Monday, September 14, 2015
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, SEPTEMBER 14, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
HEAVY RAIN SHOWER SUNDAY EVENING DROPS BRINGS
24 HOUR PRECIP TOTAL TO 0.40 INCHES
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Fog and drizzle kept the summit thoroughly moist yesterday,
while heavy rain showers entered the area yesterday evening
brought torrential downpours in some locations. By 6:00 PM EST
last evening, heavy rain showers brought a quick 0.39 inches
of new rain in less than one hour.
Skies cleared out overnight, bringing cooler and drier air in
its wake. Temperatures dipped to a slightly cooler than normal
53F by 6:00 AM EST this morning. Winds have kicked up as well,
with gusts exceeding 30 MPH from the W as low stratocumulus
have begun to build in from the W as well.
By the 1:00 PM EST observation stratocumulus were broken in all
directions with an isolated pop-up shower visible approximately
40 miles WNW of the station. Cool temperatures had yet to reach
the 70F mark today.
Today’s Observations:
7 A.M.
Weather: Clear, few cumulus distant SE-NNE, few altocumulus
distant WSW-N, few dense cirrus distant SE-N
Temperature: 57F; Dew Point: 52F; Wind: W at 14G22 kts,
Sea-level pressure: 29.87 ins. Hg, rising, then more slowly
Visibility: 80 miles, except 40 miles WSW-NNW
6-hr Max temp: 58F
6-hr Min temp: 53F
24-hr precip: 0.40 in.
BHO SA 1155 CLR 80 115/57/52/2614G22/987/ VSBY WSW-NNW 40 MI
FEW CU DSNT SE-NNE FEW AC DSNT WSW-N FEW CI DSNT SE-N/
8/132 51020 ASOS 70039 MANUAL 70040 10058 20053
10 A.M.
Weather: Scattered stratocumulus, scattered cirrus fibratus
Temperature: 64F; Dew Point 52F; Wind: W at 17G24 kts,
Peak Wind: 26 kts W @ 9:01 AM EST
Sea-level pressure: 29.90 ins. Hg, rising, then falling, but higher still
Visibility: 75 miles
BHO SA 1455 30 SCT 250 SCT 75 125/64/52/2717G24/990/
PK WND 2626/01/ 8/501 50010
1 P.M.
Weather: Broken stratocumulus, showers distant WNW
Temperature: 69F; Dew Point: 54F; Wind: W at 14G22 kts
Peak Wind: 26 knots W @ 12:43 PM EST
Sea-level pressure: 29.92 ins. Hg, rising, then more slowly
Visibility: 70 miles, except 40 miles WNW, obscured by rain showers
6-hr Max: 69F
6-hr Min: 57F
BHO SA 1755 E35 BKN 70 132/69/54/2714G22/992/ VSBY WNW 40 MI
SHWRS DSNT WNW PK WND 2726/43/ 8/500 51007 10069 20057
SUMMARY FOR SUNDAY, SEPTEMBER 13, 2015
TEMPERATURE (DEGREES F)
MAX…..66 NORMAL…..73
MIN…..60 NORMAL…..56
MEAN….63 NORMAL…..64
DEPARTURE FROM 30-YEAR NORMAL……………………-1
TOTAL DEPARTURE FOR THE MONTH…………………..+75 [+5.6 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………+53
TOTAL COOLING UNITS FOR THE SEASON…………758 DEPARTURE……..+182
TOTAL COOLING UNITS LAST SEASON TO DATE…….565 DIFFERENCE…….+193
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….25 E AT 1:55 A.M.
ASOS……………………26 E AT 1:54 A.M.
DAVIS…………………..24 E AT 1:53 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY……………….. 19 E AT 1:52 A.M
MAXIMUM 2-MINUTE ASOS AVERAGE………………18 E AT 1:55 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 ESE AT 1:54 A.M.
AVERAGE WIND SPEED AND DIRECTION……………8.6 ESE
ASOS……………………9.3
DAVIS…………………..7.8 ESE [109 DEG]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.40 DEPARTURE…..+0.27
ASOS……………0.39
TOTAL PRECIPITATION FOR THE MONTH………..1.35 DEPARTURE…..-0.26
ASOS……………1.33
TOTAL PRECIPITATION FOR THE YEAR………..31.60 DEPARTURE…..-5.02
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 low since midnight is 60F; normal low is now 56F
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 14
HIGH 90F IN 1931
LOW 34F IN 1911
PRECIP 4.38 INCHES IN 1944 (Great Atlantic Hurricane in 1944)
PEAK GUST 96e MPH E IN 1944 (Great Atlantic Hurricane in 1944)
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)
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
