National Weather Service United States Department of Commerce

Severe Weather Outbreak in the Deep South; Excessive Rainfall and Flooding in the Tennessee and Ohio Valleys

A severe weather outbreak, including the potential for violent, long-track tornadoes, is expected today across the Central Gulf States and portions of the Deep South. A rare High Risk (level 5 of 5) of severe thunderstorms is in effect. Across the Tennessee and Ohio Valleys, heavy to excessive rainfall will bring the potential for flash and river flooding today into Sunday. Read More >


28-day Mississippi River Forecast Plots

 

These experimental plots were created as a way to display long range (28-day) forecasts which became part of daily operations at LMRFC in November of 2016. The official forecast (2 days of QPF) is displayed along with an experimental, raw model NAEFS-based forecast (16 days of QPF).

 


NEXRAD ZR Relationship Table

 

This table displays the radar reflectivity to rain rate relationships being used by each of the NEXRAD radar sites in the LMRFC area. Local weather forecast offices will change this relationship seasonally and by rainfall event to help improve radar estimates of rainfall.

 


MRMS Rainfall Diagnostics

 

Plots displaying diagnostics for the MRMS radar-only rainfall estimate product. The plots were developed as a tool for monitoring biases in radar-only products.