A squall line, associated with a mesoscale convective system which originally formed just south of the Texas Big Bend Region before expanding and racing southeast through Deep South Texas, including portions of the Lower Rio Grande Valley, rolled into the Lower Texas Coastal Waters during the late evening and crossing midnight (daylight time), producing intense rains, frequent cloud to water lightning, and gale to near storm force wind gusts in most areas.

Marine Thunderstorm Wind in WATERS FROM BAFFIN BAY TO PT MANSFIELD TX EXT FROM 20 TO 60NM, GULF OF MEXICO
From 02-JUN-10 23:45:00 to 02-JUN-10 23:55:00 (CST-6)
Location: S BAFFIN BAY
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Buoy

NOAA Buoy 42020 recorded a 10 minute period of wind gusts of 43 to 44 mph (38 knots) as squall line of thunderstorms progressed into the Lower Texas Gulf waters before 11:59 PM on June 2nd.

Marine Thunderstorm Wind in LAGUNA MADRE FROM 5NM N OF PT MANSFIELD TO BAFFIN BAY TX, GULF OF MEXICO
From 02-JUN-10 23:00:00 to 02-JUN-10 23:30:00 (CST-6)
Location: S BAFFIN BAY
Magnitude: 47.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

The Texas Coastal Ocean Observing Network Station at Baffin Bay, just 3 miles north of the Kenedy/Kleberg County line adjacent to Laguna Madre, recorded near storm force wind gusts at 2318 CST June 2nd, during a peak period of Gale Force of higher gusts that lasted for a half hour.  These winds were likely associated with a mesoscale pressure gradient between a post-squall line meso-high and a wake low, arriving more than a half hour after similar peak gusts associated with the line itself.

Marine Thunderstorm Wind in LAGUNA MADRE FROM 5NM N OF PT MANSFIELD TO BAFFIN BAY TX, GULF OF MEXICO
From 02-JUN-10 22:12:00 to 02-JUN-10 22:22:00 (CST-6)
Location: S BAFFIN BAY
Magnitude: 44.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

The Texas Coastal Ocean Observing Network station at Baffin Bay, just 3 miles north of the Kenedy/Kleberg County line, recorded a peak gust of 44 knots as the squall line raced across the Lower Texas Gulf coastal waters during the late evening of June 2nd.

Marine Thunderstorm Wind in LAGUNA MADRE FROM ARROYO COLORADO TO 5NM N OF PT MANSFIELD TX, GULF OF MEXICO
From 02-JUN-10 23:00:00 to 02-JUN-10 23:00:00 (CST-6)
Location: PORT MANSFIELD
Magnitude: 42.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The cooperative observer (Harbormaster) at Port Mansfield recorded a 42 knot (48 mph) wind gust as a squall line raced into the Lower Texas Gulf Waters during the late evening of June 2nd.

Marine Thunderstorm Wind in LAGUNA MADRE FROM PORT OF BROWNSVILLE TO ARROYO COLORADO, GULF OF MEXICO
From 02-JUN-10 23:30:00 to 02-JUN-10 23:34:00 (CST-6)
Location: ARROYO CITY
Magnitude: 37.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

The Texas Coastal Ocean Observing Network measuring station at Realitos Peninsula recorded a peak gusts of 36.7 knots (42 mph) during the late evening (CST) on June 2nd as a squall line raced into the Lower Texas Gulf coastal waters.

Marine Thunderstorm Wind in LAGUNA MADRE FROM PORT OF BROWNSVILLE TO ARROYO COLORADO, GULF OF MEXICO
From 02-JUN-10 23:41:00 to 02-JUN-10 23:54:00 (CST-6)
Location: PORT ISABEL
Magnitude: 38.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Automated Surface Observing Sensor at Cameron County Airport, approximately 4 miles west of Laguna Madre (in Bayview), recorded peak winds to gale force or higher (39 to 44 mph) from 1139 PM CST until 1153 PM CST.  The South Padre Island Coast Guard station also reported peak gusts at or above gale force, at around 1149 PM CST until approximately 1156 PM CST (interpolated).  These gusts occurred as a vigorous squall line rolled into the Lower Texas Gulf waters.

Marine Thunderstorm Wind in COASTAL WATERS FROM PT MANSFIELD TO RIO GRANDE RIVER TX OUT 20NM, GULF OF MEXICO
From 02-JUN-10 23:49:00 to 02-JUN-10 23:56:00 (CST-6)
Location: SOUTH PADRE ISLAND
Magnitude: 35.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The South Padre Island Coast Guard station also reported peak gusts at or above gale force, at around 1149 PM CST until approximately 1156 PM CST (interpolated).  These gusts occurred as a vigorous squall line rolled into the Lower Texas Gulf waters.  Note:  Distance from the Coast Guard Station to the Gulf shoreline is less than 1 mile; given the rapid movement of the squall, proxy data were used to determine gale force gusts over the open Gulf adjacent to the Town of South Padre Island.