🟡 Moderate

Dense Fog Advisory

Houston; Trinity; Madison; Walker; San Jacinto; Polk; Burleson; Brazos; Washington; Grimes; Montgomery; Northern Liberty; Colorado; Austin; Waller; Inland Harris; Chambers; Wharton; Fort Bend; Inland Jackson; Inland Matagorda; Inland Brazoria; Inland Galveston; Southern Liberty; Coastal Harris; Coastal Jackson; Coastal Matagorda; Coastal Brazoria; Coastal Galveston; Brazoria Islands; Galveston Island; Bolivar Peninsula

Dense Fog Advisory issued December 17 at 8:24PM CST until December 18 at 9:00AM CST by NWS Houston/Galveston TX

Alert Description

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of south central and southeast Texas. * WHEN...Until 9 AM CST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Fog is developing across Southeast Texas this evening, and is beginning to become dense in localized spots. Dense fog is expected to become more widespread across the area through the night and early morning hours on Thursday.

Safety Instructions

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

Time Information

Effective

Dec 18, 2025, 2:24 AM

Expires

Dec 18, 2025, 3:00 PM

Issued

Dec 18, 2025, 2:24 AM

Alert Details

Severity

Moderate

Urgency

Expected

Certainty

Likely

Issued By

NWS Houston/Galveston TX

National Weather Service