Saturday, September 20, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, SEPTEMBER 20, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
SUNNY AND WARMER TODAY AS TEMPS CLIMB BACK INTO THE 60s
After an unseasonably cold day on Friday, a high pressure system
has helped bring temperatures back into the mid-to-upper 60s
on Saturday. Skies have been mostly clear throughout the morning
hours with a only a few altocumulus clouds. Winds are averaging
11.9 MPH out of the southeast, while the visibility has hovered
around 25-30 miles.
Tomorrow is the 76th anniversary of the Great Hurricane of 1938.
Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus all quadrants
Temperature: 52F; Dew Point: 43F; Wind: SE at 12 kts,
Sea-level pressure: 30.35 ins. Hg, falling, then more rapidly
Visibility: 25 miles, distant haze
6-hr max temp: 52F
6-hr min temp: 45F
24-hr precip: 0.00
BHO SA 1155 CLR 280/52/43/1412/035 FEW AC ALQDS DSNT HZ/
8/030 58010 10052 20045
10 A.M.
Weather: Clear, few altocumulus distant SW-NW, few cumulus
distant SE
Temperature: 64F; Dew Point: 48F; Wind: S at 10 kts,
Sea-level pressure: 30.32 ins. Hg, falling, then more rapidly
Visibility: 30 miles
BHO SA 1455 CLR 267/64/48/1810/032 FEW AC SW-NW FEW CU SE
LGT HZ/ 8/130 58013
WEATHER SUMMARY FOR FRIDAY, SEPTEMBER 19, 2014
TEMPERATURE (DEGREES F)
MAX…..56 NORMAL…..71
MIN…..43 NORMAL…..54
MEAN….50 NORMAL…..62
DEPARTURE FROM 30-YEAR NORMAL……………………-12
TOTAL DEPARTURE FOR THE MONTH……………………+28 [+1.3 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……….+37
TOTAL COOLING UNITS FOR THE SEASON………..565 DEPARTURE……….-21
TOTAL COOLING UNITS LAST SEASON TO DATE……694 DIFFERENCE……..-129
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..15 DEPARTURE……….11
TOTAL HEATING UNITS FOR THE MONTH…………..54 DEPARTURE………..7
TOTAL HEATING UNITS FOR THE SEASON………….56 DEPARTURE………-16
TOTAL HEATING UNITS LAST SEASON TO DATE……..76 DIFFERENCE……..-20
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………21 NE AT 7:40 A.M.
ASOS…………………..23 NE AT 7:41 A.M.
DAVIS………………….21 NE AT 7:41 A.M. RMY 23
FASTEST MILE FOR YESTERDAY………………..15 SE AT 11:35 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..16 NE AT 11:13 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….15 NNE AT 11:14 A.M.
AVERAGE WIND SPEED AND DIRECTION………….10.8
ASOS…………………..9.8
DAVIS………………….8.8 NE (051 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……….-2.24
ASOS…………..0.18
TOTAL PRECIPITATION FOR THE YEAR……….31.38 DEPARTURE……….-6.08
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 morning low temp: 43F 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 20
HIGH 90 IN 1983
LOW 34 IN 1979
PRECIP 4.57 INS IN 1899
PEAK GUST 44 MPH NE IN 1972
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)
TODAY’S REPORT PREPARED BY: Eli Melaas
