Sunday, January 10, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SUNDAY, JANUARY 10, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

RAIN AND WIND WITH A TOTAL OF OVER THREE-QUARTERS OF AN
INCH AND ESE WINDS GUSTING TO ALMOST 50 MPH BEFORE NOON
TEMP. EQUALS 54 DEGREE RECORD JUST AFTER 1 P.M.
PEAK WIND GUST 55 MPH SSE AT 1:16 P.M.

The temperature rose from 38 degrees very early this morning
to the low 50’s by noon and was approaching today’s record high
maximum of 54 degrees set in 2000. Increasing ESE winds were
reaching speeds well past 40 MPH and our new Aerovane had
peak gust of 48 MPH ESE while the same was recorded on the
ASOS system. Rainfall was light to moderate and then heavy with
0.34 falling in the hour ending at noon. The daily total has now
exceeded 0.75 inch.

Today’s Observations:

7 A.M.
Weather: Obscurement with fog, light rain occurring
Temperature: 44F; Dew Point: 44F; Wind: E at 16 kts
Sea-level pressure: 29.97 ins. Hg, falling then more slowly,
Pressure falling rapidly past 20 mins.
Visibility: 1/8 mile, light rain and heavy fog
6-hr Max temp: 44F
6-hr Min temp: 38F
24-hr precip: 0.02 in.
Snow depth: Zero
BHO SA 1155 W2X 1/8R-F 149/44/44/0916/997/ RBXX PRESFR/
8//// 56041 ASOS 70002 MANUAL 70002 1044 20038

10 A.M.
Weather: Obscurement with fog, light rain occasional modt. rain
Temperature: 48F; Dew Point: 48F; Wind: ESE at 21G32 kts
Wind: Peak wind 33 kts ESE at 9:37 A.M.
Wind: Direction variablity from ENE to SSE
Sea-level pressure: 29.83 ins. Hg, falling then more rapidly,
Pressure falling rapidly
Visibility: 1/8 mile, light rain and heavy fog
3-hourly rainfall: 0.18 in.
BHO SA 1455 W3X 1/8R-F 103/48/48/1121G32/983/ R- OCNL R
PRESFR PK WND 1133/37/ WND 07V15/ 8//// 58046
ASOS 60016 MANUAL 60018

1 P.M.
Weather: Broken stratus fractus, overcast nimbostratus, heavy rain
with fog
Temperature: 53F; Dew Point: 53F; Wind: SE at 24G37 kts
Wind: Peak wind from SE at 37 kts at 12:46 P.M.
Sea-level pressure: 29.54 ins. Hg, falling rapidly then more slowly
Pressure: Pressure falling rapidly past hour
Visibility: 1.5 miles, variable 1 to 2 miles, heavy rain and fog
6-hr Max temp: 53F
6-hr Min temp: 44F
BHO SA 1755 E5 BKN 10 OVC 11/2VR+F 002/53/53/1424G37/954/
PK WND 1437/46/ VSBY 1V2 STFRA DRFTNG OVR SMT PRESFR/ 8/72/
56101 MANUAL 60109 ASOS 60110 10053 20044

SUMMARY FOR SATURDAY, JANUARY 9, 2016

TEMPERATURE (DEGREES F)
MAX…..39   NORMAL…..34
MIN…..36   NORMAL…..17
MEAN….38   NORMAL…..26

DEPARTURE FROM 30-YEAR NORMAL…………………..+12
TOTAL DEPARTURE FOR THE MONTH…………………..+33 [+3.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..27   DEPARTURE………-12
TOTAL HEATING UNITS FOR THE MONTH………….316   DEPARTURE………-33
TOTAL HEATING UNITS FOR THE SEASON………..1972   DEPARTURE……..-682
TOTAL HEATING UNITS LAST SEASON TO DATE……2435   DIFFERENCE…….-463

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….21  ENE AT   1:08 A.M.*
AEROVANE………………..20  ENE AT   1:08 A.M.*
ASOS……………………20  ENE AT   1:05 A.M.
DAVIS…………………..17  ENE AT   1:04 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY…………………13  ENE
MAXIMUM 2-MINUTE ASOS AVERAGE………………15  E   AT   1:06 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..12  E   AT   1:06 A.M.
AVERAGE WIND SPEED AND DIRECTION……………6.6 E
ASOS……………………7.1
DAVIS…………………..5.8 E  [80 Deg.] *last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.02  DEPARTURE……-0.12
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE MONTH……….0.02  DEPARTURE……-1.26
ASOS…………..0.02
TOTAL PRECIPITATION FOR THE YEAR……….,0,02  DEPARTURE……-1.26
ASOS…………..0.02

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…….-0.6
TOTAL SNOWFALL FOR THE MONTH…………….0.2  DEPARTURE…….-4.8
TOTAL SNOWFALL FOR THE SEASON……………1.5  DEPARTURE……-19.5

PRELIMINARY CLIMATE SUMMARY FOR JANUARY CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/ AERO/RMY 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

1/1   37/29/33/+6/0.00/0.0/…/..           29 W               RMY 29
1/2   37/27/32/+5/0.00/0.0/…/..           31 W               RMY N/A
1/3   41/27/34/+8/0.00/0.0/…/..           28 W               RMY 29
1/4   30/10/20/-6/T/T/000/00                29 NNW             RMY 29
1/5   23/4/14/-12/0.00/0.0/…/..           28 NNW             RMY N/A
1/6   43/17/30/+4/0.00/0.0/…/..           24 SW              RMY 24
1/7   43/25/34/+8/0.00/0.0/…/..           21 SW              RMY N/A
1/8   40/28/34/+8/T/0.0/…/..              28 E   AERO 25 ENE RMY 25
1/9   39/36/38/+12/T/0.0/…/..             21 ENE AERO 20 ENE RMY N/A

1/10  low since midnight is 38F; normal low is now 17F

DAILY RECORDS FOR JANUARY 2016

None so far.

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

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

RECORDS FOR JANUARY 11
HIGH 59F IN 1975
LOW -7F IN 1968
PRECIP 1.58 INS. IN 2008
SNOW 10.2 INS. 1927
PEAK GUST 95e MPH S IN 1980

TODAY’S REPORT PREPARED BY: Robert Skilling