Thursday, April 17, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, APRIL 17, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
CLEAR CONDITIONS TODAY AS STRATOCUMULUS AND COLD
BROUGHT IN FROM OFFSHORE FROM THE NE.
The general flow for today has been from the NE bringing
unseasonable cold and stratocumulus retrograding from offshore.
By 1:00 PM EST the mercury had climbed from a morning low
of 29F to a maximum so far of 39F.
Yesterday’s average temperature of 36 degrees marks the first
large negative departure from the 30 year norms for the month
of April following a stretch of warmth average 5 degrees above
the norm.
Snow and ice pellets that fell yesterday remained only in patches
as a trace in shaded areas around the summit as of 7:00 AM EST
this morning.
Today’s Observations:
7 A.M.
Weather: Scattered stratocumulus, broken cirrostratus
Temperature: 32F; Dew Point: 20F; Wind: NE at 14G23 kts.
Wind: Peak wind from NE @ 26 kts @ 6:21 A.M.
Sea-level pressure: 30.76 ins. Hg, rising unsteadily
Visibility: 50 miles, light distant haze
6-hr max temp: 32F
6-hr min temp: 29F
24-hr precip: none
Snow depth on ground: TRACE
BHO SA 1155 26 SCT E250 BKN 50 417/32/20/0514G23/076/
LGT DSNT HZ ALQDS PK WND 0526/21/ 8/508 53021 10032 20029
10 A.M.
Weather: Scattered stratocumulus, broken cirrostratus
Temperature: 36F; Dew Point: 21F; Wind: NE at 14G24 kts,
Wind: Peak wind gust 28 kts ENE @ 9:39 A.M.
Sea-level pressure: 30.81 ins. Hg, rising then more slowly
Visibility: 40 miles, light distant haze
BHO SA 1455 26 SCT E250 BKN 40 433/36/21/0414G24/081/
LGT DSNT HZ ALQDS PK WND 0628/39/ 8/508 51016
1 P.M.
Weather: Scattered stratocumulus, broken cirrostratus
Temperature: 37F; Dew Point: 23F; Wind: NE at 14G24 kts
Sea-level pressure: 30.78 ins. Hg, decreasing, then more slowly
Visibility: 40 miles, light distant haze
6-hr max temp: 39F
6-hr min temp: 32F
BHO SA 1755 32 SCT E250 BKN 40 424/37/23/0514G22/078/
LGT DSNT HZ ALQDS/ 8/508 56009 10039 10032
WEATHER SUMMARY FOR WEDNESDAY, APRIL 16, 2014
TEMPERATURE (DEGREES F)
MAX…..43 NORMAL…..56
MIN…..28 NORMAL…..38
MEAN….36 NORMAL…..47
DEPARTURE FROM 30-YEAR NORMAL……………………-11
TOTAL DEPARTURE FOR THE MONTH……………………+72 [+4.3 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..29 DEPARTURE………+11
TOTAL HEATING UNITS FOR THE MONTH………….264 DEPARTURE………-73
TOTAL HEATING UNITS FOR THE SEASON………..5891 DEPARTURE………+71
TOTAL HEATING UNITS LAST SEASON TO DATE……5343 DIFFERENCE…….+548
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………39 NNW AT 7:28 A.M.
AERO…………………..N/A
ASOS…………………..43 NW AT 7:28 A.M.
DAVIS………………….34 NW AT 6:50 A.M. RMY 39
FASTEST MILE FOR YESTERDAY………………..30 NNW AT 7:04 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..28 NW AT 6:50 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….25 NW AT 7:28 A.M.
AVERAGE WIND SPEED AND DIRECTION…………14.7 NNW
ASOS…………………15.0
DAVIS………………..12.8 NW [321 deg]
* last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE………….-0.15
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….2.86 DEPARTURE………….+0.20
ASOS…………..2.84
TOTAL PRECIPITATION FOR THE YEAR……….17.98 DEPARTURE………….+1.32
ASOS………….18.38
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE…………..-0.1
TOTAL SNOWFALL FOR THE MONTH…………….0.8 DEPARTURE…………..-1.5
TOTAL SNOWFALL FOR THE SEASON…………..85.6 DEPARTURE………….+23.6
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/-1/0.00/0.0/694/91 29 NNE AERO N/A RMY N/A
4/2 56/34/45/+4/0.00/0.0/452/69 22 WSW AERO 20 MPH WSW RMY N/A
4/3 55/36/46/+4/0.00/0.0/707/92 23 NNW AERO 22 MPH NW RMY 25
4/4 47/35/41/-1/0.31/0.0/255/33 26 ESE AERO N/A RMY 25
4/5 51/33/42/-1/0.19/0.0/186/24 39 WNW AERO N/A RMY 40
4/6 58/29/44/+1/0.00/0.0/755/97 25 W AERO N/A RMY N/A
4/7 59/44/52/+9/0.05/0.0/187/24 28 SSE AERO N/A RMY N/A
4/8 62/41/52/+8/0.61/0.0/016/02 45 W AERO N/A RMY 44
4/9 60/36/48/+4/0.00/0.0/707/90 35 NW AERO N/A RMY 36
4/10 57/33/45/0/0.00/0.0/742/94 38 S AERO N/A RMY 39
4/11 70/45/58/+13/T/0.0/…/.. 32 S AERO N/A RMY N/A
4/12 68/44/56/+11/0.00/0.0/…/.. 28 W AERO N/A RMY 28
4/13 65/45/55/+10/0.04/0.0/…/.. 35 S AERO N/A RMY N/A
4/14 73/55/64/+18/0.00/0.0/…/.. 55 SW AERO N/A RMY 62
4/15 66/38/52/+5/…./0.0/000/00 62 S AERO N/A RMY 68
4/16 43/28/36/-11/…./…/…/.. 39 NNW AERO N/A RMY 39
4/17 morning low temp: 29F; the normal low is now 38F
DAILY RECORDS FOR APRIL 2014
4/14 – Minimum temperature of 55F EQUALS RECORD HIGH
MINIMUM FOR THIS DATE SET IN 1909.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR APRIL 17
HIGH 93 IN 2002
LOW 21 IN 1908
PRECIP 1.68 IN 1954
SNOWFALL 1.0 IN. IN 1899
PEAK GUST 63 MPH ESE IN 2011
RECORDS FOR APRIL 18
HIGH 92 IN 1976
LOW 23 1887
PRECIP 1.48 IN 1954
SNOWFALL 3.7 IN. IN 1965
PEAK GUST 59 MPH S IN 1982
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
TODAY’S REPORT PREPARED BY: Robert Skilling
