Southern Hemisphere GFS Analyses
Dynamic Tropopause / Jet, Thickness, SLP, and Moisture / Divergent Outflow-Jet Interaction / Q Vectors

Northern Hemisphere GFS Analyses
home

Dynamic Tropopause Loops
6-hourly 0.5-deg GFS analyses, except 1.0-deg analyses for dynamic tropopause (1.5-PVU surface, DT) potential temperature and wind
DT (1.5-PVU surface) potential temperature (K; shaded) and wind barbs (knots),
925-850-hPa layer averaged cyclonic relative vorticity (black contours every -0.5 x 10^-4 s^-1)

	South America	Africa	Australia
1 to 15 Jan	x	x	x
7 to 22 Jan	x	x	x
15 to 31 Jan	x	x	x
22 Jan to 7 Feb	x	x	x
1 to 15 Feb	x	x	x
7 to 22 Feb	x	x	x
15 to 28 Feb	x	x	x
22 Feb to 7 Mar	x	x	x
	South America	Africa	Australia
1 to 15 Mar	x	x	x
7 to 22 Mar	x	x	x
15 to 31 Mar	x	x	x
22 Mar to 7 Apr	x	x	x
1 to 15 Apr	x	x	x
7 to 22 Apr	x	x	x
15 to 30 Apr	x	x	x
22 Apr to 7 May	x	x	x
1 to 15 May	x	x	x
7 to 22 May	x	x	x
15 to 31 May	x	x	x
22 May to 7 Jun	x	x	x
1 to 15 Jun	x	x	x
7 to 22 Jun	x	x	x
15 to 30 Jun	x	x	x
22 Jun to 7 Jul	x	x	x
1 to 15 Jul	x	x	x
7 to 22 Jul	x	x	x
	South America	Africa	Australia
15 to 31 Jul	x	x	x
22 Jul to 7 Aug	x	x	x
1 to 15 Aug	x	x	x
7 to 22 Aug	x	x	x
15 to 31 Aug	x	x	x
22 Aug to 7 Sep	x	x	x
1 to 15 Sep	x	x	x
7 to 22 Sep	x	x	x
15 to 30 Sep	x	x	x
22 Sep to 7 Oct	x	x	x
1 to 15 Oct	x	x	x

top

Jet, Thickness, SLP, and Moisture Loops
6-hourly 0.5-deg GFS analyses
250-hPa wind speed (m s^-1, shaded according to color bar), 1000-500 hPa thickness (dashed contours every 6 dam),
SLP (solid contours every 4 hPa), total precipitable water (mm, shaded according to gray scale)

	South America	Africa	Australia
1 to 15 Jan	x	x	x
7 to 22 Jan	x	x	x
15 to 31 Jan	x	x	x
22 Jan to 7 Feb	x	x	x
1 to 15 Feb	x	x	x
7 to 22 Feb	x	x	x
15 to 28 Feb	x	x	x
22 Feb to 7 Mar	x	x	x
	South America	Africa	Australia
1 to 15 Mar	x	x	x
7 to 22 Mar	x	x	x
15 to 31 Mar	x	x	x
22 Mar to 7 Apr	x	x	x
1 to 15 Apr	x	x	x
7 to 22 Apr	x	x	x
15 to 30 Apr	x	x	x
22 Apr to 7 May	x	x	x
1 to 15 May	x	x	x
7 to 22 May	x	x	x
15 to 31 May	x	x	x
22 May to 7 Jun	x	x	x
1 to 15 Jun	x	x	x
7 to 22 Jun	x	x	x
15 to 30 Jun	x	x	x
22 Jun to 7 Jul	x	x	x
1 to 15 Jul	x	x	x
7 to 22 Jul	x	x	x
	South America	Africa	Australia
15 to 31 Jul	x	x	x
22 Jul to 7 Aug	x	x	x
1 to 15 Aug	x	x	x
7 to 22 Aug	x	x	x
15 to 31 Aug	x	x	x
22 Aug to 7 Sep	x	x	x
1 to 15 Sep	x	x	x
7 to 22 Sep	x	x	x
15 to 30 Sep	x	x	x
22 Sep to 7 Oct	x	x	x
1 to 15 Oct	x	x	x

top

Divergent Outflow-Jet Interaction Loops
6-hourly 0.5-deg GFS analyses, except 1.0-deg analyses for irrotational wind field
250-hPa wind speed (m s^-1, shaded according to color bar), 250-hPa potential vorticity (gray contours every -1 PVU),
250-hPa relative humidity (%, shaded according to gray scale), 600-400 hPa layer averaged omega (red contours every 5 x 10^-3 hPa s^-1, neg. values only),
300-200 hPa layer averaged irrotational wind (vectors starting at 5 m s^-1)

