Monday, November 25, 2013
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, NOVEMBER 25, 2013
ALL TIMES ARE IN EASTERN STANDARD TIME
UNSEASONABLY COLD EARLY SEASON ARCTIC AIR MASS
BRINGS NEAR RECORD COLD MAXIMUM TEMPERATURE SUNDAY
WEST-NORTHWEST TO NORTHWEST WINDS GUST OVER 50 MPH
DEW POINT TEMPERATURES DROP TO NEGATIVE SINGLE NUMBERS
An unusually strong Arctic high pressure system which was
centered along the North Dakota-Canada border early Saturday morning
had a central pressure of 1050 millibars or 31.00 inches.
Low temperatures dropped to 22 below zero in North Dakota certainly
unusually cold even for that location this early in the season.
The Arctic cold front moved through New England Saturday night.
Here at the Observatory temperatures fell to 27 degrees by
midnight Saturday which actually became the high for Sunday,
yesterday, November 24, when the record low maximum was just
one degree below that reading at 26 degrees November 24, 1936.
Actually the coldest maximum temperature this early in the
season is 21 on November 23, 1888. Yesterday’s daytime afternoon
maximum was 26 degrees.
Dew points continued in single numbers below zero today, most
unusual for November. Relative humidity dropped to 20 to 25%.
Today’s Observations:
7 A.M.
Weather: Scattered altocumulus lenticularis, scattered cirrus,
thin scattered cirrus, few stratocumulus distant S offshore,
all clouds NW-E except distant stratocumulus S
Temperature: 14F; Dew Point: -2F; Wind: WNW at 12 kts.
Wind: Gust to 20 kts past hour
Sea-level pressure: 30.33 ins. Hg, increasing then more rapidly
Visibility: 75 miles, light distant haze
6-hr min temp: 14F
BHO SA 1155 180 SCT 220 SCT 250 -SCT 75 270/14/-2/2912/033/
FEW SC DSNT S ALG HRZN PTCHS ACSL NW-E CLDS AC/CI ALL NW-E
LGT DSNT HZ GST 20 KTS PST HR WNDCHILL ZERO/ 8/541 52022
10017 20014
10 A.M.
Weather: Clear, few altocumulus/altocumulus lenticularis distant
WSW-NW, few cirrus distant SSW-W
Temperature: 22F; Dew Point: -5F; Wind: WNW at 11 kts.
Sea-level pressure: 30.37 ins. Hg, increasing then increasing more slowly
Visibility: 80 miles
BHO SA 1455 CLR 80 283/22/-5/2911/037/ FEW AC/ACSL DSNT WSW-NW FEW
CI DSNT SSW-W LGT DSNT HZ WND 26V33/ 8/041 51013
1 P.M.
Weather: Clear, few altocumulus lenticularis distant WNW,
cirrus mostly distant SE-SW-NW
Temperature: 30F; Dew Point: -6F; Wind: WNW at 12 kts,
Wind: Direction variable W-NNW
Sea-level pressure: 30.34 ins. Hg, falling then more slowly
Visibility: 80 miles
BHO SA 1755 CLR 80 274/30/-6/3012/034/ FEW ACSL DSNT WNW CI MSTLY
DSNT SE-SW-NW WND 26V33/8/041 56009 10031 20014
WEATHER SUMMARY FOR SUNDAY, NOVEMBER 24, 2013
TEMPERATURE (DEGREES F)
MAX…..27 NORMAL…..47
MIN…..17 NORMAL…..31
MEAN….22 NORMAL…..39
DEPARTURE FROM 30-YEAR NORMAL…………………-17
TOTAL DEPARTURE FOR THE MONTH…………………-10 [-0.6 DEGREE/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..43 DEPARTURE……..+17
TOTAL HEATING UNITS FOR THE MONTH………….544 DEPARTURE……..+10
TOTAL HEATING UNITS FOR THE SEASON………..1021 DEPARTURE……..-76
TOTAL HEATING UNITS LAST SEASON TO DATE…….960 DIFFERENCE…….+61
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………53 NW AT 3:34 P.M.
AERO…………………..59 NW AT 3:34 P.M.
ASOS…………………..58 NW AT 3:35 P.M.
DAVIS………………….54 W AT 2:33 P.M. RMY 57
FASTEST MILE FOR YESTERDAY………………..42 NW AT 2:41 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..38 NW AT 3:36 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….36 WNW AT 2:41 P.M.
AVERAGE WIND SPEED AND DIRECTION…………24.8 WNW
ASOS………………….23.5
DAVIS…………………21.2 WNW [300 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……….1.23 DEPARTURE…………-2.56
ASOS…………..1.22
TOTAL PRECIPITATION FOR THE YEAR……….44.24 DEPARTURE…………-3.32
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………….-1.2
TOTAL SNOWFALL FOR THE SEASON…………0.2 DEPARTURE………….-1.5
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 N/A
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 morning low temp: 14F; the normal low is now 31F
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 25
HIGH 71 IN 1979
LOW 13 IN 1938
PRECIP 3.10 INCHES IN 1983
SNOWFALL 8.0 INS IN 1888
PEAK GUST 94e E IN 1950
RECORDS FOR NOVEMBER 26
HIGH 66 IN 1979
LOW 6 IN 1938
PRECIP 2.22 INS IN 1888
SNOWFALL 3.0 INS IN 1974
PEAK GUST 78 SSE IN 1964
TODAY’S REPORT PREPARED BY: Robert Skilling
