Thursday, February 11, 2016

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

DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, FEBRUARY 11, 2016
ALL TIMES ARE IN EASTERN STANDARD TIME

SNOW SHOWERS MOVE THROUGH THIS MORNING,
TEMPS BEGIN THEIR DIP AHEAD OF BITTER WEEKEND

Snow showers began this morning at 8:57 AM EST, leaving just a
trace by the 10:00 AM EST observation. Snow showers continued
and started and stopped several times this morning, creating
temporarily limited visibility.

Temperatures last night dipped to a minimum of 20F, and briefly
rose today into the mid 20s. By the 1:00 PM EST observation
temperatures reached a maximum reading of 25F.

Today’s Observations:

7 A.M.
Weather: Snow showers distant S-NNW, virga distant SW,
broken altocumulus, broken cirrus, few stratocumulus distant
offshore NE-SE
Temperature: 22F; Dew Point: 14F; Wind: W at 7 kts,
Sea-level pressure: 29.69 ins. Hg, rising, then more quickly
Visibility: 60 miles, except 30 miles S-NNW, showers distant
6-hr Max temp: 25F
6-hr Min temp: 20F
24-hr precip: 0.01
24-hr snowfall: 0.1
Snow depth: 9 ins.
BHO SA 1155 E80 BKN 200 BKN 60 055/22/14/2607/969/ VSBY S-NNW
30 MI SHWRS DSNT S-NNW VIRGA DSNT SW FEW SC DSNT OFFSHR NE-SE
NEW SNW PST 24 HRS 0.1 INS/ 8/521 4/009 53013 ASOS 70001 MANUAL
70001 10025 20020

10 A.M.
Weather: Light snow showers, overcast stratus
Temperature: 22F; Dew Point: 16F; Wind: W at 10 kts
Sea-level pressure: 29.73 ins. Hg, rising, then more quickly
Visibility: 1 mile, snow showers
3-hr precip: Trace
3-hr snowfall: Trace
BHO SA 1455 E25 OVC 1SW- 067/22/16/2710/973/ SUN DMLY VSBL
NEW SNW PST 3 HRS TRACE/ 8/6// 53012 MANUAL 6000/

1 P.M.
Weather: Overcast stratocumulus, showers and virga in all
directions, thin spots in overcast overhead
Temperature: 24F; Dew Point: 12F; Wind: W at 14G24 kts,
Sea-level pressure: 29.71 ins. Hg, rising, then falling and lower
Visibility: 50 miles, except 25 miles NE-ESE, 70 miles NW,
showers and virga limiting visibility
6-hr Max temp: 25F
6-hr Min temp: 21F
6-hr precip: Trace
6-hr snowfall: Trace
BHO SA 1755 E50 OVC 50 060/24/12/2814G24/971/ VSBY NE-ESE 25 MI
NW 60 SHWRS AND VIRGA ALQDS THN SPT INOVC OVHD NEW SNW PST 6 HRS
TRACE/ 8/5// 58007 MANUAL 6000/ 10025 20021

SUMMARY FOR WEDNESDAY, FEBRUARY 10, 2016

TEMPERATURE (DEGREES F)
MAX…..33   NORMAL…..36
MIN…..21   NORMAL…..18
MEAN….27   NORMAL…..27

DEPARTURE FROM 30-YEAR NORMAL…………………….+0
TOTAL DEPARTURE FOR THE MONTH……………………+85 [+8.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..38   DEPARTURE……….+0
TOTAL HEATING UNITS FOR THE MONTH………….301   DEPARTURE………-86
TOTAL HEATING UNITS FOR THE SEASON………..3043   DEPARTURE……..-875
TOTAL HEATING UNITS LAST SEASON TO DATE……3821   DIFFERENCE…….-778

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….23 W   AT  9:55 P.M. *
ASOS……………………22 W   AT  9:40 P.M.
DAVIS…………………..20 W   AT  8:59 P.M. RMY 21
FASTEST MILE FOR YESTERDAY…………………16 W   AT  9:40 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………17 W   AT  9:40 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..15 W   AT  9:40 P.M.
AVERAGE WIND SPEED AND DIRECTION…………..7.5 SW
ASOS…………………..8.3
DAVIS………………….6.9 SW [222 Deg.] * Last of several occurrences.

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01  DEPARTURE……-0.13
ASOS…………..0.01
TOTAL PRECIPITATION FOR THE MONTH……….3.11  DEPARTURE……+1.76
ASOS…………..3.15
TOTAL PRECIPITATION FOR THE YEAR………..6.88  DEPARTURE……+1.18
ASOS…………..7.09

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.1  DEPARTURE…….-0.4
TOTAL SNOWFALL FOR THE MONTH……………21.3  DEPARTURE……+16.4
TOTAL SNOWFALL FOR THE SEASON…………..36.9  DEPARTURE…….-1.1

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY CALENDAR DAY DATA
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

2/1   64/40/52/+26/0.00/0.0/…/..          36 WNW AERO 37 W   RMY 34
2/2   48/31/40/+14/0.00/0.0/…/..          23 NW  AERO 23 WNW RMY N/A
2/3   55/34/45/+19/0.80/0.0/000/00          55 SSE AERO 58 SSE RMY 53
2/4   55/39/47/+21/…./0.0/000/00          37 W   AERO 36 W   RMY 35
2/5   39/19/29/+3/…./12.5/000/00          37 NNW AERO 39 NNW RMY 35
2/6   35/17/26/0/0.00/0.0/…/..            25 SSW AERO 24 SSW RMY 23
2/7   43/26/35/+8/0.00/0.0/…/..           35 ENE AERO 35 ENE RMY N/A
2/8   36/16/26/-1/…./…/000/00           53 NE  AERO 55 NE  RMY 53
2/9   26/17/22/-5/…./…/000/00           21 N   AERO 22 N   RMY N/A
2/10  33/21/27/+0/0.01/0.0/…/..           23 W   AERO 23 W   RMY 21

2/11   morning low temp. since midnight 20F; normal now 18F

DAILY RECORDS FOR FEBRUARY 2016

-NONE SO FAR-

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

RECORDS FOR FEBRUARY 11
HIGH 60F IN 1981
LOW -10F IN 1899
PRECIP 1.07 INCHES IN 1955
SNOWFALL 9.6 INCHES IN 1933
PEAK GUST 95 MPH S IN 1981

RECORDS FOR FEBRUARY 12
HIGH 56F IN 1999
LOW -14F IN 1914
PRECIP 4.85 INCHES IN 1886 [RECORD FOR MONTH] SNOWFALL 15.0 INCHES IN 2006
PEAK GUST 70 MPH E IN 1985

TODAY’S REPORT PREPARED BY: Brian Fitzgerald