Wednesday, July 30, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JULY 30, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

A COOL START TO THE DAY WITH 59F RECORDED
AS THE OVERNIGHT LOW

It was a calm and cool start to the day with an overnight
low of 59F recorded in our Hazen shelter. Nearly overcast
skies cleared not long after sunrise, revealing a mostly
clear sky above. Visibility has remained high at over
65 miles in all directions.

By the 1:00 PM EST observation a maximum of 76F had been
reached, 5 degrees below the daily normal maximum of 81F.
A thin layer of smoke approximately 30,000 feet or higher
was also present, giving the upper atmosphere a milky white
appearance. The presence of this layer is likely an effect
of massive wildfires in the Pacific Northwest.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, few cumulus distant N
Temperature: 63F; Dew Point: 56F; Wind: estimated WNW at 3 kts
Wind Speed: Light
Sea-level pressure: 30.01 ins. Hg, increasing, then more slowly
Visibility: 60 miles
6-hr max temp: 63F
6-hr min temp: 59F
24-hr precip: None
BHO SA 1155 80 SCT 60 163/63/56/E3103/001/ FEW CU DSNT N WND LGT/
8/160 51013 10063 20059

10 A.M.
Weather: Few cumulus in all directions, few altocumulus
distant W-N
Temperature: 72F; Dew Point: 54F; Wind: WSW at 7 kts,
Sea-level pressure: 30.01 ins. Hg, increasing unsteadily
Visibility: 70 miles
BHO SA 1455 CLR 70 164/72/54/2507/001/ FEW CU ALQDS FEW AC DSNT
W-N/ 8/160 52001

1 P.M.
Weather: Scattered cumulus, scattered altocumulus,
light smoke layer very high up overhead
Temperature: 76F; Dew Point: 50F; Wind: estimated WSW at 6 kts
Wind Speed and Direction: Light and Variable
Sea-level pressure: 30.00 ins. Hg, rising, then falling and lower
Visibility: 80 miles
6-hr max temp: 76F
6-hr min temp: 63F
BHO SA 1755 39 SCT 80 SCT 80 158/76/50/E2506/300/ LGT K LYR VRY
HIGH OHVD WND LGT AND VRB/ 8/230 58006 10076 20063

WEATHER SUMMARY FOR TUESDAY, JULY 29, 2014

TEMPERATURE (DEGREES F)
MAX…..78    NORMAL…..81
MIN…..60    NORMAL…..63
MEAN….69    NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL…………………….-3
TOTAL DEPARTURE FOR THE MONTH……………………+24 [+0.6 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..4   DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE MONTH…………218   DEPARTURE………+10
TOTAL COOLING UNITS FOR THE SEASON………..327   DEPARTURE………-10
TOTAL COOLING UNITS LAST SEASON TO DATE……471   DIFFERENCE…….-144

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………22  WNW AT  7:40 A.M.
ASOS…………………..24  WNW AT  7:39 A.M.
DAVIS………………….23  WNW AT  7:38 A.M. RMY 24
FASTEST MILE FOR YESTERDAY………………..17  WNW AT  7:40 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..17  WNW AT  7:40 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….16  WNW AT  7:40 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.9 W
ASOS…………………..10.4
DAVIS………………… 8.7 W [275 degrees]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……….-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….5.08  DEPARTURE……….+0.40
ASOS…………..5.05
TOTAL PRECIPITATION FOR THE YEAR……….29.63  DEPARTURE……….-2.02
ASOS………….29.56

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/+1/0.00/597/66              16 NW  RMY N/A
7/11 76/62/69/-3/0.00/732/81              22 NE  RMY N/A
7/12 85/60/73/+1/0.00/849/94              21 S   RMY 25
7/13 82/64/73/+1/0.01/676/75              31 S   RMY 35
7/14 83/69/76/+4/0.54/207/23              25 S   RMY 27
7/15 82/70/76/+4/0.02/135/15              26 S   RMY 29 TSTM
7/16 73/65/69/-3/0.98/000/00              27 SSW RMY 32 TSTM
7/17 79/62/71/-1/T/573/64                 15 WSW RMY 17
7/18 80/60/70/-2/0.00/822/92              15 NW  RMY 16
7/19 77/63/70/-2/0.00/054/06              13 E   RMY 14
7/20 72/60/66/-6/T/312/35                 16 ENE RMY 16
7/21 76/59/68/-4/0.00/667/75              16 E   RMY 19
7/22 88/63/76/+4/0.00/816/92              22 SSW RMY 25
7/23 88/68/78/+6/0.00/770/87              29 S   RMY 32
7/24 74/63/69/-3/0.01/291/33              18 ENE RMY 18
7/25 80/56/68/-4/0.00/…/..              18 NW  RMY N/A
7/26 82/63/73/+1/0.00/…/..              28 SSW RMY 32
7/27 75/65/70/-2/0.62/…/..              28 SSE RMY 30 TSTM
7/28 81/65/73/+1/0.10/…/..              36 S   RMY 40 TSTM
7/29 78/60/69/-3/0.00/…/..              22 WNW RMY 24

7/30 morning low of 59F; 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
7/16 NEW DAILY RECORD RAINFALL OF 0.98 ins;
surpasses previous record of 0.89 ins. in 1919

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

RECORDS FOR JULY 30
HIGH 99F IN 1949
LOW 51F IN 1956
PRECIP 1.84 INS IN 1976
PEAK GUST 70e MPH SW 1944

RECORDS FOR JULY 31
HIGH 95F IN 1917
LOW 50F IN 1895,1918
PRECIP 1.34 INS IN 1892
PEAK GUST 43e MPH WNW IN 1953, 43 SW IN 1971

TODAY’S REPORT PREPARED BY: Brian Fitzgerald