Alert archive / Florida / Flash Flood Warnings in 2025

Flash Flood Warning 5, NWS Tampa Bay, FL

August 18, 2025Sumter County, Florida

NWS Tampa Bay, FL issued this flash flood warning at Aug 18, 2025, 7:36 PM EDT for Sumter County, Florida. It was in force for 84 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 18, 2025, 7:36 PM EDT (23:36 UTC)
Expired: Aug 18, 2025, 9:00 PM EDT
In force: 84 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon
Flood severity: None

County Sumter County, FL

The radar

The Tampa radar (KTBW), 116 km from the middle of the area, began a volume at 23:38 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 11.6 hours before the alert went out and 116 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1511 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1027 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tampa Bay, FL wrote its last area forecast discussion before this flash flood warning went out at Aug 18, 1:51 PM EDT, 5 hours 45 minutes earlier.

Area forecast discussion, Aug 18, 1:51 PM EDT, 5 hours 45 minutes before

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In the hours before

Local storm report, Aug 18, 2:19 PM EDT, 5 hours 17 minutes before

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Special weather statement, Aug 18, 3:49 PM EDT, 3 hours 47 minutes before

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Special weather statement, Aug 18, 5:19 PM EDT, 2 hours 17 minutes before

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Special weather statement, Aug 18, 6:28 PM EDT, 1 hour 8 minutes before

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The office that day

Everything else NWS Tampa Bay, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 3:49 PM EDT	Special Weather Statement	TBW	Polk	41 min
Aug 18, 5:19 PM EDT	Special Weather Statement	TBW	Levy	41 min
Aug 18, 6:28 PM EDT	Special Weather Statement	TBW	Sumter	47 min
Aug 18, 6:56 PM EDT	Areal Flood Advisory	TBW	Citrus, Sumter	94 min

Nearby

Flash Flood Warnings in Florida, 2025 Every flash flood warning in 2025

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.