2015    TEMPERATURE (DEGREES F) MAX.....47   NORMAL.....59 MIN.....26   NORMAL.....42 MEAN....37   NORMAL.....50   DEPARTURE FROM 30-YEAR NORMAL......................-13 TOTAL DEPARTURE FOR THE MONTH......................-23  [-1.4 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..............28   DEPARTURE.........+13 TOTAL HEATING UNITS FOR THE MONTH.............238   DEPARTURE.........+17 TOTAL HEATING UNITS FOR THE SEASON............281   DEPARTURE.........-82 TOTAL HEATING UNITS LAST SEASON TO DATE.......261   DIFFERENCE........+20 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................25   SSW AT  11:20 P.M. *                    ASOS........................30   SSW AT   8:49 P.M.                      DAVIS.......................28   SW  AT   8:36 P.M. RMY 30 FASTEST MILE FOR YESTERDAY.....................22   SSW AT  11:23 P.M.   MAXIMUM 2-MINUTE ASOS AVERAGE..................22   SSW AT  11:23 P.M.     MAXIMUM 2-MINUTE DAVIS AVERAGE.................20   SSW  AT  8:47 P.M.    AVERAGE WIND SPEED AND DIRECTION.............12.0   NNW                    ASOS......................12.5                       DAVIS.....................10.4   W [280 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...........1.06  DEPARTURE.....-1.77                          ASOS...............1.04 TOTAL PRECIPITATION FOR THE YEAR...........35.20  DEPARTURE.....-6.71                           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/.../..               45 S   RMY 49 10/10 59/44/53/-2/0.00/.../..               33 NNW RMY N/A 10/11 67/46/57/+4/0.00/.../..               26 SW  RMY 28 10/12 76/50/63/+10/0.00/.../..              22 SSW RMY 24 10/13 70/55/63/+10/0.27/.../..              23 S   RMY 24 10/14 66/46/56/+4/0.00/.../..               26 W   RMY 29 10/15 60/41/51/-1/0.00/.../..               20 SW  RMY 27 10/16 60/44/52/+1/T/.../..                  31 W   RMY 34 10/17 54/35/45/-6/T/.../..                  30 WNW RMY 33 10/18 45/28/37/-14/0.00/.../..              24 NNW RMY 25 10/19 47/26/37/-13/0.00/.../..              25 SSW RMY 30    10/20 low since midnight is 43F; normal low is now 41F    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 20 HIGH 78F IN 1965,1984 LOW 24F IN 1972 PRECIP 7.10 INCHES IN 1996 (RECORD FOR MONTH) SNOWFALL TRACE IN 1934,1943 PEAK GUST 63 MPH W IN 1966   RECORDS FOR OCTOBER 21 HIGH 79F IN 1979 LOW 24F IN 1974 PRECIP 2.39 INCHES IN 1944 SNOWFALL TRACE IN 1895,1907,1940 PEAK GUST 69e MPH S IN 1976   TODAY'S REPORT PREPARED BY: Robert Skilling