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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MAY 27, 2016 
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY CLOUDY SKIES AND LOW VISIBILITY ACCOMPANY ANOTHER
DAY OF 80F DEGREE TEMPS

Temperatures were slower to warm compared to yesterday but
did reach a maximum of 81F by the 1:00PM EST observation
and had dropped to 75 at 1:00PM.  Visibility was reduced to 
only 10 miles today due to hazy conditions and light winds.
Skies were partly cloudy with high cirrus clouds.


Today's Observations:

7 A.M. 
Weather: Scattered cirrus
Temperature: 65F; Dew Point: 57F; Wind: estimated SSW at 2 kts,
Wind: Light and variable
Sea-level pressure: 30.13 ins. Hg, rising, then more quickly
Visibility: 10 miles, hazy
6-hr Max temp: 65F 
6-hr Min temp: 60F
BHO SA 1155 280 SCT 10 202/65/57/E2102/013/ HAZY WND L/V/ 
8/001 53004 10065 20060

10 A.M.
Weather: Scattered cirrus
Temperature: 77F; Dew Point: 60F; Wind: estimated S at 4 kts,
Wind: Light and variable
Sea-level pressure: 30.12 ins. Hg, falling, then more quickly
Visibility: 10 miles, hazy
BHO SA 1455 250 SCT 10 200/77/60/E1704/012/ HAZY WND L/V/ 
8/001 58002

1 P.M.
Weather: Scattered cirrocumulus, broken cirrus
Temperature: 75F; Dew Point: 60F; Wind: NE at 8 kts
Sea-level pressure: 30.09 ins. Hg, falling, then more slowly
Visibility: 10 miles, hazy
6-hr Max temp: 81F
6-hr Min temp: 65F
BHO SA 1755 220 SCT 300 BKN 10 189/75/60/0508/009/ HAZY/ 
8/001 56011 10081 20065


SUMMARY FOR THURSDAY, MAY 26, 2016 
  
TEMPERATURE (DEGREES F)
MAX.....86   NORMAL.....69
MIN.....64   NORMAL.....51 
MEAN....75   NORMAL.....60

DEPARTURE FROM 30-YEAR NORMAL.........................+15
TOTAL DEPARTURE FOR THE MONTH.........................-21 [-1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY...............0   DEPARTURE..........-6
TOTAL HEATING UNITS FOR THE MONTH.............250   DEPARTURE..........+9
TOTAL HEATING UNITS FOR THE SEASON...........5242   DEPARTURE.......-1033
TOTAL HEATING UNITS LAST SEASON TO DATE......6401   DIFFERENCE......-1159   

PEAK GUST AND AVERAGE WIND SPEED (MPH) 
PEAK WIND GUST FOR YESTERDAY...................21 SE   AT  3:14 P.M.        
                   ASOS........................21 ESE  AT  3:14 P.M.    
                   DAVIS.......................20 SE   AT  2:59 P.M. RMY 21
FASTEST MILE FOR YESTERDAY.....................15 SE   AT  2:59 P.M.                      
MAXIMUM 2-MINUTE ASOS AVERAGE..................15 SE   AT  3:01 P.M.    
MAXIMUM 2-MINUTE DAVIS AVERAGE.................15 E    AT  2:27 P.M.      
AVERAGE WIND SPEED AND DIRECTION..............8.1 NNW                   
                   ASOS.......................8.1
                   DAVIS......................7.4 SSW [200 Deg.]
* Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........2.26  DEPARTURE......-1.10
                         ASOS..............2.09
TOTAL PRECIPITATION FOR THE YEAR..........19.20  DEPARTURE......-2.71
                         ASOS.............19.51

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)  
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE........0.0
TOTAL SNOWFALL FOR THE MONTH..............TRACE  DEPARTURE........0.0
TOTAL SNOWFALL FOR THE SEASON..............57.5  DEPARTURE.......-5.7

PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO/RMY 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

5/1 52/39/46/-7/0.08/T/000/00               21 S   AERO 22 SE  RMY 20
5/2 50/41/46/-7/0.31/0.0/000/00             20 NE  AERO 21 NE  RMY 18
5/3 48/43/46/-7/0.16/0.0/000/00             16 E   AERO 16 E   RMY 17 
5/4 48/41/45/-9/0.53/0.0/000/00             33 NE  AERO 35 NE  RMY 34
5/5 44/41/43/-11/0.30/0.0/000/00            39 NNE AERO 41 NNE RMY 39
5/6 54/43/49/-5/0.13/0.0/360/42             28 ENE AERO 29 N   RMY 26
5/7 51/43/47/-8/.../0.0/000/00              25 NE  AERO 25 NE  RMY 23
5/8 60/46/53/-2/.../0.0/284/33              47 W   AERO 53 W   RMY 49         
5/9 65/43/54/-1/0.00/0.0/743/86             40 W   AERO 44 W   RMY 40
5/10 69/40/55/0/0.00/0.0/806/93             22 W   AERO 25 WNW RMY 22
5/11 76/50/63/+7/0.00/0.0/808/93            22 WNW AERO 23 WNW*RMY 22
5/12 75/54/65/+9/0.00/0.0/819/94            23 NNE AERO 25 S   RMY 23
5/13 74/52/63/+7/0.21/0.0/079/09            27 S   AERO 27 S   RMY 26  
5/14 78/54/66/+9/0.00/0.0/656/75            35 SSW*AERO 40 SSW RMY 37
5/15 60/41/51/-6/0.00/0.0/588/67            50 W   AERO 54 W   RMY 49
5/16 58/38/48/-9/0.00/0.0/800/91            45 W*  AERO 51 WNW RMY 49
5/17 69/47/58/+1/0.00/0.0/344/39            32 W   AERO 38 W   RMY 38
5/18 64/48/56/-2/0.00/0.0/804/91            24 NE  AERO 26 NNW RMY N/A
5/19 66/49/58/0/0.26/0.0/.../..             23 WNW AERO 26 WNW RMY 25 
5/20 73/46/60/+2/0.00/0.0/.../..            20 SSE AERO 22 SSE RMY 21
5/21 74/53/64/+5/0.00/0.0/.../..            21 S   AERO 23 S   RMY 21    
5/22 64/53/59/0/T/0.0/.../..                26 ENE AERO 29 ENE RMY 26
5/23 74/51/63/+4/T/0.0/.../..               22 ENE AERO 31 ENE RMY N/A            
5/24 56/50/53/-6/.../0.0/.../..             30 ENE AERO 31 ENE RMY 29
5/25 86/51/69/+9/.../0.0/.../..             25 W   AERO 28 W   RMY 25
5/26 86/64/75/+15/0.00/0.0/.../..           21 SE  AERO 23 SE  RMY 21

5/27 low temp since midnight is 60F; normal low now 51F

* Last of several occurrences
* All sunshine data corrected to astronomical minutes. 
     
DAILY RECORDS FOR MAY 2016

5/1/16: DAILY RECORD SNOWFALL OF A TRACE,
TIES PREVIOUS RECORDS SET IN 1905, 1917, 1921, and 1995

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated): 

RECORDS FOR MAY 27
HIGH 92F IN 1914
LOW 36F IN 1915
PRECIP 1.40 INS IN 1898
PEAK GUST 55 S IN 1956

RECORDS FOR MAY 28
HIGH 90F IN 1929
LOW 39F IN 1917
PRECIP 2.48 INS 1906
PEAK GUST 51e MPH NE IN 1946

TODAY'S REPORT PREPARED BY: Cece Borries-Strigle