Tuesday, July 15, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JULY 15, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

HEAVY SHOWERS BRING 0.56 INCHES OF NEW RAIN…
HUMIDITY AND HIGH DEW POINTS LINGER

Humidity has remained in place today following a round
of heavy showers late yesterday afternoon that dropped
at quick half inch of rain.

Fog and drizzle was in place by the 7:00 AM EST observation
this morning with visibility reduced to 1/8 of a mile
in most directions. Dew points once again made their
way into the lower to mid 70s.

Today’s Observations:

7 A.M.
Weather: Fog and light drizzle
Temperature: 73F; Dew Point: 72F; Wind: SSW at 10 kts
Sea-level pressure: 29.83 ins. Hg, falling, then more slowly
Visibility: 1/8 of a mile, 1/4 mile SSW, obscured by fog
6-hr max temp: 73F
6-hr min temp: 70F
24-hr precip: 0.56 inches
BHO SA 1155 W3 X 1/8L-F 102/73/72/2110/983/ VSBY SSW ¼ MI PRCP VRY LGT/
8//// 55001 ASOS 60002 70056 MANUAL 70056 10073 20070

10 A.M.
Weather: Overcast stratus, intermittent fog
Temperature: 74F; Dew Point: 73F; Wind: SSW at 11 kts
Sea-level pressure: 29.84 ins. Hg, rising, then falling
Visibility: 2 miles, 8 miles SW-NNW, intermittent fog
3-hr precip: Trace
BHO SA 1455 E3 OVC 2 104/74/73/2111/984/ VSBY SW-NNW 8 MI FOG INTMT/
8/6// 53002 MANUAL 6000/

1 P.M.
Weather: Broken stratocumulus, broken altocumulus,
thin overcast cirrus fibratus
Temperature: 80F; Dew Point: 73F; Wind: S at 13G19 kts,
Sea-level pressure: 29.82 ins. Hg, falling then more slowly
Visibility: 20 miles, hazy in all directions
6-hr max temp: 81F
6-hr min temp: 72F
6-hr precip: Trace
BHO SA 1755 E20 BKN 55 BKN 250 -OVC 20 098/80/73/1813G19/982/
VSBY NNW-NNE 15 MI HAZY/ 8/811 56006 MANUAL 6000/ 10081 20072

WEATHER SUMMARY FOR MONDAY, JULY 14, 2014

TEMPERATURE (DEGREES F)
MAX…..83    NORMAL…..81
MIN…..69    NORMAL…..63
MEAN….76    NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL…………………….+4
TOTAL DEPARTURE FOR THE MONTH……………………+38 [+2.5 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY………….11   DEPARTURE……….+4
TOTAL COOLING UNITS FOR THE MONTH…………127   DEPARTURE………+34
TOTAL COOLING UNITS FOR THE SEASON………..236   DEPARTURE………+14
TOTAL COOLING UNITS LAST SEASON TO DATE……302   DIFFERENCE……..-66

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………25 S   AT 12:22 A.M.*
ASOS…………………..29 S   AT 12:13 A.M.
DAVIS…………………. N/A           RMY 27
FASTEST MILE FOR YESTERDAY………………..22 S   AT 1:17 A.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE……………..22 SSW AT 12:48 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………. N/A
AVERAGE WIND SPEED AND DIRECTION………….11.5 S
ASOS………………….11.5
DAVIS…………………10.6 SSW [202 deg]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.56  DEPARTURE……….+0.42
ASOS…………..0.56
TOTAL PRECIPITATION FOR THE MONTH……….3.37  DEPARTURE……….+1.71
ASOS…………..3.36
TOTAL PRECIPITATION FOR THE YEAR……….27.92  DEPARTURE……….-0.71
ASOS………….28.22

PRELIMINARY CLIMATE SUMMARY FOR JULY 2014 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

7/1  85/66/76/+6/0.00/695/76              31 SSW RMY 36
7/2  89/69/79/+9/T/639/70                 33 SSW RMY 38
7/3  91/68/80/+9/0.05/611/67              29 W   RMY 30  TSTM
7/4  72/61/67/-4/2.48/027/03              28 N   RMY N/A TSTM
7/5  77/55/66/-5/0.27/738/81              36 NW  RMY N/A
7/6  83/61/72/+1/0.00/892/98              29 SW  RMY 33
7/7  85/65/75/+4/T/563/62                 33 SW  RMY 38  TSTM [NO RAIN] 7/8  89/70/80/+8/0.00/763/84              31 SW  RMY 38
7/9  86/70/78/+6/0.00/779/86              28 SSW RMY N/A
7/10 80/65/73/+1/0.00/…/..              16 NW  RMY N/A
7/11 76/62/69/-3/0.00/…/..              22 NE  RMY N/A
7/12 85/60/73/+1/0.00/…/..              21 S   RMY 25
7/13 82/64/73/+1/…./…/..              31 S   RMY 35
7/14 83/69/76/+4/…./…/..              25 S   RMY 27

7/15: morning low of 70F; the normal low is now 63F

DAILY RECORDS FOR JULY 2014
7/4- NEW DAILY RECORD RAINFALL OF 2.48 ins;
surpasses previous record of 1.78 ins. in 1950

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR JULY 15
HIGH 94F IN 1995
LOW 50F IN 1929, 1930
PRECIP 1.64 INS IN 1896
WIND 71 MPH WNW IN 2002

RECORDS FOR JULY 16
HIGH 94F IN 1968, 1980, 1983, 1999
LOW 50F IN 1889, 1903
PRECIP 0.89 INS IN 1919
WIND 48e MPH SW 1944

TODAY’S REPORT PREPARED BY: Brian Fitzgerald