BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MAY 1, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
 
UNSEASONABLE COLD FINALLY BREAKS WITH OVERNIGHT WARM UP,
RAIN AND FOG 
 
April wrapped up overnight with rain falling heavily at times.
Rainfall from 7:00 AM yesterday throughout 7:00 AM EST totaled
0.84 inches, with another 0.01 inches falling before 10:00 AM.
 
Fog has stayed in place for most of this morning and into the
early afternoon with visibility being reduced to 1/4 mile at
times.
 
Stay tuned for preliminary monthly statistics for April.
 
 
Today's Observations:
 
7 A.M.
Weather: Thick fog and light rain 
Temperature: 57F; Dew Point: 57F; Wind: S at 15G20 kts,
Sea-level pressure: 29.87 ins. Hg, falling, then more slowly 
Visibility: 1/4 mile, 1/2 mile SE-W, obscured by fog and rain
6-hr max temp: 57F
6-hr min temp: 46F 
24-hr precip: 0.84 in.
BHO SA 1155 W3 X 1/4R-F 114/57/57/1715G20/987/ VSBY SE-W 1/2 MI/
8//// 56026 ASOS 60045 70085 MANUAL 70084 10057 20046  
 
10 A.M.
Weather: Thick fog
Temperature: 58F; Dew Point: 58F; Wind: S at 11G17 kts,
Sea-level pressure: 29.80 ins. Hg, falling, then more quickly
Visibility: 1/4 mile, obscured by thick fog
3-hr precip: 0.01 in.
BHO SA 1455 W2 X 1/4F 090/58/58/1811G17/980/ 8//// 58024 
ASOS 60002 MANUAL 60001  
 
1 P.M. 
Weather: Fog
Temperature: 57F; Dew Point: 55F; Wind: estimated W at 3 kts
Wind Speed: Light
Sea-level pressure: 29.79 ins. Hg, falling, then more quickly
Visibility: 1/2 mile, obscured by fog 
6-hr max temp: 59F
6-hr min temp: 56F
6-hr precip: 0.01 in.  
BHO SA 1755 W2 X 1/2F 089/57/55/E2603/979/ WND LGT/ 8//// 56010 
6001/ 10059 20056
 
WEATHER SUMMARY FOR WEDNESDAY, APRIL 30, 2014
 
TEMPERATURE (DEGREES F)
MAX.....44    NORMAL.....61
MIN.....38    NORMAL.....43
MEAN....41    NORMAL.....52
 
DEPARTURE FROM 30-YEAR NORMAL........................-11
TOTAL DEPARTURE FOR THE MONTH.........................+4 [-0.1 DEGREE/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............24  DEPARTURE.........+11
TOTAL HEATING UNITS FOR THE MONTH.............544  DEPARTURE..........-7     
TOTAL HEATING UNITS FOR THE SEASON...........6171  DEPARTURE........+136
TOTAL HEATING UNITS LAST SEASON TO DATE......5522  DIFFERENCE.......+649
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................25  ESE AT   7:30 P.M.     
                   AERO.......................N/A 
                   ASOS.......................25  ESE AT   7:27 P.M.        
                   DAVIS......................25  ESE AT   7:28 P.M.  RMY N/A
FASTEST MILE FOR YESTERDAY....................19  E   AT   7:27 P.M.      
MAXIMUM 2-MINUTE ASOS AVERAGE.................20  E   AT   7:28 P.M.       
MAXIMUM 2-MINUTE DAVIS AVERAGE................18  E   AT   7:28 P.M.      
AVERAGE WIND SPEED AND DIRECTION............12.1  E 
                   ASOS.....................11.7     
                   DAVIS....................10.6  E [96 deg]
* last  of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.84  DEPARTURE.............+0.72
                         ASOS..............0.85
TOTAL PRECIPITATION FOR THE MONTH..........0.84  DEPARTURE.............+0.72      
                         ASOS..............0.85
TOTAL PRECIPITATION FOR THE YEAR..........19.60  DEPARTURE.............+0.93
                         ASOS.............19.99
 
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..............-2.2
TOTAL SNOWFALL FOR THE SEASON..............85.6  DEPARTURE.............+22.9
 
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 TSTM
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 44/39/42/-9/..../0.0/.../..          18 E   AERO N/A        RMY 18
4/27 46/38/42/-9/..../0.0/.../..          21 NW  AERO N/A        RMY 23      
4/28 56/36/46/-6/T/0.0/.../..             31 ENE AERO N/A        RMY 33
4/29 42/38/40/-12/T/0.0/.../..            32 ENE AERO N/A        RMY 35     
4/30 44/38/41/-11/..../0.0/.../..         25 ESE AERO N/A        RMY N/A
 
5/1 morning low temp: 40F; the normal low is now 43F 
 
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 MAY 1
HIGH 87F IN 1899
LOW 29F IN 1978
PRECIP 2.53 INCHES IN 1921
SNOWFALL TRACE IN 1905,1917,1921,1995
PEAK GUST 57 MPH NW IN 1974
 
RECORDS FOR MAY 2
HIGH 92F IN 2001
LOW 29F IN 1903
PRECIP 1.36 INCHES IN 2006
SNOWFALL 1.0 INS IN 1888
PEAK GUST 58 MPH S IN 1983
 
TODAY'S REPORT PREPARED BY: Brian Fitzgerald