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Saturday, May 28, 2016

May 28, 2016

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, MAY…

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, MAY 28, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

PARTLY CLOUDY SKIES AND LOW VISIBILITY REMAIN IN PLACE
AS HIGHS GO INTO THE RECORD BOOKS

Early clouds have given way to partly cloudy skies but
hazy conditions remain in place despite visibility being
higher than yesterday.

the 1 o’clock observation brought a new record high
temperature with temperatures reaching 91 degrees on
both max thermometers with an observation reading of 90. It’s
entirely possible that temperatures will rise even higher
before the day is over.  The former record of 90F had been set
back in 1929.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, scattered cirrus
Temperature: 71F; Dew Point: 62F; Wind: WSW at 9 kts,
Sea-level pressure: 30.08 ins. Hg, rising, then more quickly
Visibility: 30 miles, hazy
6-hr Max temp: 71F
6-hr Min temp: 64F
BHO SA 1155 70 SCT 120 SCT 30 187/71/62/2409/008/  HAZY/ 8/062 53015
10071 20064

10 A.M.
Weather: Few Altostratus, Few cirrocumulus
Temperature: 81F; Dew Point: 67F; Wind: estimated SSW at 4 kts,
Wind: Light
Sea-level pressure: 30.09 ins. Hg, rising then more slowly
Visibility: 30 miles, hazy
BHO SA 1455 CLR 30 190/81/67/2104/009/ FEW CC ALQDS FEW AS DSNT E-SSE
WND LGT HAZY/ 8/019 51003

1 P.M.
Weather: Scattered Cumulus, Scattered Cirrus
Temperature: 90F; Dew Point: 65F; Wind: SW at 10 kts
Sea-level pressure: 30.06 ins. Hg, rising then falling
Visibility: 30 miles, hazy
6-hr Max temp: 91F
6-hr Min temp: 71F
BHO SA 1755 55 SCT 240 SCT 30 181/90/65/2310/006/ HAZY/
8/202 58009 10090 20071

SUMMARY FOR FRIDAY, MAY 27, 2016

TEMPERATURE (DEGREES F)
MAX…..81   NORMAL…..69
MIN…..60   NORMAL…..51
MEAN….71   NORMAL…..60

DEPARTURE FROM 30-YEAR NORMAL…………………….+11
TOTAL DEPARTURE FOR THE MONTH…………………….-10 [-0.3 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……….+4
TOTAL HEATING UNITS FOR THE SEASON………..5242   DEPARTURE…….-1039
TOTAL HEATING UNITS LAST SEASON TO DATE……6401   DIFFERENCE……-1159

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….26 S    AT  5:26 P.M.
ASOS……………………28 SSW  AT  5:17 P.M.
DAVIS…………………..27 S    AT  5:28 P.M. RMY 29
FASTEST MILE FOR YESTERDAY…………………22 S    AT  5:28 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………23 SE   AT  5:28 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..21 E    AT  5:28 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..9.0 S
ASOS…………………..9.4
DAVIS………………….8.4 S [176 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……-1.25
ASOS…………..2.09
TOTAL PRECIPITATION FOR THE YEAR……….19.20  DEPARTURE……-2.86
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 81/60/71/+11/0.00/0.0/…/..           26 S   AERO 30 S   RMY 29

5/28 low temp since midnight is 64F; 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 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 Millette

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