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TRMM 3B42 Rain Rate Time-Longitude Plots

Regional time–longitude rainfall plots
 o   Time–longitude plots of rainfall for each region, averaged over the indicated 10° latitude bands
 o   Includes TMPA rainfall rates for the last 30 days and 0.5° GFS forecasts for the next 7 days
 o   Updated daily at 1200 UTC 

                                   Indian Ocean                    West Pacific                   East Pacific                 Atlantic                     Africa                       Global
                               20°E–120°E                       100°E–160°W                 180°–80°W                   100°W–0°                 40°W–60°E                   0-360°E
20°N – 30°N            total    anom                     total    anom                 total    anom             total    anom           total    anom              total    anom
10°N – 20°N            total    anom                     total    anom                 total    anom             total    anom           total    anom              total    anom
Eq – 10°N               total    anom                     total    anom                 total    anom             total    anom           total    anom              total    anom
5°S – 5°N                total    anom                    total    anom                 total    anom             total    anom           total    anom              total    anom
10°S – Eq               total    anom                     total    anom                 total    anom             total    anom           total    anom              total    anom
20°S – 10°S            total    anom                     total    anom                 total    anom             total    anom           total    anom              total    anom
30°S – 20°S            total    anom                     total    anom                 total    anom             total    anom           total    anom              total    anom



West African Plot and 700 Meridional Wind (V) 
o   Time–longitude plots of rainfall for West Africa
o   Includes TMPA rainfall rates for the last 30 days and 0.5° GFS forecasts for the next 7 days
o   Includes 700 hPa 1°  GFS analyses for meridional wind.
o   Contour interval is 0.5 m/s, ending at 7 m/s; contours have been smoothed.
o   Updated daily at 1200 UTC 

5°N – 15°N                      total


90-day Global Time–Longitude Plots
o   Time–longitude plots of rainfall and winds, averaged over the indicated 10° latitude bands.
o   Rainfall plots use TMPA data for the last 90 days
o   Wind plots use 1° GFS analyses for the last 90 days
o   Updated daily at 1200 UTC 

                                  TRMM Rain Rate               850 hPa Meridional Wind              
20°N – 30°N                    total    anom                             total    anom             
10°N – 20°N                    total    anom                             total    anom              
Eq – 10°N                       total    anom                             total    anom              
5°S – 5°N                       total    anom                             total    anom              
10°S – Eq                       total    anom                             total    anom            
20°S – 10°S                    total    anom                             total    anom              
30°S – 20°S                    total    anom                             total    anom     

850 hPa Global Zonal Wind Time–Longitude Plots
o   Time–longitude plots of 850 hPa U for each region, averaged over the indicated latitude bands
o   GFS forecast attached to 30 Day plots

                                                    30 Day                                      90 Day              
20°N – 30°N                          total    anom                                         total    anom                             
10°N – 20°N                           total    anom                                         total    anom                                                
Eq – 10°N                               total    anom                                         total    anom                                        
5°S – 5°N                                total    anom                                        total    anom                                              
10°S – Eq                               total    anom                                         total    anom                                            
20°S – 10°S                           total    anom                                         total    anom                                         
30°S – 20°S                           total    anom                                         total    anom    


200 hPa Global Zonal Wind Time–Longitude Plots
o   Time–longitude plots of 200 hPa U for each region, averaged over the indicated latitude bands
o   GFS forecast attached to 30 Day plots

                                          30 Day                                     90 Day              
20°N – 30°N                    total    anom                              total    anom                                  
10°N – 20°N                    total    anom                              total    anom                                                
Eq – 10°N                       total    anom                              total    anom                                                
5°S – 5°N                       total    anom                              total    anom                                                
10°S – Eq                       total    anom                              total    anom                                              
20°S – 10°S                    total    anom                              total    anom                                             
30°S – 20°S                    total    anom                              total    anom          
          

200 hPa Global Velocity Potential Time–Longitude Plots
o   Time–longitude plots of velocity potential for each region, averaged over the indicated latitude bands 
o   GFS forecast attached to 30 Day plots
                                          30 Day                                        90 Day              
20°N – 30°N                    total    anom                                   total    anom                                                          
10°N – 20°N                    total    anom                                   total    anom                                                                        
Eq – 10°N                       total    anom                                          total    anom                                                                          
5°S – 5°N                        total    anom                                  total    anom                                                                      
10°S – Eq                       total    anom                                   total    anom                                                                          
20°S – 10°S                    total    anom                                   total    anom                                                                  
30°S – 20°S                    total    anom                                  total    anom        


850 hPa Global Velocity Potential Time–Longitude Plots
o   Time–longitude plots of velocity potential for each region, averaged over the indicated latitude bands 
o   GFS forecast attached to 30 Day plots
                                          30 Day                                            90 Day              
20°N – 30°N                    total    anom                                   total    anom                                                          
10°N – 20°N                    total    anom                                   total    anom                                                                        
Eq – 10°N                       total    anom                                   total    anom                                                                          
5°S – 5°N                        total    anom                                   total    anom                                                                      
10°S – Eq                       total    anom                                    total    anom                                                                          
20°S – 10°S                    total    anom                                    total    anom                                                                  
30°S – 20°S                    total    anom                                    total    anom        
                                                  
                                                                                                                        
200 hPa Meridional Wind:  Extra-tropical wave trains
o   Time–longitude plots of meridional wind for both hemispheres, averaged over the indicated latitude bands 
o  GFS forecast attached to 30 Day plots

                                                      30 Day                                          90 Day              
30°N – 60°N                              total    anom                                               total    anom                                                          
30°S – 60°S                              total    anom                                               total    anom                                                                                                                                                                                                                                                                                                                      

o   The precipitation data comes from the real-time version of NASA’s TRMM multisatellite precipitation analysis (TMPA, TRMM product 3B42RT).
o   Forecast data and 850-hPa wind analyses come from NCEP’s GFS model.  
o   Anomalies are calculated by subtracting the first four harmonics of the annual cycle.  The annual cycle for precipitation is calculated from the research on of the NASA TRMM 3B42 (1998–2008), and the cycle for 850-hPa winds are calculated from ERA-interim reanalyses (1989–2008).
o   All plots are made using NCAR Command Language (NCL).
o   This website is supported by funding from the NASA Grant NNX09AD08G.