Monday, July 21, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 21, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

FOGGY START TO MONDAY TRANSITIONS TO TRANQUIL
DAY ON GREAT BLUE HILL

Fog was briefly present this morning prior to the
7:00 AM EST observation, limiting visibility to less
than 1 mile in most directions. By the observation
time most of the fog had begun to lift and burn
off revealing mostly clear skies above.

By the 1:00 PM EST observation skies were mostly
clear with only a few small cumulus near the station
with some altocumulus and cirrostratus distant and
largely south of Great Blue Hill. A maximum of 75F
had been reached by this time as well with winds
mostly off the ocean at 80 degrees east.

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, broken altocumulus
Temperature: 63F; Dew Point: 60F; Wind: estimated N at 4 kts
Wind Speed: Light
Sea-level pressure: 30.23 ins. Hg, rising, then more quickly
Visibility: 20 miles, thin fog in all directions
6-hr max temp: 63F
6-hr min temp: 59F
24-hr precip: Trace
BHO SA 1155 1 SCT E60 BKN 20 236/63/60/E3504/023/
THN FG ALQDS WND LGT/ 8/430 53011 MANUAL 7000/ 10063 20059

10 A.M.
Weather: Scattered cirrus fibratus, few cumulus in all directions,
few altocumulus distant ENE-SSW
Temperature: 73F; Dew Point: 61F; Wind: NE at 8 kts
Sea-level pressure: 30.24 ins. Hg, rising then more slowly
Visibility: 35 miles, light distant haze
BHO SA 1455 250 SCT 35 239/73/61/0508/024/ FEW CU ALQDS FEW AC
DSNT ENE-SSW LGT DSNT HZ ALQDS/ 8/131 51003

1 P.M.
Weather: Scattered cirrostratus, few cumulus ESE-N,
few altocumulus distant E-S
Temperature: 75F; Dew Point: 54F; Wind: E at 9 kts
Sea-level pressure: 30.22 ins. Hg, falling then more slowly
Visibility: 50 miles, light distant haze
6-hr max temp: 75F
6-hr min temp: 62F
BHO SA 1755 E250 SCT 50 232/75/54/0809/022/ FEW CU ESE-N FEW AC
DSNT E-S LGT DSNT HZ ALQDS/ 8/138 56007 10075 20062

WEATHER SUMMARY FOR SUNDAY, JULY 20, 2014

TEMPERATURE (DEGREES F)
MAX…..72    NORMAL…..81
MIN…..60    NORMAL…..63
MEAN….66    NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL…………………….-6
TOTAL DEPARTURE FOR THE MONTH……………………+28 [+1.2 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..1   DEPARTURE……….-7
TOTAL COOLING UNITS FOR THE MONTH…………159   DEPARTURE………+22
TOTAL COOLING UNITS FOR THE SEASON………..268   DEPARTURE……….+2
TOTAL COOLING UNITS LAST SEASON TO DATE……411   DIFFERENCE…….-143

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………16  ENE AT 6:18 P.M.*
ASOS…………………..17  ENE AT 6:18 P.M.
DAVIS………………….16  ENE AT 5:57 P.M. RMY 16
FASTEST MILE FOR YESTERDAY………………..11  ENE AT 6:30 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE……………..13  ENE AT 4:42 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….12  E   AT 2:31 P.M.
AVERAGE WIND SPEED AND DIRECTION………….7.8  ENE
ASOS………………….8.2
DAVIS…………………7.1  ENE [72 deg]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…Trace  DEPARTURE……….-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….4.35  DEPARTURE……….+0.92
ASOS…………..4.32
TOTAL PRECIPITATION FOR THE YEAR……….28.90  DEPARTURE……….-1.50
ASOS………….28.83

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/…/..                 15 WSW RMY 17
7/18 80/60/70/-2/0.00/…/..              15 NW  RMY 16
7/19 77/63/70/-2/0.00/…/..              13 E   RMY 14
7/20 72/60/66/-6/T/…/..                 16 ENE RMY 16

7/21 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 21
HIGH 100F IN 1977 [RECORD FOR MONTH] LOW 48F IN 1890
PRECIP 2.09 INS IN 1938
PEAK GUST 60e MPH WNW IN 1977

RECORDS FOR JULY 22
HIGH 99F IN 1926, 2011
LOW 52F IN 1890
PRECIP 1.73 INS IN 1900
PEAK GUST 55 MPH IN 1983

TODAY’S REPORT PREPARED BY: Brian Fitzgerald