Saturday, August 9, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, AUGUST 9, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

WARM, SUNNY START TO THE WEEKEND

It’s been another pleasant, seasonably mild day today.  Once again we
began the day with mostly clear skies, and once again we’ve seen cumulus
clouds pop up during the day, with development starting as soon as
mid-morning today and plenty of these cumulus dotting the sky this
afternoon.  These clouds have not produced any rain today, however, and we
have still had plenty of sunshine all day long.  The air has been very
comfortable as well, with seasonable temperatures reaching just over the
80F mark and dew points under 60F.  The wind has been light today, and this
allowed for a sea breeze to develop earlier than usual this morning, which
has kept coastal areas a little cooler today.  August is off to a very dry
start, as showers and thunderstorms have largely dodged the summit, with
just 0.19 inches of rain recorded for the month so far, nearly an inch
below normal.

Today’s Observations:

7 A.M.
Weather: Clear, few altocumulus distant NW-E, few cirrus distant offshore NE-E
Temperature: 66F; Dew Point: 57F; Wind: WNW at 8 kts
Sea-level pressure: 30.09 ins. Hg, rising then rising more slowly
Visibility: 65 miles, light distant haze
6-hr max temp: 66F
6-hr min temp: 60F
BHO SA 1155 CLR 65 188/66/57/3008/009/ FEW AC DSNT NW-E FEW CI DSNT OFFSHR
NE-E/ 8/031 51014 10066 20060

10 A.M.
Weather: Clear, few cumulus, few altocumulus distant NW-N
Temperature: 76F; Dew Point: 57F; Wind: NE at 7 kts,
Wind: Direction variable N-ENE
Sea-level pressure: 30.10 ins. Hg, rising slightly
Visibility: 60 miles, light distant haze
BHO SA 1455 CLR 60 194/76/57/0407/010/ FEW CU FEW AC DSNT NW-N LGT DSNT HZ
WND 01V07/ 8/130 53006

1 P.M.
Weather: Scattered cumulus and moderate cumulus, few thin cirrus
Temperature: 80F; Dew Point: 58F; Wind: NE at 8 kts
Sea-level pressure: 30.08 ins. Hg, falling
Visibility: 65 miles, light distant haze
6-hr max. temp: 81F
6-hr min. temp: 66F
BHO SA 1755 55 SCT 65 187/80/58/0408/008/ FEW THN CI LGT DSNT HZ/
8/201 56007 10081 20066

WEATHER SUMMARY FOR FRIDAY, AUGUST 8, 2014

TEMPERATURE (DEGREES F)
MAX…..82    NORMAL…..81
MIN…..55    NORMAL…..63
MEAN….69    NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL…………………….-3
TOTAL DEPARTURE FOR THE MONTH……………………-10 [-1.5 DEGREE/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..4   DEPARTURE………..-3
TOTAL COOLING UNITS FOR THE MONTH………….47   DEPARTURE……….-10
TOTAL COOLING UNITS FOR THE SEASON………..384   DEPARTURE……….-24
TOTAL COOLING UNITS LAST SEASON TO DATE……526   DIFFERENCE……..-142

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………20  WNW  AT  5:02 P.M. *
ASOS…………………..22  WNW  AT  3:07 P.M.
DAVIS………………….20  NW   AT 12:41 P.M. RMY 20
FASTEST MILE FOR YESTERDAY………………..15  WNW  AT  5:04 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..15  W    AT  5:07 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….14  WNW  AT  5:05 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.6 WNW
ASOS…………………..9.5
DAVIS………………….8.4 WNW  [303 deg.] * 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 AUGUST………….0.19  DEPARTURE……….-0.99
ASOS…………..0.15
TOTAL PRECIPITATION FOR THE YEAR……….29.71  DEPARTURE……….-2.35
ASOS………….32.03

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/…./009/01              21 ESE RMY 22
8/3  71/60/66/-6/…./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  79/64/72/0/0.06/…/..               23 WNW RMY 25
8/7  79/58/69/-3/T/…/..                 22 NW  RMY 24 TSTM
8/8  82/55/69/-3/0.00/…/..              20 WNW RMY 20

8/9  morning low of 60F; the normal low is now 63F

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 9
HIGH 100F IN 1949
LOW 49F IN 1899
PRE 2.65 INS IN 1976
PEAK GUST 90 MPH SW IN 1968

RECORDS FOR AUGUST 10
HIGH 101F IN 1949 [STATION RECORD MAXIMUM – Tied with 8/2/1975] LOW 49F IN 1964
PRE 2.27 INS IN 1952
PEAK GUST 88e MPH S IN 1976

TODAY’S REPORT PREPARED BY: Jonathan O’Brien