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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY APRIL 12 2004
ALL TIMES ARE EASTERN DAYLIGHT TIME
[unless otherwise noted]

TODAY'S DISCUSSION....2:00 P.M.

High cloudiness is thickening early this afternoon and a chill northeast
wind is holding high temperatures between 45 and 47 degrees.  April
continues to average than normal and by about 2 degrees through yesterday.
There's been no measurable rainfall now for six consecutive days.

By: Robert Skilling

TODAY'S SCHEDULED OBSERVATIONS....

4/12/2004 MONDAY

8 a.m. scattered low clouds and high thin overcast and visibility of 12 miles
with thin fog; temp. 38; dewpoint 34; wind nne at 12 mph...
six hour minimum temp. 36 deg...

BHO SA 1155 6 SCT 150 SCT 220 SCT 250 -OVC 12 253/38/34/0210/028/
BINOVC E AC LYR E-S FEW CC THN F ALQDS WND 34V05 8/671 53018 10038 20036

11 a.m. high thin overcast with 45 miles visibility and 45 deg; dewpoint
30 deg; wind ene at 17 gusting 24 mph...

BHO SA 1455 250 -BKN 300 -OVC 45 262/45/30/0615G21/030/
FEW SC DSNT ESE-SE FEW AC/ACSL BINOVC S WND 02V09/ 8/541 51009

METAR KBHO 1455 06015G21KT 45SM FEW12 FEW150 BKN250 OVC300 07/M01
A3030 SLP262 250/300 LYRS THN WND 02V09/ 8/041 51009

2 p.m. high overcast with thin spots and visibility of 50 miles;
temp. 45; dewpoint 29; rh 53%; wind ene at 16 gusting 24 mph...
six hourly maximum temp. 47 deg.

BHO SA 1755 E250 BKN 300 OVC 50 256/45/29/0614G21/029/
FEW LWR CC OVC PTLY THN OVHD-N-E-SE BINOVC SE WND 01V08/ 8/007 58006 10047 20038

ALL TIMES ARE EASTERN DAYLIGHT TIME
[unless otherwise noted]

OUR WEATHER SUMMARY FOR SUNDAY APRIL 11 EASTER DAY

TEMPERATURE (DEGREES F)
MAX.....51    NORMAL.....54     HAZEN SHELTER: 50.7 @ N/A
MIN.... 36    NORMAL.....36     HAZEN SHELTER: 36.1 @ N/A
MEAN....44    NORMAL.....45
DEPARTURE FROM 30-YEAR NORMAL....- 1
TOTAL DEPARTURE APRIL TO DATE....- 28

THE APRIL TEMPERATURE DEPARTURE IS 1.8 COLDER THAN NORMAL

ASOS MAX/MIN FOR 4/11: 50/36 /// TIMES: 4:26 P.M. AND 6:38 A.M.

HEATING DEGREE DAYS
TOTAL HEATING DEGREE DAYS FOR YESTERDAY.......21   DEPARTURE.....+ 1
TOTAL HEATING DEGREE DAYS FOR APRIL......... 260   DEPARTURE....+ 18
TOTAL HEATING DEGREE DAYS FOR THE SEASON....5752   DEPARTURE.....+46
TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6151   DIFFERENCE...-399

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY........21 W   AT  1:05 A.M.
                   AEROVANE.........22 W (estimated )
                   ASOS.............17 WNW AT 12:59 A.M.
FASTEST MILE FOR YESTERDAY..........N/A
MAXIMUM 2-MINUTE ASOS AVERAGE.......14 ENE AT  6:14 A.M.
AVERAGE WIND SPEED/DIRECTION........ 7.3 N
AVERAGE ASOS WIND FOR YESTERDAY .... 7.6

PRECIPITATION (INCHES) UPDATED APRIL 13
TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.00
                         ASOS..............0.00
TOTAL PRECIPITATION FOR APRIL .............4.08
DEPARTURE FOR APRIL TO DATE...............+2.28
TOTAL ASOS PRECIPITATION FOR APRIL.........3.84

TOTAL PRECIPITATION FOR 2004..............11.75
                             DEPARTURE....-3.38
TOTAL ASOS PRECIPITATION FOR 2004.........10.72

SNOWFALL (INCHES)
TOTAL SNOWFALL FOR 24 HRS ENDING 8 A.M.....0.0
TOTAL SNOWFALL FOR APRIL...................0.5
DEPARTURE FOR APRIL......................- 1.2
OTAL SNOWFALL FOR MARCH....................15.8
TOTAL SNOWFALL THIS SEASON.................58.0   DEPARTURE......+3.9

PRELIMINARY CLIMATE SUMMARY FOR APRIL 2004......CALENDAR DAY DATA
CALENDAR DAY DATA RUNS ON STANDARD TIME THE YEAR ROUND...
APRIL 2004 DAILY CALENDAR DATA...ENDING MIDNIGHT EST...
DATA REPORTED:
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  41/36/39/-2/3.47/0/000/00         44 MPH NE
4/2  37/36/36/-5/0.30/0/000/00         41 MPH NE
4/3  38/35/37/-5/0/0/0/000/00          25 MPH NE
4/4  47/35/41/-1/0.22/0/008/01         32 MPH NW
4/5  40/27/34/-9/0.09/0.5/178/23       45 MPH NW  Aerovane 46 MPH NW
4/6  49/26/38/-5/0/0/747/96            52 MPH WNW Aerovane 56 MPH WNW
4/7  55/32/44/+1/0/0/530/68            31 MPH WSW
4/8  58/32/45/+1/0/0/.../..            25 MPH S
4/9  60/39/50/+6/T/0/.../..            32 MPH W
4/10 57/34/46/+2/0/0/.../..            40 MPH W
4/11 51/36/44/-1/0/0/.../..            21 MPH W
4/12 morning low temp. 36 deg...MAX 47 THRU 2 P.M.

.....THERE ARE TWO NEW DAILY RECORDS FOR APRIL TO DATE...

1. RAINFALL OF 3.47 INCHES for April 01, the old record was 2.28 inches.

2. The GREATEST IN 24 HOURS FOR APRIL IS NOW 3.47 INCHES ON APRIL 01; the
   previous record was 3.19 inches in 1991.

THE DAILY EXTREMES....

RECORDS FOR APRIL 12
HIGH 82 IN 1945
LOW 17 IN 1926
PRECIP 1.51 INCHES IN 1993
SNOWFALL 12.0 INCHES IN 1894
PEAK GUST 65e MPH W IN 1978

RECORDS FOR APRIL 13
HIGH 85 IN 1945
LOW 22 IN 1939
PRECIP 1.95 INCHES IN 1933
SNOWFALL 6.8 INCHES IN 1933
PEAK GUST 59 MPH SSW IN 1995

RECORDS FOR APRIL 14
HIGH 80 IN 1945
LOW 21 IN 1923
PRECIP 2.22 INCHES IN 1895
SNOWFALL 8.4 INCHES IN 1953
PEAK GUST 71e MPH W IN 1943

TODAY'S REPORT BY: Robert Skilling