Friday, April 13, 2018
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, APRIL 13, 2018
ALL TIMES ARE IN EASTERN STANDARD TIME
ABOVE SEASONABLE TEMPERATURES AND HAZY CONDITIONS
CONTINUE…
Today temperatures continued to be above seasonable
with a max of 65F by 1:00 P.M, is already 10 degrees
above the daily normal of 55F. Since midnight we had
a low of 48F, 11 degrees above the daily normal of
37F. A few rain showers have passed by the observatory
today but only a trace of precipitation accumulated.
Wind has remained from the south, has slowed since
yesterday afternoon’s moderate gust. Visibility
was also limited today again due to a distant haze.
We had low humidity and reached a max visibility of
60 miles by 1:00 P.M.
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus, scattered cirrostratus
Temperature: 56F; Dew Point: 41F; Wind: W at 11G18 kts,
Peak Wind: 27 kts (31 MPH) WSW at 6:10 A.M.
Sea-level pressure: 29.87 ins. Hg, rising, then more slowly
Visibility: 40 miles, distant haze in all directions
6-hr Max temp: 57F
6-hr Min temp: 49F
24-hr precip: 0.03 ins.
24-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1155 180 SCT 250 SCT 40 114/56/41/2511G18/987/
DSNT HZ ALQDS PK WND 2427/10/ 8/036 51027 MANUAL 70003
ASOS 70005 10057 20049
10 A.M.
Weather: Broken altocumulus, broken altostratus
Temperature: 62F; Dew Point: 41F; Wind: WSW at 6 kts,
Wind: Light
Sea-level pressure: 29.92 ins. Hg, rising, then more slowly
Visibility: 40 miles, distant haze in all directions
3-hr precip: Trace
3-hr snowfall: 0.0 ins.
BHO SA 1455 E130 BKN E200 BKN 40 132/62/41/2406/992/
DSNT HZ ALQDS WND LGT/ 8/010 51018 MANUAL 600//
1 P.M.
Weather: Broken altocumulus, overcast cirrostratus
Temperature: 65F; Dew Point: 44F; Wind: SW at 4 kts,
Wind: Light
Sea-level pressure: 29.93 ins. Hg, falling then rising
Visibility: 60 miles, distant haze in all directions
6-hr Max temp: 65F
6-hr Min temp: 56F
6-hr precip: Trace
6-hr snowfall: 0.0 ins.
Snow depth: 0 ins.
BHO SA 1755 E120 BKN E250 OVC 60 134/65/44/2304/993/
DSNT HZ ALQDS WND LGT/ 8/036 53002 MANUAL 600// 10065 20056
SUMMARY FOR THURSDAY, APRIL 12, 2018
TEMPERATURE (DEGREES F)
MAX…..61 NORMAL…..54
MIN…..33 NORMAL…..36
MEAN….47 NORMAL…..45
DEPARTURE FROM 30-YEAR NORMAL………………………+2
TOTAL DEPARTURE FOR THE MONTH……………………..-57 [-5.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY………….18 DEPARTURE……….-2
TOTAL HEATING UNITS FOR THE MONTH…………319 DEPARTURE………+57
TOTAL HEATING UNITS FOR THE SEASON……….5377 DEPARTURE……..-369
TOTAL HEATING UNITS LAST SEASON TO DATE…..5115 DIFFERENCE…….+262
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….39 SSW AT 11:32 P.M.
AERO……………………38 SSW AT 11:33 P.M.
ASOS……………………41 S AT 11:33 P.M.
DAVIS…………………..41 M AT 11:33 P.M ** RMY 41
FASTEST MILE FOR YESTERDAY…………………30 SSW AT 11:33 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………30 S AT 11:34 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..30 M AT 11:34 P.M.**
AVERAGE WIND SPEED AND DIRECTION………….13.0 SSW
ASOS………………….13.5
DAVIS…………………12.9 M**
** Davis direction malfunctioning
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.03 DEPARTURE……-0.14
ASOS…………..0.05
TOTAL PRECIPITATION FOR THE MONTH……….1.16 DEPARTURE……-0.88
ASOS…………..1.02
TOTAL PRECIPITATION FOR THE YEAR……….19.96 DEPARTURE……+4.10
ASOS………….21.11
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……..-0.1
TOTAL SNOWFALL FOR THE MONTH…………….2.6 DEPARTURE……..+0.7
TOTAL SNOWFALL FOR THE SEASON…………..92.8 DEPARTURE…….+31.1
PRELIMINARY CLIMATE SUMMARY FOR APRIL 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
4/01 58/33/46/+5/…./0.0/336/44 45 SSW AERO 43 SSW RMY N/A
4/02 38/30/34/-7/…./1.6/077/10 20 SSW AERO 15 SSW RMY 17
4/03 48/30/39/-3/…./0.0/…/.. 28 SSE AERO 25 SSE RMY 25
4/04 54/36/45/+3/…./0.0/…/.. 56 WNW AERO 56 WNW RMY 54
4/05 40/27/34/-9/0.00/0.0/…/.. 53 WNW AERO 53 WNW RMY 52
4/06 41/25/33/-10/0.25/1.0/…/.. 37 S AERO 36 S RMY 38
4/07 46/32/35/-4/0.00/0.0/…/.. 32 WNW AERO 35 WNW RMY 34
4/08 41/29/35/-9/0.00/0.0/…/.. 35 WNW*AERO 31 WNW RMY 34
4/09 45/24/35/-9/0.00/0.0/…/.. 28 WNW*AERO 25 WNW RMY 29
4/10 39/31/35/-10/T/T/…/.. 14 SSW AERO 13 SSW RMY N/A
4/11 48/29/39/-6/T/0.0/…/.. 24 SSE AERO 23 SSE RMY 25
4/12 61/33/47/+2/…./0.0/…/.. 39 SSW AERO 38 SSW RMY 41
4/13 Low temp since midnight is 48F; normal low is now 36F
*Estimated
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR APRIL 13
HIGH 85 IN 1945
LOW 22 IN 1939
PRECIP 2.51 IN. IN 2004
SNOWFALL 6.8 IN. IN 1933
PEAK GUST 59 MPH SSW IN 1995
RECORDS FOR APRIL 14
HIGH 80 IN 1945
LOW 21 IN 1923
PRECIP 2.22 IN. IN 1895
SNOWFALL 8.4 IN. IN 1953
PEAK GUST 71e MPH W IN 1943
TODAY’S REPORT PREPARED BY: K.A. Geagan
