St Marks River at San Marcos State Park (in MHHW)

1. 12.00 ftFlooding of historic proportions. Most of the town of St. Marks floods up to the second story. Water may extend as far inland as Commerce Blvd east of Woodville Highway. Access to areas south of Bloxham Cutoff and east of the Wakulla River will be impossible.
2. 9.00 ftCatastrophic flooding south of US-98 between the Wakulla and St Marks Rivers. Riverside portions of St. Marks will be under 7 feet of water with most of the town flooded up to 5 feet of water. Portions of the town of St Marks will be under water up to 7 feet deep. US-98 will flood in numerous spots between the Wakulla and St Marks Rivers restricting access by motor vehicle.
3. 7.00 ftAccess to Purdom Power Plant becomes restricted above this level. Portions of the plant are prone to flooding at this level. On the west bank of the St Marks River above the town of St Marks, homes not elevated will flood at this level as far as 2 miles north of US-98.
4. 5.00 ftFlood waters inundate much of the town of St Marks south of Sylvania Avenue and Whaley Street. Water depth will be up to 3 feet along portions of Riverside Drive in town.
5. 4.00 ftFlooding expands across City Park Avenue, affecting residences west of Fire Escape Road. Homes in this area not elevated are prone to flooding. Upstream on the St Marks River, homes on the west bank of the river at St Marks Rivers Edge Road and off Old Plank Road experience flooding in their backyard. Homes and structures in these areas not elevated are subject to flooding above this level.
6. 3.50 ftFlooding worsens in the town of St Marks. Flood waters extend more than one quarter mile north of town on Port Leon Drive. Flooding begins to surround residences west of City Park Avenue along the Wakulla River. Structures not elevated are prone to flooding.
7. 3.00 ftRiverside drive floods up to 1 ft deep in spots, affecting businesses near the intersection of Port Leon Drive.
8. 2.40 ftOld Fort Road is completely flooded. Flooding expands across portions of the San Marcos De Apalachee State Park.
9. 2.00 ftWater will flood Old Fort Road beyond the boat ramp for a few hundred yards and be several inches deep.
10. 1.40 ftWater will begin to flood the lower portion of Old Fort Road near the boat ramp.

• St. Marks River at St. Marks (in MHHW)
• St Marks River
• St Marks River
• Wakulla River at Wakulla Springs State Park
• Tide Station at Shell Point (In MHHW)
• Tide Station
• Wakulla River at Wakulla Springs State Park
• St Marks River

Forecasts by the Southeast River Forecast Center. Forecasts are not available. Only observed stages are available for this point. Water levels are referenced to the Mean Higher High Water (MHHW) Datum. This datum can be used to approximate sea water inundation of normally dry ground near the coast. For specific impacts, please refer to the statements on this page.

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service.