The Small-Scale New England Coastal Bomb of 9 December 2005: A Near-Miss Hurricane Zeta? - PowerPoint PPT Presentation

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The Small-Scale New England Coastal Bomb of 9 December 2005: A Near-Miss Hurricane Zeta?

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Title: The Small-Scale New England Coastal Bomb of 9 December 2005: A Near-Miss Hurricane Zeta?


1
The Small-Scale New England Coastal Bomb of 9
December 2005 A Near-Miss Hurricane Zeta?
by
  • Lance F. Bosart
  • Department of Earth and Atmospheric SciencesThe
    University at Albany/SUNY1400 Washington
    AvenueAlbany, NY 12222

Eighth Northeast Regional Operational Workshop
Albany, New York,Wednesday, November 1,
2006Help provided by Tom Galarneau, Matt
Greenstein, Kevin Tyle and Celeste Iovinella
Research support was provided by NSF grant
ATM-9413012 and CSTAR grant NA04NWS4680005
2
The 9 Dec'05 Storm Motivation
  • Deepened rapidly and more than anticipated.
  • Significant mesoscale structure was observed.
  • Some tropical-like" structure was present.
  • Jet-cyclone interactions appeared to be two-way.

3
Outline
  • Background information.
  • Satellite and radar perspective.
  • Surface and upper-air overview.
  • Mesoscale overview.
  • Summary and conclusions.

4
(No Transcript)
5
Snowfall Totals (inches) 9 Dec 2005
6
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE
TAUNTON MA 250 AM EST FRI DEC 9 2005 CROSS
SECTIONS STILL SHOW TREMENDOUS MID LEVEL
FRONTOGENESISIN THIS REGION WITH EXCELLENT
POTENTIAL FOR SLANTWISE CONVECTION/MESOSCALE
BANDING. THIS IS ALSO ZONE OF MAXIMUM SNOW
GROWTH. ONLY LIMITING FACTOR TO MAKING THIS
ABLOCKBUSTER EVENT CONTINUES TO BE SPEED OF
SYSTEM...SO ALTHOUGH IT'S GOING TO SNOW HARD FOR
SEVERAL HOURS FROM MIDMORNING INTO EARLY
AFTERNOON WITH SNOWFALL RATES OF 2" PER
HOUR...IT SHOULD NOT LAST LONG ENOUGH TO GIVE
WIDESPREAD TOTALS OVER 10". WE'LL PROBABLY GET
SOME THUNDER/LIGHTNINGREPORTS WITH THIS AS WELL.
7
Outline
  • Background information.
  • Satellite and radar perspective.
  • Surface and upper-air overview.
  • Mesoscale overview.
  • Summary and conclusions.

8
1545 UTC 9 Dec 2005
9
1745 UTC 9 Dec 2005
10
1945 UTC 9 Dec 2005
11
(No Transcript)
12
1154 UTC 9 Dec 2005
13
1254 UTC 9 Dec 2005
14
1354 UTC 9 Dec 2005
15
1454 UTC 9 Dec 2005
16
1554 UTC 9 Dec 2005
17
1654 UTC 9 Dec 2005
18
1754 UTC 9 Dec 2005
19
1854 UTC 9 Dec 2005
20
1918 UTC 9 Dec 2005
21
1954 UTC 9 Dec 2005
22
2054 UTC 9 Dec 2005
23
Outline
  • Background information.
  • Satellite and radar perspective.
  • Surface and upper-air overview.
  • Mesoscale overview.
  • Summary and conclusions.

24
Source http//www.atmos.albany.edu/facstaff/rmct
c/DTmaps/animSelect.php
25
Source http//www.atmos.albany.edu/facstaff/rmct
c/DTmaps/animSelect.php
26
Source http//www.atmos.albany.edu/facstaff/rmct
c/DTmaps/animSelect.php
27
Source http//www.atmos.albany.edu/facstaff/rmct
c/DTmaps/animSelect.php
28
Source http//www.atmos.albany.edu/facstaff/rmct
c/DTmaps/animSelect.php
29
Source http//www.atmos.albany.edu/facstaff/rmct
c/DTmaps/animSelect.php
30
Source http//www.atmos.albany.edu/facstaff/rmct
c/DTmaps/animSelect.php
31
Source http//www.atmos.albany.edu/facstaff/rmct
c/DTmaps/animSelect.php
32
Source http//www.atmos.albany.edu/facstaff/rmct
c/DTmaps/animSelect.php
33
Source http//www.atmos.albany.edu/facstaff/rmct
c/DTmaps/animSelect.php
34
Outline
  • Background information.
  • Satellite and radar perspective.
  • Surface and upper-air overview.
  • Mesoscale overview.
  • Summary and conclusions.

35
(No Transcript)
36
1200 UTC 9 December 2005
37
1500 UTC 9 December 2005
38
1800 UTC 9 December 2005
39
2000 UTC 9 December 2005
40
Source http//www.ndbc.noaa.gov/station_realtime
.php?stationBUZM3
41
(No Transcript)
42
(No Transcript)
43
18 UTC 9 Dec 2005
positive negative

1 h total 173000-182959 UTC
44
19 UTC 9 Dec 2005
positive negative

1 h total 183000-192959 UTC
45
20 UTC 9 Dec 2005
positive negative

1 h total 193000-202959 UTC
46
21 UTC 9 Dec 2005
positive negative

1 h total 203000-212959 UTC
47
1730 UTC 9 Dec 2005
48
1730 UTC 9 Dec 2005
49
1800 UTC 9 Dec 2005
50
Source Matthew Greenstein
1800 UTC 9 Dec 2005
51
Summary and Conclusions
  • Example of explosive secondary cyclogenesis.
  • High shear environment associated with a strong
    jet.
  • Low CAPE environment associated with steep lapse
    rates aloft.
  • Small elevated CAPE likely due to warm air
    crossing jet axis.
  • Jet reconfigures in response to rapidly deepening
    storm.
  • Frontogenetical forcing helps to maintain strong
    mesoscale snowband.
  • Coastal front ahead of cyclone center evolves
    into a bent-back front.
  • Cyclone had some attributes of a developing
    tropical storm.
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