BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY CLIMATE SUMMARY
THURSDAY, APRIL 22, 2004
ALL TIMES ARE IN EASTERN DAYLIGHT TIME
[unless otherwise noted]
DISCUSSION....
Warm temperatures reaching mid-70's with bright sunshine but hazy
conditions--just a beatiful April day. April is now on the warm side
of normal by about one degree.
TODAYS OBSERVATIONS....
4/22/2004 THU
8 a.m. low stratus overcast with 4 miles view in light fog; and 55 deg;
dewpoint 53; wind south at 18 mph...
six hour minimum temp. 48 deg.
BHO SA 1155 E3 OVC 4F 166/55/53/1916/002/ 8//// 53004 10055 20049
11 a.m. high thin broken cirrus with 12 miles view and hazy;
temp. 66; dewpoint 56; wind south-southwest at 15 mph...
BHO SA 1455 250 -SCT 300 -BKN 12 166/66/56/2113/002/ FEW SC ALQDS
FEW AC W-N HAZY WIND 17V24/ 8/531 55000
2 p.m. thin broken high clouds and hazy visibility 20 miles;
temp. 76; dewpoint 55; wind sw 17 gusting 22 mph; wind variable
south to west; six hour maximum temp. 77 deg.
BHO SA 1755 150 SCT 300 -BKN 20 152/76/55/2315G19/998/ FEW SML CU FRMG SW-N
ACSL ALQDS VSBY E-S 15 HAZY ALQDS WND 18V27/ 8/141 56014 10077 20055
WEATHER SUMMARY FOR WEDNESDAY, APRIL 21:
TEMPERATURE (DEGREES F)
MAX.....62 NORMAL.....57 HAZEN......62.2 @ 1:34 p.m. EDT
MIN.....42 NORMAL.....39 HAZEN ... 42.0 @ 5:54 a.m. EDT
MEAN....52 NORMAL.....48
DEPARTURE FROM 30-YEAR NORMAL.....+4
TOTAL DEPARTURE FOR THE MONTH.....+28 (+1.1 DEGREE/DAY)
HEATING DEGREE DAYS
TOTAL HEATING DEGREE DAYS FOR YESTERDAY.......13 DEPARTURE.....-4
TOTAL HEATING DEGREE DAYS FOR THE MONTH......399 DEPARTURE.....-28
TOTAL HEATING DEGREE DAYS FOR THE SEASON....5891 DEPARTURE.... 0
TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6325 DIFFERENCE..- 434
PEAK GUST AND AVERAGE WIND SPEED (MPH)[ALL TIMES EASTERN DAYLIGHT TIME ]
PEAK WIND GUST FOR YESTERDAY........28 SSE AT 8:56 P.M.
AEROVANE.........30 SSE AT 7:36 P.M.
ASOS.............29 SSE AT 8:57 P.M.
FASTEST MILE FOR YESTERDAY......... 21 SSE AT 7:37 P.M. **
MAXIMUM 2-MINUTE ASOS AVERAGE.......22 SSE AT 8:59 P.M.
AVERAGE WIND SPEED AND DIRECTION.. 11.3 SSE
ASOS.............11.8
** also one earlier occurrence...
PRECIPITATION (INCHES) THROUGH THIS MORNING
TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.00 DEPARTURE....-0.14
ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........7.20 DEPARTURE....+4.10
ASOS..............6.78
TOTAL PRECIPITATION FOR THE YEAR..........14.87 DEPARTURE....-1.55
ASOS.............13.66
SNOWFALL (INCHES) THROUGH THIS MORNING
TOTAL SNOWFALL FOR 24 HRS ENDING 8 A.M......0.0 DEPARTURE....-0.1
TOTAL SNOWFALL FOR THE MONTH................0.5 DEPARTURE....-2.2
TOTAL SNOWFALL FOR THE SEASON..............58.0 DEPARTURE....+2.9
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/+1/0/0/564/72 25 MPH S
4/9 60/39/50/+6/T/0/550/70 32 MPH W
4/10 57/34/46/+2/0/0/718/91 40 MPH W
4/11 51/36/44/-1/0/0/063/08 21 MPH W
4/12 47/36/42/-3/0.07/0/341/43 30 MPH ENE
4/13 59/37/48/+3/2.51/0/000/00 56 MPH S Aerovane 61 MPH S
4/14 59/44/52/+6/0.41/0/000/00 62 MPH S Aerovane 64 MPH S
4/15 52/37/45/-1/0.13/0/297/37 36 MPH N Aerovane 38 MPH NNW
4/16 51/33/42/-3/0/0/605/70 32 MPH NNW
4/17 74/34/55/+8/0/0/501/62 29 MPH S
4/18 63/46/55/+8/0/0/.../.. 32 MPH SE
4/19 83/44/64/+17/0/0/.../.. 43 MPH SSW
4/20 67/44/56/+8/0/0/.../.. 45 MPH W Aerovane 46 MPH W
4/21 62/42/52/+4/0/0/.../.. 28 MPH SSE
4/22 morning low 48 deg...
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
THE NEW APRIL RECORDS....
There are FOUR NEW APRIL RECORDS which have been established
thus far this month.
April 13 - Rainfall 2.51 inches for calendar day; previous record
1.95 inches in 1933.
April 1 - Rainfall 3.47 inches for calendar day; previous record
was 2.28 inches in 1962.
April record - New greatest daily rainfall 3.47 inches for any date
during April occurred on April 1; previous record 3.18 inches
on April 21, 1991.
April record - New greatest rainfall in "any" twenty-four hour
period during April of 3.47 inches occurred on April 1.
The previous record was 3.19 inches on April 20-21, 1991.
RECORDS FOR APRIL 22
HIGH 85 IN 1977, 2001
LOW 26 IN 1981
PRECIP 1.85 INCHES IN 2000
SNOWFALL 3.0 INCHES IN 1940
PEAK GUST 68e MPH NW IN 1945
RECORDS FOR APRIL 23
HIGH 85 IN 1908
LOW 25 IN 1933,1989
PRECIP 1.51 INCHES IN 1998
SNOWFALL 0.5 INCHES IN 1911, 1956
PEAK GUST 64 MPH WNW IN 1962
TODAY'S REPORT BY: Robert Skilling