Wednesday, August 20, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, AUGUST 20, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
SLIGHT MODERATION IN TEMPERATURE TODAY,
THOUGH SUN AND DRY CONDITIONS PERSIST
A strong inversion was in place for the second
morning in a row today, capping a smokey and hazy
layer of air approximately 100 feet below the summit.
Conditions at Norwood Memorial Airport allowed for an
overnight low of 47F, while the summit of Great Blue
Hill saw 58F.
Another day without rainfall yesterday has dropped
our station’s monthly deficit to -1.24 inches. With little
change expected in the pattern through the rest of the
month, August could end in a significantly dry way.
Today’s Observations:
7 A.M.
Weather: Few cirrus fibratus in all directions,
inversion present and estimated 500 ft over city to the N,
dark smoke layer WNW-NNE
Temperature: 65F; Dew Point: 57F; Wind: estimated NNE at 3 kts
Wind Speed: Light
Sea-level pressure: 30.02 ins. Hg, rising, then more slowly
Visibility: 40 miles, dark smoke layer WNW-NNE, 50 miles NE-SSW
6-hr max temp: 65F
6-hr min temp: 58F
24-hr precip: None
BHO SA 1155 CLR 40 165/65/57/E0203/002/
FEW CI ALQDS INVSN PRSNT ESTMTD TOP 5 HND OVR CTY N
DRK K LYR WNW-NNE VSBY NE-SSW 50 MI WND LGT/
8/001 51011 10065 20058
10 A.M.
Weather: Scattered cirrus, few small cumulus in all directions
Temperature: 74F; Dew Point: 57F; Wind: estimated NNE at 6 kts
Wind Speed and Direction: Light and Variable
Sea-level pressure: 30.04 ins. Hg, rising steadily
Visibility: 60 miles, 40 miles WSW-N, obscured by thin smoke layer
BHO SA 1455 250 SCT 60 172/74/57/E0306/004/
FEW SML CU ALQDS THN K LYR WSW-N VSBY WSW-N 40 MI WND LGT AND VRB/
8/104 52007
1 P.M.
Weather: Few small cumulus SE-NNE, few cirrus in all directions
Temperature: 78F; Dew Point: 56F; Wind: NNE at 7 kts
Sea-level pressure: 30.04 ins. Hg, same as 3 hours ago
Visibility: 50 miles, light distant haze
6-hr max. temp: 78F
6-hr min. temp: 65F
BHO SA 1755 CLR 50 172/78/56/0307/004/
FEW SML CU SE-NNE FEW CI ALQDS LGT DSNT HZ ALQDS/
8/101 50000 10078 20065
WEATHER SUMMARY FOR TUESDAY, AUGUST 19, 2014
TEMPERATURE (DEGREES F)
MAX…..78 NORMAL…..79
MIN…..54 NORMAL…..62
MEAN….66 NORMAL…..70
DEPARTURE FROM 30-YEAR NORMAL…………………….-4
TOTAL DEPARTURE FOR THE MONTH……………………-36 [-2.1 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..1 DEPARTURE………..-5
TOTAL COOLING UNITS FOR THE MONTH………….87 DEPARTURE……….-40
TOTAL COOLING UNITS FOR THE SEASON………..424 DEPARTURE……….-54
TOTAL COOLING UNITS LAST SEASON TO DATE……562 DIFFERENCE……..-138
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………17 WNW AT 10:48 A.M.
ASOS…………………..18 W AT 10:49 A.M.
DAVIS………………….17 WNW AT 10:40 A.M. RMY 17
FASTEST MILE FOR YESTERDAY………………..13 SE AT 8:17 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..13 SE AT 7:52 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….12 SE AT 8:38 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.5 WNW
ASOS…………………..7.7
DAVIS………………….6.6 NW [305 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……….-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR AUGUST………….1.38 DEPARTURE……….-1.24
ASOS…………..1.35
TOTAL PRECIPITATION FOR THE YEAR……….31.01 DEPARTURE……….-2.60
ASOS………….31.26
PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
8/1 86/63/75/+3/0.00/598/69 25 S RMY 29
8/2 68/59/64/-8/0.11/009/01 21 ESE RMY 22
8/3 71/60/66/-6/0.01/104/12 12 SE RMY 12
8/4 83/64/74/+2/0.00/550/64 20 S RMY 21
8/5 87/66/77/+5/0.00/798/93 17 S RMY 19
8/6 79/64/72/0/0.07/462/54 23 WNW RMY 25
8/7 79/58/69/-3/T/589/69 22 NW RMY 24 TSTM
8/8 82/55/69/-3/0.00/817/96 20 WNW RMY 20
8/9 82/60/71/-1/0.00/730/86 16 WNW RMY 17
8/10 84/63/74/+3/0.00/770/91 15 W RMY N/A
8/11 85/63/74/+3/0.00/667/79 25 S RMY 29
8/12 81/64/73/+2/0.00/387/46 25 SSE RMY N/A
8/13 69/61/65/-6/1.09/000/00 35 ESE RMY 37
8/14 73/57/65/-6/0.00/828/99 27 W RMY 29
8/15 74/56/65/-6/0.09/…/.. 23 W RMY 23 TSTM
8/16 76/56/66/-5/…./…/.. 24 SW RMY 27
8/17 78/60/69/-2/…./…/.. 21 WNW RMY 23
8/18 77/56/67/-4/0.00/…/.. 23 WNW RMY 25
8/19 78/54/66/-4/0.00/…/.. 17 WNW RMY 17
8/20 morning low of 58F; the normal low is now 62F
DAILY RECORDS FOR AUGUST 2014:
None so far.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR AUGUST 20
HIGH 93F IN 1937
LOW 48F IN 1896, 1905, 1949
PRECIP 2.71 INCHES IN 1970
PEAK GUST 47 MPH W IN 1983
RECORDS FOR AUGUST 21
HIGH 92F IN 1937, 1995
LOW 47F IN 1982
PRECIP 2.84 INCHES IN 1888
PEAK GUST 54 MPH WSW IN 2004
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
