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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
TUESDAY SEPTEMBER 24 2002

DISCUSSION FOR 9/24/2002....2 p.m.

Below is the table of excessive rainfall as recorded here night before last...
The column on the left is ASOS data while one on the right includes the
corrected values for the standard gage which received 0.10 more rainfall than
the ASOS tipping bucket. Totals were 1.47/1.37 inches respectively.

EXCESSIVE PRECIP 9/22-23/2002

9/22
5   0.34  2358E 9/22 0.37
10  0.56  0000E 9/23 0.61
15  0.64  0000E      0.70
20  0.74  0000E      0.81

9/23
30  0.80  0009E      0.87
45  0.94  0025E      1.02
60  0.98  0025E      1.07
80  1.00  0025E      1.09
100 1.01  0025E      1.10
120 1.01  0122E      1.10
150 1.04  0122E      1.13
180 1.04  0122E      1.13

THE OBSERVATIONS FOR YESTERDAY AND TODAY...

9/23/2002 MON

8 A.M.
BHO SA 1155 W3 X 1/16F 156/69/69/2010/999/ RE UKN 8///// 51012 60032 70134 
10070 20068

11 A.M.
BHO SA 1455 100 SCT 120 SCT E220 BKN 250 OVC 10 169/70/69/2906/003/
FEW STRA DRFTG ABV/BLO SMT FEW SC NNE DENSE CI SW-NW OVC PTLY THN OVHD-SW-N
VSBY E-S 8 WNW 20/ 8/682/ 51013 6004/

9/24/2002 TUE

8 A.M.
BHO SA 1155 E20 OVC 60 231/58/50/0212G18/021/ BINOVC ALG DSNT W-NW HRZN
VSBY NW 80/ 8/5/// 51009 70004 10062 20058

11 A.M.
BHO SA 1455 E16 OVC 55 239/61/53/0310/024/ SUN BRFLY DMLY VSB PST HR/ 
8/5/// 51008

2 P.M.
BHO SA 1755 E18 OVC 40 235/62/0408/022/ VSBY SE 25 WNW 45/ 8/5/// 56004 
10063 20058

THE DATA RECORDED FOR MONDAY SEPTEMBER 23
TEMPERATURES ARE CALENDAR DAY MIDNIGHT TO MIDNIGHT
EASTERN STANDARD TIME

MAX:      75     MIN:      63
ASOS MAX: 75     ASOS MIN: 63
MEAN:     69 [+ 9]
NORMAL HIGH/LOW/MEAN: 69/51/60

SEPTEMBER DEPARTURE TO DATE: +116 deg.

SEPTEMBER AVERAGE NOW: 5 DEGREES WARMER THAN NORMAL

PRECIPITATION FOR 09/24 AS OF 8 A.M. EDT

24 HRS ENDING 8 A.M.......0.04 INS.
2-DAY TOTAL ENDING 8 A.M. 1.47 INS.
ASOS......................0.04 INS.
2-DAY ASOS TOTAL..........1.37 INS.
SEPTEMBER TOTAL TO DATE...4.20 INS.
DEPARTURE FROM NORMAL....+1.05 INS.
SEPTEMBER ASOS TOTAL......N/A

PRECIP. TOTAL YEAR 2002...34.76 INS.
DEPARTURE FROM NORMAL.....-1.86 INS.
ASOS TOTAL FOR 2002.......N/A

WIND DATA FOR MONDAY SEPTEMBER 23, 2002

PEAK GUST ASOS:   31 MPH S AT 3:47 A.M. EDT
PEAK GUST 420C:   31 MPH S AT 3:47 A.M. EDT
PEAK GUST AERO:   33 MPH S AT 3:47 A.M. EDT

SEPT. 2002 PRELIMINARY DATA....ALL IS CALENDAR DAY DATA....
BELOW IS ORDER OF DATA REPORTED....
MAX/MIN/MEAN/DEP/PRECIP/SUNSHINE/ OFFICIAL 420C WIND GUST
Aero = Aerovane recording wind system gust when significantly higher
... data as yet not available
TSTM = thunderstorm day
ASOS TWO MINUTE MAXIMUM WIND ON THE RIGHT...
ASOS IS AUTOMATED SURFACE OBSERVING SYSTEM

9/1  66/52/59/-8/0.01/46/06/   18 ENE ASOS 2 MIN MAX = 15 ENE
9/2  63/59/61/-5/0.87/000/00/  28 NNE ASOS 2 MIN MAX = 20 NE
9/3  68/63/66/0/0.30/000/00/   25 NE  ASOS 2 MIN MAX = 17 NE
9/4  83/64/74/+8/0.12/406/52/  22 NW/ ASOS 2 MIN MAX = 17 NW/ TSTM
9/5  73/56/65/-1/0/724/93/     28 NW  ASOS 2 MIN MAX = 22 NW
9/6  77/52/65/0/0/767/99/      21 NNW   "  2 MIN MAX = 16 NW
9/7  83/61/72/+8/0/757/98/     17 SW    "     "      = 14 SW
9/8  87/61/74/+9/0/754/98/     21 SW    "     "      = 17 SW
9/9  91/65/78/+14/0/729/95/    20 WSW   "     "      = 16 WSW
9/10 89/67/78/+14/0/504/66/    28 SSW   "     "      = 22 SSW
9/11 77/54/66/+2/0/251/33/     58 NW    "     "      = 44 WNW/ Aero gust 62 
MPH WNW
9/12 69/48/59/-4/0/759/100/    37 NW    "     "      = 28 NW / Aero gust 40 
MPH WNW
9/13 79/51/65/+2/0/703/93/     32 WSW   "     "      = 24 WSW
9/14 83/61/72/+9/0/572/76/     29 S     "     "      = 23 S
9/15 78/67/73/+10/0.42/023/03/ 37 SSW   "     "      = 30 SSW
9/16 76/58/56/+5/1.01/000/00/  32 S     "     "      = 21 S
9/17 73/57/65/+3/0.00/.../../  17 NNW   "     "      = 14 NNW
9/18 74/55/64/+4/0.00/.../../  21 S     "     "      = 16 SSW
9/19 77/57/67/+6/0.00/.../../  25 SSW   "     "      = 21 S
9/20 77/57/67/+6/0.00/.../../  28 SSW   "     "      = 23 SSW
9/21 80/62/71/+11/0.00/.../../ 27 SSW   "     "      = 21 SSW
9/22 81/65/73/+13/0.85/.../../ 27 S     "     "      = 23 S/ TSTM
9/23 75/63/69/+9/0.62/.../../  31 S     "     "      = 23 S/ TSTM
9/24 morning lo temp. 58; normal low now 50 degrees...

RECORDS FOR SEPTEMBER 24
HIGH       87 IN 1959
LOW        33 IN 1885,1950,1963
PRECIP     1.19 IN 1955
PEAK GUST  54e SW IN 1940

RECORDS FOR SEPTEMBER 25
HIGH       87 IN 1970
LOW        31 IN 1950
PRECIP     2.68 IN 1961
PEAK GUST  63 SSW IN 1991

RECORDS FOR SEPTEMBER 26
HIGH       87 IN 1958
LOW        36 IN 1905,1922,1978
PRECIP     3.84 IN 1888
PEAK GUST  54e S IN 1977

e = estimated

Robert Skilling 


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