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Louisiana Monsoon Monday – 3 inches of rain per hour possible

Several of Louisiana’s largest cities, namely New Orleans, Baton Rouge and Lafayette, could all experience heavy rain showers during the day on Monday. The threat of heavy rain is so pronounced that the Weather Prediction Center, whose mission is to “defend the operational forecasting of rain storms…for the protection of life and property” has put these cities and surrounding areas at risk for “excessive rainfall for at least the next 24 hours.

Live and locally via YouTube

Live and locally via YouTube

Excessive rainfall occurs when rainfall exceeds the drainage capacity of a specific area. In the Lafayette area, we have been informed informally that our municipal drainage system is designed to handle a rain rate of two inches per hour, but only over a short period of time.

Parish news via YouTube

Parish news via YouTube

The longer the heavy rain lasts or the heavier the precipitation rates are, that’s when motorists start seeing scenes like those of a recent storm on Ambassador Caffery Parkway in Lafayette a few months ago.

The Weather Prediction Center has determined that the area south of I-10/1-12 and east of I-49/US 90 is at a slight risk of a tropical downpour, or perhaps more than one during the day today. Below is a graphical illustration of the WPC’s prospects. The rest of the coastal areas and much of central Louisiana have a similar risk, but that level of risk is assessed as marginal.

spc.ncep.noaa.gov

spc.ncep.noaa.gov

In a statement from the Weather Prediction Center, forecasters made this statement about the possible rain showers the area could experience today. Below is the part of the statement that seems most difficult.

short-term rainfall rates very late tonight into early
Monday morning, up to 3" in an hour.

The Weather Prediction Center statement suggested isolated rain amounts of two to three inches could be possible over the course of several hours. Such amounts would not be widespread, but the possibility of localized flooding due to a heavy tropical downpour cannot be excluded.

GeeBigSup via YouTube

GeeBigSup via YouTube

The catalyst for the heavy rain is a developing weather system in the southwestern Gulf of Mexico. That system has already led to heavy rainfall on Mexico’s Yucatán Peninsula. National Hurricane Center forecasters believe the system will move into the southwestern Gulf of Mexico, the Bay of Campeche, over the next 24 hours. From there, the system has been given an above-average chance of developing into at least a tropical depression.

Predictions about the eventual path of this system, should it develop, are uncertain at this time, but as of now the biggest concern for coastal and inland Louisiana is the potential for flooding rains. Rain chances will remain high in the I-10 corridor at least through Wednesday, but there is a chance of showers and thunderstorms throughout the area for the rest of the work week.

Those who live or have interests in low-lying areas prone to rapidly rising waters should remain weather aware in the coming days as tropical downpours with rainfall rates of more than an inch per hour are possible through Wednesday could be.

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Several factors, such as the risk of natural disasters, the condition of the property and personal characteristics, determine how much you pay for home insurance. And although Louisianans pay about $100 more than the national average, below are the five cheapest homeowners insurers in the state.