Thursday, January 9, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JANUARY 9, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
THE SKY BECOMES COMPLETELY CLOUDLESS BY EARLY AFTERNOON
LESS COLD BY 10 DEGREES THAN 24 HOURS AGO AT 7 A.M.
JANUARY AVERAGE RUNNING 8 DEGREES COLDER THAN NORMAL
TRACES OF OLD SNOW REMAIN IN PATCHES AROUND SUMMIT
Clouds seen offshore this morning along with a few middle and
high clouds also seen along the eastern and southern horizon
had completely disappeared by noon today so the afternoon sky
appears perfectly clear and “SKC” is used in the observation.
The moderating trend in temperatures has begun, although temperatures
will likely remain sub-freezing today, with our maximum nearing 30
degrees this afternoon. If today remains below freezing, 7 out of
the past 9 days will have had maximum temperatures below freezing.
Traces of the snow which fell earlier this month still remain on
the ground today.
Today’s Observations:
7 A.M.
Weather: Clear, cumulus/stratocumulus layer distant offshore NE-ESE,
few altocumulus lenticularis distant ESE and S, cirrus distant ESE-S
Temperature: 13F; Dew Point: 3F; Wind: W at 12 kts
Sea-level pressure: 30.52 ins. Hg, rising then more rapidly
Visibility: 30 miles, distant haze
6-hr. min temp: 13F
Snow depth on ground: Trace
BHO SA 1155 CLR 30 334/13/3/2612/052/ CU/SC DSNT OFFSHR NE-ESE FEW
ACSL DSNT ESE AND S CI DSNT ESE-S DSNT HZ/ 8/841 53021 10016 20013
10 A.M.
Weather: Clear, few cirrus distant SE
Temperature: 21F; Dew Point: 6F; Wind: W at 10G19 kts
Sea-level pressure: 30.59 ins. Hg, increasing, then more slowly
Visibility: 40 miles, thin smoke layer SW-NW-NE, distant haze all quadrants
BHO SA 1455 CLR 40 359/21/6/2810G19/059/ FEW CI DSNT SE DSNT HZ
WND 25V32/ 8/001 51025
1 P.M.
Weather: Sky perfectly clear, SKC
Temperature: 26F; Dew Point: 4F; Wind: NW at 9 kts,
Wind: Direction variable W to N
Sea-level pressure: 30.56 ins. Hg, falling then more slowly
Visibility: 55 miles, light distant haze
6-hr max. temp: 27F
BHO SA 1755 CLR 55 348/26/4/3109/056/ SKC LGT DSNT HZ WND 27V35/
56011 10027 20013
WEATHER SUMMARY FOR WEDNESDAY, JANUARY 8, 2014
TEMPERATURE (DEGREES F)
MAX…..21 NORMAL…..34
MIN……3 NORMAL…..18
MEAN….12 NORMAL…..26
DEPARTURE FROM 30-YEAR NORMAL…………………..-14
TOTAL DEPARTURE FOR THE MONTH…………………..-59 [-7.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..53 DEPARTURE………+14
TOTAL HEATING UNITS FOR THE MONTH………….375 DEPARTURE………+65
TOTAL HEATING UNITS FOR THE SEASON………..2652 DEPARTURE………+38
TOTAL HEATING UNITS LAST SEASON TO DATE……2321 DIFFERENCE…….+331
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………28 WSW AT 1:49 A.M.
AERO…………………..29 WSW AT 1:49 A.M.
ASOS…………………..30 WSW AT 1:50 A.M.
DAVIS………………….28 WSW AT 1:49 A.N. RMY N/A
FASTEST MILE FOR YESTERDAY………………..21 WSW AT 1:50 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..21 WSW AT 1:51 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….20 WSW AT 1:50 A.M.
AVERAGE WIND SPEED AND DIRECTION…………11.4 WSW
ASOS…………………11.7
DAVIS………………..10.9 WSW [250 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE………….-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.72 DEPARTURE………….+0.58 #
ASOS…………..2.02
TOTAL PRECIPITATION FOR THE YEAR………..1.72 DEPARTURE………….+0.58 #
ASOS…………..2.02
# these departures were in slight error in yesterday’s climate report but
a correction has now been made
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……..0.0 DEPARTURE…………..-0.5
TOTAL SNOWFALL FOR THE MONTH………….15.6 DEPARTURE………….+11.6
TOTAL SNOWFALL FOR THE SEASON…………31.3 DEPARTURE………….+11.3
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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: RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
1/1 26/16/21/-6/0.00/0.0/505/92 25 W AERO 25 MPH W RMY 27
1/2 24/00/12/-15/…./../000/00 39 NNE AERO 39 MPH NNE RMY 39
1/3 12/-3/05/-21/…/../270/49 36 N AERO 39 MPH N RMY N/A **
1/4 25/-4/11/-15/…./../545/99 35 SSW AERO 37 MPH SSW RMY 38
1/5 42/23/33/+07/…./../259/47 30 SE AERO 32 MPH SE RMY N/A **
1/6 57/25/41/+15/…./../006/01 41 S AERO 46 MPH S RMY 48
1/7 25/6/16/-10/0.00/0.0/555/100 * 44 WNW AERO 46 MPH WNW RMY N/A **
1/8 21/3/12/-14/0.00/0.0/550/99 28 WSW AERO 29 MPH WSW RMY N/A **
1/9 morning low temp: 13F; the normal low is now 17F
* Maximum and mean temperature and departure corrected for 1/7
** not available for the midnight to midnight days of record
DAILY RECORDS SET THIS MONTH
None so far
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JANUARY 9
HIGH 62F IN 1937
LOW -9F IN 1968
PRECIP 3.00 INS. IN 1956
SNOWFALL 10.0 INS. IN 1904
PEAK GUST 101e SE IN 1978 (January record)
RECORDS FOR JANUARY 10
HIGH 54F IN 2000
LOW -7F IN 2004
PRECIP 2.16 INS. IN 1935
SNOWFALL 6.3 INS. IN 1977
PEAK GUST 73e SE IN 1977
TODAY’S REPORT PREPARED BY: Robert Skilling
