Severe Weather and Heavy Rain from the Ohio Valley to the Mid-Atlantic; Heat Persists in the South-Central U.S.

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected across portions of the Ohio Valley into southern Mid-Atlantic and Carolinas. Rounds of strong thunderstorms are expected to develop across the northern and central Plains. Sweltering heat remains most persistent across the South-Central Plains and Lower/Middle Mississippi Valley through next week. Read More >

A La Niña Watch has been issued by the Climate Prediction Center. There is a 50-55% chance of La Niña conditions developing this fall and continuing through the winter.

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Below is a map of the typical effect La Niña has on the November-March temperatures in the United States. The yellow and orange colors indicate areas where temperatures often average warmer than normal during a La Niña winter:

La Nina temperature anomalies

Here is a map showing the typical effect La Niña has on November-March precipitation. The blue and green colors in the Ohio Valley indicate a tendency toward wetter than normal conditions:

La Nina precipitation anomalies

It is important to remember:

The influence of La Niña on the Ohio Valley is not very strong
Every La Niña is different, and not all La Niña winters behave the same way
The strength of the La Niña may make a difference in how it affects our weather both in terms of precipitation and temperature (so far, this La Niña is expected to be weak)
There are myriad factors that work together to result in the weather we experience -- La Niña is just one of them

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Severe Weather and Heavy Rain from the Ohio Valley to the Mid-Atlantic; Heat Persists in the South-Central U.S.

La Nina Watch