Foggy 'Morn; Storms on Wed. Evening

After last night’s drought buster, the next big weather event will be a good chance of dense fog tomorrow morning. In early Spring, anytime you have light southerly winds develop bringing warm Gulf air over cold Lake and Sound water, fog is a good bet. Having saturated soils is a lagniappe for fog lovers. The threat should last just one night since winds will pick up turning the fog into a low cloud deck Tuesday morning.

After that, the next threat is a line of storms Wednesday evening after 7PM. This ECMWF surface map shows the storms (yellows and reds) along with a developing low in Northern Louisiana. That pattern spells severe thunderstorms, probably further north of here in Mississippi and Alabama, but we’ll look at it again for our Tuesday evening newsletter.

Then, after the front moves through, Thursday and Friday will feature noticeably less humidity. The good news on the long-range is that we are done with frosts for this winter. The bulk of any remaining cold air outbreaks in late March should stay well northeast of us in the Ohio Valley and Mid-Atlantic states.

The Foreca graphic highlights the next significant rainfall Wednesday evening along with a lovely, less humid spell from Thursday - Saturday. My take is that rainfall amounts Wednesday evening will only be a few tenths of an inch to a half inch because the storms will be moving quickly. Also, there’s a chance of some scattered afternoon showers tomorrow (Monday) afternoon, especially in Washington and Tangipahoa Parishes, but amounts will be light.

Expect a stretch of nice weather without any rain from this Friday March 13 - Sunday March 22. Here’s the ECMWF forecast highs and lows for the six days following the Foreca graphic. Notice that after a brief cool down for Tuesday March 17, highs jump to about 80, and low temperatures ( a measure of humidity) increase through this period.