Thursday, September 18, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, SEPTEMBER 18, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
VERY SUNNY, MILD AND DRY WITH CONTINUING INCREASE
IN RAINFALL DEFICIT…
Following yesterday’s lack of precipitation, our deficit at
Blue Hill increases once again to -1.96 inches for the month
and -5.80 inches for the year. The rainfall total so far for
this month is only 0.20 inch.
Today’s Observations:
7 A.M.
Weather: Thin scattered cirrus, cirrus ENE-S
Temperature: 55F; Dew Point: 44F; Wind: WNW at 10 kts
Sea-level pressure: 29.98 ins. Hg, rising, then more quickly
Visibility: 60 miles, light distant haze
6-hr max temp: 55F
6-hr min temp: 52F
24-hr precip: 0.00
BHO SA 1155 250 -SCT 60 154/55/44/2910/998/ 250 THN SCT CI ENE-S
LGT DSNT HZ/ 8/001 53008 10055 20052
10 A.M.
Weather: Clear, few lone cirrus/cirrocumulus lenticularis distant SSE
Temperature: 67F; Dew Point: 44F; Wind: NW at 7 kts,
Wind: Direction variable from W-NNW
Sea-level pressure: 29.99 ins. Hg, falling slightly
Visibility: 60 miles, light distant haze increasing
BHO SA 1455 CLR 60 157/67/44/3107/999/ FEW LONE CI/CCSL DSNT SSE
WND 27V34/ 8/009 50003
1 P.M.
Weather: Scattered cumulus/moderate cumulus except distant NE-SE
Temperature: 73F; Dew Point: 44F; Wind: WNW at 8 kts
Sea-level pressure: 29.98 ins. Hg, falling slightly
Visibility: 60 miles, distant haze
6-hr max temp: 74F
6-hr min temp: 55F
BHO SA 1755 50 SCT 55 151/73/44/2908/998/ CU/FEW MDT CU XCPT DSNT
NE-ESE DSNT HZ/ 8/200 58006 10074 20055
WEATHER SUMMARY FOR WEDNESDAY, SEPTEMBER 17, 2014
TEMPERATURE (DEGREES F)
MAX…..72 NORMAL…..71
MIN…..50 NORMAL…..54
MEAN….61 NORMAL…..63
DEPARTURE FROM 30-YEAR NORMAL…………………….-2
TOTAL DEPARTURE FOR THE MONTH……………………+39 [+2.1 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE………..-2
TOTAL COOLING UNITS FOR THE MONTH………….86 DEPARTURE……….+40
TOTAL COOLING UNITS FOR THE SEASON………..565 DEPARTURE……….-18
TOTAL COOLING UNITS LAST SEASON TO DATE……694 DIFFERENCE……..-129
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………4 DEPARTURE……….+2
TOTAL HEATING UNITS FOR THE MONTH…………..37 DEPARTURE……….-2
TOTAL HEATING UNITS FOR THE SEASON………….39 DEPARTURE………-25
TOTAL HEATING UNITS LAST SEASON TO DATE……..71 DIFFERENCE……..-32
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………16 NW AT 4:34 P.M.
ASOS…………………..16 NW AT 4:34 P.M.
DAVIS………………….16 S AT N-1 P.M. RMY 17
FASTEST MILE FOR YESTERDAY………………..11 NW AT 5:00 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..13 NW AT 5:08 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….11 NW AT 4:52 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.5 WNW
ASOS…………………..7.9
DAVIS………………….6.7 WNW (290 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……….0.20 DEPARTURE……….-1.96
ASOS…………..0.18
TOTAL PRECIPITATION FOR THE YEAR……….31.38 DEPARTURE……….-5.80
ASOS………….31.61
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/…/.. 20 NE RMY 20
9/11 78/60/69/+4/0.00/…/.. 31 SW RMY 35
9/12 72/51/62/-3/0.00/…/.. 25 NNW RMY 22
9/13 67/50/59/-5/0.17/…/.. 23 E RMY 24
9/14 66/47/57/-7/0.00/…/.. 25 NW RMY 24
9/15 67/43/55/-9/0.00/…/.. 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 morning low temp: 52F since midnight; normal low now 54F
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 18
HIGH 88F IN 1906
LOW 36F IN 1919
PRECIP 4.25 INCHES IN 1996
PEAK GUST 77e MPH WNW IN 1948
RECORDS FOR SEPTEMBER 19
HIGH 87F IN 1906,1983
LOW 37F IN 1929
PRECIP 3.69 INCHES IN 1936
PEAK GUST 55 MPH S IN 2012
TODAY’S REPORT PREPARED BY: Robert Skilling
