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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JULY 27, 2014  
ALL TIMES ARE IN EASTERN STANDARD TIME

THUNDERSTORMS AND HEAVY DOWNPOURS BEGIN BY MID
MORNING TODAY

Mostly clear skies overnight gave way to overcast
conditions by early morning today ahead of an approaching
warm front. A line of heavy rain and thunderstorms moved
past the station beginning with a thunderstorm at 10:12 EST
and heavy rain at 10:23 AM EST. Winds gusted from the SW to
nearly 30 MPH during this time, with 0.57 inches of rain
collected in our gauge by the 1:00 PM EST observation.

More storms are firing on the radar across New England
with a significant chance of severe thunderstorms in our 
area later on today. 
 
Today's Observations:

7 A.M.
Weather: Thin overcast of stratocumulus, breaks in overcast
overhead
Temperature: 70F; Dew Point: 66F; Wind: SSW at 9 kts
Sea-level pressure: 29.85 ins. Hg, falling then falling more slowly    
Visibility: 20 miles, 9 miles WNW-NE light fog in all directions  
6-hr max temp: 70F
6-hr min temp: 65F
24-hr precip: none
BHO SA 1155 E4 -OVC 20 108/70/66/2009/985/ VSBY WNW-NE 9 MI LGT FG 
ALQDS BINOVC OVHD/ 8/500 56008 10070 20065

10 A.M.  
Weather: Light rain shower, scattered moderate cumulus,
broken alto/nimbostratus, thin overcast cirrus, 
few cumulus fractus in all direction, towering cumulus distant SE,
rain began at 9:54 AM EST
Temperature: 74F; Dew Point: 67F; Wind: S at 14G18 kts, 
Sea-level pressure: 29.81 ins. Hg, falling, then more quickly    
Visibility: 20 miles, obscured by light rain
3-hr precip: Trace
BHO SA 1455 42 SCT E90 BKN 250 -OVC 20RW- 096/74/67/1814G18/981/ 
RWB54 TCU DSNT SW FEW CUFRA ALQDS PRCP VRY LGT BINOVC DSNT SE/ 
8/221 58012 MANUAL 6000/ 

1 P.M.  
Weather: Thunderstorm W, moving NE, overcast stratus,
light rain showering beginning 12:52 PM EST, few patches
of fog drifting below the summit in all directions
Temperature: 69F; Dew Point: 68F; Wind: S at 16G22 kts 
Sea-level pressure: 29.78 ins. Hg, falling then falling more quickly
Visibility: 15 miles, 11 miles WNW-NNE, obscured by rain showers 
6-hr max temp: 75F  
6-hr min temp: 69F
6-hr precip: 0.57 inches      
BHO SA 1755 E11 OVC 15RW- 085/69/68/1916G22/978/ TB43RWB52 TS W MVNG 
NE VSBY WNW-NNE 11 MI FEW PTCHS FG DRFTG BLO SMT ALQDS/ 8/6// 58011 
ASOS 60059 MANUAL 60057 10075 20069 

WEATHER SUMMARY FOR SATURDAY, JULY 26, 2014  

TEMPERATURE (DEGREES F)
MAX.....82    NORMAL.....81
MIN.....63    NORMAL.....63
MEAN....73    NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL.........................+1
TOTAL DEPARTURE FOR THE MONTH........................+28 [+0.9 DEGREES/DAY]

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............8   DEPARTURE..........+0
TOTAL COOLING UNITS FOR THE MONTH............201   DEPARTURE.........+16
TOTAL COOLING UNITS FOR THE SEASON...........310   DEPARTURE..........-4
TOTAL COOLING UNITS LAST SEASON TO DATE......449   DIFFERENCE.......-139

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY..................28  SSW AT  3:59 P.M.*    
                   ASOS.......................31  SSW AT  3:59 P.M.  
                   DAVIS......................29  SSW AT  3:58 P.M. RMY 32       
FASTEST MILE FOR YESTERDAY....................23  SSW AT  4:03 P.M.*                
MAXIMUM 2-MINUTE ASOS AVERAGE.................22  SW  AT  4:05 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE................22  SSW AT  3:25 P.M.             
AVERAGE WIND SPEED AND DIRECTION..............12.3 SW		
                   ASOS.......................12.2 
                   DAVIS..................... 11.1 SW [223 degrees] 

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..........4.36  DEPARTURE..........+0.12	    
                         ASOS..............4.32  
TOTAL PRECIPITATION FOR THE YEAR..........28.91  DEPARTURE..........-2.30	 
                         ASOS.............28.83 

PRELIMINARY CLIMATE SUMMARY FOR JULY 2014 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  85/66/76/+6/0.00/695/76              31 SSW RMY 36
7/2  89/69/79/+9/T/639/70                 33 SSW RMY 38 
7/3  91/68/80/+9/0.05/611/67              29 W   RMY 30  TSTM
7/4  72/61/67/-4/2.48/027/03              28 N   RMY N/A TSTM
7/5  77/55/66/-5/0.27/738/81              36 NW  RMY N/A 
7/6  83/61/72/+1/0.00/892/98              29 SW  RMY 33
7/7  85/65/75/+4/T/563/62                 33 SW  RMY 38  TSTM [NO RAIN] 
7/8  89/70/80/+8/0.00/763/84              31 SW  RMY 38 
7/9  86/70/78/+6/0.00/779/86              28 SSW RMY N/A	
7/10 80/65/73/+1/0.00/597/66              16 NW  RMY N/A
7/11 76/62/69/-3/0.00/732/81              22 NE  RMY N/A 
7/12 85/60/73/+1/0.00/849/94              21 S   RMY 25 
7/13 82/64/73/+1/0.01/676/75              31 S   RMY 35
7/14 83/69/76/+4/0.54/207/23              25 S   RMY 27
7/15 82/70/76/+4/0.02/135/15              26 S   RMY 29 TSTM
7/16 73/65/69/-3/0.98/000/00              27 SSW RMY 32 TSTM
7/17 79/62/71/-1/T/573/64                 15 WSW RMY 17 
7/18 80/60/70/-2/0.00/822/92              15 NW  RMY 16
7/19 77/63/70/-2/0.00/054/06              13 E   RMY 14 
7/20 72/60/66/-6/T/312/35                 16 ENE RMY 16
7/21 76/59/68/-4/0.00/667/75              16 E   RMY 19
7/22 88/63/76/+4/0.00/816/92              22 SSW RMY 25 
7/23 88/68/78/+6/0.00/770/87              29 S   RMY 32
7/24 74/63/69/-3/0.01/291/33              18 ENE RMY 18
7/25 80/56/68/-4/0.00/.../..              18 NW  RMY N/A       
7/26 82/63/73/+1/0.00/.../..              28 SSW RMY 32

7/27 morning low of 63F; the normal low is now 63F
 
DAILY RECORDS FOR JULY 2014:

7/4  NEW DAILY RECORD RAINFALL OF 2.48 ins;
     surpasses previous record of 1.78 ins. in 1950
7/16 NEW DAILY RECORD RAINFALL OF 0.98 ins;
     surpasses previous record of 0.89 ins. in 1919

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

RECORDS FOR JULY 27
HIGH 95F IN 1949, 1963
LOW 50F IN 1920, 2001
PRE 4.01 INS IN 1979
WIND 47 MPH ENE IN 1984

RECORDS FOR JULY 28
HIGH 97F IN 1931
LOW 49F IN 1903
PRECIP 3.32 INS IN 1911
PEAK GUST 62 MPH SW IN 2006

TODAY'S REPORT PREPARED BY: Brian Fitzgerald