Tuesday, September 15, 2015
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, SEPTEMBER 15, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
CLEAR, WARM STRETCH BEGINS THIS MORNING
CLOUDLESS SKIES ALL OBSERVATIONS
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Yesterday’s temperature averaged 62F, setting one of the few
cooler than normal days so far this month, with warmer than
normal temperatures expected this week. Thanks in part to the
record setting warmth experienced early last week, temperatures
are still averaging over 5 degrees above normal at the halfway
point through September. Yesterday’s average wind speed of 15.3 MPH
was also the first 15+ MPH wind day since July 1.
Following this morning’s 7:00 AM EST observation’s cloudless
conditions, not a single cloud has been observed through the 1:00
PM EST observation. Temperatures have slowly, but steadily risen
to a maximum of 80F, more than 8 degrees above today’s daily normal
maximum.
Today’s Observations:
7 A.M.
Weather: Sky Clear
Temperature: 61F; Dew Point: 53F; Wind: WNW at 9 kts,
Sea-level pressure: 30.24 ins. Hg, rising, then more quickly
Visibility: 70 miles, light distant haze
6-hr Max temp: 61F
6-hr Min temp: 56F
24-hr precip: 0.00 in.
BHO SA 1155 CLR 70 239/61/53/2909/024/ SKC LGT DSNT HZ ALQDS/
8/000 53021 10061 20056
10 A.M.
Weather: Sky Clear
Temperature: 74F; Dew Point 55F; Wind: NW at 7 kts,
Sea-level pressure: 30.27 ins. Hg, rising, then more slowly
Visibility: 70 miles, light distant haze
BHO SA 1455 CLR 70 251/74/55/3107/027/ SKC LGT DSNT HZ ALQDS/
8/000 51012
1 P.M.
Weather: Sky Clear
Temperature: 79F; Dew Point: 56F; Wind: WNW at 8G16 kts
Sea-level pressure: 30.24 ins. Hg, falling steadily
Visibility: 70 miles, light distant haze
6-hr Max: 80F
6-hr Min: 61F
BHO SA 1755 CLR 70 242/79/56/2908G16/024/ SKC LGT DSNT HZ ALQDS/
8/000 57009 10080 20061
SUMMARY FOR MONDAY, SEPTEMBER 14, 2015
TEMPERATURE (DEGREES F)
MAX…..70 NORMAL…..72
MIN…..53 NORMAL…..55
MEAN….62 NORMAL…..64
DEPARTURE FROM 30-YEAR NORMAL……………………-2
TOTAL DEPARTURE FOR THE MONTH…………………..+73 [+5.0 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0 DEPARTURE……….-2
TOTAL COOLING UNITS FOR THE MONTH…………..92 DEPARTURE………+51
TOTAL COOLING UNITS FOR THE SEASON…………758 DEPARTURE……..+180
TOTAL COOLING UNITS LAST SEASON TO DATE…….565 DIFFERENCE…….+193
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….33 W AT 2:16 P.M.
ASOS……………………35 W AT 2:17 P.M.
DAVIS…………………..35 W AT 1:20 P.M. RMY 35
FASTEST MILE FOR YESTERDAY……………….. 25 W AT 2:18 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE………………25 W AT 2:17 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..24 W AT 10:23 A.M.
AVERAGE WIND SPEED AND DIRECTION……………15.3 W
ASOS……………………15.1
DAVIS…………………..13.1 W [284 DEG]
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………..1.35 DEPARTURE…..-0.40
ASOS……………1.33
TOTAL PRECIPITATION FOR THE YEAR………..31.60 DEPARTURE…..-5.16
ASOS…………….N/A ***
*** ASOS annual total not available due to erroneous readings
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 81/65/73/+5/0.00/…/.. 20 SSW RMY 20
9/2 89/64/77/+9/0.00/…/.. 20 SW RMY 21
9/3 85/66/76/+9/T/…/.. 17 E RMY N/A TSTM
9/4 72/58/65/0/0.00/…/.. 31 ENE RMY N/A
9/5 77/55/66/-1/0.00/…/.. 14 SW RMY 18
9/6 87/57/72/+5/0.00/…/.. 21 SSW RMY 22
9/7 92/63/78/+12/0.00/…/.. 23 WSW RMY 24
9/8 97/70/84/+18/0.00/…/.. 22 WSW RMY 24
9/9 92/70/81/+15/0.00/…/.. 30 SSW RMY 33
9/10 73/62/68/+3/…./…/.. 29 NE RMY N/A
9/11 70/59/65/0/…./…/.. 33 NE RMY N/A
9/12 75/58/67/2/…./…/.. 18 SSE RMY 25
9/13 66/60/63/-1/…./000/00 25 E RMY N/A
9/14 70/53/62/-2/0.00/…/.. 33 W RMY 35
9/15 low since midnight is 56F; normal low is now 55F
DAILY RECORDS FOR SEPTEMBER 2015
**9/7 DAILY RECORD MAXIMUM TEMPERATURE OF 92F
TIES PREVIOUS RECORD SET IN 2007**
**9/8 DAILY RECORD MAXIMUM TEMPERATURE OF 97F
BREAKS PREVIOUS RECORD OF 93F SET IN 2007**
**9/8 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 70F
BREAKS PREVIOUS RECORD OF 69F SET IN 1999**
**9/9 DAILY RECORD MAXIMUM TEMPERATURE OF 92F
BREAKS PREVIOUS RECORD OF 91F SET IN 2002**
**9/9 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 70F
BREAKS PREVIOUS RECORD OF 69F SET IN 1999**
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR SEPTEMBER 15
HIGH 89F IN 1931
LOW 35F IN 1913
PRECIP 3.93 INCHES IN 1904 (Extra-tropical storm making landfall in New England on 9/15/1904 passing east of BHO and bringing a storm total of 4.11 inches 9/14-15/1904)
PEAK GUST 65e MPH NW, WSW IN 1944 (In the wake of Great Atlantic Hurricane)
RECORDS FOR SEPTEMBER 16
HIGH 91F IN 1939,1941
LOW 39F IN 1984
PRECIP 5.12 INCHES IN 1933 (Hurricane)
PEAK GUST 59 MPH SSE IN 1999
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
