BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, JULY 28, 2008     
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED 
 
JULY RAINFALL TOTAL NOW ALMOST 6 INCHES AFTER A NINTH
DAY OF THUNDERSTORM ACTIVITY THIS MONTH YESTERDAY
 
After a quiet weather day on Saturday, thunderstorms 
arrived again for the 9th day this month starting early
Sunday morning and then again during the late afternoon
and early evening. An squall line,  which moved over us
during the late afternoon brought peak wind gusts to 43 
mph WSW at 4:40 p.m. and also included a fastest mile of 
33 MPH WSW at 4:39 p.m.
 
Rainfall of 0.23 inch from the early morning thunderstorm 
combined with another 0.43 inch during the afternoon storms 
to push the July total up to 5.85 inches.
 
While the rainfall and thunder generally ended between 
7 and 9 p.m. EDT last evening, distant thunder could 
still be heard rumbling in the clouds to the southeast
from our Hingham weather station as late as 10:30 p.m.
 
Today's observations:
 
8 A.M. EDT
Weather: Scattered stratus, light fog  
Temperature: 65F, Dew point: 64F,  Wind: SSW at 6 kts 
Sea-level pressure: 29.86 inches Hg, rising
Visibility: 5 miles, 4 miles east thru south  
6-hourly minimum temperature: 61F 
24-hourly rainfall: 0.43 inches
BHO SA 1155 3 SCT 5F 112/65/64/2006/986/ VSBY E-S 4/
8/600 51012 MANUAL 70043 ASOS 70041 10065 20061
 
11 A.M. EDT
Weather: Clear, hazy  
Temperature: 75F, Dew point: 65F,  Wind: SSW at 9 kts,
Wind: Variability in direction S-WSW
Sea-level pressure: 29.88 inches Hg, rising
Visibility: 15 miles, WNW 20, hazy
BHO SA 1455 CLR 15 117/75/65/2009/988/ 
HAZY VSBY WNW 20 WND 17V24/ 53005 
 
2 P.M. EDT
Weather: Clear, few cumulus fractus, cumulus, altocumulus, 
and cirrus, hazy  
Temperature: 80F, Dew point: 63F,  Wind: SW at 9 kts.
Wind: Variability S to W 
Sea-level pressure: 29.85 inches Hg, falling
Visibility: 15 miles, hazy
6-hour max. temp. 81F 
BHO SA 1755 CLR 15 108/80/63/2209/985/ FEW CUFRA/CU/AC/CI 
HAZY WND 18V28/ 8/141 58009 10081 20065
 
WEATHER SUMMARY FOR SUNDAY, JULY 27
 
TEMPERATURE (DEGREES F)
MAX.....79    NORMAL.....82
MIN.....61    NORMAL.....63
MEAN....70    NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL.............-2 
TOTAL DEPARTURE FOR THE MONTH............+72 [+2.5 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............43 WSW AT  4:40 P.M.    
                   AEROVANE.............44 WSW AT  4:40 P.M.    
                   ASOS.................43 WSW AT  4:41 P.M.    
                   DAVIS................45 W   AT  4:40 P.M.      
FASTEST MILE FOR YESTERDAY..............33 WSW AT  4:39 P.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE...........31 WSW AT  4:42 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE..........32 WSW AT  4:42 P.M.   
                   AVERAGE............13.1 S   
                   ASOS...............12.7     
                   DAVIS..............12.4 S [190 deg] 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.43   DEPARTURE......+0.31  
                         ASOS..............0.41
TOTAL PRECIPITATION FOR THE MONTH..........5.85   DEPARTURE......+2.59  
                         ASOS..............5.96   
TOTAL PRECIPITATION FOR THE YEAR..........30.85   DEPARTURE......+1.92   
                         ASOS.............33.34 #
# Includes erroneous ASOS precipitation data on 2/13/08.
 
PRELIMINARY CLIMATE SUMMARY FOR JULY 2008 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system gust when significant
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
7/1  83/66/75/+5/0.15/411/45     28 SSW   TSTM
7/2  84/61/73/+3/1.02/593/65     44 W     TSTM Small hail
7/3  85/63/74/+4/T/793/87        45 SW    Aero 44 MPH SW
7/4  69/59/64/-6/0.22/018/02     25 NE
7/5  70/62/66/-5/0.01/000/00     17 E
7/6  81/65/73/+2/0/245/27        20 S
7/7  86/67/77/+6/0/563/62        21 S
7/8  89/69/79/+8/0/753/83        30 SSE  
7/9  88/70/79/+8/T/734/81        36 SSW   TSTM Aero 35 MPH SSW
7/10 82/65/74/+3/T/887/98        28 W     Aero 29 MPH W
7/11 83/61/72/0/0/759/84         17 NW   
7/12 82/65/74/+2/0/631/70        28 S  
7/13 81/66/74/+2/0/784/87        38 S     Aero 40 MPH S  
7/14 80/67/74/+2/0.36/468/52     23 W     TSTM 
7/15 87/67/77/+5/0/799/89        22 SSW
7/16 88/66/77/+5/0/869/97        22 SSE
7/17 86/68/77/+5/0/805/90        20 SW   
7/18 91/66/79/+7/0.03/679/76     23 SE    TSTM
7/19 93/66/80/+8/T/589/66        35 WSW   Aero 35 WSW
7/20 88/71/80/+8/0.18/178/20     27 NNW   TSTM  
7/21 84/65/74/+3/0.07/480/54     25 NNE 
7/22 78/63/71/-1/0.13/496/56     21 WSW
7/23 70/63/67/-5/0.75/0/0        28 NE    TSTM 
7/24 81/67/74/+1/2.27/044/05     43 S     TSTM Aero 47 MPH S
7/25 82/65/74/+1/0/670/76        23 SSE
7/26 85/65/75/+3/0/800/91        30 S 
7/27 78/61/70/-2/0.66/149/17     43 WSW   Aero 44 MPH WSW TSTM
 
7/28 morning low temp. 61F; our normal low is now 63F
   
NEW DAILY RECORDS FOR JULY
 
7/24 - PEAK GUST OF 43 MPH FROM THE SOUTH IS NEW REOCRD FOR THE
       DATE; PREVIOUS RECORD 41 MPH S IN 1975, 41e MPH WSW IN 1977
7/24 - DAILY PRECIPITATION 2.27 INCHES IS NEW RECORD FOR THE DATE;
       PREVIOUS RECORD WAS 2.21 INCHES IN 1988
 
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: Robert Skilling