BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY CLIMATE SUMMARY
SUNDAY, JULY 18, 2004
ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted]

TODAY'S MANUAL OBSERVATIONS....

7AM
BHO SA 1155 160 SCT 2F 150/69/66/2204/997/ VSBY INCRSNG WND LGT/ 
8/050 51009 10069 20066

10AM
BHO SA 1455 300 -OVC 5H 158/77/67/1804/000/ WND LGT/ 8/001 51008

1PM
BHO SA 1755 35 SCT 200 OVC 8 149/80/63/1708/997/ FEW TCU ALQDS 
WND 09V25 WND LGT HAZY/ 8/907 56009 10083 20069


WEATHER SUMMARY FOR SATURDAY, JULY 17:

TEMPERATURE (DEGREES F)
MAX.....84    NORMAL.....82    ASOS MAXIMUM: 84F @   3:36 p.m.
MIN.....63    NORMAL.....62    ASOS MINIMUM: 63F @   4:52 a.m.
MEAN....74    NORMAL.....72

DEPARTURE FROM 30-YEAR NORMAL.........+ 2
TOTAL DEPARTURE FOR THE MONTH.........-38 (-2.2 DEGREES/DAY)


PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY.........23 WSW    AT  12:19 a.m.
                   AEROVANE..........22 WSW    AT  12:15 a.m.
                   ASOS..............22 WSW    AT  12:19 a.m.
                   ASOS 2-MINUTE.....17 WSW    AT  12:24 a.m.
                   FASTEST MILE......16 WSW    AT  12:16 a.m.
                   OUR AVERAGE.......9.4  MPH WSW
                   ASOS AVERAGE......10.0 MPH WSW


PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT)
TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.00   DEPARTURE....-0.12
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.07   DEPARTURE....+1.01
                         ASOS..............3.10
TOTAL PRECIPITATION FOR THE YEAR..........25.94   DEPARTURE....-1.79
                         ASOS.............24.36


PRELIMINARY CLIMATE SUMMARY FOR JULY 2004......CALENDAR DAY DATA
DATA REPORTED: 24 HOUR PERIODS ENDING MIDNIGHT EST
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  82/62//72/+2/0.06/T/503/55       29 MPH S TSTM trace/sml hail
7/2  83/59/71/+1/0.93/T/575/63        45 MPH W TSTM  trace of hail *
7/3  80/59/70/0/0/894/98              21 MPH NNW
7/4  81/59/70/0/0/817/90              23 MPH SSE
7/5  69/63/66/-5/1.29/000/00       33 MPH S
7/6  79/65/72/+1/T/364/40                  22 MPH NW
7/7  78/63/71/0/0/690/76                   23 MPH SSE
7/8  75/62/69/-2/0.01/045/05/         24 MPH S
7/9  75/62/69/-2/0/535/59             25 MPH S
7/10 80/59/70/-1/0/842/93             21 MPH NW
7/11 74/60/67/-5/0/713/79             20 MPH N
7/12 76/59/68/-4/0/189/21             24 MPH S
7/13 64/60/62/-10/0.51/000/00         28 MPH ENE
7/14 63/59/61/-11/0.18/000/00         27 MPH NNE
7/15 77/60/69/-3/0/.../..             29 MPH S     AERO 33 MPH S
7/16 79/62/71/-1/0/.../..             30 MPH SW    AERO 33 MPH SSW
7/17 84/63/74/+2/0/.../..             23 MPH WSW


VERY HEAVY RAINFALL EVENT ON JULY 2ND.....
7/2.. * short period rainfall 0.41 in 3 mins.; 0.50 in 5 mins.;
0.80 in 10 mins. 0.86 in 15 mins....

DAILY EXTREMES

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

RECORDS FOR JULY 18
HIGH   96F IN 1991, 1999
LOW    54F IN 1892, 1956, 1971
PRECIP 1.65 INCHES IN 2000
WIND   43e MPH SW IN 1949

RECORDS FOR JULY 19
HIGH   96F IN 1977, 1991
LOW    50F IN 1890
PRE    1.10 INCHES IN 1951
WIND   63 MPH SSW IN 1982

TODAY'S REPORT BY:  Andrew Hoell