Flash Flood Warning Issued for St. Tammany Parish LA and Southern Mississippi
This alert is no longer in effect.
NOAA issued it on July 21, 2026, 4 weeks ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS New Orleans has issued a Flash Flood Warning for southeastern St. Tammany Parish in Louisiana and parts of Hancock, Harrison, and Pearl River Counties in Mississippi until 2:30 PM CDT.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Southeastern Louisiana and Southern Mississippi
- Issued
- July 21, 2026
- Issuing authority
- NWS New Orleans LA
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 4 weeks ago; use the issuing agency's live warning service for current conditions in Southeastern Louisiana and Southern Mississippi.
Alert Details
Flash Flood Warning issued by NWS New Orleans LA. Effective from June 18 at 11:31 AM CDT until June 18 at 2:30 PM CDT. Severity: Severe. Urgency: Immediate. Certainty: Likely.
Affected Areas
Southeastern St. Tammany Parish in southeastern Louisiana; Hancock County in southern Mississippi; Northern Harrison County in southern Mississippi; Southeastern Pearl River County in southern Mississippi. Specific locations include Slidell, Diamondhead, Eden Isle, Pearl River, Kiln, Stennis Space Center, Mcneil, Pearlington, Lyman, Saucier and Slidell Airport.
What You Should Do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Stay away or be swept away. River banks and culverts can become unstable and unsafe. Please report observed flooding to local emergency services or law enforcement.
Expected Conditions
At 11:31 AM CDT, emergency management reported multiple floods impassable due to flooding across rural Hancock, northwest Harrison, and Pearl River Counties. Between 8 and 12 inches of rain have fallen. Additional rainfall amounts of 2 to 6 inches are possible. Life-threatening flash flooding is already occurring. Hazard: Life threatening flash flooding from thunderstorms.
Timeline
Alert effective June 18 at 11:31 AM CDT. Expires and ends June 18 at 2:30 PM CDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,353 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to July 21, 2026.
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