Sunday, September 21, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, SEPTEMBER 21, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
DEW POINTS RISE INTO THE UPPER 60S, MAXIMUM OF
80F REACHED SO FAR WITH INTERMITTENT LIGHT SHOWERS
Today marks the 76th anniversary of the Great New
England Hurricane, also known as the Hurricane of 1938.
Blue Hill Observatory recorded the highest winds in
the region during this event at 121 MPH sustained
for five minutes, and the station record peak gust
of 186 MPH which was calculated from the only
anemometer to have survived the event.
*********************
Following a chilly start to Saturday morning, winds
and temperatures were on the increase with a maximum
of 71F reached by mid afternoon. Overnight two separate
light showers produced just a trace of new precipitation
through the 7:00 AM EST observation.
Light fog and a generally chaotic skies were present this
morning, with an overnight low of 60F following yesterday’s
minimum of 45F.
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, broken altocumulus,
broken cirrus, few cumulus fractus E-SE moving N, altocumulus
distant WSW-NW
Temperature: 68F; Dew Point: 64F; Wind: S at 15G22 kts,
Sea-level pressure: 29.94 ins. Hg, falling, then more slowly
Visibility: 30 miles, 20 miles SW-N, light fog in all directions
6-hr max temp: 68F
6-hr min temp: 61F
24-hr precip: Trace
BHO SA 1155 34 SCT E75 BKN 250 BKN 30 140/68/64/1715G22/994/
LGT FG ALQDS VSBY SW-N 20 MI FEW CUFRA E-SE MOV N ACSL DSNT WSW-NW/
8/771 56011 MANUAL 7000/ 10068 20061
10 A.M.
Weather: Scattered cumulus, scattered altocumulus,
broken cirrocumulus, few small cumulus in all directions,
few moderate cumulus WSW-WNW
Temperature: 80F; Dew Point: 66F; Wind: S at 14G22 kts,
Sea-level pressure: 29.90 ins. Hg, falling, then more rapidly
Visibility: 30 miles, hazy in all directions
BHO SA 1455 34 SCT 100 SCT E250 BKN 30 126/80/66/1714G22/990/
FEW SML CU ALQDS FEW MDT CU WSW-WNW HAZY ALQDS/ 8/239 58014
1 P.M.
Weather: Scattered cumulus, scattered altocumulus, overcast
translucent cirrostratus, sun dimly visible
Temperature: 77F; Dew Point: 68F; Wind: SSE at 9G19 kts,
Sea-level pressure: 29.79 ins. Hg, falling, then more rapidly
Visibility: 30 miles, hazy in all directions
6-hr max temp: 80F
6-hr min temp: 68F
6-hr precip: Trace
BHO SA 1755 29 SCT 110 SCT E220 OVC 30 087/77/68/1609G19/979/
HAZY ALQDS SUN DMLY VSBL/ 8/177 58039 MANUAL 6000/ 10080 20068
WEATHER SUMMARY FOR SATURDAY, SEPTEMBER 20, 2014
TEMPERATURE (DEGREES F)
MAX…..71 NORMAL…..70
MIN…..45 NORMAL…..53
MEAN….58 NORMAL…..62
DEPARTURE FROM 30-YEAR NORMAL…………………….-4
TOTAL DEPARTURE FOR THE MONTH……………………+24 [+1.0 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE………..-1
TOTAL COOLING UNITS FOR THE MONTH………….86 DEPARTURE……….+35
TOTAL COOLING UNITS FOR THE SEASON………..565 DEPARTURE……….-23
TOTAL COOLING UNITS LAST SEASON TO DATE……694 DIFFERENCE……..-130
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………7 DEPARTURE……….+2
TOTAL HEATING UNITS FOR THE MONTH…………..61 DEPARTURE……….+9
TOTAL HEATING UNITS FOR THE SEASON………….63 DEPARTURE………-14
TOTAL HEATING UNITS LAST SEASON TO DATE……..76 DIFFERENCE……..-13
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………29 S AT 4:40 P.M.
ASOS…………………..31 S AT 4:03 P.M.
DAVIS………………….29 S AT 4:04 P.M. RMY 30
FASTEST MILE FOR YESTERDAY………………..23 S AT 4:41 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..23 S AT 3:46 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….22 S AT 3:46 P.M.
AVERAGE WIND SPEED AND DIRECTION………….14.8 SSE
ASOS………………….14.6
DAVIS…………………13.3 S (177 degrees)
* last of several occurrences
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…TRACE DEPARTURE……….-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.20 DEPARTURE……….-2.38
ASOS…………..0.18
TOTAL PRECIPITATION FOR THE YEAR……….31.38 DEPARTURE……….-6.22
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 71/58/65/0/0.00/329/43 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 morning low temp: 60F since midnight; normal low now 53F
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 21
HIGH 91 IN 1895
LOW 35 IN 1929, 1956, 1962
PRECIP 5.58 INS IN 1961 (HURRICANE ESTHER; RETURNED AS TS SEPT 25-26TH)
PEAK GUST 186 MPH S IN 1938 (GREAT NEW ENGLAND HURRICANE; CALCULATED GUST, STATION RECORD)
RECORDS FOR SEPTEMBER 22
HIGH 90F IN 1895, 1914
LOW 30F IN 1904 (Earliest freeze)
PRECIP 1.16 INCHES IN 2001
PEAK GUST 60 MPH SSW IN 1989
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
