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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JUNE 11, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME

CONDITIONS IMPROVE THROUGHOUT THE DAY FOLLOWING 
OVERNIGHT RAINFALL....

Rain last night left 1.11 inches in the gauge,
with an extra 0.19 inches falling after the 
7 A.M. observation. Weather conditions improved
as the day went on, with 70 miles of visibility
being seen at 1 P.M. A wind shift from S-WNW was
observed around 9 A.M. this morning, with a peak
gust of 28 mph occurring a half hour before 
noontime. The high so far today is 71F, 3 degrees 
under the normal of 74F. The low since midnight 
is 65F, 9 degrees above the daily normal minimum 
of 56F.


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: N/A

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: N/A
Astronomical total minutes:   N/A


Today's Observations:

7 A.M.
Weather: Rain and fog
Temperature: 65F; Dew Point: 65F; Wind: S at 11 kts
Sea-level pressure: 29.80 ins. Hg, falling, then steady
Visibility: 1/2 miles
6-hr Max temp: 66F
6-hr Min temp: 65F
24-hr Precip: 1.11 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins. 
BHO SA 1155 W3 X 1/2RF 092/65/65/1711/980/ 8//// 
70111 56006 10066 20065

10 A.M.
Weather: scattered stratus fractus, overcast nimbostratus 
Temperature: 67F; Dew Point: 67F; Wind: WNW at 6 kts,
Wind: Light
Sea-level pressure: 29.79 ins. Hg, falling, then steady 
Visibility: 10 miles, 70 miles NW-NNW
3-hr Precip: 0.15 ins.  
BHO SA 1455 10 SCT 65 OVC 10R-F 088/67/67/2906/979/
WND LGT VSBY 70 NW-NNW R-CTD/ 8/72/ 6015/ 56004 

1 P.M.
Weather: Scattered cumulus, broken altostratus 
Temperature: 71F; Dew Point: 62F; Wind: WNW at 10G21 kts
Sea-level pressure: 29.79 ins. Hg, rising steadily
Visibility: 70 miles
6-hr Max temp: 71F
6-hr Min temp: 64F
6-hr Precip: 0.19 ins. 
BHO SA 1755 25 SCT E140 BKN 70 089/71/62/2910G21/979/
8/110 6019/ 53001 10071 20064

SUMMARY FOR MONDAY, JUNE 10, 2019 

TEMPERATURE (DEGREES F)
MAX.....79   NORMAL.....73
MIN.....54   NORMAL.....56
MEAN....67   NORMAL.....65

DEPARTURE FROM 30-YEAR NORMAL......................+2
TOTAL DEPARTURE FOR THE MONTH.....................+22 [+2.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE.........0
TOTAL HEATING UNITS FOR THE MONTH..............13   DEPARTURE........-27
TOTAL HEATING UNITS FOR THE SEASON...........6232   DEPARTURE.......-111
TOTAL HEATING UNITS LAST SEASON TO DATE......5898   DIFFERENCE......+334

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............2   DEPARTURE.........-1
TOTAL COOLING UNITS FOR THE MONTH..............20   DEPARTURE.........-1
TOTAL COOLING UNITS FOR THE SEASON.............28   DEPARTURE........-17
TOTAL COOLING UNITS LAST SEASON TO DATE........74   DEPARTURE........-46

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY....................26  SSE AT  11:21 P.M.
                   AERO.........................25  SSE AT  11:32 P.M.
                   ASOS.........................2   S   AT  11:42 P.M.
                   DAVIS........................28  SE  AT  11:41 P.M.  RMY 33
FASTEST MILE FOR YESTERDAY......................21  SSE AT  11:35 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE...................20  S   AT  11:36 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..................21  SSE AT  11:36 P.M.
AVERAGE WIND SPEED AND DIRECTION.................10.0 SSE
                   ASOS..........................9.7
                   DAVIS.........................10.0 SSW [158 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....1.11  DEPARTURE.......+0.95
                         ASOS..............1.02
TOTAL PRECIPITATION FOR THE MONTH..........1.24  DEPARTURE.......-0.41
                         ASOS..............1.24
TOTAL PRECIPITATION FOR THE YEAR..........27.03  DEPARTURE.......+2.72
                         ASOS.............26.97


