Tuesday, June 12, 2018

| June 13, 2018 | Reply

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 12, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

A HAZY AND WINDY DAY ON GREAT BLUE HILL….

We observed 70 miles of visibility this morning, being brought down
to 40 miles by a distant haze by 10 A.M. Humidity has decreased from
60% this morning to 40% by the 1 P.M. observation. It has been breezy
throughout the day, with frequent gusts over 20 mph. The peak gust so
far today is 37 mph, observed at 12:41 P.M. The maximum temperature
by 1 P.M. is 76F, 2 degrees above the normal of 74F. The low since
midnight was 49F, 7 degrees below the daily normal of 56F.
Today’s Observations:

7 A.M.
Weather: Few cirrostratus in all directions
Temperature: 58F; Dew Point: 44F; Wind: SW at 13G18 kts
Sea-level pressure: 30.20 ins. Hg, rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 58F
6-hr Min temp: 49F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 70 227/58/44/2313G18/020/ FEW CS ALQDS/ 8/005
53005 10058 20049

10 A.M.
Weather: Scattered cirrostratus
Temperature: 70F; Dew Point: 47F; Wind: SW at 13G20 kts
Sea-level pressure: 30.19 ins. Hg, falling, then more rapidly
Visibility: 40 miles, distant haze in all directions
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 40 223/70/47/2313G20/019/ DSNT HZ ALQDS/
8/005 58004

1 P.M.
Weather: Broken cirrus, few cumulus in all directions
Temperature: 76F; Dew Point: 49F; Wind: SW at 16G24 kts,
Peak Wind: 32 kts (37 mph) at 12:41 P.M.
Sea-level pressure: 30.12 ins. Hg, falling, then more rapidly
Visibility: 40 miles, distant haze in all directions
6-hr Max temp: 76F
6-hr Min temp: 58F
6-hr precip: 0.00 ins.
BHO SA 1755 E250 BKN 40 201/76/49/2316G24/012/ FEW CU ALQDS DSNT
HZ ALQDS PK WND 2332/41/ 8/102 58022 10076 20058

SUMMARY FOR MONDAY, JUNE 11, 2018

TEMPERATURE (DEGREES F)
MAX…..68   NORMAL…..74
MIN…..51   NORMAL…..56
MEAN….60   NORMAL…..65

DEPARTURE FROM 30-YEAR NORMAL…………………….-5
TOTAL DEPARTURE FOR THE MONTH……………………-26 [-2.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..5   DEPARTURE………..+2
TOTAL HEATING UNITS FOR THE MONTH………….56   DEPARTURE……….+13
TOTAL HEATING UNITS FOR THE SEASON……….5903   DEPARTURE………-443
TOTAL HEATING UNITS LAST SEASON TO DATE…..5721   DIFFERENCE……..+182

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE MONTH…………..12   DEPARTURE………-12
TOTAL COOLING UNITS FOR THE SEASON………….74   DEPARTURE………+26
TOTAL COOLING UNITS LAST SEASON TO DATE……..77   DEPARTURE……….-3

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21  ENE AT 2:32 P.M.
AERO…………………….20  SSW AT 9:41 P.M.
ASOS…………………….22  NE  AT 2:33 P.M.
DAVIS……………………22  M   AT 9:42 P.M.** RMY N/A
FASTEST MILE FOR YESTERDAY………………….16  SSW AT 8:44 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17  SSW AT 9:44 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………17  M   AT 8:58 P.M.**
AVERAGE WIND SPEED AND DIRECTION……………8.6 ESE
ASOS……………………8.4
DAVIS…………………..8.5
** 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……-0.80
ASOS…………..1.04
TOTAL PRECIPITATION FOR THE YEAR……….28.33  DEPARTURE……+4.04
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/+5/0.00/…/..         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 Low temp since midnight is 49F; normal low is now 56F

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 12
HIGH 94F IN 2017
LOW 40F IN 1906
PRECIP 1.79 INS 1955
PEAK GUST 58 MPH NW IN 1991

RECORDS FOR JUNE 13
HIGH 93F IN 1988
LOW 43F IN 1982
PRECIP 6.07 INS 1998 [Record for month]
PEAK GUST 69 MPH N IN 1956

TODAY’S REPORT PREPARED BY: Benjamin Turner

 

Category: Daily Discussions

Leave a Reply