Friday, June 3, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, JUNE 3, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

OVERCAST SKIES WITH HIGH HUMIDITY AND CALM WINDS

Skies were overcast all morning and early afternoon, but
the ceiling was lifting with afternoon warming.  A brief rain
shower occurred before the 10:00AM EST observation giving a trace
of precipitation for the day so far.

Wind direction switched to out of the south last evening and
remained light for most of the day.  Temperatures were slow to rise.
The maximum by 1:00PM was only 66F.

PRELIMINARY STATS FOR MAY 2016

TEMPERATURE, Deg. F
Avg. Max. 66.9 [+0.6] Avg. Min. 48.8 [+1.0] Mean      57.9 [+0.8] 24-hour corrected mean: 57.2
Max. for month: 92 on 28th
Min. for month: 38 on 16th

HEATING DEGREE DAYS
Total heating units: 256 [-12] Total for the season: 5248 [-1055] Total for last season: 6404

PRECIPITATION, Inches
Total: 3.13 [-0.98] Greatest in 24 hrs: 0.94 in. on 30th

SNOWFALL, Inches
Total: T [+0.0] Greatest in 24 hrs: T on 1st

WIND, mph
Avg. uncorrected wind speed: 10.7
Avg. corrected wind speed: 11.3
Prevailing wind direction: W at 15%
Peak gust and direction: 50 W on 15th

SUNSHINE:
Campbell-Stokes card minutes: 12390 mins. of possible 26226 or 47%
Astronomical total minutes: 12842 mins. of possible 27208 or 47%

Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 60F; Dew Point: 55F; Wind: estimated SSE at 1 kt,
Wind: Light and variable
Sea-level pressure: 30.10 ins. Hg, falling, then rising
Visibility: 20 miles, distant fog
6-hr Max temp: 60F
6-hr Min temp: 57F
24-hr precip: 0.00 in.
BHO SA 1155 E6 OVC 20 192/60/55/E1601/010/ FEW CU NNW-NNE VSBY NNW-NNE 10
DSNT FG WND L/V/ 8/6// 53001 10060 20057

10 A.M.
Weather: Overcast stratus
Temperature: 63F; Dew Point: 57F; Wind: estimated S at 2 kts,
Wind: Light and variable
Sea-level pressure: 30.08 ins. Hg, falling, then rising
Visibility: 20 miles, distant fog
3-hr precip: Trace
BHO SA 1455 E11 OVC 20 187/63/57/E1802/008/ DSNT FG WND L/V/
8/6// 55005 MANUAL 6000/

1 P.M.
Weather: Broken stratocumulus, overcast altostratus
Temperature: 66F; Dew Point: 60F; Wind: S at 7 kts
Sea-level pressure: 30.06 ins. Hg, falling, then more quickly
Visibility: 15 miles, distant fog
6-hr Max temp: 66F
6-hr Min temp: 59F
6-hr precip: Trace
BHO SA 1755 E39 BKN 160 OVC 15 179/66/60/1807/006/ DSNT FG/
8/52/ 58008 MANUAL 6000/ 10066 20059

SUMMARY FOR THURSDAY, JUNE 2, 2016

TEMPERATURE (DEGREES F)
MAX…..68   NORMAL…..71
MIN…..54   NORMAL…..53
MEAN….61   NORMAL…..62

DEPARTURE FROM 30-YEAR NORMAL…………………….-1
TOTAL DEPARTURE FOR THE MONTH…………………….+0 [+0.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………4   DEPARTURE……….+2
TOTAL HEATING UNITS FOR THE MONTH……………6   DEPARTURE……….-4
TOTAL HEATING UNITS FOR THE SEASON………..5254   DEPARTURE…….-1058
TOTAL HEATING UNITS LAST SEASON TO DATE……6441   DIFFERENCE……-1187

COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………0   DEPARTURE……….-2
TOTAL COOLING UNITS FOR THE MONTH……………0   DEPARTURE……….-3
TOTAL COOLING UNITS FOR THE SEASON………….48   DEPARTURE………+21
TOTAL COOLING UNITS LAST SEASON TO DATE……..49   DIFFERENCE………-1

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….21 NE   AT  3:17 P.M.
ASOS……………………22 NE   AT  3:18 P.M.
DAVIS…………………..20 NE   AT  5:53 P.M. RMY 21
FASTEST MILE FOR YESTERDAY…………………15 ESE  AT  6:16 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………16 ESE  AT  6:17 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..15 E    AT  3:21 P.M.
AVERAGE WIND SPEED AND DIRECTION………….8.4 NE
ASOS………………….8.5
DAVIS…………………7.5 ENE [070 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE……-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.00  DEPARTURE……-0.33
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….20.07  DEPARTURE……-2.92
ASOS………….20.44

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/-9/0.46/0.0/000/00             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/-8/0.06/0.0/000/00             25 NE  AERO 25 NE  RMY 23
5/8 60/46/53/-2/0.10/0.0/284/33             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/T/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 66/49/58/0/0.26/0.0/283/32             23 WNW AERO 26 WNW RMY 25
5/20 73/46/60/+2/0.00/0.0/798/90            20 SSE AERO 22 SSE RMY 21
5/21 74/53/64/+5/0.00/0.0/587/66            21 S   AERO 23 S   RMY 21
5/22 64/53/59/0/T/0.0/320/26                26 ENE AERO 29 ENE RMY 26
5/23 74/51/63/+4/T/0.0/491/55               22 ENE AERO 31 ENE RMY N/A
5/24 56/50/53/-6/0.12/0.0/000/00            30 ENE AERO 31 ENE RMY 29  TSTM
5/25 86/51/69/+9/0.00/0.0/635/71            25 W   AERO 28 W   RMY 25
5/26 86/64/75/+15/0.00/0.0/610/68           21 SE  AERO 23 SE  RMY 21
5/27 81/60/71/+11/0.00/0.0/548/61           26 S   AERO 30 S   RMY 29
5/28 92/63/78/+17/0.00/0.0/711/79           22 SSW AERO 22 SSW RMY N/A
5/29 72/51/62/+1/0.00/0.0/009/01            18 NE  AERO 20 NE  RMY 18
5/30 71/52/62/+1/0.94/0.0/000/00            25 SSW AERO 28 SSW RMY 27
5/31 84/67/76/+15/0.00/0.0/750/83           25 W   AERO 29 WSW RMY 28

6/1 71/54/63/+1/0.00/…/..                 26 NE  AERO 30 NE  RMY N/A
6/2 68/54/61/-1/0.00/…/..                 28 NE  AERO 22 NE  RMY 21

6/3 low temp since midnight is 57F; normal low now 53F

* Last of several occurrences

DAILY RECORDS FOR MAY 2016

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

5/28/16: DAILY RECORD MAXIMUM TEMP. OF 92F,
PREVIOUS RECORD OF 90F SET IN 1914

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

RECORDS FOR JUNE 3
HIGH 98F IN 1919
LOW 38F IN 1929
PRECIP 2.40 INS 2006
PEAK GUST 47 MPH NW IN 1998

RECORDS FOR JUNE 4
HIGH 99F IN 1919 [Record for month] LOW 41F IN 1915,1926
PRECIP 1.52 INS IN 2007
PEAK GUST 48 MPH SSE IN 1983

TODAY’S REPORT PREPARED BY: Cece Borries-Strigle