BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, JULY 28, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME

HOT AND VERY HUMID AGAIN TODAY...TOWERING CUMULUS WITH
THUNDERSTORMS IN THE AREA AT MID-DAY...
The high temperature has climbed to the mid-80s by early 
afternoon today with the dew point near 70. Cumulonimbus
have formed in a line west to northwest of the Observatory
with numerous rain shafts visible in those directions at
mid-day. Lightning and thunder were observed at 12:58 PM EDT, 
though no rain as occurred here during the day through 2 PM EDT. 
A rain shower brought 0.37 inch of rain in less than an hour 
just after midnight.   


Today's observations:
 
7 A.M.   
Weather: Partial obscuration in fog, overcast stratocumulus
Temperature: 72F, Dew point: 71F, Wind: S at 7 kts
Sea-level pressure: 29.91 inches Hg, rising
Visibility: 11/2 miles, fog 
6-hour min temp: 70F     
24-hour rainfall: 0.37 in. 
BHO SA 1155 –X E2 OVC 11/2VF 128/72/71/1707/991/ F7 VSBY 1/2V21/2 
VSBY INCR WND LGT/ 8/5// 52010 6027/ 70037 10072 20070

10 A.M.   
Weather: Broken cumulus and cirrus; moderate cumulus with
a few towering cumulus NW-SE; rain shower N; hazy
Temperature: 78F, Dew point: 71F, Wind: SSW at 8 kts
Sea-level pressure: 29.91 inches Hg, steady
Visibility: 35 miles, hazy  
BHO SA 1455 25 SCT E40 BKN 250 BKN 35 128/78/71/2008/991/ FEW CUFRA 
MDT CU ALQDS FEW TCU NW-SE RW N 20 MVNG NNE HAZY WND LGT/ 8/201 54000

1 P.M.   
Weather: Broken cumulus and cirrus; thunder ended 1213 EST
Temperature: 85F, Dew point: 70F, Wind: S at 10 kts
Wind: Variable in direction SSE-SSW
Sea-level pressure: 29.87 inches Hg, falling
Visibility: 30 miles, hazy    
6-hourly max. temp: 90F    
BHO SA 1755 30 SCT E40 BKN 200 BKN 30 114/85/70/1810/987/ FEW HIR CI 
FEW LWR CU DSNT W-NE RW WNW MVNG NE TB1658E13 VSBY NW 15 SE-S 40 HAZY
WND 15V21/ 8/201 56014 10085 20072

WEATHER SUMMARY FOR FRIDAY, JULY 27
 
TEMPERATURE (DEGREES F)
MAX.....90    NORMAL.....82 
MIN.....69    NORMAL.....63
MEAN....80    NORMAL.....72
DEPARTURE FROM 30-YEAR NORMAL........+8
TOTAL DEPARTURE FOR THE MONTH........-1  (-0.2 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............29   S AT 4:57 P.M.       
                   AEROVANE...............26   S AT 4:30 P.M.       
                   ASOS...................N/A  #
                   DAVIS..................29 SSE AT 4:58 P.M.           
FASTEST MILE FOR YESTERDAY................23   S AT 4:58 P.M.           
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............20 SSE AT 4:59 P.M.            
AVERAGE WIND SPEED AND DIRECTION.........11.2  S  
                   ASOS...................N/A  #
                   DAVIS.................10.5  S [184 deg]  
 
# ASOS WINDS SWITCHED OFF BY NWS 6/6, IT IS NOT KNOWN WHEN 
  THAT DATA WILL RESUME
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.37  DEPARTURE.....+0.25
                         ASOS..............0.37 
TOTAL PRECIPITATION FOR THE MONTH..........1.84  DEPARTURE.....-1.42 
                         ASOS..............1.73    
TOTAL PRECIPITATION FOR THE YEAR..........28.82  DEPARTURE.....-0.11
                   ASOS FOR YEAR..........28.14     

PRELIMINARY CLIMATE SUMMARY FOR JULY 2007......CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
7/1  70/52/61/-9/0.02/649/71/ 28 W      
7/2  73/50/62/-8/0/841/92/    29 WNW 
7/3  75/53/64/-6/0/839/92/    23 NW 
7/4  78/58/68/-2/0.09/465/51/ 45 SSE 
7/5  80/61/71/ 0/0.25/383/42/ 38 SSE TSTM   
7/6  83/62/73/+2/0.01/482/53/ 46 WNW TSTM  
7/7  81/60/71/0/0/509/56/     32 WSW   
7/8  90/62/76/+5/0.41/563/62/ 36 NW Aero 33 MPH TSTM 
7/9  86/61/74/+3/0.20/354/39  27 NNE TSTM
7/10 80/62/71/0/0/680/75      27 S 
7/11 84/70/77/+5/T/371/41     32 S
7/12 81/64/73/+1/0.01/813/90  27 WNW
7/13 84/62/73/+1/0/695/77     36 WSW
7/14 82/62/72/0/T/765/85      33 SSE
7/15 87/65/76/+4/T/638/71     44 S  Aero 45 MPH S, Davis 48 MPH S     
7/16 84/65/75/+3/0/449/50     18 WNW 
7/17 85/65/75/+3/0/591/66     18 WNW
7/18 71/66/69/-3/0.21/000/00  23 SE   
7/19 83/65/74/+2/0.20/205/23  31 S   
7/20 82/61/72/0/0/330/37      29 WSW
7/21 77/58/68/-4/0/436/49     23 WNW 
7/22 77/61/69/-3/0/826/93     24 ENE 		
7/23 64/60/62/-10/0.07/000/00 32 NNE
7/24 82/62/72/-1/0/796/90     25 SW
7/25 88/63/76/+3/0/.../..     21 WSW  Aero 18 MPH SW
7/26 91/65/78/+6/0/.../..     21 S
7/27 90/69/80/+8/0/.../..     29 S

7/28 morning low temp. 70 deg; normal low now 63 deg.  
  
NEW DAILY RECORDS FOR JULY 2007:  

None to date

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

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

RECORDS FOR JULY 29
HIGH 97F IN 1949
LOW  53F IN 1888,1914
PRECIP 1.53 INCHES IN 1901
PEAK GUST 40e MPH E IN 1941

TODAY'S REPORT PREPARED By: Mike Iacono and Eli Melaas
 
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