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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JULY 5, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME

HAZY, HOT, AND HUMID

Temperatures are quite hot again today, although shy of any records by
several degrees.  The high temperature so far today has reached 91.5F, but
could climb higher and make this the hottest day of 2013 thus far.  The
highest temperature recorded so far for the year is 92.3F on May 31.

The dew point temperature continues to run quite high, in the lower 70s.
This is producing heat index values in the 95-100F range today.  The
abundant moisture in the air is contributing to hazy conditions, too.

Today's Observations:

7 A.M. 
Weather: Clear, few cirrus distant W-WNW, thin smoke/haze layer distant
all quadrants, thin smoke layer aloft distant W-NNE, hazy
Temperature: 78F; Dew Point: 72F; Wind: WSW at 8 kts.
Sea-level pressure: 30.19 ins. Hg, rising
Visibility: 25 miles, hazy
6-hour min. temp: 73F
BHO SA 1155 CLR 25 222/78/72/2508/019/ FEW CI DSNT W-WNW THN K/HZ LYR
DSNT ALQDS THN K LYR ALF DSNT W-NNE HAZY/ 8/001 51014 10078 20073

10 A.M. 
Weather: Scattered cumulus, scattered thin cirrus, small cumulus forming
all quadrants except NE-ENE, few cirrus W-NNW, thin smoke layer distant
all quadrants, cumulonimbus top visible distant NNW, hazy
Temperature: 87F; Dew Point: 74F; Wind: W at 5 kts,
Wind: Light and variable
Sea-level pressure: 30.17 ins. Hg, falling
Visibility: 35 miles, WNW 45 miles, hazy
Heat Index: 95F
BHO SA 1455 30 SCT 250 –SCT 35 217/87/74/2605/017/ SML CU FRMG ALQDS XCPT
NE-ENE FEW CI W-NNW THN K LYR DSNT ALQDS CB TOP VSBL DSNT NNW VSBY WNW 45
HAZY WND LGT AND VRB HEAT INDEX 95/ 8/901 58005

1 P.M.
Weather: Scattered cumulus, scattered thin cirrus, moderate cumulus and
cumulus fractus all quadrants, cirrus distant NW-NNE, hazy
Temperature: 89F; Dew Point: 72; Wind: SSW at 10 kts,
Wind: Direction variable S-SW
Sea-level pressure: 30.13 ins. Hg, falling
Visibility: 50 miles, hazy
6-hour max. temp: 92F
Heat Index: 96F
BHO SA 1755 40 SCT 250 –SCT 50 204/89/72/2010/013/ MDT CU AND CUFRA ALQDS
CI DSNT NW-NNE HAZY WND 17V23 HEAT INDEX 96/ 8/201 58013 10092 20078

WEATHER SUMMARY FOR THURSDAY, JULY 4, 2013

TEMPERATURE (DEGREES F)
MAX.....90     NORMAL.....80
MIN.....71     NORMAL.....62
MEAN....81     NORMAL.....71
 
DEPARTURE FROM 30-YEAR NORMAL....................+10
TOTAL DEPARTURE FOR THE MONTH....................+22 [+5.3 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY................25 WSW AT  4:12 P.M.
                   AERO.....................26 SW  AT  8:17 P.M.
                   ASOS.....................28 WSW AT  4:12 P.M.
                   DAVIS....................27 WSW AT  4:11 P.M. RMY 28
FASTEST MILE FOR YESTERDAY..................19 SW  AT  8:33 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE...............20 SW  AT  8:34 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE..............20 SW  AT  8:18 P.M.
AVERAGE WIND SPEED AND DIRECTION..........12.7 SW
                   ASOS...................11.6 
                   DAVIS..................11.4 SW [234 deg]
* last of several occurrences....

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE...........-0.10
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.05   DEPARTURE...........-0.38
                         ASOS..............0.05
TOTAL PRECIPITATION FOR THE YEAR..........32.25   DEPARTURE...........+4.85
                         ASOS..............N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals	
	
PRELIMINARY CLIMATE SUMMARY FOR JULY 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011 
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
                              
7/1  82/69/76/+6/0.05/.../..         29 S   AERO 31 MPH SSW RMY 32
7/2  82/61/72/+2/T/.../..            23 SSW AERO 23 MPH SSW RMY 25
7/3  87/62/75/+4/T/.../..            28 SW  AERO 30 MPH SW  RMY 30
7/4  90/71/81/+10/0.00/.../..        25 WSW AERO 26 MPH SW  RMY 28

7/5  morning low temp: 73F; the normal low is now 62F

DAILY RECORDS FOR JULY 2013
None so far.

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

RECORDS FOR JULY 5
HIGH 98F IN 1911
LOW 48F IN 1920, 1927 & 1979
PRECIP 1.45 INS IN 1922
PEAK GUST 44e N IN 1944

RECORDS FOR JULY 6
HIGH 99F IN 2010
LOW 47F IN 1979
PRECIP 1.43 INCHES IN 2005
PEAK GUST 56e MPH NNW IN 1942, 56 MPH WNW IN 1999

TODAY'S REPORT PREPARED BY: Sean Fankhauser