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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, JUNE 19, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST WITH BREAKS AROUND NOONTIME FOLLOWING
SOME OVERNIGHT RAINFALL....

We observed foggy conditions with a very light drizzle this 
morning, only leaving a trace in the gauge by 1 P.M. Rain
overnight amounted to 0.10 inches by 7 A.M. Skies have 
been overcast, with some breaks allowing some afternoon
sunshine. Fog has decreased since this morning, allowing 
a visibility of 40 miles this afternoon. The high so far 
today is 73F, 3 degrees below the daily maximum temperature 
of 76F. Our low since midnight was 61F, which is 3 degrees 
above our normal minimum temperature for today of 58F. 


PRELIMINARY STATS FOR MAY 2019

TEMPERATURE, Deg. F
Avg. Max. 63.5 [-2.8]
Avg. Min. 46.0 [-1.8]
Mean      54.8 [-2.2]
24-hour corrected mean: 54.4
Max. for month: 85F on the 26th
Min. for month: 36F on the 12th

HEATING DEGREE DAYS
Total heating units:    318 [+50]
Total for the season:  6219 [-84]
Total for last season: 5847

COOLING DEGREE DAYS
Total cooling units:   8 [-14]
Total for the season:  8 [-16]
Total for last season: 62  

PRECIPITATION, Inches
Total: 4.61 [+0.50]
Greatest in 24 hrs: 1.24 ins. on the 13th-14th

SNOWFALL, Inches
Total: Trace [+/-0.0]
Greatest in 24 hrs: Trace [12th] 

WIND, mph
Avg. uncorrected wind speed: 10.5
Avg. corrected wind speed: 11.1
Prevailing wind direction: S at 13%
Peak gust and direction: 47 NW on 24th  

SUNSHINE:
Campbell-Stokes card minutes: 10362 minutes of possible 26226 or 40%
Astronomical total minutes:   10733 minutes of possible 27166 or 40%


Today's Observations:

7 A.M.
Weather: Light drizzle
Temperature: 63F; Dew Point: 63F; Wind: E at 3 kts,
Wind: Light and variable
Sea-level pressure: 29.90 ins. Hg, rising, then more slowly
Visibility: 1 mile, fog
6-hr Max temp: 63F
6-hr Min temp: 63F
24-hr Precip: 0.10 ins.
BHO SA 1155 X W3 1L-F 125/63/63/0903/990/ WND L/V L-CTD/ 
8//// 70010 51006 10064 20061

10 A.M.
Weather: Overcast stratocumulus
Temperature: 65F; Dew Point: 63F; Wind: SE at 3 kts,
Wind: Light and variable
Sea-level pressure: 29.90 ins. Hg, falling, then more slowly 
Visibility: 25 miles, distant fog
3-hr Precip: Trace
BHO SA 1455 E16 OVC 25 124/65/63/1303/990/ DSNT FG ALQDS 
WND L/V/ 8/4// 600// 56001

1 P.M.
Weather: Overcast stratocumulus, break in overcast overhead
Temperature: 71F; Dew Point: 62F; Wind: SE at 7 kts
Sea-level pressure: 29.88 ins. Hg, falling, then more slowly
Visibility: 40 miles, distant fog
6-hr Max temp: 73F
6-hr Min temp: 63F
6-hr Precip: Trace 
BHO SA 1755 E30 OVC 40 117/71/62/1507/988/ DSNT FG ALQDS 
BINOVC OVHD/ 8/4// 600// 58007 10073 20063 


SUMMARY FOR TUESDAY, JUNE 18, 2019 

TEMPERATURE (DEGREES F)
MAX.....71   NORMAL.....76
MIN.....62   NORMAL.....58
MEAN....67   NORMAL.....67

DEPARTURE FROM 30-YEAR NORMAL.......................0
TOTAL DEPARTURE FOR THE MONTH......................+6 [+0.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE.........-2
TOTAL HEATING UNITS FOR THE MONTH..............31   DEPARTURE........-29
TOTAL HEATING UNITS FOR THE SEASON...........6250   DEPARTURE.......-113
TOTAL HEATING UNITS LAST SEASON TO DATE......5909   DIFFERENCE......+341

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............2   DEPARTURE.........-2
TOTAL COOLING UNITS FOR THE MONTH..............29   DEPARTURE........-18
TOTAL COOLING UNITS FOR THE SEASON.............37   DEPARTURE........-34
TOTAL COOLING UNITS LAST SEASON TO DATE.......102   DEPARTURE........-65

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................17*S   AT  1:03 P.M.
                   AERO.........................17 S   AT  1:05 P.M.
                   ASOS.........................16 S   AT  1:05 P.M.
                   DAVIS........................18 S   AT  1:04 P.M.  RMY 16
FASTEST MILE FOR YESTERDAY.......................9 S   AT  1:02 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................12 S   AT  1:05 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................13 S   AT  1:04 P.M.
AVERAGE WIND SPEED AND DIRECTION..............3.9 S
                   ASOS.......................3.9
                   DAVIS......................4.6 SSE [167 deg.]
 

