Wednesday, September 24, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, SEPTEMBER 24, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

CLOUDS FILTER IN FROM THE SOUTH,
NEEDED RAIN POTENTIALLY ON THE WAY

Only 0.26 inches of precipitation has been recorded for
the month of September with less than one week left in the month.
The driest September on record of 0.45 inches, back in 1914, may
be in jeopardy depending on what rain may fall tomorrow.

Cirrostratus that was distant to the SE-SW at the 7:00 AM EST
observation were quick to filter in along with low level cumulus
and thin fog.

By the 1:00 PM EST observation low cumulus and increasing
cirrostratus/cirrus invading from the south were in place
with a visibility of 40 miles in all directions. A maximum of
69F had been reached.

Today’s Observations:

7 A.M.
Weather: Few cirrostratus distant ESE-WSW
Temperature: 57F; Dew Point: 50F; Wind: NE at 10 kts,
Sea-level pressure: 30.57 ins. Hg, rising, then more slowly
Visibility: 50 miles, 35 miles ESE-WSW, thin fog in all directions
6-hr max temp: 57F
6-hr min temp: 52F
24-hr precip: 0.00
BHO SA 1155 CLR 50 352/57/50/0410/057/ FEW CS DSNT ESE-WSW VSBY
ESE-WSW 35 MI THN FG ALQDS/ 8/005 51023 10057 20052

10 A.M.
Weather: Scattered cumulus, broken cirrostratus/cirrus fibratus
Temperature: 64F; Dew Point: 53F; Wind: ENE at 9 kts,
Sea-level pressure: 30.63 ins. Hg, rising, then steady
Visibility: 40 miles, light distant haze in all directions
BHO SA 1455 44 SCT E250 BKN 40 372/64/53/0609/063/
VSBY SW-NNE 30 MI LGT DSNT HZ ALQDS/ 8/106 51020

1 P.M.
Weather: Scattered cumulus, scattered cirrostratus,
broken cirrus fibratus
Temperature: 69F; Dew Point: 49F; Wind: E at 9 kts,
Sea-level pressure: 30.63 ins. Hg, the same as three hours ago
Visibility: 40 miles, light distant haze in all directions
6-hr max temp: 69F
6-hr min temp: 57F
BHO SA 1755 34 SCT 200 SCT E250 BKN 40 372/69/49/0909/063/
LGT DSNT HZ ALQDS/ 8/106 50000 10069 20057

WEATHER SUMMARY FOR TUESDAY, SEPTEMBER 23, 2014

TEMPERATURE (DEGREES F)
MAX…..70 NORMAL…..69
MIN…..44 NORMAL…..52
MEAN….57 NORMAL…..60

DEPARTURE FROM 30-YEAR NORMAL…………………….-3
TOTAL DEPARTURE FOR THE MONTH……………………+30 [+1.1 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE………..-1
TOTAL COOLING UNITS FOR THE MONTH………….92 DEPARTURE……….+38
TOTAL COOLING UNITS FOR THE SEASON………..571 DEPARTURE……….-20
TOTAL COOLING UNITS LAST SEASON TO DATE……696 DIFFERENCE……..-125

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………8 DEPARTURE……….+2
TOTAL HEATING UNITS FOR THE MONTH…………..74 DEPARTURE……….+6
TOTAL HEATING UNITS FOR THE SEASON………….76 DEPARTURE………-17
TOTAL HEATING UNITS LAST SEASON TO DATE……..73 DIFFERENCE……..-17

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………20 W AT 3:55 P.M.
ASOS…………………..20 WSW AT 3:56 P.M.
DAVIS………………….20 WSW AT 3:56 P.M. RMY 20
FASTEST MILE FOR YESTERDAY………………..14 WNW AT 4:14 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..15 W AT 3:53 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….14 WSW AT 2:55 P.M.
AVERAGE WIND SPEED AND DIRECTION………….7.5 W
ASOS………………….7.9
DAVIS…………………6.2 W (276 degrees)
* last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……….-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.26 DEPARTURE……….-2.76
ASOS…………..0.23
TOTAL PRECIPITATION FOR THE YEAR……….31.44 DEPARTURE……….-6.60
ASOS………….31.66

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/+11/0.00/710/90 16 W RMY 19
9/2 91/70/81/+13/0.00/495/63 24 S RMY 27 TSTM
9/3 83/67/75/+8/0.00/681/87 24 NW RMY 27
9/4 86/61/74/+7/0.00/758/97 20 SW RMY 22
9/5 89/66/78/+11/0.00/731/94 25 SSW RMY 29
9/6 90/67/79/+12/T/481/62 33 SSW RMY 36 TSTM
9/7 77/62/70/+4/0.03/687/89 26 NW RMY N/A
9/8 74/57/66/+0/0.00/601/78 25 ENE RMY 25
9/9 71/59/65/-1/0.00/384/50 23 ENE RMY 23
9/10 71/58/65/0/0.00/329/43 20 NE RMY 20
9/11 78/60/69/+4/0.00/099/13 31 SW RMY 35
9/12 72/51/62/-3/0.00/735/97 25 NNW RMY 22
9/13 67/50/59/-5/0.17/159/21 23 E RMY 24
9/14 66/47/57/-7/0.00/685/91 25 NW RMY 24
9/15 67/43/55/-9/0.00/698/93 17 W RMY 18
9/16 66/52/59/-4/T/…/.. 16 SW RMY 16
9/17 72/50/61/-2/0.00/…/.. 16 NW RMY 17
9/18 74/52/63/+1/0.00/…/.. 21 N RMY 23
9/19 56/43/50/-12/0.00/…/.. 21 NE RMY 23
9/20 71/45/58/-4/…./…/.. 29 S RMY 30
9/21 80/61/71/+10/0.06/…/.. 26 SSE RMY 27
9/22 72/48/60/-1/0.00/…/.. 33 W RMY 35
9/23 70/44/57/-3/0.00/…/.. 20 W RMY 20