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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, APRIL 11, 2004
ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted]


Today's observations:

7am
BHO SA 1155 85 SCT 150 -OVC 30 192/39/31/0507/010/ WND BACKING FEW THN SPTS IOVC/ 8/071 53016 10042 20036
METAR KBHO 111155Z 05007KT 30SM SCT85 OVC150 04/M01 A3010 RMK SLP192 8/071 T00381006 10056 20022 53016

10am
BHO SA 1455 50 SCT 120 OVC 40 204/42/31/3607/013/ WND 33V06 SUN DMLY VSBL/ 8/07/ 51012
METAR KBHO 111455Z 36007KT 330V060 40SM SCT50 OVC120 05/M01 A3013 RMK SLP204 8/07/ T00541006 51012

1pm
BHO SA 1755 50 SCT 85 SCT 130 OVC 45 199/47/30/3607/012/ WND 18V06 FEW BINOVC ALQDS/ 8/57/ 58005 10047 20036
METAR KBHO 111755Z 36007KT 180V060 45SM SCT50 SCT85 OVC130 08/M01 A3012 RMK SLP199 8/57/ T00831011 10083 2022 58005


WEATHER SUMMARY FOR SATURDAY, APRIL 10:

TEMPERATURE (DEGREES F)
MAX.....57    NORMAL.....53    ASOS.....57 AT 3:33 P.M.
MIN.....34    NORMAL.....35    ASOS.....33 AT 5:39 A.M.
MEAN....46    NORMAL.....44
DEPARTURE FROM 30-YEAR NORMAL.....+2
TOTAL DEPARTURE FOR THE MONTH....-17  (-1.7 DEGREES/DAY)

HEATING DEGREE DAYS
TOTAL HEATING DEGREE DAYS FOR YESTERDAY.......19   DEPARTURE.....-2
TOTAL HEATING DEGREE DAYS FOR THE MONTH......239   DEPARTURE....+17
TOTAL HEATING DEGREE DAYS FOR THE SEASON....5731   DEPARTURE....+45
TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6094   DIFFERENCE..-382

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY........40 W   AT 1:09 P.M.
                   AEROVANE.........40 W   AT 1:08 P.M.
                   ASOS.............38 WSW AT 1:10 P.M.
FASTEST MILE FOR YESTERDAY..........30 W   AT 1:09 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE.......29 W   AT 1:10 P.M.
AVERAGE WIND SPEED AND DIRECTION..15.4 W
                   ASOS...........15.7

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00   DEPARTURE....-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........4.08   DEPARTURE....+2.43
                         ASOS..............3.84
TOTAL PRECIPITATION FOR THE YEAR..........11.75   DEPARTURE....-3.23
                         ASOS.............10.72

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL FOR 24 HRS ENDING 7 A.M......0.0   DEPARTURE....-0.1
TOTAL SNOWFALL FOR THE MONTH................0.5   DEPARTURE....-1.1
TOTAL SNOWFALL FOR THE SEASON..............58.0   DEPARTURE....+4.0


PRELIMINARY CLIMATE SUMMARY FOR APRIL 2004......CALENDAR DAY DATA
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

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

RECORDS FOR APRIL 11
HIGH      78F IN 1945
LOW       19F IN 1909
PRECIP    1.72 INCHES IN 2003
SNOWFALL  9.5 INCHES IN 1958
PEAK GUST 65 MPH NW IN 1963

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


TODAY'S REPORT BY: Andrew Hoell