BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, MAY 19, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
 
CLEAR START TO MONDAY WITH CLOUDS AND SPOTTY SHOWERS
MOVING INTO THE REGION THIS AFTERNOON
 
Skies were clear and nearly cloudless by 7:00 AM EST this morning,
with visibilities of 60 miles in all directions. Some cumulus were
seen distant WNW-N on the horizon slowly moving toward the station.
 
By 1:00 PM EST showers were approaching the station and were distant
to the NW with virga visible in all directions. Barometric pressure
had continued to drop since prior to the 10:00 AM EST observation
with temperatures topping out at 65F so far.
 
Light rain showers began at the station at 1:22 PM EST with winds
gusting to nearly 30 MPH from the WNW.
 
Today's Observations:
 
7 A.M.
Weather: Clear, few cumulus distant WNW-N
Temperature: 54F; Dew Point: 33F; Wind: WNW at 10G19 kts
Sea-level pressure: 30.08 ins. Hg, rising then falling, but higher
Visibility: 60 miles, light distant haze in all directions 
6-hr max temp: 54F
6-hr min temp: 47F
24-hr precip: None
BHO SA 1155 CLR 60 187/54/33/3010G19/008/
FEW CU DSNT WNW-N LGT DSNT HZ ALQDS/ 8/100 50004 10054 20047
 
10 A.M.
Weather: Scattered cumulus, scattered altocumulus
Temperature: 62F; Dew Point: 35F; Wind: NNW at 10G17 kts,
Sea-level pressure: 30.05 ins. Hg, falling, then more quickly
Visibility: 60 miles, light distant haze in all directions 
BHO SA 1455 50 SCT 80 SCT 60 177/62/35/3310G17/005/ LGT DSNT HZ ALQDS/
8/160 58010
 
1 P.M. 
Weather: Scattered stratocumulus, broken stratus/nimbostratus,
broken altocumulus, showers distant NW, virga distant in all
directions
Temperature: 62F; Dew Point: 31F; Wind: WNW at 10G18 kts,
Sea-level pressure: 30.02 ins. Hg, falling then falling more rapidly
Visibility: 50 miles, 35 miles NW, obscured by distant showers and virga
6-hr max temp: 65F
6-hr min temp: 54F
BHO SA 1755 45 SCT E80 BKN 120 BKN 50 165/62/31/3010G18/002/
SHWRS DSNT NW VIRGA DSNT ALQDS VSBY NW 35 MI/ 8/420 58012 10065 20054
 
WEATHER SUMMARY FOR SUNDAY, MAY 18, 2014
 
TEMPERATURE (DEGREES F)
MAX.....67    NORMAL.....67
MIN.....47    NORMAL.....48
MEAN....57    NORMAL.....58
 
DEPARTURE FROM 30-YEAR NORMAL..........................-1
TOTAL DEPARTURE FOR THE MONTH.........................+70 [+3.7 DEGREES/DAY]
 
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............8  DEPARTURE........+/-0
TOTAL HEATING UNITS FOR THE MONTH.............118  DEPARTURE.........-67     
TOTAL HEATING UNITS FOR THE SEASON...........6289  DEPARTURE.........+69     
TOTAL HEATING UNITS LAST SEASON TO DATE......5668  DIFFERENCE.......+621
 
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............0   DEPARTURE..........-1
TOTAL COOLING UNITS FOR THE MONTH.............13   DEPARTURE..........+6
TOTAL COOLING UNITS FOR THE SEASON............13   DEPARTURE..........+4
TOTAL COOLING UNITS LAST SEASON TO DATE........3   DIFFERENCE.........+10
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................20  NW   AT  11:47 P.M.   
                   ASOS.......................20  NW   AT  11:47 P.M.    
                   DAVIS......................19  WNW  AT  4:25 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY....................15  NW   AT  5:07 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE.................16  NW   AT  5:08 A.M.  
MAXIMUM 2-MINUTE DAVIS AVERAGE................N/A 
AVERAGE WIND SPEED AND DIRECTION.............7.9 NW        
                   ASOS......................7.3    
                   DAVIS.....................7.0 NW [320 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..........1.96  DEPARTURE.............-0.25      
                         ASOS..............1.99
TOTAL PRECIPITATION FOR THE YEAR..........21.08  DEPARTURE.............+0.32
                         ASOS.............21.52
 
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 MAY 2014 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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
 
5/1  64/43/54/+1/0.49/0.0/093/11          32 SSE RMY 36
5/2  68/51/60/+7/T/0.0/457/54             28 W   RMY 29
5/3  66/48/57/+4/0.00/0.0/332/39          21 SW  RMY N/A 
5/4  60/47/54/0/0.01/0.0/400/47           51 WNW RMY 54
5/5  64/46/55/+1/T/0.0/592/70             30 NW  RMY 32
5/6  63/42/53/-1/T/0.0/506/59             30 NW  RMY 30
5/7  64/42/55/0/0.00/0.0/850/99           21 WNW RMY 23
5/8  69/48/59/+4/0.00/0.0/612/71          17 SSW RMY 19
5/9  57/51/54/-1/0.05/0.0/000/00          21 S   RMY N/A 
5/10 78/57/68/+13/0.10/0.0/043/05         33 S   RMY 37
5/11 79/58/69/+13/0.01/0.0/746/86         30 W   RMY N/A
5/12 85/49/67/+11/0.00/0.0/792/91         39 NE  RMY 42
5/13 54/42/48/-8/0.00/0.0/113/13          32 NE  RMY N/A
5/14 73/42/58/+1/T/ 0.0/613/70            22 S   RMY 24
5/15 77/57/67/+10/T/0.0/140/16            27 S   RMY 33
5/16 73/60/67/+10/..../0.0/.../..         36 S   RMY 41
5/17 74/52/63/+6/..../0.0/.../..          36 SSE RMY N/A
5/18 67/47/57/-1/0.00/0.0/.../..          20 NW  RMY N/A
 
5/19 morning low temp: 47F; the normal low is now 49F
 
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 19
HIGH 91F IN 1962
LOW 34F IN 2002
PRECIP 1.54 INCHES IN 1900
PEAK GUST 58 MPH NW IN 1964
 
RECORDS FOR MAY 20
HIGH 91F IN 1975,1996
LOW 37F IN 1948, 2002
PRECIP 1.65 INCHES IN 1969
PEAK GUST 57 MPH S IN 1963, WNW IN 1982
 
TODAY'S REPORT PREPARED BY: Brian Fitzgerald