BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, MAY 5, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
 
MOSTLY CLOUDY AND BREEZY ONCE AGAIN
 
Cumulus and stratocumulus cleared out overnight and built
back in again today keeping skies above mostly cloudy
throughout most of the morning. Showers have been less of
a concern than yesterday with only a few showers popping up
on radar by early afternoon.
 
By 1:00 PM EST stratocumulus and cumulus were still the
dominating cloud type with some showers visible and distant
to the NE-ENE and SE. Visibility was 80 miles in most directions
and a maximum of 64F had been reached so far.
 
APRIL 2014 PRELIMINARY STATISTICS
 
[Departures are relative to the 1981-2010 averages]
 
TEMPERATURE: Deg. F
Avg. Max. 55.9 [+0.2]
Avg. Min. 37.5 [-0.2]
Mean      46.7 [0.0]
24-hr. corrected mean: 46.1
Max. temp: 73 on the 14th
Min. temp: 28 on the 16th and 18th
Total heating degree day units: 544 [-7]
Total seasonal heating units:  6,171  [+136]
[Season starts 7/1]
Seasonal total this date 2012: 5,522 [+649]
 
PRECIPITATION: Inches
Total: 4.00 [-0.55]
Greatest in 24 hours: 1.22 inches on the 15th
Total snowfall: 0.8 inches
Greatest in 24 hours:  0.8 inches on the 16th
 
WIND
Av. speed (uncorrected): 13.6 mph
Av. speed (corrected):   13.9 mph
Prevailing direction: NW @ 13% possible
 
SUNSHINE
Total astronomical minutes: 11,946 of possible 24,094 or 50%
Total Campbell-Stokes card minutes; 11,508 of possible 23,250 or 49%
 
Today's Observations:
 
7 A.M.
Weather: Broken stratocumulus, broken altocumulus lenticularis,
broken cirrus fibratus
Temperature: 54F; Dew Point: 41F; Wind: NW at 15G20 kts
Sea-level pressure: 29.75 ins. Hg, rising, then more slowly
Visibility: 80 miles
6-hr max temp: 54F
6-hr min temp: 46F
24-hr precip: 0.01 inches
BHO SA 1155 E45 BKN 50 BKN 250 BKN 80 076/54/41/3115G20/975/
ACSL DSNT ALQDS/ 8/541 51024 MANUAL 70001 10054 20046
 
10 A.M.
Weather: Broken stratocumulus, broken altocumulus lenticularis,
broken cirrus fibratus
Temperature: 59F; Dew Point: 39F; Wind: NW at 15G22 kts,
Sea-level pressure: 29.78 ins. Hg, rising, then more slowly
Visibility: 80 miles
BHO SA 1455 E36 BKN 45 BKN 250 BKN 80 083/59/39/3115G22/978/
ACSL DSNT ALQDS/ 8/541 51007
 
1 P.M. 
Weather: Scattered stratocumulus, scattered altocumulus,
broken cirrus fibratus, showers distant NE-ENE and SE
Temperature: 62F; Dew Point: 38F; Wind: NW at 12G22 kts,
Sea-level pressure: 29.78 ins. Hg, increasing then decreasing,
but still higher
Visibility: 60 miles
6-hr max temp: 64F
6-hr min temp: 54F   
BHO SA 1755 55 SCT 70 SCT E250 BKN 80 084/62/38/3212G22/978/
SHWRS DSNT NE-ENE AND SE/ 8/561 50001 10064 20054
 
WEATHER SUMMARY FOR SUNDAY, MAY 4, 2014
 
TEMPERATURE (DEGREES F)
MAX.....60    NORMAL.....63
MIN.....47    NORMAL.....44
MEAN....54    NORMAL.....54
 
DEPARTURE FROM 30-YEAR NORMAL........................+/-0
TOTAL DEPARTURE FOR THE MONTH.........................+12 [+2.8 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY..............11  DEPARTURE..........-1
TOTAL HEATING UNITS FOR THE MONTH..............35  DEPARTURE.........-14     
TOTAL HEATING UNITS FOR THE SEASON...........6206  DEPARTURE........+111
TOTAL HEATING UNITS LAST SEASON TO DATE......5571  DIFFERENCE.......+635
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................51 WNW  AT  5:10 P.M. *
                   ASOS.......................54 W    AT  2:27 P.M.
                   DAVIS......................52 W    AT  3:39 P.M.  RMY 54
FASTEST MILE FOR YESTERDAY....................40 W    AT  3:39 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE.................38 W    AT  3:40 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE................35 W    AT  3:40 P.M.
AVERAGE WIND SPEED AND DIRECTION............18.9  WNW      
                   ASOS.....................17.7    
                   DAVIS....................16.1  W [267 deg]
* Last of several occurrences...
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.01  DEPARTURE.............-0.12
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........0.50  DEPARTURE.............+0.00      
                         ASOS..............0.51
TOTAL PRECIPITATION FOR THE YEAR..........19.62  DEPARTURE.............+0.57
                         ASOS.............20.04
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE...............0.0
TOTAL SNOWFALL FOR THE MONTH................0.0  DEPARTURE...............0.0
TOTAL SNOWFALL FOR THE SEASON..............85.6  DEPARTURE.............+22.9
 
PRELIMINARY CLIMATE SUMMARY FOR APRIL-MAY 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/+4/0.00/0.0/452/59          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/-2/0.27/0.0/0/0             47 NW  AERO N/A        RMY 47 TSTM
4/24 56/38/47/-3/0.00/0.0/810/98          52 NW  AERO N/A        RMY 54
4/25 64/39/52/+2/0.00/0.0/721/87          25 S   AERO N/A        RMY 25
4/26 44/39/42/-9/..../0.0/0/0             18 E   AERO N/A        RMY 18
4/27 46/38/42/-9/..../0.0/8/1             21 NW  AERO N/A        RMY 23      
4/28 56/36/46/-6/T/0.0/326/39             31 ENE AERO N/A        RMY 33
4/29 42/38/40/-12/T/0.0/0/0               32 ENE AERO N/A        RMY 35     
4/30 44/38/41/-11/0.37/0.0/0/0            25 ESE AERO N/A        RMY N/A
 
5/1  64/43/54/+1/0.49/0.0/.../..          32 SSE RMY 36
5/2  68/51/60/+7/T/0.0/.../..             28 W   RMY 29
5/3  66/48/57/+4/..../0.0/.../..          21 SW  RMY N/A 
5/4  60/47/54/0/0.01/0.0/.../..           51 WNW RMY 54
 
5/5 morning low temp: 46F; the normal low is now 45F 
 
DAILY RECORDS FOR APRIL 2014
4/14 - Minimum temperature of 55F EQUALS RECORD HIGH
MINIMUM FOR THIS DATE SET IN 1909.
 
DAILY RECORDS FOR MAY 2014
None so far.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):    
 
RECORDS FOR MAY 5
HIGH 92F IN 1949
LOW 30F IN 1891
PRECIP 2.74 INCHES IN 1922
SNOWFALL 3.0 INCHES IN 1917
PEAK GUST 58 MPH S IN 1966 & 58e MPH SW IN 1976
 
RECORDS FOR MAY 6
HIGH 90F IN 1930
LOW 29F IN 1891
PRECIP 1.04 INCHES IN 1890
SNOWFALL TRACE IN 1917,1996
PEAK GUST 65 MPH SSE IN 1989
 
TODAY'S REPORT PREPARED BY: Brian Fitzgerald