BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JULY 29, 2008     
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED 
 
A VERY NICE LATE JULY DAY
SUNNY AND WARM WITH SLIGHTLY LOWER HUMIDITY
 
A mostly sunny and warm day today with slightly lower
humidity than yesterday and temperatures just a few 
degrees warmer than normal.  Visibility is much better
than yesterday and was up to 25 to 45 miles by early this
afternoon.
 
Today's observations:
 
8 A.M. EDT
Weather: Clear, few altocumulus northeast to southeast 
Temperature: 71F, Dew point: 63F,  Wind: W at 9 kts 
Sea-level pressure: 29.86 inches Hg, rising
Visibility: 9 miles, hazy, smoke layer SW-N
6-hourly minimum temperature: 66F 
24-hourly rainfall: 0.00 inches
BHO SA 1155 CLR 9 111/71/63/2609/986/ 
FEW AC/ACSL NE-NE K LYR ALG/ABV HRZN SW-N 
ESTMTD TOP 15 HND HAZY/ 8/040 53004 10071 20066
 
11 A.M. EDT
Weather: Scattered cumulus clouds, light haze  
Temperature: 78F, Dew point: 62F,  Wind: W at 10 kts,
Wind: Variability in direction WSW-NNW,
Gust to 20 kts past hour
Sea-level pressure: 29.86 inches Hg, steady
Visibility: 20 miles, hazy
BHO SA 1455 40 SCT 20 112/78/62/2810/986/ 
HAZY WND 24V33 GST 20 KTS PST HR/ 8/100 50001
 
2 P.M. EDT
Weather: Scattered cumulus, moderate cumulus and cirrus  
Temperature: 82F, Dew point: 62F,  Wind: W at 9 kts.
Wind: Variability WSW to NW 
Sea-level pressure: 29.85 inches Hg, falling
Visibility: 30 miles, 25 NE-SE, 45 WNW, light haze
6-hour max. temp. 83F 
BHO SA 1755 45 SCT 250 SCT 30 107/82/62/2709/985/ 
MDT CU ALQDS LGT HZ VSBY NE-SE 25 WNW 45 WND 24V32/ 
8/201 58005 10083 20071
 

WEATHER SUMMARY FOR MONDAY, JULY 28
 
TEMPERATURE (DEGREES F)
MAX.....83    NORMAL.....82
MIN.....61    NORMAL.....63
MEAN....72    NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL............. 0 
TOTAL DEPARTURE FOR THE MONTH............+72 [+2.4 DEGREES/DAY]
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............23 WSW AT  4:27 P.M. *   
                   AEROVANE.............21 WSW AT  4:27 P.M. *    
                   ASOS.................22 WSW AT  4:28 P.M.    
                   DAVIS................24 S   AT  1:49 P.M.       
FASTEST MILE FOR YESTERDAY..............14 W   AT  3:57 P.M. *     
MAXIMUM 2-MINUTE ASOS AVERAGE...........15 WSW AT  4:50 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE..........18 SSW AT  1:38 A.M.    
                   AVERAGE............ 9.9 SSW 
                   ASOS................9.7      
                   DAVIS..............10.7 SW [220 deg] 
* Last of several occurrences. 
 
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..........5.85   DEPARTURE......+2.47  
                         ASOS..............5.96   
TOTAL PRECIPITATION FOR THE YEAR..........30.85   DEPARTURE......+1.80   
                         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 83/61/72/0/0/.../..         23 WSW
 
7/29 our morning low temp. 66F; the normal low is 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 29
HIGH 97F IN 1949
LOW 53F IN 1888,1914
PRECIP 1.53 INCHES IN 1901
PEAK GUST 40e MPH E IN 1941
 
RECORDS FOR JULY 30
HIGH 99F IN 1949
LOW 51F IN 1956
PRECIP 1.84 INCHES IN 1976
PEAK GUST 70e MPH SW 1944
 
TODAY'S REPORT PREPARED By: Robert Skilling