Saturday, April 5, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, APRIL 5, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
LIGHT TO MODERATE RAINFALL OVERNIGHT AMOUNTS TO ONE HALF INCH…
DENSE FOG EARLY THIS MORNING LIFTS TO LOW CLOUDS WITH
OCCASIONAL BREAKS THIS AFTERNOON…
Rain showers Friday evening turned into a steadier rain during
the night with the heaviest falling in a downpour just after
2 AM EST today that brought about 0.15 inch in 20 minutes.
By 7 AM EST, the rain had ended, but the summit was shrouded
in dense fog. This lifted within a few hours, and low clouds
have dominated the sky since then. Occasionall breaks in
the clouds have brought a few minutes of sunshine. The
visibility has climbed from 1/16 mile early today to 70 miles
as of early afternoon. The wind has picked up throughout the
day with a peak gust so far of 35 mph from the WNW occurring
at 1:32 PM EST.
MARCH 2014 PRELIMINARY STATISTICS
[Departures are relative to the 1981-2010 averages]TEMPERATURE: Deg. F
Avg. Max. 40.5 [-3.8]
Avg. Min. 22.0 [-4.6]
Mean 31.3 [-4.2]
24-hr. corrected mean: 31.1
Max. temp: 57 on the 28th
Min. temp: 6 on the 4th
Total heating degree day units: 1,036 [+120]
Total seasonal heating units: 5,627 [+143]
[Season starts 7/1]
Seasonal total this date 2012: 5,020 [+607]
PRECIPITATION: Inches
Total: 5.03 [-0.55]
Greatest in 24 hours: 2.73 inches, 30th-31st
Total snowfall: 3.0 inches [-9.7]
Greatest in 24 hours: 1.4 inches on the 13th
WIND
Av. speed (uncorrected): 12.7 mph
Av. speed (corrected): 13.1 mph
Prevailing direction: NW @ 13% possible
SUNSHINE
Total astronomical minutes: 10,395 of possible 22,247 or 47%
Total Campbell Stokes card minutes; 10,056 of possible 21,516 or 47% [-2%]
More data will be made available in the next few days…
Today’s Observations:
7 A.M.
Weather: Sky obscured in dense fog
Temperature: 38F; Dew Point: 38F; Wind: NW at 10 kts,
Sea-level pressure: 29.72 ins. Hg, rising
Visibility: 1/16 mile
6-hr max temp: 39F
6-hr min temp: 36F
24-hr precip: 0.50 inch
BHO SA 1155 W1 X 1/16F 063/38/38/3210/972/ 8//// 53002 60///
70050 10039 20036
10 A.M.
Weather: Broken stratocumulus, overcast stratocumulus, hazy
Temperature: 42F; Dew Point: 40F; Wind: WNW at 11G18 kts,
Sea-level pressure: 29.73 ins. Hg, rising
Visibility: 50 miles, hazy
BHO SA 1455 E9 BKN 15 OVC 50 068/42/40/2911G18/973/ HAZY/
8/5// 51005
1 P.M.
Weather: Broken stratocumulus, overcast stratocumulus, breaks
in overcast all quadrants, light distant haze
Temperature: 51F; Dew Point: 34F; Wind: WNW at 17G21 kts,
Wind: Peak gust 30 mph WNW at 12:09 PM EST
Sea-level pressure: 29.73 ins. Hg, decreasing slightly
Visibility: 70 miles, light distant haze
6-hr max temp: 51F
6-hr min temp: 38F
BHO SA 1755 E40 BKN 50 OVC 70 067/51/34/2917G21/973/ BINOVC ALQDS
LGT DSNT HZ PK WND 2926/09/ 8/5// 58001 10051 20038
WEATHER SUMMARY FOR FRIDAY, APRIL 4, 2014
TEMPERATURE (DEGREES F)
MAX…..47 NORMAL…..51
MIN…..35 NORMAL…..33
MEAN….41 NORMAL…..42
DEPARTURE FROM 30-YEAR NORMAL…………………….-1
TOTAL DEPARTURE FOR THE MONTH…………………….+6 [+1.3 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..24 DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE MONTH…………..88 DEPARTURE……….-6
TOTAL HEATING UNITS FOR THE SEASON………..5715 DEPARTURE……..+137
TOTAL HEATING UNITS LAST SEASON TO DATE……5123 DIFFERENCE…….+592
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………26 ESE AT 8:51 A.M.
AERO…………………..N/A
ASOS…………………..26 ESE AT 3:34 A.M.
DAVIS………………….23 E AT 3:33 A.M. RMY 25
FASTEST MILE FOR YESTERDAY………………..19 ESE AT 3:40 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..20 ESE AT 8:52 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….18 ESE AT 3:38 A.M.
AVERAGE WIND SPEED AND DIRECTION…………10.8 ESE
ASOS…………………10.5
DAVIS…………………8.9 E [094 deg]
* Last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.50 DEPARTURE………….+0.33
ASOS…………..0.48
TOTAL PRECIPITATION FOR THE MONTH……….0.50 DEPARTURE………….-0.18
ASOS…………..0.48
TOTAL PRECIPITATION FOR THE YEAR……….15.62 DEPARTURE………….+0.94
ASOS………….16.02
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE…………..-0.2
TOTAL SNOWFALL FOR THE MONTH…………….0.0 DEPARTURE…………..-0.8
TOTAL SNOWFALL FOR THE SEASON…………..84.8 DEPARTURE………….+24.3
PRELIMINARY CLIMATE SUMMARY FOR APRIL 2014 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO 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 48/31/40/-1/0.00/0.0/…/.. 29 NNE AERO N/A
4/2 56/34/45/+4/0.00/0.0/…/.. 22 WSW AERO 20 MPH WSW RMY N/A
4/3 55/36/46/+4/0.00/0.0/…/.. 23 NNW AERO 22 MPH NW RMY 25
4/4 47/35/41/-1/…/0.0/…/.. 26 ESE AERO N/A RMY 25
4/5 morning low temp: 35F; the normal low is now 34F
DAILY RECORDS FOR APRIL 2014
None
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR APRIL 5
HIGH 81 IN 1928
LOW 15 IN 1995
PRECIP 2.15 IN. IN 1987
SNOWFALL 4.0 IN. IN 1898
PEAK GUST 76 MPH WNW IN 1963
RECORDS FOR APRIL 6
HIGH 82 IN 1921
LOW 16 IN 1982
PRE 1.72 INS IN 1886
SNOW 12.3 INS IN 1982
WIND 71e MPH WNW IN 1940
TODAY’S REPORT PREPARED BY: Mike Iacono
