Friday, November 8, 2013

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, NOVEMBER 8, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME

YESTERDAY’S VERY BENEFICIAL RAINFALL REACHES TOTAL OF 0.31 INCH;
MUCH COOLER TODAY, CONTINUED BREEZY;
PLENTY OF CLOUDS DEVELOP BY LATE MORNING WITH A BRIEF SHOWER THIS AFTERNOON

Light, steady rain that began yesterday morning and lasted into the evening
totaled 0.31 inch of very beneficial rainfall. This was the most substantial
rainfall since 0.56 in fell way back on October 6.

A cold front swept through the area late yesterday morning, and the
temperature dropped steadily from the 60s down to the morning low today of
31F. Temperatures are about 15-20 degrees cooler than yesterday. Plenty
of clouds and even a few isolated light showers developed this morning and
are persisting into the afternoon. A brief, light rain shower provided a
trace of precipitation on the summit around 1:30 P.M. EST. The cloud cover
is also helping to keep temperatures on the cool side this afternoon.

Breezy W winds have picked up this afternoon, gusting at times in the
30-35 mph range.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus (3 levels), few cumulus distant NE-ESE and
distant SSE-SSW and distant WSW, few moderate cumulus distant S, altocumulus/
altocumulus lenticularis and a few altocumulus castellanus distant S-W-NNE,
distant haze, patchy frost
Temperature: 32F; Dew Point: 24F; Wind: W at 9 kts.
Sea-level pressure: 29.93 ins. Hg, rising then rising more rapidly
Visibility: 65 miles, distant haze
6-hr min temp: 31F
24-hr precip: 0.31 inch
BHO SA 1155 60 SCT 80 SCT 160 SCT 65 136/32/24/2609/993/ FEW CU DSNT
NE-ESE AND DSNT SSE-SSW AND DSNT WSW FEW MDT CU DSNT S AC/ACSL AND FEW ACC
DSNT S-W-NNE DSNT HZ PTCHY FROST/ 8/280 53025 MANUAL 70031 ASOS 70030 10037
20031

10 A.M.
Weather: Scattered cumulus, scattered altocumulus, broken altocumulus, broken
dense cirrus, broken cirrus, cumulus all quadrants, few moderate cumulus
distant W-NNW, altocumulus/altocumulus lenticularis all quadrants, higher
altocumulus ESE-SSW, patches of dense cirrus and cirrus NE-SE-WSW, partial
halo, distant haze
Temperature: 41F; Dew Point: 33F; Wind: W at 12G18 kts.
Sea-level pressure: 29.92 ins. Hg, rising then falling slightly
Visibility: 65 miles
BHO SA 1455 25 SCT 90 SCT 160 SCT E220 BKN 250 BKN 65 133/41/33/2712G18/992/
CU ALQDS FEW MDT CU DSNT W-NNW AC/ACSL ALQDS HIER AC ESE-SSW PTCHS DNS CI
AND CI NE-SE-WSW PARTIAL HALO DSNT HZ/ 8/242 58003

1 P.M.
Weather: Scattered cumulus, broken stratocumulus cumulogenitus (2 levels),
cumulus and moderate cumulus all quadrants, numerous rain showers distant
WSW-N-ENE moving SE, light distant haze
Temperature: 45F; Dew Point: 30F; Wind: W at 16G25 kts,
Wind: Peak wind of 29 kts. from the W at 12:42 P.M. EST
Wind: Direction variable WSW-NNW
Sea-level pressure: 29.88 ins. Hg, falling
Visibility: 65 miles, W-NW and NNW-N 45 miles, NW 75 miles
6-hr max temp: 48F
BHO SA 1755 35 SCT E45 BKN 60 BKN 65 119/45/30/2816G25/988/ CU AND MDT CU
ALQDS NMRS SHRA DSNT WSW-N-ENE MOVG SE LGT DSNT HZ VSBY W-NW AND NNW-N 45
NW 75 PK WND 2829/42 WND 25V34/ 8/400 56014 10048 20032

WEATHER SUMMARY FOR THURSDAY, NOVEMBER 7, 2013

TEMPERATURE (DEGREES F)
MAX…..65 NORMAL…..53
MIN…..37 NORMAL…..36
MEAN….51 NORMAL…..45

DEPARTURE FROM 30-YEAR NORMAL………………….+6
TOTAL DEPARTURE FOR THE MONTH…………………+17 [+2.2] DEGREE/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..14 DEPARTURE………-6
TOTAL HEATING UNITS FOR THE MONTH………….125 DEPARTURE……..-12
TOTAL HEATING UNITS FOR THE SEASON…………602 DEPARTURE……..-98
TOTAL HEATING UNITS LAST SEASON TO DATE…….574 DIFFERENCE…….+28

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………33 SW AT 9:49 A.M. *
AERO…………………..37 SW AT 9:49 A.M.
ASOS…………………..37 SW AT 9:49 A.M.
DAVIS………………….35 SSW AT 9:47 A.M. RMY 37
FASTEST MILE FOR YESTERDAY………………..27 SW AT 9:39 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..26 SW AT 9:49 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….26 SSW AT 9:47 A.M.
AVERAGE WIND SPEED AND DIRECTION…………16.8 WNW
ASOS…………………16.6
DAVIS………………..15.2 WSW [240 degrees] * last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.31 DEPARTURE………….+0.15
ASOS…………..0.30
TOTAL PRECIPITATION FOR THE MONTH……….0.47 DEPARTURE………….-0.62
ASOS…………..0.46
TOTAL PRECIPITATION FOR THE YEAR……….43.48 DEPARTURE………….-1.38
ASOS…………..N/A**
**ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………0.0 DEPARTURE…………..0.0
TOTAL SNOWFALL FOR THE MONTH………….Trace DEPARTURE………….-0.2
TOTAL SNOWFALL FOR THE SEASON…………Trace DEPARTURE………….-0.5

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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

11/1 68/56/62/+16/0.10/012/02 60 SSW AERO N/A N/A RMY 66
11/2 65/49/57/+11/0.00/296/48 22 WSW AERO N/A N/A RMY 23
11/3 49/30/40/-6/0.06/135/22 23 N AERO N/A N/A RMY N/A
11/4 42/27/35/-10/0.00/588/96 24 NNE AERO N/A N/A RMY 25
11/5 50/29/40/-5/0.00/487/80 16 SSW AERO N/A N/A RMY 17
11/6 59/40/50/+5/0.00/419/69 30 SSW AERO 31 MPH SSW RMY 33
11/7 65/37/51/+6/0.31/079/13 33 SW AERO 37 MPH SW RMY 37

11/8 morning low temp: 31F; the normal low is now 36F

DAILY RECORDS FOR NOVEMBER 2013
None so far.

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

RECORDS FOR NOVEMBER 8
HIGH 72 IN 1938
LOW 20 IN 1921
PRECIP 2.24 INCHES IN 1972
SNOWFALL 4.0 IN 1894
PEAK GUST 72e SE IN 1947

RECORDS FOR NOVEMBER 9
HIGH 72 IN 1975
LOW 17 IN 1971
PRECIP 1.37 INCHES IN 1969
SNOWFALL 0.2 IN 1921,1923
PEAK GUST 73e S IN 1943

TODAY’S REPORT PREPARED BY: Sean Fankhauser