Marine Weather and Tide Forecast for Grenada, MS

DISCUSSION
Issued at 343 AM CDT Mon Apr 28 2025

Today through Wednesday: Early morning satellite imagery/RAP analysis showed the circulation around a 591dam high centered over old Mexico that was ridging to the northeast across the mid Mississippi valley and Great Lakes region. This feature was resulting in northwest flow aloft across our CWA Early morning surface analysis had a >1022mb high ridging to the west across the northern Gulf. This feature was resulting in a light southeast to southerly flow. With only a few high thin cirrus topping the ridge axis, patchy fog development is expected toward morning in the east and south where the greatest rainfall occurred Sunday. Dry weather and continued warmer than normal temperatures are expected today through Wednesday. However, there are a few models that suggest low chances of a few showers/thunderstorms over east central Mississippi late afternoon into early evening. With the mid level ridge shifting east over our CWA today combined with the surface ridge from the east, near record afternoon highs around 90F are expected. Tuesday wl still have surface ridging from the east but the mid level ridge will shift east of Mississippi resulting in lower heights and a southwest flow aloft across our CWA Afternoon highs will top out a couple degrees cooler Tuesday than today. Dry weather is expected to continue Wednesday but wl start to see the influence of the first of several northern stream shortwave troughs that wl be swinging through the region through the end of the week.

Wednesday night through next weekend: The first shortwave trough is expected to swing across the region Wednesday night into Thursday morning. This will bring a return of rain chances to our northwest after midnight Wednesday night that will expand through the rest of the CWA Thursday. This initial shortwave trough will help support a weak cold front drop into our CWA Thursday. There does appear to be enough favorable environmental parameters to support at least a low chance of severe storms along and ahead of the cold front Thursday.
A more potent shortwave will drop out of the northern Plains Friday morning. This shortwave will help push the cold front south of our CWA by Saturday morning. It's possible that additional severe storms may develop over our CWA Friday into Friday night along and ahead of the cold front. These potential severe storm events are still several days away and wl refrain from introducing any graphics with this fcst package. In the wake of the cold front, a >1020mb surface high and shortwave ridging aloft will shift east across our region Saturday and Saturday night. By Sunday morning both ridging surface and aloft will be to our east while the third shortwave trough in the series approaches from the west. This shortwave trough will bring an increase in rain chances by Sunday afternoon that will likely continue into Sunday night. /22/

AVIATION
(18Z TAFS)
Issued at 1226 PM CDT Mon Apr 28 2025

VFR conditions will prevail at all sites through most of the TAF period. Southerly winds will prevail with winds gusting up to 15-20mph at times this afternoon into early evening. By 10Z Tuesday morning southern TAF sites will be impacted by low stratus/BR and lowered visibilities as flight categories drop to IFR to LIFR. Conditions and categories should improve by 14-15Z./KP/



PRELIMINARY POINT TEMPS/POPS
Jackson 67 88 67 88 / 0 0 0 0 Meridian 64 88 65 88 / 0 0 0 10 Vicksburg 68 87 68 87 / 0 0 0 0 Hattiesburg 65 89 66 89 / 0 0 0 10 Natchez 68 86 67 86 / 0 0 0 0 Greenville 69 86 69 86 / 0 0 0 0 Greenwood 69 87 68 88 / 0 0 0 0

JAN WATCHES/WARNINGS/ADVISORIES
MS...None.
LA...None.
AR...None.