Saturday, November 16, 2013

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

DAILY DISCUSSION AND CLIMATE SUMMARY
SATURDAY, NOVEMBER 16, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME

EARLY CLOUDS DEPART BY MID-DAY AS DAY TURNS SUNNY AND WARMER…

A small disturbance moved through overnight and brought a few showers
far to the southwest, though no precipitation was recorded at the
Observatory.  The overnight temperature remained a very mild 40F,
though lower elevations dropped to near freezing this morning.  The
low temperature at Norwood Airport today was 31F.

Once again the temperature has warmed up nicely this afternoon, just
reaching the high on Friday of 59F as of 2 PM. The air remains very
dry with a dew point of 20F and a relative humidity of 23% being
measured on the summit at 1 PM today.

Today’s Observations:

7 A.M.
Weather: Broken altocumulus, overcast altocumulus, high cirrus
clouds visible, breaks in overcast south, hazy
Temperature: 43F; Dew Point: 25F; Wind: WNW at 10 kts.
Sea-level pressure: 30.27 ins. Hg, rising then rising more slowly
Visibility: 30 miles, hazy
6-hr min temp: 40F
BHO SA 1155 E90 BKN 130 OVC 30 249/43/25/2910/027/ HIR CLDS VSBL
BINOVC DSNT S HAZY/ 8/071 51011 10043 20040

10 A.M.
Weather: Scattered stratocumulus, broken altocumulus, thin smoke
layer along horizon N-ENE, hazy
Temperature: 48F; Dew Point: 22F; Wind: WNW at 11 kts.
Sea-level pressure: 30.31 ins. Hg, rising then rising more slowly
Visibility: 50 miles, hazy, smoke layer along/above horizon N-ENE,
visibility NNE-S 35 miles, NW 70 miles
BHO SA 1455 60 SCT E85 BKN 50 263/48/22/2911/031/ THN K LYR ALG HRZN N-ENE
VSBY NNE-S 35 NW 70 HAZY/ 8/070 51014

1 P.M.
Weather: Clear, few stratocumulus distant E-SSW, few altocumulus
distant NE-SE, light haze
Temperature: 57F; Dew Point: 20F; Wind: WSW at 5 kts,
Wind: Light and variable
Sea-level pressure: 30.28 ins. Hg, falling then falling more rapidly
Visibility: 60 miles, light haze
6-hr max temp: 57F
BHO SA 1755 CLR 60 255/57/20/2505/028/ FEW SC DSNT E-SSW FEW AC DSNT NE-SE
LGT HZ VSBY NE-SE 40 WND LGT AND VRB/ 8/570 58008 10057 20043

WEATHER SUMMARY FOR FRIDAY, NOVEMBER 15, 2013

TEMPERATURE (DEGREES F)
MAX…..59    NORMAL…..50
MIN…..38    NORMAL…..34
MEAN….49    NORMAL…..42

DEPARTURE FROM 30-YEAR NORMAL………………….+7
TOTAL DEPARTURE FOR THE MONTH…………………-10 [-0.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..16  DEPARTURE………-7
TOTAL HEATING UNITS FOR THE MONTH………….322  DEPARTURE……..+10 *
TOTAL HEATING UNITS FOR THE SEASON…………799  DEPARTURE……..-76 *
TOTAL HEATING UNITS LAST SEASON TO DATE…….739  DIFFERENCE…….+60

* Monthly and seasonal HDD and departure values corrected from previous
reports.

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………24 S   AT 14:58 P.M.
AERO…………………..25 S   AT 15:02 P.M.
ASOS…………………..26 S   AT 15:07 P.M.
DAVIS………………….25 SSW AT 14:50 P.M. RMY 26
FASTEST MILE FOR YESTERDAY………………..21 S   AT 14:58 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..21 SSW AT 15:08 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….20 SSW AT 14:13 P.M.
AVERAGE WIND SPEED AND DIRECTION…………13.6 SSW
ASOS…………………13.7
DAVIS………………..12.6 SW [218 degrees]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00   DEPARTURE…………-0.16
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.66   DEPARTURE…………-1.70
ASOS…………..0.64
TOTAL PRECIPITATION FOR THE YEAR……….43.67   DEPARTURE…………-2.46 *
ASOS…………..N/A**
**ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals

* Annual precipitation corrected from previous reports.

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…….0.0     DEPARTURE………….-0.1
TOTAL SNOWFALL FOR THE MONTH………….0.2     DEPARTURE………….-0.4
TOTAL SNOWFALL FOR THE SEASON…………0.2     DEPARTURE………….-0.7

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2013 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

11/1  68/56/62/+16/0.10/0.0/012/02        60 SSW AERO N/A N/A    RMY 66
11/2  65/49/57/+11/0.00/0.0/296/48        22 WSW AERO N/A N/A    RMY 23
11/3  49/30/40/-6/0.06/T/135/22           23 N   AERO N/A N/A    RMY N/A
11/4  42/27/35/-10/0.00/0.0/588/96        24 NNE AERO N/A N/A    RMY 25
11/5  50/29/40/-5/0.00/0.0/487/80         16 SSW AERO N/A N/A    RMY 17
11/6  59/40/50/+5/0.00/0.0/419/69         30 SSW AERO 31 MPH SSW RMY 33
11/7  65/37/51/+6/0.31/0.0/079/13         33 SW  AERO 37 MPH SW  RMY 37
11/8  48/31/40/-4/T/T/0.0/421/70          37 WNW AERO 37 MPH WNW RMY 39
11/9  44/29/37/-7/0.00/0.0/366/61         25 WNW AERO 25 MPH WNW RMY 29
11/10 52/40/46/+2/0.08/0.0/108/18         31 WNW AERO 33 MPH WNW RMY N/A
11/11 51/36/44/+1/0.00/0.0/…/..         36 WNW AERO 37 MPH WNW RMY 37
11/12 48/24/36/-7/0.11/0.2/000/00         42 SW  AERO 43 MPH SW  RMY 43
11/13 35/21/28/-15/0.00/0.0/…/..        29 NW  AERO 30 MPH NW  RMY 30
11/14 49/26/38/-4/0.00/0.0/…/..         25 SW  AERO 25 MPH SW  RMY 28
11/15 59/38/49/+7/0.00/0.0/…/..         24 S   AERO 25 MPH S   RMY 26

11/16 morning low temp: 40F; the normal low is now 34F

DAILY RECORDS FOR NOVEMBER 2013
None so far.

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

RECORDS FOR NOVEMBER 16
HIGH 73F IN 1927
LOW 8F IN 1933
PRECIP 2.25 INCHES IN 1981
SNOWFALL 2.0 IN 1913
PEAK GUST 78 S IN 1989

RECORDS FOR NOVEMBER 17
HIGH 74F IN 1928
LOW 10F IN 1924
PRECIP 1.92 INCHES IN 1920
SNOWFALL 1.0 INS IN 1980
PEAK GUST 61 SSE IN 2006

TODAY’S REPORT PREPARED BY: Mike Iacono