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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, APRIL 5, 2005
ALL TIMES EASTERN DAYLIGHT TIME UNLESS OTHERWISE NOTED

TODAY'S DISCUSSION.....AT 2 P.M.

TEMPERATURE REACHES 60 DEGREES FOR ONLY 2ND TIME THIS YEAR TO DATE!

Clear and very sunny skies have combined with a mild westerly flow
to bring us our warmest temperature since 61 degrees back on January 14.
The air is very dry with the dewpoint dropping to the lower 20's and the
relative humidity has also dropped to the low 20% range.
Visibility today is up to 80 to 90 miles.

TODAY'S OBSERVATIONS

4/5/2005 TUE

8 a.m. clear with 80 miles visibility and 39 deg; dewpoint 30;
wind w at 13 mph; six hourly min. temp. 34 deg.

BHO SA 1155 CLR 80 146/39/30/2811/996/ FEW ACSL DSNT NNW-N CI N-E-S/
8/041 53025 10039 20034

11 a.m. clear with 90 miles visibility and 51 deg; dewpoint 28;
wind west at 13 gusting 20 mph

BHO SA 1455 CLR 90 158/51/28/2811G17/000/ FEW CI DSNT ESE WND 25V32/ 8/001 51012

2 p.m. clear with 80 miles visibility and 59 deg; dewpoint 21; rh 22%;
wind west 17 gusting 31 mph; six hourly max. temp. 59 deg.

BHO SA 1755 CLR 80 163/59/21/2815G27/001/ FEW CI DSNT E-S-SW
THN HZ LYR ALF WND 2827/49/ WND 26V32/ 8/001 51005 10059 20039

WEATHER SUMMARY FOR MONDAY APRIL 04:

TEMPERATURE (DEGREES F)
MAX.....52    NORMAL.....51   HAZEN 52.0 @  1:30 p.m.
MIN.....37    NORMAL.....33   HAZEN 36.6 @ 11:58 p.m. (standard time)
MEAN....45    NORMAL.....42

DEPARTURE FROM 30-YEAR NORMAL...... + 3
TOTAL DEPARTURE FOR THE MONTH......+ 16 (+3.8 DEGREES/DAY)

PRECIPITATION (INCHES) THROUGH THIS MORNING
TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....TRACE   DEPARTURE....-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.69    DEPARTURE....+1.09
                         ASOS..............1.69
TOTAL PRECIPITATION FOR THE YEAR..........18.15    DEPARTURE....+4.09
TOTAL FOR ASOS FOR THE YEAR...............17.18

SNOWFALL (INCHES) THROUGH THIS MORNING
TOTAL SNOWFALL 24 HRS ENDING 8 A.M........  0.0   DEPARTURE....- 0.1
TOTAL SNOWFALL FOR THE MONTH..............  0.0   DEPARTURE....- 0.5
TOTAL SNOWFALL FOR THE SEASON.............119.2   DEPARTURE....+61.5
TOTAL SNOW ON THE GROUND..................NONE

YESTERDAY'S PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY........32  W  AT  7:50 P.M.
                   AEROVANE.........32  W  AT  7:50 P.M.
                   ASOS.............28  W  AT  7:50 P.M.
                   DAVIS............30  W  AT  6:11 P.M.
FASTEST MILE FOR YESTERDAY......... 23  W  AT  4:32 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE.......23  W  AT  4:32 P.M.
MAXIMUM 1-MINUTE DAVIS AVERAGE......24  W  AT  6:29 P.M.
OUR AVERAGE SPEED AND DIRECTION.....13.1 WSW
ASOS AVERAGE AND DIRECTION..........13.1  W  [260 deg]
DAVIS AVERAGE AND DIRECTION.........13.4  W  [260 deg]

THE PRELIMINARY CLIMATE SUMMARY FOR APRIL 2005......
CALENDAR DAY DATA DATA REPORTED HERE ENDING MIDNIGHT STANDARD TIME
DATE  MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available

4/1   56/36/46/+5/0.01/0/.../..           23 MPH SE
4/2   56/35/46/+4/N/A/0/000/00            53 MPH SE
4/3   53/39/46/+4/N/A/0/.../..            54 MPH SE  Aero 55 MPH SE
4/4   52/37/45/+3/0.01/0/131/17           32 MPH W

4/5   morning low temp. 34 deg...

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

Daily PEAK GUST records are for the period 1940-2004. Temperature and
precipitation records are for the full period of record 1885-2004.
All estimated gusts are marked with an 'e'.

RECORDS FOR APRIL 5
HIGH 81 IN 1928
LOW 15 IN 1995
PRECIP 2.15 IN. IN 1987
SNOWFALL 4.0 IN. IN 1898
PEAK GUST 76 MPH WNW IN 1963

RECORDS FOR APRIL 6
HIGH 82 IN 1921
LOW 16 IN 1982
PRE 1.72 INS IN 1886
SNOW 12.3 INS IN 1982
WIND 71e MPH WNW IN 1940

TODAY'S REPORT BY: Robert Skilling