Tuesday, May 20, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, MAY 20, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
POP-UP SHOWERS BRING 0.12 INCHES OF NEW RAIN YESTERDAY-
CALMER CONDITIONS TODAY
It was another clear start to the day today with visibilities
of 60 miles in all directions along with only a few clouds in
the distance.
By mid day yesterday, dynamic skies were present with isolated
virga and showers in most directions with intermittent showers
beginning after the 1:00 PM EST observation.
Mid day today featured mostly clear skies with only a few cumulus
present in most directions and visibility continuing at 60 miles.
The maximum so far today by the 1:00 PM EST observation was 70F
with altocumulus and altocumulus lenticularis forming from the
spreading out of cumulus.
Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus distant offshore ENE-SE,
few altocumulus and cirrus fibratus distant NNW-SSE
Temperature: 56F; Dew Point: 43F; Wind: NNW at 10G15 kts
Sea-level pressure: 30.01 ins. Hg, rising, then steady
Visibility: 60 miles
6-hr max temp: 56F
6-hr min temp: 48F
24-hr precip: 0.12 inches
BHO SA 1155 CLR 60 164/56/43/3410G15/001/ FEW SC DSNT OFFSHR ENE-SE
FEW AC AND CI DSNT NNW-SSE/ 8/531 51008 ASOS 70010 MANUAL 70012 10056
20048
10 A.M.
Weather: Clear, few cumulus in all directions, few altocumulus
distant N-NE, few cirrus fibratus distant N-SSE
Temperature: 67F; Dew Point: 40F; Wind: NNW at 11G20 kts,
Sea-level pressure: 29.99 ins. Hg, steady, then falling
Visibility: 60 miles
BHO SA 1455 CLR 60 156/67/40/3311G20/999/ FEW CU ALQDS
FEW AC DSNT N-NE FEW CI DSNT N-SSE/ 8/131 58008
1 P.M.
Weather: Scattered altocumulus, few altocumulus lenticularis
distant ENE-SE
Temperature: 68F; Dew Point: 44F; Wind: ENE at 7 kts,
Sea-level pressure: 29.98 ins. Hg, falling then falling more slowly
Visibility: 60 miles
6-hr max temp: 70F
6-hr min temp: 56F
BHO SA 1755 70 SCT 60 151/68/44/0607/998/
FEW ACSL DSNT ENE-SE/ 8/060 56005 10070 20056
WEATHER SUMMARY FOR MONDAY, MAY 19, 2014
TEMPERATURE (DEGREES F)
MAX…..65 NORMAL…..67
MIN…..48 NORMAL…..49
MEAN….56 NORMAL…..58
DEPARTURE FROM 30-YEAR NORMAL……………………..-2
TOTAL DEPARTURE FOR THE MONTH…………………….+68 [+3.4 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………9 DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE MONTH………….127 DEPARTURE………-66
TOTAL HEATING UNITS FOR THE SEASON………..6298 DEPARTURE………+70
TOTAL HEATING UNITS LAST SEASON TO DATE……5672 DIFFERENCE…….+626
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE……….-1
TOTAL COOLING UNITS FOR THE MONTH………….13 DEPARTURE……….+5
TOTAL COOLING UNITS FOR THE SEASON…………13 DEPARTURE……….+3
TOTAL COOLING UNITS LAST SEASON TO DATE……..3 DIFFERENCE………+10
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………35 NNW AT 3:11 P.M.
ASOS…………………..39 NNW AT 3:11 P.M.
DAVIS………………….34 NNW AT 3:09 P.M. RMY 38
FASTEST MILE FOR YESTERDAY………………..25 NNW AT 4:11 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..25 NNW AT 4:12 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….22 NNW AT 3:09 P.M.
AVERAGE WIND SPEED AND DIRECTION………….12.2 NW
ASOS………………….11.4
DAVIS…………………10.4 NW [319 deg]
* Last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.12 DEPARTURE………….-0.02
ASOS…………..0.10
TOTAL PRECIPITATION FOR THE MONTH……….2.08 DEPARTURE………….-0.27
ASOS…………..2.09
TOTAL PRECIPITATION FOR THE YEAR……….21.20 DEPARTURE………….+0.30
ASOS………….21.62
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/RMY 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/+1/0.49/0.0/093/11 32 SSE RMY 36
5/2 68/51/60/+7/T/0.0/457/54 28 W RMY 29
5/3 66/48/57/+4/0.00/0.0/332/39 21 SW RMY N/A
5/4 60/47/54/0/0.01/0.0/400/47 51 WNW RMY 54
5/5 64/46/55/+1/T/0.0/592/70 30 NW RMY 32
5/6 63/42/53/-1/T/0.0/506/59 30 NW RMY 30
5/7 64/42/55/0/0.00/0.0/850/99 21 WNW RMY 23
5/8 69/48/59/+4/0.00/0.0/612/71 17 SSW RMY 19
5/9 57/51/54/-1/0.05/0.0/000/00 21 S RMY N/A
5/10 78/57/68/+13/0.10/0.0/043/05 33 S RMY 37
5/11 79/58/69/+13/0.01/0.0/746/86 30 W RMY N/A
5/12 85/49/67/+11/0.00/0.0/792/91 39 NE RMY 42
5/13 54/42/48/-8/0.00/0.0/113/13 32 NE RMY N/A
5/14 73/42/58/+1/T/ 0.0/613/70 22 S RMY 24
5/15 77/57/67/+10/T/0.0/140/16 27 S RMY 33
5/16 73/60/67/+10/…./0.0/…/.. 36 S RMY 41
5/17 74/52/63/+6/…./0.0/…/.. 36 SSE RMY N/A
5/18 67/47/57/-1/0.00/0.0/…/.. 20 NW RMY N/A
5/19 65/48/56/-2/…./…/…/.. 35 NNW RMY 38
5/20 morning low temp: 48F; the normal low is now 49F
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 20
HIGH 91F IN 1975,1996
LOW 37F IN 1948, 2002
PRECIP 1.65 INCHES IN 1969
PEAK GUST 57 MPH S IN 1963, WNW IN 1982
RECORDS FOR MAY 21
HIGH 92F IN 1921
LOW 35F IN 1907
PRECIP 1.61 INS IN 1954
PEAK GUST 74 MPH WSW IN 2006
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
