Wednesday, November 27, 2013

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, NOVEMBER 27, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME

GALES, WARM TEMPERATURES AND HEAVY RAIN

SSE-VEERING TO S WINDS GUSTING OVER 60 MPH
TEMPERATURE HITS 61 DEGREES
RAINFALL REACHES 2.04 INS. THRU 1 P.M.
NEW DAILY RAINFALL RECORD FOR NOVEMBER 27

Strong to gale force south-southeast veering to south winds
were increasing early today and peak gusts of 63 to 72
MPH have been recorded between 7 and 8 A.M. on our various
wind systems.

Maximum, Inc. Maestro 72 MPH
Maximum, Inc. Merlin  67 MPH SSE
Aerovane              68 MPH SSE (7:30 A.M.)
RM Young              67 MPH
Davis                 63 MPH S   (7:42 A.M.)
NWS ASOS              63 MPH SSS (7:30 A.M.)
420C                  63 MPH SSE (7:30 A.M.)

Temperatures have risen from 32F 24 hours ago to 58F by
8 a.m. this morning; the record high for this date is 68F
in 1896. The maximum through 1 p.m. was 61 degrees.

The greatest rainfall rainfall since September 1 (2.32 inches)
is in progress and has totaled 2.04 inches (1 P.M.)  since
precipitation began as some light ice pellets late Tuesday
afternoon.
A new daily rainfall record has been established but not
finalized with 2.04 inches as of early this afternoon.
previously 1.92 inches in 1898.

Today’s Observations:

7 A.M.
Weather: Overcast stratus fractus, moderate rain and fog,
rain occasionally light rain
Temperature: 56F; Dew Point: 56F; Wind: SSE at 27G48 kts.
Wind: Peak wind 48 kts from SSE at 6:53 A.M.
Wind: Direction variable SE to S
Sea-level pressure: 29.49 ins. Hg, falling rapidly then more slowly
Visibility: 2 miles, moderate rain and fog
24-hr precip: 0.84 in.
24-hr snowfall: Trace
6-hr min temp: 44F
BHO SA 1155 E6 OVC 2RF 985/56/56/1627G48/949/ R OCNL R-
PK WND 1648/53/ WND 13V19/ 8/7// 56092 ASOS 60063 MANUAL 6062/
ASOS 70083 MANUAL 70083 10056 20044

10 A.M.
Weather: Overcast stratus fractus, light rain and fog
Temperature: 60F; Dew Point: 60F; Wind: S at 30G43 kts,
Wind: Peak wind 47 kts from S at 9:28 A.M.
Sea-level pressure: 29.39 ins. Hg, falling then more slowly
Visibility: 2 miles, light rain and flog
3-hr precip: 0.51 in.
BHO SA 1455 E7 OVC 2R- 953/60/60/1830G43/939/ PK WND 1747/28
WND 14V20/ 8/7// 56032 ASOS 60050 MANUAL 6051/

1 P.M.
Weather: Stratus drifting over summit, scattered variable to
broken stratus fractus, overcast nimbostratus, light rain and fog
Temperature: 60F; Dew Point: 60F; Wind: S at 15 kts,
Sea-level pressure: 29.33 ins. Hg, falling then more slowly
Visibility: 3/4 mile variable 1/4 to 1.5 miles
Visibility SSE-W 1 mile
6-hr max temp: 61F
6-hr rainfall: 1.20 ins.
Event total: 2.04 ins.
BHO SA 1755 7V SCT E25 OVC 3/4VR-F 931/60/60/1815/933/ 7 SCT V BKN
STRA DRFTG OVR SMT VSBY 1/4V11/2 VSBY SSE-W 1 R+ PST HR/
8/72/ 56022 ASOS 60125 MANUAL 60120 EVENT 2.04/ 10061 20056

WEATHER SUMMARY FOR TUESDAY, NOVEMBER 26, 2013

TEMPERATURE (DEGREES F)
MAX…..42    NORMAL…..46
MIN…..29    NORMAL…..30
MEAN….36    NORMAL…..38

DEPARTURE FROM 30-YEAR NORMAL………………….-2
TOTAL DEPARTURE FOR THE MONTH…………………-26 [-1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..29  DEPARTURE………+2
TOTAL HEATING UNITS FOR THE MONTH………….613  DEPARTURE……..+26
TOTAL HEATING UNITS FOR THE SEASON………..1090  DEPARTURE……..-61
TOTAL HEATING UNITS LAST SEASON TO DATE……1020  DIFFERENCE…….+70

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………25 SW  AT  3:07 A.M.
AERO…………………..27 SW  AT  3:03 A.M. *
ASOS…………………..29 SW  AT  2:43 A.M.
DAVIS………………….25 SSW AT 12:00 A.M. RMY 28
FASTEST MILE FOR YESTERDAY………………..19 SW  AT  4:11 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..20 SW  AT  4:13 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….19 SSW AT  1:02 A.M.
AVERAGE WIND SPEED AND DIRECTION…………11.6 SW
ASOS…………………11.9
DAVIS………………..10.7 S [190 degrees] * last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M… 0.84   DEPARTURE…………+0.68
ASOS…………..0.83
TOTAL PRECIPITATION FOR THE MONTH……….2.07   DEPARTURE…………-2.04
ASOS…………..2.05
TOTAL PRECIPITATION FOR THE YEAR……….45.08   DEPARTURE…………-2.80
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…..Trace     DEPARTURE………….-0.2
TOTAL SNOWFALL FOR THE MONTH………….0.2     DEPARTURE………….-1.5
TOTAL SNOWFALL FOR THE SEASON…………0.2     DEPARTURE………….-1.8

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/…./T/000/00           25 SW  AERO 27 MPH SW  RMY 28

11/27 morning low temp: 42F since midnight; the normal low is now 30F

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 27
HIGH 68 IN 1896
LOW 5 IN 1932
PRECIP 1.92 INS IN 1898
SNOWFALL 16.0 INS IN 1898
PEAK GUST 68 NW IN 1997

RECORDS FOR NOVEMBER 28
HIGH 70 IN 1990
LOW 10 IN 1901,1930,1936
PRECIP 1.84 INCHES IN 1889
SNOWFALL 3.0 INS IN 1917
PEAK GUST 90 SSW IN 1958

TODAY’S REPORT PREPARED BY: Robert Skilling