Sunday, May 25, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, MAY 25, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
LIGHT OVERNIGHT SHOWERS BRING 0.02 INCHES OF NEW RAIN,
HUMIDITY AND CLOUDS REMAIN THIS MORNING.
A brief shower brought 0.02 inches of new rain last evening,
while isolated showers and thunderstorms moved through the evening.
Winds have remained uncharacteristically low, with a completely calm
wind reading during this morning’s 7:00 AM EST observation. Peak gusts
have remained below 20 MPH since Monday the 19th, with no days averaging
above average for wind speed since the 16th.
By mid day today significant cloud development distant to our west
culminated in a massive cumulonimbus forming north of Worcester moving
SSE. The National Weather Service issued a Severe Thunderstorm Warning
with this cell as its anvil continued to climb and push outward from
the storm’s center. Hail and gusty winds appeared to be likely threats
from this cell.
Today’s Observations:
7 A.M.
Weather: Overcast stratus, light fog in all directions
Temperature: 53F; Dew Point: 50F; Wind: CALM
Sea-level pressure: 30.09 ins. Hg, rising then rising quickly
Visibility: 9 miles, 20 miles NE, obscured by light fog
6-hr max temp: 53F
6-hr min temp: 49F
24-hr precip: 0.02 inches
BHO SA 1155 E4 OVC 9 190/53/50/0000/009/ VSBY NE 20 MI LGT FG ALQDS
WND CALM/ 8/6// 53015 ASOS 70001 MANUAL 70002 10053 20049
10 A.M.
Weather: Broken stratocumulus
Temperature: 58F; Dew Point: 51F; Wind: estimated W at 2 kts
Wind Speed: Light
Sea-level pressure: 30.11 ins. Hg, rising then steady
Visibility: 15 miles, 20 miles NE-S, obscured by light fog
BHO SA 1455 E9 BKN 15 195/58/51/E2802/011/
VSBY NE-S 20 MI LGT FG ALQDS WND LGT/ 8/500 51005
1 P.M.
Weather: Scattered cumulus, cumulonimbus distant WSW moving
SSE, few altocumulus SW-NW, few cirrocumulus SW-WSW
Temperature: 67F; Dew Point: 52F; Wind: estimated W at 3 kts,
Wind Speed: Light
Sea-level pressure: 30.08 ins. Hg, steady then falling
Visibility: 35 miles, light distant haze in all directions
6-hr max temp: 67F
6-hr min temp: 52F
BHO SA 1755 19 SCT 35 187/67/52/E2603/008/ CB DSNT WSW MOV SSE
FEW AC SW-NW FEW CC SW-WSW LGT HZ ALQDS WND LGT/ 8/349 58008
10067 20052
WEATHER SUMMARY FOR SATURDAY, MAY 24, 2014
TEMPERATURE (DEGREES F)
MAX…..65 NORMAL…..69
MIN…..49 NORMAL…..50
MEAN….57 NORMAL…..59
DEPARTURE FROM 30-YEAR NORMAL……………………..-2
TOTAL DEPARTURE FOR THE MONTH…………………….+66 [+2.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………8 DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE MONTH………….160 DEPARTURE………-68
TOTAL HEATING UNITS FOR THE SEASON………..6331 DEPARTURE………+68
TOTAL HEATING UNITS LAST SEASON TO DATE……5687 DIFFERENCE…….+644
COOLING DEGREE DAYS (SEASON JAN-DEC)
TOTAL COOLING UNITS FOR YESTERDAY…………..0 DEPARTURE……….-1
TOTAL COOLING UNITS FOR THE MONTH………….13 DEPARTURE……….+0
TOTAL COOLING UNITS FOR THE SEASON…………13 DEPARTURE……….-2
TOTAL COOLING UNITS LAST SEASON TO DATE……..6 DIFFERENCE………+7
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………17 ENE AT 11:57 A.M.
ASOS…………………..20 E AT 11:57 A.M.
DAVIS………………….18 ENE AT 11:56 A.M. RMY 18
FASTEST MILE FOR YESTERDAY………………..10 ENE AT 11:55 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..16 E AT 11:58 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….14 ENE AT 11:58 A.M.
AVERAGE WIND SPEED AND DIRECTION…………. 7.5 NNE
ASOS…………………..7.7
DAVIS………………….6.9 NE [44 deg]
* Last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02 DEPARTURE………….-0.13
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….2.41 DEPARTURE………….-0.64
ASOS…………..2.41
TOTAL PRECIPITATION FOR THE YEAR……….21.53 DEPARTURE………….-0.07
ASOS………….21.94
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/+10/0.26/0.0/026/03 36 S RMY 41
5/17 74/52/63/+6/1.04/0.0/555/63 36 SSE RMY N/A
5/18 67/47/57/-1/0.00/0.0/521/59 20 NW RMY N/A
5/19 65/48/56/-2/0.12/0.0/443/50 35 NNW RMY 38
5/20 71/48/60/+2/T/0.0/771/89 25 NNW RMY 26
5/21 71/51/61/+2/0.00/0.0/…/.. 18 ESE RMY 20
5/22 67/51/59/0/…./0.0/…/.. 15 SSE RMY 18
5/23 60/49/55/-4/…./0.0/…/.. 16 NE RMY 18
5/24 65/49/57/-2/…./0.0/…/.. 17 ENE RMY 18
5/25 morning low temp: 49F; the normal low is now 51F
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 25
HIGH 91F IN 2007
LOW 37F IN 1967
PRECIP 3.73 INS IN 1967
PEAK GUST 83 MPH NE IN 1967 (RECORD FOR MAY)
RECORDS FOR MAY 26
HIGH 94F IN 2010 (RECORD FOR MAY)
LOW 37F IN 1972,2013
PRECIP 1.73 INS IN 2003
SNOWFALL TRACE IN 1967 (Fell as ice pellets in nor’easter)
PEAK GUST 62 MPH NE IN 1967
TODAY’S REPORT PREPARED BY: Brian Fitzgerald
