Tropical Cyclone Genesis Pathway Diagnostics

2007 North Atlantic Hurricane Season

Thomas J. Galarneau, Jr.

 

All diagnostics are generated using the 0.5° NCEP–GFS analyses, and focus on the genesis time period.

 

2007 North Atlantic Hurricane Season Storm Tracks

 

 

1. 850 hPa streamfunction (m2 s−1), nondivergent wind (kt), and coupling index[*] (K)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

2. 700 hPa streamfunction (m2 s−1), nondivergent wind (kt), and coupling index (K)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

3. 400–200 hPa layer-averaged streamfunction (m2 s−1), nondivergent wind (kt), and 850–700 hPa layer-averaged relative vorticity (10−5 s−1)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

4. 400–200 hPa layer-averaged streamfunction (m2 s−1), [†],  (m kg–1 s–1), and 900–400 hPa vertically-averaged relative humidity (%)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

5. DT[‡] pressure (hPa), DT–850 hPa wind shear (kt), and 925–850 hPa layer-averaged ζ (10−5 s−1)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

6. DT pressure (hPa), wind (kt), and 850–700 hPa layer-averaged ζ (10−5 s−1)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

7. DT potential temperature (K), wind (kt), and 850–700 hPa layer-averaged ζ (10−5 s−1)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

8. 1000–700 hPa thickness (dam), layer-averaged wind (kt), and layer-averaged ζ (10−5 s−1)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

9. Precipitable water (mm), 250 hPa geopotential height (dam), 700 hPa ζ (10−5 s−1), and 850–500 hPa layer-averaged wind (kt)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

10. Sea-level pressure (hPa), 1000–500 hPa thickness (dam), 300 hPa wind speed (m s−1)

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

11. Vertical profile of Zmax–Zmin within 1000 km2 of the NHC best track position.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

12. Time series of  between 600 and 900 hPa within 1000 km2 of the NHC best track position.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

13. Time-height diagram of Zmax–Zmin within 1000 km2 of the NHC best track position.

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  10  15

 

 

Letter  Name                                                  NHC Best Track                   

Declared Tropical

A         Subtropical Storm Andrea                    9–11 May

B          Tropical Storm Barry                            1–2 June

C         Tropical Storm Chantal                         31 July–1 August

D         Hurricane Dean                                    13–23 August

E          Tropical Storm Erin                              15–17 August

F          Hurricane Felix                                     31 August–September 5

G         Tropical Storm Gabrielle                       8–11 September

H         Hurricane Humberto                             12–14 September

I           Tropical Storm Ingrid                            12–17 September

J           Tropical Storm Jerry                             23–24 September

K         Hurricane Karen                                   25–29 September

L          Hurricane Lorenzo                                25–28 September

M         Tropical Storm Melissa                         28–30 September

N         Hurricane Noel                                     28 October–2 November

O         Tropical Storm Olga                             11–12 December

10        Tropical Depression 10                         21–22 September

15        Tropical Depression 15                         12–17 October


[*] The coupling index is defined as  (Bosart and Lackmann 1995).

[†] The Q-vectors are calculated using the nondivergent wind as in McTaggart-Cowan et al. (2008).

[‡] The dynamic tropopause (DT) is defined at the 2.0 PVU surface.