When it rains it pours, goes the saying, and for the last 15 years, the data on tropical rainfall have poured in. NASA's Tropical Rainfall Measuring Mission (TRMM) was launched on Nov. 27, 1997, and for the last decade and a half has enabled precipitation science that has had far reaching applications across the globe.
2012 Western Atlantic Tropical Cyclone Rainfall Measured From Space JacobAdmin Fri, 11/30/2012
The TRMM satellite has now been making highly accurate measurements of rainfall from space for fifteen years. TRMM can be used to calibrate rainfall estimates from other additional satellites. Those Rainfall data (3B42) are routinely created and stored at the Goddard Space Flight Center. The TRMM-based, near-real time Multi-satellite Precipitation Analysis (TMPA) at the NASA Goddard Space Flight Center can be used to analyze rainfall over a wide portion of the globe. The TMPA analysis above shows the estimated amount of rain contributed by named tropical cyclones over the western Atlantic in
A combination of heavy rains and a large snow melt has put parts of the central US at risk for record flooding this spring with several locations along the Mississippi already at or near record levels. One likely culprit is La Nina. Despite the fact that the current La Nina appears to be winding down, it's effects in the atmosphere can persist for a while. Furthermore, although not every La Nina brings major flooding to the region, La Nina's are conducive for above-normal rainfall from East Texas and northern Louisiana up through Arkansas and the Tennessee and Ohio Valleys with below-normal