BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, APRIL 26, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
 
RAINY AND COLD TODAY WITH A LOW PASSING TO OUR SOUTH
 
Today has been a cool, wet, raw day on the summit.  A developing low pressure
to our south brought a steady light rain that began around 8:00 EDT this
morning.  The rain was steady for several hours but has decreased in intensity
towards noontime, with just light rain falling early this afternoon.  So
far, 0.28 inches of rain have been measured from this system.  Besides the
rain, the unseasonably cool temperatures have been the big story today.  Our
high for the day so far is 44F, which occurred just before the rain began.
Since then, the temperature has been stuck in the lower 40s, with 42F being
the reading at the 1:00 P.M. observation.  The average high for this time of
year is now up to 60F.
 
The wind has been light today, but the steady easterly component to the
direction has helped to provide the raw feeling of the air today, with the
air coming in off the cool ocean.  Some bright spots were observed to the
east early this morning, but no sunshine has been recorded today.
Visibility, which was at 35 miles this morning, fell under a mile at times
during the steadier rain and has remained at or below 20 miles into the early
afternoon.
 
Today's Observations:
 
7 A.M.
Weather: Scattered stratocumulus, overcast altostratus, few altocumulus
distant offshore NNE-E, rain shower S-SW, thin smoke layer above horizon
NW-NNE
Temperature: 44F; Dew Point: 38F; Wind: Estimated NNE at 5 kts,
Wind: Light
Sea-level pressure: 29.82 ins. Hg, rising slightly then steady
Visibility: 35 miles
6-hr max temp: 44F
6-hr min temp: 42F
BHO SA 1155 35 SCT E80 OVC 35 098/44/38/E0305/982/ FEW AC DSNT OFFSHR NNE-E
SHRA S-SW THN K LYR ABV HRZN NW-NNE WND LGT/ 8/57/ 51001 10044 20042
 
10 A.M.
Weather: Sky obscured by light rain and fog, few stratus fractus drifting
below the summit
Temperature: 41F; Dew Point: 41F; Wind: E at 8 kts
Sea-level pressure: 29.81 ins. Hg, steady then falling slightly
Visibility: 1/8 miles, light rain and fog
3-hr precip: 0.15 inches
BHO SA 1455 W3 X 1/8R-F 095/41/41/1008/981/ FEW STFRA DRFTNG BLO SMT/ 8///
58003 MANUAL 60015 ASOS 60014
 
1 P.M. 
Weather: Light rain, broken stratus fractus, overcast nimbostratus, few stratus 
fractus drifting below the summit W-NE
Temperature: 42F; Dew Point: 40F; Wind: ENE at 6 kts
Sea-level pressure: 29.80 ins. Hg, falling slightly
Visibility: 20 miles, except 10 miles NW-NE
6-hr max temp: 44F
6-hr min temp: 41F
6-hr precip: 0.28 inches
BHO SA 1755 E20 BKN 45 OVC 20R- 090/42/40/0706/980/ FEW STFRA DRFTNG BLO SMT
W-NE VSBY NW-NE 10/ 8/72/ 58005 MANUAL 60028 ASOS 60027 10044 20041
 
 
WEATHER SUMMARY FOR FRIDAY, APRIL 25, 2014
 
TEMPERATURE (DEGREES F)
MAX.....64    NORMAL.....60
MIN.....39    NORMAL.....41
MEAN....52    NORMAL.....50
 
DEPARTURE FROM 30-YEAR NORMAL.........................+2
TOTAL DEPARTURE FOR THE MONTH........................+51 [+1.8 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............13  DEPARTURE..........-2
TOTAL HEATING UNITS FOR THE MONTH.............430  DEPARTURE.........-53     
TOTAL HEATING UNITS FOR THE SEASON...........6057  DEPARTURE.........+91
TOTAL HEATING UNITS LAST SEASON TO DATE......5471  DIFFERENCE.......+586
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................25  S  AT  5:03 P.M.      
                   AERO.......................N/A 
                   ASOS.......................25  S  AT  5:23 P.M.     
                   DAVIS......................24  S  AT  5:03 P.M.  RMY 25
FASTEST MILE FOR YESTERDAY....................19  S  AT  5:03 P.M.  
MAXIMUM 2-MINUTE ASOS AVERAGE.................21  S  AT  5:05 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE................20  S  AT  5:04 P.M.       
AVERAGE WIND SPEED AND DIRECTION.............10.8 NW       
                   ASOS......................10.2      
                   DAVIS.....................9.6  W [255 deg]
 
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.............-0.68      
                         ASOS..............3.19
TOTAL PRECIPITATION FOR THE YEAR..........18.32  DEPARTURE.............+0.44
                         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/-11/0.43/0.8/757/94         39 NNW AERO N/A        RMY 39
4/17 39/29/34/-13/T/T/566/70              35 NE  AERO N/A        RMY 34
4/18 42/28/35/-13/0.00/0.0/016/02         25 E   AERO N/A        RMY 25
4/19 62/35/49/1/0.00/0.0/732/90           31 NW  AERO N/A        RMY 32
4/20 52/36/44/-5/0.00/0.0/783/96          21 E   AERO N/A        RMY 22
4/21 67/36/52/+3/0.00/0.0/778/95          25 SSW AERO N/A        RMY 26
4/22 72/44/58/+9/0.07/0.0/427/52          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 64/39/52/+2/0.00/0.0/.../..          25 S   AERO N/A        RMY 25
 
4/26 morning low temp: 41F; 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 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
 
RECORDS FOR APRIL 27
HIGH 93 IN 1990
LOW 28 IN 1919
PRECIP 1.89 IN 1979
SNOWFALL 2.7 IN. IN 1993
PEAK GUST 65e MPH N IN 1941
 
TODAY'S REPORT PREPARED BY: Jonathan O'Brien