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.10  DEPARTURE.......-0.04
                         ASOS..............0.10
TOTAL PRECIPITATION FOR THE MONTH..........2.47  DEPARTURE.......-0.39
                         ASOS..............2.47
TOTAL PRECIPITATION FOR THE YEAR..........28.26  DEPARTURE.......+2.74
                         ASOS.............28.20


PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

05/01 57/40/49/-4/0.00/0.0/025/03           21 S   AERO 21 SSE  RMY 21
05/02 45/41/43/-10/0.02/0.0/000/00          21 NE  AERO 21 SSW  RMY 20
05/03 60/43/52/-1/0.07/0.0/000/00           23 S   AERO 23 S    RMY 22
05/04 54/46/50/-4/0.05/0.0/000/00           14 ENE AERO 14 ENE  RMY 17
05/05 52/44/48/-6/0.04/0.0/000/00           18 NE  AERO 20 NE   RMY N/A
05/06 58/44/51/-3/0.02/0.0/505/59           25 NE  AERO 26 ENE  RMY 24
05/07 72/41/57/+2/0.12/0.0/566/66           30 S   AERO 29 S    RMY 30
05/08 67/48/58/+3/0.00/0.0/758/88           20 NE  AERO 20 NE   RMY 19
05/09 60/43/52/-3/0.00/0.0/492/57           21 SE  AERO 21 E    RMY 22
05/10 61/46/54/-1/0.16/0.0/043/05           35 S   AERO 37 S    RMY 37
05/11 68/50/59/+3/0.00/0.0/763/88           26 NW  AERO M  M    RMY N/A
05/12 50/36/43/-13/0.71/T/000/00            30 ENE AERO M  M    RMY N/A
05/13 52/38/45/-11/0.91/0.0/113/13          35 E   AERO M  M    RMY 34
05/14 44/38/41/-16/0.34/0.0/000/00          26 NNE AERO M  M    RMY 25
05/15 58/40/49/-8/0.00/0.0/587/67           28 NW  AERO M  M    RMY 28
05/16 68/46/57/0/0.00/0.0/615/70            17 NW  AERO M  M    RMY 19
05/17 64/49/57/0/0.07/0.0/062/07            22 WNW AERO 21 WNW  RMY 25
05/18 72/49/61/+3/0.00/0.0/811/92           26 SSE AERO 25 SSE  RMY 29
05/19 69/50/60/+2/0.13/0.0/345/39           39 S   AERO 43 SSE  RMY 42
05/20 85/52/69/11/0.36/0.0/408/46           35 SW  AERO 40 SW   RMY 39
05/21 69/52/61/+2/0.00/0.0/843/95           40 NW  AERO 46 NW   RMY 45
05/22 68/49/59/0/0.00/0.0/862/97            32 NNW AERO 29 NW   RMY N/A
05/23 68/48/58/-1/0.25/0.0/080/09           36 SSW AERO 37 SSW  RMY 40
05/24 68/47/58/-1/0.02/0.0/000/00           47 NW  AERO 47 NW   RMY 51
05/25 75/47/61/+1/0.14/0.0/617/69           M  M   AERO 35 SSW  RMY 39
05/26 85/49/67/+7/0.23/0.0/645/72           40 W   AERO 38 W    RMY 39
05/27 76/57/67/+7/0.00/0.0/798/89           30 NE  AERO 22 NE   RMY 27
05/28 57/48/53/-8/0.31/0.0/009/01           26 E   AERO 22 ESE  RMY 25
05/29 51/45/48/-13/0.04/0.0/000/00          21 NNW AERO 21 NNW  RMY N/A
05/30 63/46/55/-6/0.36/0.0/000/00           23 S   AERO 23 S    RMY 25
05/31 72/54/63/2/0.26/0.0/786/87            28 N   AERO 23 N    RMY 26


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 Low temp since midnight is 61F; normal low is 58F

*Estimated

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: Benjamin Turner