Wednesday, September 10, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, SEPTEMBER 10, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

COOL TEMPERATURES PREVAIL WITH FOG LINGERING INTO
THIS MORNING…
TEMPERATURES STRUGGLE TO REACH 71F DEGREES TODAY

Yesterday’s maximum of 71F fell 3 degrees short of the daily
maximum norm, thanks in part to increased cloud cover
throughout the day, and a brisk NE-E wind.

No precipitation was recorded once again, increasing the
monthly deficit to -1.06 inches and allowing the annual
deficit to approach -5 inches. The total precipitation since
August 14 of 0.30 inch represents about 9 percent of the normal
rainfall over that 27 day period.

Temperatures struggled up to 71F at 1 P.M. EDT early this afternoon.

The month has had 79 percent of the possible bright sunshine during
the first nine days.

Today’s Observations:

7 A.M.
Weather: Overcast stratus, fog distant all quadrants
Temperature: 60F; Dew Point: 58F; Wind: NNE at 6 kts,
Sea-level pressure: 30.17 ins. Hg, rising, then falling slightly
Visibility: 10 miles, light distant haze in all directions,
thin fog distant all quadrants, E-SE 8 miles
6-hr max temp: 60F
6-hr min temp: 58F
24-hr precip: 0.00
BHO SA 1155 4 OVC 10 216/60/58/E0206/017/ VSBY E-SE 8 MI FG DSNT ALQDS
LGT SPTS IOVC SE-SW WND LGT/ 8/6// 50006 10060 20058

10 A.M.
Weather: Broken variable overcast stratocumulus, hazy
Temperature: 65F; Dew Point: 59F; Wind: ENE at 6 kts,
Sea-level pressure: 30.17 ins. Hg, about steady
Visibility: 25 miles, hazy, except 15 NE-E, thin fog, haze increasing
BHO SA 1455 E10V BKN 25 216/65/59/0706/017/ 10 BKN V OVC HAZY/
8/5// 55000

1 P.M.
Weather: Scattered cumulus, scattered variable to broken stratocumulus,
hazy
Temperature: 69F; Dew Point: 58F; Wind: ENE at 11 kts,
Sea-level pressure: 30.14 ins. Hg, falling, then more slowly
Visibility: 20 miles, except 12 miles NE-E, 15 miles SE, thin fog, 25 miles
SW-N, hazy
6-hr max. temp: 71F
6-hr min. temp: 60F
BHO SA 1755 22 SCT 30V SCT 20 207/69/58/0711/014/ 30 SCT V BKN
VSBY NE-E 12 SE 15 SW-N 25 HAZY ALQDS/ 8/800 56009 10071 20060

WEATHER SUMMARY FOR TUESDAY, SEPTEMBER 9, 2014

TEMPERATURE (DEGREES F)
MAX……71    NORMAL…..74
MIN……59    NORMAL…..57
MEAN…..65    NORMAL…..66

DEPARTURE FROM 30-YEAR NORMAL…………………….-1
TOTAL DEPARTURE FOR THE MONTH……………………+65 [+7.0 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0   DEPARTURE………..-3
TOTAL COOLING UNITS FOR THE MONTH………….82   DEPARTURE……….+52
TOTAL COOLING UNITS FOR THE SEASON………..561   DEPARTURE………..-6
TOTAL COOLING UNITS LAST SEASON TO DATE……663   DIFFERENCE……..-102

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0  DEPARTURE……….-2
TOTAL HEATING UNITS FOR THE MONTH……………0  DEPARTURE………-15
TOTAL HEATING UNITS FOR THE SEASON…………..2  DEPARTURE………-38
TOTAL HEATING UNITS LAST SEASON TO DATE……..36  DIFFERENCE……..-34

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………23 ENE AT  8:59 A.M. *
ASOS…………………..25 ESE AT  8:57 A.M.
DAVIS………………….22 NE  AT  N/A
FASTEST MILE FOR YESTERDAY………………..17 E   AT  9:33 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..18 E   AT  8:58 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….17 E   AT  9:33 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..11.0 NE
ASOS…………………..11.1
DAVIS…………………. 9.8 ENE [070 deg)
* last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……….-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR SEPTEMBER……….0.03  DEPARTURE……….-1.06
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE YEAR……….31.21  DEPARTURE……….-4.90
ASOS………….31.45

PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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

9/1  88/69/79/+11/0.00/…/..             16 W   RMY 19
9/2  91/70/81/+13/0.00/…/..             24 S   RMY 27 TSTM
9/3  83/67/75/+8/0.00/…/..              24 NW  RMY 27
9/4  86/61/74/+7/0.00/…/,.              20 SW  RMY 22
9/5  89/66/78/+11/0.00/…/..             25 SSW RMY 29
9/6  90/67/79/+12/T//…/..               33 SSW RMY 36 TSTM
9/7  77/62/70/+4/0.03/…/..              26 NW  RMY N/A
9/8  74/57/66/+0/0.00/…/..              25 ENE RMY 25
9/9  71/59/65/-1/0.00/…/..              23 ENE RMY 23

9/10  morning low temp: 59F since midnight; normal low now 57F

DAILY RECORDS FOR SEPTEMBER 2014:
None so far.

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

RECORDS FOR SEPTEMBER 10
HIGH 90F IN 1931,1989
LOW 41F IN 1956
PRECIP 5.60 INCHES IN 1999 (DAILY RECORD FOR SEPTEMBER)
PEAK GUST 48 MPH NW IN 1972

RECORDS FOR SEPTEMBER 11
HIGH 93F IN 1983, 2013
LOW 37F IN 1917
PRECIP 5.23 INCHES IN 1954 (HURRICANE EDNA)
PEAK GUST 101 MPH NW IN 1954 (HURRICANE EDNA)

TODAY’S REPORT PREPARED BY: Brian Fitzgerald/Robert Skilling