BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, APRIL 25, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
 
CLEAR AND CALM TODAY WITH CLOUDS ON THE INCREASE
FOLLOWING A GUSTY THURSDAY
 
Thursday's average wind speed of 23.5 MPH (uncorrected) was
well above all our station's average of 14.9 MPH, with gusts
exceeding 40 MPH numerous times throughout the morning and
early afternoon. A peak of 52 MPH from the NW was observed
at 11:57 AM EST.
 
This morning has largely featured very high cirrus fibratus
growing denser along with some cirrostratus forming by late
morning ahead of tomorrow's anticipated rain. 
 
By 1:00 PM EST today a maximum of 62F had been reached
under a thin overcast of cirrus fibratus with a few dense
cirrus in all directions.
 
Today's Observations:
 
7 A.M.
Weather: Thin overcast of cirrus fibratus
Temperature: 45F; Dew Point: 26F; Wind: NNW at 9 kts,
Sea-level pressure: 30.02 ins. Hg, rising unsteadily
Visibility: 80 miles
6-hr max temp: 45F
6-hr min temp: 39F
24-hr precip: none 
BHO SA 1155 E300 –OVC 80 165/45/26/3309/002/ 8/002 52027 10045 20039
 
10 A.M.
Weather: Scattered dense cirrus, thin overcast of cirrus fibratus
Temperature: 55F; Dew Point: 25F; Wind: estimated, NW at 4 kts,
Wind Speed and Direction: Light and variable
Sea-level pressure: 30.01 ins. Hg, decreasing, then more slowly
Visibility: 80 miles
BHO SA 1455 250 SCT E300 –OVC 80 161/55/25/E3204/001/ 8/004 56004
 
1 P.M. 
Weather: Few dense cirrus in all directions,
thin overcast cirrus fibratus
Temperature: 59F; Dew Point: 23F; Wind: estimated SW at 6 kts,
Wind Speed and Direction: Light and varying  S-NW
Sea-level pressure: 29.94 ins. Hg, decreasing
Visibility: 80 miles
6-hr max temp: 62F
6-hr min temp: 45F
BHO SA 1755 E300 –OVC 80 138/59/23/E2406/994/ FEW DNS CI AQLDS 
WND LGT AND VRB/ 8/004 56023 10062 20045
 
 
WEATHER SUMMARY FOR THURSDAY, APRIL 24, 2014
 
TEMPERATURE (DEGREES F)
MAX.....56    NORMAL.....59
MIN.....38    NORMAL.....41
MEAN....47    NORMAL.....50
 
DEPARTURE FROM 30-YEAR NORMAL.........................-3
TOTAL DEPARTURE FOR THE MONTH........................+49 [+1.8 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............18  DEPARTURE..........+3
TOTAL HEATING UNITS FOR THE MONTH.............417  DEPARTURE.........-51     
TOTAL HEATING UNITS FOR THE SEASON...........6044  DEPARTURE.........+92
TOTAL HEATING UNITS LAST SEASON TO DATE......5460  DIFFERENCE.......+584
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................52 NW  AT  11:57 A.M.      
                   AERO.......................N/A 
                   ASOS.......................53 NW  AT  11:56 A.M.     
                   DAVIS......................51 WNW AT   3:52 P.M. RMY 54
FASTEST MILE FOR YESTERDAY....................43 NW  AT  11:57 A.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE.................37 NW  AT  11:58 A.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE................35 NW  AT  11:59 A.M.       
AVERAGE WIND SPEED AND DIRECTION.............23.5 NW       
                   ASOS......................22.4       
                   DAVIS.....................19.8 NW [316 deg]
* last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.............-0.13
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........3.20  DEPARTURE.............-0.55      
                         ASOS..............3.19
TOTAL PRECIPITATION FOR THE YEAR..........18.32  DEPARTURE.............+0.57
                         ASOS.............18.73
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE.............. 0.0
TOTAL SNOWFALL FOR THE MONTH................0.8  DEPARTURE..............-2.1
TOTAL SNOWFALL FOR THE SEASON..............85.6  DEPARTURE.............+23.0
 
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/0.0/111/14            32 S   AERO N/A        RMY N/A
4/12 68/44/56/+11/0.00/0.0/699/88         28 W   AERO N/A        RMY 28
4/13 65/45/55/+10/0.04/0.0/215/27         35 S   AERO N/A        RMY N/A
4/14 73/55/64/+18/0.00/0.0/296/37         55 SW  AERO N/A        RMY 62
4/15 66/38/52/+5/1.22/0.0/000/00          62 S   AERO N/A        RMY 68
4/16 43/28/36/-11/0.43/0.8/.../..         39 NNW AERO N/A        RMY 39
4/17 39/29/34/-13/T/T/.../..              35 NE  AERO N/A        RMY 34
4/18 42/28/35/-13/0.00/0.0/.../..         25 E   AERO N/A        RMY 25
4/19 62/35/49/1/0.00/0.0/.../..           31 NW  AERO N/A        RMY 32
4/20 52/36/44/-5/0.00/0.0/.../..          21 E   AERO N/A        RMY 22
4/21 67/36/52/+3/0.00/0.0/.../..          25 SSW AERO N/A        RMY 26
4/22 72/44/58/+9/0.07/0.0/.../..          32 S   AERO N/A        RMY 33
4/23 52/43/48/-2/0.27/0.0/.../..          47 NW  AERO N/A        RMY 47
4/24 56/38/47/-3/0.00/0.0/.../..          52 NW  AERO N/A        RMY 54
 
4/25 morning low temp: 39F; the normal low is now 41F
 
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 25
HIGH 83 IN 2009
LOW 24 IN 1892
PRECIP 1.38 IN. IN 1901
SNOWFALL 0.7 IN. IN 2002.
PEAK GUST 66 MPH SE IN 1968
 
RECORDS FOR APRIL 26
HIGH 88 IN 2009
LOW 23 IN 1919
PRECIP 1.64 IN. IN 1931
SNOWFALL 1.0 IN. IN 2000
PEAK GUST 53 MPH SSW IN 1996
 
TODAY'S REPORT PREPARED BY: Brian Fitzgerald