BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, APRIL 18, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
 
STRATOCUMULUS AND COLD CONTINUE THROUGH TODAY
WITH OVERCAST SKIES.
 
For a second day in a row winds from the NE at the surface
have brought chilly temperatures and thick stratocumulus
from offshore. With only a maximum of 42F so far today
after yesterday's 13 degree temperature from the 30 year
norm, it appears Friday will be another colder-than-average
day.
 
A trace of frozen and liquid equivalent fell yesterday as
snow flurries during yesterday afternoon. By 7:00 AM EST
this morning no snow was left on the ground.
 
Barometric pressure has also been significantly high the
past few days, with yesterday's maximum sea level pressure
of 30.80 inches of mercury representing the highest pressure
since 30.81 inches in March 21, 2007 and 30.84
in January of 1999.
 
Today's Observations:
 
7 A.M.
Weather: Thin overcast of stratocumulus, breaks in the
overcast overhead
Temperature: 35F; Dew Point: 28F; Wind: ENE at 11G18 kts.
Sea-level pressure: 30.54 ins. Hg, falling unsteadily
Visibility: 25 miles, distant haze  
6-hr max temp: 35F
6-hr min temp: 28F
24-hr precip: TRACE
24-hr snowfall: TRACE
Snow depth on ground: 0
BHO SA 1155 E18 OVC- 25 343/35/28/0611G18/054/
BINOVC OVHD HZ DSNT ALQDS/ 8/5// 57018 10035 20028
 
10 A.M.
Weather: Overcast stratocumulus
Temperature: 38F; Dew Point: 29F; Wind: ENE at 8 kts,
Sea-level pressure: 30.55 ins. Hg, rising then falling but higher still
Visibility: 25 miles, distant haze
BHO SA 1455 E20 OVC 25 346/38/29/0608/055/ HZ DSNT ALQDS/ 8/5// 50003
 
1 P.M. 
Weather: Overcast stratocumulus, hazy
Temperature: 40F; Dew Point: 29F; Wind: ENE at 7 kts
Sea-level pressure: 30.47 ins. Hg, decreasing, then more slowly
Visibility: 20 miles, 15 miles NNW-NNE, distant haze 
6-hr max temp: 42F
6-hr min temp: 35F 
BHO SA 1755 E20 OVC 20 320/40/29/0607/047/
HZ DSNT ALQDS VSBY NNW-NNE 15 MI/ 8/5// 56026 10042 20035
 
WEATHER SUMMARY FOR THURSDAY, APRIL 17, 2014
 
TEMPERATURE (DEGREES F)
MAX.....39    NORMAL.....56
MIN.....29    NORMAL.....38
MEAN....34    NORMAL.....47
 
DEPARTURE FROM 30-YEAR NORMAL........................-13
TOTAL DEPARTURE FOR THE MONTH........................+59 [+3.3 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............31  DEPARTURE.........+13
TOTAL HEATING UNITS FOR THE MONTH.............295  DEPARTURE.........-59     
TOTAL HEATING UNITS FOR THE SEASON...........5922  DEPARTURE.........+84
TOTAL HEATING UNITS LAST SEASON TO DATE......5350  DIFFERENCE.......+572
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................35 NE  AT  8:34 A.M.   
                   AERO.......................N/A 
                   ASOS.......................33 NE  AT  7:45 A.M.   
                   DAVIS......................31 NNE AT  8:34 A.M. RMY 34
FASTEST MILE FOR YESTERDAY....................24 NNE AT  7:45 A.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE.................23 NE  AT  7:46 A.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE................22 NE  AT  7:46 A.M.    
AVERAGE WIND SPEED AND DIRECTION............12.6 NE        
                   ASOS.....................12.6       
                   DAVIS....................11.0 NE [51 deg]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...TRACE  DEPARTURE.............-0.14
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........2.86  DEPARTURE.............+0.06      
                         ASOS..............2.84
TOTAL PRECIPITATION FOR THE YEAR..........17.98  DEPARTURE.............+1.18
                         ASOS.............18.38
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M........TRACE  DEPARTURE..............-0.1
TOTAL SNOWFALL FOR THE MONTH................0.8  DEPARTURE..............-1.6
TOTAL SNOWFALL FOR THE SEASON..............85.6  DEPARTURE.............+23.5
 
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 39/29/34/-13/T/T/.../..              35 NE  AERO N/A        RMY 34
 
4/18 morning low temp: 28F; the normal low is now 39F
 
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 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
 
RECORDS FOR APRIL 19
HIGH 94 IN 1976 [RECORD FOR MONTH]
LOW 21 IN 1890
PRECIP 1.71 IN 1969
SNOWFALL 6.0 IN. IN 1887
PEAK GUST 66 MPH E IN 1984
 
TODAY'S REPORT PREPARED BY: Brian Fitzgerald