Thursday, May 8, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, MAY 8, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

LIGHT WINDS ACCOMPANY CLEAR SKIES AND
SEASONABLE WARMTH ONCE AGAIN

Mostly clear and sunny skies have prevailed once
again this morning following a beautiful spring
day yesterday. A high temperature of 68F was recorded
during yesterday afternoon with an overnight low
dipping comfortably down to 48F.

Haze and some moisture to our south and west have
prevented visibilities of greater than 60 miles
today with generally thin cirrus/cirrocumulus
dominating most of the sky.

By 1:00 PM EST showers were distant and visible to
the SSE with mostly sunny skies overhead. Cirrocumulus
lenticularis were also visible to the W-WNW. Temperatures
have also reached up to 67F so far.

Today’s Observations:

7 A.M.
Weather: Scattered cirrocumulus, thin overcast of cirrus fibratus
Temperature: 54F; Dew Point: 35F; Wind: calm
Wind: Light and variable NNE-SSE
Sea-level pressure: 30.18 ins. Hg, rising then falling but higher
Visibility: 60 miles, 40 miles WNW-NNW, obscured by a dark smoke
layer WNW-NNW, light haze in all directions
6-hr max temp: 54F
6-hr min temp: 48F
24-hr precip: None
BHO SA 1155 200 SCT E250 –OVC 60 221/54/35/0000/018/
DRK K LYR ALG HRZN WNW-NNW VSBY WNW-NNW 40 MI LGT HZ ALQDS
WND LGT AND VRB 03V15/ 8/001 50004 10054 20048

10 A.M.
Weather: Few altocumulus lenticularis distant SSE-NNW,
broken altocumulus, broken cirrocumulus
Temperature: 64F; Dew Point: 34F; Wind: estimated NE at 6 kts,
Wind Speed: Light
Sea-level pressure: 30.18 ins. Hg, falling slightly
Visibility: 45 miles, obscured by light haze in all directions
BHO SA 1455 E140 BKN 200 BKN 45 220/64/34/E0406/018/
FEW ACSL DSNT SSE-NNW LGT HZ ALQDS WND LGT/ 8/039 58001

1 P.M.
Weather: Showers distant SSE, few cumulus distant S-W,
scattered altocumulus, scattered altocumulus lenticularis,
broken cirrus fibratus, cirrocumulus lenticularis distant W-WNW
Temperature: 66F; Dew Point: 37F; Wind: estimated ENE at 6 kts,
Wind Speed: Light
Sea-level pressure: 30.13 ins. Hg, decreasing steadily
Visibility: 35 miles, light haze
6-hr max temp: 67F
6-hr min temp: 54F
BHO SA 1755 110 SCT 140 SCT E250 BKN 35 202/66/37/E0706/013/
SHWRS DSNT SSE FEW CU DSNT S-W ACSL ALQDS CCSL DSNT W-WNW LGT
HZ ALQDS WND LGT/ 8/171 57018 10067 20054

WEATHER SUMMARY FOR WEDNESDAY, MAY 7, 2014

TEMPERATURE (DEGREES F)
MAX…..68    NORMAL…..64
MIN…..42    NORMAL…..45
MEAN….55    NORMAL…..55

DEPARTURE FROM 30-YEAR NORMAL……………………+/-0
TOTAL DEPARTURE FOR THE MONTH…………………….+12 [+1.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..10  DEPARTURE……….-1
TOTAL HEATING UNITS FOR THE MONTH…………..67  DEPARTURE………-15
TOTAL HEATING UNITS FOR THE SEASON………..6238  DEPARTURE……..+121
TOTAL HEATING UNITS LAST SEASON TO DATE……5601  DIFFERENCE…….+637

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………21 WNW  AT  2:53 P.M.*
ASOS…………………..32 WNW  AT  2:53 P.M.
DAVIS………………….21 W    AT  2:14 P.M.  RMY 23
FASTEST MILE FOR YESTERDAY………………. 14 WNW  AT  2:54 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..16 W    AT  2:16 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….15 W    AT  2:16 P.M.
AVERAGE WIND SPEED AND DIRECTION………….9.8 WNW
ASOS………………….10.2
DAVIS…………………8.8 WNW [287 deg]

* Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE………….-0.13
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.50  DEPARTURE………….-0.37
ASOS…………..0.51
TOTAL PRECIPITATION FOR THE YEAR……….19.62  DEPARTURE………….+0.20
ASOS………….20.04

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…………..85.6  DEPARTURE………….+22.9

PRELIMINARY CLIMATE SUMMARY FOR MAY 2014 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO 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  64/43/54/+1/0.49/0.0/…/..          32 SSE RMY 36
5/2  68/51/60/+7/T/0.0/…/..             28 W   RMY 29
5/3  66/48/57/+4/…./0.0/…/..          21 SW  RMY N/A
5/4  60/47/54/0/0.01/0.0/…/..           51 WNW RMY 54
5/5  64/46/55/+1/T/0.0/…/..             30 NW  RMY 32
5/6  63/42/53/-1/T/0.0/…/..             30 NW  RMY 30
5/7  64/42/55/0/0.00/0.0/…/..           21 WNW RMY 23

5/8 morning low temp: 48F; the normal low is now 45F

DAILY RECORDS FOR MAY 2014
None so far.

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

RECORDS FOR MAY 8
HIGH 89F IN 2000
LOW 29F IN 1956
PRECIP 1.48 INCHES IN 1886
SNOWFALL TRACE IN 1898, 1947
PEAK GUST 68e MPH NNW IN 1943

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

TODAY’S REPORT PREPARED BY: Brian Fitzgerald