textproduct: Tampa Bay Area

KEY MESSAGES

Issued at 838 AM EDT Thu Oct 8 2026

- Coastal flooding of 2 to 4 ft possible for Levy County with 1 to 3 ft possible southward into Hillsborough County Friday into Saturday.

- A Flood Watch is in effect for portions of west central Florida today until midnight. A Marginal risk continues for excessive rainfall with the threat for flooding possible into Saturday.

- Hazardous marine and beach conditions with seas up to 6 to 10 ft and dangerous rip currents Friday and Saturday.

DISCUSSION

Issued at 135 AM EDT Thu Oct 8 2026 Very little change over the past 24 hours as a frontal boundary persists across the central Florida peninsula. W/V imagery continues to show a plume of deep tropical moisture that extends across the Gulf and Florida with PCPW values well above 2.25 inches.

Changes finally within sight as a western Atlantic U/L subtropical ridge will build west toward the Florida peninsula today, and an U/L trough digs over the Appalachians. This will aid in lifting the frontal boundary across the central Florida peninsula north today and tonight. It will also act to lift recently upgraded Hurricane Isaias north toward the north central Gulf on Friday. Both of these features will impact sensible weather across the forecast area over the next couple of days.

A Flood Watch has been issued for the coastal counties from Manatee to Citrus county including Sumter county. Antecedent conditions have become quite saturated in many areas as heavy rainfall has occurred across west central Florida over the past couple of days. Additional showers and thunderstorms are expected to redevelop over the eastern Gulf by sunrise and will again move onshore west central Florida, with additional areas of showers/storms redeveloping throughout the day, mainly along and north of the frontal boundary. Given the deep tropical moisture that remains over the region, locally heavy rain is again expected with many areas receiving an additional 1 to 3 inches, with locally 5+ inches possible where training develops. Highest rainfall totals should again occur near the coast. The best chance for heavy rain will likely be in the St Pete/Tampa area during the morning/early afternoon, shifting north across the nature coast later in the day as the frontal boundary begins to lift north.

On Friday, the frontal boundary will be located across north central Florida. At the same time, Hurricane Isaias is expected to be moving toward the north central Gulf. Boundary layer winds will become southeast across west central and southwest Florida. Deep tropical moisture will remain over the forecast area, however, the increasing southeast flow will create faster moving showers/storms which will decrease the risk for widespread heavy rainfall, although locally heavy rain will remain possible. The showers/storms will have a better chance of producing strong gusty winds. Hurricane Isaias, which will be centered well west of our region, will produce increasing tides along coastal areas with a coastal flood advisory in effect from Yankeetown to Egmont Key Friday through Saturday morning for tides 1 to 3 feet above astronomical values, and a Storm Surge Watch for coastal Levy county for tides 2 to 4 feet above astronomical values. There will also be an increasing risk for dangerous rip currents at area beaches Friday persisting into Saturday.

Deep southerly flow across the forecast on Sunday combined with the continued tropical moisture will generate numerous showers and scattered thunderstorms, mainly during the afternoon hours. Surface high pressure with drier air surface and aloft is expected to advect across the region early next week which will significantly decrease the chance of rain with dew points dropping back into the 60s.

AVIATION

(12Z TAFS) Expect another day with rounds of SHRA off the E Gulf moving ashore for widespread MVFR CIGs/VSBYs and ISOLD TSRA with LCL IFR CIGs/VSBYs will be possible thru 00Z with E-SE surface winds.

MARINE

Issued at 135 AM EDT Thu Oct 8 2026 A frontal boundary is stalled across the central waters, and will begin to lift to the north on Thursday. Numerous to widespread showers and scattered thunderstorms will occur through Thursday. The gradient will continue to tighten with increasing northeast winds today, becoming southeast on Friday, with hazardous conditions for small craft developing through the remainder of the week...with SCA conditions likely late in the week. Large swells will move over the waters late Thursday night and Friday generated by Hurricane Isaias, which will remain well west of the coastal waters. Winds and seas are expected to gradually subside over the weekend. Surface high pressure will build over the waters early next week with benign conditions developing.

FIRE WEATHER

Issued at 135 AM EDT Thu Oct 8 2026 No fire weather hazards are expected through the weekend as deep tropical moisture will keep minimum afternoon relative humidity values well above critical levels.

PRELIMINARY POINT TEMPS/POPS

TPA 81 73 86 77 / 90 60 70 40 FMY 87 75 90 76 / 80 50 60 30 GIF 84 73 90 76 / 100 50 70 30 SRQ 84 73 89 75 / 90 50 60 40 BKV 81 69 88 73 / 90 70 70 40 SPG 82 74 87 77 / 90 60 70 40

TBW WATCHES/WARNINGS/ADVISORIES

FL...Flood Watch through this evening for Coastal Citrus-Coastal Hernando-Coastal Hillsborough-Coastal Manatee-Coastal Pasco- Inland Citrus-Inland Hernando-Inland Hillsborough-Inland Manatee-Inland Pasco-Pinellas-Sumter.

Coastal Flood Advisory from 8 AM Friday to 8 AM EDT Saturday for Coastal Citrus-Coastal Hernando-Coastal Hillsborough- Coastal Pasco-Pinellas.

Storm Surge Watch for Coastal Levy.

Gulf waters...None.