Marine Weather and Tide Forecast for Norco, LA

LONG TERM
(Thursday night through Tuesday)
Issued at 300 AM CDT Wed May 14 2025

Upper ridging becomes centered over the Gulf Friday and remains there through most or all of next week. A northern stream shortwave flattens it somewhat over the lower Mississippi River Valley on Saturday, and again around the middle of next week. That could push a frontal boundary far enough southward to potentially produce isolated showers or storms over southwest Mississippi Saturday afternoon, but that is pretty much the only chance of precipitation across our area of responsibility over the next 7 days.

Temperature-wise...welcome to summer. Above normal temperatures are expected through the period with highs in the lower 90s across most of the area away from the immediate coast. Overnight lows will be mainly in the 70s. Those readings are generally 5 to 8 degrees above normal, and there really wasn't a good reason to make significant changes to the NBM temperature forecasts.

AVIATION
(18Z TAFS)
Issued at 1232 PM CDT Wed May 14 2025

A dry and stable airmass across the area will keep VFR condiitons in place through at least 06z at all of the terminals. However, an inversion will reform tonight as temperatures cool, and this will allow for redevelopment of a low stratus deck at all of the terminals between 06z and 14z. Ceilings will dip to between 1000 and 1500 feet resulting in prevailing MVFR and fuel alternate restrictions. However, further strengthening of the inversion at MCB where boundary layer winds are expected to be weakest should allow for IFR ceilings of 300 to 800 feet to form. Some fog may also develop and briefly reduce visibilities to 2 to 3 miles, but the low ceilings have a higher probability of occurrence. After 14z, drier air will rapidly mix into the boundary layer and prevailing VFR conditions are expected to be in place at all of the terminals by 16z.

AVIATION
(12Z TAFS)
Issued at 632 AM CDT Wed May 14 2025

Patches of ceilings around FL015 should mix out or lift to FL030 or above by mid-morning at all terminals. Most of the afternoon will see VFR conditions at all terminals. Winds are likely to be gusty at most terminals with sustained winds around 15 knots and gusts to 22 to 25 knots. Those winds should relax somewhat around sunset but not go completely calm. MVFR to IFR ceilings will again be possible between about 08z and 14z Thursday.

MARINE
Issued at 300 AM CDT Wed May 14 2025

Will keep the Small Craft Advisory and Small Craft Exercise Caution headlines in place over the western waters through 18z today. May need another round of SCEC headlines overnight tonight into Thursday. For most of the remainder of the forecast period, winds should generally be in the 10 to 15 knot range, give or take a couple knots.

PRELIMINARY POINT TEMPS/POPS
MCB 68 91 71 91 / 0 0 0 0 BTR 70 90 74 91 / 0 0 0 0 ASD 71 91 73 90 / 0 0 0 0 MSY 73 89 75 89 / 0 0 0 0 GPT 73 85 73 85 / 0 0 0 0 PQL 71 84 72 85 / 0 0 0 0

LIX WATCHES/WARNINGS/ADVISORIES
LA...None.
GM...Small Craft Advisory until 1 PM CDT this afternoon for GMZ550- 570.

MS...None.
GM...Small Craft Advisory until 1 PM CDT this afternoon for GMZ570.