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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 19, 2018  
ALL TIMES ARE IN EASTERN STANDARD TIME

MODERATE TO STRONG WIND GUST FROM THE NORTHWEST BRINGS  
WARM AND PARTLY CLOUDY CONDITIONS TO GREAT BLUE HILL...

Today's temperatures still remained higher than the normal with a 
maximum of 81F so far today.This is 5 degrees above the daily 
normal of 76F. With yesterdays passing thunderstorm, there was 
0.11 inches of precipitation measured at the 7:00 A.M. observation. 
The wind mainly came from the northwest today, allowing slightly 
better visibility of 50 miles by 1:00 P.M. .Wind continued to 
be moderate to strong today, with frequent gusts over 20 MPH.
So far, we have had a peak gust of 26 kts (30 MPH) by 1:00 
P.M. Our low min since midnight was 68F, which is 1F degree 
below the record high min of 69F set back in 1995. 
 
Today's Observations:

7 A.M.
Weather: Broken cirrostratus, few cumulus in all directions 
Temperature: 71F; Dew Point: 62F; Wind: NW at 12G22 kts
Sea-level pressure: 29.72 ins. Hg, rising, then more slowly 
Visibility: 45 miles, distant haze in all directions 
6-hr Max temp: 71F
6-hr Min temp: 69F
24-hr Precip: 0.11 ins.
BHO SA 1155 90 SCT E250 BKN 45 067/71/62/3212G22/972/ FEW CU 
ALQDS DSNT HZ ALQDS / 8/184 52024 MANUAL 70011 ASOS 70011 
10071 20069

10 A.M.
Weather: Broken cirrostratus, few cumulus in all directions 
Temperature: 77F; Dew Point: 60F; Wind: WNW at 12G20 kts
Sea-level pressure: 29.77 ins. Hg, rising, then more slowly 
Visibility: 45 miles, distant haze in all directions 
3-hr Precip: 0.00 ins
BHO SA 1455 E300 BKN 45 008/77/60/3012G20/977 FEW CU ALQDS
DSNT HZ ALQDS/ 8/104 50011

1 P.M.
Weather: Scattered cirrostratus, few cumulus in all directions
Temperature: 79F; Dew Point: 52F; Wind: NW at 13G19 kts,
Sea-level pressure: 29.78 ins. Hg, rising, then falling
Visibility: 50 miles, distant haze in all directions
6-hr Max temp: 81F
6-hr Min temp: 71F
6-hr precip: 0.00 ins.
BHO SA 1755 SCT 250 50 083/79/52/3213G19/978/ FEW CU 
ALQDS DSNT HZ ALQDS/ 8/104 53003 10081 20071 

SUMMARY FOR MONDAY, JUNE 18, 2018

TEMPERATURE (DEGREES F)
MAX.....86   NORMAL.....76
MIN.....64   NORMAL.....58
MEAN....75   NORMAL.....67

DEPARTURE FROM 30-YEAR NORMAL.........................+8
TOTAL DEPARTURE FOR THE MONTH........................-11 [-0.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............0   DEPARTURE...........-2
TOTAL HEATING UNITS FOR THE MONTH.............62   DEPARTURE...........+4
TOTAL HEATING UNITS FOR THE SEASON..........5909   DEPARTURE.........-454
TOTAL HEATING UNITS LAST SEASON TO DATE.....5724   DIFFERENCE........+185

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............10   DEPARTURE..........+6
TOTAL COOLING UNITS FOR THE MONTH..............40   DEPARTURE..........-7
TOTAL COOLING UNITS FOR THE SEASON............102   DEPARTURE.........+31
TOTAL COOLING UNITS LAST SEASON TO DATE.......120   DEPARTURE.........-18

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................37 SSW AT 4:44 P.M.
                   AERO.........................37 SSW AT 4:39 P.M. 
                   ASOS.........................38 SW  AT 6:00 P.M.
                   DAVIS........................41 M   AT 3:37 P.M.** RMY 40
FASTEST MILE FOR YESTERDAY......................28 SSW AT 3:38 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE...................29 SW  AT 3:43 P.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE..................30 M   AT 5:32 P.M.**
AVERAGE WIND SPEED AND DIRECTION..............16.6 SSW
                   ASOS.......................17.0
                   DAVIS......................16.1
* Additional fastest mile at 3:30 P.M.
**Davis direction malfunctioning 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.11  DEPARTURE......-0.03
                         ASOS..............0.11
TOTAL PRECIPITATION FOR THE MONTH..........1.13  DEPARTURE......-1.73
                         ASOS..............1.15  
TOTAL PRECIPITATION FOR THE YEAR..........28.45  DEPARTURE......+3.11
                         ASOS.............30.02

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/.../..         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 77/49/63/-2/0.00/.../..         37 SW  AERO 37 SW  RMY 39
6/13 74/56/65/0/T/.../..             35 SW  AERO 36 SW  RMY 36
6/14 77/61/69/+3/0.00/.../..         35 W   AERO 36 WNW RMY 37
6/15 68/53/61/-5/0.01/.../..         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/.../..../..         37 SSW AERO 37 SSW RMY 40 TSTM

6/19 Low temp since midnight is 68F; normal low is now 58F

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 19
HIGH 92F IN 1923
LOW 40F IN 1920
PRECIP 3.92 INS 1922
PEAK GUST 66e MPH NW IN 1940

RECORDS FOR JUNE 20
HIGH 94F IN 1953
LOW 41F IN 1918
PRECIP 2.62 INS 1945
PEAK GUST 63 MPH NE IN 1967, SSW IN 2010 

TODAY'S REPORT PREPARED BY: Kaitlin Geagan/ Devin Richardt