Monday, June 25, 2018

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JUNE 25, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME

BREEZY DAY WITH COOLER TEMPERATURES AND A PASSING
SHOWER…

The wind picked up since yesterday’s light wind and
we have a peak gust so far today of 26 kts (30 MPH).
The breezes were cool with wind coming from the NW
then switching to the NE around 11:00 A.M. So far
today the high temperature is below normal with a
high so far of 70F. This is 8 degrees below the
daily normal of 78F.
A couple of showers and thunderstorms began late
last night and ended early this morning. So far
today we measured 0.39 ins. since 7:00 A.M.
yesterday. A quick moving rain shower began around
11:15 A.M. EST and ended around 11:20 A.M. EST left
an additional 0.01 ins. of rainfall since 7:00 A.M.
High pressure in the area allowed cloud cover to
decreased after the short rain shower. This made for
a sunny but breezy afternoon afternoon. Visibility
varied today but increased as the air became drier
this afternoon for an excellent 80 miles at 1:00 P.M.

Today’s Observations:

7 A.M.
Weather: Scattered stratus fractus drifting over the summit,
broken stratocumulus
Temperature: 64F; Dew Point: 62F; Wind: NNW at 7 kts
Sea-level pressure: 29.86 ins. Hg, rising, then more slowly
Visibility: 35 miles, distant fog in all directions
6-hr Max temp: 67F
6-hr Min temp: 62F
24-hr Precip: 0.39 ins.
BHO SA 1155 13 SCT E38 BKN 35 112/64/62/3307/986/ STFA
DRFTG OVR SMT DSNT FG ALQDS/ 8/400 51020 MANUAL 70039
ASOS 70038 10067 20062

10 A.M.
Weather: Broken cumulus, broken stratocumulus
Temperature: 68F; Dew Point: 61F; Wind: NW at 14G21 kts
Sea-level pressure: 29.92 ins. Hg, rising steadily
Visibility: 80 miles, except NNW-SSE 40 miles, distant
haze NNW-SSE
3-hr Precip: 0.00 ins.
BHO SA 1455 E40 BKN E62 BKN 80 131/67/57/3214G21/992/
VSBY 40 NNW-SSE DSNT HZ NNW-SSE/ 53019

1 P.M.
Weather: Scattered stratocumulus, few cumulus in all
directions
Temperature: 66F; Dew Point: 56F; Wind: ENE at 10G15 kts
Sea-level pressure: 29.99 ins. Hg, rising, then more slowly
Visibility: 80 miles
6-hr Max temp: 70F
6-hr Min temp: 64F
6-hr precip: 0.01 ins.
BHO SA 1755 33 SCT 80 156/66/56/0710G15/999/ FEW CU ALQDS/
8/800 51025 MANUAL 6001/ ASOS 60001 10070 20064

SUMMARY FOR SUNDAY, JUNE 24, 2018

TEMPERATURE (DEGREES F)
MAX…..78   NORMAL…..78
MIN…..56   NORMAL…..60
MEAN….67   NORMAL…..69

DEPARTURE FROM 30-YEAR NORMAL…………………….-2
TOTAL DEPARTURE FOR THE MONTH……………………-11 [-0.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..0   DEPARTURE………..-1
TOTAL HEATING UNITS FOR THE MONTH………….67   DEPARTURE………..-2
TOTAL HEATING UNITS FOR THE SEASON……….5914   DEPARTURE………-457
TOTAL HEATING UNITS LAST SEASON TO DATE…..5724   DIFFERENCE……..+190

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………2   DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE MONTH…………..63   DEPARTURE………-10
TOTAL COOLING UNITS FOR THE SEASON…………125   DEPARTURE………+28
TOTAL COOLING UNITS LAST SEASON TO DATE…….178   DEPARTURE………-53

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..21 SSW AT 5:07 P.M.
AERO…………………….20 SSW AT 5:07 P.M.
ASOS…………………….21 SSW AT 5:07 P.M.
DAVIS……………………20 M   AT 5:06 P.M.** RMY N/A
FASTEST MILE FOR YESTERDAY………………….14 SSW AT 5:07 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….15 SSW AT 5:08 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………15 M   AT 5:08 P.M.**
AVERAGE WIND SPEED AND DIRECTION……………6.4 SSW
ASOS……………………6.8
DAVIS…………………..6.5
**Davis direction malfunctioning

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.39  DEPARTURE……+0.27
ASOS…………..0.38
TOTAL PRECIPITATION FOR THE MONTH……….1.55  DEPARTURE……-2.07
ASOS…………..1.56
TOTAL PRECIPITATION FOR THE YEAR……….28.87  DEPARTURE……+2.77
ASOS………….30.43

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/…/..         25 NNW AERO 24 NNW RMY 25
6/17 86/63/75/+8/0.00/…/..         23 S   AERO 22 S   RMY N/A
6/18 86/64/75/+8/0.10/…/..         37 SSW AERO 37 SSW RMY 40  TSTM
6/19 81/64/73/+6/0.01/…/..         31 WSW AERO 32 WSW RMY 32
6/20 81/58/70/+2/0.00/…/..         22 W   AERO 21 W   RMY 23
6/21 81/62/72/+4/0.00/…/..         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/…./…/..         22 ENE AERO 21 NE  RMY 22
6/24 78/56/67/-2/…./…/..         21 SSW AERO 20 SSW RMY N/A

6/25 Low temp since midnight is 62F; 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 25
HIGH 93F IN 1943,1980, 2005
LOW 47F IN 1903
PRECIP 1.38 INS IN 2012
PEAK GUST 51 MPH W IN 1960

RECORDS FOR JUNE 26
HIGH 96F IN 1952
LOW 45F IN 1986
PRECIP 1.52 INS IN 1945
PEAK GUST 48 MPH N IN 1998

TODAY’S REPORT PREPARED BY: Kaitlin Geagan