Sunday, October 11, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, OCTOBER 11, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

OCTOBER TEMPS. CONTINUE ABOUT 2 DEGREES BELOW NORMAL
TEMPERATURES SATURDAY FELL A COUPLE DEGREES ON COOL SIDE
MONTHLY PRECIPITATION TOTAL STILL BELOW NORMAL

The high temperature of 59F yesterday fell several
degrees cooler than normal and the day average degrees
below normal. The month is running 2 degrees cooler
than normal and 6 out of 10 days have been slightly
cooler than normal.
Precipitation for the month is still well short of one
inch and running close to 3/4 of an inch on the dry side.

Today’s Observations:

7 A.M.
Weather:  Thin broken cirrus at 2 levels, few altocumulus and
altocumulus lenticularis distant WNW-NNW and distant E
Temperature: 49F; Dew Point: 45F; Wind: SW at 13 kts,
Sea-level pressure: 30.06 ins. Hg, rising, then more slowly
Visibility: 30 miles, except 40 miles NE, light distant fog/haze
6-hr Max temp: 49F
6-hr Min temp: 46F
BHO SA 1155 250 -BKN 300 -BKN 30 156/49/45/2213/990/ FEW AC/ACSL
DSNT WNW-NNW AND E THN FG/HZ DSNT XCPT NE VSBY NE 40/
8/041 50002 10049 20046

10 A.M.
Weather: Scattered dense cirrus, thin broken cirrus,
few small cumulus distant SE-SW, few patches altocumulus and
altocumulus lenticularis (distant NW-NNE, dense cirrus NNE-SSE
Temperature: 58F; Dew Point 45F; Wind: SW at 15 kts,
Sea-level pressure: 29.96 ins. Hg, falling then more rapidly
Visibility: 60 miles, 70 miles NW, light distant haze
BHO SA 1455 220 SCT 250 –BKN 60 147/58/45/2215/996/ FEW SML CUFRA/CU
DSNT SE-SW FEW AC/ACSL DSNT WNW-NNE PTCHS DNS CI  NNE-SE VSBY NW 70
LGT DSNT HZ/ 8/142 58009

SUMMARY FOR SATURDAY, OCTOBER 10, 2015

TEMPERATURE (DEGREES F)
MAX…..59   NORMAL…..62
MIN…..44   NORMAL…..45
MEAN….52   NORMAL…..54

DEPARTURE FROM 30-YEAR NORMAL……………………-2
TOTAL DEPARTURE FOR THE MONTH…………………..-18  [-2.0 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…………..12   DEPARTURE………..0
TOTAL HEATING UNITS FOR THE MONTH………….113   DEPARTURE………+13
TOTAL HEATING UNITS FOR THE SEASON…………156   DEPARTURE………-87
TOTAL HEATING UNITS LAST SEASON TO DATE…….194   DIFFERENCE……..-38

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….33 NNW  AT 12:52 A.M.
ASOS……………………37 NNW  AT  1:27 A.M.
DAVIS…………………..33  N   AT 12:52 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY……………….. 23 NNW  AT 12:54 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………23 NNW  AT 12:53 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..22  N   AT 12:43 A.M. .
AVERAGE WIND SPEED AND DIRECTION…………..10.1 NNW
ASOS…………………..10.2
DAVIS…………………..8.8 NW [320 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………..0.79  DEPARTURE…..-0.69
ASOS……………0.78
TOTAL PRECIPITATION FOR THE YEAR………..34.19  DEPARTURE…..-5.63
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 low since midnight is 46F; normal low is now 45F

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 11
HIGH 80F IN 1919,1949
LOW 28F IN 1993
PRECIP 0.96 INCHES IN 1903
SNOWFALL (NONE)
PEAK GUST 66e MPH WNW IN 1941

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

TODAY’S REPORT PREPARED BY: Robert Skilling