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TOHSEP Mar 03 2024 4022 Views

NWS Update Concerning Heavy Rain/Severe Weather March 4-5

Here is an update from the National Weather Service in New Orleans concerning the heavy rain and severe weather Monday and Tuesday (March 4 and 5).

Overview:

WHAT:  Locally Heavy Rain that could lead to flash flooding (main threat.  A few severe thunderstorms also possible (secondary threat).

WHEN: Monday afternoon through Tuesday afternoon.

WHERE: All of southeastern Louisiana and southern Mississippi, with the greatest threat currently expected across areas near and south of the Interstate 10/12 corridor.

CONFIDENCE·   

  •   We have high confidence in the occurrence of widespread showers and thunderstorms, and that some will produce heavy rainfall.
  • We have low to medium confidence in details such as the exact rainfall amounts and the area of greatest risk. This lower confidence could lead to additional changes in future forecasts.
  • We have low confidence that any storms will become severe.

Impacts:

Potential impacts from heavy rain:

  • 3 to 6 inches of rain is currently forecast for areas along/south of the I-10/12 corridor, with short-term rainfall rates of 2-3 inches per hour possible
  • Ponding of water in low lying areas and areas of poor drainage can be expected from the heaviest rainfall
  • Localized flash flooding will be possible in areas that receive the heaviest rain, and some roads may become impassable
  • If the heaviest rain occurs farther north, area rivers and streams across the north shore and Mississippi Coast may experience rises

Potential impacts from any severe thunderstorms:

  • Wind gusts greater than 60 mph will be possible and could damage trees and powerlines
  • Large hail up to 1 inch in diameter is also possible

Additional Information and Resources:

NWS New Orleans Website: www.weather.gov/neworleans

NWS New Orleans DSS Website: https://www.weather.gov/lix/embrief

River Gauges and Forecasts: http://water.weather.gov/ahps2/index.php?wfo=lix

NWS New Orleans Facebook: www.facebook.com/NWSNewOrleans

NWS New Orleans Twitter: https://twitter.com/NWSNewOrleans

Online Weather Reporting: https://www.weather.gov/lix/submit_storm_report