A squall line formed well ahead of a cold front and produced strong marine thunderstorm winds across the coastal waters on the afternoon of the 14th. A secondary line then developed in the early morning hours of the 15th, just ahead of the front, and again produced strong marine winds as well as a waterspout.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 15-MAY-11 03:12:00 to 15-MAY-11 03:12:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS Station at Tampa International Airport measured a wind gust of 38 knots.

Marine Thunderstorm Wind in ENGLEWOOD TO TARPON SPRINGS FL OUT 20NM, GULF OF MEXICO
From 14-MAY-11 14:42:00 to 14-MAY-11 14:42:00 (EST-5)
Location: VENICE
Magnitude: 45.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

The C-MAN Station at Venice Beach measured a wind gust of 45 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:24:00 to 14-MAY-11 13:24:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS Station at the Tampa International Airport measured a wind gust of 43 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:34:00 to 14-MAY-11 13:34:00 (EST-5)
Location: MIDDLE TAMPA BAY
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS Station at the Albert Whitted Airport measured a wind gust of 35 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:35:00 to 14-MAY-11 13:35:00 (EST-5)
Location: LOWER TAMPA BAY
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The C-CUT PORTS Station measured a wind gust of 40 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:35:00 to 14-MAY-11 13:35:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The PORTS Station at Old Port Tampa measured a wind gust of 38 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:42:00 to 14-MAY-11 13:42:00 (EST-5)
Location: HILLSBOROUGH BAY
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The PORTS Station at Berth 223 measured a wind gust of 38 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:42:00 to 14-MAY-11 13:42:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The PORTS Station at Old Port Tampa measured a wind gust of 42 knots.

Marine Thunderstorm Wind in ENGLEWOOD TO TARPON SPRINGS FL OUT 20NM, GULF OF MEXICO
From 14-MAY-11 15:04:00 to 14-MAY-11 15:04:00 (EST-5)
Location: VENICE
Magnitude: 46.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

The C-MAN Station at Venice Beach measured a wind gust of 46 knots.

Marine Thunderstorm Wind in BONITA BEACH TO ENGLEWOOD FL OUT 20NM, GULF OF MEXICO
From 14-MAY-11 15:43:00 to 14-MAY-11 15:43:00 (EST-5)
Location: GASPARILLA PASS
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS Station at the Charlotte County Airport measured a wind gust of 38 knots.

Marine Thunderstorm Wind in BONITA BEACH TO ENGLEWOOD FL OUT 20NM, GULF OF MEXICO
From 14-MAY-11 15:47:00 to 14-MAY-11 15:47:00 (EST-5)
Location: GASPARILLA PASS
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS Station at the Charlotte County Airport measured a wind gust of 40 knots.

Waterspout in BONITA BEACH TO ENGLEWOOD FL OUT 20NM, GULF OF MEXICO
From 15-MAY-11 06:00:00 to 15-MAY-11 06:02:00 (EST-5)
Location: CHARLOTTE HARBOR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter and boat captain reported a waterspout near the Boca Grande Pass.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 15-MAY-11 02:59:00 to 15-MAY-11 02:59:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS Station at MacDill Air Force Base measured a wind gust of 37 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 15-MAY-11 03:12:00 to 15-MAY-11 03:12:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The PORTS Station at Old Port Tampa measured a wind gust of 42 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:11:00 to 14-MAY-11 13:11:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 39.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS Station at the Saint Petersburg-Clearwater International Airport measured a wind gust of 39 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:47:00 to 14-MAY-11 13:47:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 48.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The PORTS Station at Old Port Tampa measured a wind gust of 48 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:52:00 to 14-MAY-11 13:52:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 66.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The PORTS Station at Old Port Tampa measured a wind gust of 66 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:47:00 to 14-MAY-11 13:47:00 (EST-5)
Location: HILLSBOROUGH BAY
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The PORTS Station at the East Bay Causeway measured a wind gust of 34 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:44:00 to 14-MAY-11 13:44:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 44.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS Station at MacDill Air Force Base measured a wind gust of 44 knots.

Marine Thunderstorm Wind in ENGLEWOOD TO TARPON SPRINGS FL OUT 20NM, GULF OF MEXICO
From 14-MAY-11 14:23:00 to 14-MAY-11 14:23:00 (EST-5)
Location: LONGBOAT KEY
Magnitude: 44.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS Station at the Sarasota-Bradenton International Airport measured a wind gust of 44 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 14-MAY-11 13:42:00 to 14-MAY-11 13:42:00 (EST-5)
Location: MIDDLE TAMPA BAY
Magnitude: 36.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The PORTS Station at Saint Petersburg measured a wind gust of 36 knots.

Marine Thunderstorm Wind in TAMPA BAY, GULF OF MEXICO
From 15-MAY-11 02:59:00 to 15-MAY-11 02:59:00 (EST-5)
Location: OLD TAMPA BAY
Magnitude: 34.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS Station at the Saint Petersburg-Clearwater International Airport measured a wind gust of 34 knots.