BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 19, 2015 
ALL TIMES ARE IN EASTERN STANDARD TIME

MOISTURE MOVES THROUGH THE REGION, ONLY A TRACE
FROM MORNING SHOWERS

Yesterday afternoon's maximum of 76F reached the
exact daily normal maximum temperature, as a damper
air mass move through the region overnight. Temperatures
dipped to a slightly warmer than normal 60F. 

A brief shower left just a trace of new rain this morning,
increasing abnormally dry conditions on Great Blue Hill.
Following another dry day yesterday, precipitation for the
year is now 3.84 inches below normal.
 
Towering cumulus were present during the 1:00 PM EST
observation as a frontal passage was occurring. Development
of cumulus were seen ahead of the front just to the SE
of Great Blue Hill.

 
Today's Observations:
 
7 A.M.
Weather: Scattered cumulus fractus, broken altocumulus,
overcast altostratus, showers distant ENE
Temperature: 64F; Dew Point: 60F; Wind: SW at 9 kts
Sea-level pressure: 29.88 ins. Hg, about the same
Visibility: 20 miles, thin fog
6-hr Max temp: 64F
6-hr Min temp: 60F
24-hr precip: Trace 
BHO SA 1155 10 SCT E90 BKN 120 OVC 20 118/64/60/2309/988/ 
RW-B51E51 SHWRS DSNT ENE THN FG ALQDS/ 8/71/ 50000 MANUAL 
6000/ 10064 20060

10 A.M.
Weather: Scattered altocumulus, broken cirrostratus,
broken cirrus, few stratocumulus/cumulus in all directions
Temperature: 74F; Dew Point: 65F; Wind: NW at 9 kts
Sea-level pressure: 29.90 ins. Hg, steady, then rising 
Visibility: 30 miles, hazy 
BHO SA 1455 120 SCT E200 BKN 250 BKN 30 124/74/65/3209/990/ 
FEW SC/CU ALQDS HAZY/ 8/531 53006

1 P.M.
Weather: Scattered cumulus, scattered moderate cumulus,
broken cirrus, showers distant ESE, towering cumulus
distant E-SE
Temperature: 81F; Dew Point: 62F; Wind: NW at 9 kts
Sea-level pressure: 29.90 ins. Hg, rising slightly 
Visibility: 40 miles, hazy
6-hr Max temp: 81F
6-hr Min temp: 63F
6-hr precip: none
BHO SA 1755 32 SCT 50 SCT E250 BKN 40 126/81/62/3209/990/ 
SHWRS DSNT ESE TCU DSNT E-SE MDT CU NE-S FROPA HAZY/ 
8/201 51002 10081 20063 
 

SUMMARY FOR THURSDAY, JUNE 18, 2015 
  
TEMPERATURE (DEGREES F)
MAX.....76   NORMAL.....76
MIN.....54   NORMAL.....58
MEAN....65   NORMAL.....67
 
DEPARTURE FROM 30-YEAR NORMAL........................-2 
TOTAL DEPARTURE FOR THE MONTH.......................-35 [-2.1 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0  DEPARTURE...........-2
TOTAL HEATING UNITS FOR THE MONTH..............87  DEPARTURE..........+27 
TOTAL HEATING UNITS FOR THE SEASON...........6491  DEPARTURE.........+128
TOTAL HEATING UNITS LAST SEASON TO DATE......6421  DIFFERENCE.........+70
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............0   DEPARTURE..........-4
TOTAL COOLING UNITS FOR THE MONTH.............41   DEPARTURE..........-6
TOTAL COOLING UNITS FOR THE SEASON............90   DEPARTURE.........+19
TOTAL COOLING UNITS LAST SEASON TO DATE.......58   DIFFERENCE........+32
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................22  S    AT   7:21 P.M.                  
                   ASOS.......................23  S    AT   7:21 P.M.                 
                   DAVIS......................22  S    AT   7:21 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY....................16  S    AT   7:13 P.M.         
MAXIMUM 2-MINUTE ASOS AVERAGE.................17  SSW  AT  11:10 P.M.                
MAXIMUM 2-MINUTE DAVIS AVERAGE................16  S    AT   7:13 P.M.          
AVERAGE WIND SPEED AND DIRECTION..............10.1 S 
                   ASOS.......................10.3
                   DAVIS......................8.9 SSW [207 deg.] 
*last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....TRACE   DEPARTURE....-0.14
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........2.18   DEPARTURE....-0.68 
                         ASOS...............2.19
TOTAL PRECIPITATION FOR THE YEAR.......... 21.55   DEPARTURE....-3.84
                         ASOS...............N/A ***
*** ASOS annual totals not available due to erroneous readings
 
PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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

6/1  48/46/47/-15/0.69/000/00              32 NE  RMY 34
6/2  47/44/46/-16/..../000/00              28 NNE RMY 28
6/3  59/44/52/-10/0.00/172/19              16 ESE RMY 16
6/4  63/46/55/-8/0.00/445/49               17 E   RMY 16
6/5  70/49/60/-3/T/500/55                  17 NNE RMY 17
6/6  65/52/59/-4/0.06/382/42               26 ENE RMY 27
6/7  73/49/61/-3/0.00/884/97               28 S   RMY 29
6/8  73/50/62/-2/T/310/34                  41 SSW RMY 48
6/9  76/61/69/+4/0.03/228/25               29 SSW RMY 32  
6/10 82/57/70/+5/0.00/840/92               24 WSW RMY N/A  
6/11 85/61/73/+8/0.00/.../..               29 SSW RMY 32
6/12 86/65/76/+11/..../.../..              26 S   RMY 29 
6/13 83/67/75/+10/T/.../..                 24 N   RMY 27
6/14 75/61/68/+2/0.00/.../..               21 SSE RMY 21
6/15 61/52/57/-9/..../000/00               25 SE  RMY 26
6/16 73/56/65/-1/..../.../..               18 NW  RMY N/A 
6/17 70/57/64/-3/0.00/.../..               28 NE  RMY 28
6/18 76/54/65/-2/0.00/.../..               22 S   RMY 26

6/19 low since midnight is 60F; normal low is now 58F
 
DAILY RECORDS FOR JUNE 2015
6/1- NEW RECORD LOW MAXIMUM TEMPERATURE OF 48F
surpasses previous record of 51F in 2004
 
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: Brian Fitzgerald