BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JULY 27, 2007   
ALL TIMES ARE IN EASTERN STANDARD TIME
 
CONTINUED HOT, HUMID, and HAZY...
 
The temperature has approached 90 degrees again under mostly sunny skies
on another warm summer afternoon at the observatory. Visibilities
are falling as the haze increases under light winds from the southwest.
The weekend should bring continued warm and muggy weather and increasing 
clouds with a chance of showers and storms.
 
Today's observations:
 
7 A.M.   
Weather: Scattered altocumulus and altocumulus lenticularis
and a smoke layer along the southern horizon
Temperature: 74F, Dew point: 67F, Wind: SSW at 09 kts
Sea-level pressure: 30.02 inches Hg, falling
Visibility: 20 miles, hazy 
6-hour min temp: 70F     
24-hour rainfall: 0.00 in. 
BHO SA 1155 130 SCT 20 165/74/67/2109/002/ 
SCT AC/ACSL OVHD K LAYER ALG HRZN SSE-SSW HAZY WND 16V24/ 
8/040 58001 10075 20070
 
10 A.M.   
Weather: Clear
Temperature: 84F, Dew point: 67F, Wind: SW at 11 kts
Sea-level pressure: 30.00 inches Hg, falling
Visibility: 12 miles, hazy  
BHO SA 1455 130 -SCT 12 158/84/67/2211/000/ 
FEW SML CU FRMG SW-NE SCT AC ALQDS/ 8/110 58007
 
1 P.M.   
Weather: Thin broken altocumulus, few small cumulus
Temperature: 88F, Dew point: 63F, Wind: S at 14G16 kts
Wind: Variable in direction ESE-WSW
Sea-level pressure: 29.95 inches Hg, falling
Visibility: 12 miles, hazy    
6-hourly max. temp: 90F    
BHO SA 1755 90 SCT 250 –BKN 12 145/88/63/1814G16/995/ 
FEW SML CU SW-NE THN BKN AC ALQDS CLR DSNT NE-SE HAZY 
WND 12v24/ 8/110 56013 10090 20075
 
WEATHER SUMMARY FOR THURSDAY, JULY 26
 
TEMPERATURE (DEGREES F)
MAX.....91    NORMAL.....82 
MIN.....65    NORMAL.....63
MEAN....78    NORMAL.....72
DEPARTURE FROM 30-YEAR NORMAL........+6
TOTAL DEPARTURE FOR THE MONTH........-8  (-0.3 DEGREES/DAY)
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..............22   S AT 5:14 P.M.       
                   AEROVANE...............19   S AT 5:14 P.M.       
                   ASOS...................N/A  #
                   DAVIS..................23   S AT 4:41 P.M.           
FASTEST MILE FOR YESTERDAY................15   S AT 5:08 P.M.           
MAXIMUM 2-MINUTE ASOS AVERAGE.............N/A  # 
MAXIMUM 2-MINUTE DAVIS AVERAGE............17   S AT 4:43 P.M.            
AVERAGE WIND SPEED AND DIRECTION..........9.8  SW  
                   ASOS...................N/A  #
                   DAVIS..................9.7  SW [215 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....0.00  DEPARTURE.....-0.12
                         ASOS..............0.00 
TOTAL PRECIPITATION FOR THE MONTH..........1.47  DEPARTURE.....-1.78 
                         ASOS..............1.36    
TOTAL PRECIPITATION FOR THE YEAR..........28.45  DEPARTURE.....-0.36
                   ASOS FOR YEAR..........27.77    
 
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 morning low temp. 69 deg; normal low now 63 deg. 
     max. temp. thru 2 p.m. EDT is 87 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 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 INCHES IN 1911
PEAK GUST 62 MPH SW IN 2006

TODAY'S REPORT PREPARED By: Nate Magee and Eli Melaas