Flood Advisory National Weather Service New Orleans LA 1006 AM CST MON DEC 18 2017
LAC005-007-063-093-095-103-105-MSC109-181800- /O.NEW.KLIX.FA.Y.0102.171218T1606Z-171218T1800Z/ /00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ St. John The Baptist LA-Ascension LA-St. James LA-St. Tammany LA- Livingston LA-Tangipahoa LA-Assumption LA-Pearl River MS- 1006 AM CST MON DEC 18 2017
The National Weather Service in New Orleans has issued a
* Urban and Small Stream Flood Advisory for... Central St. John The Baptist Parish in southeastern Louisiana... Southeastern Ascension Parish in southeastern Louisiana... St. James Parish in southeastern Louisiana... Northwestern St. Tammany Parish in southeastern Louisiana... Southeastern Livingston Parish in southeastern Louisiana... Southeastern Tangipahoa Parish in southeastern Louisiana... Northeastern Assumption Parish in southeastern Louisiana... Southwestern Pearl River County in southern Mississippi...
* Until noon CST
* At 1005 AM CST, Doppler radar and automated rain gauges indicated heavy rain due to showers and thunderstorms persisting over the same areas since early this morning. This will cause urban and small stream flooding in the advisory area.
* Some locations that will experience flooding include... Picayune, Covington, Donaldsonville, Poplarville, Napoleonville, Reserve, Laplace, Gramercy, Lutcher, Abita Springs, Madisonville, Sun, Paincourtville, Convent, North Vacherie, Garyville, Wallace, Supreme, Bush and Mcneil.
Please report flooding to your local law enforcement agency when you can do so safely.
A Flood Advisory means river or stream flows are elevated, or ponding of water in urban or other areas is occurring or is imminent.
This Hazardous Weather Outlook is for portions of Southeast Louisiana...South Mississippi and the adjacent coastal waters.
Areas of fog will impact marine areas and land areas near coastal waters overnight. The fog will be dense especially over and near lakes, rivers, bayous, and other bodies of water. Therefore, a Dense Fog Advisory has been issued across marine areas near the coast and land areas adjacent to coastal waters through Tuesday morning.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday
A cold front is expected to push through the area Wednesday morning. Scattered thunderstorms will be possible late Tuesday night ahead of this front. A few strong storms may contain gusty winds. However, these storms should remain below severe storm criteria. Organized severe thunderstorms are not expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not anticipated at this time.
Mesoscale Discussion 1798 NWS Storm Prediction Center Norman OK 0444 PM CST Tue Dec 19 2017
Areas affected...East TX and extreme Northwest LA
Concerning...Severe potential...Watch possible
Valid 192244Z - 192345Z
Probability of Watch Issuance...40 percent
SUMMARY...Isolated tornado threat will exist along a corridor from near CLL to SHV this evening.
DISCUSSION...Strong mid-level height falls are spreading into the Arklatex region ahead of a pronounced short-wave trough that is ejecting across west TX. In response to this feature, a weak surface low has developed over central TX and will track toward TXK by 20/06z. Warm sector is recovering across east TX where temperatures have warmed into the mid 70s and dew points are approaching 70f ahead of aforementioned surface wave. While low-level lapse rates are not that steep, frontal convergence is more than adequate for convective development this evening, aided in large part by the short wave. Radar data suggests a corridor of convection is slowly maturing/deepening from near CLL to GGG and the strongest activity could attain supercell characteristics as 500mb jet, on the order of 80kt, translates across this region. If supercells develop there is some risk for a tornado or two but confidence in appreciable severe is not particularly great at this time. If/when confidence increases this area would be addressed with greater severe probs and possibly a watch.
Tornado Warning National Weather Service Shreveport LA 705 PM CST TUE DEC 19 2017
The National Weather Service in Shreveport has issued a
* Tornado Warning for... Southwestern Rusk County in northeastern Texas... Northwestern Nacogdoches County in eastern Texas... Central Cherokee County in northeastern Texas...
* Until 745 PM CST
* At 705 PM CST, a severe thunderstorm capable of producing a tornado was located near Rusk, moving northeast at 45 mph.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely.
* This dangerous storm will be near... Rusk around 710 PM CST. Ponta around 725 PM CST. Sacul around 735 PM CST. New Salem around 740 PM CST.
Other locations impacted by this tornadic thunderstorm include Reklaw, Cushing and Gallatin.
TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris.