Tuesday, April 26, 2016
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, APRIL 26, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME
LOW PRESSURE SYSTEM BRINGS RAINFALL AND COOLER THAN
NORMAL TEMPERATURES
Temperatures were decreasing since midnight from a high of 52F
just past midnight to 37F by the 1:00 PM EST observation, 5F below
the average minimum temperature of 42F.
Rain began shortly after the 7:00 AM EST observation and totaled
0.34 in. by 1:00 PM. Skies were overcast at each observation.
Visibility was reduced to 10 miles as rain showers and fog moved
into the area.
Today’s Observations:
7 A.M.
Weather: Overcast altostratus
Temperature: 42F; Dew Point: 27F; Wind: ENE at 16G22 kts,
Sea-level pressure: 29.84 ins. Hg, falling, then more quickly
Visibility: 40 miles, except 20 miles SSW-N
6-hr Max temp: 50F
6-hr Min temp: 42F
24-hr precip: 0.00 in.
BHO SA 1155 E40 OVC 40 104/42/27/0716G22/984/
VSBY SSW-N 20 PK WND 0827/1058/ 8/6// 58019 10050 20042
10 A.M.
Weather: Light rain, overcast nimbostratus, few stratus fractus W-ENE
Temperature: 39F; Dew Point: 34F; Wind: ENE at 11G18 kts,
Sea-level pressure: 29.78 ins. Hg, falling, then more quickly
Visibility: 10 miles, thin fog in all directions
3-hr precip: 0.04 in.
BHO SA 1455 E35 OVC 10R- 086/39/34/0711G18/978/ FEW STFRA W-ENE
THN FG ALQDS R-B35/ 8/72/ 58018 ASOS 60003 MANUAL 60004
1 P.M.
Weather: Light rain, overcast nimbostratus
Temperature: 37F; Dew Point: 36F; Wind: NNE at 11G19 kts,
Sea-level Pressure: 29.76 ins. HG, falling, then more slowly
Visibility: 10 miles
6-hr Max temp: 42F
6-hr Min temp: 36F
BHO SA 1755 E12 OVC 10R- 079/37/36/0311G19/976/ 8/6//
56007 ASOS 60034 MANUAL 60034 10042 20036
SUMMARY FOR MONDAY, APRIL 25, 2016
TEMPERATURE (DEGREES F)
MAX…..63 NORMAL…..60
MIN…..41 NORMAL…..41
MEAN….52 NORMAL…..50
DEPARTURE FROM 30-YEAR NORMAL…………………….+2
TOTAL DEPARTURE FOR THE MONTH…………………….-2 [-0.3] DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..13 DEPARTURE……….-2
TOTAL HEATING UNITS FOR THE MONTH………….486 DEPARTURE……….+3
TOTAL HEATING UNITS FOR THE SEASON………..4905 DEPARTURE…….-1061
TOTAL HEATING UNITS LAST SEASON TO DATE……6196 DIFFERENCE……-1291
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….23 W AT 1:06 P.M.
ASOS……………………23 W AT 3:02 P.M.
DAVIS…………………..22 WSW AT 3:01 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………16 W AT 3:21 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………17 W AT 3:16 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..16 W AT 3:15 P.M.
AVERAGE WIND SPEED AND DIRECTION……………5.6 S
ASOS……………………6.5
DAVIS…………………..5.1 SW [230 Deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.81 DEPARTURE……-0.06
ASOS…………..4.01
TOTAL PRECIPITATION FOR THE YEAR……….16.39 DEPARTURE……-1.48
ASOS………….17.02
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……..0.0
TOTAL SNOWFALL FOR THE MONTH……………15.0 DEPARTURE……+12.1
TOTAL SNOWFALL FOR THE SEASON…………..57.5 DEPARTURE…….-5.6
PRELIMINARY CLIMATE SUMMARY FOR APRIL CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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
4/1 66/54/60/+19/…./0.0/092/12 39 SSW AERO N/A RMY 43
4/2 54/40/47/+6/…./0.0/023/03 23 SSW AERO N/A RMY N/A
4/3 40/23/32/-10/…./7.7/354/46 46 W AERO N/A RMY 55
4/4 28/21/25/-17/0.68/7.3/000/00 29 NNE AERO N/A RMY 25
4/5 35/19/27/-16/0.00/0.0/660/85 25 NW AERO N/A RMY 27
4/6 41/21/31/-12/…./0.0/483/62 44 S AERO N/A RMY N/A
4/7 56/41/49/+6/…./0.0/000/00 53 SSE AERO 59 SSE RMY 55
4/8 52/32/42/-2/T/0.0/353/45 41 WSW AERO 45 WSW RMY 42
4/9 47/29/38/-6/0.00/0.0/417/53 33 NW AERO 39 NW RMY 32
4/10 49/26/38/-7/0.01/0.0/735/93 30 NW AERO 32 NW RMY 31
4/11 58/40/49/+4/0.00/T/182/23 47 S AERO 52 S RMY N/A
4/12 59/37/48/+3/0.30/0.0/040/05 53 S AERO 60 S RMY 54
4/13 53/33/43/-3/0.00/0.0/798/100 21 NNW AERO 25 NNW RMY 21
4/14 48/33/41/-5/0.00/0.0/793/99 28 ENE AERO 28 NNE RMY 26
4/15 54/35/45/-2/0.00/0.0/804/100 26 NNE AERO 28 NNE RMY N/A
4/16 52/39/46/-1/0.00/0.0/783/97 36 NNE AERO 31 NNE RMY 34
4/17 62/36/49/+2/0.00/0.0/809/100 20 NNE AERO 20 NNE RMY 19
4/18 67/45/56/+8/…/0.0/715/88 28 ENE AERO 29 NE RMY 28
4/19 55/41/48/0/…/0.0/440/54 25 NW AERO 30 NW RMY N/A
4/20 57/41/49/0/0.00/0.0/801/98 29 NNW AERO 30 NNW RMY 29
4/21 76/38/57/+8/0.00/0.0/795/97 28 W AERO 29 WSW RMY 28
4/22 80/56/68/+19/…./…/.. 36 S AERO 37 S RMY 36
4/23 60/46/53/+3/…./…/…/.. 26 NNW AERO 60 NNW RMY 24
4/24 59/38/49/-1/0.00/0.0/…/.. 23 NW AERO 25 NW RMY 24
4/25 63/41/52/+2/0.00/0.0/…/.. 23 W AERO 24 W RMY N/A
4/26 low temp since midnight is 39F; normal now 42F
DAILY RECORDS FOR APRIL 2016
4/1/16: NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 54F,
BREAKS PREVIOUS RECORD OF 51F SET IN 1948
4/4/16: NEW DAILY RECORD SNOWFALL OF 7.3 INS,
BREAKS PREVIOUS RECORD OF 3.7 INS SET IN 1975
4/4/16: NEW DAILY RECORD LOW MAXIMUM TEMPERATURE OF 28F,
BREAKS PREVIOUS RECORD OF 32F SET AND TIED IN 1896, 1908, 1975
4/22/16: NEW DAILY RECORD HIGH MINIMUM TEMPERATURE OF 56F,
BREAKS PREVIOUS RECORD OF 55F IN 1977 AND 1992
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: Cecilia Borries-Strigle
