Friday, November 29, 2013

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, NOVEMBER 29, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME

CHILLY, DRY, AND CALM

The day started out with a low of 21F, which is several degrees below the
30-year average for the date. Despite plenty of sunshine, the afternoon
high has only managed to reached the lower 30s. Like yesterday, today’s
average temperature will likely end up about 10 degrees below normal.

Winds are much lower today compared to the past two days, and have
generally been in the 5-15 mph range, with a few gusts this afternoon
near 20 mph.

November is ending on a chilly note, and the month appears as though it
will end about 1.5 degrees below average.

It appears as though the month will end with both a rainfall and snowfall
deficit.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus (2 levels), few cumulus distant NE-E-S,
lower altocumulus mostly ENE-SE-SW, few altocumulus lenticularis
SW-NW-ENE
Temperature: 21F; Dew Point: 14F; Wind: WNW at 6 kts,
Wind: Direction gradually veering (clockwise) over the past hour
Sea-level pressure: 30.52 ins. Hg, rising
Visibility: 75 miles
6-hr min temp: 21F
BHO SA 1155 90 SCT 110 SCT 75 335/21/14/2906/052/ FEW CU DSNT NE-E-S LWR
AC MSTLY ENE-SE-SW FEW ACSL SW-NW-ENE WND GRDLY VEERING PST HR/ 8/140
52016 10023 20021

10 A.M.
Weather: Scattered altocumulus, few cumulus distant NE-ESE, altocumulus
mostly distant ENE-SW and few altocumulus W-N, light distant haze
Temperature: 28F; Dew Point: 14F; Wind: NW at 6 kts,
Wind: Direction variable WNW-N
Sea-level pressure: 30.57 ins. Hg, rising then rising more slowly
Visibility: 75 miles, light distant haze
BHO SA 1455 110 SCT 75 352/28/14/3206/057/ FEW CU DSNT NE-ESE AC MSTLY
DSNT ENE-SW AND FEW AC W-N LGT DSNT HZ WND 29V35/ 8/140 51017

1 P.M.
Weather: Scattered cumulus/cumulus fractus, scattered altocumulus, cumulus/
cumulus fractus all quadrants, altocumulus distant SE, light distant haze
Temperature: 31F; Dew Point: 13F; Wind: WNW at 7 kts,
Wind: Direction variable WSW-NNW
Sea-level pressure: 30.55 ins. Hg, falling then rising
Visibility: 75 miles, light distant haze
6-hr max temp: 33F
BHO SA 1755 45 SCT 110 SCT 75 344/31/13/3007/055/ SML CU/CUFRA ALQDS
FEW AC DSNT SE LGT DSNT HZ WND 26V33/ 8/140 55008 10033 20021

WEATHER SUMMARY FOR THURSDAY, NOVEMBER 28, 2013

TEMPERATURE (DEGREES F)
MAX…..35 NORMAL…..45
MIN…..21 NORMAL…..30
MEAN….28 NORMAL…..38

DEPARTURE FROM 30-YEAR NORMAL…………………-10
TOTAL DEPARTURE FOR THE MONTH…………………-26 [-1.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..37 DEPARTURE……..+10
TOTAL HEATING UNITS FOR THE MONTH………….667 DEPARTURE……..+25
TOTAL HEATING UNITS FOR THE SEASON………..1144 DEPARTURE……..-61
TOTAL HEATING UNITS LAST SEASON TO DATE……1086 DIFFERENCE…….+58

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………43 W AT 12:05 P.M. *
AERO…………………..46 W AT 4:30 A.M.
ASOS…………………..46 WNW AT 10:24 A.M.
DAVIS………………….44 WNW AT 1:10 P.M. RMY 45
FASTEST MILE FOR YESTERDAY………………..34 WNW AT 1:01 P.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..35 W AT 12:06 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….32 W AT 12:06 P.M.
AVERAGE WIND SPEED AND DIRECTION…………18.9 W
ASOS…………………17.1
DAVIS………………..16.1 W [278 degrees] * last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M… 0.00 DEPARTURE…………-0.17
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.59 DEPARTURE…………-0.85
ASOS…………..3.60
TOTAL PRECIPITATION FOR THE YEAR……….46.60 DEPARTURE…………-1.61
ASOS…………..N/A**
** ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…….0.0 DEPARTURE………….-0.2
TOTAL SNOWFALL FOR THE MONTH………….0.2 DEPARTURE………….-1.8
TOTAL SNOWFALL FOR THE SEASON…………0.2 DEPARTURE………….-2.1

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/+1/0.00/0.0/500/84 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/-15/0.00/0.0/591/100 29 NW AERO 30 MPH NW RMY 30
11/14 49/26/38/-4/0.00/0.0/536/91 25 SW AERO 25 MPH SW RMY 28
11/15 59/38/49/+7/0.00/0.0/393/67 24 S AERO 25 MPH S RMY 26
11/16 59/40/50/+8/0.00/0.0/363/62 20 WSW AERO 20 MPH WSW RMY N/A
11/17 59/42/51/+10/0.07/0.0/000/00 23 SSE AERO 25 MPH SSE RMY N/A
11/18 65/46/56/+15/0.28/0.0/400/69 40 SSW AERO 40 MPH S RMY N/A
11/19 46/28/37/-4/0.00/0.0/428/74 46 WNW AERO 46 MPH WNW RMY 46
11/20 40/25/33/-7/0.00/0.0/…/.. 23 NW AERO 22 MPH NW RMY 22
11/21 46/26/36/-4/0.00/0.0/…/.. 16 SW AERO 16 MPH SW RMY N/A
11/22 46/39/43/+3/0.22/0.0/…/.. 17 WSW AERO 18 MPH SW RMY 19
11/23 46/27/37/-2/0.00/0.0/…/.. 40 WNW AERO 44 MPH WNW RMY 48
11/24 27/17/22/-17/0.00/0.0/…/.. 53 NW AERO 59 MPH NW RMY 57
11/25 32/14/23/-16/0.00/0.0/…/.. 29 W AERO 29 MPH WNW RMY N/A
11/26 42/29/36/-2/0.13/T/000/00 25 SW AERO 27 MPH SW RMY 28
11/27 61/34/48/+10/2.23/0.0/000/00 63 SSE AERO 68 MPH SSE RMY 67
11/28 35/21/28/-10/0.00/0.0/…/.. 43 W AERO 46 MPH W RMY 45

11/29 morning low temp: 21F; the normal low is now 29F

DAILY RECORDS FOR NOVEMBER 2013
11/27 – NEW RECORD MAXIMUM DAILY PRECIPITATION OF 2.23 INCHES;
surpasses the previous record of 1.92 inches in 1898

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

RECORDS FOR NOVEMBER 29
HIGH 66 IN 2011
LOW 6 IN 1901
PRECIP 2.69 INCHES IN 1963
SNOWFALL 6.0 INS IN 2012
PEAK GUST 86 SSE IN 1963

RECORDS FOR NOVEMBER 30
HIGH 67 IN 2006
LOW 7 IN 1887, 1929
PRECIP 2.42 INCHES IN 1944
SNOWFALL 10.2 INS IN 1945
PEAK GUST 90 SSW IN 1963

TODAY’S REPORT PREPARED BY: Sean Fankhauser