News Alert: Situational Awareness Report 27 December 2015 as of 3:30 pm
Posted: 12/29/2015 6:02:35 PM
Louisiana Business Emergency Operations Center

Situational Awareness Report

27 December 2015

As of  3:30 pm


State EOC Activation Level: CAT (Crisis Action Team)

WebEOC Incident Name: 15-045 Severe Weather — Statewide — 27 December 2015



Situation -  A strong cold front moving through Texas this morning will move down and into southeast Texas and then on into Southern Louisiana today. This front will bring showers and thunderstorms with the possibility of producing heavy rainfall, isolated tornadoes and damaging winds. Please stay tuned to your local National Weather Service for the latest advisories, watches and warnings. 


North Louisiana - Showers and thunderstorms will continue to slowly spread over the area along and near a cold front moving slowly across the region today. Training of the storms will produce locally heavy rainfall which could produce amounts of 1 to 4 inches and result in ponding of water in streets, low lying and poor drainage areas. Some flash flooding may result. Due to a sharp temperatures gradient between the cold air arriving and the warm and moist air feeding into the area, there will be severe thunderstorms possible, capable of producing high and damaging winds and isolated tornadoes with a chance for large hail as well. There will also be strong and gusty surface winds today and tonight due to a pressure gradient between high pressure to the east and surface low pressure over south Texas and along the trough of low pressure with the cold front. Showers and thunderstorms will be ending Monday as the cold front and surface low pressure system shift away from the area allowing drier air and cooler temperatures to move into the region.


Central/Southwest Louisiana - This latest front will bring the threat of isolated tornadoes and damaging winds. Periods of heavy rainfall and numerous cloud to lightening strikes in stronger storms should be expected. Temperatures will fall rapidly behind the front this evening with morning lows tomorrow in the 40's. Most of the storm activity will be out of south central Louisiana around midnight. Cold air will continue spilling into the region on Tuesday into Wednesday with another round of storms expected Wednesday with another front pushing down and through the region.


Southeast Louisiana - There is a slight risk of severe thunderstorms tonight for the entire outlook area west of the US Highway 49 corridor. A squall line associated with a cold front will be capable of producing heavy rainfall and wind gusts of 40 to 60 MPH as it moves wast through the area overnight. The squall line should be near the Atchafalaya and Mississippi River Basin around 11:00 pm tonight, the Greater Baton Rouge area around midnight, the I-55 corridor around 1:00 am, Greater New Orleans area between 2:00 am and 4:00 am, Pearl River Basin around 3:00 am to 5:00 am and the Gulfport/US 49 corridor around 6:00 am. Southerly flow will be increasing throughout the day over the coastal waters, becoming hazardous for mariners. Small craft should exercise caution today and tonight on the tidal lakes and sounds. A Small Craft Advisory is in effect for the open coastal waters through tonight for strong south winds shifting to strong west winds overnight. There is a slight risk of severe thunderstorms east of the US 49 corridor through mid morning Monday for anticipated ongoing squall line passage between 6:00 am and 9:00 am. Small Craft Advisories will likely be posted for Monday. Another strong cold front will likely prompt another strong cold front will likely prompt another Small Craft Advisory issuance Wednesday and Thursdayfor strong north winds and rough seas.


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