Wednesday, September 17, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, SEPTEMBER 17, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
TRACE OF RAIN FALLS YESTERDAY AMID OMINOUS SKIES,
PRECIP DEFICIT INCREASES YET AGAIN
Nearly cloudless skies were present at the 7:00 AM EST observation
with visibilities maxing out at 80 miles in all directions. Winds
have remained light and variable through the morning with calm
conditions present at times.
Following yesterday’s trace our deficit at Blue Hill increases
once again to -1.82 inches for the month and -5.66 inches
for the year.
By the 1:00 PM EST observation a maximum of 71F had been reached
under mostly clear skies, including a few small cumulus in all
directions with visibility of 75 miles in all directions.
Today’s Observations:
7 A.M.
Weather: Clear, few cirrus distant SE
Temperature: 54; Dew Point: 47F; Wind: NW at 7 kts
Sea-level pressure: 30.03 ins. Hg, rising, then more slowly
Visibility: 80 miles
6-hr max temp: 54F
6-hr min temp: 50F
24-hr precip: Trace
BHO SA 1155 CLR 80 168/54/47/3207/003/ FEW CI DSNT SE/ 8/001 51009
MANUAL 7000/ 10054 20050
10 A.M.
Weather: Clear, few small cumulus in all directions
Temperature: 65F; Dew Point: 44F; Wind: estimated WNW at 3 kts
Wind Speed and Direction: Light and Variable
Sea-level pressure: 30.03 ins. Hg, same as three hours ago
Visibility: 75 miles
BHO SA 1455 CLR 75 168/65/44/E3003/003/ FEW SML CU ALQDS WND LGT
AND VRB/ 8/100 50000
1 P.M.
Weather: Clear, few small cumulus, few cirrostratus distant
SSW-SE
Temperature: 70F; Dew Point: 41F; Wind: estimated WSW at 6 kts
Wind Speed: Light
Sea-level pressure: 29.98 ins. Hg, steady, then falling
Visibility: 75 miles
6-hr max temp: 71F
6-hr min temp: 53F
BHO SA 1755 CLR 75 152/70/41/E2506/998/ FEW SML CU ALQDS FEW CS DSNT
SSW-SE WND LGT/ 8/105 58016 10071 20053
WEATHER SUMMARY FOR TUESDAY, SEPTEMBER 16, 2014
TEMPERATURE (DEGREES F)
MAX…..66 NORMAL…..72
MIN…..52 NORMAL…..55
MEAN….59 NORMAL…..63
DEPARTURE FROM 30-YEAR NORMAL…………………….-4
TOTAL DEPARTURE FOR THE MONTH……………………+41 [+2.4 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……….+41
TOTAL COOLING UNITS FOR THE SEASON………..565 DEPARTURE……….-17
TOTAL COOLING UNITS LAST SEASON TO DATE……694 DIFFERENCE……..-129
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………6 DEPARTURE……….+2
TOTAL HEATING UNITS FOR THE MONTH…………..33 DEPARTURE……….-2
TOTAL HEATING UNITS FOR THE SEASON………….35 DEPARTURE………-25
TOTAL HEATING UNITS LAST SEASON TO DATE……..56 DIFFERENCE……..-21
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………16 SW AT 11:33 A.M. *
ASOS…………………..16 SW AT 11:31 A.M.
DAVIS………………….15 NW AT 1:10 P.M. RMY 16
FASTEST MILE FOR YESTERDAY………………..13 SE AT 1:08 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..13 SW AT 11:33 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….N/A
AVERAGE WIND SPEED AND DIRECTION…………..6.0 WNW
ASOS…………………..6.3
DAVIS………………….5.5 SSW (200 degrees)
* last of several occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……….-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.20 DEPARTURE……….-1.82
ASOS…………..0.18
TOTAL PRECIPITATION FOR THE YEAR……….31.38 DEPARTURE……….-5.66
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 morning low temp: 50F 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 17
HIGH 86F IN 1915,1941,1991
LOW 38F IN 1959
PRECIP 2.73 INCHES IN 1933
PEAK GUST 60 MPH WNW IN 1999
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
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
