Monday, August 14, 2017

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, AUGUST 14, 2017
ALL TIMES ARE IN EASTERN STANDARD TIME

SKIES MOSTLY CLOUDY WITH CIRRUS FROM TROPICAL STORM GERT

Skies were mostly cloudy all morning and overcast by early
afternoon with high cirrus and cirrostratus clouds preceding
TS Gert.  A partial halo was spotted around the sun during
the 1:00PM EST observation.

Overnight temperatures were again on the warm side with a
minimum of reading 68F around 5:00AM.  Winds became quite
low during the early morning hours and averaged about 5 MPH.
They have been slow to pick up and have reached a peak gust
of only 13 MPH so far today.

Today’s Observations:

7 A.M.
Weather: Few cumulus SSE-W, scattered altostratus, broken dense cirrus,
higher layer of broken cirrus
Temperature: 71F; Dew Point: 58F; Wind: estimated ENE at 1 kt,
Wind: Light and variable
Sea-level pressure: 30.07 ins. Hg, rising unsteadily
Visibility: 70 miles, thin smoke layer along horizon
6-hr Max temp: 71F
6-hr Min temp: 68F
24-hr precip: 0.00 in.
BHO SA 1155 180 SCT E220 BKN 250 BKN 70 184/71/58/E0601/007/
FEW CU SSE-W THN K LYR ALG HRZN WND L/V/ 8/112 52010 10071 20068

10 A.M.
Weather: Few cumulus SW, broken altostratus, broken dense cirrus,
broken cirrostratus
Temperature: 76F; Dew Point: 57F; Wind: estimated SSE at 3 kts,
Wind speed: Light
Sea-level pressure: 30.07 ins. Hg, falling unsteadily
Visibility: 70 miles
BHO SA 1455 E150 BKN 220 BKN 250 BKN 70 183/76/57/E1503/007/
FEW CU SW WND LGT/ 8/118 58001

1 P.M.
Weather: Scattered cumulus, scattered altocumulus, broken dense cirrus,
overcast cirrostratus, partial halo around sun
Temperature: 81F; Dew Point: 55F; Wind: SSW at 5 kts,
Wind Speed: Light
Sea-level pressure: 30.03 ins. Hg, steady then falling
Visibility: 70 miles
6-hr Max temp: 81F
6-hr Min temp: 71F
BHO SA 1755 59 SCT 150 SCT E220 BKN 250 OVC 70 170/81/55/2005/003/
PARTIAL HALO WND LGT/ 8/137 58013 10081 20071

SUMMARY FOR SUNDAY, AUGUST 13, 2017

TEMPERATURE (DEGREES F)
MAX…..84   NORMAL…..80
MIN…..67   NORMAL…..62
MEAN….76   NORMAL…..71

DEPARTURE FROM 30-YEAR NORMAL…………………….+5
TOTAL DEPARTURE FOR THE MONTH…………………….+1 [-0.1 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..11   DEPARTURE……….+5
TOTAL COOLING UNITS FOR THE MONTH…………..88   DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE SEASON…………509   DEPARTURE………+67
TOTAL COOLING UNITS LAST SEASON TO DATE…….605   DEPARTURE………-96

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….26 WNW AT 11:58 A.M.
AERO……………………24 WNW AT 11:58 A.M.
ASOS……………………27  W  AT 11:59 A.M.
DAVIS…………………..25  W  AT 11:58 A.M. RMY 26
FASTEST MILE FOR YESTERDAY…………………16  W  AT 11:45 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………18  W  AT 11:45 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..17  W  AT 11:45 A.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.6 WNW
ASOS…………………..9.8
DAVIS………………….8.4  W [282 DEG.] *last of multiple occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.12
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.39  DEPARTURE……-0.45
ASOS…………..1.38
TOTAL PRECIPITATION FOR THE YEAR……….36.15  DEPARTURE……+3.32
ASOS……………N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1  87/65/76/+4/0.00/762/88               16 ESE*AERO 16 NNW RMY 16
8/2  86/65/76/+4/1.09/372/43               32 W   AERO 36 W   RMY 34 TSTM
8/3  83/65/74/+2/0.00/552/64               22 S   AERO 23 S   RMY 24
8/4  84/66/75/+3/0.00/697/81               26 S   AERO 30 S   RMY 29
8/5  75/63/69/-3/0.10/060/07               23 NW  AERO 28 NW  RMY 29
8/6  76/57/67/-5/0.00/795/93               30 NW  AERO 32 NW  RMY 31
8/7  76/60/68/-4/0.01/597/70               28 SSW AERO 28 SSW RMY 29
8/8  74/60/67/-5/0.02/000/00               17 S   AERO 16 SSE RMY 16
8/9  83/58/71/-1/0.00/…/..               18 S   AERO 18 S   RMY 19
8/10 86/63/75/+4/T/…/..                  20 S   AERO 18 S   RMY 20
8/11 82/63/73/+2/0.00/…/..               17 S   AERO 16 S   RMY 17
8/12 75/57/66/-5/0.17/…/..               22 SSW*AERO 22 SSW RMY 23
8/13 84/67/76/+5/0.00/…/..               26 WNW AERO 24 WNW RMY 26

8/14  Low temp since midnight is 68F; normal low is now 62F

DAILY RECORDS FOR AUGUST

None so far.

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

RECORDS FOR AUGUST 14
HIGH 99F IN 2002
LOW 46F IN 1964
PRECIP 3.06 INCHES IN 1919
PEAK GUST 61 MPH WNW IN 1963

RECORDS FOR AUGUST 15
HIGH 95F IN 1928
LOW 47F IN 1964
PRECIP 1.89 INCHES IN 2011
PEAK GUST 44e MPH S IN 1941

TODAY’S REPORT PREPARED BY: Cecilia Borries-Strigle