Monday, June 24, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JUNE 24, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

ANOTHER SUNNY, DRY DAY WITH DECENT VISIBILITY….

With temperatures reaching 83 and humidity remaining low,
today has been a warm, comfortable summer afternoon.
Skies went from being nearly clear to partly cloudy between
the 7 AM and 1 PM observations today, but only about 3/8ths
of the sky are obscured by some scattered cirrus and cumulus
clouds currently at the 1 PM observation. The average high
for today is 78F, and our average low is 60, bringing our
average temperature today slightly above normal. Visibility
has remained good, with 70-75 mile visibility at each
observation today.

Today’s Observations:

7 A.M.
Weather: Clear, few cirrus in all directions
Temperature: 68F; Dew Point: 57F; Wind: WNW at 10G13 kts
Sea-level pressure: 29.84 ins. Hg, rising, then more slowly
Visibility: 75 miles
6-hr Max temp: 68F
6-hr Min temp: 61F
24-hr Precip: 0.00 ins.
BHO SA 1155 CLR 75 104/68/57/3010G13/984/ FEW CI ALQDS/
8/001 51009 10068 20061

10 A.M.
Weather: Scattered cirrus
Temperature: 77F; Dew Point: 55F; Wind: NW at 5 kts
Wind: Light
Sea-level pressure: 29.85 ins. Hg, rising then falling
Visibility: 75 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 75 110/77/55/3205/985/ WND LGT/
8/001 50006

1 P.M.
Weather: Scattered cumulus, scattered cirrostratus
Temperature: 83F; Dew Point: 53F; Wind: WNW at 7 kts
Sea-level pressure: 29.84 ins. Hg, falling, then more quickly
Visibility: 75 miles
6-hr Max temp: 83F
6-hr Min temp: 68F
6-hr Precip: 0.00 ins.
BHO SA 1755 40 SCT 250 SCT 70 104/83/53/3007/984/ 8/101
58006 10083 20068

SUMMARY FOR SUNDAY, JUNE 23, 2019

TEMPERATURE (DEGREES F)
MAX…..82   NORMAL…..77
MIN…..59   NORMAL…..59
MEAN….71   NORMAL…..68

DEPARTURE FROM 30-YEAR NORMAL………………….+3
TOTAL DEPARTURE FOR THE MONTH………………….+1 [-0.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………0   DEPARTURE………-1
TOTAL HEATING UNITS FOR THE MONTH…………..33   DEPARTURE……..-34
TOTAL HEATING UNITS FOR THE SEASON………..6252   DEPARTURE…….-118
TOTAL HEATING UNITS LAST SEASON TO DATE……5914   DIFFERENCE……+338

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………6   DEPARTURE………+2
TOTAL COOLING UNITS FOR THE MONTH…………..40   DEPARTURE……..-28
TOTAL COOLING UNITS FOR THE SEASON………….48   DEPARTURE……..-44
TOTAL COOLING UNITS LAST SEASON TO DATE…….123   DEPARTURE……..-75

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..30 NW  AT 10:42 A.M.
AERO…………………….23 WNW AT 12:04 P.M.
ASOS…………………….28 NW  AT 12:35 A.M.
DAVIS……………………30 W   AT 10:41 A.M. RMY 29
FASTEST MILE FOR YESTERDAY………………….23 NW  AT 10:40 A.M
MAXIMUM 2-MINUTE ASOS AVERAGE……………….24 NW  AT 10:35 A.M
MAXIMUM 2-MINUTE DAVIS AVERAGE………………22 W   AT 10:41 A.M
AVERAGE WIND SPEED AND DIRECTION………….13.7 WNW
ASOS………………….11.6
DAVIS…………………14.2 W [266 deg.] 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……….3.48  DEPARTURE……-0.02
ASOS…………..3.46
TOTAL PRECIPITATION FOR THE YEAR……….29.27  DEPARTURE……+3.11
ASOS………….29.19

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

06/01 71/54/63/+1/0.00/551/61               21 E   AERO 20 E   RMY 18
06/02 75/51/63/+1/…./417/46               23 S   AERO 21 S   RMY N/A
06/03 69/50/60/-2/…./753/83               41 W   AERO 39 W   RMY 43
06/04 70/45/58/-5/0.00/717/79               29 W   AERO 23 W   RMY N/A
06/05 81/57/69/+6/…./527/58               33 SSW AERO 33 SSW RMY N/A
06/06 75/64/70/+6/…./428/47               28 SSW AERO 28 SSW RMY N/A
06/07 80/59/70/+6/0.00/692/76               23 S   AERO 23 S   RMY 22
06/08 78/57/68/+4/0.00/885/97               23 ENE AERO 21 SW  RMY 21
06/09 78/55/67/+3/0.00/840/92               22 S   AERO 21 S   RMY 21
06/10 79/54/67/+2/…./712/78               26 SSE AERO 25 SSE RMY 33
06/11 73/58/66/+1/…./247/27               32 NW  AERO 30 NW  RMY 35
06/12 75/52/64/-1/…./869/95               25 SSW AERO 25 S   RMY 28
06/13 55/49/52/-13/…./…/..              36 NE  AERO 35 NE  RMY 35
06/14 72/50/61/-5/0.00/…/..               38 W   AERO 39 W   RMY 38
06/15 79/54/67/+1/0.00/…/..               38 SSW AERO 41 SSW RMY 40
06/16 70/62/66/0/…./…/..                32 SW  AERO 35 SW  RMY N/A
06/17 74/62/68/+1/…./…/..               12 SSE AERO 18 NW  RMY 17
06/18 71/62/67/0/…./…/..                17*S   AERO 17 S   RMY 16
06/19 74/61/68/+1/…./…/..               16 SSE AERO 20 SSE RMY 19
06/20 69/61/65/-3/…./…/..               26 S   AERO 26 S   RMY 29
06/21 68/58/63/-5/…./…/..               32 NW  AERO 28 NW  RMY 33
06/22 77/56/67/-1/…./…/..               33 NW  AERO 32 NW  RMY 35
06/23 82/59/71/+3/…./…/..               30 NW  AERO 25 WNW RMY 29

06/24 Low temp since midnight is 61F; normal low is 60F

*Estimated

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

RECORDS FOR JUNE 24
HIGH 91F IN 1914,1976,2013
LOW 40F IN 1932
PRECIP 2.80 INS IN 1929
PEAK GUST 54 MPH WNW IN 2010

RECORDS FOR JUNE 25
HIGH 93F IN 1943,1980, 2005
LOW 47F IN 1903
PRECIP 1.38 INS IN 2012
PEAK GUST 51 MPH W IN 1960

TODAY’S REPORT PREPARED BY: Samantha Richard