Sunday, June 23, 2019

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JUNE 23, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

A WARM AND PARTLY CLOUDY SUMMER DAY ATOP
GREAT BLUE HILL….

A quick shower left only a trace yesterday afternoon
shortly following the 1 P.M. observation. Today we
experienced fair weather and a visibility of 75 miles.
Wind was northwesterly, at a speed around 15 mph. The
highest gust seen today is 28 mph a couple minutes after
10 A.M. Temperature and rainfall amounts so far this month
are very close to seasonal averages. The high so far today
is 80F, 3 degrees above the daily maximum temperature. Our low
since midnight was 59F, which is 3 the same as our normal
minimum temperature.

Today’s Observations:

7 A.M.
Weather: Scattered cirrostratus, few altocumulus N-SE
Temperature: 67F; Dew Point: 52F; Wind: NW at 11G20 kts
Sea-level pressure: 29.94 ins. Hg, rising then more slowly
Visibility: 75 miles
6-hr Max temp: 67F
6-hr Min temp: 59F
24-hr Precip: Trace
BHO SA 1155 250 SCT 75 139/67/52/3111G20/994/ FEW AC
N-SE/ 8/055 51021 10067 20059

10 A.M.
Weather: Scattered cirrus
Temperature: 77F; Dew Point: 51F; Wind: NW at 7G16 kts
Sea-level pressure: 29.90 ins. Hg, falling steadily
Visibility: 75 miles
3-hr Precip: 0.00 ins.
BHO SA 1455 250 SCT 75 126/77/51/3107G16/990/ 8/002
58013

1 P.M.
Weather: Scattered cirrostratus
Temperature: 80F; Dew Point: 52F; Wind: WNW at 11G16 kts
Sea-level pressure: 29.84 ins. Hg, falling steadily
Visibility: 75 miles
6-hr Max temp: 80F
6-hr Min temp: 67F
6-hr Precip: 0.00 ins.
BHO SA 1755 250 SCT 75 106/80/52/3011G16/984/ 8/005
58020 10080 20067

SUMMARY FOR SATURDAY, JUNE 22, 2019

TEMPERATURE (DEGREES F)
MAX…..77   NORMAL…..77
MIN…..56   NORMAL…..59
MEAN….67   NORMAL…..68

DEPARTURE FROM 30-YEAR NORMAL………………….-1
TOTAL DEPARTURE FOR THE MONTH………………….-2 [-0.3 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……..-33
TOTAL HEATING UNITS FOR THE SEASON………..6252   DEPARTURE…….-117
TOTAL HEATING UNITS LAST SEASON TO DATE……5909   DIFFERENCE……+343

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………2   DEPARTURE………-2
TOTAL COOLING UNITS FOR THE MONTH…………..34   DEPARTURE……..-30
TOTAL COOLING UNITS FOR THE SEASON………….42   DEPARTURE……..-46
TOTAL COOLING UNITS LAST SEASON TO DATE…….123   DEPARTURE……..-81

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..33 NW  AT 2:41 P.M.
AERO…………………….32 NW  AT 2:44 P.M.
ASOS…………………….35 NW  AT 2:41 P.M.
DAVIS……………………35 WNW AT 1:56 P.M. RMY 35
FASTEST MILE FOR YESTERDAY………………….26 NW  AT 2:46 P.M
MAXIMUM 2-MINUTE ASOS AVERAGE……………….24 NW  AT 2:47 P.M
MAXIMUM 2-MINUTE DAVIS AVERAGE………………25 W   AT 2:46 P.M
AVERAGE WIND SPEED AND DIRECTION………….12.0 WNW
ASOS………………….11.6
DAVIS…………………12.4 W [274 deg.] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…Trace  DEPARTURE……-0.12
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.48  DEPARTURE……+0.09
ASOS…………..3.46
TOTAL PRECIPITATION FOR THE YEAR……….29.27  DEPARTURE……+3.22
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/…/..               21 E   AERO 20 E   RMY 18
06/02 75/51/63/+1/…./…/..               23 S   AERO 21 S   RMY N/A
06/03 69/50/60/-2/…./…/..               41 W   AERO 39 W   RMY 43
06/04 70/45/58/-5/0.00/…/..               29 W   AERO 23 W   RMY N/A
06/05 81/57/69/+6/…./…/..               33 SSW AERO 33 SSW RMY N/A
06/06 75/64/70/+6/…./…/..               28 SSW AERO 28 SSW RMY N/A
06/07 80/59/70/+6/0.00/…/..               23 S   AERO 23 S   RMY 22
06/08 78/57/68/+4/0.00/…/..               23 ENE AERO 21 SW  RMY 21
06/09 78/55/67/+3/0.00/…/..               22 S   AERO 21 S   RMY 21
06/10 79/54/67/+2/…./…/..               26 SSE AERO 25 SSE RMY 33
06/11 73/58/66/+1/…./…/..               32 NW  AERO 30 NW  RMY 35
06/12 75/52/64/-1/…./…/..               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 Low temp since midnight is 59F; normal low is 59F

*Estimated

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

RECORDS FOR JUNE 23
HIGH 93F IN 1888
LOW 45F IN 1885
PRECIP 0.70 INS IN 2006
PEAK GUST 63 MPH SE IN 1972 (AGNES)

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

TODAY’S REPORT PREPARED BY: Benjamin Turner