Thursday, Novemer 7, 2013

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, NOVEMBER 7, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME

A TENTH OF AN INCH OF RAINFALL THROUGH 1 P.M.
TEMPERATURES REACH MAXIMUM OF 65F WITH SOME SUNSHINE

Light rain began falling just before noon and 0.11 inch was measured at
1 P.M. with the light rain continuing. Our high temperature of 65F was
reached about 10:20 this morning during a short period of sunshine.

Today’s Observations:

7 A.M.
Weather: Low overcast stratus, heavy condensation all surfaces
Temperature: 57F; Dew Point: 57F; Wind: S at 15G24 kts.
Sea-level pressure: 29.85 ins. Hg, falling then more rapidly
Visibility: 15 miles, W 12 miles, NW 10 miles, NE 20 miles, thin fog
all quadrants
6-hr min temp: 51F
24-hr precip: none
BHO SA 1155 E5 OVC 15 108/57/57/1915G24/985/ THN F ALQDS VSBY W 12 NW 10
NE 20 HVY CONDENSATION ALL SFCS/ 8/6// 58033 10057 20051

10 A.M.
Weather: Overcast variable to broken stratocumulus, break in overcast E-SW,
higher cirrus clouds visible, showers of rain and dark sky distant W-N
Temperature: 65F; Dew Point: 56F; Wind: SW at 16G32 kts,
Wind: Peak wind from SW at 32 kts and 9:49 A.M.,
Wind: Direction variable S-WSW
Sea-level pressure: 29.79 ins. Hg, falling
Visibility: 40 miles, except WSW 20 miles, WNW 35 miles, NW-NNW 20 miles,
rain shower/dark sky distant W-N
3-hr precip: trace
BHO SA 1455 E22V OVC 40 088/65/56/2216G32/979/ CIG RGD 22 OVCVBKN HIER CI
CLDS VSB SHRA/DRK DSNT W-N VSBY WSW 20 WNW 35 NW-NNW 20 PK WND 2232/49
WND 18V25/ 8/501 58020 MANUAL 6000/

1 P.M.
Weather: Scattered variable to broken stratus fractus, overcast
nimbostratus, light rain and fog
Temperature: 57F; Dew Point: 57F; Wind: W at 13 kts,
Sea-level pressure: 29.72 ins. Hg, falling then more slowly
Visibility: 5 miles, light rain, fog
6-hr max temp: 65F
6-hr precip: 0.11 inch
BHO SA 1755 18 SCT E70 OVC 5R-F 063/57/57/2713/972/ 18 SCT V BKN/ 8/72/
56025 ASOS 60010 MANUAL 60011 10065 20057

WEATHER SUMMARY FOR WEDNESDAY, NOVEMBER 6, 2013

TEMPERATURE (DEGREES F)
MAX…..59 NORMAL…..53
MIN…..40 NORMAL…..36
MEAN….50 NORMAL…..45

DEPARTURE FROM 30-YEAR NORMAL………………….+5
TOTAL DEPARTURE FOR THE MONTH…………………+11 [+1.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..15 DEPARTURE………-5
TOTAL HEATING UNITS FOR THE MONTH………….111 DEPARTURE………-6
TOTAL HEATING UNITS FOR THE SEASON…………588 DEPARTURE……..-92
TOTAL HEATING UNITS LAST SEASON TO DATE…….545 DIFFERENCE…….+43

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………30 SSW AT 7:51 P.M.
AERO…………………..31 SSW AT 11:52 P.M. *
ASOS…………………..33 SSW AT 7:51 P.M.
DAVIS………………….32 S AT 7:51 P.M. RMY 33
FASTEST MILE FOR YESTERDAY………………..25 SSW AT 11:57 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..24 SSW AT 11:59 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….24 S AT 7:51 P.M.
AVERAGE WIND SPEED AND DIRECTION…………15.5 S
ASOS………………….M
DAVIS………………..14.4 SSW [200 degrees] * last of several occurrences…

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……….0.16 DEPARTURE………….-0.77
ASOS…………..0.16
TOTAL PRECIPITATION FOR THE YEAR……….43.17 DEPARTURE………….-1.53
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/…/.. 60 SSW AERO N/A N/A RMY 66
11/2 65/49/57/+11/0.00/…/.. 22 WSW AERO N/A N/A RMY 23
11/3 49/30/40/-6/0.06/…/.. ** 23 N AERO N/A N/A RMY N/A
11/4 42/27/35/-10/0.00/…/.. 24 NNE AERO N/A N/A RMY 25
11/5 50/29/40/-5/0.00/…/.. 16 SSW AERO N/A N/A RMY 17
11/6 59/40/50/+5/0.00/…/.. 30 SSW AERO 31 MPH SSW RMY 33

11/7 morning low temp: 51F; the normal low is now 36F

** trace of snow on 11/3

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 7
HIGH 75 IN 1938
LOW 21 IN 1930
PRECIP 2.02 INCHES IN 1953
SNOWFALL 3.5 IN 2012
PEAK GUST 69e ENE IN 1953

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

TODAY’S REPORT PREPARED BY: Robert Skilling