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

DAILY CLIMATE SUMMARY
TUESDAY, MAY 10, 2005
ALL TIMES EASTERN DAYLIGHT TIME UNLESS OTHERWISE NOTED

TODAY'S DISCUSSION....

Skies finally cleared by early this afternoon and temperatures
are rising through the lower 60's...
The month of May is averaging 6 degrees cooler than normal to date...

TODAY'S OBSERVATIONS

5/10/2005 TUE

BHO SA 1155 E18 OVC 25 200/52/48/3104/012/ FEW LWR CU DSNT SE-S
BINOVC DSNT S-SW THN SPTS IOVC ALQDS HAZY/ 8/8// 53010 10052 20046

BHO SA 1455 E20 OVC 40 203/56/46/0608/013/ BRGHT SPTS IOVC/ 8/5// 53004

BHO SA 1755 300 -SCT 40 191/63/47/1106/009/ FEW SML CU DSNT SE-SW
K LYR ALF NW-E VSBY WNW 45 WND L/V/ 8/101 58012 10063 20052

WEATHER SUMMARY FOR MONDAY MAY 09:

TEMPERATURE (DEGREES F)
MAX.....52    NORMAL.....65   HAZEN 51.9 @  4:20 p.m.
MIN.....43    NORMAL.....45   HAZEN 43.2 @  3:58 a.m.
MEAN....48    NORMAL.....55

DEPARTURE FROM 30-YEAR NORMAL...... -   7
TOTAL DEPARTURE FOR MAY.............-  50 [for the month, -5.8 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING
TOTAL PRECIPITATION 24 HRS ENDING 8 A.M.....trace   DEPARTURE....-0.12
TOTAL PRECIPITATION FOR MAY.................1.72    DEPARTURE....+0.59
PRECIPITATION FOR ASOS 24 HRS ENDING 8 A.M..0.00
ASOS FOR THE MONTH OF MAY........... .......1.67
TOTAL PRECIPITATION FOR THE YEAR........  .22.81    DEPARTURE....+3.88
TOTAL FOR ASOS FOR THE YEAR.............. .21.70


TOTAL SNOWFALL FOR APRIL .................  0.2   DEPARTURE....- 2.9
TOTAL SNOWFALL FOR THE SEASON.............119.4   DEPARTURE.....+59.4

YESTERDAY'S PEAK GUSTS AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY........36    N AT  2:41 A.M.
                   AEROVANE.........36    N AT  2:41 A.M.
                   ASOS.............30    N AT  2:41 A.M.
                   DAVIS............30  NNW AT  2:41 A.M.

FASTEST MILE FOR YESTERDAY......... 23    N AT  2:43 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE.......22    N AT  1:02 A.M.
MAXIMUM 1-MINUTE DAVIS AVERAGE......22    N AT  1:02 A.M.

YESTERDAY'S AVERAGE WIND SPEEDS.....
OUR AVERAGE SPEED AND DIRECTION.....11.3   N
ASOS AVERAGE AND DIRECTION..........11.1  NE [040 deg] ??
DAVIS AVERAGE AND DIRECTION.........11.2   N [010 deg]

THE PRELIMINARY CLIMATE SUMMARY FOR MAY 2005......
CALENDAR DAY DATA DATA REPORTED HERE ENDING MIDNIGHT STANDARD TIME
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

5/1  57/44/51/-1/0.14/118/14              33 MPH WNW
5/2  63/39/51/-1/0.05/593/70              43 MPH S
5/3  58/38/48/-5/0/.../..                 30 MPH WSW
5/4  59/40/50/-3/T/.../..                 21 MPH E
5/5  60/38/49/-4/0/.../..                 23 MPH E
5/6  54/42/48/-6/0.08/.../..              26 MPH NNE
5/7  44/39/42/-12/..../000/00             58 MPH N
5/8  47/39/43/-11/..../000/00             43 MPH NNW
5/9  52/43/48/-7/..../.../..              36 MPH N

5/10 morning low temp. 46 deg. [46.2 at 1:58 a.m. ]

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

RECORDS FOR MAY 10
HIGH 93F IN 1896
LOW 29F IN 1900
PRE 1.85 INS IN 1998
SNOW 2.8 INS 1977 (7.8 INS TOTAL 5/9-5/10 1977)
PEAK GUST 64 MPH S IN 1990

RECORDS FOR MAY 11
HIGH 90F IN 1993
LOW 28F IN 1900
PRE 1.28 INS IN 1957
SNOW 1.0 INS IN 1907 (LATEST MEASURABLE SNOW ON RECORD)
PEAK GUST 75e MPH NW IN 1945

Today's report by: Robert Skilling