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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, OCTOBER 13, 2014 COLUMBUS DAY   
ALL TIMES ARE IN EASTERN STANDARD TIME

COOL AND CLEAR START TO THE DAY GIVES WAY 
TO OVERCAST CONDITIONS

Another inversion was present this morning due to
radiational cooling, with patches of thin valley fog
visible below the summit at the 7:00 AM EST observation.
Thicker patches of fog enveloped both Houghton's Pond
and Ponkapoag, before dissipating shortly thereafter. 

A couple layers of altocumulus, then altostratus, invaded
by mid morning, creating overcast conditions and limiting
visibility. Winds have shifted overnight as well from a 
more northerly flow yesterday afternoon to SSW
by mid morning today.


Today's Observations:

7 A.M.
Weather: Broken altocumulus, broken cirrus fibratus,
few altocumulus distant ESE-W, patches of fog over ponds
and dissipating SE, thin fog below inversion ESE-WNW
Temperature: 48F; Dew Point: 42F; Wind: WSW at 9 kts
Sea-level pressure: 30.37 ins. Hg, steady, then rising         
Visibility: 60 miles, expect SE-ESE 40 miles obscured
by thin fog below inversion
6-hr max temp: 48F 
6-hr min temp: 45F 
24-hr precip: 0.00 inches
BHO SA 1155 E170 BKN 250 BKN 60 285/48/42/2509/037/ 
VSBY SE-ESE 40 MI FEW AC DSNT ESE-W PTCHS FG OVR PNDS SE DSPTNG 
THN FG BLO INVSN ESE-WNW/ 8/071 53010 10048 20045
 
10 A.M.   
Weather: Broken altostratus, broken cirrus fibratus,
few cumulus distant ESE-SSW
Temperature: 55F; Dew Point: 43F; Wind: estimated S at 6 kts,
Wind Speed: Light 
Sea-level pressure: 30.38 ins. Hg, rising, then steady  
Visibility: 60 miles, expect SW-WNW, light distant fog
below summit
BHO SA 1455 E140 BKN E250 BKN 60 288/55/43/E1706/038/ VSBY SW-WNW 50 
MI LGT DSNT FG BLO SMT SW-WNW FEW CU DSNT ESE-SSW/ 8/121 51003

1 P.M.
Weather: Overcast altostratus undulatus, few cumulus invading ENE-W
Temperature: 61F; Dew Point: 48F; Wind: SSW at 10 kts,
Sea-level pressure: 30.33 ins. Hg, steady, then falling 
Visibility: 50 miles, light distant haze
6-hr max temp: 61F 
6-hr min temp: 48F
6-hr precip: 0.00 inches 
BHO SA 1755 E34 OVC 50 271/61/48/2110/033/ FEW CU INVDNG ENE-W 
LGT DSNT HZ ALQDS/ 8/12/ 58017 10061 20048


WEATHER SUMMARY FOR SUNDAY, OCTOBER 12, 2014  

TEMPERATURE (DEGREES F)
MAX.....60    NORMAL.....62
MIN.....40    NORMAL.....44
MEAN....50    NORMAL.....53

DEPARTURE FROM 30-YEAR NORMAL.........................-3
TOTAL DEPARTURE FOR THE MONTH.........................-6 [-0.3 DEGREE/DAY] 

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............15  DEPARTURE...........+3
TOTAL HEATING UNITS FOR THE MONTH.............126  DEPARTURE...........+1     
TOTAL HEATING UNITS FOR THE SEASON............227  DEPARTURE..........-40
TOTAL HEATING UNITS LAST SEASON TO DATE.......208  DIFFERENCE.........+19

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY..................20 NW  AT  1:06 A.M.     
                   ASOS.......................20 NW  AT  1:06 A.M.   
                   DAVIS......................19 WNW AT 12:56 A.M. RMY N/A 
FASTEST MILE FOR YESTERDAY....................14 NNW AT  2:35 A.M. 
MAXIMUM 2-MINUTE ASOS AVERAGE.................15 NNW AT  2:34 P.M.                
MAXIMUM 2-MINUTE DAVIS AVERAGE................15 SSE AT  7:01 A.M.                                  
AVERAGE WIND SPEED AND DIRECTION.............9.7 NNW 				
                   ASOS......................9.9  
                   DAVIS.....................8.3 NW (310 degrees)  
* Last of several occurrences  
                
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..........2.64  DEPARTURE........+0.86     
                         ASOS..............2.64  
TOTAL PRECIPITATION FOR THE YEAR..........34.23  DEPARTURE........-6.63
                         ASOS.............34.44

 
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  56/55/56/-1/1.63/000/00              33 NE  RMY 36 
10/2  55/47/51/-6/0.29/000/00              30 NE  RMY N/A   
10/3  54/46/50/-6/0.05/000/00              20 NE  RMY 20
10/4  63/52/58/+2/0.30/000/00              30 SE  RMY 32
10/5  60/45/53/-3/0.00/.../..              26 W   RMY 28
10/6  66/42/54/-1/0.00/.../..              25 SSE RMY N/A
10/7  72/54/63/+8/0.01/.../..              43 S   RMY 49
10/8  72/53/63/+9/0.01/.../..              40 S   RMY N/A
10/9  64/48/56/+2/0.00/.../..              35 W   RMY 39 
10/10 63/43/53/-1/0.00/.../..              23 W   RMY N/A
10/11 50/43/47/-6/0.35/.../..              15 N   RMY N/A
10/12 60/40/50/-3/0.00/.../..              20 NW  RMY N/A

10/13 morning low temp: 45F since midnight; normal low now 44F

 
DAILY RECORDS FOR OCTOBER 2014:
10/1 - A NEW RECORD DAILY PRECIPITATION OF 1.63 INCHES;  
       surpasses the previous record of 1.44 ins. in 1984 
       
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