BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MAY 28, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME
 
VERY WARM AND HUMID AGAIN TODAY WITH SUNSHINE
 
Temperatures rising into 80’s for the 5th consecutive
day today. Dew points rise to mid 60's. May continues
as one of the driest on record with only 0.63 inches
measured through this morning. 
 
BHO Driest Mays, inches (1885-2014)
 
1) 0.50 in 1944
2) 0.62 in 1964
3) 0.89 in 1911
4) 1.11 in 1899
5) 1.20 in 1959
 
 
Today's Observations:

7 A.M.
Weather: Scattered stratus dissipating, broken altocumulus,
broken cirrus [2 levels) thin fog
Temperature: 65F; Dew Point: 62F; Wind: S at 10 kts
Sea-level pressure: 30.17 ins. Hg, rising, then more slowly
Visibility: 8 miles, except 6 miles NE-SE, 5 miles SE-S
6-hr Max temp: 66F
6-hr Min temp: 61F
24-hr precip: trace
BHO SA 1155 8 SCT 140 SCT 220 BKN 250 BKN 8 216/65/62/1910/017/
STRA DCRSNG PST HR LYR 250 PTLY THN VSBY N 10 NE-E 6 SE-S 5
THN F ALQDS/ MANUAL 70000 8/631 51013 10066 20061    
 
10 A.M.
Weather: Scattered altocumulus of chaotic sky, thin broken
cirrostratus W  
Temperature: 73F; Dew Point: 64F; Wind: S at 15 kts
Sea-level pressure: 30.16 ins. Hg, falling slightly
Visibility: 15 miles, except 20 miles WNW, hazy all quadrants 
BHO SA 1455 E150 BKN 300 -BKN 15 214/73/64/1915/016/ AC CHAOTIC/
THN CS W VSBY WNW 20 HAZY ALQDS/ 8/098 56002
 
SUMMARY FOR WEDNESDAY, MAY 27, 2015
  
TEMPERATURE (DEGREES F)
MAX.....82   NORMAL.....69
MIN.....62   NORMAL.....51
MEAN....72   NORMAL.....60

DEPARTURE FROM 30-YEAR NORMAL.......................+12
TOTAL DEPARTURE FOR THE MONTH......................+132 [+4.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0  DEPARTURE...........-6
TOTAL HEATING UNITS FOR THE MONTH.............130  DEPARTURE.........-116
TOTAL HEATING UNITS FOR THE SEASON...........6401  DEPARTURE.........+120
TOTAL HEATING UNITS LAST SEASON TO DATE......6341  DIFFERENCE.........+60

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY..............7   DEPARTURE..........+6
TOTAL COOLING UNITS FOR THE MONTH.............34   DEPARTURE.........+17
TOTAL COOLING UNITS FOR THE SEASON............34   DEPARTURE.........+15
TOTAL COOLING UNITS LAST SEASON TO DATE.......21   DIFFERENCE........+13

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY..................36  SSW  AT   6:36 P.M. *          
                   ASOS.......................40  S    AT   4:15 P.M.            
                   DAVIS......................39  SSW  AT   4:35 P.M. RMY 41
FASTEST MILE FOR YESTERDAY....................31  SSW  AT   5:37 P.M.   
MAXIMUM 2-MINUTE ASOS AVERAGE.................32  SSW  AT   5:37 P.M.            
MAXIMUM 2-MINUTE DAVIS AVERAGE................32  SSW  AT   5:37 P.M.     
AVERAGE WIND SPEED AND DIRECTION.............18.1 SSW   
                   ASOS......................18.2    
                   DAVIS.....................16.9 SSW [200 deg.] 
* Last of several occurrences...

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....Trace DEPARTURE.....-0.15
                         ASOS...............0.00
TOTAL PRECIPITATION FOR THE MONTH...........0.63  DEPARTURE.....-2.88
                         ASOS...............0.63
TOTAL PRECIPITATION FOR THE YEAR...........18.55  DEPARTURE.....-3.38
                         ASOS................N/A ***
*** ASOS annual totals not available due to erroneous readings

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..............150.8  DEPARTURE....+88.1

PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/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  52/37/45/-8/0.00/0.0/354/42               21 NE  RMY 20
5/2  63/35/49/-4/0.00/0.0/668/79               20 S   RMY 20
5/3  74/44/59/+6/0.00/0.0/509/60               22 S   RMY 22
5/4  83/47/65/+11/0.00/0.0/783/92              39 SSW RMY 45
5/5  77/56/67/+13/0.03/0.0/222/26              29 SW  RMY N/A
5/6  74/54/64/+10/0.00/0.0/574/67              24 SSW RMY 25
5/7  84/52/68/+13/0.00/0.0/824/96              29 S   RMY 32
5/8  74/44/59/+4/0.00/0.0/809/94               27 NNE RMY 26
5/9  77/44/61/+6/0.00/0.0/509/59               30 S   RMY 32
5/10 88/60/74/+19/0.00/0.0/692/80              28 SSW RMY 30
5/11 84/48/66/+10/0.00/0.0/529/61              30 NE  RMY 31
5/12 84/47/66/+10/0.24/0.0/287/33              33 WNW RMY 37
5/13 67/47/57/+1/0.00/0.0/820/94               31 WNW RMY N/A
5/14 70/44/57/+0/0.00/0.0/848/97               22 NW  RMY 22
5/15 73/51/62/+5/0.00/0.0/491/56               20 WSW RMY 21
5/16 68/53/61/+4/T/0.0/053/06                  23 S   RMY 24
5/17 79/50/65/+8/T/0.0/783/89                  21 NE  RMY N/A
5/18 62/48/55/-3/..../0.0/538/61               25 NE  RMY N/A
5/19 63/50/57/-1/0.36/0.0/000/00               24 S   RMY 26
5/20 66/46/56/-2/0.00/0.0/.../..               32 WNW RMY 37
5/21 66/43/55/-4/..../0.0/.../..               24 S   RMY 24
5/22 73/49/61/+2/T/0.0/.../..                  32 NW  RMY 36
5/23 64/40/52/-7/0.00/0.0/.../..               28 WNW RMY 32
5/24 81/50/66/+7/0.00/0.0/.../..               28 SSW RMY 31
5/25 80/56/68/+8/0.00/0.0/.../..               29 SSW RMY 31
5/26 83/61/72/+12/0.00/0.0/.../..              30 SSW RMY N/A
5/27 82/62/72/+12/T/0.0/.../..                 36 SSW RMY 41
 
5/28 low since midnight is 61F; normal low is now 51F

DAILY RECORDS FOR MAY 2015

NONE SO FAR.

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR MAY 28
HIGH 90F IN 1929
LOW 39F IN 1917
PRECIP 2.48 INS 1906
PEAK GUST 51e MPH NE IN 1946
 
RECORDS FOR MAY 29
HIGH 93F IN 1919
LOW 35F IN 1902
PRECIP 1.63 INS 1990
PEAK GUST 55e MPH NNW IN 1943, WNW IN 1945
 
TODAY'S REPORT PREPARED BY: Robert Skilling