Tuesday, September 16, 2014

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, SEPTEMBER 16, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

ONLY A TRACE RECORDED AT BHO SO FAR THIS MORNING
AS DRY SPELL CONTINUES

Between 9:00 and 10:00 EST this morning a few drops
of rain were all that were found on our ombroscope,
our analog precipitation-recording device. Following
yesterday’s sun-fill day our deficit at Blue Hill increases
once again to -1.68 inches for the month and -5.52 inches
for the year.

By the 1:00 PM EST observation a maximum of 66F had been reached
under mostly cloudy skies with showers distant to the SW and NNE-ESE.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus, few altocumulus lenticularis
distant WSW-NE, few altocumulus castellanus distant SE
Temperature: 56; Dew Point: 50F; Wind: estimated S at 5 kts
Wind Speed: Light
Sea-level pressure: 30.05 ins. Hg, falling, then more quickly
Visibility: 40 miles, thin fog in all directions
6-hr max temp: 56F
6-hr min temp: 52F
24-hr precip: 0.00 in.
BHO SA 1155 E160 BKN 40 177/56/50/E1805/005/ FEW ACSL DSNT WSW-NE
FEW ACC DSNT SE THN FG ALQDS WND LGT/ 8/070 58005 10056 20052

10 A.M.
Weather: Broken altocumulus, thin overcast of altostratus/
nimbostratus, few cumulus ENE-SW, light spots in overcast WSW,
showers distant SW-NNE
Temperature: 63F; Dew Point: 49F; Wind: estimated SW at 5 kts
Wind Speed: Light
Sea-level pressure: 30.03 ins. Hg, falling, then more quickly
Visibility: 50 miles, 25 miles SW-NNE, obscured by showers
and thin fog
3-hr precip: Trace
BHO SA 1455 E65 BKN 110 -OVC 50 169/63/49/E2305/003/
SHWRS DSNT SW-NNE VSBY SW-NNE 25 MI FEW CU ENE-SW
LGT SPTS INOVC WSW THN FG ALQDS WND LGT/ 8/17/ 58008 MANUAL 6000/

1 P.M.
Weather: Scattered moderate cumulus, broken altocumulus,
broken altocumulus, showers distant SW and NNE-ESE
Temperature: 64F; Dew Point: 53F; Wind: estimated NNW at 6 kts
Wind Speed: Light
Sea-level pressure: 29.98 ins. Hg, falling, then more slowly
Visibility: 25 miles, 50 miles SE-SW, obscured by thin fog
and distant showers
6-hr max temp: 66F
6-hr min temp: 56F
6-hr precip: Trace
BHO SA 1755 40 SCT E90 BKN 140 BKN 25 154/64/53/E3306/998/
SHWRS DSNT SW AND NNE-ESE VSBY SW-SE 50 MI THN FG ALQDS WND LGT/
8/270 56015 MANUAL 6000/ 10066 20056

WEATHER SUMMARY FOR MONDAY, SEPTEMBER 15, 2014

TEMPERATURE (DEGREES F)
MAX…..67    NORMAL…..72
MIN…..43    NORMAL…..55
MEAN….55    NORMAL…..64

DEPARTURE FROM 30-YEAR NORMAL…………………….-9
TOTAL DEPARTURE FOR THE MONTH……………………+45 [+2.8 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0   DEPARTURE………..-2
TOTAL COOLING UNITS FOR THE MONTH………….86   DEPARTURE……….+43
TOTAL COOLING UNITS FOR THE SEASON………..565   DEPARTURE……….-15
TOTAL COOLING UNITS LAST SEASON TO DATE……694   DIFFERENCE……..-129

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..10  DEPARTURE……….+7
TOTAL HEATING UNITS FOR THE MONTH…………..27  DEPARTURE……….-4
TOTAL HEATING UNITS FOR THE SEASON………….29  DEPARTURE………-27
TOTAL HEATING UNITS LAST SEASON TO DATE……..47  DIFFERENCE……..-18

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………17 W   AT  1:49 P.M. *
ASOS…………………..18 W   AT  1:45 P.M.
DAVIS………………….16 W   AT  1:45 P.M. RMY 18
FASTEST MILE FOR YESTERDAY………………..14 ESE AT 10:12 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..13 SE  AT 11:38 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….12 SE  AT  9:49 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.9 ESE
ASOS…………………..8.4
DAVIS………………….4.1 E (103 degrees)
* last of several occurrences

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 THE MONTH……….0.20  DEPARTURE……….-1.68
ASOS…………..0.18
TOTAL PRECIPITATION FOR THE YEAR……….31.38  DEPARTURE……….-5.52
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/…/..               20 NE  RMY 20
9/11 78/60/69/+4/0.00/…/..              31 SW  RMY 35
9/12 72/51/62/-3/0.00/…/..              25 NNW RMY 22
9/13 67/50/59/-5/0.17/…/..              23 E   RMY 24
9/14 66/47/57/-7/0.00/…/..              25 NW  RMY 24
9/15 67/43/55/-9/0.00/…/..              17 W   RMY 18

9/16  morning low temp: 52F since midnight; normal low now 55F

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 16
HIGH 91F IN 1939,1941
LOW 39F IN 1984
PRECIP 5.12 INCHES IN 1933 (Hurricane)
PEAK GUST 59 MPH SSE IN 1999

RECORDS FOR SEPTEMBER 17
HIGH 86F IN 1915,1941,1991
LOW 38F IN 1959
PRECIP 2.73 INCHES IN 1933
PEAK GUST 60 MPH WNW IN 1999

TODAY’S REPORT PREPARED BY: Brian Fitzgerald