A northwest upper level flow regime was in place. This setup commonly supports summertime severe thunderstorms. This event was one of those days where very steep lapse rates and high shear values supported several severe thunderstorms with severe marine wind.

Marine Hail in MISSISSIPPI SOUND, GULF OF MEXICO
From 19-JUN-23 15:39:00 to 19-JUN-23 15:39:00 (CST-6)
Location: BAY WAVELAND YACHT CLUB STATION (WYCM6)
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Picture sent on social media of approximately 2 inch diameter hail near Pass Christian Harbor. Time estimated by radar.

Waterspout in MISSISSIPPI SOUND, GULF OF MEXICO
From 19-JUN-23 17:10:00 to 19-JUN-23 17:10:00 (CST-6)
Location: BAY WAVELAND YACHT CLUB STATION (WYCM6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Video sent of a waterspout just off the coast of Pass Christian.

Marine Thunderstorm Wind in COASTAL WATERS FROM BOOTHVILLE LOUISIANA TO SOUTHWEST PASS OF THE MISSISSIPPI RIVER OUT 20 NM, GULF OF MEXICO
From 20-JUN-23 15:12:00 to 20-JUN-23 15:12:00 (CST-6)
Location: PILOTS STATION (PSTL1)
Magnitude: 38.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station PILL1 Pilottown, LA measured a wind gust of 44 mph.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 22:49:00 to 19-JUN-23 22:49:00 (CST-6)
Location: LKFRNT ARPT NEW
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

KNEW Lakefront Airport recorded a gust of 48 mph.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 22:48:00 to 19-JUN-23 22:48:00 (CST-6)
Location: NEW CANAL STATION (NWCL1)
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Buoy station NWCL1 New Canal Station (LA) measured a wind gust of 40 mph.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 21:34:00 to 19-JUN-23 21:34:00 (CST-6)
Location: LITTLE WOODS
Magnitude: 46.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station TS947 Sela Portable measured a wind gust of 53 mph.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 21:10:00 to 19-JUN-23 21:10:00 (CST-6)
Location: LITTLE WOODS
Magnitude: 46.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station 1872W Municipal Training Academy East measured a wind gust of 53 mph.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 21:06:00 to 19-JUN-23 21:06:00 (CST-6)
Location: MID LAKE PONTCHARTRAIN
Magnitude: 48.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station XPTN Pontchartrain Causeway measured a wind gust of 55 mph.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 20:58:00 to 19-JUN-23 20:58:00 (CST-6)
Location: NORTH LAKE PONTCHARTRAIN
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mandeville mesonet on the pier measured a wind gust of 50 mph.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 23:36:00 to 19-JUN-23 23:36:00 (CST-6)
Location: MID LAKE PONTCHARTRAIN
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Causeway mesonet reported a 46mph wind gust.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 20:56:00 to 19-JUN-23 20:56:00 (CST-6)
Location: MID LAKE PONTCHARTRAIN
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station XPTN Pontchartrain Causeway measured a wind gust of 50 mph.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 20:51:00 to 19-JUN-23 20:51:00 (CST-6)
Location: MID LAKE PONTCHARTRAIN
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station XPTN Pontchartrain Causeway measured a wind gust of 43 mph.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 20:48:00 to 19-JUN-23 20:48:00 (CST-6)
Location: NORTH LAKE PONTCHARTRAIN
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station XMVL Mandeville measured a wind gust of 47 mph.

Marine Thunderstorm Wind in LAKE PONCHARTRAIN AND LAKE MAUREPAS, GULF OF MEXICO
From 19-JUN-23 20:47:00 to 19-JUN-23 20:47:00 (CST-6)
Location: LKFRNT ARPT NEW
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

ASOS station KNEW New Orleans Lakefront Airport measured a wind gust of 47 mph.

Marine Thunderstorm Wind in LAKE BORGNE, GULF OF MEXICO
From 19-JUN-23 20:36:00 to 19-JUN-23 20:36:00 (CST-6)
Location: SHELL BEACH STATION (SHBL1)
Magnitude: 41.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Buoy station SHBL1 Shell Beach, LA measured a wind gust of 47 mph.

