Friday, October 18, 2013

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, OCTOBER 18, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME

MILD AND WINDY OCTOBER DAY
BRIEF RAIN SHOWER OVERNIGHT

Temperatures have once again risen into the mid 60s which will
mark the 22nd consecutive day (starting back on Sept. 27th) that
our average daily temperatures have all been at or above normal which
included 5 days which averaged right on the normal.  This also means
that there have been no cooler than average days extending back 3-weeks.

Aside from the warm temperatures, winds have been fairly gusty out of the
west today with an average of about 15 mph so far, and a high gust of 32 mph.
Dew points have also fallen into the mid to upper 40s providing for dry
conditions. There was a brief shower associated with a passing cold front
just before midnight leaving us with 0.06 inch. Our dry month continues, as
we still remain 1.54″ below average. Visibility has been excellent today as well,
with Grand Monadnock visible out to our northwest, partially thanks to the low
humidity.

Today’s Observations:

7 A.M.
Weather: Clear, with cumulus bands distant offshore all quadrants
except N-NNE, light distant haze, thin smoke layer N-NNE.
Temperature: 59F; Dew Point: 55F; Wind: W at 13 kts
Sea-level pressure: 29.69 ins. Hg, steady then increasing
Visibility: 50 miles, light distant haze, thin smoke layer N-NNE
6-hr min temp: 56F
24-hour precip: 0.06 inch
BHO SA 1155 CLR 50 055/59/55/2813/969/ CU BANDS DSNT OFFSHR ALQDS XCPT
N-NNE LGT DSNT HZ THN K LYR N-NNE/ 8/200 53015 MANUAL 70006
ASOS 70006 10061 20056

10 A.M.
Weather: Scattered cumulus, very light distant haze
Temperature: 63F; Dew Point: 49F; Wind: W at 15G21 kts
Wind: Peak wind 28 kts W @ 9:40 AM
Sea-level pressure: 29.75 ins. Hg, increasing
Visibility: 70 miles, very light distant haze
BHO SA 1455 35 SCT 70 076/63/49/2715G21/975/ VRY LGT DSNT HZ
PK WND 2728/40/ 8/200 51021

1 P.M.
Weather: Scattered cumulus
Temperature: 66F; Dew Point: 46F; Wind: W at 14 kts
Sea-level pressure: 29.77 ins. Hg, increasing slowly
Visibility: 75 miles
6-hr max temp:  66F
BHO SA 1755 50 SCT 75 082/66/46/2714/977/ 8/200 51006 10066 20059

WEATHER SUMMARY FOR THURSDAY, OCTOBER 17, 2013

TEMPERATURE (DEGREES F)
MAX…..70    NORMAL…..60
MIN…..52    NORMAL…..42
MEAN….61    NORMAL…..51

DEPARTURE FROM 30-YEAR NORMAL…………………+10
TOTAL DEPARTURE FOR THE MONTH…………………+84  [+4.7 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0   DEPARTURE……….0
TOTAL COOLING UNITS FOR THE MONTH…………..5   DEPARTURE……….0
TOTAL COOLING UNITS FOR THE SEASON………..701   DEPARTURE……..+99
TOTAL COOLING UNITS LAST SEASON TO DATE……767   DIFFERENCE…….-66

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………4  DEPARTURE……..-10
TOTAL HEATING UNITS FOR THE MONTH………….107  DEPARTURE……..-85
TOTAL HEATING UNITS FOR THE SEASON…………253  DEPARTURE……..-81
TOTAL HEATING UNITS LAST SEASON TO DATE…….279  DIFFERENCE…….-26

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………21 S   AT  11:02 P.M. *
AERO…………………..23 S   AT  10:44 P.M.
ASOS…………………..23 S   AT  11:02 P.M.
DAVIS………………….21 SSW AT   5:18 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..16 S   AT  11:07 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..16 S   AT  11:03 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….16 S   AT  10:39 P.M.
AVERAGE WIND SPEED AND DIRECTION………….10.8 SSW
ASOS………………….10.7
DAVIS…………………9.7 SW [215 degrees] * last of several occurrences….

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.06   DEPARTURE………….-0.09
ASOS…………..0.06
TOTAL PRECIPITATION FOR THE MONTH……….0.98   DEPARTURE………….-1.54
ASOS…………..0.97
TOTAL PRECIPITATION FOR THE YEAR……….42.90   DEPARTURE………….+1.30
ASOS…………..N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized

10/1  75/50/63/+6/0.00/676/96         16 WNW AERO 16 MPH WNW RMY 18
10/2  78/56/67/+10/0.00/666/95        29 W   AERO 30 MPH W   RMY 29
10/3  77/56/67/+11/0.00/628/90        20 WNW AERO 20 MPH WNW RMY N/A
10/4  67/56/62/+6/0.26/028/04         18 NW  AERO 20 MPH NW  RMY N/A
10/5  67/56/62/+6/0.01/125/18         14 ENE AERO 12 MPH ENE RMY N/A
10/6  58/53/56/+1/0.56/000/00         20 NE  AERO 20 MPH NE  RMY N/A
10/7  75/57/66/+11/0.07/213/31        48 S   AERO 55 MPH S   RMY 55
10/8  65/50/58/+4/0.00/581/85         25 NW  AERO 27 MPH NW  RMY 28
10/9  59/49/54/0/0.00/545/80          25 ENE AERO 24 MPH ENE RMY 25
10/10 61/46/54/0/0.00/095/14          18 NE  AERO 17 MPH NE  RMY 18
10/11 67/50/59/+6/0.00/473/70         20 NE  AERO 20 MPH NE  RMY N/A
10/12 59/50/55/+2/0.02/007/01         30 ENE AER0 31 MPH ENE RMY 32
10/13 59/46/53/0/0.00/482/72          23 ENE AERO 23 MPH ENE RMY 23
10/14 64/42/53/+1/0.00/580/87         15 SSW AERO 15 MPH SSW RMY 15
10/15 66/50/58/+6/0.00/266/40         16 ESE AERO 16 MPH ESE RMY N/A
10/16 60/49/55/+4/0.00/013/02         23 ESE AERO 24 MPH ESE RMY 23
10/17 70/52/61/+10/0.06/…/..        21 S   AERO 23 MPH S   RMY N/A

10/18 the morning low temp: 59F; the normal low is now 42F

DAILY RECORDS FOR OCTOBER 2013
None so far.

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR OCTOBER 18
HIGH 82F IN 1908
LOW 26F IN 1939
PRECIP 2.79 INCHES IN 1975
SNOWFALL 3.0 INCHES IN 2009
PEAK GUST 66 MPH S IN 1967

RECORDS FOR OCTOBER 19
HIGH 81F IN 1945
LOW 21F IN 1922
PRECIP 3.64 INCHES IN 1932
SNOWFALL 1.0 INCHES IN 1972
PEAK GUST 66 MPH SSW IN 1967

TODAY’S REPORT PREPARED BY: George Tabeek