My Home > Global Maps > Regional Maps

Hovmoller Plots

Overview

All fields are generated using the NCAR Command Language (NCL). No guarantees are made on the availability of these images. This page is meant to be an "expert's resource" it should not be used for decision-making by non-qualified individuals. This page is supported by the National Science Foundation. Gridded fields are taken from the 0.5° GFS model. The precipitation data for analysis and archived images comes from the real-time version of NASA’s TRMM Multisatellite Precipitation Analysis (TMPA, TRMM product 3B42RT) although does lag behind the GFS grids by ~12h. Anomalies are calculated with respect to the first four harmonics of the seasonal cycle using the ERA-Interim Reanalysis 1989-2009. Send questions or comments to Matthew Janiga. Everything but the rainfall hovs are updating again.

Longitude-Time Hovmoller Plots

700 hPa Relative Vorticity

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

10ºN-20ºN

X

X

X

X

5º-15ºN

X

X

X

X

0º-10ºN

X

X

X

X

850 hPa Relative Vorticity

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

10ºN-20ºN

X

X

X

X

5º-15ºN

X

X

X

X

0º-10ºN

X

X

X

X

925 hPa Relative Vorticity

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

10ºN-20ºN

X

X

X

X

5º-15ºN

X

X

X

X

0º-10ºN

X

X

X

X

700 hPa Curvature Vorticity

30 Day Raw

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

10ºN-20ºN

X

X

X

X

5º-15ºN

X

X

X

X

0º-10ºN

X

X

X

X

700 hPa Meridional Wind

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

X

X

X

X

10ºN-20ºN

X

X

X

X

X

X

X

X

5º-15ºN

X

X

X

X

X

X

X

X

0º-10ºN

X

X

X

X

X

X

X

X

850 hPa Meridional Wind

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

X

X

X

X

10ºN-20ºN

X

X

X

X

X

X

X

X

5º-15ºN

X

X

X

X

X

X

X

X

0º-10ºN

X

X

X

X

X

X

X

X

700 hPa Zonal Wind

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

X

X

X

X

10ºN-20ºN

X

X

X

X

X

X

X

X

5º-15ºN

X

X

X

X

X

X

X

X

0º-10ºN

X

X

X

X

X

X

X

X

850 hPa Zonal Wind

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

X

X

X

X

10ºN-20ºN

X

X

X

X

X

X

X

X

5º-15ºN

X

X

X

X

X

X

X

X

0º-10ºN

X

X

X

X

X

X

X

X

200 hPa Stream Function

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

X

X

X

X

10ºN-20ºN

X

X

X

X

X

X

X

X

5º-15ºN

X

X

X

X

X

X

X

X

0º-10ºN

X

X

X

X

X

X

X

X

500 hPa Stream Function

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

10ºN-20ºN

X

X

X

X

5º-15ºN

X

X

X

X

0º-10ºN

X

X

X

X

700 hPa Stream Function

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

X

X

X

X

10ºN-20ºN

X

X

X

X

X

X

X

X

5º-15ºN

X

X

X

X

X

X

X

X

0º-10ºN

X

X

X

X

X

X

X

X

850 hPa Stream Function

30 Day Raw

30 Day Anomalies

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

10ºN-20ºN

X

X

X

X

5º-15ºN

X

X

X

X

0º-10ºN

X

X

X

X

200 hPa Velocity Potential

30 Day Raw

30 Day Anom

90 Day Raw

90 Day Anom

160°W–60°E

160°W–60°E

15ºN-25ºN

X

X

X

X

10ºN-20ºN

X

X

X

X

5º-15ºN

X

X

X

X

0º-10ºN

X

X

X

X

Rain Rate

30 Day Raw

90 Day Raw

EPAC

Atlantic

Africa

160°W–60°E

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

X

X

X

X

X

X

X

X

10ºN-20ºN

X

X

X

X

X

X

X

X

5º-15ºN

X

X

X

X

X

X

X

X

0º-10ºN

X

X

X

X

X

X

X

X

Rain Rate and 700 hPa Relative Vorticity

30 Day Raw

EPAC

Atlantic

Africa

160°W–60°E

15ºN-25ºN

10ºN-20ºN

5º-15ºN

0º-10ºN

Questions or Comments? Contact Matthew Janiga.
Back to Homepage

Last Update Jul 27, 2010