Monday, May 9, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, MAY 9, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

HIGH PRESSURE BUILDS LEADING TO SUNNY SKIES AND WARM TEMPS

Yesterday’s rain totaled 0.10 inches bringing this month’s total
to 1.60 inches.  Winds peaked early in the evening with a gust of
47 MPH from the west at 5:10 P.M. EST.

Sunny skies and dry conditions have returned with  the building
of high pressure over the region today.  Temperatures increased
all day with a max of 65F by 1:00 P.M.

Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, broken altocumulus
Temperature: 49F; Dew Point: 35F; Wind: W at 14G22 kts
Sea-level pressure: 29.96 ins. Hg, rising, then less quickly
Visibility: 70 miles
6-hr Max temp: 49F
6-hr Min temp: 43F
24-hr precip: 0.10 in.
BHO SA 1155 E64 BKN 79 BKN 70 145/49/35/2614G22/996/
8/460 51027 ASOS 70011 MANUAL 70010 10049 20043

10 A.M.
Weather: Scattered cumulus
Temperature: 59F; Dew Point: 30F; Wind: W at 15G22 kts
Peak Wind: W at 29 kts, 9:31 A.M. EST
Sea-level pressure: 29.95 ins. Hg, falling
Visibility: 70 miles
BHO SA 1455 54 SCT 70 143/59/30/2715G22/995/ PK WND 2829/31/
8/100 58002

1 P.M.
Weather: Scattered cumulus
Temperature: 65F; Dew Point: 28F; Wind: WNW at 18G28 kts
Peak Wind: W at 32 kts, 12:08 P.M. EST
Sea-level pressure: 29.95 ins. Hg, falling, then more slowly
Visibility: 80 miles
6-hr Max temp: 65F
6-hr Min temp: 49F
BHO SA 1755 54 SCT 80 141/65/28/2918G28/995/ PK WND 2732/08/
8/100 56002 10065 20049

SUMMARY FOR SUNDAY, MAY 8, 2016

TEMPERATURE (DEGREES F)
MAX…..60   NORMAL…..64
MIN…..46   NORMAL…..45
MEAN….53   NORMAL…..55

DEPARTURE FROM 30-YEAR NORMAL……………………..-2
TOTAL DEPARTURE FOR THE MONTH…………………….-56 [-7.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..12   DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE MONTH………….145   DEPARTURE………+52
TOTAL HEATING UNITS FOR THE SEASON………..5137   DEPARTURE……..-990
TOTAL HEATING UNITS LAST SEASON TO DATE……6320   DIFFERENCE……-1183

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….47 W   AT 5:10 P.M.*
ASOS……………………47 WNW AT 5:11 P.M.
DAVIS…………………..47 NNW AT 5:11 P.M.  RMY 49
FASTEST MILE FOR YESTERDAY…………………31 WNW AT 5:21 P.M.*
MAXIMUM 2-MINUTE ASOS AVERAGE………………31 WNW AT 5:38 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..29 WNW AT 5:11 P.M.
AVERAGE WIND SPEED AND DIRECTION……………14.2 SSW
ASOS……………………13.6
DAVIS…………………..12.7 WSW [240 Deg.] * Last of several occurrences.

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.10  DEPARTURE……-0.02
ASOS…………..0.11
TOTAL PRECIPITATION FOR THE MONTH……….1.60  DEPARTURE……+0.62
ASOS…………..1.59
TOTAL PRECIPITATION FOR THE YEAR……….18.54  DEPARTURE……-0.99
ASOS………….18.59

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/…/0.0/…/..              28 ENE AERO 29 N   RMY 26
5/7 51/43/47/-8/…/0.0/…/..              25 NE  AERO 25 NE  RMY 23
5/8 60/46/53/-2/…/0.0/…/..              47 W   AERO 53 W   RMY 49

5/9 low temp since midnight is 43F; normal low now 46F

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 9
HIGH 93F IN 2000
LOW 31F IN 1947
PRECIP 2.72 INCHES IN 1954
SNOWFALL 5.0 INS IN 1977 (RECORD FOR MAY)
PEAK GUST 70e MPH NE IN 1977

RECORDS FOR MAY 10
HIGH 93F IN 1896
LOW 29F IN 1900
PRE 1.85 INS IN 1998
SNOW 2.8 INS 1977 (7.8 INS TOTAL 5/9-5/10 1977)
PEAK GUST 64 MPH S IN 1990

TODAY’S REPORT PREPARED BY: Cece Borries-Strigle