BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JULY 14, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

SHOWERS MOVE THROUGH THIS MORNING, HUMIDITY
REMAINS IN PLACE

Light showers began this morning at 9:18 AM EST from
a line of showers that has crept up from the S. 
Cumulonimbus tops were visible at this morning's 7:00 AM EST
observation to the S moving N with small cells that have gradually
weakened. By the 10:00 AM EST observation 0.01 inches of new
rain were recorded.

By the 1:00 PM EST observation an additional trace of new
rain had fallen. Skies had cleared somewhat under intermittent
bright sunshine. Dew points have remained in the 60s today,
with a maximum temperature so far of 80F and hazy conditions. 


Today's Observations:
 
7 A.M.
Weather: Scattered altocumulus, scattered cirrocumulus,
cumulonimbus tops visible SSW and SSE moving N, few cumulus/
cumulus fractus in all directions, few altocumulus castellanus
distant SSE-SW
Temperature: 71F; Dew Point: 65F; Wind: SE at 7 kts
Sea-level pressure: 29.80 ins. Hg, decreasing, then increasing and lower 
Visibility: 15 miles, hazy, thin fog
6-hr Max temp: 71F
6-hr Min temp: 64F
24-hr precip: none
BHO SA 1155 90 SCT 200 SCT 15 093/71/65/1407/980/ 
CB TOPS VSBL SSW AND SSE MOV N FEW CU/CUFRA ALQDS 
FEW ACC DSNT SSE-SW THN FG ALQDS HAZY/ 8/989 56001 10071 20064

10 A.M.
Weather: Light rain showers begins 9:18 AM EST, ends 9:35,
begins again 9:52 AM EST, broken stratus fractus, broken
stratocumulus, overcast nimbostratus
Temperature: 73F; Dew Point: 68F; Wind: SSE at 12G18 kts
Sea-level pressure: 29.75 ins. Hg, falling, then steady
Visibility: 20 miles, except 15 miles NW, light rain showers,
thin fog
3-hr precip: 0.01 inches
BHO SA 1455 E30 BKN 50 BKN 110 OVC 20RW- 076/73/68/1512G18/975/ 
RW-B18E35B52 VSBY NW 15 MI THN FG ALQDS/ 8/72/ 56017 MANUAL 60001 

1 P.M.
Weather: Scattered cumulus, scattered altocumulus,
broken dense cirrus
Temperature: 78F; Dew Point: 66F; Wind: SSE at 7 kts
Sea-level pressure: 29.71 ins. Hg, falling, then more quickly 
Visibility: 30 miles, hazy
6-hr Max temp: 80F
6-hr Min temp: 71F
6-hr precip: 0.01 inches
BHO SA 1755 25 SCT 60 SCT E250 BKN 30 060/78/66/1607/971/ 
HAZY/ 8/132 58016 MANUAL 60001 10080 20071


SUMMARY FOR MONDAY, JULY 13, 2015 
  
TEMPERATURE (DEGREES F)
MAX.....82   NORMAL.....81
MIN.....66   NORMAL.....63
MEAN....74   NORMAL.....72
 
DEPARTURE FROM 30-YEAR NORMAL........................+2
TOTAL DEPARTURE FOR THE MONTH.......................+11 [+0.6 DEGREES/DAY]
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY...............9   DEPARTURE..........+2
TOTAL COOLING UNITS FOR THE MONTH..............93   DEPARTURE..........+8
TOTAL COOLING UNITS FOR THE SEASON............231   DEPARTURE.........+17
TOTAL COOLING UNITS LAST SEASON TO DATE.......225   DIFFERENCE.........+6
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...................21  E    AT   7:48 A.M.                
                   ASOS........................20  ESE  AT   7:46 A.M.
                   DAVIS.......................19  E    AT   7:45 A.M. RMY 20
FASTEST MILE FOR YESTERDAY.....................15  S    AT  10:46 P.M.          
MAXIMUM 2-MINUTE ASOS AVERAGE..................15  S    AT  11:56 P.M.                 
MAXIMUM 2-MINUTE DAVIS AVERAGE.................14  S    AT  10:47 P.M.         
AVERAGE WIND SPEED AND DIRECTION...............8.3 ENE
                   ASOS........................8.3
                   DAVIS.......................7.3 E [090 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00  DEPARTURE.....-0.14
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........2.64  DEPARTURE.....+1.12
                         ASOS...............2.69
TOTAL PRECIPITATION FOR THE YEAR.......... 26.91  DEPARTURE.....-1.58
                         ASOS...............N/A ***

*** ASOS annual totals not available due to erroneous readings
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 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

7/1  80/63/72/+2/0.59/.../..               30 SSE RMY 33  TSTM
7/2  78/60/69/-1/0.00/.../..               23 WNW RMY N/A
7/3  79/58/69/-2/0.00/.../..               17 SSW RMY 17 
7/4  74/61/68/-3/T/.../..                  16 S   RMY N/A
7/5  82/58/70/-1/0.00/.../..               20 WSW RMY 20  
7/6  85/64/75/+4/0.00/.../..               20 S   RMY 21
7/7  84/65/75/+4/0.02/.../..               35 S   RMY 40
7/8  87/68/78/+6/T/.../..                  23 NE  RMY N/A
7/9  73/61/67/-5/..../.../..               24 NE  RMY 25
7/10 80/59/70/-2/..../.../..               18 W   RMY N/A TSTM
7/11 84/61/73/+1/0.00/.../..               21 NW  RMY 19
7/12 88/67/78/+6/0.00/.../..               20 W   RMY 17
7/13 82/66/74/+2/0.00/.../..               21 E   RMY 20

7/14 low since midnight is 64F; normal low is now 63F
 
DAILY RECORDS FOR JULY 2015

7/10- NEW RECORD DAILY PRECIPITATION PENDING OF X.XX in 2015
surpasses previous record of 1.68 in. in 1933
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated): 

RECORDS FOR JULY 14
HIGH 98F IN 1952
LOW 51F IN 1895, 1937
PRECIP 1.97 INS IN 1960
WIND 110e MPH NW IN 1942 [RECORD FOR MONTH]

RECORDS FOR JULY 15
HIGH 94F IN 1995
LOW 50F IN 1929, 1930
PRECIP 1.64 INS IN 1896
WIND 71 MPH WNW IN 2002

TODAY'S REPORT PREPARED BY: Brian Fitzgerald