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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, OCTOBER 13, 2015  
ALL TIMES ARE IN EASTERN STANDARD TIME

RAIN SHOWERS MOVE THROUGH THIS MORNING,
TOTALING 0.27 INCHES 

Unseasonable warmth on Monday brought temperatures to 
a maximum reading of 76F by 2:30 PM EST yesterday afternoon.
Yesterday's daily departure of +10 degrees along with a second
a warm second week of October have brought monthly temperatures
back to near normal after a cooler than normal start to the month.
Forecasts for the second half of this week indicate a return
to cooler than normal temperatures may well be on the way.

Rain showers that began this morning dropped 0.11 inches by the
7:00 AM EST observation, and an additional 0.15 inches by the
10:00 AM EST observation.

By the 1:00 PM EST observation another 0.01 inches of new
precipitation was recorded before rain ended just after 10:00 AM
EST this morning. Skies were somewhat chaotic with cumulus,
cumulus fractus, altocumulus and cirrocumulus covering most
of the sky. Sunshine and a continued SSW flow allowed for
a maximum temperature so far of 69F.
 

Today's Observations:

7 A.M.
Weather: Rain ending at 6:35 AM EST, thick fog
Temperature: 60F; Dew Point: 60F; Wind: E at 7 kts,
Sea-level pressure: 29.62 ins. Hg, falling steadily
Visibility: 1/16 of a mile, thick fog
6-hr Max temp: 60F  
6-hr Min temp: 55F
24-hr precip: 0.11 ins.
BHO SA 1155 W2 1/16F 032/60/60/1007/962/ RE35/ 
8//// 57021 ASOS 60010 70010 MANUAL 60011 70011 10060 20055

10 A.M.
Weather: Broken stratocumulus, overcast altostratus, showers
in the vicinty SE-SW, patchs of dense fog in all directions
below summit
Temperature: 63F; Dew Point 62F; Wind: estimated SSW at 2 kts,
Wind Speed: Light 
Sea-level pressure: 29.59 ins. Hg, falling, then more quickly 
Visibility: 15 miles, except 1/2 of a mile E-ESE and SSW,
patches of dense fog in all directions below summit 
3-hr precip: 0.15 ins.
BHO SA 1455 -X E16 BKN 70 OVC 15F 022/63/62/E2102/959/ 
VSBY E-ESE AND SSW 1/2 MI VCNTY SHWRS SE-SW PTCHS DENSE F ALQDS 
BLO SMT WND LGT/ 8/52/ 58010 ASOS 60015 MANUAL 60015

1 P.M.
Weather: Scattered altocumulus, broken cirrocumulus,
few cumulus/cumulus fractus in all directions
Temperature: 69F; Dew Point 61F; Wind: SSW at 10 kts,
Sea-level pressure: 29.55 ins. Hg, falling, then more slowly
Visibility: 40 miles, thin fog 
6-hr Max temp: 69F
6-hr Min temp: 57F
6-hr precip: 0.16 ins.
BHO SA 1755 110 SCT E250 BKN 40 008/69/61/2110/955/ FEW CU/CUFRA 
ALQDS THN FG ALQDS/ 8/739 56014 ASOS 60016 MANUAL 60016 10069 20057


SUMMARY FOR MONDAY, OCTOBER 12, 2015 
  
TEMPERATURE (DEGREES F)
MAX.....76   NORMAL.....62 
MIN.....50   NORMAL.....44 
MEAN....63   NORMAL.....53 
 
DEPARTURE FROM 30-YEAR NORMAL.......................+10
TOTAL DEPARTURE FOR THE MONTH........................-4  [-0.5 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..........-2
TOTAL COOLING UNITS FOR THE SEASON............810   DEPARTURE........+211
TOTAL COOLING UNITS LAST SEASON TO DATE.......587   DIFFERENCE.......+223

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............2   DEPARTURE.........-10
TOTAL HEATING UNITS FOR THE MONTH.............123   DEPARTURE..........-2
TOTAL HEATING UNITS FOR THE SEASON............166   DEPARTURE........-101
TOTAL HEATING UNITS LAST SEASON TO DATE.......227   DIFFERENCE........-61
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................22 SSW  AT  6:58 P.M. 
                   ASOS........................24 S    AT  6:58 P.M.  
                   DAVIS.......................23 SSW  AT  6:57 P.M. RMY 24
FASTEST MILE FOR YESTERDAY.................... 17 SSW  AT  6:55 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE..................17 S    AT  7:59 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE.................16 SSW  AT  6:58 P.M.   
AVERAGE WIND SPEED AND DIRECTION..............11.3 SSW 
                   ASOS.......................11.5    
                   DAVIS......................10.3 SW [220 DEG] 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.11  DEPARTURE.....-0.04
                         ASOS...............0.10
TOTAL PRECIPITATION FOR THE MONTH...........0.90  DEPARTURE.....-0.88
                         ASOS...............0.88
TOTAL PRECIPITATION FOR THE YEAR...........34.30  DEPARTURE.....-5.82
                         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/..../.../..               39 NE  RMY N/A
10/2  51/47/49/-8/..../.../..               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/.../..               35 E   RMY 40
10/5  59/46/53/-3/T/.../..                  21 NE  RMY 20 
10/6  68/43/56/+1/0.00/.../..               17 NW  RMY 17
10/7  69/46/58/+3/0.00/.../..               20 W   RMY 20
10/8  63/49/56/+2/0.00/.../..               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 low since midnight is 55F; normal low is now 44F  

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 13
HIGH 84F IN 1930,1954
LOW 29F IN 2012
PRECIP 5.92 INCHES IN 1895
SNOWFALL 4.2 INCHES IN 1934
PEAK GUST 46e MPH W IN 1950

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

TODAY'S REPORT PREPARED BY: Brian Fitzgerald