Marine Thunderstorm Wind in LAKE BORGNE, GULF OF MEXICO
From 19-JUN-23 19:24:00 to 19-JUN-23 19:24:00 (CST-6)
Location: SHELL BEACH STATION (SHBL1)
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

Buoy station SHBL1 Shell Beach, LA measured a wind gust of 40 mph.

Marine Thunderstorm Wind in MISSISSIPPI SOUND, GULF OF MEXICO
From 19-JUN-23 17:41:00 to 19-JUN-23 17:41:00 (CST-6)
Location: SHIP ISLAND PASS STATION (SIPM6)
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station XSHI Ship Island measured a wind gust of 71 mph.

Marine Thunderstorm Wind in COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND LOUISIANA FROM 20 TO 60 NM, GULF OF MEXICO
From 19-JUN-23 19:50:00 to 19-JUN-23 19:50:00 (CST-6)
Location: NDBC BUOY 42040
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station 42040 70 S Sand Island measured a wind gust of 40 mph.

Marine Thunderstorm Wind in COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND LOUISIANA FROM 20 TO 60 NM, GULF OF MEXICO
From 19-JUN-23 19:35:00 to 19-JUN-23 19:35:00 (CST-6)
Location: MAIN PASS 289 AWOS (KVKY)
Magnitude: 40.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS station KVKY Main Pass 289C measured a wind gust of 46 mph.

Marine Thunderstorm Wind in COASTAL WATERS FROM STAKE ISLAND LOUISIANA TO SOUTHWEST PASS OF THE MISSISSIPPI RIVER FROM 20 TO 60 NM, GULF OF MEXICO
From 19-JUN-23 19:20:00 to 19-JUN-23 19:20:00 (CST-6)
Location: MISSISSIPPI CANYON - NAKIKA (KIKT)
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS station KIKT (Nakika Subsea Development Platform) measured a wind gust of 44 mph.

Marine Thunderstorm Wind in COASTAL WATERS FROM PASCAGOULA MISSISSIPPI TO STAKE ISLAND LOUISIANA FROM 20 TO 60 NM, GULF OF MEXICO
From 19-JUN-23 18:15:00 to 19-JUN-23 18:15:00 (CST-6)
Location: MAIN PASS 289 AWOS (KVKY)
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

AWOS station KVKY Main Pass 289C measured a wind gust of 49 mph.

Marine Thunderstorm Wind in MISSISSIPPI SOUND, GULF OF MEXICO
From 19-JUN-23 15:52:00 to 19-JUN-23 15:52:00 (CST-6)
Location: WEST PIER GULFPORT STATION (GWPM6)
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Keesler Air Force Base measured a wind gust of 44 mph.

Marine Thunderstorm Wind in MISSISSIPPI SOUND, GULF OF MEXICO
From 19-JUN-23 15:30:00 to 19-JUN-23 15:30:00 (CST-6)
Location: PETIS BOIS ISLAND STATION (PTBM6)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Petit Bois Island recorded a wind gust of 65 mph.

Marine Thunderstorm Wind in MISSISSIPPI SOUND, GULF OF MEXICO
From 19-JUN-23 15:30:00 to 19-JUN-23 15:30:00 (CST-6)
Location: BAY WAVELAND YACHT CLUB STATION (WYCM6)
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Bay Waveland Yacht Club measured a wind gust of 50 mph.

Marine Thunderstorm Wind in MISSISSIPPI SOUND, GULF OF MEXICO
From 19-JUN-23 15:30:00 to 19-JUN-23 15:30:00 (CST-6)
Location: BAY WAVELAND YACHT CLUB STATION (WYCM6)
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Bay Waveland Yacht Club measured a wind gust of 50 mph.

Marine Thunderstorm Wind in MISSISSIPPI SOUND, GULF OF MEXICO
From 19-JUN-23 16:46:00 to 19-JUN-23 16:46:00 (CST-6)
Location: WEST PIER GULFPORT STATION (GWPM6)
Magnitude: 43.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station XGPT Gulfport measured a wind gust of 50 mph.