Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

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Last Map Update: Thu, Jun 18, 2026 at 7:26:27 am CDT

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Significant Flash Flooding Risk Increasing Tonight

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Moderate to Major River Flooding

Confidence continues to increase that significant impacts including widespread, life-threatening flash flooding may likely occur from training storms tonight into early Thursday. Noted on the right is a 24 hour forecast rainfall total 7PM Wed thru 7PM Thu - highlighting the areas most likely to see extreme high-end totals of 10-15" and potentially 20+" in some isolated areas.

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Current Weather Observations...

Location	Time (CDT)	Weather	Vsby. (SM)	Temp. (ºF)	Dewpt. (ºF)	Hum. (%)	Wind (mph)	Wind Chill / Heat Index (ºF)	Pres. (in)
Baton Rouge LA	07:02	Thunder In The Vicinity \ Lightning Observed	10	77	75	93	SE 10	-	29.73
Biloxi MS	07:08	Thunder In The Vicinity \ Rain	7	82	77	83	S 14	-	29.80
Gulfport MS	07:10	Thunder In The Vicinity \ Rain \ Mist \ Lightning Observed	5	81	79	93	SSE 14G26	-	29.82
Hammond LA	07:15	Lightning Observed	10	74	74	100	SE 7	-	29.77
Houma LA	06:47	Overcast	7	82	78	88	S 16G24	91 [HI]	29.78
McComb MS	07:10	Lightning Observed	10	75	72	90	SSE 14G21	-	29.78
New Orleans LA	07:02	Mist	5	78	77	96	S 9	-	29.76
Slidell La	07:14	Heavy Rain With Thunder \ Mist \ Lightning Observed	1 1/4	74	73	97	SSE 9	-	29.80

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Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

Weather Forecast Office New Orleans/Baton Rouge