Monday, November 11, 2013

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, NOVEMBER 11, 2013 VETERANS DAY
ALL TIMES ARE IN EASTERN STANDARD TIME

FIRST ARCTIC AIR MASS OF SEASON TO ARRIVE LATE TODAY
OR EARLY TOMORROW WITH GUSTY WINDS
HIGH PRESSURE OF 1041 MBS ALONG U.S. CANADIAN BORDER
ALONG NORTH DAKOTA BORDER

A strong Arctic cold front is expected to pass by early
tomorrow with falling temperatures which could approach
20 degrees by Wednesday morning.  The record low temperature
for November 12 is 18F in 1926 and 13 November is 14F in 1920.

Yesterday’s rainfall of 0.08 inches did little to help our growing
precipitation deficit, as we remain locked in a dry pattern with little
precipitation expected this week.  A yearly precipitation surplus that topped
5.50 inches in early September is now a deficit of over 1.50 inches, and this
deficit will likely continue to grow during the mostly dry conditions
expected for the next several days.

Today’s Observations:

7 A.M.
Weather: Clear, stratocumulus distant SW-N-ESE, few lower cumulus fractus
W-WNW, few lower cumulus ENE-E, cirrus distant SSW-SW
Temperature: 37F; Dew Point: 25F; Wind: WNW at 14G20 kts,
Wind: Peak wind WNW @ 26 kts @ 6:09 A.M.,
Wind: Direction variable WSW-NW
Sea-level pressure: 30.06 ins. Hg, rising then more rapidly
Visibility: 60 miles, light distant haze
6-hr min temp: 36F
24-hr precip: trace
BHO SA 1155 CLR 60 178/37/25/2914G20/006/ SC DSNT SW-N-ESE FEW LWR
CU/CUFRA W-WNW AND CU ENE-E CI DSNT SW DSNT HZ PK WND 2926/09/
8/801 53036 10040 20036

10 A.M.
Weather: Thin scattered cirrus, cirrus all quadrants, layer SE-SW,
few stratocumulus distant W-N-E
Temperature: 43F; Dew Point: 26F; Wind: SSW at 9 kts
Sea-level pressure: 30.10 ins. Hg, rising then more slowly
Visibility: 75 miles, light distant haze
BHO SA 1455 250 –SCT 75 194/43/26/2809/010/ FEW SC DSNT W-N-E CI ALQDS
CI LYR XTDNG SE-S-SW LGT DSNT HZ/ 9/501 51016

1 P.M.
Weather: Thin scattered cirrus, few lower cirrus
Temperature: 48F; Dew Point: 22F; Wind: WSW at 11 kts,
Wind: Direction variable SSW-NW
Sea-level pressure: 30.03 ins. Hg, falling then more rapidly
Visibility: 75 miles, light distant haze
6-hr max temp: 49F
BHO SA 1755 250 –SCT 75 170/48/22/2511/003/ FEW LWR DNS CI
LGT DSNT HZ WND 20V31/ 8/001 58024 10049 20037

WEATHER SUMMARY FOR SUNDAY, NOVEMBER 10, 2013

TEMPERATURE (DEGREES F)
MAX…..52    NORMAL…..52
MIN…..40    NORMAL…..35
MEAN….46    NORMAL…..44

DEPARTURE FROM 30-YEAR NORMAL………………….+2
TOTAL DEPARTURE FOR THE MONTH………………….+8 [+0.6 DEGREE/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..19  DEPARTURE………-2
TOTAL HEATING UNITS FOR THE MONTH………….197  DEPARTURE………-3
TOTAL HEATING UNITS FOR THE SEASON…………674  DEPARTURE……..-89
TOTAL HEATING UNITS LAST SEASON TO DATE…….648  DIFFERENCE…….+26

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………31 WNW AT   2:33 P.M.
AERO…………………..33 WNW AT   2:33 P.M.
ASOS…………………..34 WNW AT   2:33 P.M.
DAVIS………………….33 WNW AT   2:33 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..23 WNW AT  2:31 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..22 W   AT   2:38 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….22 WNW AT   2:31 P.M.
AVERAGE WIND SPEED AND DIRECTION…………14.1 W
ASOS…………………13.4
DAVIS………………..12.9 SW [230 degrees] * last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….Trace  DEPARTURE………….-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.55   DEPARTURE………….-1.01
ASOS…………..0.53
TOTAL PRECIPITATION FOR THE YEAR……….43.56   DEPARTURE………….-1.77
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………….-0.3
TOTAL SNOWFALL FOR THE SEASON…………Trace   DEPARTURE………….-0.6

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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/T/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  48/31/40/-4/T/T/…/..          37 WNW AERO 37 MPH WNW RMY 39
11/9  44/29/37/-7/0.00/…/..         25 WNW AERO 25 MPH WNW RMY 29
11/10 52/40/46/+2/0.08/…/..         31 WNW AERO 33 MPH WNW RMY N/A

11/11 morning low temp: 36F; the normal low is now 35F

Please note daily snowfall has been added to table above…

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 11
HIGH 68 IN 1984
LOW 17 IN 1956
PRECIP 1.14 INCHES IN 1991
SNOWFALL 2.5 IN 1986
PEAK GUST 64 NW IN 1962

RECORDS FOR NOVEMBER 12
HIGH 74 IN 1909
LOW 18 IN 1926
PRECIP 3.25 INCHES IN 1947
SNOWFALL 8.1 INCHES IN 1987
PEAK GUST 79e MPH NW IN 1947

TODAY’S REPORT PREPARED BY: Robert Skilling