Wednesday, June 27, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 27, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

FAIR WEATHER DAY WITH MOSTLY CLOUDY SKIES…

Yesterday was a close to seasonable day being only
on average 3 degrees below the average normal of 69F.
So far today temperatures continue to be seasonable
with a max of 77F. This is 1 degrees below the daily
normal of 78F. The low since midnight of 59F is also
1 degree below the daily normal of 60F.
Wind, from the south today, has been moderate with a
few gust over 20 kts (23 MPH). The southerly wind kept
a distant haze in the area increasing as dew points
lowered from 40 to 60 miles by 10:00 A.M.

Today’s Observations:

7 A.M.
Weather: Overcast altostratus, few cumulus distant E-SSW,
sun dimly visible
Temperature: 63F; Dew Point: 59F; Wind: SW at 9G19 kts
Sea-level pressure: 30.14 ins. Hg, steady then rising
Visibility: 40 miles, distant haze in all directions
6-hr Max temp: 63F
6-hr Min temp: 59F
24-hr Precip: 0.00 ins.
BHO SA 1155 E200 OVC 40 207/63/59/2209G19/014/ FEW CU DSNT
E-SSW DSNT HZ ALQDS SUN DMLY VSBL/ 8/12/ 53003 10063 20059

10 A.M.
Weather: Scattered cumulus, overcast cirrostratus,
full solar halo
Temperature: 72F; Dew Point: 54F; Wind: WSW at 11G20 kts
Sea-level pressure: 30.13 ins. Hg, falling unsteadily
Visibility: 60 miles, distant haze in all directions
3-hr Precip: 0.00 ins.
BHO SA 1455 50 SCT E220 OVC 60 204/72/54/2411G20/013/
FULL SOLAR HALO DSNT HZ ALQDS/ 8/107 58003

1 P.M.
Weather: Scattered cumulus, broken altocumulus, broken
cirrostratus
Temperature: 77F; Dew Point: 56F; Wind: SW at 12G18 kts
Sea-level pressure: 30.08 ins. Hg, falling, then more rapidly
Visibility: 60 miles, distant haze in all directions
6-hr Max temp: 77F
6-hr Min temp: 63F
6-hr precip: 0.00 ins.
BHO SA 1755 48 SCT E200 BKN 250 BKN 60 186/77/56/2212G18/008/
DSNT HZ ALQDS/ 8/168 58018 10077 20063

SUMMARY FOR TUESDAY, JUNE 26, 2018

TEMPERATURE (DEGREES F)
MAX…..79   NORMAL…..78
MIN…..53   NORMAL…..60
MEAN….66   NORMAL…..69

DEPARTURE FROM 30-YEAR NORMAL…………………….-3
TOTAL DEPARTURE FOR THE MONTH……………………-20 [-1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..0   DEPARTURE………..-1
TOTAL HEATING UNITS FOR THE MONTH………….69   DEPARTURE………..-1
TOTAL HEATING UNITS FOR THE SEASON……….5916   DEPARTURE………-457
TOTAL HEATING UNITS LAST SEASON TO DATE…..5724   DIFFERENCE……..+192

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………1   DEPARTURE……….-4
TOTAL COOLING UNITS FOR THE MONTH…………..64   DEPARTURE………-18
TOTAL COOLING UNITS FOR THE SEASON…………126   DEPARTURE………+20
TOTAL COOLING UNITS LAST SEASON TO DATE…….188   DEPARTURE………-62

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..24 SSW AT 5:07 P.M.*
AERO…………………….24 N   AT 4:27 P.M.
ASOS…………………….25 NNW AT 4:25 P.M.
DAVIS……………………26 M   AT 4:28 P.M.** RMY 31
FASTEST MILE FOR YESTERDAY………………….18 SSW AT 4:46 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….18 SW  AT 9:31 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………19 M   AT 4:44 P.M.**
AVERAGE WIND SPEED AND DIRECTION……………9.8 SSW
ASOS…………………..10.3
DAVIS…………………..9.4
* Last of multiple occurrences, additional peak gust at 4:27 P.M.
**Davis direction malfunctioning

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……….1.56  DEPARTURE……-2.30
ASOS…………..1.57
TOTAL PRECIPITATION FOR THE YEAR……….28.88  DEPARTURE……+2.54
ASOS………….30.44

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/009/01            21 S   AERO 21 S   RMY N/A
6/02 79/54/67/+5/T/353/39            26 ENE AERO 25 ENE RMY 27
6/03 59/45/52/-10/0.00/816/90        28 ENE AERO 25 ENE RMY N/A
6/04 52/45/49/-14/0.82/000/00        29 ENE AERO 26 ENE RMY 29
6/05 64/47/56/-7/0.19/173/19         24 N   AERO 21 N   RMY 23  TSTM
6/06 66/50/58/-5/0.00/373/41         23 S   AERO 21 S   RMY 22
6/07 69/50/60/-4/0.00/282/31         25 S   AERO 25 S   RMY 27
6/08 79/52/66/+2/0.00/684/75         20 SW  AERO 17 SW  RMY 18
6/09 79/58/69/+5/0.00/767/84         22 W   AERO 21 W   RMY 22
6/10 72/56/64/-1/0.00/593/65         20 S   AERO 18 S   RMY 17
6/11 68/51/60/-5/0.00/594/65         21 ENE AERO 20 SSW RMY N/A
6/12 77/49/63/-2/0.00/814/89         37 SW  AERO 37 SW  RMY 39
6/13 74/56/65/0/T/284/31             35 SW  AERO 36 SW  RMY 36
6/14 77/61/69/+3/0.00/495/54         35 W   AERO 36 WNW RMY 37
6/15 68/53/61/-5/0.01/266/29         17 NNW AERO 16 WNW RMY 19
6/16 83/54/69/+3/0.00/761/83         25 NNW AERO 24 NNW RMY 25
6/17 86/63/75/+8/0.00/807/88         23 S   AERO 22 S   RMY N/A
6/18 86/64/75/+8/0.10/284/31         37 SSW AERO 37 SSW RMY 40  TSTM
6/19 81/64/73/+6/0.01/789/86         31 WSW AERO 32 WSW RMY 32
6/20 81/58/70/+2/0.00/459/50         22 W   AERO 21 W   RMY 23
6/21 81/62/72/+4/0.00/706/77         22 E   AERO 18 E   RMY 21
6/22 75/56/66/-2/0.00/…/..         24 ESE AERO 22 ESE RMY 24
6/23 65/55/60/-8/0.03/…/..         22 ENE AERO 21 NE  RMY 22
6/24 78/56/67/-2/…./…/..         21 SSW AERO 20 SSW RMY N/A
6/25 70/56/63/-6/…./…/..         30 N   AERO 29 N   RMY 31  TSTM
6/26 79/53/66/-3/0.00/…/..         24 SSW AERO 24 SSW RMY 25

6/27 Low temp since midnight is 59F; normal low is now 60F

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 27
HIGH 93F IN 1999, 2007
LOW 46F IN 1897
PRECIP 1.72 INS IN 1938
PEAK GUST 55e N IN 1945

RECORDS FOR JUNE 28
HIGH 95F IN 1991
LOW 47F IN 1970
PRECIP 2.09 INS IN 1938
PEAK GUST 52 MPH WSW IN 1993

TODAY’S REPORT PREPARED BY: Kaitlin A. Geagan