Friday, April 26, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, APRIL 26, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
OVERCAST WITH PERIODS OF RAIN AND INCREASING
AFTERNOON WINDS….
Today has remained overcast, with light rain this morning
amounting to 0.03 inches. Fog has held visibility at an
average of 10 miles throughout the day, but has thickened
since the 1 P.M. observation. Wind has become stronger
this afternoon following a 5 millibar pressure decrease
between 7 A.M. and 1 P.M. The max gust so far today is
32 mph, seen shortly after noontime. The high so far
today is 47F, 13 degrees below the daily normal of 60F.
The low since midnight is 44F, 3 degrees above the
normal minimum of 41F.
The calendar day rainfall on Monday, 4/22, was more than
two and a half inches, which made it one of the wettest
calendar days ever observed in April. The finalized
amount for the day will be reported when available.
BHO Greatest April Calendar Day Precipitation, inches (1885-2019):
1) 3.47 on April 1, 2004
2) 3.18 on April 21, 1991
3) 2.63 on April 16, 2018
4) 2.51 on April 24, 1898
2.51 on April 13, 2004
6) 2.45 on April 16, 1929
7) 2.41 on April 28, 1904
8) 2.40 on April 10, 1935
Today’s Observations:
7 A.M.
Weather: Overcast nimbostratus, few stratus fractus,
light rain
Temperature: 45F; Dew Point: 45F; Wind: ESE at 8G15 kts
Sea-level pressure: 29.91 ins. Hg, steady
Visibility: 10 miles, fog
6-hr Max temp: 45F
6-hr Min temp: 44F
24-hr Precip: 0.01 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 E65 OVC 10R-F 129/45/45/1108G15/991/ R-CTD
FEW STFA ALQDS/ 8/72/ 70001 50000 10045 20044
10 A.M.
Weather: Overcast nimbostratus, few stratus fractus,
light drizzle
Temperature: 45F; Dew Point: 45F; Wind: ESE at 13G18 kts
Sea-level pressure: 29.87 ins. Hg, falling steadily
Visibility: 10 miles, fog
3-hr Precip: 0.02 ins.
BHO SA 1455 E65 OVC 10L-F 115/45/45/1213G18/987/ L-CTD
FEW STFA ALQDS/ 8/72/ 6002/ 58014
1 P.M.
Weather: Overcast altostratus, few stratus fractus
Temperature: 46F; Dew Point: 44F; Wind: E at 16G24 kts,
Peak wind: 32 MPH (28 kts) E at 12:03 P.M.
Sea-level pressure: 29.75 ins. Hg, falling rapidly
Visibility: 20 miles, distant fog
6-hr Max temp: 47F
6-hr Min temp: 44F
6-hr Precip: 0.02 ins.
6-hr snowfall: 0.0 ins.
BHO SA 1755 E65 OVC 20F 075/46/44/0916G24/975/ FEW STFA
DSNT FG ALQDS PK WND 0928/03/ 8/72/ 6002/ 56040 10047
20044
SUMMARY FOR THURSDAY, APRIL 25, 2019
TEMPERATURE (DEGREES F)
MAX…..61 NORMAL…..60
MIN…..39 NORMAL…..41
MEAN….50 NORMAL…..50
DEPARTURE FROM 30-YEAR NORMAL…………………….0
TOTAL DEPARTURE FOR THE MONTH…………………..+80 [+3.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..15 DEPARTURE……….0
TOTAL HEATING UNITS FOR THE MONTH………….407 DEPARTURE……..-90
TOTAL HEATING UNITS FOR THE SEASON………..5812 DEPARTURE…….-169
TOTAL HEATING UNITS LAST SEASON TO DATE……5636 DIFFERENCE……+176
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..22 S AT 7:30 P.M.
AERO…………………….22 S AT 8:44 P.M.
ASOS…………………….22 S AT 8:00 P.M.
DAVIS……………………23 SSE AT 7:59 P.M. RMY 21
FASTEST MILE FOR YESTERDAY………………….16 S AT 8:01 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….17 S AT 8:01 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………17 SSE AT 8:01 P.M.
