BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY SEPTEMBER 20, 2004
ALL TIMES ARE IN EASTERN DAYLIGHT TIME
TODAY'S DISCUSSION...2 P.M.
This morning we reported the lowest temperature of season again for the second morning
in a row at 43 degrees. Nearby Norwood Airport ( 3 miles southwest ) had a low of
36 degrees this morning as compared to 45 degrees Sunday morning.
Spectacular visibility today for the second day in a row running 80 to 90 miles
and more with temperatures in the lower 60's and dewpoints lower 40's early
this afternoon. Winds have diminished to light northwest after gusts to 40 MPH
NNW (Aerovane) on Sunday. Sunday was a very cool and windy day averaging 10 degrees
below normal but the month is still hanging on to about a half a degree on the
warm side of normal.
The final rainfall for Saturday, the remnants of Ivan, was 3.22 inches in the
standard rain gage and 3.26 inches in the ASOS gage. This was nowhere close
to the record of 4.25 inches on September 18, 1996. The peak gust registered
was 48 MPH NE on the Aerovane wind system and 46 MPH NE for the 420C recorder.
TODAY'S OBSERVATIONS:
9/20/2004 MON
8 a.m. clear with 80 miles view; temp. 46; dewpoint 42; wind nw at 10 mph;
six hourly min. temp. 43 deg...
BHO SA 1155 CLR 80 281/46/42/3209/036/ SC OFFSHR DSNT ENE-SE CI DSNT S-NW/
8/501 53019 10046 20043
11 a.m. clear with 90 miles visibility and temp. 59 deg; dewpoint 42; wind
nw at 07 mph...
BHO SA 1455 CLR 90 274/59/42/3206/034/ FEW SC OFFSHR DSNT ENE-S
FEW CI DSNT W-NW AND DSNT ENE-E/ 8/501 58007
2 p.m. clear few distant clouds visibility 90 miles; temp. 64; dewpoint 42;
wnd wnw 10 gusting 16 mph; six hourly max. temp. 65
BHO SA 1755 CLR 90 256/64/42/3009G14/029/ FEW AC/ACSL DSNT WNW-N FEW CI DSNT SSW-W
AND FEW CI W-N VCNTY STN WND 27V34/ 8/041 56018 10065 20046
ALL TIMES EASTERN DAYLIGHT TIME..
WEATHER SUMMARY FOR SUNDAY, SEPTEMBER 19:
TEMPERATURE (DEGREES F)
MAX.....59 NORMAL.....70 HAZEN SHELTER 58.8 @ 1:14 P.M.
MIN.....43 NORMAL.....52 HAZEN SHELTER 42.7 @ 6:52 A.M.
MEAN....51 NORMAL.....61
DEPARTURE FROM 30-YEAR NORMAL.....-10
TOTAL DEPARTURE FOR THE MONTH.....+13 (+0.5 DEGREES/DAY)
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY........37 NNW AT 5:37 P.M.
AEROVANE.........40 NNW AT 5:37 P.M.
ASOS.............33 NW AT 4:25 P.M.
DAVIS............35 N AT 4:25 P.M.
FASTEST MILE FOR YESTERDAY..........26 NNW AT 5:37 P.M. / 5:32 P.M.
HIGHEST ASOS 2 MIN AV...25 NNW AT 5:40 P.M.
HIGHEST DAVIS 1 MIN AV...30 NNW AT 5:37 P.M.
AVERAGE WIND SPEED AND DIRECTION.. 14.8 NNW
ASOS........... 14.8 NNW / 330 deg.
DAVIS.......... 15.0 NNW / 340 deg.
PRECIPITATION (INCHES)
TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.00 DEPARTURE....-0.14
ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........4.86 DEPARTURE....+2.27
ASOS..............4.88
TOTAL PRECIPITATION FOR THE YEAR..........38.41 DEPARTURE....+2.35
ASOS.............36.76
PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 2004......CALENDAR DAY DATA
DATA REPORTED: 24 HOUR PERIODS ENDING MIDNIGHT EST
DATE MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
... SUNSHINE DATA NOT YET AVAILABLE
9/1 78/60/69/+2/0/763/97 21 MPH WNW
9/2 72/56/64/-2/0/722/92 23 MPH S
9/3 79/57/68/+2/0/743/95 25 MPH SSW
9/4 82/58/70/+4/0/553/71 29 MPH ENE Aero 30 MPH ENE
9/5 67/52/60/-5/0/513/66 25 MPH ENE
9/6 72/51/62/-3/0/720/93 18 MPH SSE LABOR DAY
9/7 80/58/69/+4/0/424/55 24 MPH SSE
9/8 74/63/69/+4/0.79/008/01 23 MPH NE
9/9 80/63/72/+8/0.75/115/15 45 MPH S Aero 51 MPH S Remnants of Frances
9/10 74/56/65/+1/T/610/80 36 MPH WNW Aero 40 MPH NW
9/11 69/55/62/-2/0/456/60 18 MPH NE
9/12 76/53/65/+2/0/719/95 18 MPH SW
9/13 76/57/67/+4/0/513/68 18 MPH NNW
9/14 64/52/58/-5/0/699/93 18 MPH SSE
9/15 69/51/60/-2/0.01/367/49 20 MPH S
9/16 70/60/65/+3/0.09/.../.. 20 MPH SSW
9/17 78/65/72/+10/0/.../.. 23 MPH SSW
9/18 67/53/59/-2/3.22/000/00 46 MPH NE Aero 48 MPH NE Remnants of Ivan
9/19 59/43/51/-10/0/.../.. 37 MPH NNW Aero 40 MPH NNW
9/20 overnight low temp. 43; NORMAL LOW NOW 52
OUR DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR SEPTEMBER 20
HIGH 90 IN 1983
LOW 34 IN 1979
PRECIP: 4.57 INS IN 1899
PEAK GUST 44 MPH NE IN 1972
RECORDS FOR SEPTEMBER 21
HIGH 91 IN 1895
LOW 35 IN 1929, 1956, 1962
PRECIP: 5.58 INS IN 1961
(HURRICANE ESTHER; RETURNED AS TS SEPT 25-26TH)
(That was often referred to as not only the "return of Esther" but
also "the ghost of Esther").
PEAK GUST 186 MPH S IN 1938
(GREAT NEW ENGLAND HURRICANE; CALCULATED GUST, STATION RECORD)
Today's report: Robert Skilling