National Weather Service United States Department of Commerce

Strong storm system to bring unsettled weather from Gulf Coast to Great Lakes through Wednesday

A strong storm system will bring potential for severe weather, heavy rainfall and flooding, and heavy snow from the Gulf Coast to the Great Lakes through Wednesday. Severe storms are possible Tuesday across the Gulf Coast states with damaging winds as the primary threat, however a tornadoes cannot be ruled out. Flash flooding is also possible across parts of the Southeast through Wednesday.
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Hazardous Weather Conditions

Last Update: 335 PM CST MON DEC 22 2014

View Nearby Observations

Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM

Marine Zone Forecast

SEAS ARE PROVIDED AS A RANGE OF THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES...ALONG WITH THE OCCASIONAL HEIGHT OF THE AVERAGE HIGHEST TEN PERCENT OF THE WAVES.

...SMALL CRAFT EXERCISE CAUTION IN EFFECT FROM 9 PM CST THIS EVENING THROUGH TUESDAY MORNING...

  • SynopsisA STRONG COLD FRONT WILL APPROACH THE WESTERN COASTAL WATERS LATE TUESDAY AND MOVE ACROSS THE COASTAL WATERS TUESDAY NIGHT. ONSHORE FLOW WILL INCREASE TO MODERATE LEVELS TODAY IN RESPONSE TO THIS FRONTAL ZONE APPROACH. COLD HIGH PRESSURE WILL THEN BUILD INTO THE GULF OF MEXICO POST-FRONTAL PASSAGE THROUGH WEDNESDAY BEFORE SETTLING OVER THE GULF STATES THURSDAY.
  • Tonight South winds 15 knots. Seas 3 to 5 feet dominant period 6 seconds. Chance of showers and thunderstorms.
  • Tuesday South winds 15 to 20 knots. Seas 3 to 5 feet dominant period 6 seconds building to 4 to 7 feet with occasional seas to 8 feet dominant period 6 seconds in the afternoon. Showers and thunderstorms.
  • Tuesday Night West winds 20 to 25 knots. Seas 6 to 10 feet with occasional seas to 11 feet dominant period 8 seconds. Showers and thunderstorms in the evening...then showers and thunderstorms likely after midnight. Chance of showers and thunderstorms after midnight.
  • Wednesday Northwest winds 20 to 25 knots. Seas 6 to 10 feet with occasional seas to 11 feet dominant period 8 seconds.
  • Wednesday Night Northwest winds 20 to 25 knots. Seas 4 to 7 feet with occasional seas to 9 feet dominant period 8 seconds.
  • Thursday North winds 10 to 15 knots becoming northeast near 5 knots late in the afternoon. Seas 3 to 6 feet with occasional seas to 6 feet dominant period 8 seconds subsiding to 2 to 4 feet dominant period 8 seconds in the afternoon.
  • Thursday Night Southeast winds 10 to 15 knots. Seas 1 to 2 feet dominant period 7 seconds.
  • Friday Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Slight chance of showers in the afternoon.
  • Friday Night Southeast winds 10 to 15 knots. Seas 2 to 4 feet. Chance of showers.
  • Saturday Northeast winds 5 to 10 knots. Seas 2 to 4 feet. Chance of showers.
  • Saturday Night Northeast winds 10 to 15 knots. Seas 2 to 4 feet. Chance of showers.



Additional Forecasts and Information

Zone Area Forecast for Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM
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