AVERAGE WIND SPEED AND DIRECTION……………9.1 NW
ASOS……………………8.6
DAVIS…………………..9.5 S [187 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01 DEPARTURE…….-0.12
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….6.44 DEPARTURE…….+2.56
ASOS…………..6.34
TOTAL PRECIPITATION FOR THE YEAR……….19.48 DEPARTURE…….+1.60
ASOS………….19.49
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………0.0 DEPARTURE……..-0.1
TOTAL SNOWFALL FOR THE MONTH………….TRACE DEPARTURE……..-2.9
TOTAL SNOWFALL FOR THE SEASON………….47.6 DEPARTURE…….-15.0
PRELIMINARY CLIMATE SUMMARY FOR MARCH CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
04/01 45/29/37/-4/0.00/0.0/748/98 40 WNW AERO 37 W RMY 42
04/02 50/27/39/-2/…./0.0/605/79 29 S AERO 25 S RMY 31
04/03 62/35/49/+7/…./0.0/484/63 54 W AERO 58 W RMY 56
04/04 50/34/42/0/…./0.0/717/93 46 W AERO 41 W RMY N/A
04/05 47/27/37/-6/…./0.0/341/44 23 SSW AERO 17 SSW RMY 23
04/06 64/32/48/+5/…./0.0/536/69 24 NW AERO 18 W RMY 26
04/07 66/41/54/+11/0.00/0.0/320/41 24 S AERO 18 S RMY 25
04/08 48/34/41/-3/0.49/0.0/000/00 25 NE AERO 20 NE RMY 26
04/09 40/32/36/-8/0.08/0.0/000/00 23 NE AERO 16 N RMY 25
04/10 43/30/37/-8/T/T/T/000/00 32 NW AERO 26 NW RMY 36
04/11 51/29/40/-5/0.00/0.0/403/51 23 NW AERO 18 NW RMY N/A
04/12 53/38/46/+1/…./0.0/000/00 35 SSW AERO 29 SSW RMY 39
04/13 71/54/63/+17/…./0.0/167/21 38 SSW AERO 32 SSW RMY N/A
04/14 71/51/61/+15/…./0.0/224/28 25 S AERO 18 S RMY N/A
04/15 67/40/54/+7/…./0.0/168/21 46 W AERO 52 W RMY 50
04/16 58/37/48/+1/0.00/0.0/…/.. 46 W AERO 44 W RMY 44
04/17 62/36/49/+2/0.00/0.0/…/.. 26 ESE AERO 25 S RMY 28
04/18 63/39/51/+3/0.00/0.0/…/.. 44 S AERO 44 S RMY 50
04/19 71/58/65/+17/…./0.0/…/.. 47 SSW AERO 51 SSW RMY 52
04/20 68/60/64/+15/…./0.0/…/.. 50 SSW AERO 54 SSW RMY 52
04/21 68/51/60/+11/…./0.0/…/.. 35 S AERO 35 S RMY N/A
04/22 53/45/49/0/…./0.0/…/.. 35 NNE AERO 32 NNE RMY 35
04/23 52/44/48/-2/…./0.0/…/.. 30 NNE AERO 26 NNE RMY N/A
04/24 65/44/55/+5/…./0.0/…/.. 29 WNW AERO 29 WNW RMY 30
04/25 61/39/50/0/0.00/0.0/…/.. 22 S AERO 22 S RMY 21
04/26 Low temp since midnight is 44F; normal low is 42F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR APRIL 26
HIGH 88 IN 2009
LOW 23 IN 1919
PRECIP 1.64 IN. IN 1931
SNOWFALL 1.0 IN. IN 2000
PEAK GUST 53 MPH SSW IN 1996
RECORDS FOR APRIL 27
HIGH 93 IN 1990
LOW 28 IN 1919
PRECIP 1.89 IN 1979
SNOWFALL 2.7 IN. IN 1993
PEAK GUST 65e MPH N IN 1941
TODAY’S REPORT PREPARED BY: Benjamin Turner