	South America	Africa	Australia
1 to 15 Jan	x	x	x
7 to 22 Jan	x	x	x
15 to 31 Jan	x	x	x
22 Jan to 7 Feb	x	x	x
1 to 15 Feb	x	x	x
7 to 22 Feb	x	x	x
15 to 28 Feb	x	x	x
22 Feb to 7 Mar	x	x	x
	South America	Africa	Australia
1 to 15 Mar	x	x	x
7 to 22 Mar	x	x	x
15 to 31 Mar	x	x	x
22 Mar to 7 Apr	x	x	x
1 to 15 Apr	x	x	x
7 to 22 Apr	x	x	x
15 to 30 Apr	x	x	x
22 Apr to 7 May	x	x	x
1 to 15 May	x	x	x
7 to 22 May	x	x	x
15 to 31 May	x	x	x
22 May to 7 Jun	x	x	x
1 to 15 Jun	x	x	x
7 to 22 Jun	x	x	x
15 to 30 Jun	x	x	x
22 Jun to 7 Jul	x	x	x
1 to 15 Jul	x	x	x
7 to 22 Jul	x	x	x
	South America	Africa	Australia
15 to 31 Jul	x	x	x
22 Jul to 7 Aug	x	x	x
1 to 15 Aug	x	x	x
7 to 22 Aug	x	x	x
15 to 31 Aug	x	x	x
22 Aug to 7 Sep	x	x	x
1 to 15 Sep	x	x	x
7 to 22 Sep	x	x	x
15 to 30 Sep	x	x	x
22 Sep to 7 Oct	x	x	x
1 to 15 Oct	x	x	x

top

Q Vector Loops
6-hourly 0.5-deg GFS analyses
700-hPa geo. height (dam; solid blue), temp. (deg C; dashed red),
Q vector (arrows, plotted for values greater than 5 x 10^-7 Pa m^-1 s^-1 only), and
total RHS of the Q-vector form of the QG Omega equation (10^-12 Pa m^-2 s^-1, shaded according to the colorbar)

	South America	Africa	Australia
1 to 15 Jan	x	x	x
7 to 22 Jan	x	x	x
15 to 31 Jan	x	x	x
22 Jan to 7 Feb	x	x	x
1 to 15 Feb	x	x	x
7 to 22 Feb	x	x	x
15 to 28 Feb	x	x	x
22 Feb to 7 Mar	x	x	x
	South America	Africa	Australia
1 to 15 Mar	x	x	x
7 to 22 Mar	x	x	x
15 to 31 Mar	x	x	x
22 Mar to 7 Apr	x	x	x
1 to 15 Apr	x	x	x
7 to 22 Apr	x	x	x
15 to 30 Apr	x	x	x
22 Apr to 7 May	x	x	x
1 to 15 May	x	x	x
7 to 22 May	x	x	x
15 to 31 May	x	x	x
22 May to 7 Jun	x	x	x
1 to 15 Jun	x	x	x
7 to 22 Jun	x	x	x
15 to 30 Jun	x	x	x
22 Jun to 7 Jul	x	x	x
1 to 15 Jul	x	x	x
7 to 22 Jul	x	x	x
	South America	Africa	Australia
15 to 31 Jul	x	x	x
22 Jul to 7 Aug	x	x	x
1 to 15 Aug	x	x	x
7 to 22 Aug	x	x	x
15 to 31 Aug	x	x	x
22 Aug to 7 Sep	x	x	x
1 to 15 Sep	x	x	x
7 to 22 Sep	x	x	x
15 to 30 Sep	x	x	x
22 Sep to 7 Oct	x	x	x
1 to 15 Oct	x	x	x

top