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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, DECEMBER 22, 2004
ALL TIMES ARE IN EASTERN STANDARD TIME [unless otherwise noted]

Discussion...1 P.M.

Very mild temperatures returning today with readings reaching the
mid 40's by early afternoon and increasing high cloudiness.


Today's observations:

7 a.m. few high clouds with 20 miles visibility and a smoke layer along
the horizons and 26 deg; dewpoint 16; wind south at 13 mph; six hourly
min temp. 25 deg.

BHO SA 1155 300 -SCT 20 255/26/16/1811/028/ LWR CI ALQDS INVSN PRSNT K LYR 
ALG ALL HRZNS/ 8/001 4/001 51012 10028 20025

10 a.m. high thin scattered clouds with 20 miles visibility with thin haze 
and smoke all directions; temp. 38; dewpoint 26; wind s at 14 mph...

BHO SA 1455 300 -SCT 20 280/38/26/1812/036/ FEW LWR CI ALQDS THN HK ALQDS/ 
8/001 53025

1 p.m. high overcast with 25 miles visibility and hazy; temp. 45; dewpoint 38;
wind south at 18 gusting 27 mph; six hourly max temp. 45 deg...

BHO SA 1755 250 SCT 300 -OVC 25 270/45/38/1816G23/033/ OCNL FEW SC FRMG HAZY/ 
8/507 56010 10045 20026

WEATHER SUMMARY FOR TUESDAY DECEMBER 21:

TEMPERATURE (DEGREES F)
MAX.....30    NORMAL.....37    HAZEN 30.2 @ 6:45 p.m. DAVIS 30.3 @ 7:09 p.m.
MIN.....01    NORMAL.....22    HAZEN  1.2 @ 3:36 a.m. DAVIS  2.0 @ 3:20 a.m.
MEAN....16    NORMAL.....30

DEPARTURE FROM 30-YEAR NORMAL.....-14
TOTAL DEPARTURE FOR THE MONTH.....+21  (+0.8 DEGREES/DAY)

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY........36 SSW AT 1:49 P.M.
                   AEROVANE.........37 SSW AT 1:49 P.M.
                   ASOS.............32 SSW AT 1:49 P.M.
                   DAVIS............36  SW AT 1:48 P.M.

FASTEST MILE FOR YESTERDAY..........28 SSW AT 1:49  P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE.......26 SSW AT 1:49  P.M.
MAXIMUM 1-MINUTE DAVIS AVERAGE......29 SSW AT 1:48  P.M.

AVERAGE WIND SPEED AND DIRECTION....14.5  SW
                   ASOS.............14.9  SSW 210 deg.
                   DAVIS............14.9  SW  230 deg.

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..........3.47   DEPARTURE....+0.41
                         ASOS..............3.48
TOTAL PRECIPITATION FOR THE YEAR..........52.45   DEPARTURE....+2.88
                         ASOS.............50.80

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.....-0.4
TOTAL SNOWFALL FOR THE MONTH................2.2   DEPARTURE.....-4.5
TOTAL SNOWFALL FOR THE SEASON..............10.0   DEPARTURE.....+0.4


PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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

12/1  55/39/47/+11/0.80/0/073/13   62 MPH SE  Aero 65 MPH SSE
12/2  46/36/41/+5/0/0/379/68       50 MPH W   Aero 51 MPH W
12/3  45/32/39/+4/0/0/378/68       33 MPH W
12/4  39/25/32/-3/0/0/500/90       31 MPH SSW
12/5  50/26/38/+3/0/0/532/96       46 MPH W   Aero 51 MPH W
12/6  33/20/27/-7/0.03/0.2/000/00  22 MPH NE
12/7  45/32/39/+5/1.48/0/000/00    37 MPH ENE
12/8  52/34/43/+10/0.04/0/402/73   55 MPH W   Aero 58 MPH W
12/9  41/32/37/+4/0/0/143/26       25 MPH W
12/10 44/37/41/+8/0.77/0/000/00    40 MPH NE
12/11 44/38/41/+9/0.07/0/000/00    35 MPH NNE
12/12 43/33/38/+6/0/0/099/18       32 MPH W
12/13 44/33/39/+7/0.01/0/050/09    30 MPH WSW
12/14 33/17/25/-6/0/0/371/68       33 MPH WNW  Aero 36 MPH WNW
12/15 26/13/20/-11/0/0/534/98      29 MPH NW
12/16 41/16/29/-2/0/0/513/94       32 MPH S    Aero 35 MPH S
12/17 40/23/32/+1/0.01/0.2/398/73  48 MPH W    Aero 48 MPH W
12/18 37/1928/-2/0/0/392/72        21 MPH NW
12/19 41/28/35/+5/T/0/125/23       21 MPH N
12/20 36/02/19/-11/0.26/1.8/011/02 40 MPH WNW  Aero 45 MPH WNW
12/21 30/01/16/-14/0/0/414/76     36 MPH SSW

12/22 morning low temp. 25 degrees..

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

RECORDS FOR DECEMBER 22
HIGH 62 IN 1994
LOW -05 IN 1921
PRECIP 1.52 INS. IN 1975
SNOWFALL 8.8 INS. IN 1975
PEAK GUST 62 MPH WNW IN 1998

RECORDS FOR DECEMBER 23
HIGH 62 IN 1990
LOW -01 IN 1989
PRECIP 1.70 INS. IN 1947
SNOWFALL 11.9 INS. IN 1947
PEAK GUST 63 NE IN 1994

TODAY'S REPORT BY: Robert Skilling