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

DAILY CLIMATE SUMMARY
THURSDAY, JULY 1, 2004
ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted]

Thunderstorms popped up very suddenly early this afternoon and a
light shower included some small hail around 1 p.m. with 0.03 inch
of rain.  A high of 82 degrees occurred at 12:38 p.m. just before the
shower began at 12:51 p.m.

TODAY'S OBS...

7/1/2004 THU

8 a.m.  clear with a few altocumulus sw with 5 miles visibility in haze; temp. 67;
dewpoint 61; wind ssw at 07 mph; six hourly min. temp. 62 deg.

BHO SA 1155 CLR 5H 218/67/61/2007/017/ FEW AC SW/ 8/080 50005 10067 20062

11 a.m. clear and hazy with 20 miles visibility and 15 miles ne-se; temp. 79;
dewpoint 59; wind ssw at 10 mph

BHO SA 1455 CLR 20 217/79/59/2109/017/ HAZY VSBY NE-SE 15/ 58001

2 p.m. mostly cloudy thunderstorm east occasional lightning cloud to
ground east visbility 20 miles but 6 miles east; temp. 78/dewpoint 60;
wind ssw at 15 mph; six hourly max temp. 82; six hourly precip. 0.03 in.
and trace of small hail

BHO SA 1755 E45 BKN 200 BKN 20 203/78/60/2113/013/ TB50 E MOVG E OCNL LTGCG
TB1656TE31B50 MOVG E CB E MOVG E CB W AND NW-N MOVG E-NE TCU ALQDS VSBY E 6
RB1651E03AB56E58 HAILSTO 1/8 IN/ 8/903 58013 ASOS 60003 MANUAL 6003/ 10082 20067

WEATHER SUMMARY FOR WEDNESDAY JUNE 30:
TIMES: EASTERN DAYLIGHT TIME

TEMPERATURE (DEGREES F)
MAX.....80    NORMAL.....79    Hazen shelter: 80.0... @  2:46 p.m.
MIN.....59    NORMAL.....60    Hazen shelter: 59.0... @  5:10 a.m.
MEAN....70    NORMAL.....69

DEPARTURE FROM 30-YEAR NORMAL...... + 1
TOTAL DEPARTURE FOR THE MONTH...... - 20

JUNE AVERAGED 1.0 DEGREE COOLER THAN NORMAL

HEATING DEGREE DAYS
TOTAL HEATING DEGREE DAYS FOR YESTERDAY....... 0   DEPARTURE..... -1
TOTAL HEATING DEGREE DAYS FOR THE MONTH...... 78   DEPARTURE.... +4
TOTAL HEATING DEGREE DAYS FOR THE SEASON....6291   DEPARTURE.....-80
TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6890   DIFFERENCE...-599

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY........29 W  AT  4:22 p.m.
                   AEROVANE.........30 W  AT  4:21 p.m.
                   ASOS.............26 W  AT  4:23 p.m.
                   DAVIS............29 W  AT  4:22 p.m.
MAXIMUM 2-MINUTE ASOS AVERAGE.......22 W  AT  4:24 p.m.
OUR FASTEST MILE FOR YESTERDAY......24 W  AT  4:22 p.m.


OUR AVERAGE WIND SPEED/DIRECTION....  11.4  W
ASOS AVERAGE WIND SPEED.............  13.1  W  [260 deg ]
DAVIS AVERAGE WIND SPEED/DIRECTION..  11.9  W  [270 deg ]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT)
TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.00   DEPARTURE...-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.95   DEPARTURE....-1.98
                         ASOS..............1.95
TOTAL PRECIPITATION FOR THE YEAR..........22.87   DEPARTURE....-2.80
                         ASOS.............21.32

PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

6/1  51/46/49/-13/0.32/000/00        28 MPH E
6/2  74/46/60/-2/0.08/254/28         31 MPH WNW TSTM
6/3  72/50/61/-1/0.21/463/51         40 MPH NW  TSTM  *Aerovane 46 MPH NW
6/4  72/47/60/-3/0/835/92            21 MPH S
6/5  69/50/60/-3/0/501/55            35 MPH E
6/6  55/48/52/-11/0.32/000/00        31 MPH NE
6/7  73/48/61/-3/T/428/47            21 MPH S
6/8  87/57/72/+8/0/793/87            29 MPH SSW
6/9  90/67/79/+15/0.23/813/89        29 MPH SW   TSTM
6/10 69/54/62/-2/0.05/146/16         32 MPH NE
6/11 70/49/60/-5/0/887/97/           27 MPH NW
6/12 71/49/60/-5/0/897/98            23 MPH S
6/13 74/51/63/-2/0/805/88            31 MPH S
6/14 69/54/62/-3/0/T/027/03               32 MPH S
6/15 86/62/74/+8/0/669/73            30 MPH W
6/16 85/66/76/+10/0/824/90           20 MPH NW
6/17 85/63/74/+8/0/0.01/110/12       20 MPH ENE
6/18 65/60/63/-3/0/0.01/000/00       23 MPH ENE
6/19 80/58/69/+6/0.06/459/50         36 MPH W
6/20 71/51/61/-6/0/907/99            30 MPH NW
6/21 76/52/64/-3/0/899/98            31 MPH WSW
6/22 74/58/66/-1/T/110/12                 30 MPH S
6/23 82/63/73/+5/0/789/86            25 MPH WNW  NEW ASOS WEIGHING GAGE INSTALLED
6/24 80/59/70/+2/0/0/889/97          28 MPH S
6/25 77/59/68/0/0.32/256/28          26 MPH S   TSTM [corrected to add TSTM ]
6/26 75/56/66/-2/0.26/147/16         30 MPH WNW
6/27 75/52/64/-5/0/869/95            31 MPH WSW
6/28 75/55/65/-4/0/412/45            29 MPH W
6/29 74/57/66/-3/0.08/558/61         23 MPH W
6/30 80/59/70/+1/0/813/89                 29 MPH W

7/1 ...MORNING LOW 62; NORM. LOW 60

During June to date there has been one daily record established so far for the month...
The low maximum temp. of 51 degrees on the 1st edged out the previous low
maximum for the date of 52 degrees in 1922 and 1984.

* gust not associated with TSTM...but rather a rain/wind squall...

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

RECORDS FOR JULY 01
HIGH 98F IN 1964
LOW 44F IN 1988 [RECORD FOR MONTH]
PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH]
PEAK GUST 52 MPH WNW IN 1974

RECORDS FOR JULY 02
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.42 INS IN 1986
PEAK GUST 45 MPH SW IN 1999

TODAY'S REPORT BY:  Robert Skilling/Kim Jeffs