BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, OCTOBER 14, 2015  
ALL TIMES ARE IN EASTERN STANDARD TIME

CLEAR, WARM CONDITIONS PREVAIL 
FOLLOWING YESTERDAY'S RAINFALL

Following yesterday's rain of 0.27 inches, temperatures
were able to reach a peak of 70F, some 9 degrees warmer
than normal. With a southerly, then westerly flow, a 
warmer than normal air mass has remained in place ahead
of a potential first frost/freeze this weekend. Monthly
temperatures are now averaging slightly warmer than
normal at 0.3 degrees above normal per day through yesterday.

Dense cirrus and some virga was visible this morning, and
by the 1:00 PM EST observation virga was visible in all directions
with layers of altocumulus lenticularis and dense cirrus
constantly moving and changing shape. Visibility had improved
to 70 miles in all directions and temperatures may have
well hit their maximum for the day already at 66F.
 

Today's Observations:

7 A.M.
Weather: Scattered cirrus, dense cirrus SW-W, 
few cumulus distant NW, few altocumulus lenticularis 
distant W-N
Temperature: 54F; Dew Point: 49F; Wind: WSW at 11 kts,
Sea-level pressure: 29.66 ins. Hg, rising, then more quickly
Visibility: 40 miles, thin fog in all directions
6-hr Max temp: 58F  
6-hr Min temp: 53F
24-hr precip: 0.16 ins.
BHO SA 1155 200 SCT 40 043/54/49/2411/966/ 
FEW CU DSNT NW FEW ACSL DSNT W-N DNS CI SW-W THN FG ALQDS/ 
8/144 53016 ASOS 70017 MANUAL 70016 10058 20053

10 A.M.
Weather: Scattered dense cirrus with anvil tops, few
small cumulus SE-NE
Temperature: 63F; Dew Point 48F; Wind: W at 13G18 kts, 
Sea-level pressure: 29.68 ins. Hg, rising, then more slowly
Visibility: 60 miles, light distant haze
BHO SA 1455 200 SCT 60 052/63/48/2713G18/968/ 
FEW SML CU SE-NE LGT DSNT HZ ALQDS/ 8/103 51009

1 P.M.
Weather: Scattered stratocumulus, broken altocumulus,
broken dense cirrus, virga in all directions, altocumulus
lenticularis in all directions
Temperature: 64F; Dew Point 47F; Wind: WSW at 12G18 kts,
Sea-level pressure: 29.67 ins. Hg, steady, then falling
Visibility: 70 miles 
6-hr Max temp: 66F
6-hr Min temp: 54F
BHO SA 1755 40 SCT E160 BKN 250 BKN 70 048/64/47/2512G18/967/ 
VIRGA ALQDS ACSL ALQDS/ 8/444 58004 10066 20054


SUMMARY FOR TUESDAY, OCTOBER 13, 2015 
  
TEMPERATURE (DEGREES F)
MAX.....70   NORMAL.....61 
MIN.....55   NORMAL.....44 
MEAN....63   NORMAL.....53 
 
DEPARTURE FROM 30-YEAR NORMAL.......................+10
TOTAL DEPARTURE FOR THE MONTH........................+6  [+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..........-4
TOTAL COOLING UNITS FOR THE SEASON............810   DEPARTURE........+209
TOTAL COOLING UNITS LAST SEASON TO DATE.......587   DIFFERENCE.......+223

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............2   DEPARTURE.........-11
TOTAL HEATING UNITS FOR THE MONTH.............125   DEPARTURE.........-13
TOTAL HEATING UNITS FOR THE SEASON............168   DEPARTURE........-112
TOTAL HEATING UNITS LAST SEASON TO DATE.......239   DIFFERENCE........-71
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................23 S    AT  3:25 P.M. 
                   ASOS........................25 S    AT  3:26 P.M.  
                   DAVIS.......................23 S    AT  3:25 P.M. RMY 24
FASTEST MILE FOR YESTERDAY.................... 18 SSW  AT  4:58 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE..................20 S    AT  4:59 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE.................19 SSW  AT  4:59 P.M.   
AVERAGE WIND SPEED AND DIRECTION..............10.8 SSW 
                   ASOS.......................11.4    
                   DAVIS......................10.1 SSW [208 DEG] 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.16  DEPARTURE.....+0.01
                         ASOS...............0.16
TOTAL PRECIPITATION FOR THE MONTH...........1.06  DEPARTURE.....-0.87
                         ASOS...............1.04
TOTAL PRECIPITATION FOR THE YEAR...........34.46  DEPARTURE.....-5.81
                         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 low since midnight is 53F; normal low is now 43F  

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 14
HIGH 79F IN 2000
LOW 28F IN 1958
PRECIP 2.69 INCHES IN 1990
SNOWFALL 2.0 INCHES IN 1913
PEAK GUST 63e W IN 1976

RECORDS FOR OCTOBER 15
HIGH 83F IN 1897
LOW 29F IN 1887,1937
PRECIP 4.58 INCHES IN 2005
SNOWFALL TRACE IN 1961,1972
PEAK GUST 69 MPH W IN 2003

TODAY'S REPORT PREPARED BY: Brian Fitzgerald