Thursday, June 14, 2018

| June 14, 2018 |

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JUNE 14, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

DRY WEATHER WITH INCREASING CLOUDS TODAY AND WINDS REMAINING GUSTY

Dry and comfortable weather has returned today after the more humid air of
yesterday. After a mild start to the morning, with a low of 64F, we have
risen to a high of 77F so far. Most of this rise came in the morning, and
in fact we have dropped a few degrees this afternoon. This is due to an
increase in stratocumulus clouds, which had mostly blocked out the Sun shortly
after noontime. Yesterday provided the first rain at Blue Hill since June 5,
but it was only a trace, as this lengthy dry spell continues. Winds have been
gusty for the third day in a row, with gusts close to 35mph today and sustained
winds again around 15mph. The barometric pressure has been steady but low
today, with a low pressure system to our north slow to depart and contributing
to the increase in clouds this afternoon.

Today’s Observations:

7 A.M.
Weather: Mostly clear, few stratocumulus distant S and W-NNE,
few altocumulus distant SE-S and NW-NE
Temperature: 68F; Dew Point: 53F; Wind: W at 13G23 kts
Sea-level pressure: 29.66 ins. Hg, rising then more slowly
Visibility: 75 miles
6-hr Max temp: 68F
6-hr Min temp: 64F
24-hr Precip: Trace
BHO SA 1155 CLR 75 045/68/53/2713G23/966/ FEW SC DSNT S AND W-NNE
FEW AC DSNT SE-S AND NW-NE/ 8/530 51008 MANUAL 6000/ 10068 20064

10 A.M.
Weather: Scattered stratocumulus, few altocumulus distant NW-NE
Temperature: 75F; Dew Point: 52F; Wind: W at 13G22 kts,
Peak Wind: 29 kts W at 9:39 A.M.
Sea-level pressure: 29.67 ins. Hg, about steady
Visibility: 65 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 55 SCT 65 047/75/52/2813G22/967/ FEW AC DSNT NW-NE
PK WND 2829/39/ 8/530 53002

1 P.M.
Weather: Broken stratocumulus, few lower stratocumulus
Temperature: 73F; Dew Point: 51F; Wind: WNW at 14G28 kts,
Peak Wind: 28 kts W at 12:51 P.M.
Sea-level pressure: 29.66 ins. Hg, about steady
Visibility: 65 miles
6-hr Max temp: 77F
6-hr Min temp: 68F
6-hr precip: 0.00 ins.
BHO SA 1755 E65 BKN 65 045/73/51/2914G28/966/ FEW LWR SC
PK WND 2828/51/ 8/5// 55002 10077 20068

SUMMARY FOR WEDNESDAY, JUNE 13, 2018

TEMPERATURE (DEGREES F)
MAX…..74   NORMAL…..74
MIN…..56   NORMAL…..56
MEAN….65   NORMAL…..65

DEPARTURE FROM 30-YEAR NORMAL……………………..0
TOTAL DEPARTURE FOR THE MONTH……………………-28 [-2.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..0   DEPARTURE………..-3
TOTAL HEATING UNITS FOR THE MONTH………….58   DEPARTURE………..+9
TOTAL HEATING UNITS FOR THE SEASON……….5905   DEPARTURE………-446
TOTAL HEATING UNITS LAST SEASON TO DATE…..5721   DIFFERENCE……..+184

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE MONTH…………..12   DEPARTURE………-18
TOTAL COOLING UNITS FOR THE SEASON………….74   DEPARTURE………+20
TOTAL COOLING UNITS LAST SEASON TO DATE…….109   DEPARTURE………-35

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..35  SW  AT  9:54 A.M.
AERO…………………….36  SW  AT  9:34 A.M.
ASOS…………………….36  SW  AT  9:56 A.M.
DAVIS……………………38  M   AT  9:55 A.M.** RMY 36
FASTEST MILE FOR YESTERDAY………………….27  SW  AT  9:57 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….26  SW  AT 10:00 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………27  M   AT  9:57 A.M.**
AVERAGE WIND SPEED AND DIRECTION…………. .15.0 SW
ASOS……………………15.3
DAVIS…………………..14.6
**Davis direction malfunctioning

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.01  DEPARTURE……-1.12
ASOS…………..1.04
TOTAL PRECIPITATION FOR THE YEAR……….28.33  DEPARTURE……+3.72
ASOS………….29.91

PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

6/01 78/62/70/+8/T/…/..            21 S   AERO 21 S   RMY N/A
6/02 79/54/67/+5/T/…/..            26 ENE AERO 25 ENE RMY 27
6/03 59/45/52/-10/0.00/…/..        28 ENE AERO 25 ENE RMY N/A
6/04 52/45/49/-14/…/…/..         29 ENE AERO 26 ENE RMY 29
6/05 64/47/56/-7/…./…/..         24 N   AERO 21 N   RMY 23 TSTM
6/06 66/50/58/-5/0.00/…/..         23 S   AERO 21 S   RMY 22
6/07 69/50/60/-4/0.00/…/..         25 S   AERO 25 S   RMY 27
6/08 79/52/66/+2/0.00/…/..         20 SW  AERO 17 SW  RMY 18
6/09 79/58/69/+5/0.00/…/..         22 W   AERO 21 W   RMY 22
6/10 72/56/64/-1/0.00/…/..         20 S   AERO 18 S   RMY 17
6/11 68/51/60/-5/0.00/…/..         21 ENE AERO 20 SSW RMY N/A
6/12 77/49/63/-2/0.00/…/..         37 SW  AERO 37 SW  RMY 39
6/13 74/56/65/0/T/…/..             35 SW  AERO 36 SW  RMY 36

6/14 Low temp since midnight is 64F; normal low is now 57F

DAILY RECORDS FOR JUNE 2018

None so far.

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

RECORDS FOR JUNE 14
HIGH 93F IN 1956
LOW 41F IN 1912
PRECIP 1.49 INS 1896
PEAK GUST 55 MPH WNW IN 1958

RECORDS FOR JUNE 15
HIGH 94F IN 1988
LOW 42F IN 1959, 1978
PRECIP 2.04 INS IN 1903
PEAK GUST 52 MPH SW IN 1972

TODAY’S REPORT PREPARED BY: Jonathan O’Brien

 

Category: Daily Discussions

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