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/.../..           21 S   AERO 21 SSE  RMY 21
05/02 45/41/43/-10/0.02/0.0/.../..          21 NE  AERO 21 SSW  RMY 20
05/03 60/43/52/-1/..../0.0/.../..           23 S   AERO 23 S    RMY 22
05/04 54/46/50/-4/..../0.0/.../..           14 ENE AERO 14 ENE  RMY 17
05/05 52/44/48/-6/0.00/0.0/.../..           18 NE  AERO 20 NE   RMY N/A
05/06 58/44/51/-3/..../0.0/.../..           25 NE  AERO 26 ENE  RMY 24
05/07 72/41/57/+2/0.12/0.0/.../..           30 S   AERO 29 S    RMY 30
05/08 67/48/58/+3/0.00/0.0/.../..           20 NE  AERO 20 NE   RMY 19
05/09 60/43/52/-3/0.00/0.0/.../..           21 SE  AERO 21 E    RMY 22
05/10 61/46/54/-1/0.16/0.0/.../..           35 S   AERO 37 S    RMY 37
05/11 68/50/59/+3/..../0.0/.../..           26 NW  AERO M  M    RMY N/A
05/12 50/36/43/-13/0.68/T/.../..            30 ENE AERO M  M    RMY N/A
05/13 52/38/45/-11/..../0.0/.../..          35 E   AERO M  M    RMY 34
05/14 44/38/41/-16/..../0.0/.../..          26 NNE AERO M  M    RMY 25
05/15 58/40/49/-8/..../0.0/.../..           28 NW  AERO M  M    RMY 28
05/16 68/46/57/0/..../0.0/.../..            17 NW  AERO M  M    RMY 19
05/17 64/49/57/0/..../0.0/.../..            22 WNW AERO 21 WNW  RMY 25
05/18 72/49/61/+3/..../0.0/.../..           26 SSE AERO 25 SSE  RMY 29
05/19 69/50/60/+2/..../0.0/.../..           39 S   AERO 43 SSE  RMY 42
05/20 85/52/69/11/..../0.0/.../..           35 SW  AERO 40 SW   RMY 39
05/21 69/52/61/+2/0.00/0.0/.../..           40 NW  AERO 46 NW   RMY 45
05/22 68/49/59/0/0.00/0.0/.../..            32 NNW AERO 29 NW   RMY N/A
05/23 68/48/58/-1/..../0.0/.../..           36 SSW AERO 37 SSW  RMY 40
05/24 68/47/58/-1/..../0.0/.../..           47 NW  AERO 47 NW   RMY 51
05/25 75/47/61/+1/..../0.0/.../..           M  M   AERO 35 SSW  RMY 39
05/26 85/49/67/+7/..../0.0/.../..           40 W   AERO 38 W    RMY 39
05/27 76/57/67/+7/..../0.0/.../..           30 NE  AERO 22 NE   RMY 27
05/28 57/48/53/-8/..../0.0/.../..           26 E   AERO 22 ESE  RMY 25
05/29 51/45/48/-13/..../0.0/.../..          21 NNW AERO 21 NNW  RMY N/A
05/30 63/46/55/-6/..../0.0/.../..           23 S   AERO 23 S    RMY 25
05/31 72/54/63/2/..../0.0/.../..            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 Low temp since midnight is 65F; normal low is 56F


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

RECORDS FOR JUNE 11
HIGH 92F IN 1973, 1984
LOW 40F IN 1972
PRECIP 2.66 INCHES IN 1922
PEAK GUST 43e MPH S IN 1945

RECORDS FOR JUNE 12
HIGH 94F IN 2017
LOW 40F IN 1906
PRECIP 1.79 INS 1955
PEAK GUST 58 MPH NW IN 1991

TODAY'S REPORT PREPARED BY: Benjamin Turner