Friday, May 9, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MAY 9, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

COOL, CLOUDY AND BECOMING FOGGY WITH DRIZZLE

Temperatures have only risen to 54F by 2 P.M. EDT from a low
this morning of 51F.  Light drizzle began along with some
light rain this morning with 0.03 accumulation recorded
through early this afternoon.

Today’s Observations:

7 A.M.
Weather: Overcast stratus, thin fog
Temperature: 51F; Dew Point: 49F; Wind: ENE at 7 kts
Sea-level pressure: 30.22 ins. Hg, rising then more slowly
Visibility: 8 miles, thin fog, except 9 miles N
6-hr max temp: 54F
6-hr min temp: 51F
24-hr precip: None
BHO SA 1155 E5 OVC 8 234/51/49/0607/022/ THN F ALQDS VSBY N 9/
8/6// 51014 10054 20051

10 A.M.
Weather: Overcast stratus, light drizzle occurring, thin fog
Temperature: 53F; Dew Point: 53F; Wind: ENE at 3 kts
Wind Speed: Light
Sea-level pressure: 30.24 ins. Hg, rising slightly
Visibility: 1 1/2 miles, light drizzle and thin fog
3-hour precip: 0.01 in. (manual)
BHO SA 1455 E5 OVC 11/2L-F 240/53/53/0703/024/ REUKN/ 8/6// 51006
MANUAL 6001/ ASOS 60000

1 P.M.
Weather: Obscured with fog, light drizzle and fog
Temperature: 52F; Dew Point: 52F; Wind: ENE at 4 kts
Sea-level pressure: 30.23 ins. Hg, decreasing steadily
Visibility: 1/16 mile
BHO SA 1755 W3 X 1/16L-F 236/52/52/0704/023/ 8//// 55000 ASOS 60003
MANUAL 6003/ 10054 20051

WEATHER SUMMARY FOR THURSDAY, MAY 8, 2014

TEMPERATURE (DEGREES F)
MAX…..69    NORMAL…..64
MIN…..48    NORMAL…..46
MEAN….59    NORMAL…..55

DEPARTURE FROM 30-YEAR NORMAL……………………..+4
TOTAL DEPARTURE FOR THE MONTH…………………….+16 [+1.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………6  DEPARTURE……….-4
TOTAL HEATING UNITS FOR THE MONTH…………..73  DEPARTURE………-20
TOTAL HEATING UNITS FOR THE SEASON………..6244  DEPARTURE……..+117
TOTAL HEATING UNITS LAST SEASON TO DATE……5603  DIFFERENCE…….+641

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………17 SSW  AT  1:24 P.M.
ASOS…………………..19 S    AT  2:07 P.M.
DAVIS………………….17 S    AT  2:06 P.M. RMY 19
FASTEST MILE FOR YESTERDAY………………. 13 SSW  AT  7:24 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..14 SSW  AT  7:24 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….13 SSW  AT  7:24 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.2 SW
ASOS…………………..7.3
DAVIS………………….6.8 SW  [230 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………….-0.50
ASOS…………..0.51
TOTAL PRECIPITATION FOR THE YEAR……….19.62  DEPARTURE………….+0.07
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  69/48/59/0.00/0.0/…/..             17 SSW RMY 19

5/9  morning low temp: 51F; the normal low is now 46F

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 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: Robert Skilling