Monday, July 10, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 10, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

WARMER DAY WITH INCREASING CLOUDS

Today saw another clear start to the day.  Skies were
mostly sunny with a few cirrus clouds during the 7:00AM
EST observation.  Cumulus began to form in the late morning,
and by early afternoon skies had become partly sunny with a
mix of cumulus and cirrus.

Temperatures had already risen to 84F by 1:00PM and could
rise a couple more degrees this afternoon due to the partly
sunny skies.  Dew points remained in the upper 50s making
this summer day feel quite pleasant.  Light haze limited
visibility to 60 miles as air from the southwest entered
the region.

Today’s Observations:

7 A.M.
Weather: Few cirrus in all directions
Temperature: 70F; Dew Point: 59F; Wind: SW at 7 kts
Sea-level pressure: 30.06 ins. Hg, rising unsteadily
Visibility: 70 miles, distant fog in all directions
6-hr Max temp: 70F
6-hr Min temp: 63F
24-hr precip: 0.00 inches
BHO SA 1155 CLR 70 178/70/59/2207/006/ FEW CI ALQDS DSNT FG ALQDS/
8/001 52001 10070 20063

10 A.M.
Weather: Few cumulus in all directions, few cirrus W-NE, few distant
cirrus ESE-SSW
Temperature: 81F; Dew Point: 56F; Wind: SSW at 9 kts
Sea-level pressure: 30.06 ins. Hg, rising then falling
Visibility: 60 miles, distant haze in all directions
BHO SA 1455 CLR 60 178/81/56/2109/006 FEW CU ALQDS FEW CI W-NE
FEW DSNT CI ESE-SSW DSNT HZ ALQDS/ 8/101 50000

1 P.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 81F; Dew Point: 55F; Wind: SW at 10G18 kts
Sea-level pressure: 30.03 ins. Hg, falling, then more quickly
Visibility: 60 miles, distant haze in all directions
6-hr Max temp: 84F
6-hr Min temp: 70F
BHO SA 1755 64 SCT 250 SCT 60 168/81/55/2210G18/003/ DSNT HZ ALQDS/
8/101 58010 10084 20070

SUMMARY FOR SUNDAY, JULY 9, 2017

TEMPERATURE (DEGREES F)
MAX…..81   NORMAL…..80
MIN…..60   NORMAL…..63
MEAN….71   NORMAL…..72

DEPARTURE FROM 30-YEAR NORMAL…………………….-1
TOTAL DEPARTURE FOR THE MONTH……………………+17 [+1.7 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………6   DEPARTURE……….-1
TOTAL COOLING UNITS FOR THE MONTH…………..71   DEPARTURE………+14
TOTAL COOLING UNITS FOR THE SEASON…………272   DEPARTURE………+86
TOTAL COOLING UNITS LAST SEASON TO DATE…….213   DEPARTURE………+59

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….26 W AT  4:05 P.M.
AERO……………………26 W AT  4:05 P.M.
ASOS……………………27 W AT  4:05 P.M.
DAVIS…………………..25 W AT  4:04 P.M. RMY 26
FASTEST MILE FOR YESTERDAY…………………18 W AT 12:33 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………18 W AT  4:06 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 W AT  3:47 P.M.
AVERAGE WIND SPEED AND DIRECTION………….11.5 W
ASOS………………….11.4
DAVIS…………………10.1 W [271 DEG.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.11
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.78  DEPARTURE……-0.21
ASOS…………..0.76
TOTAL PRECIPITATION FOR THE YEAR……….32.15  DEPARTURE……+4.19
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR JULY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system 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
M:    Missing data

7/1  85/67/76/+6/T/439/48                  35 S   AERO 37 S   RMY 38
7/2  87/69/78/+8/T/785/86                  25 W*  AERO 28 W*  RMY 27
7/3  85/67/76/+5/0.00/894/98               28 W*  AERO 29 W   RMY 30
7/4  84/62/73/+2/0.00/783/86               17 W   AERO 17 W   RMY 18
7/5  82/62/72/+1/0.00/855/94               20 S   AERO 20 ENE RMY 20
7/6  82/60/71/+6/0.00/664/73               21 SSW AERO 22 SSW RMY 21
7/7  71/60/66/-5/0.63/000/00               28 ENE AERO 28 ENE RMY 27
7/8  84/61/73/+1/0.15/…/..               30 SW* AERO 32 SSW RMY 33
7/9  81/60/71/-1/0.00/…/..               26 W   AERO 26 W   RMY 26

7/10 Low temp since midnight is 63F; normal low is now 63F

DAILY RECORDS FOR JULY

None so far.

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

RECORDS FOR JULY 10
HIGH 99F IN 1911
LOW 46F IN 1890
PRECIP 1.95 INS IN 2015
WIND 75 MPH W IN 1985

RECORDS FOR JULY 11
HIGH 98F IN 1911
LOW 49F IN 1890
PRECIP 1.87 INS IN 1959
WIND 53 MPH NW IN 1988

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle