BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, APRIL 8, 2013  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
STRONG AND VERY GUSTY S-SSW WINDS ON SUNDAY AFTERNOON
WINDS DIMINISH STEADILY OVERNIGHT VEERING TO LIGHT W-WNW
DURING THE EARLY MORNING HOURS OF TODAY
 
Peak wind gusts reached 51 MPH from the south and south-
southwest Sunday afternoon with a fastest mile of 40 MPH
and a  peak two minute wind of 39 MPH. Winds averaged over
30 MPH from 2 to 6 P.M. EDT; the fastest hour was 34MPH
Between 5 and 6 P.M. High temperatures only reach the
lower 50's.  
 
Light and becoming variable but mostly WSW-WNW winds
prevailed by mid to late morning along with filtered
sunshine.  By early afternoon the dense high cirrus
clouds had moved away and bright sunshine sent the
temperature into the lower 60's.  The sky had become
perfectly clear [SKC] 
 
Today's observations:
 
7 A.M.
Weather: Scattered dense cirrus, overcast dense cirrus,
few thin spots/break in overcast N, thin fog slowly
dissipating 
Temperature: 44F; Dew Point: 43F; Wind: WSWS at 10 kts,
Sea-level pressure: 30.02 ins. Hg, rising then more slowly
Visibility: 10 miles, except 15 miles NE, thin fog all quadrants
6-hour min. temp: 43F
BHO SA 1155 200 SCT 220 OVC 10 166/44/43/2510/002/
VSBY NE THN FG ALQDS SLOWLY THINNING VSBY INCRSNG
VSBY NE 15 DNS CI ALQDS FEW THN SPTS AND BINOVC N
DEW MANY SFCS/ 8/002 51018 10045 20043
 
10 A.M.
Weather: Scattered dense cirrus (2 levels), thin overcast
cirrus, many thin spots and break in overcast
Temperature: 53F; Dew Point: 37F; Wind: WNW at 6 kts,
Sea-level pressure: 30.05 ins. Hg, rising then more rapidly
Visibility: 30 miles, hazy
BHO SA 1455 200 SCT 220 SCT 250 –OVC 30 177/53/37/2906/005/
PTCHS DNS CI ALQDS HAZY/ 8/002 53011
 
1 P.M.
Weather: Clear, sky perfectly clear, SKC
Temperature: 61F; Dew Point: 35F; Wind: W at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.06 ins. Hg, rising slightly
Visibility: 40 miles, distant haze, WNW 55 miles
NE-SE 30 miles
6-hour max. temp: 63F
BHO SA 1755 CLR 40 181/61/35/2804/006/ SKC DSNT HZ WND L/V
53004 10063 20043
 
WEATHER SUMMARY FOR SUNDAY, APRIL 7
 
TEMPERATURE (DEGREES F)
MAX.....52     NORMAL.....52
MIN.....31     NORMAL.....34                         
MEAN....42     NORMAL.....43  
 
DEPARTURE FROM 30-YEAR NORMAL....................-1
TOTAL DEPARTURE FOR THE MONTH....................-9 [-1.5 DEGREE/DAY]
 
HEATING DEGREE DAYS 
TOTAL HEATING UNITS FOR YESTERDAY............23   DEPARTURE..........+1
TOTAL HEATING UNITS FOR THE MONTH...........169   DEPARTURE..........+9
TOTAL HEATING UNITS FOR THE SEASON.........5189   DEPARTURE........-455
TOTAL HEATING UNITS LAST SEASON TO DATE....4435   DIFFERENCE.......+754
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...............51 S   AT  2:16 P.M.
                   AERO....................46 S   AT  4:04 P.M.
                   ASOS....................51 SW  AT  4.36 P.M.
                   DAVIS...................49 SSW AT  4:40 P.M. RMY: 50
THE FASTEST MILE FOR YESTERDAY.............40 S   AT  4:31 P.M. *  
MAXIMUM 2-MINUTE ASOS AVERAGE..............39 S   AT  4:28 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE.............39 S   AT  4:28 P.M. 
AVERAGE WIND SPEED AND DIRECTION.........19.8 S
                   ASOS..................19.2
                   DAVIS.................17.5 S [190 deg]
* Last of several occurrences
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE...........-0.17
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.34  DEPARTURE...........-0.85
                         ASOS..............0.35
TOTAL PRECIPITATION FOR THE YEAR..........14.43  DEPARTURE...........-0.76
                         ASOS..............N/A*
*ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals
                       
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............-1.2
TOTAL SNOWFALL FOR THE SEASON.............99.0   DEPARTURE...........+38.1
 
PRELIMINARY CLIMATE SUMMARY FOR APRIL 2013 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
....: Data not yet available, records not finalized
 
4/1  61/31/46/+5/0.34/0.0/458/60     40 W   AERO 44 MPH WNW RMY 46
4/2  40/27/34/-7/T/T/460/460/60      45 W   AERO 42 MPH W   RMY 47
4/3  45/27/36/-6/0.00/0.0/755/98     44 W   AERO 43 MPH W   RMY 47
4/4  55/26/41/-1/0.00/0.0/719/93     30 WSW AERO 27 MPH WSW RMY 31
4/5  59/36/48/+5/0.00/0.0/403/52     33 NNW AERO 28 MPH NNW RMY 38
4/6  47/30/39/-4/0.00/0.0/747/96     38 NW  AERO 35 MPH NW  RMY 40 
4/7  52/31/42/-1/0.00/0.0/.../..     51 S   AERO 46 MPH S   RMY 50
 
4/8   morning low temp: 43F; the normal low is now 35F
 
DAILY RECORDS FOR APRIL 2013
None so far.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR APRIL 8
HIGH 87 IN 1991
LOW 17 IN 1888
PRECIP 1.78 IN. IN 1956
SNOWFALL 9.3 IN. IN 1956
PEAK GUST 70 MPH S IN 2000
 
RECORDS FOR APRIL 9
HIGH 83 IN 1991
LOW 18 IN 1888
PRECIP 2.38 IN. IN 1935
SNOWFALL 11.0 IN. IN 1917
PEAK GUST 72 MPH WNW IN 1962
 
TODAY'S REPORT PREPARED BY: Robert Skilling