Sunday, October 12, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 12, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

CHILLY SATURDAY GIVES WAY TO CLEARING AND
COLDEST READINGS OF THE SEASON THUS FAR

0.35 inches of rain fell between midnight to midnight
yesterday, falling moderately to heavily during the mid
morning. Rainfall for the month of October is up to
2.64 inches so far, with a departure of +1.01 inches.

At the 7:00 AM EST observation a current temperature
and minimum reading of 39.8F was recorded while Norwood
Memorial Airport recorded 27F close by. 40F surpassed
42F, as our coldest reading so far this season.

Today’s Observations:

7 A.M.
Weather: Clear, patches of valley fog S-NNW, few cumulus
distant offshore E-SE, few cirrus fibratus
Temperature: 41F; Dew Point: 38F; Wind: NNW at 9 kts
Sea-level pressure: 30.25 ins. Hg, rising
Visibility: 70 miles
6-hr max temp: 43F
6-hr min temp: 40F
24-hr precip: 0.35 inches
BHO SA 1155 CLR 70 243/41/38/3309/025/ PTCHS VLY FG S-NNW
FEW CU DSNT OFFSHR E-SE FEW CI DSNT ESE-SW THN FG BLO SMT ALQDS/
8/101 53023 ASOS 70035 MANUAL 70035 10043 20040

10 A.M.
Weather: Few cumulus distant offshore SE and WNW-NW,
few cirrus distant ESE-SW
Temperature: 53F; Dew Point: 38F; Wind: N at 7 kts,
Sea-level pressure: 30.29 ins. Hg, rising then more slowly
Visibility: 70 miles
BHO SA 1455 CLR 70 257/53/38/0107/029/ FEW CU DSNT OFFSHR SE AND
WNW-NW FEW CI DSNT ESE-SW/ 8/101 51014

1 P.M.
Weather: Few small cumulus in all directions
Temperature: 59F; Dew Point: 37F; Wind: estimated NNW at 6 kts,
Wind Speed: Light
Sea-level pressure: 30.26 ins. Hg, falling, then more quickly
Visibility: 70 miles
6-hr max temp: 59F
6-hr min temp: 41F
6-hr precip: 0.00 inches
BHO SA 1755 70 246/59/37/E3306/026/ FEW SML CU ALQDS/
8/100 58011 10059 20041

WEATHER SUMMARY FOR SATURDAY, OCTOBER 11, 2014

TEMPERATURE (DEGREES F)
MAX…..50    NORMAL…..62
MIN…..43    NORMAL…..45
MEAN….47    NORMAL…..53

DEPARTURE FROM 30-YEAR NORMAL…………………….-6
TOTAL DEPARTURE FOR THE MONTH…………………….-3 [-0.1 DEGREE/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..18  DEPARTURE………..+6
TOTAL HEATING UNITS FOR THE MONTH………….111  DEPARTURE………..-2
TOTAL HEATING UNITS FOR THE SEASON…………212  DEPARTURE……….-43
TOTAL HEATING UNITS LAST SEASON TO DATE…….198  DIFFERENCE………+14

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………15 N   AT 10:32 A.M.
ASOS…………………..16 N   AT 11:32 A.M.
DAVIS………………….15 WNW AT 10:01 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..12 WNW AT 11:51 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..12 WNW AT 11:58 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….11 WNW AT 10:56 A.M.
AVERAGE WIND SPEED AND DIRECTION………….7.4 N
ASOS………………….8.1
DAVIS…………………6.4 N (349 degrees)
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.35  DEPARTURE……..+0.20
ASOS…………..0.35
TOTAL PRECIPITATION FOR THE MONTH……….2.64  DEPARTURE……..+1.01
ASOS…………..2.64
TOTAL PRECIPITATION FOR THE YEAR……….34.23  DEPARTURE……..-6.48
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 morning low temp: 40F 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 12
HIGH 87F IN 1954
LOW 31F IN 1906
PRECIP 1.53 INCHES IN 1948
SNOWFALL TRACE IN 1941
PEAK GUST 55 MPH NW IN 1963

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

TODAY’S REPORT PREPARED BY: Brian Fitzgerald